1. The utility model provides a portable farmland is driped irrigation and is leaked stoppage system of patrolling and examining, its characterized in that, it includes:

the humidity acquisition module (1) is used for acquiring the apparent dielectric constant of the soil humidity on the drip irrigation laying path and generating a soil humidity analog signal;

the signal conversion module is used for receiving the soil humidity analog signal acquired by the humidity acquisition module (1) and converting the soil humidity analog signal into a soil humidity digital signal;

the clock module (3) is used for defining a time variable of the humidity acquisition module (1) during polling measurement, performing leap year compensation according to the time of the month, the day, the week, the hour and the minute, and acquiring a time variable signal during measurement;

the storage module (9) is used for storing the soil humidity digital signal and storing a time variable signal acquired by the clock module (3), and a soil humidity threshold parameter is prestored in the storage module (9);

the alarm module (2) is used for sending out an alarm prompt when the soil humidity is abnormal;

a display module (8) for displaying the soil moisture digital signal, a time variable signal and the soil moisture threshold parameter; and

signal processing module (6), it is used for receiving the time variable signal and the soil humidity digital signal of clock module (3), will soil humidity digital signal with the soil humidity threshold value parameter comparison that prestores in storage module (9) is in order to judge whether soil humidity digital signal surpasss the threshold interval of soil humidity threshold value parameter is when surpassing during the threshold interval of soil humidity threshold value parameter, be used for control alarm module (2) send the warning suggestion, still be used for with soil humidity digital signal, soil humidity threshold value parameter and the time variable signal transmission of clock module (3) to display module (8) show.

2. The portable farmland drip irrigation leak stoppage inspection system according to claim 1, characterized in that: the inspection system further comprises:

and the power supply module (5) is connected with the signal processing module (6) and used for supplying power to the system during measurement.

3. The portable farmland drip irrigation leak stoppage inspection system according to claim 1, characterized in that: signal processing module (6) are connected the signal input port of humidity acquisition module (1), humidity acquisition module (1) is soil moisture sensor (11), and soil moisture sensor (11) insert the probe that one end in the soil has the sharp needle for the integration, soil moisture sensor (11) still include with the transmission line (13) of probe connection and be connected the signal source that is used for gathering soil moisture signal with transmission line (13).

4. The portable farmland drip irrigation leak stoppage inspection system according to claim 1, characterized in that: the signal conversion module is an analog-to-digital converter integrated in the signal processing module (6), the storage module (9) is also integrated in the signal processing module (6), and the storage module (9) is used for storing the collected soil humidity digital signal and the defined time variable signal in the storage module (9) and also storing a preset soil humidity threshold parameter.

5. The portable farmland drip irrigation leak stoppage inspection system according to claim 1, characterized in that: the inspection system further comprises:

the crystal oscillator circuit resetting module (4) is arranged between the clock module (3) and the signal processing module (6) and is used for giving a forced resetting signal to the signal processing module (6) to restart or recover normal operation when the inspection system is in a dead halt abnormal condition, and providing clock frequency for the inspection system;

the control port of the clock module (3) is connected with the signal processing module (6), and the crystal oscillator circuit reset module (4) is connected with the control port of the clock module (3).

6. The portable farmland drip irrigation leak stoppage inspection system according to claim 1, characterized in that: the inspection system further comprises:

and the key module (7) is used for modifying the maximum value and the minimum value of the threshold value interval of the soil humidity threshold value parameter stored in the storage module (9) so as to change the pre-stored soil humidity threshold value parameter, and is also used for adjusting the time variable signal acquired by the clock module (3).

7. The portable farmland drip irrigation leak stoppage inspection system according to claim 1, characterized in that: the inspection system further comprises:

and the serial port data transmission module (10) is used for transmitting the soil humidity digital signals after the acquisition and storage are finished to a computer through a serial port in a serial communication mode for data analysis and statistics.

8. A portable farmland drip irrigation leakage stoppage inspection method which is applied to the portable farmland drip irrigation leakage stoppage inspection system according to any one of claims 1 to 7, and is characterized by comprising the following steps:

acquiring an apparent dielectric constant of soil humidity on a drip irrigation laying path, and generating a soil humidity simulation signal;

receiving the collected soil humidity analog signal, and converting to generate a soil humidity digital signal;

defining a time variable during inspection and measurement, and performing leap year compensation according to the time, hour, minute and second of the month, day, week and hour to acquire a time variable signal during measurement;

storing the soil humidity digital signal generated by conversion after collection and the acquired time variable signal;

will soil humidity digital signal compares with the soil humidity threshold value parameter of prestoring to judge whether soil humidity digital signal surpasss the threshold value interval of soil humidity threshold value parameter, when surpassing during the threshold value interval of soil humidity threshold value parameter, control alarm module (2) send the suggestion of reporting to the police, still will soil humidity digital signal, soil humidity threshold value parameter and the time variable signal transmission of clock module (3) shows to display module (8).

9. The portable farmland drip irrigation leak stoppage inspection method according to claim 8, characterized in that: and transmitting the soil humidity digital signals after the acquisition and storage are finished to a computer through a serial port by adopting a serial communication mode for data analysis and statistics.

10. A portable farmland drip irrigation leakage stoppage inspection device is characterized in that the portable farmland drip irrigation leakage stoppage inspection method according to any one of claims 8 to 9 is adopted; the inspection device includes:

the soil humidity sensor (11) is connected with at least one stainless steel probe (12) at the bottom and used for acquiring the apparent dielectric constant of the soil humidity on the drip irrigation laying path and generating a soil humidity analog signal;

the test host (15) is connected with the soil humidity sensor (11) through a transmission line (13); and

the soil humidity sensor (11) is mounted at the bottom of the inspection bracket;

wherein the test host (15) comprises:

the main control chip is connected with an analog signal voltage output end (14) of the soil humidity sensor (11) and used for acquiring a soil humidity digital signal generated by conversion after detection of the soil humidity sensor (11) and comparing the soil humidity digital signal with a prestored soil humidity threshold parameter so as to judge whether the soil humidity digital signal exceeds a threshold interval of the soil humidity threshold parameter;

the clock chip is connected with the main control chip and is used for timing the time of the month, the day, the week, the hour, the minute and the second during the polling measurement, performing leap year compensation and acquiring a time variable signal during the measurement;

the display is connected with the main control chip and is used for displaying the soil humidity digital signal for inspection, the soil humidity threshold parameter and the time variable signal of the clock chip;

the memory is connected with the main control chip and used for storing the time variable signals acquired by the clock chip, and soil humidity threshold parameters are prestored in the memory;

the operation key is connected with the main control chip and used for modifying the maximum value and the minimum value of the threshold interval of the soil humidity threshold parameter stored in the memory so as to change the pre-stored soil humidity threshold parameter and adjusting the time variable signal acquired by the clock chip;

the buzzer is connected with the main control chip and used for giving an alarm when the soil humidity digital signal exceeds the threshold interval of the soil humidity threshold parameter;

the positive electrode and the negative electrode of the power supply are electrically connected with the soil humidity sensor (11) and the main control chip and are used for supplying power to a system during measurement; and

the main control chip, the clock chip, the display, the memory and the power supply are arranged in the shell, and the display, the operation key and the buzzer are embedded in the shell.

Background

The current irrigation mode of farmland mainly has the sprinkling irrigation and drips irrigation, and the sprinkling irrigation has the condition of a large amount of wastes of water resource because of permeating the crop root from the surface irrigation, and equipment input cost is higher in earlier stage. The drip irrigation system directly acts on the root of the crop, has the characteristics of water resource saving and low cost, and the current spray irrigation in the large-scale planting of the farmland has the tendency of being gradually replaced by the drip irrigation. However, the drip irrigation pipe is buried underground, so that the blocking and leakage of the drip irrigation pipe are not easy to be found, and in the drip irrigation use process of a farmland, when the drip irrigation head buried underground is blocked, a planting worker cannot find the blockage in time, and the situation is too late when the blockage is seen from the growth of crops. In addition, the normal operation of the drip irrigation system is also affected by water leakage in the drip irrigation pipeline.

In order to carry out mobile inspection on a drip irrigation laying path regularly or irregularly so as to find the blockage and water leakage (drip irrigation pipe damage) of a drip irrigation head (or pipe) in time, and planting personnel can take corresponding remedial measures in time. The system, the method and the device for detecting the drip irrigation pipe leakage stoppage in the farmland are needed to detect the soil humidity around the drip irrigation pipe and judge the leakage and blockage conditions of the drip irrigation pipe by utilizing the abnormal value of the soil humidity, so that a powerful solution is provided for timely finding the leakage and hidden danger elimination of the leakage and blockage of the drip irrigation pipe of a large-area drip irrigation planting farmer, and the production loss caused by untimely treatment of the leakage and blockage of the drip irrigation pipe is avoided.

Disclosure of Invention

Aiming at the blocking and leaking conditions of the drip irrigation pipe, the invention provides a portable farmland drip irrigation leaking stoppage inspection system, a method and a device, which can find the blocking and leaking conditions of a drip irrigation head (or pipe) and water leakage (the drip irrigation pipe is damaged) in time, have the characteristics of simple operation, convenient carrying, quick measurement and low cost, and are convenient for moving inspection on a drip irrigation laying path at regular or irregular intervals so as to find the blocking and leaking positions of the drip irrigation pipe and take remedial measures in time.

The invention is realized by adopting the following technical scheme: the utility model provides a portable farmland is driped irrigation and is leaked stoppage system of patrolling and examining, it includes:

the humidity acquisition module is used for acquiring the apparent dielectric constant of the soil humidity on the drip irrigation laying path and generating a soil humidity analog signal;

the signal conversion module is used for receiving the soil humidity analog signal acquired by the humidity acquisition module and converting the soil humidity analog signal into a soil humidity digital signal;

the clock module is used for defining a time variable of the humidity acquisition module during polling measurement, performing leap year compensation according to the time, hour, minute and second of the month, day, week and hour, and acquiring a time variable signal during measurement;

the storage module is used for storing the soil humidity digital signal and storing a time variable signal acquired by the clock module, and a soil humidity threshold parameter is prestored in the storage module;

the alarm module is used for sending out an alarm prompt when the soil humidity is abnormal;

the display module is used for displaying the soil humidity digital signal, the time variable signal and the soil humidity threshold parameter; and

the signal processing module is used for receiving the time variable signal and the soil humidity digital signal of the clock module, and the soil humidity digital signal is compared with the soil humidity threshold value parameter prestored in the storage module to judge whether the soil humidity digital signal exceeds the threshold value interval of the soil humidity threshold value parameter, and when the soil humidity digital signal exceeds the threshold value interval of the soil humidity threshold value parameter, the signal processing module is used for controlling the alarm module to send out an alarm prompt and is also used for sending the time variable signal of the clock module to the display module to display.

As a further improvement of the above scheme, the inspection system further includes:

and the power supply module is connected with the signal processing module and used for supplying power to the system during measurement.

As a further improvement of the above scheme, the signal processing module is connected the signal input port of humidity acquisition module, humidity acquisition module is soil moisture sensor, and soil moisture sensor inserts the probe that the one end in the soil has the point needle for the integration, soil moisture sensor still includes the transmission line of being connected with the probe and is used for gathering the signal source of soil moisture signal with transmission line connection.

As a further improvement of the above scheme, the signal conversion module is an analog-to-digital converter integrated inside the signal processing module, the storage module is also integrated inside the signal processing module, and the storage module is configured to store the collected soil humidity digital signal and the defined time variable signal in the storage module, and further store a preset soil humidity threshold parameter.

As a further improvement of the above scheme, the inspection system further includes:

the crystal oscillator circuit reset module is arranged between the clock module and the signal processing module and used for giving a forced reset signal to the signal processing module to restart or recover normal operation when the inspection system is in a dead halt abnormal condition and providing clock frequency for the inspection system;

the control port of the clock module is connected with the signal processing module, and the crystal oscillator circuit reset module is connected with the control port of the clock module.

As a further improvement of the above scheme, the inspection system further includes:

and the key module is used for modifying the maximum value and the minimum value of the threshold interval of the soil humidity threshold parameter stored in the storage module so as to change the pre-stored soil humidity threshold parameter, and is also used for adjusting the time variable signal acquired by the clock module.

As a further improvement of the above scheme, the inspection system further includes:

and the serial port data transmission module is used for transmitting the soil humidity digital signals after the acquisition and storage are finished to the computer through a serial port in a serial communication mode for data analysis and statistics.

The invention also provides a portable farmland drip irrigation leakage stoppage inspection method, which comprises the following steps:

acquiring an apparent dielectric constant of soil humidity on a drip irrigation laying path, and generating a soil humidity simulation signal;

receiving the collected soil humidity analog signal, and converting to generate a soil humidity digital signal;

defining a time variable during inspection and measurement, and performing leap year compensation according to the time, hour, minute and second of the month, day, week and hour to acquire a time variable signal during measurement;

storing the soil humidity digital signal generated by conversion after collection and the acquired time variable signal;

and comparing the soil humidity digital signal with a prestored soil humidity threshold value parameter to judge whether the soil humidity digital signal exceeds the threshold value interval of the soil humidity threshold value parameter, and when the soil humidity digital signal exceeds the threshold value interval of the soil humidity threshold value parameter, controlling an alarm module to send an alarm prompt and sending the soil humidity digital signal, the soil humidity threshold value parameter and a time variable signal of a clock module to a display module to display.

As a further improvement of the scheme, the method also comprises the step of transmitting the soil humidity digital signals after the acquisition and storage are finished to a computer through a serial port by adopting a serial communication mode for data analysis and statistics.

The invention also provides a portable farmland drip irrigation leakage stoppage inspection device which adopts the arbitrary portable farmland drip irrigation leakage stoppage inspection method; the inspection device includes:

the soil humidity sensor is connected with at least one stainless steel probe at the bottom and used for acquiring the apparent dielectric constant of the soil humidity on the drip irrigation laying path and generating a soil humidity analog signal;

the test host is connected with the soil humidity sensor through a transmission line; and

the soil humidity sensor is arranged at the bottom of the inspection bracket;

wherein, the test host computer includes:

the main control chip is connected with the analog signal voltage output end of the soil humidity sensor and used for acquiring a soil humidity digital signal generated by conversion after detection of the soil humidity sensor and comparing the soil humidity digital signal with a prestored soil humidity threshold parameter so as to judge whether the soil humidity digital signal exceeds a threshold interval of the soil humidity threshold parameter;

the clock chip is connected with the main control chip and is used for timing the time of the month, the day, the week, the hour, the minute and the second during the polling measurement, performing leap year compensation and acquiring a time variable signal during the measurement;

the display is connected with the main control chip and is used for displaying the soil humidity digital signal for inspection, the soil humidity threshold parameter and the time variable signal of the clock chip;

the memory is connected with the main control chip and used for storing the time variable signals acquired by the clock chip, and soil humidity threshold parameters are prestored in the memory;

the operation key is connected with the main control chip and used for modifying the maximum value and the minimum value of the threshold interval of the soil humidity threshold parameter stored in the memory so as to change the pre-stored soil humidity threshold parameter and adjusting the time variable signal acquired by the clock chip;

the buzzer is connected with the main control chip and used for giving an alarm when the soil humidity digital signal exceeds the threshold interval of the soil humidity threshold parameter;

the positive electrode and the negative electrode of the power supply are electrically connected with the soil humidity sensor and the main control chip and are used for supplying power to a system during measurement; and

the main control chip, the clock chip, the display, the memory and the power supply are arranged in the shell, and the display, the operation key and the buzzer are embedded in the shell.

The invention detects the soil humidity around the drip irrigation pipe by the soil humidity sensor and judges the blocking and leakage conditions of the drip irrigation pipe by the abnormal value of the soil humidity. The invention has the advantages of portable equipment, simple and quick measurement, real-time data display, low manufacturing cost, suitability for large-area popularization and the like. The application of the invention can provide a powerful solution for timely finding and eliminating the hidden danger of the large-area drip irrigation pipe blockage and leakage of the drip irrigation planting farmers, and avoid the production loss caused by untimely treatment of the drip irrigation pipe blockage and leakage.

Drawings

Fig. 1 is a schematic block structure diagram of a portable farmland drip irrigation leakage stoppage inspection system in embodiment 1 of the invention.

Fig. 2 is a circuit diagram of the signal processing module in fig. 1.

Fig. 3 is a circuit diagram of the display module in fig. 1.

Fig. 4 is a circuit diagram of the clock module of fig. 1.

Fig. 5 is a circuit diagram of the key module in fig. 1.

Fig. 6 is a schematic circuit diagram of the alarm module of fig. 1.

Fig. 7 is a circuit diagram of the power module in fig. 1.

Fig. 8 is a schematic circuit diagram of the serial port data transmission module in fig. 1.

Fig. 9 is a schematic structural view of a soil humidity sensor in the inspection system according to embodiment 1 of the present invention.

Fig. 10 is a schematic wiring diagram of a soil moisture sensor in the inspection system according to embodiment 1 of the present invention.

Fig. 11 is a flow chart of the portable farmland drip irrigation leakage stoppage inspection method of embodiment 2 of the invention.

Fig. 12 is a schematic structural view of the portable farmland drip irrigation leakage stoppage inspection device in embodiment 3 of the invention.

In the figure: the device comprises a humidity acquisition module, a 2 alarm module, a 3 clock module, a 4 crystal oscillator circuit reset module, a 5 power supply module, a 6 signal processing module, a 7 key module, an 8 display module, a 9 storage module, a 10 serial port data transmission module, a 11 soil humidity sensor, a 12 stainless steel probe, a 13 transmission line, a 14 analog signal voltage output end, a 15 test host, a 16 handle, a 17 connecting rod and a 18 pedal.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1

Referring to fig. 1, the inspection system of the present embodiment is used for detecting a moisture value of soil around a plugging/leaking position of a drip irrigation pipe. The inspection system comprises a humidity acquisition module 1, a signal conversion module, an alarm module 2, a clock module 3, a crystal oscillator circuit reset module 4, a power module 5, a signal processing module 6, a key module 7, a display module 8, a storage module 9 and a serial port data transmission module 10.

Humidity acquisition module 1, signal conversion module, alarm module 2, clock module 3, display module 8, storage module 9, signal processing module 6 are the minimum set of system of patrolling and examining, and humidity acquisition module 1 is used for gathering the apparent dielectric constant of soil humidity on driping irrigation the laying path, and the simulation signal of soil humidity is generated. And the signal conversion module is used for receiving the soil humidity analog signal acquired by the humidity acquisition module 1 and converting the soil humidity analog signal into a soil humidity digital signal.

The clock module 3 is used for defining a time variable of the humidity acquisition module 1 during polling measurement, performing leap year compensation according to the time, hour, minute and second of the month, day, week and hour, and acquiring a time variable signal during measurement; the storage module 9 is configured to store the soil humidity digital signal, and is further configured to store a time variable signal acquired by the clock module 3, and a soil humidity threshold parameter is also prestored in the storage module 9; the alarm module 2 is used for sending out an alarm prompt when the soil humidity is abnormal; the display module 8 is used for displaying the soil humidity digital signal, the time variable signal and the soil humidity threshold parameter;

signal processing module 6 is used for receiving clock module 3's time variable signal and soil moisture digital signal, will soil moisture digital signal with the soil moisture threshold value parameter comparison of prestoring in the storage module 9 is judged whether soil moisture digital signal surpasses the threshold value interval of soil moisture threshold value parameter is worked as surpassing during the threshold value interval of soil moisture threshold value parameter, be used for control alarm module 2 sends the suggestion of reporting to the police, still be used for with soil moisture digital signal, soil moisture threshold value parameter and clock module 3's time variable signal send to display module 8 shows.

Fig. 2 to 8 are schematic circuit connection diagrams of the portable farmland drip irrigation leakage stoppage inspection system according to the present invention. In the control circuit. Referring to fig. 2, the signal processing module 6 includes a capacitor, a resistor, a crystal oscillator, and a main control chip. Wherein, the resistance includes: r1, R2, the electric capacity includes: c3, C4, C11, the crystal oscillator is Y1, the main control chip is STC90C58AD singlechip and is used as the processing of signal or produces corresponding instruction and control other modules and produce corresponding action, its inside is integrated with 8 ways 10 bit high-speed A/D converter, can be used to mains voltage detection, temperature detection, key scanning and spectrum detection. In the I/O device formed by the signal processing module 6, the P0 port of the main control chip STC90C58AD is connected with the pull-up resistor of 10K and then connected with the data port of the display module 8 for displaying the measurement data. A port P1.0 of the master control chip STC90C58AD is connected with a signal input end of the humidity acquisition module 1 and is used for inputting a soil humidity signal; a P2 port of the main control chip STC90C58AD is respectively connected with a control port of the key module 7 circuit and a control port of the display module 8 and is used for inputting key modification information and outputting soil humidity value and time information; the P3 port of the main control chip STC90C58AD is respectively connected with the control port of the clock module 3, the serial port data transmission module 10 and the alarm module 2.

Referring to fig. 3, the display module 8 is configured to display the soil humidity digital signal information generated by conversion according to the measured soil humidity analog signal representing the soil humidity value, and is further configured to display the time variable signal for obtaining the measured time information, and display the pre-stored soil humidity threshold parameter. The display module 8 adopts an LCD (liquid crystal display), specifically adopts a 1602 LCD, is driven by 5V voltage, can display two lines of 16 characters in each line, and is used for displaying measurement information such as measurement time, soil humidity value and the like. Pin 4-pin 14 of the 1602 LCD are connected with pin P27, pin P26, pin P25 and pin P00-pin 07 of the STC90C58AD respectively, pin 1 and pin 16 of the 1602 LCD are connected with the ground, pin 2 and pin 15 of the 1602 LCD are connected with the supply voltage VCC of the circuit respectively, and pin 3 of the 1602 LCD is connected with the supply voltage VCC with 10K variable resistance and grounded.

Referring to fig. 4, a clock module 3 is connected to a signal processing module 6, the clock module 3 is configured to provide time information for measurement to a master control chip STC90C58AD, the clock chip DS1302 adopted by the clock module 3 is a clock chip developed by DALLAS corporation, usa, and is capable of timing the year, month, day, week, minute and second, performing leap year compensation, and acquiring a time variable signal during measurement, and a real-time clock circuit with RAM is provided inside the clock chip. High performance, low power consumption, and 2.5-5.5V working voltage. The pin 1 and the pin 8 of the clock chip DS1302 are connected with the voltage of the circuit, the pin 5, the pin 6 and the pin 7 of the clock chip DS1302 are respectively connected with the pin P35, the pin P36 and the pin P37 of the main control chip STC90C58AD, and the pin 2, the pin 3 and the pin 4 of the clock chip DS1302 are connected with the crystal oscillator Y2 of 32768HZ and the capacitors C11 and C12.

Clock module 3 with be provided with crystal oscillator circuit reset module 4 between signal processing module 6, crystal oscillator circuit reset module 4 is used for giving when the abnormal condition that system's crash appears patrolling and examining 6 forced reset signal of signal processing module is in order to restart or resume normal operating, and for patrol and examine the system and provide clock frequency.

Referring to fig. 5, the key module 7 is connected to the signal processing module 6, and the relays K1, K2, K3, and K4 of the key module 7 are grounded and connected to the pin P20, the pin P21, the pin P22, and the pin P23 of the main control chip STC90C58AD, respectively. The key module 7 is mainly used for modifying the maximum value and the minimum value of the threshold interval of the soil humidity threshold parameter stored in the storage module 9 so as to change the pre-stored soil humidity threshold parameter and facilitate the storage of corresponding soil humidity information. The key can also adjust the time of the system and adjust the time variable signal acquired by the clock module 3.

Referring to fig. 6, the alarm module 2 is used for alarm prompt when the soil humidity exceeds a set threshold range, and the alarm module 2 includes a resistor, a triode, and a buzzer. Wherein, the resistance includes: 4.7K R2, the transistor comprising: q1, buzzer for adopt audible alarm's mode to report to the police and indicate, the arrangement of triode is the PNP type, and three pin of triode is E transmitting stage, B base level, C collecting electrode respectively, and the E transmitting stage of triode inserts the voltage of circuit, and the C collecting electrode of triode connects buzzer, and the B base level of triode connects resistance R2, and resistance R2 connects the pin P32 of master control chip STC90C58 AD. The triode is used for taking current from a power supply and guiding the buzzer equipment for electricity utilization.

Referring to fig. 7, the power module 5 is used to supply power to the system during measurement. The power module 5 adopts 5-section 1.5v dry batteries for power supply, and 7.5v voltage is stabilized into 5v voltage through the three-terminal integrated voltage stabilizer 7805 in circuit design. The power supply effect of low power consumption, low cost, stability, reliability and portability is achieved.

Referring to fig. 8, the serial port data transmitting module 10 transmits the collected and stored soil humidity data to the computer through the serial port for data analysis and statistics by using a serial communication manner. The serial port data transmission module 10 comprises a resistor, a triode and a positive and negative symmetrical power supply. Wherein, the resistance includes: r9, R12 at 10K, R10, R11 at 4.7K; the triode includes: q6, Q7; the positive and negative symmetric power supply is JM1, and the serial data transmission module 10 is connected with a pin P30 and a pin P31 of the main control chip STC90C58 AD. The serial port data transmission module 10 is used for transmitting data to a computer for data analysis and statistics in a serial communication mode after soil humidity data collection and storage are completed.

The invention also stores the collected soil humidity data and the parameter data after power failure by arranging a storage module 9, and the storage module 9 is integrated in the signal processing module 6. The main control chip STC90C58AD is internally integrated with a 29K E2PROM memory, the memory is separated from a program space, internal Flash can be used as the E2PROM by utilizing an ISP/IAP technology, and the erasing frequency is more than 10 ten thousand times. The data need in time be stored after soil humidity has been gathered, conveniently modify the data and can preserve the parameter data after the power failure, prevent that the data from losing after the system outage, also make things convenient for people to download the data to the computer through downloading the interface and carry out data analysis.

The invention detects soil humidity signals of soil on a drip irrigation laying path through a humidity acquisition module 1, wherein the humidity acquisition module 1 is a soil humidity sensor 11, the end part of the humidity acquisition module is inserted into the soil to be detected, and the humidity acquisition module is used for measuring the apparent dielectric constant of the real reaction moisture content of the soil by adopting an electromagnetic pulse principle. Soil moisture sensor 11 inserts the probe that the one end in the soil has the point needle for the integration, soil moisture sensor 11 still includes the transmission line 13 of being connected with the probe and is connected the signal source that is used for gathering soil moisture signal with transmission line 13.

In the embodiment of the present invention, the soil moisture sensor 11 is of the type PHTS-5V-V2, as shown in fig. 9. The soil moisture sensor 11 consists of a 50MHZ signal source, a coaxial transmission line and a four-pin stainless steel probe 12. The soil humidity sensor 11 measures the apparent dielectric constant of soil by adopting an electromagnetic pulse principle, and because the soil is composed of solid, water and air, the dielectric constant of the solid is about 4, the dielectric constant of the water is about 80, the dielectric constant of the air is about 1, and the dielectric constant of the soil is mainly determined by moisture, the real moisture content of the soil can be obtained by measuring the dielectric constant of the soil. The measurement accuracy of the soil humidity sensor 11 with the model number of PHTS-5V-V2 is within 2%, which is enough to meet the measurement requirement of drop irrigation blockage, meanwhile, compared with other dielectric method tacheometers with higher accuracy, the soil humidity sensor 11 has the characteristics of higher sensitivity, rapid and accurate measurement, stability, reliability and the like, the cost is greatly reduced, and the soil humidity sensor is particularly free from the influence of chemical fertilizers and metal ions in soil and is suitable for measuring the drop irrigation soil humidity.

Preferably, the signal conversion module is disposed inside the soil humidity sensor 11, and is configured to convert the collected soil humidity analog signal into a soil humidity digital signal.

When patrolling and examining, signal processing module 6 is used for receiving clock module 3's time variable signal and soil humidity digital signal, will soil humidity digital signal with the soil humidity threshold value parameter comparison that prestores in storage module 9, in order to judge whether soil humidity digital signal surpasss the threshold value interval of soil humidity threshold value parameter is when surpassing during the threshold value interval of soil humidity threshold value parameter, be used for control alarm module 2 sends the warning suggestion, still be used for with soil humidity digital signal, soil humidity threshold value parameter and clock module 3's time variable signal send to display module 8 shows.

In the portable soil humidity testing system, the humidity value of soil is required to be measured quickly and in real time, in view of the characteristic of portability, a power supply mode of the sensor is required to be designed to be 5v dry battery power supply, in the measuring process, the voltage of the dry battery is reduced, the influence on the testing humidity is not great under the condition of normal power supply, the wiring of the soil humidity sensor 11 is shown in fig. 10, a red wire of the soil humidity sensor 11 is connected with the anode of the power module 5, a green wire of the soil humidity sensor 11 is connected with the cathode of the power module 5, and a yellow wire of the soil humidity sensor 11 is connected with an analog signal voltage output end 14 of the soil humidity sensor 11.

The portable soil humidity testing system comprises a humidity acquisition module 1, an alarm module 2, a clock module 3, a crystal oscillator circuit reset module 4, a power supply module 5, a signal processing module 6, a key module 7, a display module 8, a storage module 9 and a serial port data transmission module 10, realizes soil humidity signal detection around the plugging and leaking positions of a drip irrigation pipe, and gives an alarm when the soil humidity exceeds a set threshold value interval to prompt the alarm

In conclusion, the portable soil humidity testing system can utilize the humidity acquisition module 1 to detect soil humidity signals around the plugging and leaking positions of the drip irrigation pipe, is convenient to operate, obtains the humidity value of the soil to be measured by arranging the signal processing module 6, and utilizes the alarm module 2 to give an alarm when the humidity value of the soil exceeds a set threshold interval, so that the blockage and water leakage (drip irrigation pipe damage) of the drip irrigation head (or pipe) can be found in time, and planting personnel can take corresponding remedial measures in time.

Example 2

Referring to fig. 11, the invention provides a portable farmland drip irrigation leakage stoppage inspection method, which comprises the following steps:

step S1, collecting the apparent dielectric constant of soil humidity on the drip irrigation paving path and generating a soil humidity analog signal;

step S2, receiving the collected soil humidity analog signal, and converting to generate a soil humidity digital signal;

step S3, defining a time variable during inspection measurement, and performing leap year compensation according to the time, hour, minute and second of the month, day, week and minute to acquire a time variable signal during measurement;

step S4, storing the soil humidity digital signal generated by conversion after collection and the acquired time variable signal;

step S5, the soil humidity digital signal is compared with the prestored soil humidity threshold value parameter to judge whether the soil humidity digital signal exceeds the threshold value interval of the soil humidity threshold value parameter, when the soil humidity digital signal exceeds the threshold value interval of the soil humidity threshold value parameter, the alarm module 2 is controlled to send out an alarm prompt, and the soil humidity digital signal, the soil humidity threshold value parameter and the time variable signal of the clock module 3 are sent to the display module 8 to be displayed.

The inspection method of the present invention may be designed such that a computer program is injected into the signal processing module 6 of embodiment 1, and the signal processing module 6 implements the function of the inspection method.

In this embodiment, the inspection method is mainly applied to the inspection system in embodiment 1. The inspection method further comprises the following steps: and transmitting the soil humidity digital signals after the acquisition and storage are finished to a computer through a serial port by adopting a serial communication mode for data analysis and statistics.

Example 3

Referring to fig. 12, the invention provides a portable farmland drip irrigation leakage stoppage inspection device, which adopts the portable farmland drip irrigation leakage stoppage inspection method according to embodiment 2, and the inspection device comprises a soil humidity sensor 11, a test host 15 and an inspection bracket.

The bottom of the soil moisture sensor 11 is connected with at least one stainless steel probe 12, in the embodiment of the invention, the bottom of the soil moisture sensor 11 is connected with a four-pin stainless steel probe 12 which is connected with the test host 15 through a transmission line 13, and the soil moisture sensor 11 can be fixed on an inspection bracket. In the embodiment of the invention, the inspection bracket can be a walking stick with a foot pedal 18, the walking stick comprises a connecting rod 17 for connecting the foot pedal 18 and a handle 16 fixed at the top of the connecting rod 17, wherein the soil humidity sensor 11 is fixed at the bottom of the connecting rod 17, when the drip irrigation inspection test is carried out, please refer to fig. 12, a control test host 15 can be held by the right hand, so that the real-time operation and the test result can be conveniently checked, the handle 16 of the walking stick is held by the left hand, when a drip irrigation path passes through, the stainless steel probe 12 of the soil humidity sensor 11 is inserted into a farmland in a manner of stepping on the foot pedal 18 by feet, the soil humidity information at the position is measured, the humidity value on the uniform drip irrigation pipeline diameter basically does not change greatly under normal conditions, and when a certain section is blocked, the humidity value is abnormally low; when water leaks from a certain section, the humidity value is abnormally high. The positions of the drip irrigation pipe blockage and leakage can be found by the regular inspection of the drip irrigation pipe by the staff, and remedial measures can be taken in time.

The test host 15 comprises a shell, a main control chip, a clock chip, a display, a memory and a power supply are arranged in the shell, and the display, an operation key and a buzzer are embedded in the shell. Wherein, main control chip with soil moisture sensor 11's analog signal output 14 is connected, and analog signal output 14 passes through transmission line 13 with soil moisture sensor 11 connects for the apparent dielectric constant of soil moisture on the collection is driped irrigation and is laid the route, and generates soil moisture analog signal, and with through built-in signal converter, will receive the soil moisture analog signal that soil moisture sensor 11 gathered, and convert and generate soil moisture digital signal. The clock chip is connected with the main control chip and used for timing the time of the year, month, day, week, hour, minute and second during the inspection and measurement, performing leap year compensation, acquiring the measured time information and obtaining a time variable signal during the measurement. The display is connected with the main control chip and used for displaying the measured soil humidity digital signal, the time variable signal and the soil humidity threshold parameter. The memory is connected with the main control chip and used for storing soil humidity data and parameter data after power failure, specifically, storing the soil humidity digital signal and the time variable signal acquired by the clock chip, and soil humidity threshold parameters are also prestored in the memory. The operation key is connected with the main control chip and used for modifying the maximum value and the minimum value of the threshold interval of the soil humidity stored in the memory and adjusting the time information of the system of the clock chip. The buzzer is connected with the main control chip and used for giving an alarm when the soil humidity value exceeds a set threshold interval. The positive and negative poles of the power supply are electrically connected with the soil humidity sensor 11 and the main control chip.

The portable farmland drip irrigation leakage stoppage inspection device has the characteristics of portability, convenient operation and suitability for farmland drip irrigation leakage stoppage and leakage rapid detection operation, detects the soil humidity around the drip irrigation pipe through the soil humidity sensor 11, judges the leakage stoppage and leakage conditions of the drip irrigation pipe by utilizing the abnormal value of the soil humidity, provides a powerful solution means for timely finding and eliminating hidden dangers, and avoids the production loss caused by untimely treatment of the leakage stoppage and leakage of the drip irrigation pipe.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.