1. The utility model provides an infrared earth's surface temperature observation system, includes core processor, information acquisition module, data output module, power module and storage module, its characterized in that: the information acquisition module is including the laser rangefinder module that is used for measuring the distance between system and the underlying surface, the infrared temperature measurement module that is used for measuring the underlying surface temperature and the image acquisition module that is used for discerning underlying surface type and corresponds the emissivity, data output module is including the wireless module that is used for accomplishing core processor data wireless output, the serial ports output that is used for accomplishing core processor data wired output, the state indication module that is used for the display system state and the real-time clock chip that is used for timely, power module is used for the system circular telegram and with core processor electric connection, wireless module, serial ports output, state indication module and real-time clock chip all with core processor electric connection.

2. The infrared earth surface temperature observation system of claim 1, wherein: the storage module comprises a FLASH memory for storing data, an electrically erasable programmable read-only memory and a random access memory, and the FLASH memory, the electrically erasable programmable read-only memory and the random access memory are electrically connected with the core processor.

3. The infrared earth surface temperature observation system of claim 1, wherein: the image acquisition module is electrically connected with the core processor and adopts a camera to complete acquisition of the images of the underlying surface.

4. The infrared earth surface temperature observation system of claim 1, wherein: the infrared temperature measurement module is electrically connected with the core processor, and an infrared sensor is adopted to complete measurement of the earth surface temperature.

5. The infrared earth surface temperature observation system of claim 1, wherein: the laser ranging module is electrically connected with the core processor, and a laser ranging chip is adopted to measure the distance between the system and the underlying surface.

6. The infrared earth surface temperature observation system of claim 1, wherein: the power supply module adopts a 12V storage battery for power supply, and converts a 12V power supply into a 5V power supply and a 3.3V power supply in sequence through a voltage transformation chip and a power converter respectively to supply power for the core processor, the information acquisition module, the data output module and the storage module.

7. An observation method of an infrared earth surface temperature observation system is characterized in that: the system is initialized after being electrified, then infrared temperature data, picture data and distance data of the underlying surface are collected through an infrared temperature measurement module, an image collection module and a laser ranging module respectively, then the type of the currently collected underlying surface and the corresponding emissivity of the currently collected underlying surface are obtained through identification of the underlying surface picture collected by the image collection module, then the temperature, the distance and the emissivity of the underlying surface are input into a temperature fitting model of a core processor, and finally the corrected infrared temperature value is output by the system.

Background

The surface temperature is one of ground meteorological observation projects, and the main method for measuring the surface temperature in the existing meteorological service is to place a platinum resistance temperature sensor on an underlying surface, wherein the platinum resistance temperature sensor is used for measuring the surface temperature value of a single point of the underlying surface. Furthermore, in the actual measurement, the temperature value can be obtained only by making the temperature sensing part of the platinum resistance temperature sensor fully exchange heat with the measured ground surface to achieve heat balance, so that the measured temperature value has a delay phenomenon, and in the current meteorological ground surface temperature observation, the platinum resistance is limited by the condition thereof, only individual underlying surface types such as bare ground, grassland and the like can be measured in the process of measuring the ground surface temperature, and the temperature of the underlying surface such as water surface, ice surface and the like cannot be measured;

the infrared sensor calculates the temperature value of the measured object by measuring the infrared radiation value emitted by the object, the temperature value does not need to be in direct contact with the earth surface in the measuring process, the distribution of the original temperature field of the measured underlying surface is not influenced, the measuring range is wider, the accuracy and the adaptability are higher, the measured temperature is the surface temperature of the earth surface, the measured value is more symbolic, even if the underlying surface is made of different materials, the measurement can be directly carried out, but in the actual measuring environment, the measuring precision is also easily influenced by external factors, such as the emissivity of the measured earth surface, the distance between a sensor probe and the underlying surface and the like, and therefore, the infrared earth surface temperature observation system and the observation method thereof are provided to solve the problems in the prior art.

Disclosure of Invention

In view of the above problems, the present invention provides an infrared earth surface temperature observation system and an observation method thereof, wherein the system measures earth surface temperature through infrared radiation and corrects correlation factors in the measurement process, so that the infrared temperature value output by the system meets the requirements of meteorological services.

In order to achieve the purpose of the invention, the invention is realized by the following technical scheme: an infrared earth surface temperature observation system comprises a core processor, an information acquisition module, a data output module, a power supply module and a storage module, the information acquisition module comprises a laser ranging module for measuring the distance between the system and the underlying surface, an infrared temperature measurement module for measuring the temperature of the underlying surface and an image acquisition module for identifying the type and the corresponding emissivity of the underlying surface, the data output module comprises a wireless module for completing the wireless output of the data of the core processor, a serial port output for completing the wired output of the data of the core processor, a state indicating module for displaying the state of the system and a real-time clock chip for timely displaying the state of the system, the power supply module is used for powering on the system and electrically connected with the core processor, and the wireless module, the serial port output module, the state indication module and the real-time clock chip are electrically connected with the core processor.

The further improvement lies in that: the storage module comprises a FLASH memory for storing data, an electrically erasable programmable read-only memory and a random access memory, and the FLASH memory, the electrically erasable programmable read-only memory and the random access memory are electrically connected with the core processor.

The further improvement lies in that: the image acquisition module is electrically connected with the core processor and adopts a camera to complete acquisition of the images of the underlying surface.

The further improvement lies in that: the infrared temperature measurement module is electrically connected with the core processor, and an infrared sensor is adopted to complete measurement of the earth surface temperature.

The further improvement lies in that: the laser ranging module is electrically connected with the core processor, and a laser ranging chip is adopted to measure the distance between the system and the underlying surface.

The further improvement lies in that: the power supply module adopts a 12V storage battery for power supply, and converts a 12V power supply into a 5V power supply and a 3.3V power supply in sequence through a voltage transformation chip and a power converter respectively to supply power for the core processor, the information acquisition module, the data output module and the storage module.

The system is initialized after being powered on, then infrared temperature data, picture data and distance data of an underlying surface are collected through an infrared temperature measurement module, an image collection module and a laser ranging module respectively, then the type of the currently collected underlying surface and the corresponding emissivity of the currently collected underlying surface are obtained through identification of an underlying surface picture collected by the image collection module, then the temperature, the distance and the emissivity of the underlying surface are input into a temperature fitting model of a core processor, and finally the system outputs a corrected infrared temperature value.

The invention has the beneficial effects that: compared with the platinum resistance temperature sensor used in the current meteorology, the infrared earth surface temperature observation system of the invention obtains the earth surface temperature by utilizing the infrared radiation calculation sent by the earth surface, does not directly contact with the earth surface, does not influence the temperature field distribution of the earth surface, has more representative measured value and higher accuracy, corrects the influence factor of the infrared temperature measurement process, has more accurate output value, and meets the requirements of meteorology service.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a system block diagram of the present invention;

FIG. 2 is a general block diagram of the system hardware of the present invention;

FIG. 3 is a system workflow diagram of the present invention;

FIG. 4 is a flow chart of infrared sensor calibration according to the present invention;

FIG. 5 is a flow chart of the mat face identification of the present invention;

FIG. 6 is a distance compensation flow chart of the present invention;

FIG. 7 is a flow chart of a temperature fitting model of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example one

Referring to fig. 1 and 2, this embodiment provides an infrared earth surface temperature observation system, which includes a core processor, an information acquisition module, a data output module, a power supply module and a storage module, where the core processor employs an STM32F407 processor, the information acquisition module includes a laser ranging module for measuring a distance between the system and an underlying surface, an infrared temperature measurement module for measuring an underlying surface temperature, and an image acquisition module for identifying an underlying surface type and a corresponding emissivity, the data output module includes a wireless module for completing wireless output of core processor data, a serial port output for completing wired output of core processor data, a state indication module for displaying a system state, and a real-time clock chip for timely powering on the system, and the wireless module, The serial port output module, the state indicating module and the real-time clock chip are electrically connected with the core processor.

The storage module comprises a FLASH memory for storing data, an electrically erasable programmable read-only memory and a random access memory, and the FLASH memory, the electrically erasable programmable read-only memory and the random access memory are electrically connected with the core processor.

The image acquisition module is electrically connected with the core processor, and an OV2640 camera is adopted to complete acquisition of the underlying surface picture.

The infrared temperature measurement module is electrically connected with the core processor, and the surface temperature is measured by adopting a thermopile infrared sensor.

The laser ranging module is electrically connected with the core processor, and a VL53L0X laser ranging chip is adopted to measure the distance between the system and the underlying surface.

The power supply module is powered by a 12V storage battery, and the 12V power supply is sequentially converted into a 5V power supply and a 3.3V power supply through a TPS5430 transformer chip and an AMS1117 power converter respectively to supply power to the core processor, the information acquisition module, the data output module and the storage module.

Referring to fig. 3, in this embodiment, an observation method of an infrared earth surface temperature observation system is further provided, where the system is initialized after being powered on, then infrared temperature data, picture data, and distance data of an underlying surface are collected through an infrared temperature measurement module, an image collection module, and a laser ranging module, then the underlying surface picture collected by the image collection module is identified to obtain a type of the currently collected underlying surface and an emissivity corresponding to the type of the currently collected underlying surface, then the temperature, the distance, and the emissivity of the underlying surface are input into a temperature fitting model of a core processor, and finally the system outputs a corrected infrared temperature value.

Example two

Referring to fig. 4, an infrared sensor is calibrated, a proper blackbody source is selected, a plurality of temperature intervals are divided according to an environment temperature range when the infrared sensor works, the infrared sensor is calibrated by using a traditional contact temperature sensor under a set environment temperature condition, an online instrument is used for recording the temperature of a blackbody measured by the infrared sensor, the temperature of the blackbody measured by a corresponding platinum resistance temperature sensor is obtained, regression analysis is performed on data, and therefore a linear regression equation of relevant output characteristics of the infrared sensor can be obtained, the output characteristics are applied to an actual measurement environment, measurement errors caused by the sensor are reduced, and measurement accuracy is improved;

referring to fig. 5, the identification of the underlying surface is realized according to a flow chart, a large number of images of three underlying surfaces, namely grassland, bare ground and cement ground in a measured area are collected, screened to form a data set, the emissivity corresponding to the measured underlying surface is collected and stored, sample data in the data set is marked, processed and classified, the characteristics of the underlying surface are extracted to obtain a characteristic vector, an underlying surface identification model based on deep learning is built, the characteristic vector is used as the input of a classifier, the underlying surface is classified and identified, the emissivity corresponding to the characteristic vector is obtained according to the identified type of the underlying surface, and the emissivity is revised according to the type of the underlying surface;

referring to fig. 6, distance compensation is performed, according to a temperature range of an underlying surface, based on a calibration environment of an infrared sensor, infrared temperature values of a large number of sensors at the same time at different distances are acquired, the distance from 0 to 100cm is selected to be divided equidistantly by taking 5cm as a base number, the distance is 1cm, 5cm, 10cm., 95cm and 100cm, 21 temperature data are counted, real temperature adopts a temperature value measured by Pt100 under the same condition, different temperatures are set by using the calibration environment, linear fitting is performed on the infrared temperature data, platinum resistance temperature data and distance data, comparison and analysis are performed by using different functions, and finally a polynomial type function with the minimum error after fitting is selected as a fitting function, so that an error-distance compensation formula is calculated, and each measurement can be performed according to the distance between the sensor and a measured object, substituting the infrared temperature into a formula to calculate to obtain a corresponding compensation value, and finally adding the measured infrared temperature and the compensation value to obtain a temperature value after distance compensation.

Referring to fig. 7, an infrared temperature fitting model based on a genetic neural network is built by taking a temperature value measured by a platinum resistor as a standard value, collected infrared temperature values and platinum resistor temperature values are divided into a training set and a testing set after being processed, the distance, emissivity and infrared temperature values are used as input values of the model, the temperature value measured by the platinum resistor is used as an output value of the model, and fitting is carried out on the infrared temperature values.

And finally, the algorithm is transplanted into an STM32F407 processor, and the infrared earth surface temperature observation system outputs the current underlying surface temperature value in real time.

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, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.