1. A continuous stable and environmental parameter adjustable circulating dust device, characterized by that, the device includes: the dust mixing environment bin comprises a dust mixing environment bin, a dust concentration detection connecting port, an adjustable fan, a dust injection port, a dust collection port and an air supply port;

the dust injection port, the dust collection port and the air supply port are respectively arranged at the top, the bottom and the upper part of the side surface of the dust mixing environment bin; the method comprises the following steps of; the input end of the adjustable fan is connected with the dust collection port, and the output end of the adjustable fan is connected with the air supply port; the dust concentration detection connecting port is used for connecting a dust concentration sensor, so that a closed space is formed by the dust concentration detection connecting port and the whole dust circulating device.

2. A continuous stable and environmental parameter adjustable circulating dust test system, characterized in that, this system includes: the dust mixing environment bin comprises a dust mixing environment bin, a dust concentration detection connecting port, an environment adjusting device, a dust injection port, a dust collection port, an air supply port and a humidifying port; the environment adjusting device comprises a heater, an adjustable fan and a humidifier;

the dust injection port and the dust collection port are respectively arranged at the top and the bottom of the dust mixing environment bin, and the air supply port and the humidifying port are both arranged at the upper part of the side surface of the dust mixing environment bin; one end of the heater is connected to the dust collecting port, and the other end of the heater is connected with the input end of the adjustable fan; the output end of the adjustable fan is connected with the air supply outlet; the humidifier is connected with the humidifying port;

the dust concentration detection connecting port is used for connecting a dust concentration sensor to form a closed space with the whole dust test system;

the heater, the adjustable fan and the humidifier are respectively used for changing the temperature, the wind speed and the humidity of the internal environment of the whole test system.

3. The cyclic dust testing system of claim 2, further comprising: the system comprises an environment detection device and an upper computer; the environment detection device comprises a temperature sensor, a humidity sensor and an air speed sensor which are all arranged on the side part of the dust mixing environment bin; the upper computer is respectively connected with a temperature sensor, a humidity sensor, an air speed sensor, a heater, an adjustable fan and a humidifier;

the upper computer combines the requirements of different tests on system environmental conditions through the internal temperature, the wind speed and the humidity of the dust mixing environment bin acquired from the environment detection device, and correspondingly adjusts the environment adjusting device.

4. The circulating dust test system according to claim 2 or 3, wherein the dust collecting port and the dust concentration detection connecting port are arranged in a serial or parallel manner; when the two are connected in parallel, a valve is arranged at the corresponding port.

5. A circulating dust test system as claimed in claim 2 or 3, which can detect whether the dust concentration sensor is acceptable, or calibrate the accuracy of the dust concentration sensor, or simulate ageing tests of the dust concentration sensor.

6. A circulating dust test system according to claim 2 or 3, characterized in that the system is used for simulating the aging test of the dust concentration sensor, and comprises the following steps:

s1: weighing the dust with the mass m by a scale, and calculating the dust concentration c of the environmental chamber₀；

S2: adding the dust weighed in the step 1 into a dust mixing environment bin through a dust injection port;

s3: installing a dust concentration sensor to be detected;

s4: the upper computer sets parameters of wind speed, temperature and humidity to enable the environment in the dust mixing environment bin to tend to be stable;

s5: recording the detection value c of the dust concentration sensor₁And is combined with c₀Comparing and calculating the test error of the dust concentration sensor to be testedAnd fluctuation, so as to judge whether the dust concentration sensor to be detected is qualified;

s6: when the dust concentration sensor to be detected is qualified, changing environmental parameters;

s7: recording detection value c of dust concentration sensor to be detected₂And is combined with c₀And comparing, and calculating the test error and the fluctuation of the to-be-tested dust concentration sensor so as to judge the anti-interference performance of the to-be-tested dust concentration sensor.

Background

The dust sensor is generally applied to operation places with serious dust pollution in various industries such as coal mines, iron ores and buildings, and the dust concentration sensor needs to be constantly and regularly verified or calibrated in the research, development, production and use processes so as to ensure the test precision of the dust sensor; on the other hand, in the process of research and development of the dust sensor, the influence of environmental parameters on the monitoring precision of the dust sensor needs to be researched, a stable and continuous dust environment is needed, and the environmental parameters are adjustable and measurable.

Present dust concentration sensor calibrating device is continuous stable dust environment only, but the volume is general big (length 15 ~ 20m), the cost is high, is unfavorable for general popularization and application. And the environmental parameters in the testing device are the same as the parameters of the external environment and cannot be adjusted.

Therefore, the existing calibration device for the dust concentration sensor has the problems of large volume, high manufacturing cost and nonadjustable environmental parameters, and needs a continuous and stable circulating dust device with adjustable environmental parameters and a test system.

Disclosure of Invention

In view of this, the present invention provides a continuous and stable dust circulation device and a testing system with adjustable environmental parameters, which miniaturize a dust concentration sensor calibration device, reduce cost, and make environmental parameters adjustable and measurable, and can be widely popularized to users of dust sensors, thereby facilitating real-time calibration of dust sensors and ensuring the testing accuracy of dust sensors.

In order to achieve the purpose, the invention provides the following two technical schemes:

the first technical scheme is as follows: a continuous stable and environmental parameter adjustable circulating dust apparatus comprising: the dust mixing environment bin comprises a dust mixing environment bin, a dust concentration detection connecting port, an adjustable fan, a dust injection port, a dust collection port and an air supply port;

the dust injection port, the dust collection port and the air supply port are respectively arranged at the top, the bottom and the upper part of the side surface of the dust mixing environment bin; the method comprises the following steps of; the input end of the adjustable fan is connected with the dust collection port through a circulating branch pipe, and the output end of the adjustable fan is connected with the air supply port through a circulating air pipe; the dust concentration detection connecting port is used for connecting a dust concentration sensor, so that a closed space is formed by the dust concentration detection connecting port and the whole dust circulating device.

The second technical scheme is as follows: a continuous stable and environmental parameter adjustable circulating dust test system, includes: the dust mixing environment bin comprises a dust mixing environment bin, a dust concentration detection connecting port, an environment adjusting device, a dust injection port, a dust collection port, an air supply port and a humidifying port; the environment adjusting device comprises a heater, an adjustable fan and a humidifier;

the dust injection port and the dust collection port are respectively arranged at the top and the bottom of the dust mixing environment bin, and the air supply port and the humidifying port are both arranged at the upper part of the side surface of the dust mixing environment bin; one end of the heater is connected to the dust collecting port, and the other end of the heater is connected with the input end of the adjustable fan; the output end of the adjustable fan is connected with the air supply outlet; the humidifier is connected with the humidifying port;

the dust concentration detection connecting port is used for connecting a dust concentration sensor to form a closed space with the whole dust test system;

the heater, the adjustable fan and the humidifier are respectively used for changing the temperature, the wind speed and the humidity of the internal environment of the whole test system.

Further, the system further comprises: the system comprises an environment detection device and an upper computer; the environment detection device comprises a temperature sensor, a humidity sensor and an air speed sensor which are all arranged on the side part of the dust mixing environment bin; the upper computer is respectively connected with a temperature sensor, a humidity sensor, an air speed sensor, a heater, an adjustable fan and a humidifier;

the upper computer combines the requirements of different tests on system environmental conditions through the internal temperature, the wind speed and the humidity of the dust mixing environment bin acquired from the environment detection device, and correspondingly adjusts the environment adjusting device.

Further, the dust collecting port and the dust concentration detection connecting port are arranged in a serial or parallel mode; when the two are connected in parallel, a valve is arranged at the corresponding port.

Further, the test system can detect whether the dust concentration sensor is qualified or not, or calibrate the accuracy of the dust concentration sensor, or simulate the aging test of the dust concentration sensor.

Further, the aging test of the dust concentration sensor is simulated by using the system, and the method specifically comprises the following steps:

s1: weighing the dust with the mass m by a scale, and calculating the dust concentration c of the environmental chamber₀；

S2: adding the dust weighed in the step 1 into a dust mixing environment bin through a dust injection port;

s3: installing a dust concentration sensor to be detected;

s4: the upper computer sets parameters of wind speed, temperature and humidity to enable the environment in the dust mixing environment bin to tend to be stable;

s5: recording the detection value c of the dust concentration sensor₁And is combined with c₀Sensor for comparing and calculating dust concentration to be measuredSo as to judge whether the dust concentration sensor to be tested is qualified or not;

s6: when the dust concentration sensor to be detected is qualified, changing environmental parameters;

s7: recording detection value c of dust concentration sensor to be detected₂And is combined with c₀And comparing, and calculating the test error and the fluctuation of the to-be-tested dust concentration sensor so as to judge the anti-interference performance of the to-be-tested dust concentration sensor.

The invention has the beneficial effects that:

1) the dust device of the invention is recyclable and miniaturized, the dust can circularly flow in the pipeline, and the device is stable, small in volume and convenient to use.

2) The environmental parameters in the dust device are adjustable and measurable, the environmental parameters of the dust particles such as temperature, humidity, flow velocity, water content and the like are adjustable and measurable, the test data of the sensors of all the parameters are transmitted to the control center, and then the related equipment of all the parameters is adjusted according to the test requirements, so that the dust environment meets the test requirements.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.

Drawings

For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic plan view of a continuous, stable and environmental parameter adjustable dust recycling apparatus according to the present invention;

FIG. 2 is a schematic view of the whole dust recycling apparatus of the present invention with continuous stability and adjustable environmental parameters;

FIG. 3 is a schematic diagram of the control of the continuous stable circulating dust test system with adjustable environmental parameters;

FIG. 4 is a flowchart of an aging experiment of the dust recycling apparatus of the present invention with continuous stability and adjustable environmental parameters.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.

Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.

Referring to fig. 1 to 4, fig. 1 to 2 show a continuous stable circulating dust device with adjustable environmental parameters, which includes: the dust mixing device comprises a dust mixing environment bin, a dust concentration detection connecting port, an environment adjusting device, an environment detecting device, an upper computer, a dust injection port, a dust collection port, an air supply port and a humidifying port. Wherein, environment adjusting device includes heater, adjustable fan and humidifier. The environment detection device comprises a temperature sensor, a humidity sensor and an air speed sensor which are all arranged on the side part of the dust mixing environment bin. The upper computer is respectively connected with the temperature sensor, the humidity sensor, the air speed sensor, the heater, the adjustable fan and the humidifier. The dust injection port and the dust collection port are respectively arranged at the top and the bottom of the dust mixing environment bin; the air supply outlet and the humidifying outlet are both arranged above the side surface of the dust mixing environment bin; one end of the heater is connected to the dust collecting port, and the other end of the heater is connected with the input end of the adjustable fan; the output end of the adjustable fan is connected with the air supply outlet; the humidifier is connected with the humidifying port.

The dust concentration detection connecting port is used for connecting a dust concentration sensor, so that a closed space is formed by the dust concentration detection connecting port and the whole dust test system. The heater, the adjustable fan and the humidifier are respectively used for changing the temperature, the wind speed and the humidity of the internal environment of the whole test system. The upper computer combines the requirements of different tests on the environmental conditions of the system through the temperature, the wind speed and the humidity in the dust mixing environment bin acquired from the environment detection device, and correspondingly adjusts the environment adjusting device.

The dust circulating device is compact in structure, the volume of the dust circulating device is not more than 1m 2.5m, the dust circulating device can be used as experimental equipment for calibration and aging of a dust sensor, and relevant experiments of the equipment under different dust environments and continuous and stable dust environments can be realized.

The device can accurately evaluate the accuracy and stability of the detection result of the dust sensor, and can judge the adaptability of the dust sensor to severe environment and the capacity of resisting the interference of external environmental factors. As shown in fig. 4, the specific test method of the device is as follows:

s1: weighing the dust with the mass m by a scale, and calculating the dust concentration c of the environmental chamber₀；

S2: adding the dust weighed in the step 1 into a dust mixing environment bin through a dust injection port;

s3: installing a dust concentration sensor to be detected;

s4: the upper computer sets parameters of wind speed, temperature and humidity to enable the environment in the dust mixing environment bin to tend to be stable;

s5: recording the detection value c of the dust concentration sensor₁And is combined with c₀Comparing, and calculating the test error and the volatility of the to-be-tested dust concentration sensor so as to judge whether the to-be-tested dust concentration sensor is qualified; (error 15% or less is acceptable)

S6: when the dust concentration sensor to be detected is qualified, changing environmental parameters;

s7: recording detection value c of dust concentration sensor to be detected₂And is combined with c₀And (4) comparing, calculating the test error and the fluctuation of the to-be-tested dust concentration sensor, and judging the anti-interference performance of the to-be-tested dust concentration sensor (the anti-interference performance is better if the error is less than or equal to 15%).

As shown in fig. 3, the data processing performed by the upper computer includes:

1) testing the detection precision and stability of the dust concentration sensor to be tested;

2) testing the mathematical relation between the detection value of the dust sensor and the wind speed, the temperature and the humidity;

3) the capability of the dust sensor for resisting external influence factors (temperature, humidity and wind speed) is tested, and the capability of the dust sensor for adapting to severe environment is an important index.

The device provided by the invention has the advantages that the calibration device of the dust concentration sensor is miniaturized, the cost is low, the device can be generally popularized, the environmental parameters comprise temperature, humidity and wind speed, the adjustment can be realized, and the test result can be transmitted to the control center of the test system. The calibration device for the dust concentration sensor is miniaturized and integrated, and parameters can be adjusted and measured.

Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.