CN203772688U - Wireless haze intensity monitoring device based on photoelectric detection technology - Google Patents

Abstract

The utility model relates to a wireless monitoring device for smog intensity based on photoelectric detection technology, which is characterized in that it is composed of a monitoring device and an information module; wherein, the monitoring device includes: a gas chamber main body, a semiconductor laser with a collimating lens, a photoelectric receiver device, the first main control module, and the first data transceiver module; the semiconductor laser with collimating lens is arranged on one inner surface of the main body of the gas chamber, and a photoelectric receiver is arranged on the inner surface of the opposite side, and the photoelectric receiver is connected to The first main control module, the first main control module is connected to the first data transceiver module; the information module includes: the second digital data transceiver module, the second main control module, a display module, and an operation module, and the second digital data transceiver module is connected to the second The main control module and the second main control module are connected to the display module and the operation module. The display module is connected by wireless connection, which realizes the wireless viewing of real-time and on-site smog intensity, and reminds people to take timely protection and travel safety warnings.

Description

A wireless monitoring device for haze intensity based on photoelectric detection technology

technical field

The utility model relates to a wireless monitoring device for smog intensity based on photoelectric detection technology, which belongs to the technical field of ground meteorological monitoring.

Background technique

With the continuous development of the industrialization process, the problem of haze weather has gradually become prominent. In recent years, the smog weather has lasted for a long time, seriously affecting people's production activities. The intensity of smog directly affects people's health and traffic safety. Find the source of smog and control it, remind people in real time to protect in time and provide prerequisites for air purification.

At present, my country mainly uses PM2.5 observation stations and various sensors carried by meteorological satellites to receive and measure information such as visible light, infrared and microwave radiation of the earth and its atmosphere, and the ground station processes and calculates the image signals transmitted by satellites. , to obtain the distribution, intensity and other information of haze. People mainly learn about the intensity of haze in urban areas and broad areas through weather forecasts, and do not specifically involve precise information on the intensity of haze in small-scale areas. Products related to smog monitoring are sold on the market, among which PM2.5 monitors are expensive, and after a long time of use, the measurement accuracy will be reduced due to the adhesion of particulate matter to the instrument.

Contents of the invention

The purpose of the utility model is to overcome the defects of the prior art and provide a wireless monitoring device for haze intensity based on photoelectric detection technology.

In order to achieve the above purpose, the utility model is completed by the following structure: the wireless monitoring device for smog intensity based on photoelectric detection technology is composed of an air chamber main body and an information module;

There are three independent sealed cavities in the main body of the gas chamber, the side cavity of the main body of the gas chamber is the lighting chamber, the upper cavity of the main body of the gas chamber is the sampling gas chamber (3), and the lower cavity of the main body of the gas chamber is the standard gas chamber. chamber (6); the sides of the sampling gas chamber (3) and the side of the standard gas chamber (6) each communicate with the lighting chamber through a light inlet, and each light inlet is equipped with a piece of light-transmitting glass (8),

The side of the lighting room is equipped with a semiconductor laser (1) with a collimating lens, the upper part of the lighting room is equipped with a beam splitter (7), the lower part of the lighting room is equipped with a reflector (10), and the beam splitter (7) is set Behind the light-transmitting glass (8) on the light-incoming side of the sampling gas chamber (3), the reflector (10) is arranged behind the light-transmitting glass (8) on the light-incoming side of the standard air chamber (6),

A suction device (2) is installed on the top of the sampling gas chamber (3), and the suction device (2) communicates with the sampling gas chamber (3), and a sampling gas outlet (4) is arranged on the bottom side of the sampling gas chamber (3). ) and a photoelectric receiver (5), the inside left and right sides of the sampling gas chamber (3) are equipped with coated plane reflectors (12),

The sides of the standard air chamber (6) communicate with the lighting chamber through a light-transmitting glass (8) at the light inlet. The left and right sides of the standard air chamber (6) are equipped with coated flat mirrors (12). (6) A photoelectric receiver (5) is installed on the inside of the bottom inside;

The photoelectric receiver (5) is connected to the first main control module, and the first main control module is connected to the first data transceiver module;

The information module is composed of a second data transceiver module, a second main control module, a display module and an operation module, the second data transceiver module is connected with the second main control module, and the second main control module is connected with the display module and the operation module, The display module has a display and wireless connection; the information module is installed in the gap of the lighting room;

Reflector parallelism controller (9) is installed between sampling gas chamber (3) and standard gas chamber (6) right side coating plane reflector (12) and the position between the main body gas chamber right side plate. the

The photoelectric receiver (5), the mirror parallelism controller (9), the semiconductor laser with collimating lens (1) and the information module are connected with the electric source through wires.

The coated plane reflector (12) is an aluminized plane reflector, and the surface of the aluminized plane reflector is coated with a layer of titanium dioxide with a smooth, continuous surface and uniform and dense particles.

The mirror parallelism controller (9) is a driver made through the inverse piezoelectric effect of piezoelectric ceramic materials.

The suction device (2) has left and right side openings.

A semiconductor laser (1) with a collimating lens can generate infrared laser light.

The display module receives data through the connected information module data transceiver module, controls and displays the current corresponding smog intensity through the single-chip microcomputer, and the display module has a wireless receiving function and a display function at the same time.

Purified standard dry air is housed in the standard air chamber (6).

Four damping devices (11) are installed on the outer bottom of the main body of the air chamber.

The utility model has the advantages of stable work, fast, convenient, accurate, real-time and on-the-spot monitoring of haze intensity, low cost, wide distribution of monitoring areas, and wide application in meteorological monitoring and people's lives. the

Description of drawings

Figure 1 is a schematic diagram of the structure of the main gas chamber of the wireless monitoring device for haze intensity based on photoelectric detection technology of the utility model.

Figure 2 is a light route diagram inside the gas main chamber of the wireless monitoring device for haze intensity based on the photoelectric detection technology of the utility model.

Figure 3 is a schematic block diagram of the connection relationship of various components of the wireless monitoring device for haze intensity based on photoelectric detection technology of the present invention.

Among them: 1- semiconductor laser with collimating lens, 2- suction device, 3- sampling gas chamber, 4- sampling gas outlet, 5- photoelectric receiver, 6- standard gas chamber, 7- beam splitter, 8- Transparent glass, 9-mirror parallelism controller, 10-reflector, 11-shock absorbing device, 12-coated plane reflector.

Detailed ways

The utility model is based on the photoelectric detection technology, and the haze intensity wireless monitoring device is composed of an air chamber main body and an information module;

There are three independent sealed cavities in the main body of the air chamber, the side cavity of the main body of the air chamber is the lighting chamber, the upper cavity of the main body of the air chamber is the sampling air chamber 3, and the lower cavity of the main body of the air chamber is the standard air chamber 6 3 side parts of the sampling gas chamber and 6 side parts of the standard gas chamber respectively communicate with the lighting chamber through a light inlet, and each light inlet is respectively equipped with a piece of light-transmitting glass 8,

The side of the lighting room is equipped with a semiconductor laser 1 with a collimating lens, the upper part of the lighting room is equipped with a beam splitter 7, and the lower part of the lighting room is equipped with a reflector 10, and the beam splitter 7 is installed on the light-incoming side of the sampling gas chamber 3 behind the light-transmitting glass 8, the reflecting mirror 10 is located behind the light-transmitting glass 8 on the light-incoming side of the standard gas chamber 6,

The top of the sampling gas chamber 3 is provided with an aspirating device 2, which communicates with the sampling gas chamber 3, and the bottom side of the sampling gas chamber 3 is provided with a sampling gas outlet 4 and a photoelectric receiver 5, the sampling gas chamber The inside left and right sides of 3 are equipped with coated flat reflector 12,

The sides of the standard gas chamber 6 communicate with the lighting chamber through a light-transmitting glass 8 light inlet. The left and right sides of the standard gas chamber 6 are equipped with coated plane reflectors 12, and the inside of the bottom of the standard gas chamber 6 is equipped with a Photoelectric receiver 5;

The photoelectric receiver 5 is connected to the first main control module, and the first main control module is connected to the first data transceiver module;

The information module is composed of a second data transceiver module, a second main control module, a display module and an operation module, the second data transceiver module is connected with the second main control module, and the second main control module is connected with the display module and the operation module, The display module has a display and wireless connection; the information module is installed in the gap of the lighting room;

The reflector parallelism controller 9 is installed between the back of the coated plane reflector 12 on the right side of the sample gas chamber 3 and the standard gas chamber 6 and the right side plate of the main body gas chamber. the

The photoelectric receiver 5, mirror parallelism controller 9, semiconductor laser with collimating lens) and information module are connected with the electric source through wires.

The monitoring device mainly includes semiconductor laser 1 with collimating lens, gas chamber main body, photoelectric receiver 5, amplification and shaping, A/D conversion, main control module, data transceiver module, mirror parallelism controller 9; the information module includes: Data transceiver module, main control module, display module and operation module;

Four damping devices 11 are installed at the outer bottom of the main body of the air chamber to prevent vibration from affecting the working accuracy of the monitoring device.

The main body of the air chamber mainly includes: a standard air chamber 6 and a sampling air chamber 3;

The standard air chamber 6 is equipped with purified standard dry air. The functions of the standard air chamber 6 are as follows: one is to effectively suppress the monitoring error caused by the laser output power fluctuation caused by the semiconductor laser with collimating lens heating after a long working time. Second, it can weaken the monitoring error caused by the absorption of light in the same composition of the sampled air mass and standard air.

The haze air mass collected during work enters the sampling air chamber 3 through the openings on the left and right sides of the suction device 2 in real time, and enters the sampling air chamber 3 evenly after being buffered by the air flow, which is conducive to the uniform distribution of the collected haze air mass samples in the sampling air chamber In 3, the more evenly distributed the collected haze air mass is, the more conducive to improving the accuracy of the detection data, and finally the collected haze air mass flows out through the outlet of the sampling gas outlet 4.

Both sides of the inner walls of the sampling gas chamber 3 and the standard gas chamber 6 are equipped with coated plane reflectors (aluminized film plane reflectors) 12, the purpose of which is to increase the reflectivity of the infrared laser reflected by the reflector 10 and reduce the impact of the infrared laser on the sampling gas chamber. 3 and losses in the standard cell 6.

Among them, the aluminum-coated plane reflector 12 will generate a thin layer of aluminum oxide film in the main body of the gas chamber due to the unprotected aluminum film surface, resulting in a rapid decline in its reflectivity over time. Therefore, a layer of titanium dioxide with flat, continuous, uniform and dense particles is added outside the aluminum film to play a protective role;

A semiconductor laser 1 with a collimating lens can generate infrared laser light.

Smog includes fog and haze, and its main components are water, sulfur dioxide, nitrogen oxides and inhalable particulate matter, and its main components are concentrated in the peak absorption line region of the infrared wavelength range;

Wherein the infrared laser forms a beam of light after passing through the collimating lens, and then passes through the beam splitter 7 to obtain two paths of light with the same light intensity;

One path of light enters the sampling gas chamber 3 through the light-transmitting glass 8 of the sampling gas chamber 3;

Wherein another road light enters in the standard gas chamber 6 through the light-transmitting glass 8 of the standard gas chamber 6 after passing through the reflector 10;

The two paths of light are respectively reflected and refracted multiple times in the standard gas chamber 6 and the sampling gas chamber 3, and finally irradiated on the photoelectric receiver 5 corresponding to the light in each gas chamber; The working light takes the same geometric path in the two air chambers.

If the haze intensity changes, the light emitted by the light source is increased by the absorption and reflection of the haze particles, and the light intensity reaching the photoelectric receiver 5 will also change, resulting in a change in the strength of the photodetector output signal;

Described photodetector is the photodiode that adopts photoelectric sensor to work in linear range;

Among them, the photodetector detects the change of the light intensity it receives, and converts the change of the light intensity into the change of the electrical signal; then the signal is amplified and shaped, A/D converted, and sent to the single-chip microcomputer of the main control module for data processing;

The obtained data processing result is to obtain Q from the difference between the electrical signal D2 of the standard gas chamber 6 and the electrical signal D1 of the sampling gas chamber 3, that is, D2-D1=Q, and it can be known that Q≥0, and the Q value is linearly related to the haze intensity;

The A/D conversion is composed of a conversion circuit with the ADC0804 chip as the core;

The main control module is the minimum system configuration with STC12C5A60S2 single-chip microcomputer as the core;

The data transceiver module is a transceiver circuit with SI4432 as the core. The SI4432 wireless transceiver chip is small in size, low in power consumption, works in the 240-960MHZ frequency range, and has the advantages of a maximum output power of up to +20DBm, which meets the requirements of the module. Miniaturization, low power consumption, and strong transmission performance requirements;

The display module is that the data transceiver module of the information module receives data, controls and displays the smog intensity corresponding to the current Q value by a single-chip microcomputer, and realizes wireless reception and display functions;

The mirror parallelism controller 9 is a driver made by the inverse piezoelectric effect of piezoelectric ceramic material. Using its advantages of high precision, fast response speed, and high displacement resolution to adjust the parallelism of the coated plane reflector 12 solves the problem caused by the change of the parallelism of the coated plane reflector 12 caused by the deformation of the main gas chamber caused by temperature changes Monitoring error issues;

The control module is: the control signal is sent to the monitoring device wirelessly through the transceiver module of the information module, and the single-chip microcomputer of the monitoring device controls the mirror parallelism controller 9, that is, changes the voltage of the driving circuit of the piezoelectric ceramic to achieve precise control of reflection Mirror 10 surface angle and precision adjustment coating plane mirror 12.

As shown in Figure 3, the functional block diagram of each module of the smog intensity wireless monitoring device based on photoelectric detection technology, the monitoring device with the shock absorber 11 is placed in the smog monitored area;

As shown in Figure 1, the exterior view of the gas main room of the haze intensity wireless monitoring device based on photoelectric detection technology, after the collected haze air mass samples pass through the suction device 2, after being buffered and evenly filled with the sampling gas chamber 3, they are discharged from the sampling gas outlet 4 go out;

  As shown in Figure 2, the light route map inside the gas main chamber of the haze intensity wireless monitoring device based on photoelectric detection technology. The laser light emitted by the semiconductor laser 1 with a collimator lens passes through the beam splitter 7 to obtain two laser beams, one of which enters the sampling gas chamber 3 through the transparent glass 8, and the other enters the standard through the transparent glass 8 after passing through the reflector. Air chamber 6;

The laser light is irradiated on the photoelectric receiver 5 after multiple reflections between the two air chamber coating plane mirrors 12 respectively;

The light intensity signal sensed by the photoelectric receiver 5 is converted into an electrical signal, and the sampling output D1 and the standard output signal D2 are obtained through amplification and shaping, A/D conversion, and data processing, and the value Q is obtained by the difference between D2 and D1, namely: D2 -D1=Q, the Q value obtained by real-time monitoring;

The data is sent out through the data transceiver module of the monitoring device, the data transceiver module of the information module receives the data, and the display module is controlled by a single-chip microcomputer to display the smog intensity information corresponding to the current Q value; 

The information module or information screen can be carried with you, and you can wirelessly view the real-time and on-site understanding of the local smog intensity, reminding people to take precautions and travel safety warnings in time. Environmental protection departments or environmental protection volunteers can also use real-time and on-site smog intensity information to Adopt an environmental protection plan for purification treatment that is suitable for the site;

The mirror parallelism controller 9 is controlled wirelessly by the control module to achieve precision adjustment of the parallelism of the coated plane mirror 12.

Claims (8)

1. A kind of haze intensity wireless monitoring device based on photoelectric detection technology, it is characterized in that the haze intensity wireless monitoring device is made up of air chamber main body and information module; There are three independent sealed cavities in the main body of the gas chamber, the side cavity of the main body of the gas chamber is the lighting chamber, the upper cavity of the main body of the gas chamber is the sampling gas chamber (3), and the lower cavity of the main body of the gas chamber is the standard gas chamber. chamber (6); the sides of the sampling gas chamber (3) and the side of the standard gas chamber (6) each communicate with the lighting chamber through a light inlet, and each light inlet is equipped with a piece of light-transmitting glass (8), The side of the lighting room is equipped with a semiconductor laser (1) with a collimating lens, the upper part of the lighting room is equipped with a beam splitter (7), the lower part of the lighting room is equipped with a reflector (10), and the beam splitter (7) is set Behind the light-transmitting glass (8) on the light-incoming side of the sampling gas chamber (3), the reflector (10) is arranged behind the light-transmitting glass (8) on the light-incoming side of the standard air chamber (6), A suction device (2) is installed on the top of the sampling gas chamber (3), and the suction device (2) communicates with the sampling gas chamber (3), and a sampling gas outlet (4) is arranged on the bottom side of the sampling gas chamber (3). ) and a photoelectric receiver (5), the inside left and right sides of the sampling gas chamber (3) are equipped with coated plane reflectors (12), The sides of the standard air chamber (6) communicate with the lighting chamber through a light-transmitting glass (8) at the light inlet. The left and right sides of the standard air chamber (6) are equipped with coated flat mirrors (12). (6) A photoelectric receiver (5) is installed on the inside of the bottom inside; The photoelectric receiver (5) is connected to the first main control module, and the first main control module is connected to the first data transceiver module; The information module is composed of a second data transceiver module, a second main control module, a display module and an operation module, the second data transceiver module is connected with the second main control module, and the second main control module is connected with the display module and the operation module, The display module has a display and wireless connection; the information module can be installed in the gap of the lighting room; The reflector parallelism controller (9) is installed between the back of the coated plane reflector (12) on the right side of the sampling gas chamber (3) and the standard gas chamber (6) and the right side plate of the main gas chamber; The photoelectric receiver (5), the mirror parallelism controller (9), the semiconductor laser with collimating lens (1) and the information module are connected with the electric source through wires. 2. the haze intensity wireless monitoring device based on photoelectric detection technology according to claim 1, it is characterized in that described coating plane reflector (12) is aluminized film plane reflector, and the surface of aluminized film plane reflector is coated with a The surface of the layer is flat, continuous and the particles are uniform and dense titanium dioxide. 3. the haze intensity wireless monitoring device based on photoelectric detection technology according to claim 1, is characterized in that said mirror parallelism controller (9) is the driver made by the inverse piezoelectric effect of piezoelectric ceramic material . 4. The haze intensity wireless monitoring device based on photoelectric detection technology according to claim 1, characterized in that the suction device (2) has two side openings, left and right. 5. the haze intensity wireless monitoring device based on photoelectric detection technology according to claim 2, is characterized in that the semiconductor laser (1) with collimating lens can produce infrared laser. 6. the haze intensity wireless monitoring device based on photoelectric detection technology according to claim 1, is characterized in that described display module receives data through the connected information module data transceiver module, controls and displays current corresponding haze by single-chip microcomputer control Intensity, the display module has wireless receiving function and display function at the same time. 7. The haze intensity wireless monitoring device based on photoelectric detection technology according to claim 1, characterized in that purified standard dry air is housed in the standard air chamber (6). 8. The wireless haze intensity monitoring device based on photoelectric detection technology according to claim 1, characterized in that four damping devices (11) are installed on the outer bottom of the main body of the air chamber.