Rural environment detection method based on air pressure sensor

Abstract

The invention provides a country environment detection method based on an air pressure sensor. The country environment detection method comprises the following steps of air pressure detection, judgment of factors of current air pressure fluctuation, sulfur dioxide and sulfur trioxide detection, air pressure sensor protection, data recording and early warning. According to the invention, the atmospheric pressure sensor is arranged to monitor atmospheric pressure near a rural area factory, reasons for abnormal fluctuation of the atmospheric pressure are analyzed, air is detected through sodium hydroxide solids in the detection box, a product of sodium hydroxide reaction is detected through the raindrop sensor, and the detection result is accurate. The air pressure sensor can be controlled to be closed to protect the air pressure sensor after the sulfur dioxide and the sulfur trioxide are detected, and the situation that the service life of the air pressure sensor is shortened due to the fact that the air pressure sensor is in contact with acid gas is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of rural environment detection, and in particular to a rural environment detection method based on an air pressure sensor. Background Art

[0002] Environmental testing is to design an environmental testing network using GIS technology. The information collected by environmental testing can be stored and displayed in a timely manner through GIS, and detailed site monitoring and analysis can be carried out on the selected evaluation area. The process of environmental testing is generally to accept tasks, conduct on-site investigations and collect information, design testing plans, optimize site layout, sample collection, sample transportation and storage, sample pretreatment, analysis and testing, data processing, comprehensive evaluation, etc. Objects of environmental testing: natural factors, human factors, and pollution components. Environmental testing includes: chemical monitoring, physical monitoring, biological monitoring, and ecological monitoring;

[0003] Publication number "CN113358818A" provides an industrial waste gas detection method, including a bottom plate, a waste gas treatment device is fixedly installed on the top side of the bottom plate, a waste gas pipe and an access pipe are fixedly installed on both sides of the waste gas treatment device, a detection box is fixedly installed on one side of the waste gas pipe, and sampling tubes are fixedly installed on both sides of the detection box. This method discharges the sample gas back into the waste gas pipe through another sampling tube, so that the industrial waste gas can be detected in real time without periodic repeated detection. It is easy to use and can avoid the gap between two detections. The industrial waste gas does not meet the standards and is discharged to cause air pollution;

[0004] However, the above solutions and the prior art still have the following problems:

[0005] In some remote rural areas, due to insufficient supervision, some factories have the phenomenon of secretly discharging exhaust gas. Therefore, gas monitoring devices are currently installed around these factories to achieve the purpose of monitoring. However, some factories may interfere with the monitoring devices. In addition, since the exhaust gas is mixed with acidic gases such as sulfur dioxide and sulfur trioxide, these gases will corrode some electrochemical sensors in the monitoring device, thereby reducing the overall service life of the monitoring device. If special sensors are used to monitor sulfur dioxide and sulfur trioxide, two sensors need to be installed at the same time, which increases the monitoring cost. In addition, when factories secretly discharge exhaust gas, they will dilute the exhaust gas and make it difficult for the sensor to obtain monitoring results. Summary of the invention

[0006] The object of the present invention is to provide a rural environment detection method based on an air pressure sensor to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A rural environment detection method based on an air pressure sensor comprises the following steps:

[0009] S1. Air pressure detection: detect whether there is an air pressure change based on air fluctuations. If there is an air pressure change, it is necessary to further determine the factors causing the air pressure change.

[0010] S2. Determine the factors causing the current air pressure fluctuations, and determine whether the current air pressure change is caused by exhaust gas emissions or natural wind. If it is caused by exhaust gas emissions, it is necessary to further detect whether the exhaust gas contains sulfur dioxide and sulfur trioxide;

[0011] S3, sulfur dioxide and sulfur trioxide detection, use the detection box to detect whether the exhaust gas contains sulfur dioxide and sulfur trioxide;

[0012] S4, air pressure sensor protection: after sulfur dioxide and sulfur trioxide are detected, the air pressure sensor is sealed and protected by a protective device to prevent the air pressure sensor from being exposed to acidic gas for a long time, which may reduce its service life.

[0013] S5. Data recording: the recording unit in the control box records the duration of sensing sulfur dioxide and sulfur trioxide;

[0014] S6, early warning, the control unit in the control box sends out an alarm through the alarm to remind the factory to stop the continued emission of waste gas, and promptly send a notice to the management department, and at the same time generate corresponding paper records to record the time point and duration of the current waste gas emission.

[0015] Preferably, the detecting whether there is a current air pressure change according to air fluctuations specifically includes:

[0016] Open the electric door and expose the air pressure sensor to the air to detect the current air pressure. Set the normal air pressure change range according to the weather of the day. If the air pressure exceeds this range, it is determined that external factors have caused the air pressure to change.

[0017] Preferably, the determining whether the current air pressure change is caused by exhaust gas emissions or natural wind specifically includes:

[0018] S101, air enters the pipeline and contacts the solid sodium hydroxide placed on the surface of the orifice plate;

[0019] S102: Whether the raindrop sensor receives a water drop signal;

[0020] S103: If the raindrop sensor continuously receives water drop signals within a period of time, it is determined that exhaust gas is mixed in the air; otherwise, it is determined that natural wind has blown during the period of time, causing the current air pressure to change.

[0021] Preferably, the acid gas detection device is used to detect whether the exhaust gas contains sulfur dioxide and sulfur trioxide, specifically including:

[0022] Since a small amount of sulfur dioxide and sulfur trioxide will produce water and release heat when in contact with sodium hydroxide, when the raindrop sensor detects water droplets dripping from the orifice plate and the temperature sensor detects a certain temperature increase, it can be determined that sulfur dioxide and sulfur trioxide are mixed in the current exhaust gas.

[0023] Preferably, after the sulfur dioxide and sulfur trioxide are detected, the air pressure sensor is sealed and protected by a protective device, which specifically includes:

[0024] The protection device is a shell, and a control box fixedly arranged on the shell controls the electric door to close, so that the electric door protects the air pressure sensor inside the shell. At the same time, the control box controls the motor to start, and the motor drives the substrate on which the air pressure sensor is installed to flip as a whole inside the shell, thereby isolating the air pressure sensor from the outside world.

[0025] Preferably, the recording unit in the control box records the duration of sensing sulfur dioxide and sulfur trioxide, specifically including:

[0026] The control box is provided with a recording unit, which records the signal duration of the raindrop sensor. The water droplets on the surface of the raindrop sensor will slide through the inclined surface at the bottom of the detection box to the vicinity of the absorbent sponge and be absorbed by it. The signal duration is from the first time the raindrop sensor detects water droplets to the time when the raindrop sensor no longer has signal changes.

[0027] Preferably, the control unit in the control box issues an alarm through an alarm, sends a notification to relevant departments, and generates corresponding paper records, specifically including:

[0028] The control box is provided with a control unit. When receiving the signal from the raindrop sensor, the control unit reports the exhaust gas emission situation to the relevant departments through the wireless transmission unit, activates the alarm to warn the factory, and displays the relevant content on the display screen through the printing unit for the staff to print the content certificate from the printing port.

[0029] Preferably, a top plate is installed on the surface of the pipe through a support rod, and the surface of the top plate is set to a conical structure. The top plate is used to direct rainwater to the vicinity of the pipe on rainy days to prevent rainwater from entering the pipe and interfering with the detection results of the raindrop sensor.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. The present invention monitors the atmospheric pressure near the factory in the rural area by setting an air pressure sensor, analyzes the reasons for the abnormal fluctuation of the atmospheric pressure, and detects the air through the sodium hydroxide solid inside the detection box, and detects the product of the sodium hydroxide reaction through the setting of the raindrop sensor, thereby judging whether the air contains sulfur dioxide and sulfur trioxide, and thus judging whether the current factory has the phenomenon of secretly discharging exhaust gas, and after detecting sulfur dioxide and sulfur trioxide, the electric door can be controlled to close to protect the air pressure sensor, so as to prevent the air pressure sensor from contacting with acidic gas and thus reducing its service life;

[0032] 2. The present invention sets a detection box inside the shell. The setting of the detection box can prevent sodium hydroxide solid from being exposed to the air. If there is a small amount of sulfur dioxide and sulfur trioxide in the air due to the secret discharge of exhaust gas, these two acidic gases will react with the sodium hydroxide solid to generate water, and the water is detected by the raindrop sensor, so as to achieve the purpose of detecting sulfur dioxide and sulfur trioxide at the same time. There is no need to install a special acid gas sensor for detection, thereby reducing the detection cost. At the same time, since sulfur dioxide will generate water with sodium hydroxide solid only when the concentration is low, it can be detected even if the exhaust gas is diluted and then discharged;

[0033] 3. The present invention monitors the temperature by arranging the temperature sensor inside the detection box. Since the reaction between sulfur dioxide or sulfur trioxide and solid sodium hydroxide is an exothermic process, the temperature sensor will also detect the temperature change signal at this time, and then can cooperate with the signal of the raindrop sensor to comprehensively judge whether the current air contains waste gas secretly discharged by the factory, and at the same time can eliminate the influence of rain on the raindrop sensor;

[0034] 4. The present invention can absorb the water generated by the reaction of the two acidic gases with the sodium hydroxide solid inside the detection box by setting the water-absorbing sponge, thereby preventing excessive water inside the detection box. At the same time, since the bottom of the detection box is set as an inclined surface, the water can be quickly gathered to the side where the water-absorbing sponge is located, so that the water can be processed in time;

[0035] 5. The present invention can guide rainwater along the conical surface of the top of the top plate to the surrounding of the top plate through the setting of the top plate, and make it fall toward the vicinity of the pipeline to prevent rainwater from entering the inside of the pipeline. The top plate can also play a role in preventing dust and foreign matter, preventing dust or other foreign matter from entering the detection box to contaminate the sodium hydroxide solid and preventing dust or other foreign matter from affecting the detection results of the raindrop sensor;

[0036] The present invention monitors the atmospheric pressure in the current rural environment through air pressure detection. If the current atmospheric pressure is outside the normal pressure range of the current area, it is further determined whether the abnormal change is caused by the emission of exhaust gas or by natural wind. If both the temperature sensor and the raindrop sensor have signal changes, it means that the current pressure change is caused by the emission of exhaust gas, and the exhaust gas is also mixed with sulfur dioxide or sulfur trioxide. Then, the control unit immediately flips the air pressure sensor and closes the electric door, thereby protecting the air pressure sensor in the sealed space inside the shell to prevent the air pressure sensor from being in contact with acidic gas for a long time and causing the service life to be reduced. At the same time, the setting of the electric door can prevent human damage to the air pressure sensor. The wireless transmission unit can report the information of exhaust gas emission to the management department in time. At the same time, the setting of the alarm can remind the factory that emits exhaust gas to prevent the exhaust gas from continuing to pollute the rural environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a flow chart of the present invention;

[0038] Figure 2 A flow chart for judging exhaust gas according to the present invention;

[0039] Figure 3 is a control diagram of the present invention;

[0040] Figure 4 It is a schematic diagram of the internal structure of the housing of the present invention;

[0041] Figure 5 It is a schematic diagram of the back structure of the housing of the present invention;

[0042] Figure 6 It is a schematic diagram of the internal structure of the detection box of the present invention;

[0043] Figure 7 It is a schematic diagram of the top structure of the pipeline of the present invention.

[0044] In the figure: 1. Pipe; 2. Orifice plate; 3. Raindrop sensor; 4. Temperature sensor; 5. Shell; 6. Control box; 7. Electric door; 8. Air pressure sensor; 9. Motor; 10. Base plate; 11. Detection box; 12. Water-absorbing sponge; 13. Display screen; 14. Print port; 15. Alarm; 16. Support rod; 17. Top plate. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] See also Figure 1-7 , the present invention provides a technical solution:

[0047] Embodiment 1:

[0048] A rural environment detection method based on an air pressure sensor comprises the following steps:

[0049] S1. Air pressure detection: detect whether there is an air pressure change based on air fluctuations. If there is an air pressure change, it is necessary to further determine the factors causing the air pressure change.

[0050] S2. Determine the factors causing the current air pressure fluctuations, and determine whether the current air pressure change is caused by exhaust gas emissions or natural wind. If it is caused by exhaust gas emissions, it is necessary to further detect whether the exhaust gas contains sulfur dioxide and sulfur trioxide;

[0051] S3, sulfur dioxide and sulfur trioxide detection, use the detection box to detect whether the exhaust gas contains sulfur dioxide and sulfur trioxide;

[0052] S4, air pressure sensor protection: after sulfur dioxide and sulfur trioxide are detected, the air pressure sensor is sealed and protected by a protective device to prevent the air pressure sensor from being exposed to acidic gas for a long time, which may reduce its service life.

[0053] S5. Data recording: the recording unit in the control box records the duration of sensing sulfur dioxide and sulfur trioxide;

[0054] S6, early warning, the control unit in the control box sends out an alarm through the alarm to remind the factory to stop the continued emission of waste gas, and promptly send a notice to the management department, and at the same time generate corresponding paper records to record the time point and duration of the current waste gas emission.

[0055] Detect whether there is a change in air pressure based on air fluctuations, including:

[0056] Open the electric door 7, expose the air pressure sensor 8 to the air to detect the current air pressure, and set the normal air pressure change range according to the weather of the day. If the air pressure exceeds the range, it is determined that external factors have caused the air pressure to change. Before using the air pressure sensor 8 to detect the current air pressure, it is necessary to go online or obtain the local historical weather conditions from the Meteorological Bureau, and then calculate the air pressure changes on a weekly basis, and classify them according to the season, so as to obtain the normal air pressure change range. If the wind speed is high on that day, it will also cause abnormal air pressure changes. However, since the following method can exclude the situation where natural wind causes abnormal air pressure changes, exhaust emissions can be accurately detected.

[0057] Determine whether the current air pressure change is caused by exhaust emissions or natural wind, including:

[0058] S101, air enters the pipeline 1 and contacts the sodium hydroxide solid placed on the surface of the orifice plate 2;

[0059] S102: Whether the raindrop sensor 3 receives a water drop signal;

[0060] S103, if the raindrop sensor 3 continuously receives water drop signals within a period of time, it is determined that there is exhaust gas mixed in the air; otherwise, it is determined that natural wind has blown during this period of time, causing the current air pressure to change;

[0061] Since natural wind will also cause pressure fluctuations in an area, it is necessary to eliminate the influence of natural wind on the air pressure sensor 8. A small amount of sulfur dioxide and sulfur trioxide will produce water after contacting sodium hydroxide. At this time, the raindrop sensor 3 can receive continuous water drop signals. If the raindrop sensor 3 has no water drop signals, it means that there is no sulfur dioxide and sulfur trioxide in the air, so it is judged that there is no exhaust gas emission at this time. Moreover, since a top plate 17 is set on the top of the pipeline 1, the top plate 17 can block rainwater, thereby eliminating the influence of rainwater on the raindrop sensor 3.

[0062] The acid gas detection device is used to detect whether the exhaust gas contains sulfur dioxide and sulfur trioxide, including:

[0063] Since a small amount of sulfur dioxide and sulfur trioxide will produce water and release heat after contacting with sodium hydroxide, when the raindrop sensor 3 detects the water drops dripping from the orifice plate 2 and the temperature sensor 4 detects a certain increase in temperature, it can be determined that sulfur dioxide and sulfur trioxide are mixed in the current exhaust gas. The reactions between sulfur dioxide and sulfur trioxide and sodium hydroxide are acid-base neutralization. During this process, a certain amount of heat will be released, causing the temperature inside the detection box 11 to rise. At the same time, based on the signal of the raindrop sensor 3, it can be considered that the secretly discharged exhaust gas has entered the detection box 11 at this time, thereby achieving the purpose of detecting sulfur dioxide and sulfur trioxide without using a special sensor. The acid gas detection device is the detection box 11.

[0064] After sulfur dioxide and sulfur trioxide are detected, the air pressure sensor 8 is sealed and protected by a protective device, specifically including:

[0065] The protective device is a shell 5. A control box 6 fixedly arranged on the shell 5 controls the electric door 7 to close, so that the electric door 7 protects the air pressure sensor 8 inside the shell 5. At the same time, the control box 6 controls the motor 9 to start, and the motor 9 drives the substrate 10 on which the air pressure sensor 8 is installed to flip as a whole inside the shell 5, thereby isolating the air pressure sensor 8 from the outside world. When the electric door 7 is closed, the inside of the shell 5 becomes a closed space, and the motor 9 can drive the substrate 10 to flip, thereby causing the air pressure sensor 8 to flip as a whole, thereby preventing the external exhaust gas from contacting the air pressure sensor 8 for a long time to cause damage to the air pressure sensor 8 to the greatest extent, and can prevent human damage to the air pressure sensor 8.

[0066] The recording unit in the control box 6 records the duration of the sensing of sulfur dioxide and sulfur trioxide, specifically including:

[0067] A recording unit is provided in the control box 6, and the recording unit records the signal duration of the raindrop sensor 3. The water droplets on the surface of the raindrop sensor 3 will slide through the inclined surface at the bottom of the detection box 11 to the vicinity of the water-absorbing sponge 12 and be absorbed by it. The signal duration is from the first time the raindrop sensor 3 detects the water droplets to the time when the raindrop sensor 3 no longer has a signal change. The recording unit can record the signal change process of the raindrop sensor 3 in real time, and send the information to the display screen 13 for display, and can print it out through the printing unit.

[0068] The control unit in the control box 6 issues an alarm through the alarm 15 and sends a notification to the relevant departments, and generates corresponding paper records, including:

[0069] A control unit is provided in the control box 6. When the control unit receives the signal from the raindrop sensor 3, it reports the exhaust gas emission situation to the relevant departments through the wireless transmission unit, and starts the alarm 15 to warn the factory. The printing unit displays relevant content on the display screen 13 for the staff to print the content certificate from the printing port 14. The wireless transmission unit is set as a WIFI communication module. Through the WIFI communication module, the current signal changes of the raindrop sensor 3 can be transmitted to the management department in real time, so as to timely understand the exhaust gas emission situation. At the same time, the alarm 15 is used to warn the factory to stop the continued emission of exhaust gas.

[0070] Embodiment 2:

[0071] Since the pipeline 1 is opened vertically upward, it is easy for rainwater to fall into the detection box 11 on rainy days and interfere with the normal monitoring of water droplets by the raindrop sensor 3. If dust or other foreign matter enters the pipeline, it will cause the sodium hydroxide solid to be contaminated or affect the detection result of the raindrop sensor. Therefore, in this embodiment, a top plate 17 is installed on the surface of the pipeline 1 through a support rod 16. The surface of the top plate 17 is set to a conical structure. The top plate 17 is used to guide rainwater to the vicinity of the pipeline 1 on rainy days to prevent rainwater from entering the pipeline 1 and interfering with the detection result of the raindrop sensor 3. Through the setting of the top plate 17, rainwater can be guided along the conical surface of the top of the top plate 17 to the surrounding areas of the top plate 17, and made to fall toward the vicinity of the pipeline 1 to prevent rainwater from entering the interior of the pipeline 1. In addition, the top plate 17 can also play a role in dust and foreign matter prevention, making the detection result of the raindrop sensor 3 as accurate as possible.

[0072] Working principle: the control unit controls the substrate 10 to flip through the motor 9, and opens the electric door 7 at the same time, so that the air pressure sensor 8 fixed on the surface of the substrate 10 is exposed to the outside world, and then starts the air pressure sensor 8 to monitor the air pressure in the current area. When the air pressure sensor 8 detects that the air pressure changes abnormally, it transmits the change signal to the control unit. The control unit starts the temperature sensor 4 at this time. At the same time, due to the discharge of exhaust gas, part of the air will enter the inside of the detection box 11 through the pipeline 1 and contact with the solid sodium hydroxide. At this time, if sulfur dioxide or sulfur trioxide is mixed in the air, it will directly contact and react with the solid sodium hydroxide to generate water. The generated water will drip onto the raindrop sensor 3 through the orifice plate 2, so that the raindrop sensor 3 detects the water drop signal. Since the reaction of sulfur dioxide or sulfur trioxide with the solid sodium hydroxide is an exothermic process, the temperature sensor 4 will also detect the temperature change signal at this time. The signals of the temperature sensor 4 and the raindrop sensor 3 jointly determine that sulfur dioxide and sulfur trioxide are indeed mixed in the air at this time, and thus it is determined that the situation of illegal exhaust gas discharge has occurred at this time;

[0073] At this time, the control unit starts the electric door 7 and the motor 9. The motor 9 drives the air pressure sensor 8 to flip through the substrate 10, and the electric door 7 is closed to form a closed space inside the shell 5, thereby protecting the air pressure sensor 8. At the same time, the control unit sends the duration of the signal change detected by the raindrop sensor 3 to the display screen 13, and integrates this part of information through the WIFI communication module and sends it to the superior department to notify the staff to come for processing. The staff can print the information certificate through the printing port 14, so as to achieve the purpose of information retention, and when the raindrop sensor 3 detects a signal, the control unit will control the alarm 15 to start, thereby reminding the factory to stop exhaust emissions in time.

[0074] It should be noted that the alarm 15, electric door 7, air pressure sensor 8, motor 9, temperature sensor 4 and raindrop sensor 3 are devices or equipment existing in the prior art, or are devices or equipment that can be realized in the prior art. The specific composition and principle of the power supply of the alarm 15, electric door 7, air pressure sensor 8, motor 9, temperature sensor 4 and raindrop sensor 3 are clear to those skilled in the art, so they will not be described in detail.

[0075] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rural environment detection method based on air pressure sensor, characterized in that: The following steps are involved: S1. Air pressure detection: detect whether there is an air pressure change based on air fluctuations. If there is an air pressure change, it is necessary to further determine the factors causing the air pressure change. S2. Determine the factors causing the current air pressure fluctuations, and determine whether the current air pressure change is caused by exhaust gas emissions or natural wind. If it is caused by exhaust gas emissions, it is necessary to further detect whether the exhaust gas contains sulfur dioxide and sulfur trioxide; S3, sulfur dioxide and sulfur trioxide detection, use the detection box to detect whether the exhaust gas contains sulfur dioxide and sulfur trioxide; S4, air pressure sensor protection: after sulfur dioxide and sulfur trioxide are detected, the air pressure sensor is sealed and protected by a protective device to prevent the air pressure sensor from being exposed to acidic gas for a long time, which may reduce its service life. S5. Data recording: the recording unit in the control box records the duration of sensing sulfur dioxide and sulfur trioxide; S6, early warning, the control unit in the control box sends out an alarm through the alarm to remind the factory to stop the continued emission of waste gas, and promptly send a notice to the management department, and at the same time generate corresponding paper records to record the time point and duration of the current waste gas emission.

2. A rural environment detection method based on an air pressure sensor according to claim 1, characterized in that: The detecting whether there is a current air pressure change according to air fluctuations specifically includes: Open the electric door and expose the air pressure sensor to the air to detect the current air pressure. Set the normal air pressure change range according to the weather of the day. If the air pressure exceeds this range, it is determined that external factors have caused the air pressure to change.

3. A rural environment detection method based on an air pressure sensor according to claim 1, characterized in that: The determination of whether the current air pressure change is caused by exhaust gas emissions or natural wind specifically includes: S101, air enters the pipeline and contacts the solid sodium hydroxide placed on the surface of the orifice plate; S102: Whether the raindrop sensor receives a water drop signal; S103: If the raindrop sensor continuously receives water drop signals within a period of time, it is determined that exhaust gas is mixed in the air; otherwise, it is determined that natural wind has blown during the period of time, causing the current air pressure to change.

4. The rural environment detection method based on air pressure sensor according to claim 1, characterized in that: The method of detecting whether the exhaust gas contains sulfur dioxide and sulfur trioxide by using an acid gas detection device specifically includes: Since a small amount of sulfur dioxide and sulfur trioxide will produce water and release heat when in contact with sodium hydroxide, when the raindrop sensor detects water droplets dripping from the orifice plate and the temperature sensor detects a certain temperature increase, it can be determined that sulfur dioxide and sulfur trioxide are mixed in the current exhaust gas.

5. The rural environment detection method based on air pressure sensor according to claim 1 is characterized in that: After sulfur dioxide and sulfur trioxide are detected, the air pressure sensor is sealed and protected by a protective device, which specifically includes: The protection device is a shell, and a control box fixedly arranged on the shell controls the electric door to close, so that the electric door protects the air pressure sensor inside the shell. At the same time, the control box controls the motor to start, and the motor drives the substrate on which the air pressure sensor is installed to flip as a whole inside the shell, thereby isolating the air pressure sensor from the outside world.

6. A rural environment detection method based on air pressure sensor according to claim 1, characterized in that: The recording unit in the control box records the duration of sensing sulfur dioxide and sulfur trioxide, specifically including: The control box is provided with a recording unit, which records the signal duration of the raindrop sensor. The water droplets on the surface of the raindrop sensor will slide through the inclined surface at the bottom of the detection box to the vicinity of the absorbent sponge and be absorbed by it. The signal duration is from the first time the raindrop sensor detects water droplets to the time when the raindrop sensor no longer has signal changes.

7. A rural environment detection method based on an air pressure sensor according to claim 1, characterized in that: The control unit in the control box sounds an alarm through the alarm, sends a notification to the relevant departments, and generates corresponding paper records, including: The control box is provided with a control unit. When receiving the signal from the raindrop sensor, the control unit reports the exhaust gas emission situation to the relevant departments through the wireless transmission unit, activates the alarm to warn the factory, and displays the relevant content on the display screen through the printing unit for the staff to print the content certificate from the printing port.

8. The rural environment detection method based on air pressure sensor according to claim 3 is characterized in that: A top plate is installed on the surface of the pipe through a support rod. The surface of the top plate is set to a conical structure. The top plate is used to guide rainwater to the vicinity of the pipe on rainy days to prevent rainwater from entering the pipe and interfering with the detection results of the raindrop sensor.

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