Device and method for monitoring air quality change

Abstract

The invention relates to a device and a method for monitoring air quality change, pollutants in air are monitored by adopting a spectral analysis technology, and real-time transmission of data is realized through a 4G communication technology. The device can monitor the absorption condition of related gas under different wave bands, judge the change of air quality and reduce time difference fluctuation in a differential mode, has a field calibration function to set an early warning value, and performs abnormity reminding once the early warning value is exceeded.

Description

Technical Field

[0001] The present invention relates to the field of environmental monitoring, and in particular to a device and method for monitoring changes in air quality. Technical Background

[0002] With the rapid development of industry and urbanization and the continuous growth of energy consumption, a large amount of air pollution such as haze and chemical smog has been caused. The problem of environmental pollution is becoming increasingly serious, affecting people's daily life and even causing related diseases. Therefore, air quality monitoring has become an important means of environmental protection. However, traditional air quality monitoring methods mainly rely on manual sampling, laboratory analysis and other means, which are time-consuming and cannot reflect air quality changes in real time. The existing online equipment for ambient air is also expensive due to its large size, inconvenient to install when in use, and there is no comprehensive installation and monitoring due to the price. Therefore, it is of great significance to develop an air quality monitoring device that can monitor in real time, transmit data remotely, and has a small size and high cost performance. Therefore, in order to solve the above problems, the present invention utilizes the absorption of different band spectra by different pollutants in the air, identifies multiple pollutants in real time online, avoids time difference by differential calculation, sets warning downline value warning, and finally transmits real-time data to the cloud through 4G communication technology, and proposes a device and method for monitoring air quality changes. Summary of the invention

[0003] The purpose of the present invention is to provide a device and method for monitoring air quality changes. The present invention solves the problem that traditional air monitoring relies on manual sampling and analysis, which takes a long time, and the existing equipment is large and expensive and inconvenient to install in large quantities.

[0004] In order to achieve the above-mentioned purpose and solve the technical problems, the present invention is implemented by the following technical solutions:

[0005] The present invention discloses a device for monitoring air quality changes, comprising a detection module, a 4G communication module, a power module, an air pump module, a system cloud module, and a box module, wherein:

[0006] The detection module is connected to the 4G communication module and includes a transmitter and a receiver. The transmitter emits a light beam in the 200-1700nm band, and the receiver receives the light beam absorbed or scattered after passing through the air sample to obtain the spectrum of the light beam after passing through the air sample. Pollutants in the air are analyzed according to the spectrum, and all spectral data are transmitted back to the system cloud module for processing;

[0007] The power supply module is electrically connected to the detection module and is used to provide working power for the entire system;

[0008] The air pump module is connected to the detection module through the power module, and is used to absorb external air to collect spectral data and discharge air after the collection is completed;

[0009] The system cloud module is connected to the 4G communication module to receive and store the spectral data collected by the spectrometer, and then realize air monitoring through calculation;

[0010] The box module houses all the above modules to ensure that other modules are not affected by the external weather environment and can enable other modules to work normally.

[0011] The present invention further discloses a method for monitoring air quality changes, which uses the above-mentioned device for monitoring air quality changes to perform detection, and includes the following steps:

[0012] Step 1: In order to realize a device and method for monitoring changes in air quality, it is necessary to collect pollution-free characteristic spectrum data and characteristic spectrum data of air with various pollutants. The two states are collected alternately and repeated until the regularity is fully reflected.

[0013] The pollution-free air and polluted air are calibrated by professional laboratories using relevant national standard experimental methods, and the calibration data is input into the cloud background for data processing.

[0014] Step 2: The data repeatability is good during the repeated collection process in step 1. However, due to the aging process of electronic components, the equipment will experience time difference data fluctuations when the time line is extended. Therefore, in order to solve the above time difference problem, a correction scheme using differential calculation method is formulated:

[0015] There are original spectrum A and original spectrum B. Original spectrum A is the first spectrum data collected, original spectrum B is the second spectrum data collected, and S is the differential spectrum value. The differential method is used to reduce the time difference fluctuation and thus improve the accuracy of data processing.

[0016] Difference formula: S=BA

[0017] Step 3: Enter the cloud backend and perform positive and abnormal calibration on the data calibrated by the experimental method in step 1 to ensure the accuracy of the data. Calculate the differential spectrum value through step 2. When the differential value is negative, the higher the pollutant concentration, the lower the differential value. If it is positive, the air quality is judged to be unpolluted air. The calculated differential value is put into visual dimensionality reduction to confirm the spectral absorption area and corresponding wavelength of various pollutants.

[0018] The spectral absorption region includes an ultraviolet light region, a visible light region, and an infrared light region.

[0019] Step 4: According to the pollution spectrum calibrated in step 1, the differential spectrum calculated in step 2 is used to obtain the differential value of the polluted air. Step 3 confirms the spectral region of the polluted air and sets the differential value of the spectral region as the warning value. When the pollutant concentration exceeds the warning value, a warning signal is issued. On the contrary, when it is higher than the warning value, the air is not polluted or the pollution level is low. The on-site calibration function can flexibly set the warning value to improve the pertinence of monitoring, timely detect abnormal air quality conditions and take corresponding measures.

[0020] The beneficial effects of the present invention are:

[0021] 1. The present invention is a real-time air quality monitoring device and method based on spectral analysis and 4G communication, which can monitor pollutants in the air in real time and transmit data to a remote monitoring center in real time through 4G communication technology; adopt a differential method to reduce time difference fluctuations and improve the accuracy of data processing; according to the warning value set by the on-site calibration function, abnormal air quality conditions can be discovered in time and corresponding measures can be taken;

[0022] 2. The device has simple structure, convenient operation, low cost, good stability and high accuracy, and is suitable for air quality monitoring in various environments and conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0024] Figure 1 Flowchart of a method for monitoring air quality changes

[0025] Figure 2 Diagram of a device for monitoring changing air quality DETAILED DESCRIPTION

[0026] The following will clearly and completely describe and discuss the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings of the present invention. Obviously, what is described here is only a part of the examples of the present invention, not all the examples. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] In order to solve the problem of online real-time monitoring of air quality changes, the present invention is described in detail in conjunction with the accompanying drawings, and its specific implementation steps are as follows:

[0028] Embodiment 1

[0029] The present invention discloses a device for monitoring air quality changes, comprising a detection module, a 4G communication module, a power module, an air pump module, a system cloud module, and a box module, wherein:

[0030] The detection module is connected to the 4G communication module and includes a transmitter and a receiver. The transmitter emits a light beam in the 200-1700nm band, and the receiver receives the light beam absorbed or scattered after passing through the air sample to obtain the spectrum of the light beam after passing through the air sample. Pollutants in the air are analyzed according to the spectrum, and all spectral data are transmitted back to the system cloud module for processing;

[0031] The power supply module is electrically connected to the detection module and is used to provide working power for the entire system;

[0032] The air pump module is connected to the detection module through the power module, and is used to absorb external air to collect spectral data and discharge air after the collection is completed;

[0033] The system cloud module is connected to the 4G communication module to receive and store the spectral data collected by the spectrometer, and then realize air monitoring through calculation;

[0034] The box module houses all the above modules to ensure that other modules are not affected by the external weather environment and can enable other modules to work normally.

[0035] The present invention further discloses a method for monitoring air quality changes, which uses the above-mentioned device for monitoring air quality changes to perform detection, and includes the following steps:

[0036] Step 1: In order to realize a device and method for monitoring air quality changes, it is necessary to collect pollution-free characteristic spectrum data and various pollutant air characteristic spectrum data.

[0037] The polluted air includes hydrogen sulfide, smoke and ethylene. The pollution-free and polluted gases are collected in turn and repeated until the pattern is fully reflected. The collection is completed. All pollution-free air and polluted air are calibrated by professional laboratories through relevant national standard experimental methods, and the calibration data is input into the cloud background for data processing.

[0038] Step 2: The data repeatability is good during the repeated collection process in step 1. However, due to the aging process of electronic components, the equipment will experience time difference data fluctuations when the time line is extended. Therefore, in order to solve the above time difference problem, a correction scheme using differential calculation method is formulated:

[0039] There are original spectrum A and original spectrum B. Original spectrum A is the first spectrum data collected, original spectrum B is the second spectrum data collected, and S is the differential spectrum value. The differential method is used to reduce the time difference fluctuation and thus improve the accuracy of data processing.

[0040] Difference formula: S=BA

[0041] Step 3: Enter the cloud backend to calibrate the data calibrated by the experimental method in step 1 for positive and abnormal calibration, calculate the differential spectrum value through step 2, and put it into the cloud backend for visualization to confirm that the spectral absorption area of ​​various hydrogen sulfides is in the ultraviolet light area, the spectral absorption area of ​​smoke is in the visible light area, and the spectral absorption area of ​​ethylene is in the infrared light area. The absorption wavelength of hydrogen sulfide is 255nm, the absorption wavelength of smoke is 420-780nm, and the absorption wavelength of ethylene is 1635nm.

[0042] The spectral absorption region includes an ultraviolet light region, a visible light region, and an infrared light region.

[0043] The determination of whether the differential value of the spectral absorption region is a negative number is that the higher the pollutant concentration is, the lower the differential value is; if it is a positive number, the air quality is judged to be unpolluted air.

[0044] Step 4: According to the pollution spectrum calibrated in step 1, the differential spectrum calculated in step 2 is used to obtain the differential value of polluted air. Step 3 confirms the spectral region of polluted air, and obtains the differential value of hydrogen sulfide pollution at 255nm is -2000, the differential value of smoke pollution at 420-780nm is -2380, and the differential value of ethylene smoke pollution at 1635nm is -3123. These three differential values ​​are set as warning values. When the pollutant concentration exceeds the warning value, a warning signal is issued. On the contrary, when it is higher than the warning value, the air is not polluted or the pollution level is low. The on-site calibration function can flexibly set the warning value to improve the pertinence of monitoring, timely detect abnormal air quality conditions and take corresponding measures.

[0045] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the disclosure disclosed herein. This application is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

[0046] It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure should be limited by the appended claims.

Claims

1. A device and method for monitoring air quality changes, the present invention relates to the field of environmental monitoring, and its characteristics include the following steps: The present invention discloses a device for monitoring air quality changes, comprising a detection module, a 4G communication module, a power module, an air pump module, a system cloud module, and a box module, wherein: The power supply module is electrically connected to the detection module and is used to provide working power for the entire system; The air pump module is connected to the detection module through the power module, and is used to absorb external air to collect spectral data and discharge air after the collection is completed; The system cloud module is connected to the 4G communication module to receive and store the spectral data collected by the spectrometer, and then realize air monitoring through calculation; The box module houses all the above modules to ensure that other modules are not affected by the external weather environment and can enable other modules to work normally. The present invention further discloses a method for monitoring air quality changes, which uses the above-mentioned device for monitoring air quality changes to perform detection, and includes the following steps: Step 1: In order to realize a device and method for monitoring changes in air quality, it is necessary to collect pollution-free characteristic spectrum data and characteristic spectrum data of air with various pollutants. The two states are collected alternately and repeated until the regularity is fully reflected. The pollution-free air and polluted air are calibrated by professional laboratories using relevant national standard experimental methods, and the calibration data is input into the cloud background for data processing. Step 2: The data repeatability is good during the repeated collection process in step 1. However, due to the aging process of electronic components, the equipment will have time difference data fluctuations when the time line is extended. Therefore, in order to solve the above time difference problem, a correction plan using differential calculation method was developed. Step 3: Enter the cloud backend and perform positive and abnormal calibration on the data calibrated by the experimental method in step 1 to ensure the accuracy of the data. Calculate the differential spectrum value through step 2. If the differential value is negative, the higher the pollutant concentration, the lower the differential value. If it is positive, the air quality is judged to be unpolluted air. The calculated differential value is put into visual dimensionality reduction to confirm the spectral absorption area and corresponding wavelength of various pollutants. The spectral absorption region includes an ultraviolet light region, a visible light region, and an infrared light region. Step 4: Based on the pollution spectrum calibrated in step 1, the differential value of the polluted air is obtained from the differential spectrum calculated in step 2, and step 3 confirms the spectral region of the polluted air.

2. A method for monitoring air quality changes according to claim 1, characterized in that: The detection module is connected to the 4G communication module and includes a transmitter and a receiver. The transmitter emits a light beam in the 200-1700nm band, and the receiver receives the light beam absorbed or scattered after passing through the air sample to obtain the spectrum of the light beam after passing through the air sample. Pollutants in the air are analyzed according to the spectrum, and all spectral data are transmitted back to the system cloud module for processing.

3. A method for monitoring air quality changes according to claim 1, characterized in that: In step 2, a correction scheme using differential calculation is formulated: There are original spectrum A and original spectrum B. Original spectrum A is the first spectrum data collected, original spectrum B is the second spectrum data collected, and S is the differential spectrum value. The differential method is used to reduce the time difference fluctuation and thus improve the accuracy of data processing. Difference formula: S=BA.

4. A method for monitoring air quality changes according to claim 1, characterized in that: In step 4: Set the difference value of the spectral area as the warning value. When the pollutant concentration exceeds the warning value, a warning signal is issued. On the contrary, when it is higher than the warning value, the air is not polluted or the pollution level is low. The on-site calibration function can flexibly set the warning value to improve the pertinence of monitoring, timely detect abnormal air quality conditions and take corresponding measures.

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