Odor gas monitoring system for industrial parks

Abstract

The present invention provides an odor gas monitoring system suitable for industrial parks, which relates to the fields of Internet of Things and electronic information technology. The system includes an odor collection terminal, a server and a client; the odor collection terminal includes a sensor component, a main control module and a communication module, the sensor component includes a sensor array, wherein the sensor array integrates at least two odor sensors, and each odor sensor uses a different metal oxide as a gas reactant, and the sensor array is used to collect odor data in the industrial park; the main control module sends the odor data to the server; the communication server of the server receives the odor data and sends it to the odor recognition server; the odor recognition server recognizes the odor data and sends the odor recognition result to the client; the odor recognition result visualization APP of the client displays the odor recognition result. This solution can improve the accuracy of odor gas monitoring in industrial parks.

Description

Technical Field

[0001] The present invention relates to the field of Internet of Things and electronic information technology, and in particular to an odorous gas monitoring system suitable for an industrial park. Background Art

[0002] With the rapid development of China's economy, while contributing to infrastructure construction, it has also brought a series of environmental problems. For example, there are more and more complaints about environmental odor problems, especially for production enterprises or chemical parks with large mobility and large detection range. Therefore, the requirements for environmental testing are getting higher and higher, especially for some unorganized odor dimensionless emissions.

[0003] At present, many enterprises and units, in addition to the regular sampling laboratory GC / MS qualitative and quantitative testing, also need to conduct on-site testing and other work. However, many odor pollution problems have complex causes. For example, there are thousands of types of odors, which are very complicated; each odor is different from the human olfactory threshold, and the olfactory threshold of some substances is extremely low; there are interactions between odor substances; many odor gases are unstable and concentrate at any time; intermittent emission of odor pollution makes it difficult to pick up sample gas in time, and the pollution results cannot be judged in time; environmental monitoring personnel cannot detect odor leakage in industrial parks in time; industrial parks are extensive, and if they are inspected, the manpower investment is expensive; after the odor event, environmental monitoring personnel cannot find the time point when the odor occurred. These problems are the main reasons for the current odor monitoring. Traditional testing methods no longer meet the current actual situation. Therefore, forming a set of odor solutions for the entire industrial park is of great significance for environmental pollution monitoring and safe and stable operation of industrial parks.

[0004] However, the gas types in industrial parks are complex, and the current odor monitoring in chemical companies and industrial parks mainly relies on a single sensor. For the complex gas environment in industrial parks, the accuracy of the monitoring results is greatly reduced, making it difficult to apply to odor monitoring in industrial parks. Summary of the invention

[0005] In view of this, in response to the above shortcomings, it is necessary to propose an odor gas monitoring system suitable for industrial parks to improve the accuracy of odor gas monitoring in industrial parks.

[0006] The present invention provides an odor gas monitoring system suitable for an industrial park, the system comprising: an odor collection terminal, a server and a client; the odor collection terminal is connected to the server via WB-IoT communication, and the server and the client are connected via Ethernet communication;

[0007] The odor collection terminal includes a sensor component, a main control module and a communication module. The sensor component includes a sensor array, wherein the sensor array integrates at least two odor sensors, and each odor sensor uses a different metal oxide as a gas reactant; the sensor array is used to collect odor data in the industrial park and send the collected odor data to the main control module; the main control module sends the collected odor data to the server through the communication module;

[0008] The server includes a communication server and an odor recognition server. The communication server is used to receive odor data sent through the communication module and send the odor data to the odor recognition server; the odor recognition server is used to identify the odor data, obtain an odor recognition result, and send the odor recognition result to the client; the client includes an odor recognition result visualization APP, which is used to display the odor recognition result of the current odorous gas sent by the server.

[0009] Preferably, the sensor assembly comprises a first gas channel and a first filter device, wherein the first gas channel is used to connect the sensor array and the first filter device, and the first filter device is used to filter large particulate matter in the gas to be monitored.

[0010] Preferably, the sensor assembly further comprises a second gas channel, a second filter device and a solenoid valve, wherein the second gas channel is used to connect the first gas channel and the sensor array, and the second filter device is arranged on the second gas channel to sterilize and filter the gas passing through the second gas channel; the solenoid valve is arranged at a position where the first gas channel is connected to the second gas channel;

[0011] The solenoid valve is electrically connected to the main control module and is used to control the flow channel of the gas to be monitored; the main control module is used to calibrate the sensor array using the gas sterilized and filtered by the second filter device when the solenoid valve controls the gas to be monitored to flow through the second gas pipeline.

[0012] Preferably, the main control module is also used to control the solenoid valve to close the first gas channel and open the second gas channel at every preset time interval, so as to perform regular calibration on the sensor array.

[0013] Preferably, an air pump is also provided at the front end of the first filtering device, and the air pump is communicatively connected with the main control module; the main control module is used to control the operation of the air pump to actively introduce the gas to be monitored into the gas channel.

[0014] Preferably, the main control module is also used to obtain meteorological information of the gas monitoring area in real time, and dynamically control the operating power of the air pump by PWM driving according to the acquired meteorological information.

[0015] Preferably, the main control module is used to control the air pump using a PWM wave with a first duty cycle when the wind force in the gas monitoring area is not greater than level 4; to control the air pump using a PWM wave with a first duty cycle when the wind force in the gas monitoring area is greater than level 4 and less than level 6; and to control the air pump using a PWM wave with a third duty cycle when the wind force in the gas monitoring area is not less than level 6; wherein the first duty cycle>the second duty cycle>the third duty cycle.

[0016] Preferably, the odor recognition server is pre-configured with an odor recognition model, and the training method of the odor recognition model includes:

[0017] Acquire at least two sample training sets; wherein each sample training set includes: a set of sample odor data and a label for defining the type of odorous gas corresponding to the sample training set, and each set of sample odor data includes odor data collected historically by at least one odor sensor in the sensor array;

[0018] The at least two sample training sets are used to perform model training to obtain the odor recognition model.

[0019] Preferably, the types of labels of each sample training set for training the odor recognition model can cover the types of odorous gases that may appear in the industrial park.

[0020] Preferably, the main control module includes: a first cache unit, a second cache unit and a third cache unit; the standard queue length of the first cache unit is a first preset value, the standard queue length of the second cache unit is a second preset value, and the standard queue length of the third cache unit is a third preset value; the first cache unit is used to receive and store the odor data sent by the sensor array; the second cache unit is used to receive and store the odor data stored in the first cache unit in real time; and the second cache unit is also used to determine whether the current queue length of the third cache unit is less than the third preset value, and when it is less than the third preset value, obtain the stored odor data and send it to the third cache unit; the third cache unit is used to send the odor data sent by the second cache unit to the server through the communication module, and each time a piece of data is successfully sent, the current queue length of the third cache unit is reduced by one.

[0021] It can be seen from the above technical scheme that the odor gas monitoring system suitable for industrial parks provided by the embodiment of the present invention includes an odor collection terminal, a server and a client. The sensor component in the odor collection terminal includes a sensor array composed of at least two odor sensors, and different odor sensors use different metal oxides as gas reactants. When performing odor gas monitoring, the sensor array collects odor data in the industrial park and sends it to the main control module, which is further sent to the server through the communication module. The server is configured with an odor recognition server for identifying the odor data to obtain an odor recognition result. The obtained odor recognition result is sent to the client via Ethernet and displayed through the odor recognition result visualization APP for viewing by the staff. It can be seen that the sensor array in the odor gas monitoring system suitable for industrial parks provided by this scheme is composed of multiple odor sensors, and the metal oxides of each odor sensor are different, which can be sensitive to various gases in the industrial park, so that it is suitable for gas monitoring in complex gas environments in industrial parks, and greatly improves the accuracy of odor gas monitoring results in industrial parks. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of an odorous gas monitoring system suitable for an industrial park provided in an embodiment of the present invention.

[0023] Figure 2 A schematic diagram of another odor gas monitoring system suitable for an industrial park provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] See also Figure 1-2 , the present invention provides an odor gas monitoring system suitable for industrial parks, the system comprising: an odor collection terminal, a server and a client; the odor collection terminal is connected to the server via WB-IoT communication, and the server and the client are connected via Ethernet communication;

[0026] The odor collection terminal includes a sensor component, a main control module and a communication module. The sensor component includes a sensor array, wherein the sensor array integrates at least two odor sensors, and each odor sensor uses a different metal oxide as a gas reactant; the sensor array is used to collect odor data in the industrial park and send the collected odor data to the main control module; the main control module sends the collected odor data to the server through the communication module;

[0027] The server includes a communication server and an odor recognition server. The communication server is used to receive odor data sent through the communication module and send the odor data to the odor recognition server; the odor recognition server is used to identify the odor data, obtain an odor recognition result, and send the odor recognition result to the client; the client includes an odor recognition result visualization APP, which is used to display the odor recognition result of the current odorous gas sent by the server.

[0028] The odor environment in chemical companies and industrial parks is complex, and the current odor gas monitoring is mainly based on a single sensor, which cannot monitor the complex mixed gases in the industrial park in real time; and even if some industrial parks install large-scale odor electronic sensors, they are expensive and cannot be gridded densely to trace the pollution points in time. The sensor array used in the odor gas monitoring system provided by this solution is composed of a number of odor sensors, and each odor sensor uses a different metal oxide as a gas reactant, so that it can be sensitive to various gases in the industrial park, thereby realizing the monitoring of various gases in the industrial park. For example, the sensor array can use a MEMS release electronic nose sensor, which is composed of an array odor sensor with 32 metal oxide sensors to monitor various odor gases. In addition, a single gas sensor is replaced by a whole array sensor array, which greatly reduces the cost of the sensor.

[0029] Compared with NB-IoT communication technology, WB-IoT has the advantages of wide coverage, pure signal with little interference, high penetration, fast site establishment, no pre-installation conditions, can be installed and put into use immediately, supports data transparent transmission, can be deployed locally in the user's computer room, can support both national secret algorithms and international mainstream algorithms of IoT chips, and has low communication costs. Therefore, it is considered to realize communication between the odor collection terminal and the server through WB-IoT communication service.

[0030] Furthermore, the odor collection terminal and the server can transmit data via the MQTT protocol. For example, the odor collection terminal may include a data transmission protocol based on MQTT communication, and the server includes a cloud MQTT communication server, so that the odor data of the odor collection terminal can be sent to the server based on the MQTT protocol.

[0031] In order to reduce the impact of large particles in the air and odorous gas on the detection accuracy and service life of the sensor array, such as dust, PM2.5 and other large particulate matter in the air. Therefore, in one embodiment, the sensor assembly may include a first gas channel and a first filter device, the first gas channel is used to connect the sensor array and the first filter device, and the first filter device is used to filter the large particulate matter in the gas to be monitored. In this way, the large particulate matter in the gas to be monitored can be filtered by the first filter device to prevent the large particulate matter from entering the sensor array and affecting the detection accuracy and service life of the odor sensor. For example, the first filter device can be an air filter element, which filters out large particulate matter such as PM2.5 in the gas to be monitored through the air filter element, and then collects and detects the odorous gas.

[0032] In addition, since the long-term redox reaction of high-concentration gas will gradually cause the odor data output by the sensor to deviate from the true value, in one embodiment, in order to correct the parameters of the odor sensor, the sensor assembly may further include a second gas channel, a second filter device and a solenoid valve, the second gas channel is used to connect the first gas channel and the sensor array, the second filter device is arranged on the second gas channel, and is used to sterilize and filter the gas passing through the second gas channel; the solenoid valve is arranged at a position where the first gas channel is connected to the second gas channel;

[0033] The solenoid valve is electrically connected to the main control module and is used to control the flow channel of the gas to be monitored; the main control module is used to calibrate the sensor array using the gas sterilized and filtered by the second filter device when the solenoid valve controls the gas to be monitored to flow through the second gas pipeline.

[0034] In this embodiment, the sensor assembly also includes a second gas channel, a second filter device and a solenoid valve. The two ends of the second gas channel are respectively connected to the first gas channel and the sensor array, and the second filter device is arranged on the second gas channel, which can sterilize and filter the gas in the second gas channel. In this way, under normal circumstances, the first gas channel is open and the second gas channel is closed. When the gas to be monitored enters the device, the large particles in the gas to be monitored are filtered by the first filter device, and under normal circumstances, they are transported to the sensor array through the first gas channel for normal detection. In some scenarios, such as when the detection accuracy of the sensor array decreases, the first gas channel can be closed and the second gas channel can be opened by controlling the action of the solenoid valve. After the large particles are filtered by the first filter device, the gas to be monitored passes through the second gas channel and enters the second filter device, and the gas to be monitored is filtered and sterilized by the second filter device. The gas after filtration and sterilization removes toxic and harmful substances in the gas, so that it can be used as a standard gas to calibrate each odor sensor in the sensor array to correct the basic data. Moreover, by calibrating the sensor array, it is possible to avoid frequent replacement of each odor sensor in the sensor array, thereby extending the service life of the sensor array.

[0035] The second filtering device may be provided with a toxic gas filter element to sterilize and filter the gas to be monitored, and filter out toxic and harmful gases contaminated in the gas to be monitored, thereby ensuring the accuracy of calibrating the sensor array using the filtered gas.

[0036] For verification, the operator can issue a switching instruction through the client, or set up regular verification. In one embodiment, the main control module is also used to control the solenoid valve to close the first gas channel and open the second gas channel at every preset time interval to perform regular verification of the sensor array. For example, the time interval can be configured to be 3 days, and every 3 days the main control module controls the solenoid valve to switch the gas channel once, so that the first gas channel is closed and the second gas channel is opened, so as to achieve regular verification of the sensor array.

[0037] In order to better monitor abnormal odors in the air and allow abnormal gases to enter the device smoothly and fully contact the sensor array for monitoring, it is considered to use active suction to guide the airflow into the sensor array. Specifically, in one embodiment, an air pump can also be set at the front end of the first filter device, and the air pump is communicatively connected to the main control module; the main control module is used to control the operation of the air pump to actively introduce the gas to be monitored into the gas channel. In this way, the air pump can be operated uninterruptedly to introduce the airflow into the gas channel, thereby ensuring the reliability of the monitoring results.

[0038] In one embodiment, in order to reduce the energy loss and the loss of the air pump itself and increase the service life of the air pump, it is considered to obtain the meteorological information of the gas monitoring area in real time through the main control module, and dynamically control the operating power of the air pump by PWM drive based on the acquired meteorological information.

[0039] For example, in one embodiment, meteorological information may include wind information, which may be obtained from a local meteorological station in real time through a network, or a wind detector may be set up for monitoring. The main control module may be used to control the air pump using a PWM wave with a first duty cycle when the wind force in the gas monitoring area is not greater than level 4; to control the air pump using a PWM wave with a first duty cycle when the wind force in the gas monitoring area is greater than level 4 and less than level 6; and to control the air pump using a PWM wave with a third duty cycle when the wind force in the gas monitoring area is not less than level 6; wherein the first duty cycle> the second duty cycle> the third duty cycle.

[0040] In this embodiment, the main control module dynamically controls the operating power of the air pump by combining the meteorological information with the PWM drive mode. When the wind force is less than level 4, a PWM wave with a duty cycle of 40% can be used for control, so that the air pump can effectively inhale air into the gas channel; when the wind force is greater than level 4 and less than level 6, a PWM wave with a duty cycle of 20% can be used for control, and when the wind force is greater than level 6, a PWM wave with a duty cycle of 10% can be used for control, both of which can effectively introduce surrounding air into the gas channel, which not only reduces the power loss of the air pump, but also avoids the air pump from being in a state of high-speed operation all the time, reduces the internal motor from being in a state of heating and wear, and can greatly extend the service life of the entire equipment.

[0041] For the odor recognition server on the server side, it can pre-configure an odor recognition model to identify the odor data through the odor recognition model and determine the gas type and other data corresponding to the odor data. When training the odor recognition model, the odor data collected historically can be used for training. Specifically, it can be achieved in the following ways:

[0042] Acquire at least two sample training sets; wherein each sample training set includes: a set of sample odor data and a label for defining the type of odorous gas corresponding to the sample training set, and each set of sample odor data includes odor data collected historically by at least one odor sensor in the sensor array;

[0043] The model is trained using at least two sample training sets to obtain an odor recognition model.

[0044] In this embodiment, when training the odor recognition model, each sample training set includes a set of sample odor data and a label of an odor gas type, and because an odor gas may react with one or more metal oxides, each set of sample odor data includes at least odor data collected by at least one odor sensor in the sensor array. In other words, each set of sample odor data may include data collected by one odor sensor or multiple odor sensors, thereby ensuring the data coverage of the trained model and improving the recognition accuracy of the trained model.

[0045] Of course, in order to ensure the recognition accuracy of the trained model, the label types of each sample training set for training the odor recognition model can cover the types of odorous gases that may appear in the industrial park. In other words, the number and types of sample training sets can cover all possible types of odorous gases that may appear in the industrial park.

[0046] In addition, since the odor collection terminal and the server share a shared network, the communication efficiency changes with the dynamic changes of the user, and the stability of data transmission also changes accordingly. In this process, data cache waiting, failed retransmission, etc. greatly affect the execution of normal services. Therefore, in one embodiment, the main control module may include: a first cache unit, a second cache unit and a third cache unit; the standard queue length of the first cache unit is a first preset value, the standard queue length of the second cache unit is a second preset value, and the standard queue length of the third cache unit is a third preset value; the first cache unit is used to receive and store the odor data sent by the sensor array; the second cache unit is used to receive and store the odor data stored in the first cache unit in real time; and the second cache unit is also used to determine whether the current queue length of the third cache unit is less than the third preset value, and when it is less than the third preset value, obtain the stored odor data and send it to the third cache unit; the third cache unit is used to send the odor data sent by the second cache unit to the server through the communication module, and each time a piece of data is successfully sent, the current queue length of the third cache unit is reduced by one.

[0047] In this embodiment, the data collected by the sensor array is text data with a data length of about 1255. It can be considered to convert it into hexadecimal data and save and transmit it by constructing a new frame data format to effectively reduce the size of data bytes stored and transmitted.

[0048] Furthermore, the queue length of the first cache unit is set to 5, the queue length of the second cache unit is set to 100, and the queue length of the third cache unit is set to 5. The first cache unit receives data from the odor sensor every 3 seconds, and performs format conversion and encapsulation. The odor data after format conversion is first stored in the first cache unit. The second cache unit receives the data of the first cache unit in real time, stores it in the second cache unit first, and then determines whether the queue length of the third cache unit is less than 5. If it is less than 5, the data is obtained from the second cache unit and then sent to the third cache unit. If the second cache unit determines that the queue length of the third cache unit is equal to 5, the data continues to be cached in the second cache unit. When the queue data of the second cache unit is greater than 80, the system believes that there is a serious abnormality in the data processing of the third cache unit. At this time, the data persistence storage strategy is triggered, and the second cache unit takes out the data in the second cache queue and saves it to non-volatile memory Flash, TF and other devices.

[0049] When the network is unobstructed, the data in the queue of the third cache unit and the data in the queue of the second cache unit are sent one after another. When the length of the queue of the second cache unit is less than 10, the second cache unit detects whether there is data in the non-volatile memory Flash, TH and other devices. If there is data, 20 pieces of data are read at a time into the queue of the second cache unit for caching, and are sent to the third cache unit in sequence according to the transmission mechanism. When the length of the second cache unit is less than 10 again, 20 pieces of data are read from the non-volatile memory again, and the cycle is repeated until all data is sent.

[0050] The third cache unit is a network data transmission cache unit. Each time a piece of data is successfully sent out, the queue length of the third cache unit is reduced by 1. If there is a network failure, when the queue length of the third cache unit is equal to 5, the second cache unit will no longer send data to the third cache unit. In this way, this embodiment sets a three-level data cache management mechanism with a clear structure, clear boundaries of each level of data cache, controllable and configurable memory resource occupancy, clear logic, portability and replicability, which can make the odor gas monitoring system run better.

[0051] The modules or units in the device of the embodiment of the present invention can be combined, divided and deleted according to actual needs. The above disclosure is only the preferred embodiment of the present invention, and of course it cannot be used to limit the scope of the rights of the present invention. Those skilled in the art can understand that all or part of the processes of the above embodiment are implemented, and the equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A peculiar smell gas monitoring system suitable for industrial parks, characterized in that: The system includes: an odor collection terminal, a server and a client; the odor collection terminal is connected to the server via WB-IoT communication, and the server and the client are connected via Ethernet communication; The odor collection terminal includes a sensor component, a main control module and a communication module. The sensor component includes a sensor array, wherein the sensor array integrates at least two odor sensors, and each odor sensor uses a different metal oxide as a gas reactant; the sensor array is used to collect odor data in the industrial park and send the collected odor data to the main control module; the main control module sends the collected odor data to the server through the communication module; The server includes a communication server and an odor recognition server, wherein the communication server is used to receive the odor data sent by the communication module and send the odor data to the odor recognition server; the odor recognition server is used to recognize the odor data, obtain an odor recognition result, and send the odor recognition result to the client; the client includes an odor recognition result visualization APP, which is used to display the odor recognition result of the current odorous gas sent by the server; The main control module includes: a first cache unit, a second cache unit and a third cache unit; the queue length of the first cache unit is set to 5, the queue length of the second cache unit is set to 100, and the queue length of the third cache unit is set to 5; the first cache unit is used to receive odor data from the sensor array at intervals, and store it in the first cache unit after format conversion and packaging; the second cache unit receives the odor data stored in the first cache unit in real time, and first stores it in the second cache unit, and then determines whether the queue length of the third cache unit is less than 5; if it is less than 5, the odor data is obtained from the second cache unit and sent to the third cache unit; if the queue length of the third cache unit is equal to 5, the odor data continues to be cached in the second cache unit, and when the queue data of the second cache unit is greater than 80, the second cache unit takes out the data in the queue and saves it in a non-volatile memory device; When the length of the second cache queue is less than 10, the second cache unit detects whether there is data in the non-volatile memory device; if there is data, 20 pieces of data are read at one time to the queue of the second cache unit for caching, and are sent to the third cache unit in sequence; when the length of the second cache unit is less than 10 again, 20 pieces of data are read from the non-volatile memory again, and the cycle is repeated in sequence until all data are sent; The third cache unit is used to send the odor data sent by the second cache unit to the server through the communication module, and each time a piece of data is successfully sent, the current queue length of the third cache unit is reduced by one; if the queue length of the third cache unit is equal to 5, the second cache unit will no longer send data to the third cache unit.

2. The odor gas monitoring system suitable for industrial parks according to claim 1 is characterized in that: The sensor assembly includes a first gas channel and a first filter device. The first gas channel is used to connect the sensor array and the first filter device. The first filter device is used to filter large particles in the gas to be monitored.

3. The odor gas monitoring system suitable for industrial parks according to claim 2 is characterized in that: The sensor assembly further includes a second gas channel, a second filter device and an electromagnetic valve, wherein the second gas channel is used to connect the first gas channel and the sensor array, and the second filter device is arranged on the second gas channel to sterilize and filter the gas passing through the second gas channel; the electromagnetic valve is arranged at a position where the first gas channel is connected to the second gas channel; The solenoid valve is electrically connected to the main control module and is used to control the flow channel of the gas to be monitored; the main control module is used to calibrate the sensor array using the gas sterilized and filtered by the second filter device when the solenoid valve controls the gas to be monitored to flow through the second gas pipeline.

4. The odor gas monitoring system suitable for industrial parks according to claim 3 is characterized in that: The main control module is also used to control the electromagnetic valve to close the first gas channel and open the second gas channel at every preset time interval, so as to perform regular calibration on the sensor array.

5. The odor gas monitoring system suitable for industrial parks according to claim 2 is characterized in that: An air pump is also provided at the front end of the first filtering device, and the air pump is communicatively connected with the main control module; the main control module is used to control the operation of the air pump to actively introduce the gas to be monitored into the gas channel.

6. The odor gas monitoring system suitable for industrial parks according to claim 5 is characterized in that: The main control module is also used to obtain the meteorological information of the gas monitoring area in real time, and dynamically control the operating power of the air pump by PWM driving according to the acquired meteorological information.

7. The odorous gas monitoring system suitable for industrial parks according to claim 6 is characterized in that: The main control module is used to control the air pump using a PWM wave with a first duty cycle when the wind force in the gas monitoring area is not greater than level 4; to control the air pump using a PWM wave with a first duty cycle when the wind force in the gas monitoring area is greater than level 4 and less than level 6; and to control the air pump using a PWM wave with a third duty cycle when the wind force in the gas monitoring area is not less than level 6; wherein the first duty cycle>the second duty cycle>the third duty cycle.

8. The odor gas monitoring system suitable for industrial parks according to claim 1 is characterized in that: The odor recognition server is pre-configured with an odor recognition model, and the training method of the odor recognition model includes: Acquire at least two sample training sets; wherein each sample training set includes: a set of sample odor data and a label for defining the type of odorous gas corresponding to the sample training set, and each set of sample odor data includes odor data collected historically by at least one odor sensor in the sensor array; The at least two sample training sets are used to perform model training to obtain the odor recognition model.

9. The odorous gas monitoring system suitable for industrial parks according to claim 8 is characterized in that: The types of labels of each sample training set for training the odor recognition model can cover the types of odorous gases that may appear in the industrial park.

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