Remote calibration method and device for hazardous gas alarm, medium and electronic equipment

Abstract

The invention relates to a hazardous gas alarm remote calibration method and device, a medium and electronic equipment, and relates to the technical field of alarm calibration, and the method comprises the steps: determining a first hazardous gas concentration of a target position where a hazardous gas alarm is located according to a target electric signal; acquiring a second hazardous gas concentration actually displayed by the hazardous gas alarm through a camera, and calculating a first difference absolute value between the first hazardous gas concentration and the second hazardous gas concentration; if the absolute value of the first difference value is not smaller than the threshold value of the difference value, at least one group of third hazardous gas concentrations actually displayed by the hazardous gas alarm are obtained again; according to each third hazardous gas concentration, the reading displayed by the hazardous gas alarm is remotely calibrated. The dangerous gas alarm calibration method and device have the effect of reducing the dangerous degree during calibration of the dangerous gas alarm.

Description

Technical Field

[0001] The present application relates to the technical field of alarm calibration, and in particular to a method, device, medium and electronic equipment for remote calibration of a hazardous gas alarm. Background Art

[0002] A hazardous gas alarm refers to a device that monitors the concentration of hazardous gases in the environment and sounds an alarm when the concentration is too high. Its core component is a built-in gas sensor. The gas sensor detects the concentration of hazardous gases in the air. When the detected concentration exceeds the predetermined safety value, the alarm will sound an alarm signal. In the process of oil extraction, coal mining, or industrial production, many different types of hazardous gases are often produced. In the face of these gases, it is often necessary to install and use hazardous gas alarms in the process of mining, mining, and industrial production to detect and alarm these harmful hazardous gases to prevent hazardous gases from causing harm to personnel.

[0003] At present, after the hazardous gas alarm is installed, it is usually necessary to calibrate the hazardous gas alarm so that it can detect the concentration of hazardous gas more accurately. The commonly used calibration method is: the operator is required to strictly follow the calibration regulations and wear protective equipment. After the hazardous gas alarm is activated, the operator introduces a known concentration of hazardous gas into the pipeline, then observes the reading on the hazardous gas alarm, compares the reading on the hazardous gas alarm with the known concentration of the hazardous gas, and then calibrates the hazardous gas alarm. However, this method requires the operator to operate on site, resulting in a high degree of danger when calibrating the hazardous gas alarm. Summary of the invention

[0004] In order to reduce the degree of danger when calibrating a hazardous gas alarm, the present application provides a method, device, medium and electronic equipment for remote calibration of a hazardous gas alarm.

[0005] In a first aspect of the present application, a method for remote calibration of a hazardous gas alarm is provided, which specifically includes: Obtaining a target electrical signal corresponding to the dangerous gas concentration sent by the dangerous gas alarm to be calibrated; Determining a first hazardous gas concentration at a target location where the hazardous gas alarm is located according to the target electrical signal; Acquire the second dangerous gas concentration actually displayed by the dangerous gas alarm through a camera, and calculate a first absolute value of a difference between the first dangerous gas concentration and the second dangerous gas concentration; If the absolute value of the first difference is not less than the difference threshold, re-obtaining at least one set of third dangerous gas concentrations actually displayed by the dangerous gas alarm; According to each of the third hazardous gas concentrations, the indication displayed by the hazardous gas alarm is remotely calibrated.

[0006] By adopting the above technical solution, the first dangerous gas concentration of the target position actually detected by the gas sensor in the dangerous gas alarm is determined according to the target electrical signal sent by the dangerous gas alarm, and then the second dangerous gas concentration actually displayed by the current dangerous gas alarm is obtained in real time through the camera. Further, the first difference absolute value between the first dangerous gas concentration and the second dangerous gas concentration is calculated. If the first difference absolute value is greater than or equal to the difference threshold, it means that the deviation between the dangerous gas concentration actually displayed by the dangerous gas alarm and the actual dangerous gas concentration at the target position is large, indicating that the indication error displayed by the dangerous gas alarm is large and needs to be calibrated. Finally, according to each third dangerous gas concentration, the cause of the indication error is analyzed, and then the dangerous gas alarm is remotely calibrated in a targeted manner, thereby avoiding the operator from calibrating the dangerous gas alarm on site, and using remote calibration to reduce the danger of calibrating the dangerous gas alarm.

[0007] Optionally, the remotely calibrating the indication displayed by the hazardous gas alarm according to each of the third hazardous gas concentrations specifically includes: Determining a corresponding concentration fluctuation curve according to each of the third hazardous gas concentrations; Fitting the concentration fluctuation curve with a preset standard concentration fluctuation curve to obtain a fluctuation fitting rate, wherein the standard concentration fluctuation curve is a concentration variation curve detected when the hazardous gas sensor in the hazardous gas alarm has a sensitivity problem; If the fluctuation fitting rate exceeds a preset first fitting rate threshold, a first calibration scheme is selected from a calibration scheme library, and the indication displayed by the hazardous gas alarm is remotely calibrated by the first calibration scheme, wherein the first calibration scheme is a calibration scheme for the hazardous gas alarm based on the sensitivity problem of the hazardous gas sensor; If the fluctuation fitting rate does not exceed the first fitting rate threshold, a second calibration scheme is selected from the calibration scheme library, and the indication displayed by the hazardous gas alarm is remotely calibrated through the second calibration scheme. The second calibration scheme is a calibration scheme for the hazardous gas alarm based on its own indication display problem.

[0008] By adopting the above technical scheme, if the fluctuation fitting rate exceeds the first fitting rate threshold, it means that the concentration fluctuation curve is relatively similar to the standard concentration fluctuation curve, which further indicates that the indication error displayed by the hazardous gas alarm is large, which is mainly caused by the sensitivity problem of the hazardous gas sensor inside it. In this case, the indication displayed by the hazardous gas alarm is remotely calibrated through the first calibration scheme; if the fluctuation fitting rate does not exceed the first fitting rate threshold, the concentration fluctuation curve is poorly similar to the standard concentration fluctuation curve, which means that the indication error displayed by the hazardous gas alarm is large, which is mainly caused by the deviation of the indication display of the hazardous gas alarm itself, and there is no sensitivity problem with the hazardous gas sensor. In this case, the indication displayed by the hazardous gas alarm is remotely calibrated through the second calibration scheme, thereby achieving targeted remote calibration.

[0009] Optionally, the method further includes: Determine the source of the dangerous gas at the target location and obtain the current wind speed. If the wind speed is less than the wind speed threshold, collect at least one set of fourth dangerous gas concentrations from the source to the target location by using an environmental protection drone; According to each of the fourth hazardous gas concentrations, a corresponding first concentration variation curve is determined, and the first concentration variation curve is fitted with a preset first standard gas diffusion curve to obtain a first fitting rate, where the first standard gas diffusion curve is a concentration variation curve of the hazardous gas when it diffuses freely from a generation source; If the first fitting rate exceeds a preset second fitting rate threshold, obtaining the fifth dangerous gas concentration actually displayed by the dangerous gas alarm after remote calibration, and determining a corresponding second concentration change curve according to the fifth dangerous gas concentration and each of the fourth dangerous gas concentrations; The second concentration variation curve is fitted with the first standard gas diffusion curve to obtain a second fitting rate. If the second fitting rate exceeds the second fitting rate threshold, it is determined that the remote calibration of the hazardous gas alarm is successful.

[0010] By adopting the above technical solution, if the first fitting rate exceeds the preset second fitting rate threshold, it means that the first concentration change curve is relatively similar to the first standard gas diffusion curve, and the first concentration change curve is consistent with the concentration change of the dangerous gas from the source of free diffusion to the target position, indicating that the fourth dangerous gas concentration detected by this environmental protection drone is highly accurate, and then the fourth dangerous gas concentration is determined to be relatively accurate. Further, if the second fitting rate also exceeds the second fitting rate threshold, it means that the second concentration change curve is consistent with the concentration change of the dangerous gas from the source of free diffusion to the target position, and then the fifth dangerous gas concentration actually displayed by the remotely calibrated dangerous gas alarm is relatively accurate and close to the actual dangerous gas concentration at the target position, then it is finally determined that the remote calibration of the dangerous gas alarm is successful, thereby further verifying the effectiveness of the remote calibration.

[0011] Optionally, the method further includes: If the wind speed is not less than the wind speed threshold, collecting at least one set of sixth hazardous gas concentrations along the wind direction with the generation source as the starting point by the environmental protection drone; Determine a third concentration variation curve according to each of the sixth hazardous gas concentrations, and fit the third concentration variation curve with a preset second standard gas diffusion curve to obtain a third fitting rate, wherein the second standard gas diffusion curve is a concentration variation curve of the hazardous gas when it diffuses from a generation source to downstream with wind; If the third fitting rate exceeds the second fitting rate threshold, the hazardous gas reference concentration at the target location is collected by the environmental protection drone, and the hazardous gas verification concentration actually displayed by the hazardous gas alarm after remote calibration is obtained; When the absolute value of the second difference between the hazardous gas reference concentration and the hazardous gas verification concentration is less than the difference threshold, it is determined that the remote calibration of the hazardous gas alarm is successful.

[0012] By adopting the above technical solution, if the current wind speed is not less than the wind speed threshold, it means that the current wind speed is relatively high, and the dangerous gas generated by the source mainly diffuses downstream with the wind. Based on this, the third concentration change curve is determined and fitted with the second standard gas diffusion curve to obtain the third fitting rate. If the third fitting rate exceeds the second fitting rate threshold, it means that the accuracy of the environmental protection drone in detecting the concentration of dangerous gases is relatively high. Then, the reference concentration of dangerous gases at the target location collected by this environmental protection drone is closer to the actual concentration of dangerous gases. Furthermore, if the absolute value of the second difference is less than the difference threshold, it means that the actual concentration displayed by the current dangerous gas alarm is relatively accurate, and it is determined that the remote calibration of the dangerous gas alarm is successful.

[0013] Optionally, the method further includes: Based on the current wind direction, determining whether the coverage area of ​​the dangerous gas alarm concentration detection is in the downstream area of ​​the generation source; If yes, determining a first diffusion time length of the dangerous gas from the generation source to the coverage area; Compare the first diffusion time with a preset first time threshold, and if the first diffusion time is less than the first time threshold, determine whether there is a first personnel activity area in the coverage area; If yes, determining a second fitting rate threshold according to the first diffusion time, the smaller the first diffusion time, the larger the second fitting rate threshold; If not, a second fitting rate threshold is determined according to the personnel activity area in the downstream area of ​​the coverage area in the wind direction.

[0014] By adopting the above technical solution, if the first diffusion time is less than the first time threshold, it means that under the current wind speed, the time for the dangerous gas to diffuse from the source to the coverage area is short. Furthermore, if it is determined that there is a personnel activity area in the coverage area, that is, the first personnel activity area, then according to the first diffusion time, the corresponding second fitting rate threshold is determined. The shorter the first diffusion time, the shorter the time for the dangerous gas to diffuse into the coverage area, the faster the concentration of the dangerous gas in the coverage area rises, and the larger the second fitting rate threshold is required. In this way, the standard for verifying the accuracy of concentration detection of environmental protection drones is higher, the standard for determining the success of remote calibration of dangerous gas alarms is higher, the accuracy of remote calibration of dangerous gas alarms is higher, and the alarm is more accurate when the concentration of dangerous gas is too high, effectively reducing the risk of dangerous gas harm to personnel.

[0015] Optionally, determining the second fitting rate threshold according to the personnel activity area in the downstream area of ​​the coverage area in the wind direction specifically includes: Selecting a second personnel activity area closest to the coverage area from the personnel activity areas in the downstream area of ​​the coverage area in the wind direction; Determining a second diffusion time of the hazardous gas from the coverage area to the second personnel activity area; If the second diffusion time is less than a preset second time threshold, a second fitting rate threshold is determined according to the second diffusion time, and the smaller the second diffusion time is, the larger the second fitting rate threshold is.

[0016] By adopting the above technical solution, if the second diffusion time is less than the preset second time threshold, it means that the dangerous gas in the covered area will diffuse to the second personnel activity area faster, and the corresponding second fitting rate threshold is determined accordingly. The shorter the second diffusion time, once the dangerous gas concentration in the covered area is high, it will diffuse to the second personnel activity area faster with the wind, causing the dangerous gas concentration in the second personnel activity area to rise faster. The larger the corresponding second fitting rate threshold needs to be, so that the standard for determining the success of the remote calibration of the dangerous gas alarm is higher, the accuracy of the remote calibration of the dangerous gas alarm is higher, and the alarm is more accurate when the dangerous gas concentration is too high, thereby effectively reducing the risk of dangerous gas harm to personnel.

[0017] Optionally, the method further includes: Determining the maximum warning range of the hazardous gas alarm, and judging whether the second personnel activity area is within the maximum warning range; If the second personnel activity area is not within the maximum warning range, determining the second personnel activity area as a dangerous gas alarm blind area; An inspection reminder corresponding to the hazardous gas alarm blind area is sent to the terminal of the inspection personnel, and the inspection reminder is used to remind the inspection personnel to detect the hazardous gas concentration in the hazardous gas alarm blind area.

[0018] By adopting the above technical solution, if the second personnel activity area is not within the maximum warning range, it means that under the premise that the dangerous gas in the covered area spreads quickly to the second personnel activity area, the personnel in the second personnel activity area cannot perceive the dangerous warning of the dangerous gas alarm, which further indicates that the risk of harm to personnel by dangerous gases in the second personnel activity area is high. In this case, the second personnel activity area is determined as a dangerous gas alarm blind spot, and further, an inspection reminder is sent to the inspection personnel, so that the inspection personnel go to the field to monitor the concentration of dangerous gases in the dangerous gas alarm blind spot, thereby reducing the risk of harm to personnel by dangerous gases.

[0019] In a second aspect of the present application, a remote calibration device for a hazardous gas alarm is provided, specifically comprising: A signal acquisition module, used to acquire a target electrical signal corresponding to the dangerous gas concentration sent by the dangerous gas alarm to be calibrated; A concentration determination module, used to determine a first dangerous gas concentration at a target location where the dangerous gas alarm is located according to the target electrical signal; a difference calculation module, used for obtaining, through a camera, the second dangerous gas concentration actually displayed by the dangerous gas alarm, and calculating a first absolute value of a difference between the first dangerous gas concentration and the second dangerous gas concentration; a concentration reacquisition module, configured to reacquire at least one set of third hazardous gas concentrations actually displayed by the hazardous gas alarm if the absolute value of the first difference is not less than a difference threshold; The remote calibration module is used to remotely calibrate the indication displayed by the hazardous gas alarm according to the concentration of each third hazardous gas.

[0020] By adopting the above technical solution, the signal acquisition module acquires the target electrical signal, the concentration determination module determines the first hazardous gas concentration at the target position according to the target electrical signal, and then the difference calculation module acquires the second hazardous gas concentration actually displayed by the hazardous gas alarm, and calculates the first absolute difference between the first hazardous gas concentration and the second hazardous gas concentration. Then, the concentration recovery module reacquires the third hazardous gas concentration when the absolute value of the first difference is not less than the difference threshold, and finally the remote calibration module remotely calibrates the hazardous gas alarm according to each third hazardous gas concentration.

[0021] In a third aspect of the present application, a computer-readable storage medium is provided, in which a computer program is stored. When the computer program is loaded and executed by a processor, the method steps described in any one of the first aspects are performed.

[0022] In a fourth aspect of the present application, an electronic device is provided, specifically comprising: A processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein the processor is used to load and execute the computer program stored in the memory so that the electronic device performs the method as described in any one of the first aspects.

[0023] In summary, the present application includes at least one of the following beneficial technical effects: calculating the absolute value of the first difference between the first hazardous gas concentration and the second hazardous gas concentration. If the absolute value of the first difference is greater than or equal to the difference threshold, it means that the deviation between the hazardous gas concentration actually displayed by the hazardous gas alarm and the actual hazardous gas concentration at the target position is large, indicating that the indication error displayed by the hazardous gas alarm is large and needs to be calibrated. Finally, according to each third hazardous gas concentration, the cause of the indication error is analyzed, and then the hazardous gas alarm is remotely calibrated in a targeted manner, thereby avoiding the operator from calibrating the hazardous gas alarm on site, and using remote calibration to reduce the risk of calibrating the hazardous gas alarm. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a flowchart of a method for remote calibration of a hazardous gas alarm provided in an embodiment of the present application; Figure 2It is a flowchart of another method for remote calibration of a hazardous gas alarm provided in an embodiment of the present application; Figure 3 It is a structural schematic diagram of a remote calibration device for a hazardous gas alarm provided in an embodiment of the present application; Figure 4 It is a structural schematic diagram of another remote calibration device for hazardous gas alarm provided in an embodiment of the present application.

[0025] Explanation of the accompanying drawings: 11. Signal acquisition module; 12. Concentration determination module; 13. Difference calculation module; 14. Concentration recovery module; 15. Remote calibration module; 16. First verification module; 17. Second verification module; 18. Threshold determination module; 19. Blind spot determination module. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments.

[0027] In the description of the embodiments of the present application, words such as "illustrative", "for example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "illustrative", "for example" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "illustrative", "for example" or "for example" is intended to present related concepts in a concrete way.

[0028] In the description of the embodiments of the present application, the term "and / or" is only a kind of association relationship describing the associated objects, indicating that there may be three kinds of relationships, for example, A and / or B, which can represent: A exists alone, B exists alone, and A and B exist at the same time. In addition, unless otherwise specified, the meaning of the term "multiple" refers to two or more. For example, multiple systems refer to two or more systems, and multiple screen terminals refer to two or more screen terminals. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the indicated technical features. Thus, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. The terms "include", "comprise", "have" and their variations all mean "including but not limited to", unless otherwise specifically emphasized.

[0029] See also Figure 1The present application embodiment discloses a flowchart of a method for remote calibration of a hazardous gas alarm, which can be implemented by a computer program or run on a remote calibration device for a hazardous gas alarm based on a von Neumann system. The computer program can be integrated into an application or run as an independent tool application, specifically including: S101: Acquire a target electrical signal corresponding to the hazardous gas concentration sent by the hazardous gas alarm to be calibrated.

[0030] Specifically, in the embodiments of the present application, the hazardous gas alarm is mainly set in the oil extraction scene or the coal mining scene. In other embodiments, it can also be set in the industrial production scene. These scenes usually produce gases that are harmful to the human body, and it is necessary to detect the concentration of hazardous gases through the hazardous gas alarm and alarm in time. Once the hazardous gas concentration displayed by the hazardous gas alarm is greatly different from the actual hazardous gas concentration, the hazardous gas alarm will falsely alarm or alarm in time, resulting in poor monitoring accuracy and safety of hazardous gases in the production process. Therefore, it is necessary to calibrate the hazardous gas alarm.

[0031] Furthermore, a remote calibration method for a hazardous gas alarm disclosed in an embodiment of the present application is applied to a remote calibration terminal, that is, the execution subject is a remote calibration terminal, and the remote calibration terminal is a personal computer. The hazardous gas alarm is directly or indirectly connected to the remote calibration terminal through a wired or wireless network. A feasible way to obtain a current signal: the hazardous gas sensor in the hazardous gas alarm to be calibrated converts the detected hazardous gas concentration into an electrical signal, and then the electrical signal is amplified and processed by a signal amplifier modulator in the hazardous gas alarm to obtain a target electrical signal, thereby facilitating subsequent processing and analysis of the electrical signal, and the hazardous gas alarm sends the target electrical signal to the remote calibration terminal, and finally the remote calibration terminal obtains the target electrical signal. It should be noted that the hazardous gas sensor is a graphene gas sensor, and in other embodiments, the hazardous gas sensor may also be an electrochemical sensor. The target electrical signal is an analog signal. Among them, the signal amplifier modulator is mainly used to amplify weak signals and modulate them to a specific frequency for easy transmission and processing.

[0032] S102: Determine a first hazardous gas concentration at a target location where the hazardous gas alarm is located according to the target electrical signal.

[0033] Specifically, after the remote calibration terminal obtains the target electrical signal, the noise or interference components contained in the target electrical signal are eliminated through a preset filter, thereby improving the signal-to-noise ratio of the target electrical signal. Furthermore, the target electrical signal is converted into a corresponding digital signal through an analog-to-digital converter (ADC), thereby determining the actual hazardous gas concentration at the target location where the hazardous gas alarm is located, that is, the first hazardous gas concentration. It should be noted that an analog-to-digital converter, i.e., an A / D converter, generally refers to an electronic component that converts an analog signal into a digital signal. A typical analog-to-digital converter converts an input electrical signal into an output digital signal.

[0034] S103: Acquire the second hazardous gas concentration actually displayed by the hazardous gas alarm through a camera, and calculate a first absolute value of a difference between the first hazardous gas concentration and the second hazardous gas concentration.

[0035] Specifically, after the first dangerous gas concentration at the target location is determined, the second dangerous gas concentration actually displayed by the dangerous gas alarm is obtained through a preset camera, wherein the camera is set at the target location to monitor the indication displayed by the dangerous gas alarm. A feasible acquisition method is: obtain an image of the display screen of the dangerous gas alarm through a camera, and then identify the information in the image through a preset image information recognition model, and then determine the second dangerous gas concentration actually displayed by the dangerous gas alarm. The image information recognition model can be a trained convolutional neural network model. In other embodiments, it can also be a trained recurrent neural network model. The training process is: input the image samples marked with specific information in the figure into the convolutional neural network model for training, so that the model continuously learns the ability to recognize information in the image, and finally obtains the image information recognition model. This is a prior art and will not be repeated here. Furthermore, the first hazardous gas concentration and the second hazardous gas concentration are subtracted to obtain a difference, and the absolute value of the difference is taken to obtain a first absolute value of the difference, thereby effectively determining the deviation between the hazardous gas concentration actually displayed by the hazardous gas alarm and the actual hazardous gas concentration at the target location, thereby facilitating subsequent remote calibration of the hazardous gas alarm, that is, calibrating the indication displayed by the hazardous gas alarm.

[0036] S104: If the absolute value of the first difference is not less than the difference threshold, reacquiring at least one set of third hazardous gas concentrations actually displayed by the hazardous gas alarm.

[0037] Specifically, the absolute value of the first difference is compared with the preset difference threshold. If the absolute value of the first difference is greater than or equal to the difference threshold, it means that the deviation between the dangerous gas concentration actually displayed by the dangerous gas alarm and the actual dangerous gas concentration at the target position is large, indicating that the indication error displayed by the dangerous gas alarm is large and calibration is required. Then the dangerous gas alarm is controlled to re-detect the dangerous gas concentration, and at least one set of third dangerous gas concentrations actually displayed by the dangerous gas alarm is re-acquired through the camera. For details, please refer to step S103, which will not be repeated here.

[0038] S105: remotely calibrate the indication displayed by the hazardous gas alarm according to the concentration of each third hazardous gas.

[0039] In one achievable implementation, a corresponding concentration fluctuation curve is determined according to each third hazardous gas concentration; Fitting the concentration fluctuation curve with a preset standard concentration fluctuation curve to obtain a fluctuation fitting rate; If the fluctuation fitting rate exceeds a preset first fitting rate threshold, a first calibration scheme is selected from a calibration scheme library, and the indication displayed by the hazardous gas alarm is remotely calibrated by the first calibration scheme; If the fluctuation fitting rate does not exceed the first fitting rate threshold, a second calibration scheme is selected from the calibration scheme library, and the indication displayed by the hazardous gas alarm is remotely calibrated through the second calibration scheme.

[0040] Specifically, according to each third hazardous gas concentration, a corresponding concentration fluctuation curve is drawn through a preset matlab tool, that is, a curve showing the change of the hazardous gas concentration detected and displayed by the hazardous gas alarm with the detection time. Further, the concentration fluctuation curve is fitted with a preset standard concentration fluctuation curve through the matlab tool to obtain a fluctuation fitting rate, wherein the standard concentration fluctuation curve is a concentration change curve detected when the hazardous gas sensor in the hazardous gas alarm has a sensitivity problem. Sensitivity is a key indicator for measuring the responsiveness of the hazardous gas sensor to the hazardous gas concentration. Once a sensitivity problem occurs, such as a decrease in sensitivity, the accuracy of the hazardous gas concentration detected is not high, and the curve drawn according to the detected concentration usually exhibits characteristics such as large fluctuations and drift.

[0041] Furthermore, if the fluctuation fitting rate exceeds the first fitting rate threshold, it means that the concentration fluctuation curve is similar to the standard concentration fluctuation curve, which means that the indication error of the hazardous gas alarm is large, which is mainly caused by the sensitivity problem of the hazardous gas sensor inside it. Then, the first calibration scheme is selected from the preset calibration scheme library, that is, the calibration scheme of the hazardous gas alarm based on the sensitivity problem of the hazardous gas sensor, and the hazardous gas sensor is remotely calibrated through the first calibration scheme. In the embodiment of the present application, the hazardous gas sensor can be remotely calibrated through the TruCal adaptive calibration technology, so as to realize the remote calibration of the indication displayed by the hazardous gas alarm. Among them, the TruCal adaptive calibration technology is an advanced gas sensor calibration method, which adjusts the calibration parameters of the sensor through an intelligent algorithm.

[0042] If the fluctuation fitting rate does not exceed the first fitting rate threshold, the concentration fluctuation curve is poorly similar to the standard concentration fluctuation curve, indicating that the indication error displayed by the hazardous gas alarm is large, which is mainly caused by the deviation of the indication display of the hazardous gas alarm itself. The hazardous gas sensor does not have a sensitivity problem, which indicates that the first hazardous gas concentration is highly accurate and is closer to the actual hazardous gas concentration. Then select the second calibration scheme from the calibration scheme library, that is, the calibration scheme of the hazardous gas alarm based on its own indication display problem, and perform remote calibration through the second calibration scheme. The specific process can be: first, perform zero point calibration on the hazardous gas alarm to eliminate the initial deviation, and then perform range calibration on the hazardous gas alarm based on the absolute value of the first difference, so that it is more in line with the hazardous gas concentration range of the target location, and finally improve the accuracy of the indication display of the hazardous gas alarm. This is a prior art and will not be elaborated here.

[0043] See also Figure 2 , the embodiment of the present application discloses a flowchart of another method for remote calibration of a hazardous gas alarm, which can be implemented by a computer program or run on a remote calibration device for a hazardous gas alarm based on a von Neumann system. The computer program can be integrated into an application or run as an independent tool application, specifically including: S201: Acquire a target electrical signal corresponding to the hazardous gas concentration sent by the hazardous gas alarm to be calibrated.

[0044] S202: Determine a first hazardous gas concentration at a target location where the hazardous gas alarm is located according to the target electrical signal.

[0045] S203: Acquire the second hazardous gas concentration actually displayed by the hazardous gas alarm through a camera, and calculate a first absolute value of a difference between the first hazardous gas concentration and the second hazardous gas concentration.

[0046] S204: If the absolute value of the first difference is not less than the difference threshold, reacquire at least one set of third hazardous gas concentrations actually displayed by the hazardous gas alarm.

[0047] S205: remotely calibrate the indication displayed by the hazardous gas alarm according to the concentration of each third hazardous gas.

[0048] For details, please refer to steps S101-S105, which will not be described in detail here.

[0049] S206: Determine the source of the hazardous gas at the target location and obtain the current wind speed. If the wind speed is less than the wind speed threshold, collect at least one set of fourth hazardous gas concentrations from the source to the target location through an environmental protection drone.

[0050] Specifically, after remotely calibrating the hazardous gas alarm, the source of the hazardous gas at the target location is determined, that is, the source of the hazardous gas. A feasible way to obtain the information is to receive the location information of the source sent by the terminal of the security personnel. The terminal can be a smart phone, a tablet computer or a personal computer. The current wind speed is obtained through the preset wind speed sensor at the target location. If the wind speed is less than the preset wind speed threshold, it means that the wind speed is small and the hazardous gas mainly relies on the free diffusion mechanism to diffuse from the source to the surroundings. Furthermore, the environmental protection drone is controlled to collect at least one set of fourth hazardous gas concentrations on the way from the source to the target location. In the embodiment of the present application, the environmental protection drone is mainly used to detect the concentration of hazardous gases.

[0051] S207: Determine a corresponding first concentration variation curve according to each fourth hazardous gas concentration, and fit the first concentration variation curve with a preset first standard gas diffusion curve to obtain a first fitting rate.

[0052] S208: If the first fitting rate exceeds a preset second fitting rate threshold, the fifth hazardous gas concentration actually displayed by the hazardous gas alarm after remote calibration is obtained, and the corresponding second concentration change curve is determined according to the fifth hazardous gas concentration and each fourth hazardous gas concentration.

[0053] Specifically, after each fourth dangerous gas concentration is determined, the corresponding first concentration change curve is drawn according to each fourth dangerous gas concentration through the matlab tool, that is, the curve of the concentration change of the dangerous gas on the way from the source to the target position. Further, the first concentration change curve is fitted with the preset first standard gas diffusion curve to obtain the first fitting rate. The first standard gas diffusion curve is the concentration change curve of the dangerous gas when it diffuses freely from the source. If the first fitting rate exceeds the preset second fitting rate threshold, it means that the first concentration change curve is similar to the first standard gas diffusion curve, and the first concentration change curve is consistent with the concentration change of the dangerous gas on the way from the source to the target position, indicating that the accuracy of the fourth dangerous gas concentration detected by this environmental protection drone is high, then this environmental protection drone is determined as a verified drone, that is, an environmental protection drone that has passed the accuracy verification of the detection of dangerous gas concentrations.

[0054] Furthermore, the fifth dangerous gas concentration actually displayed by the remotely calibrated dangerous gas alarm is retrieved through the camera, and then the second concentration change curve is drawn according to the fourth dangerous gas concentrations and the fifth dangerous gas concentration through the MATLAB tool, that is, the concentration change curve of the dangerous gas diffused from the source to the target position.

[0055] S209: Fitting the second concentration variation curve with the first standard gas diffusion curve to obtain a second fitting rate. If the second fitting rate exceeds a second fitting rate threshold, it is determined that the remote calibration of the hazardous gas alarm is successful.

[0056] Specifically, the second concentration change curve is fit with the first standard gas diffusion curve through the MATLAB tool to obtain the second fitting rate. If the second fitting rate also exceeds the second fitting rate threshold, it means that the second concentration change curve is consistent with the concentration change of the hazardous gas from the source of generation to the target position. It further indicates that the fifth hazardous gas concentration actually displayed by the hazardous gas alarm after this remote calibration is more accurate and closer to the actual hazardous gas concentration at the target position. It is finally determined that the remote calibration of the hazardous gas alarm is successful, thereby further verifying the effectiveness of the remote calibration.

[0057] In other embodiments, if the current wind speed is not less than the wind speed threshold, it means that the current wind speed is large, and the dangerous gas from the source mainly diffuses downstream with the wind. Then, the environmental protection drone is controlled to take the source as the starting point, fly downstream along the wind direction, collect at least one set of sixth dangerous gas concentrations, and draw a third concentration change curve according to each sixth dangerous gas concentration. Then, the third concentration change curve is fitted with the preset second standard gas diffusion curve to obtain a third fitting rate, wherein the second standard gas diffusion curve is a concentration change curve when the dangerous gas diffuses downstream from the source with the wind. If the third fitting rate exceeds the second fitting rate threshold, it means that the accuracy of the environmental protection drone in detecting the dangerous gas concentration is high, then the dangerous gas reference concentration at the target location is collected by this environmental protection drone, that is, it is closer to the actual dangerous gas concentration, and the environmental protection drone is determined as a verified drone. And through the camera, the dangerous gas verification concentration actually displayed by the remotely calibrated dangerous gas alarm is obtained. Finally, the second difference absolute value between the dangerous gas reference concentration and the dangerous gas verification concentration is determined. If the second difference absolute value is less than the difference threshold, it means that the concentration actually displayed by the current dangerous gas alarm is relatively accurate, and it is determined that the remote calibration of the dangerous gas alarm is successful.

[0058] In another embodiment, before determining whether the remote calibration of the hazardous gas alarm is successful, the current wind direction is determined by a wind direction sensor. Under this wind direction, it is determined whether the coverage area of ​​the concentration detection of the hazardous gas alarm is in the downstream area of ​​the source. The coverage area is specifically determined based on the location information of the target location and the distance range of the concentration detection of the hazardous gas alarm. If it is, it means that when the hazardous gas diffuses from the source downstream with the wind, it will diffuse into the coverage area. Then, based on the location information of the coverage area and the source, the distance between the two is determined, and the distance is divided by the wind speed to obtain the first diffusion time of the hazardous gas from the source to the coverage area. If the first diffusion time is less than the first time threshold, it means that under the current wind speed, the hazardous gas diffuses from the source to the coverage area. The time of the area is shorter. Furthermore, the image of this coverage area is taken by the drone, and the image is identified. If a person is identified, it is determined that there is a personnel activity area in the coverage area, that is, the first personnel activity area. Then, according to the first diffusion time, the corresponding second fitting rate threshold is matched from the preset fitting rate threshold first matching table. The shorter the first diffusion time, the shorter the time for the dangerous gas to diffuse into the coverage area, the faster the concentration of dangerous gases in the coverage area rises, and the larger the second fitting rate threshold is required. In this way, the standard for checking the accuracy of concentration detection of environmental protection drones is higher, the standard for determining the success of remote calibration of dangerous gas alarms is higher, the accuracy of remote calibration of dangerous gas alarms is higher, and the alarm is more accurate when the concentration of dangerous gas is too high, which effectively reduces the risk of dangerous gas harm to personnel. It should be noted that the first matching table of fitting rate thresholds includes different first diffusion time lengths and corresponding second fitting rate thresholds, which are all set based on human experience.

[0059] Furthermore, if the first personnel activity area does not exist in the coverage area, then according to the current wind direction, the second fitting rate threshold is determined for the personnel activity area in the downstream area of ​​the coverage area. One feasible method is to determine the various personnel activity areas in the downstream area of ​​the coverage area by taking images by a drone and identifying personnel, and then calculate the distance between each personnel activity area and the coverage area, and determine the personnel activity area with the smallest distance as the second personnel activity area.

[0060] Furthermore, the distance between the second personnel activity area and the coverage area is divided by the wind speed to obtain the second diffusion time of the dangerous gas from the coverage area to the second personnel activity area with the wind. If the second diffusion time is less than the preset second time threshold, it means that the dangerous gas in the coverage area will diffuse to the second personnel activity area quickly. Then the second fitting rate threshold corresponding to the second diffusion time is matched from the second matching table of the fitting rate threshold. The second matching table of the fitting rate threshold includes different second diffusion time and corresponding second fitting rate threshold, which are all set based on human experience. The smaller the second diffusion time, once the concentration of dangerous gas in the coverage area is high, it will diffuse to the second personnel activity area faster with the wind, so that the concentration of dangerous gas in the second personnel activity area rises faster. The larger the second fitting rate threshold needs to be, so that the standard for determining the success of the remote calibration of the dangerous gas alarm is higher, the higher the accuracy of the remote calibration of the dangerous gas alarm, and the more accurate the alarm when the concentration of dangerous gas is too high, thereby effectively reducing the risk of dangerous gas harm to personnel.

[0061] In another embodiment, the maximum warning range of the hazardous gas alarm is determined, and the specific determination method is: the maximum warning range sent by the receiving personnel terminal. In the embodiment of the present application, the maximum warning range is the maximum distance range that personnel can perceive when the hazardous gas alarm sounds an alarm. If the second personnel activity area is not within the maximum warning range, it means that under the premise that the hazardous gas in the coverage area spreads quickly to the second personnel activity area, the personnel in the second personnel activity area cannot perceive the dangerous warning of the hazardous gas alarm, which further indicates that the risk of harm to personnel by hazardous gases in the second personnel activity area is high, then this second personnel activity area is determined as a hazardous gas alarm blind area, and further, a patrol reminder is sent to the terminal of the patrol personnel. The patrol reminder is used to remind the patrol personnel to detect the concentration of hazardous gases in the hazardous gas alarm blind area, so that the patrol personnel go to the field to monitor the concentration of hazardous gases in the hazardous gas alarm blind area, thereby reducing the risk of harm to personnel by hazardous gases. The terminal can be a smart phone or a personal computer. In other embodiments, the drone can also be controlled to fly to the hazardous gas alarm blind area after verification to perform real-time hazardous gas monitoring.

[0062] The implementation principle of the remote calibration method for the hazardous gas alarm in the embodiment of the present application is: calculate the absolute value of the first difference between the first hazardous gas concentration and the second hazardous gas concentration. If the absolute value of the first difference is greater than or equal to the difference threshold, it means that the deviation between the hazardous gas concentration actually displayed by the hazardous gas alarm and the actual hazardous gas concentration at the target position is large, indicating that the indication error displayed by the hazardous gas alarm is large and calibration is required. Finally, according to each third hazardous gas concentration, the cause of the indication error is analyzed, and then the hazardous gas alarm is remotely calibrated in a targeted manner, thereby avoiding the operator from calibrating the hazardous gas alarm on site, and using remote calibration to reduce the risk of calibrating the hazardous gas alarm.

[0063] The following are device embodiments of the present application, which can be used to execute the method embodiments of the present application. For details not disclosed in the device embodiments of the present application, please refer to the method embodiments of the present application.

[0064] See also Figure 3 , is a schematic diagram of the structure of the remote calibration device for hazardous gas alarms provided in an embodiment of the present application. The remote calibration device for hazardous gas alarms can be implemented as all or part of the device through software, hardware, or a combination of both. The device includes a signal acquisition module 11, a concentration determination module 12, a difference calculation module 13, a concentration recovery module 14, and a remote calibration module 15.

[0065] A signal acquisition module 11, used to acquire a target electrical signal corresponding to the dangerous gas concentration sent by the dangerous gas alarm to be calibrated; A concentration determination module 12, for determining a first dangerous gas concentration at a target location where the dangerous gas alarm is located according to the target electrical signal; The difference calculation module 13 is used to obtain the second dangerous gas concentration actually displayed by the dangerous gas alarm through the camera, and calculate the first absolute value of the difference between the first dangerous gas concentration and the second dangerous gas concentration; A concentration re-acquisition module 14, configured to re-acquire at least one set of third dangerous gas concentrations actually displayed by the dangerous gas alarm if the absolute value of the first difference is not less than the difference threshold; The remote calibration module 15 is used to remotely calibrate the indication displayed by the hazardous gas alarm according to the concentration of each third hazardous gas.

[0066] Optionally, the remote calibration module 15 is specifically used for: According to each third hazardous gas concentration, determine a corresponding concentration fluctuation curve; The concentration fluctuation curve is fitted with a preset standard concentration fluctuation curve to obtain a fluctuation fitting rate, wherein the standard concentration fluctuation curve is a concentration variation curve detected when a dangerous gas sensor in a dangerous gas alarm has a sensitivity problem; If the fluctuation fitting rate exceeds a preset first fitting rate threshold, a first calibration scheme is selected from a calibration scheme library, and the indication displayed by the hazardous gas alarm is remotely calibrated by the first calibration scheme; If the fluctuation fitting rate does not exceed the first fitting rate threshold, a second calibration scheme is selected from the calibration scheme library, and the indication displayed by the hazardous gas alarm is remotely calibrated through the second calibration scheme.

[0067] Optional, such as Figure 4 As shown, the device also includes a first verification module 16, which is specifically used to: Determine the source of the dangerous gas at the target location and obtain the current wind speed. If the wind speed is less than the wind speed threshold, collect at least one set of fourth dangerous gas concentrations from the source to the target location through an environmental protection drone; According to each fourth hazardous gas concentration, a corresponding first concentration variation curve is determined, and the first concentration variation curve is fitted with a preset first standard gas diffusion curve to obtain a first fitting rate, where the first standard gas diffusion curve is a concentration variation curve when the hazardous gas freely diffuses from a generation source; If the first fitting rate exceeds a preset second fitting rate threshold, the fifth dangerous gas concentration actually displayed by the dangerous gas alarm after remote calibration is obtained, and the corresponding second concentration change curve is determined according to the fifth dangerous gas concentration and each fourth dangerous gas concentration; The second concentration variation curve is fitted with the first standard gas diffusion curve to obtain a second fitting rate. If the second fitting rate exceeds a second fitting rate threshold, it is determined that the remote calibration of the hazardous gas alarm is successful.

[0068] Optionally, the device further includes a second verification module 17, which is specifically used to: If the wind speed is not less than the wind speed threshold, at least one set of sixth hazardous gas concentrations is collected along the wind direction with the generation source as the starting point by the environmental protection drone; According to each sixth hazardous gas concentration, a third concentration variation curve is determined, and the third concentration variation curve is fitted with a preset second standard gas diffusion curve to obtain a third fitting rate, where the second standard gas diffusion curve is a concentration variation curve when the hazardous gas diffuses from a generation source to downstream with wind; If the third fitting rate exceeds the second fitting rate threshold, the reference concentration of hazardous gases at the target location is collected by the environmental protection drone, and the actual hazardous gas verification concentration displayed by the remotely calibrated hazardous gas alarm is obtained; When the absolute value of the second difference between the hazardous gas reference concentration and the hazardous gas verification concentration is less than the difference threshold, it is determined that the remote calibration of the hazardous gas alarm is successful.

[0069] Optionally, the device further includes a threshold determination module 18, which is specifically configured to: Based on the current wind direction, determine whether the coverage area of ​​the dangerous gas alarm concentration detection is in the downstream area of ​​the generation source; If yes, determining a first diffusion time length of the coverage area to which the hazardous gas diffuses from the generation source; Compare the first diffusion time with a preset first time threshold, and if the first diffusion time is less than the first time threshold, determine whether there is a first personnel activity area in the coverage area; If yes, then determine the second fitting rate threshold according to the first diffusion time, the smaller the first diffusion time, the larger the second fitting rate threshold; If not, a second fitting rate threshold is determined according to the personnel activity area in the downstream area of ​​the coverage area in the wind direction.

[0070] Optionally, the threshold determination module 18 is specifically configured to: Selecting a second personnel activity area closest to the coverage area from the personnel activity areas in the downstream area of ​​the coverage area in the wind direction; Determine a second diffusion time of the hazardous gas from the covered area to the second personnel activity area; If the second diffusion time is less than a preset second time threshold, a second fitting rate threshold is determined according to the second diffusion time. The smaller the second diffusion time, the larger the second fitting rate threshold.

[0071] Optionally, the device further includes a blind area determination module 19, which is specifically configured to: Determine the maximum warning range of the hazardous gas alarm and judge whether the second personnel activity area is within the maximum warning range; If the second personnel activity area is not within the maximum warning range, the second personnel activity area is determined as a dangerous gas alarm blind area; An inspection reminder corresponding to the hazardous gas alarm blind area is sent to the inspection personnel's terminal. The inspection reminder is used to remind the inspection personnel to detect the hazardous gas concentration in the hazardous gas alarm blind area.

[0072] It should be noted that the remote calibration device for a hazardous gas alarm provided in the above embodiment only uses the division of the above functional modules as an example when executing the remote calibration method for a hazardous gas alarm. In actual applications, the above functional distribution can be completed by different functional modules as needed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In addition, the remote calibration device for a hazardous gas alarm provided in the above embodiment and the embodiment of a remote calibration method for a hazardous gas alarm belong to the same concept. The implementation process is detailed in the method embodiment and will not be repeated here.

[0073] The embodiment of the present application further discloses a computer-readable storage medium, and the computer-readable storage medium stores a computer program, wherein when the computer program is executed by a processor, a remote calibration method for a hazardous gas alarm of the above embodiment is adopted.

[0074] Among them, the computer program can be stored in a computer-readable medium, the computer program includes computer program code, the computer program code can be in the form of source code, object code, executable file or certain middleware, etc. The computer-readable medium includes any entity or device that can carry the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the computer-readable medium includes but is not limited to the above-mentioned components.

[0075] Among them, through this computer-readable storage medium, a remote calibration method for a hazardous gas alarm in the above embodiment is stored in a computer-readable storage medium, and is loaded and executed on a processor to facilitate the storage and application of the above method.

[0076] An embodiment of the present application further discloses an electronic device, wherein a computer program is stored in a computer-readable storage medium, and when the computer program is loaded and executed by a processor, the above-mentioned remote calibration method for a hazardous gas alarm is adopted.

[0077] The electronic device may be a desktop computer, a laptop computer, a cloud server or other electronic device, and the electronic device includes but is not limited to a processor and a memory. For example, the electronic device may also include input and output devices, a network access device, and a bus.

[0078] Among them, the processor can adopt a central processing unit (CPU). Of course, according to actual usage, other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. can also be adopted. The general-purpose processor can adopt a microprocessor or any conventional processor, etc., and this application does not impose any restrictions on this.

[0079] Among them, the memory can be an internal storage unit of the electronic device, such as a hard disk or memory of the electronic device, or it can be an external storage device of the electronic device, such as a plug-in hard disk, a smart memory card (SMC), a secure digital card (SD) or a flash memory card (FC) equipped on the electronic device. Moreover, the memory can also be a combination of an internal storage unit and an external storage device of the electronic device. The memory is used to store computer programs and other programs and data required by the electronic device. The memory can also be used to temporarily store data that has been output or is to be output, and this application does not impose any restrictions on this.

[0080] Among them, through this electronic device, a remote calibration method for a hazardous gas alarm in the above embodiment is stored in the memory of the electronic device, and is loaded and executed on the processor of the electronic device, which is convenient for use.

[0081] The above is only an exemplary embodiment of the present disclosure, and the scope of the present disclosure cannot be limited thereto. That is, any equivalent changes and modifications made according to the teachings of the present disclosure are still within the scope of the present disclosure. After considering the specification and practicing the disclosure here, those skilled in the art will easily think of other embodiments of the present disclosure. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary technical means in the technical field not recorded in the present disclosure. The description and examples are only regarded as exemplary, and the scope and spirit of the present disclosure are defined by the claims.

Claims

1. A method for remote calibration of a hazardous gas alarm, characterized in that: Applied to a remote calibration terminal, the method comprises: Obtaining a target electrical signal corresponding to the dangerous gas concentration sent by the dangerous gas alarm to be calibrated; Determining a first hazardous gas concentration at a target location where the hazardous gas alarm is located according to the target electrical signal; Acquire the second dangerous gas concentration actually displayed by the dangerous gas alarm through a camera, and calculate a first absolute value of a difference between the first dangerous gas concentration and the second dangerous gas concentration; If the absolute value of the first difference is not less than the difference threshold, re-obtaining at least one set of third dangerous gas concentrations actually displayed by the dangerous gas alarm; According to each of the third hazardous gas concentrations, the indication displayed by the hazardous gas alarm is remotely calibrated.

2. The method for remote calibration of hazardous gas alarm according to claim 1, characterized in that: The remote calibration of the indication displayed by the hazardous gas alarm according to each of the third hazardous gas concentrations specifically includes: Determining a corresponding concentration fluctuation curve according to each of the third hazardous gas concentrations; Fitting the concentration fluctuation curve with a preset standard concentration fluctuation curve to obtain a fluctuation fitting rate, wherein the standard concentration fluctuation curve is a concentration variation curve detected when the hazardous gas sensor in the hazardous gas alarm has a sensitivity problem; If the fluctuation fitting rate exceeds a preset first fitting rate threshold, a first calibration scheme is selected from a calibration scheme library, and the indication displayed by the hazardous gas alarm is remotely calibrated by the first calibration scheme, wherein the first calibration scheme is a calibration scheme for the hazardous gas alarm based on the sensitivity problem of the hazardous gas sensor; If the fluctuation fitting rate does not exceed the first fitting rate threshold, a second calibration scheme is selected from the calibration scheme library, and the indication displayed by the hazardous gas alarm is remotely calibrated through the second calibration scheme. The second calibration scheme is a calibration scheme for the hazardous gas alarm based on its own indication display problem.

3. The method for remote calibration of hazardous gas alarm according to claim 1, characterized in that: After the method, it also includes: Determine the source of the dangerous gas at the target location and obtain the current wind speed. If the wind speed is less than the wind speed threshold, collect at least one set of fourth dangerous gas concentrations from the source to the target location by using an environmental protection drone; According to each of the fourth hazardous gas concentrations, a corresponding first concentration variation curve is determined, and the first concentration variation curve is fitted with a preset first standard gas diffusion curve to obtain a first fitting rate, where the first standard gas diffusion curve is a concentration variation curve of the hazardous gas when it diffuses freely from a generation source; If the first fitting rate exceeds a preset second fitting rate threshold, obtaining the fifth dangerous gas concentration actually displayed by the dangerous gas alarm after remote calibration, and determining a corresponding second concentration change curve according to the fifth dangerous gas concentration and each of the fourth dangerous gas concentrations; The second concentration variation curve is fitted with the first standard gas diffusion curve to obtain a second fitting rate. If the second fitting rate exceeds the second fitting rate threshold, it is determined that the remote calibration of the hazardous gas alarm is successful.

4. The method for remote calibration of hazardous gas alarm according to claim 3, characterized in that: The method further comprises: If the wind speed is not less than the wind speed threshold, collecting at least one set of sixth hazardous gas concentrations along the wind direction with the generation source as the starting point by the environmental protection drone; Determine a third concentration variation curve according to each of the sixth hazardous gas concentrations, and fit the third concentration variation curve with a preset second standard gas diffusion curve to obtain a third fitting rate, wherein the second standard gas diffusion curve is a concentration variation curve of the hazardous gas when it diffuses from a generation source to downstream with wind; If the third fitting rate exceeds the second fitting rate threshold, the hazardous gas reference concentration at the target location is collected by the environmental protection drone, and the hazardous gas verification concentration actually displayed by the hazardous gas alarm after remote calibration is obtained; When the absolute value of the second difference between the hazardous gas reference concentration and the hazardous gas verification concentration is less than the difference threshold, it is determined that the remote calibration of the hazardous gas alarm is successful.

5. The remote calibration method for hazardous gas alarm according to claim 3 or 4, characterized in that: The method further comprises: Based on the current wind direction, determining whether the coverage area of ​​the dangerous gas alarm concentration detection is in the downstream area of ​​the generation source; If yes, determining a first diffusion time length of the dangerous gas from the generation source to the coverage area; Compare the first diffusion time with a preset first time threshold, and if the first diffusion time is less than the first time threshold, determine whether there is a first personnel activity area in the coverage area; If yes, determining a second fitting rate threshold according to the first diffusion time, the smaller the first diffusion time, the larger the second fitting rate threshold; If not, a second fitting rate threshold is determined according to the personnel activity area in the downstream area of ​​the coverage area in the wind direction.

6. The method for remote calibration of hazardous gas alarm according to claim 5, characterized in that: The determining, according to the personnel activity area in the downstream area of ​​the coverage area in the wind direction, a second fitting rate threshold value specifically includes: Selecting a second personnel activity area closest to the coverage area from the personnel activity areas in the downstream area of ​​the coverage area in the wind direction; Determining a second diffusion time of the hazardous gas from the coverage area to the second personnel activity area; If the second diffusion time is less than a preset second time threshold, a second fitting rate threshold is determined according to the second diffusion time, and the smaller the second diffusion time is, the larger the second fitting rate threshold is.

7. The method for remote calibration of hazardous gas alarm according to claim 6, characterized in that: The method further comprises: Determining the maximum warning range of the hazardous gas alarm, and judging whether the second personnel activity area is within the maximum warning range; If the second personnel activity area is not within the maximum warning range, determining the second personnel activity area as a dangerous gas alarm blind area; An inspection reminder corresponding to the hazardous gas alarm blind area is sent to the terminal of the inspection personnel, and the inspection reminder is used to remind the inspection personnel to detect the hazardous gas concentration in the hazardous gas alarm blind area.

8. A remote calibration device for a hazardous gas alarm, characterized in that: include: A signal acquisition module (11), used for acquiring a target electrical signal corresponding to the dangerous gas concentration sent by the dangerous gas alarm to be calibrated; A concentration determination module (12) is used to determine a first dangerous gas concentration at a target location where the dangerous gas alarm is located according to the target electrical signal; a difference calculation module (13), used for obtaining, through a camera, the second dangerous gas concentration actually displayed by the dangerous gas alarm, and calculating a first absolute value of a difference between the first dangerous gas concentration and the second dangerous gas concentration; A concentration re-acquisition module (14), configured to re-acquire at least one set of third dangerous gas concentrations actually displayed by the dangerous gas alarm if the absolute value of the first difference is not less than a difference threshold; A remote calibration module (15) is used to remotely calibrate the indication displayed by the hazardous gas alarm according to the concentration of each third hazardous gas.

9. A computer-readable storage medium having a computer program stored therein, characterized in that: When the computer program is loaded and executed by a processor, the method according to any one of claims 1 to 7 is adopted.

10. An electronic device comprising a memory, a processor, and a computer program stored in the memory and capable of running on the processor, characterized in that: When the processor loads and executes the computer program, the method according to any one of claims 1 to 7 is adopted.

Images