Underground gas detection method, gas detector, electronic equipment and storage medium

Abstract

The embodiment of the invention provides an underground gas detection method, a gas detector, electronic equipment and a storage medium, and belongs to the field of gas detection. The method comprises the following steps: collecting underground gas data, and determining corresponding infrared spectrum data based on the underground gas data; performing Fourier transform on the infrared spectrum data to obtain a spectrum absorption peak; based on a pre-established gas infrared spectrum database and a spectrum absorption peak, the type and the concentration of underground gas are identified, vibration information of gas molecules with extremely low concentration can be captured by utilizing an infrared spectrum technology, so that accurate measurement of the underground gas concentration is realized, and the method aims at complex and variable environments and accurate measurement of the underground gas concentration. An underground environment with a plurality of gases mixed exists, the characteristic absorption peaks of the plurality of gases can be detected at the same time by utilizing an infrared spectrum technology, effective identification and separation of the mixed gases are realized, and further comprehensive and accurate monitoring of the underground gases is realized, so that a safe operation environment is provided.

Description

Technical Field

[0001] The present invention relates to the technical field of gas detection, and in particular to an underground gas detection method, a gas detector, an electronic device and a storage medium. Background Art

[0002] In confined space operations, especially in the extreme and complex environment of underground operations, strictly implementing the safety process of "ventilation first, detection second, and operation last" is an indispensable part of preventing accidents and ensuring personnel safety. The regulations require that underground operations be ventilated for a long time and gas detection be performed every half an hour. However, with the increase in operating depth and the expansion of the operating area, the limitations of existing gas detection technology are becoming increasingly apparent, posing a potential threat to operational safety.

[0003] Existing gas detection methods mostly rely on traditional sensor technology. However, in low-concentration gas environments, especially when multiple gases are mixed, it is often difficult for sensors to accurately distinguish and precisely measure the specific concentration of each gas. Their insufficient sensitivity and limited detection range make it difficult to meet real-time, accurate, and comprehensive monitoring needs, which may lead to false alarms or missed alarms, posing a hidden danger to operational safety. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a downhole gas detection method, a gas detector, an electronic device and a storage medium, which are used to completely or at least partially solve the technical problems existing in the above-mentioned prior art.

[0005] In order to achieve the above object, an embodiment of the present invention provides a method for detecting underground gas, comprising:

[0006] Collecting downhole gas data, and determining corresponding infrared spectrum data based on the downhole gas data;

[0007] Performing Fourier transform on the infrared spectrum data to obtain spectrum absorption peaks;

[0008] Based on the pre-established gas infrared spectrum database and spectral absorption peaks, the type and concentration of underground gas can be identified.

[0009] Optionally, collecting downhole gas data and determining corresponding infrared spectrum data based on the downhole gas data includes:

[0010] A gas detector is arranged in the area to be tested, and the Fourier infrared spectrometer set in the gas detector is controlled to emit infrared light and receive infrared spectrum data after interaction with the gas to be tested.

[0011] Optionally, performing Fourier transform on the infrared spectrum data to obtain spectrum absorption peaks includes:

[0012] Inputting the infrared spectrum data into a Fourier transform program, performing transformation calculations, and outputting an initial infrared spectrum graph;

[0013] In the infrared spectrum, the impurity peaks in the initial infrared spectrum are filtered using an infrared spectrum database to obtain a target infrared spectrum, wherein the infrared spectrum database contains infrared absorption characteristic peak wavelengths of chemical bonds or functional groups of various gases and background light.

[0014] Optionally, the infrared spectrum data is subjected to Fourier transform according to the following formula:

[0015]

[0016] Where X[k] represents discrete Fourier transform, n represents sample index, and k represents frequency index. A factor that represents the frequency resolution, where i represents the imaginary unit.

[0017] Optionally, based on a pre-established gas infrared spectrum database and spectral absorption peaks, identify the type and concentration of underground gas, including:

[0018] The spectral absorption peak is compared with the infrared absorption characteristic peak of the chemical bond or functional group of each gas in the pre-established gas infrared spectrum database to determine the chemical bond or functional group corresponding to the characteristic absorption peak generated at different wavelengths in the infrared spectrum;

[0019] Determine the gas molecular formula according to the chemical bonds or functional groups corresponding to the characteristic absorption peaks generated at different wavelengths in the infrared spectrum, and determine the type of gas based on the gas molecular formula;

[0020] The concentration of the gas is determined using the Lambert-Beer law.

[0021] Optionally, determine the concentration of the gas using the Lambert-Beer law, including:

[0022] The absorbance calculation formula is used to calculate the absorbance corresponding to the characteristic absorption peak;

[0023] Substitute the obtained absorbance into the Lambert-Beer law formula to obtain the concentration of the gas corresponding to the characteristic absorption peak;

[0024] Wherein, the absorbance calculation formula is as follows: In the formula, A represents absorbance, I0 represents the incident light intensity, and I represents the intensity at the absorption peak;

[0025] The formula of Lambert-Beer's law is as follows: A=Kbc, where A represents absorbance, K represents the molar absorption coefficient of the gas, b represents the optical path length, and c represents the concentration of the gas.

[0026] Optionally, the downhole gas detection method further includes:

[0027] Determine whether the concentration of various underground gases exceeds the preset concentration threshold. If exceeded, an alarm message is issued.

[0028] On the other hand, the present invention also provides a gas detector applied to the underground gas detection method, including: an air inlet nozzle, a filter connected to the air inlet nozzle, a Fourier infrared spectrometer; a microprocessor, a display screen connected to the microprocessor, an alarm, and a communication module; a control host, and a mobile terminal connected to the control host, wherein the Fourier infrared spectrometer is used to perform infrared spectral data analysis on the gas collected by the air inlet nozzle, the communication module is used for real-time transmission of data, and the microprocessor is used for data processing, display and alarm.

[0029] On the other hand, the present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above-mentioned downhole gas detection method when executing the program.

[0030] On the other hand, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, wherein the computer program implements the steps of the above-mentioned downhole gas detection method when executed by a processor.

[0031] Through the above technical solution, infrared spectroscopy technology can be used to capture the vibration information of gas molecules at extremely low concentrations, thereby realizing accurate measurement of underground gas concentration. Moreover, for underground environments with complex and changeable environments and the presence of multiple gases mixed, infrared spectroscopy technology can be used to simultaneously detect the characteristic absorption peaks of multiple gases, thereby realizing effective identification and separation of mixed gases, and further realizing comprehensive and accurate monitoring of underground gases to provide a safe working environment.

[0032] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings:

[0034] Figure 1 is an implementation flow chart of a downhole gas detection method provided by an embodiment of the present invention;

[0035] Figure 2 It is a structural schematic diagram of a gas detector applied to a downhole gas detection method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0036] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0037] See also Figure 1 As shown, it is a flowchart of an implementation method of a downhole gas detection method provided by an embodiment of the present invention, including the following execution steps:

[0038] Step 100: Collect downhole gas data, and determine corresponding infrared spectrum data based on the downhole gas data.

[0039] Specifically, when executing step 100, a gas detector may be deployed in the area to be tested, and a Fourier infrared spectrometer provided in the gas detector may be controlled to emit infrared light and receive infrared spectrum data after interaction with the gas to be tested.

[0040] Step 101: Perform Fourier transform on the infrared spectrum data to obtain spectrum absorption peaks.

[0041] Specifically, when executing step 101, the following steps may be specifically performed:

[0042] S1010: Input the infrared spectrum data into a Fourier transform program, perform transformation calculations, and output an initial infrared spectrum graph.

[0043] Specifically, the infrared spectrum data may be subjected to Fourier transform according to the following formula:

[0044]

[0045] Where X[k] represents discrete Fourier transform, n represents sample index, and k represents frequency index. A factor that represents the frequency resolution, where i represents the imaginary unit.

[0046] S1011: In the infrared spectrum, the impurity peaks in the initial infrared spectrum are filtered out using an infrared spectrum database to obtain a target infrared spectrum, wherein the infrared spectrum database contains infrared absorption characteristic peak wavelengths of chemical bonds or functional groups of various gases and background light.

[0047] Step 102: Identify the type and concentration of underground gas based on a pre-established gas infrared spectrum database and spectral absorption peaks.

[0048] Specifically, when executing step 102, the following steps may be specifically performed:

[0049] S1020: Compare the spectral absorption peak with the infrared absorption characteristic peak of the chemical bond or functional group of each gas in a pre-established gas infrared spectrum database to determine the chemical bond or functional group corresponding to the characteristic absorption peak generated at different wavelengths in the infrared spectrum.

[0050] S1021: Determine the gas molecular formula according to the chemical bonds or functional groups corresponding to the characteristic absorption peaks generated at different wavelengths in the infrared spectrum, and determine the type of the gas based on the gas molecular formula.

[0051] S1022: Determine the concentration of a gas using the Lambert-Beer law.

[0052] Specifically, the absorbance calculation formula is used to calculate the absorbance corresponding to the characteristic absorption peak; the obtained absorbance is substituted into the Lambert-Beer law formula to obtain the concentration of the gas corresponding to the characteristic absorption peak; wherein, the absorbance calculation formula is as follows: In the formula, A represents absorbance, I0 represents the incident light intensity, and I represents the intensity at the absorption peak; the Lambert-Beer law formula is as follows: A=Kbc, in the formula, A represents absorbance, K represents the molar absorption coefficient of the gas, b represents the optical path length, and c represents the concentration of the gas.

[0053] In some embodiments, the implementation process of the downhole gas detection method further includes determining whether the concentration of each type of downhole gas exceeds a preset concentration threshold, and if so, issuing an alarm message.

[0054] For example, the types of detected gases include oxygen, toxic gas hydrogen sulfide, carbon monoxide, and combustible gas, among which the normal value of oxygen concentration is 19.5%-23.5%, the concentration of toxic gas hydrogen sulfide must be lower than 7ppm, the concentration of carbon monoxide must be lower than 25ppm, and the combustible gas must be lower than 10%LEL. It should be understood that the preset concentration threshold can be set according to the actual application scenario and is not limited here.

[0055] Through the above technical solution, infrared spectroscopy technology can be used to capture the vibration information of gas molecules at extremely low concentrations, thereby realizing accurate measurement of underground gas concentration. Moreover, for underground environments with complex and changeable environments and the presence of multiple gases mixed, infrared spectroscopy technology can be used to simultaneously detect the characteristic absorption peaks of multiple gases, thereby realizing effective identification and separation of mixed gases, and further realizing comprehensive and accurate monitoring of underground gases to provide a safe working environment.

[0056] See also Figure 2As shown, it is a structural schematic diagram of a gas detector applied to a downhole gas detection method provided by an embodiment of the present invention, comprising: an air inlet nozzle, a filter connected to the air inlet nozzle, and a Fourier infrared spectrometer; a microprocessor, a display screen connected to the microprocessor, an alarm, and a communication module; a control host, and a mobile terminal connected to the control host, wherein the Fourier infrared spectrometer is used to perform infrared spectral data analysis on the gas collected by the air inlet nozzle, the communication module is used for real-time transmission of data, and the microprocessor is used for data processing, display and alarm.

[0057] See also Figure 2 As shown, the alarm includes a vibration alarm and a buzzer alarm (which can be directly voice broadcast), the mobile terminal includes an app and a small program, and the microprocessor is also provided with a power supply, a USB communication port, and a storage module.

[0058] The gas content in a confined space is detected by a gas detector. The gas detector has the function of wireless signal transmission. In order to ensure the speed and accuracy of transmission, 5G wireless communication can be used. The low latency function of 5G transmission can be used to ensure the real-time sharing of gas content information in a confined space and protect the personal safety of workers in the well.

[0059] In some embodiments, confined space operations must strictly implement the requirement of ventilation before detection. First, ventilation is performed for a period of time, the gas detector is first turned on and preheated, and then the air inlet nozzle is inserted into the catheter, and the catheter is inserted into the well or other confined space operation area that needs to be detected. After the gas detector is preheated, detection begins, such as measuring the gas content of oxygen, toxic gas hydrogen sulfide, carbon monoxide, and combustible gas. When the gas content does not exceed the standard, it operates normally. When the gas content exceeds the standard, the gas lift detector begins to buzz and alarm.

[0060] In some embodiments, various types of gas sensors may be provided in the gas detector, such as electrochemical sensors, which work by reacting with the detected target gas and generating an electrical signal proportional to the gas concentration.

[0061] In some embodiments, the gas detector can be carried by the workers in the well to the confined space areas such as underground. The workers in the well can directly observe the gas content in the well through the gas detector display screen, and the monitoring personnel outside the well can directly observe the gas content in the well on the mobile terminal through the matching app and mini-program. When there are multiple confined space operations at the same work site, the gas content in each confined space can be synchronized to the terminal app and mini-program. When the confined space monitoring personnel find that the gas content in the area not under their supervision is unqualified, they can simultaneously tell the confined space workers under their supervision to evacuate simultaneously, thereby forming a linkage mechanism for convenient safety management and control.

[0062] On the other hand, the present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the downhole gas detection method described in any one of the above embodiments when executing the program.

[0063] On the other hand, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of the downhole gas detection method described in any of the above embodiments are implemented.

[0064] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0065] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0066] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0067] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1The steps for the functions specified in one or more boxes.

[0068] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0069] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0070] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0071] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0072] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A method for detecting underground gas, characterized in that: include: Collecting downhole gas data, and determining corresponding infrared spectrum data based on the downhole gas data; Performing Fourier transform on the infrared spectrum data to obtain spectrum absorption peaks; Based on the pre-established gas infrared spectrum database and spectral absorption peaks, the type and concentration of underground gas can be identified.

2. The underground gas detection method according to claim 1, characterized in that: Collecting downhole gas data and determining corresponding infrared spectrum data based on the downhole gas data, including: A gas detector is arranged in the area to be tested, and the Fourier infrared spectrometer set in the gas detector is controlled to emit infrared light and receive infrared spectrum data after interaction with the gas to be tested.

3. The underground gas detection method according to claim 1, characterized in that: Performing Fourier transform on the infrared spectrum data to obtain spectrum absorption peaks includes: Inputting the infrared spectrum data into a Fourier transform program, performing transformation calculations, and outputting an initial infrared spectrum graph; In the infrared spectrum, the impurity peaks in the initial infrared spectrum are filtered using an infrared spectrum database to obtain a target infrared spectrum, wherein the infrared spectrum database contains infrared absorption characteristic peak wavelengths of chemical bonds or functional groups of various gases and background light.

4. The underground gas detection method according to claim 3, characterized in that: The infrared spectrum data is Fourier transformed according to the following formula: Where X[k] represents discrete Fourier transform, n represents sample index, and k represents frequency index. A factor that represents the frequency resolution, where i represents the imaginary unit.

5. The underground gas detection method according to claim 1, characterized in that: Based on the pre-established gas infrared spectrum database and spectral absorption peaks, the type and concentration of underground gas can be identified, including: The spectral absorption peak is compared with the infrared absorption characteristic peak of the chemical bond or functional group of each gas in the pre-established gas infrared spectrum database to determine the chemical bond or functional group corresponding to the characteristic absorption peak generated at different wavelengths in the infrared spectrum; Determine the gas molecular formula according to the chemical bonds or functional groups corresponding to the characteristic absorption peaks generated at different wavelengths in the infrared spectrum, and determine the type of gas based on the gas molecular formula; The concentration of the gas is determined using the Lambert-Beer law.

6. The underground gas detection method according to claim 5, characterized in that: Use the Lambert-Beer law to determine the concentration of gases, including: The absorbance calculation formula is used to calculate the absorbance corresponding to the characteristic absorption peak; Substitute the obtained absorbance into the Lambert-Beer law formula to obtain the concentration of the gas corresponding to the characteristic absorption peak; Wherein, the absorbance calculation formula is as follows: In the formula, A represents absorbance, I0 represents the incident light intensity, and I represents the intensity at the absorption peak; The formula of Lambert-Beer's law is as follows: A=Kbc, where A represents absorbance, K represents the molar absorption coefficient of the gas, b represents the optical path length, and c represents the concentration of the gas.

7. The underground gas detection method according to any one of claims 1 to 6, characterized in that: The downhole gas detection method further comprises: Determine whether the concentration of various underground gases exceeds the preset concentration threshold. If so, an alarm message will be issued.

8. A gas detector used in the underground gas detection method according to any one of claims 1 to 7, characterized in that: include: An air inlet nozzle, a filter connected to the air inlet nozzle, and a Fourier infrared spectrometer; A microprocessor, a display screen connected to the microprocessor, an alarm, and a communication module; a control host, and a mobile terminal connected to the control host, wherein the Fourier infrared spectrometer is used to analyze the infrared spectrum data of the gas collected by the air inlet nozzle, the communication module is used for real-time transmission of data, and the microprocessor is used for data processing, display and alarm.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the steps of the downhole gas detection method as described in any one of claims 1-7 are implemented.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the downhole gas detection method according to any one of claims 1 to 7 are implemented.

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