Gas detection device, gas detection method and electronic equipment

Abstract

The invention relates to the technical field of electrical equipment gas detection, and particularly provides a gas detection device, a gas detection method and electronic equipment.The gas detection device comprises a light source, a transduction piece and a photoelectric detection piece, and the light source is used for emitting a first optical frequency comb and a second optical frequency comb; the first optical frequency comb comprises a plurality of first spectral lines with equal frequency intervals, the second optical frequency comb comprises a plurality of second spectral lines with equal frequency intervals, and the frequency intervals of the first spectral lines and the second spectral lines have a repetition frequency difference; the transduction piece is connected with the light source; the transduction piece is used for accommodating to-be-detected gas, and the to-be-detected gas interacts with the first optical frequency comb and the second optical frequency comb respectively to obtain interference optical signals; the photoelectric detection piece is connected with the transduction piece; the photoelectric detector is used for receiving and converting the interference light signal to obtain a target electric signal, and the target electric signal is related to the concentration and type of the to-be-detected gas. According to the invention, high-precision synchronous detection of multi-component gas can be realized, and the spectral resolution is high.

Description

Technical Field

[0001] This invention relates to the field of gas detection technology for power equipment, and in particular to gas detection devices, gas detection methods and electronic equipment. Background Technology

[0002] Optical gas sensing technology, due to its advantages such as fast response and resistance to electromagnetic interference, is widely used in fields such as power equipment condition assessment, environmental monitoring, and industrial safety. Conventional optical gas sensing technology measures the absorption intensity of gas molecules at a specific wavelength by interacting with the absorption lines of gas molecules using laser light of a specific wavelength, thereby achieving qualitative and quantitative detection of gas concentration. However, conventional optical gas sensing technology struggles to simultaneously handle multi-component gas detection and high-sensitivity measurement, and its spectral resolution is limited. Summary of the Invention

[0003] The gas detection device, gas detection method, and electronic equipment provided in the embodiments of the present invention at least solve the problems of difficulty in simultaneously detecting multi-component gases and high-sensitivity measurement, and low spectral resolution. They can achieve high-precision synchronous detection of multi-component gases with high spectral resolution.

[0004] In a first aspect, the present invention provides a gas detection device, comprising a light source for emitting a first optical frequency comb and a second optical frequency comb, the first optical frequency comb including multiple first spectral lines with equal frequency intervals, the second optical frequency comb including multiple second spectral lines with equal frequency intervals, the frequency intervals of the first spectral lines and the second spectral lines having a repetition frequency difference; a transducer connected to the light source; the transducer for containing a gas to be tested, the gas to be tested interacting with the first optical frequency comb and the second optical frequency comb respectively to obtain an interference light signal; and a photodetector connected to the transducer; the photodetector for receiving and converting the interference light signal to obtain a target electrical signal, the target electrical signal being related to the concentration and type of the gas to be tested.

[0005] In one embodiment of the present invention, the device further includes: a first processing unit electrically connected to the photodetector; the first processing unit is used to perform Fourier transform processing on the target electrical signal to obtain the radio frequency spectrum of the gas to be tested and the amplitude of each frequency component in the radio frequency spectrum; a second processing unit electrically connected to the first processing unit; the second processing unit is used to determine the type of the gas to be tested based on the radio frequency spectrum, and to determine the concentration of the gas to be tested based on the amplitude corresponding to each frequency component in the radio frequency spectrum.

[0006] In one embodiment of the present invention, the transducer is configured as any one of a gas absorption cell, a Mach-Zehnder interferometer, a ring resonator, and a Fizeau interferometer.

[0007] In one embodiment of the present invention, the transducer includes a first single-mode fiber, an anti-resonant hollow fiber, and a second single-mode fiber; the first single-mode fiber is connected to the light source and the anti-resonant hollow fiber respectively, the anti-resonant hollow fiber is used to contain the gas to be tested, and the second single-mode fiber is connected to the anti-resonant hollow fiber and the photoelectric detector respectively.

[0008] Secondly, the present invention also provides a gas detection method, comprising the steps of: passing a gas to be tested into a transducer; wherein the transducer is connected to a light source and a photodetector; controlling the light source to emit a first optical frequency comb and a second optical frequency comb, wherein the gas to be tested interacts with the first optical frequency comb and the second optical frequency comb respectively to obtain an interference light signal; wherein the first optical frequency comb includes multiple first spectral lines with equal frequency intervals, the second optical frequency comb includes multiple second spectral lines with equal frequency intervals, and the frequency intervals of the first spectral lines and the second spectral lines have a repetition frequency difference; receiving and converting the interference light signal through the photodetector to obtain a target electrical signal, wherein the target electrical signal is related to the concentration and type of the gas to be tested.

[0009] In one embodiment of the present invention, after receiving and converting the interference light signal through the photoelectric detector to obtain the target electrical signal, the method further includes the steps of: performing Fourier transform processing on the target electrical signal to obtain the radio frequency spectrum of the gas to be tested and the amplitude of each frequency component in the radio frequency spectrum; determining the type of the gas to be tested based on the radio frequency spectrum; and determining the concentration of the gas to be tested based on the amplitude corresponding to each frequency component in the radio frequency spectrum.

[0010] In one embodiment of the present invention, determining the type of the gas to be tested based on the radio frequency spectrum includes the steps of: determining an electrical frequency based on the radio frequency spectrum; calculating a target frequency to be absorbed based on the electrical frequency; and determining the type of the gas to be tested based on the target frequency.

[0011] In one embodiment of the present invention, the target frequency to be absorbed is calculated based on the electrical frequency, and is expressed as follows: , , , , In the formula, The electrical frequency; The first optical frequency comb The optical frequency of the first spectral line; The second optical frequency comb The optical frequency of the second spectral line; The difference in repetition frequency; The frequency interval of the first spectral line; The frequency interval of the second spectral line; The initial frequency difference; The initial frequency of the first optical frequency comb; The initial frequency of the second optical frequency comb is given.

[0012] In one embodiment of the present invention, the concentration of the gas to be measured is determined according to the amplitude corresponding to each frequency component in the radio frequency spectrum, including the steps of: searching in a pre-constructed correspondence table according to the target amplitude to determine the concentration of the gas to be measured; wherein the correspondence table is constructed by calibration of gas concentration and Fourier transform amplitude.

[0013] Thirdly, the present invention also provides an electronic device, including a processor and a memory storing a program, the program including instructions that, when executed by the processor, cause the processor to perform the gas detection method described in any of the preceding claims.

[0014] Compared with the prior art, the above-described technical solution of the present invention has the following advantages:

[0015] The gas detection device described in this invention comprises a statically structured light source, transducer, and photoelectric detector that work together to allow the gas to be detected within the transducer to interact with a first optical frequency comb and a second optical frequency comb, generating interference light signals. These signals are then converted by the photoelectric detector into target electrical signals related to the concentration and type of the gas to be detected. Frequency analysis of the target electrical signal reveals the type of gas to be detected, while measuring the intensity variation of specific frequency components yields the concentration. This results in high overall stability and measurement efficiency, effectively overcoming the contradiction between bandwidth and sensitivity, as well as the problem of cross-interference among multiple gas components, in existing technologies. It balances a wide spectral range with ultra-narrow bandwidth, enabling simultaneous detection of multiple gases with high sensitivity and high spectral resolution. It is particularly suitable for monitoring power equipment and detecting gases in complex industrial environments. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort. In the drawings:

[0017] Figure 1 This is a schematic diagram of the gas detection device in a preferred embodiment of the present invention.

[0018] Figure 2 This is a partial structural schematic diagram of the gas detection device in a preferred embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram of an optical frequency comb in a preferred embodiment of the present invention.

[0020] Figure 4 This is one of the schematic diagrams of gas absorption of the optical frequency comb in a preferred embodiment of the present invention.

[0021] Figure 5 This is the second schematic diagram of gas absorption of the optical frequency comb in a preferred embodiment of the present invention.

[0022] Figure 6 This is the third schematic diagram of gas absorption of the optical frequency comb in a preferred embodiment of the present invention.

[0023] Figure 7 This is one of the schematic diagrams illustrating the gas sensing mechanism of the gas detection device in a preferred embodiment of the present invention.

[0024] Figure 8 This is the second schematic diagram of the gas detection device analyzing the gas sensing mechanism in a preferred embodiment of the present invention.

[0025] Figure 9 This is the third schematic diagram of the gas detection device analyzing the gas sensing mechanism in a preferred embodiment of the present invention.

[0026] Figure 10 This is the fourth schematic diagram of the gas detection device analyzing the gas sensing mechanism in a preferred embodiment of the present invention.

[0027] Figure 11 This is the fifth schematic diagram of the gas detection device analyzing the gas sensing mechanism in a preferred embodiment of the present invention.

[0028] Figure 12 This is a schematic flowchart of the gas detection method in a preferred embodiment of the present invention.

[0029] Figure 13 This is a schematic diagram of the structure of an electronic device in a preferred embodiment of the present invention.

[0030] The above figures include the following reference numerals: 1. First optical frequency comb; 2. Second optical frequency comb; 3. Light source; 4. First single-mode fiber; 5. Anti-resonant hollow fiber; 6. Second single-mode fiber; 7. Transducer; 8. Photodetector; 91. First processing unit; 92. Second processing unit; 101. Computing unit; 102. ROM; 103. RAM; 104. Bus; 105. I / O interface; 106. Input unit; 107. Output unit; 108. Storage unit; 109. Communication unit. Detailed Implementation

[0031] Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While some embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the invention. It should be understood that the accompanying drawings and embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the invention.

[0032] It should be noted that optical gas sensing technology, due to its advantages such as fast response and resistance to electromagnetic interference, is widely used in fields such as power equipment condition assessment, environmental monitoring, and industrial safety.

[0033] In existing technologies, optical gas sensing technologies mainly include tunable semiconductor laser absorption spectroscopy (TDLAS), photoacoustic spectroscopy, and photothermal spectroscopy. These technologies measure the absorption intensity of gas molecules at specific wavelengths by interacting with the absorption lines of gas molecules using lasers of specific wavelengths, thereby enabling qualitative and quantitative detection of gas concentration.

[0034] However, these optical gas sensing technologies have significant limitations in multi-component gas detection and high-sensitivity measurement.

[0035] Specifically, there is a trade-off between the bandwidth and sensitivity of existing optical gas sensing technologies. In the simultaneous detection of multi-component gases, the sensing light source needs to cover the absorption spectra of multiple gases; therefore, the bandwidth of the light source needs to be sufficiently wide to cover the absorption range of multiple gases.

[0036] Broadband light sources can detect more types of gases, but due to their wide bandwidth and low spectral resolution, they can cause cross-interference of absorption lines from different gases.

[0037] In terms of high-sensitivity gas detection, narrowband light sources can provide high resolution and sensitivity, enabling accurate detection of gas concentration. However, due to their narrow spectral bandwidth, they can only measure a few specific gases and cannot meet the requirements for simultaneous detection of multiple gases.

[0038] Furthermore, these optical gas sensing technologies have limited spectral resolution, making it difficult to effectively distinguish gas molecules with similar frequencies.

[0039] In existing technologies, optical gas sensors typically employ laser spectral analysis-based methods. However, due to limitations in equipment precision and optical systems, traditional spectrometers have resolutions limited to approximately tens of megahertz. This results in insufficient accuracy for multi-gas analysis and component identification, especially when gas molecule absorption lines overlap, severely interfering with the accuracy and sensitivity of the measurement results.

[0040] To solve the above problems, refer to Figure 1As shown, an embodiment of the present invention provides a gas detection device, including a light source 3, a transducer 7, and a photodetector.

[0041] The light source 3 is used to emit the first optical frequency comb 1 and the second optical frequency comb 2. It has the dual characteristics of "wide" and "narrow", and can convert different spectral lines into light intensity modulation signals of specific frequencies. It can achieve synchronous high-sensitivity detection of multiple mixed gases within the entire bandwidth of the light source 3.

[0042] An optical frequency comb is essentially a set of optical signals with uniformly arranged frequencies, as referenced. Figure 3 As shown, the optical frequency comb includes multiple laser spectral lines, each with an equal frequency interval.

[0043] In the diagram, au represents arbitrary units. The initial frequency of the optical frequency comb. This indicates the frequency interval of the optical frequency comb lines. The frequency is the electrical frequency. Each spectral line of the optical frequency comb corresponds to an ultra-narrow bandwidth monochromatic laser beam, enabling highly sensitive gas concentration detection.

[0044] Reference Figure 4 , Figure 5 and Figure 6 As shown, due to the large frequency span between the lowest and highest frequency spectral lines in the optical frequency comb, the entire light source 3 has a wide spectral distribution range, which can meet the coverage requirements of absorption spectral lines of various gases. The whole composed of all absorption spectral lines forms a broad-spectrum absorption line (i.e., absorption spectral information) with a wide coverage range, which can reflect the absorption characteristics of different gas types, and realize the identification and recognition of different gas components.

[0045] Taking advantage of the large number of spectral lines, wide spectral distribution range, and extremely narrow bandwidth of each spectral line in an optical frequency comb, a dual optical frequency comb is formed by organically integrating two optical frequency combs with slightly different repetition frequencies.

[0046] Specifically, the first optical frequency comb 1 includes multiple first spectral lines with equal frequency spacing, and the second optical frequency comb 2 includes multiple second spectral lines with equal frequency spacing. The frequency spacing between the first and second spectral lines has a repetition frequency difference. Preferably, the repetition frequency difference The frequency can be set from 10Hz to 100Hz, and the bandwidths of the first and second spectral lines are set to the same order of magnitude, such as tens to hundreds of megahertz, to ensure the formation of a stable and distinguishable signal.

[0047] Due to the difference in repetition frequency The repetition periods of the first optical frequency comb 1 and the second optical frequency comb 2 in the time domain have a certain delay. , represented as:

[0048] .

[0049] Reference Figure 7 As shown, for the first optical frequency comb 1, the first... The optical frequency corresponding to the first spectral line Represented as:

[0050] .

[0051] In the formula, For the first optical frequency comb 1 The optical frequency corresponding to the first spectral line. The frequency interval of the first spectral line is denoted as . The initial frequency of the first optical frequency comb 1.

[0052] Reference Figure 8 As shown, for the second optical frequency comb 2, the first The optical frequency corresponding to each second spectral line Represented as:

[0053] .

[0054] In the formula, For the second optical frequency comb 2 The optical frequency corresponding to the second spectral line. This represents the frequency interval of the second spectral line. The initial frequency of the second optical frequency comb 2 is given.

[0055] Based on the heterodyne interference effect, the first optical frequency comb 1's... The first spectral line and the second optical frequency comb 2 The second spectral line will cause interference, which in turn will produce a mixing phenomenon.

[0056] After it enters the photodetector, the original optical frequencies are respectively and The high-frequency optical signal is converted into a low-frequency electrical signal, i.e., the target electrical signal, for further analysis. According to microwave photonics theory, the frequency of the target electrical signal... Represented as:

[0057] .

[0058] .

[0059] .

[0060] In the formula, The frequency is the electrical frequency. This represents the difference in repetition frequency. This is the initial frequency difference. Thus, by measuring the frequency of the target electrical signal... The frequency of the measured spectrum can then be retrieved.

[0061] The transducer 7 is connected to the light source 3 and is used to contain the gas to be tested. The gas to be tested can be a single gas or a multi-component mixture. The gas to be tested can be initially placed in the transducer 7, or it can be introduced into the transducer 7 when detection is required.

[0062] The transducer 7 can be configured as any one of a gas absorption cell, a Mach-Zehnder interferometer, a ring resonator, or a Fizeau interferometer. For example, when the transducer 7 is configured as a gas absorption cell, the gas to be measured directly absorbs light of a specific spectrum within the cell, and the changing light intensity can be used to measure the gas concentration; when the transducer 7 is configured as a Mach-Zehnder interferometer, the phase change caused by the gas to be measured is measured using the interference principle to reflect the gas concentration; when the transducer 7 is configured as a ring resonator, the light signal undergoes multiple reflections within the ring structure, interacting with the refractive index change caused by the absorption of the gas to be measured, thus generating a signal change.

[0063] Preferably, in this embodiment of the invention, the transducer 7 includes a Fizeau interferometer and two single-mode optical fibers. The Fizeau interferometer converts extremely weak refractive index changes into phase changes, which are then read out as intensity, effectively amplifying the absorbed signal.

[0064] Thus, the entire device has a completely static structure, requiring no moving mechanical parts, effectively improving overall stability and measurement speed. Compared to the mechanical scanning structure of traditional Fourier spectrometers in existing technologies, it is smaller in size and avoids the problem of prolonged scanning time, improving measurement efficiency and portability. The overall sampling time is only about tens to hundreds of microseconds, and even when extending the sampling time to improve optical frequency resolution, it can be controlled within the millisecond range.

[0065] After the gas to be tested interacts with the first optical frequency comb 1 and the second optical frequency comb 2 respectively, interference light signals are obtained.

[0066] Reference Figure 9 As shown, the first optical frequency comb 1's... The first spectral line and the second optical frequency comb 2 The second spectral line is absorbed by the gas molecules of the gas being tested. Under the influence of the thermo-optic effect, the refractive index of the gas will change with the light intensity, that is, the refractive index changes with the repetition frequency. It changes periodically.

[0067] Reference Figure 10 and Figure 11 As shown, It is time. The intensity of the interference light signal output by transducer 7 depends on the refractive index of the gas to be measured inside transducer 7; therefore, the intensity of the interference light signal is also related to the repetition frequency. It changes periodically.

[0068] The photodetector 8 is connected to the transducer 7. The photodetector 8 is used to receive and convert the interference light signal to obtain the target electrical signal, which is related to the concentration and type of the gas to be measured. Preferably, the photodetector 8 is configured as a photodetector to convert the interference light signal of several hundred terahertz into a low-frequency target electrical signal.

[0069] The response time of the photodetector 8 is much longer than the pulse duration of the optical frequency comb (usually on the order of femtoseconds), and the interference light signal happens to be in the radio frequency band. Therefore, the photodetector 8 constitutes a low-pass filter, which directly filters out the optical frequency signal and retains only the beat frequency signal in the radio frequency band, effectively improving the signal sensitivity.

[0070] After obtaining the target electrical signal related to the concentration and type of the gas to be measured, Fourier transform processing can be performed on it to convert the time-domain signal into radio frequency spectrum information. Through spectrum analysis, the electrical frequency of the target electrical signal can be determined. This allows for the extraction of amplitude information of specific frequency components, yielding the absorbed optical frequencies corresponding to the gas absorption lines of the gas being measured, and thus deriving the absorption spectrum information. In this way, gas composition and concentration information can be retrieved without the need for a spectrometer.

[0071] Specifically, when the gas to be tested includes a mixture of multiple gases, these gases simultaneously absorb multiple spectral lines. Since the frequency of the periodic intensity modulation signal generated by each spectral line is different, different gas absorption lines can be effectively distinguished by performing spectral analysis on the target electrical signal, thus enabling the identification of different gas components.

[0072] Since each spectral line is converted into a light intensity modulation signal of a specific frequency, the amplitude information of a specific frequency component can be extracted from the target electrical signal to obtain specific gas concentration information with high sensitivity.

[0073] Furthermore, by reducing the repetition frequency difference between the first and second spectral lines... Increasing the frequency spacing of the optical frequency comb and reducing the bandwidth of a single spectral line can effectively improve spectral resolution to tens of kilohertz, far exceeding the resolution limit of tens of megahertz in existing technologies. This enables precise differentiation of gas molecules with very similar absorption peaks, significantly improving the identification accuracy of complex gas mixtures. For example, spectral resolution... It can be represented as:

[0074] .

[0075] In the formula, The bandwidth of a single first spectral line.

[0076] The gas detection device described in this embodiment of the invention comprises a statically structured light source 3, a transducer 7, and a photodetector 8 that work together to allow the gas to be detected within the transducer 7 to interact with the first optical frequency comb 1 and the second optical frequency comb 2, respectively, generating interference light signals. These signals are then converted by the photodetector 8 into target electrical signals related to the concentration and type of the gas to be detected. Frequency analysis of the target electrical signal reveals the type of gas to be detected, while measuring the intensity variation of specific frequency components yields the concentration of the gas to be detected. This results in high overall stability and measurement efficiency, effectively overcoming the contradiction between bandwidth and sensitivity, as well as the problem of cross-interference among multiple gas components, in existing technologies. It balances a wide spectral range with ultra-narrow bandwidth characteristics, enabling simultaneous detection of multiple gases with high sensitivity and high spectral resolution. It is particularly suitable for monitoring power equipment and detecting gases in complex industrial environments.

[0077] Reference Figure 2 As shown, in some embodiments, the gas detection device of the present invention further includes a first processing component 91 and a second processing component 92.

[0078] The first processing unit 91 is electrically connected to the photoelectric detector 8. The first processing unit 91 is used to perform Fourier transform processing on the target electrical signal to obtain the radio frequency spectrum of the gas to be measured, as well as the amplitude of each frequency component in the radio frequency spectrum. In this way, the time-domain signal is converted into radio frequency spectrum information, and the radio frequency spectrum resolution is extremely high, reaching the kilohertz level, breaking through the resolution limit of existing spectrometers.

[0079] The second processing unit 92 is electrically connected to the first processing unit 91. The second processing unit 92 is used to determine the type of gas to be measured based on the radio frequency spectrum, and to determine the concentration of the gas to be measured based on the amplitude corresponding to each frequency component in the radio frequency spectrum.

[0080] Thus, by combining heterodyne interferometry with Fourier spectral analysis, the spectral resolution of the device is significantly improved, enabling accurate differentiation of absorption lines of gas molecules with similar frequencies. Through time-domain spectral analysis, the amplitude information of specific frequency components can be extracted, solving the problem of inaccurate component identification caused by low spectral resolution in existing technologies. Furthermore, it effectively eliminates the cross-sensitivity of other gas components and the interference of environmental noise, thereby greatly improving the signal-to-noise ratio.

[0081] Reference Figure 1As shown, in some embodiments of the gas detection device of the present invention, the transducer 7 includes a first single-mode optical fiber 4, an anti-resonant hollow optical fiber 5, and a second single-mode optical fiber 6.

[0082] The anti-resonant hollow fiber 5 is used to contain the gas to be measured. The anti-resonant hollow fiber 5 provides a longer gas interaction length and low-loss transmission. Compared with the existing technology of "through-gas cell + direct beat frequency", the transducer 7 with this structure has advantages in quantitative sensitivity and signal-to-noise ratio.

[0083] Based on its anti-resonance properties, the anti-resonant hollow fiber 5 allows the optical signal to be reflected multiple times within the hollow core, amplifying the influence of the gas on the light while ensuring sufficient intensity after multiple reflections. Simultaneously, the hollow structure of the anti-resonant hollow fiber 5 can be directly filled with the gas to be measured, allowing the gas to interact with the corresponding optical signal and alter the optical refractive index.

[0084] The first single-mode fiber 4 connects to the light source 3 and the anti-resonant hollow fiber 5 respectively, so as to efficiently transmit the optical signal of the light source 3 into the anti-resonant hollow fiber 5 and avoid the divergence and interference of light when propagating in the air. The single-mode fiber only allows one optical mode to be transmitted to ensure that the optical signal entering the anti-resonant hollow fiber 5 is neat and concentrated, and avoids light leakage or coupling deviation.

[0085] The second single-mode fiber 6 is connected to the anti-resonant hollow fiber 5 and the photodetector 8 respectively, so as to stably transmit the interference light signal to the photodetector 8 and avoid the light being contaminated by the outside world during the transmission process.

[0086] During operation, the light source 3 outputs a first optical frequency comb 1 and a second optical frequency comb 2. The dual-comb light is sent through the first single-mode fiber 4 into the anti-resonant hollow fiber 5, where it interacts with the gas to be measured within the anti-resonant hollow fiber 5, achieving absorption modulation and heterodyne interference. The absorption characteristics of the gas cause each spectral line in the spectrum to undergo periodic changes within its frequency range, thereby causing changes in the output of the photodetector 8. The interference light signal is sent through the second single-mode fiber 6 into the photodetector 8, where it is converted into a target electrical signal. Time-domain analysis of the target electrical signal is performed to obtain gas absorption characteristic information, enabling highly sensitive measurement of multi-component gases and determining the types and concentrations of different gases.

[0087] On the other hand, refer to Figure 12 As shown, this embodiment of the invention also provides a gas detection method, applied to the gas detection device described in any of the above embodiments. The gas detection method includes the following steps:

[0088] The gas to be tested is introduced into the transducer 7. The transducer 7 is connected to the light source 3 and the photoelectric detector 8.

[0089] The control light source 3 emits a first optical frequency comb 1 and a second optical frequency comb 2. The gas to be tested interacts with the first optical frequency comb 1 and the second optical frequency comb 2 respectively to obtain interference light signals. The first optical frequency comb 1 includes multiple first spectral lines with equal frequency spacing, and the second optical frequency comb 2 includes multiple second spectral lines with equal frequency spacing. The frequency spacing between the first spectral lines and the second spectral lines has a repetition frequency difference.

[0090] The photoelectric detector 8 receives and converts the interference light signal to obtain the target electrical signal, which is related to the concentration and type of the gas to be measured.

[0091] It should be noted that the gas to be tested can be passed through first, or the light source 3 can be controlled to emit light first.

[0092] In some embodiments of the gas detection method of the present invention, after receiving and converting the interference light signal through the photoelectric detector 8 to obtain the target electrical signal, the method further includes the following steps:

[0093] First, the target electrical signal is subjected to Fourier transform processing to obtain the radio frequency spectrum of the gas to be tested, as well as the amplitude of each frequency component in the radio frequency spectrum.

[0094] Then, based on the radio frequency spectrum, the type of gas to be measured is determined.

[0095] On the other hand, the concentration of the gas to be measured is determined based on the amplitude corresponding to each frequency component in the radio frequency spectrum.

[0096] In some embodiments, the gas detection method of the present invention determines the type of gas to be detected based on the radio frequency spectrum, including the following steps:

[0097] First, determine the electrical frequency based on the radio frequency spectrum. .

[0098] Secondly, the target frequency to be absorbed is calculated based on the electrical frequency, and expressed as:

[0099] .

[0100] .

[0101] .

[0102] .

[0103] .

[0104] Finally, the type of gas to be measured is determined based on the target frequency.

[0105] In some embodiments, the gas detection method of the present invention determines the concentration of the gas to be detected based on the amplitude corresponding to each frequency component in the radio frequency spectrum, including the following steps:

[0106] Based on the target amplitude, the concentration of the gas to be measured is determined by looking up a pre-constructed correspondence table. This correspondence table is constructed using gas concentration and Fourier transform amplitude calibration.

[0107] In some other embodiments, absorption information can also be obtained by calculating the difference spectrum by measuring the electrical signal converted from the unabsorbed interference light signal and measuring the target electrical signal.

[0108] This invention also provides a non-transitory machine-readable medium storing a computer program. When executed by a computer's processor, the computer program causes the computer to perform the gas detection method described in any of the above embodiments.

[0109] This invention also provides a computer program product, including a computer program. When executed by a computer's processor, the computer program causes the computer to perform the gas detection method described in any of the above embodiments.

[0110] This invention also provides an electronic device, including at least one processor and a memory communicatively connected to the at least one processor. The memory stores a computer program executable by the at least one processor, which, when executed by the at least one processor, causes the electronic device to perform the gas detection method described in any of the above embodiments.

[0111] Reference Figure 13 The diagram illustrates a structural block diagram of an electronic device that can serve as an embodiment of the present invention, representing an example of a hardware device applicable to various aspects of the invention. The term "electronic device" is intended to represent various forms of digital electronic computer devices, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0112] Reference Figure 13As shown, the electronic device includes a computing unit 101, which can perform various appropriate actions and processes based on a computer program stored in a read-only memory (ROM) 102 or a computer program loaded from a storage unit 108 into a random access memory (RAM) 103. The RAM 103 may also store various programs and data required for the operation of the electronic device. The computing unit 101, ROM 102, and RAM 103 are interconnected via a bus 104. An input / output (I / O) interface 105 is also connected to the bus 104.

[0113] Multiple components in the electronic device are connected to I / O interface 105, including: input unit 106, output unit 107, storage unit 108, and communication unit 109. Input unit 106 can be any type of device capable of inputting information into the electronic device. Input unit 106 can receive input digital or character information and generate key signal inputs related to user settings and / or function control of the electronic device. Output unit 107 can be any type of device capable of presenting information and may include, but is not limited to, a display, speaker, video / audio output terminal, vibrator, and / or printer. Storage unit 108 may include, but is not limited to, disks and optical discs. Communication unit 109 allows the electronic device to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks, and may include, but is not limited to, modems, network cards, infrared communication devices, and / or wireless communication transceivers, such as Bluetooth devices, WiFi devices, WiMax devices, cellular communication devices, and / or the like.

[0114] The computing unit 101 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of the computing unit 101 include, but are not limited to, CPUs, graphics processing units (GPUs), various special-purpose artificial intelligence (AI) computing units, various computing units running machine learning model algorithms, digital signal processors (DSPs), and any suitable processor, controller, microcontroller, etc. The computing unit 101 performs the various methods and processes described above. For example, in some embodiments, the method embodiments of the present invention may be implemented as a computer program tangibly contained in a machine-readable medium, such as storage unit 108. In some embodiments, part or all of the computer program may be loaded and / or installed on an electronic device via ROM 102 and / or communication unit 109. In some embodiments, the computing unit 101 may be configured to perform the methods described above by any other suitable means (e.g., by means of firmware).

[0115] Computer programs for implementing the methods of embodiments of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor or controller of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus, such that when executed by the processor or controller, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be implemented. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0116] In the context of embodiments of the present invention, a machine-readable medium can be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, apparatus, or device. A machine-readable medium can be a machine-readable signal medium or a machine-readable storage medium. A machine-readable signal medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, or infrared systems, apparatus, or devices, or any suitable combination of the foregoing. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0117] It should be noted that the term "comprising" and its variations used in the embodiments of the present invention are open-ended, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". The modifications of "one" and "a plurality" mentioned in the embodiments of the present invention are illustrative and not restrictive, and those skilled in the art should understand that unless explicitly indicated otherwise in the context, they should be understood as "one or more".

[0118] The steps described in the method embodiments provided by the present invention can be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of protection of the present invention is not limited in this respect.

[0119] The term "embodiment" in this specification refers to a specific feature, structure, or characteristic described in connection with an embodiment that may be included in at least one embodiment of the invention. The appearance of this phrase in various places in the specification does not necessarily imply the same embodiment, nor does it imply independence or alternativeity from other embodiments. The various embodiments in this specification are described in a related manner, with reference to each other for similar or identical parts. In particular, for apparatus, device, and system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, and relevant details are referred to in the description of the method embodiments.

[0120] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of protection. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A gas detection device, characterized by, The application relates to a gas detection device. The device comprises: a light source for emitting a first optical frequency comb and a second optical frequency comb, the first optical frequency comb comprising a plurality of first spectral lines with equal frequency intervals, the second optical frequency comb comprising a plurality of second spectral lines with equal frequency intervals, the frequency intervals of the first spectral lines and the second spectral lines having a repetition frequency difference; a transduction element connected to the light source, the transduction element being used for accommodating a gas to be detected, the gas to be detected interacting with the first optical frequency comb and the second optical frequency comb respectively to obtain an interference optical signal; a photoelectric detection element connected to the transduction element; 2. The gas detection device of claim 1, wherein, the photoelectric detection element being used for receiving and converting the interference optical signal to obtain a target electrical signal, the target electrical signal being related to the concentration and the type of the gas to be detected. The device further comprises: a first processing component electrically connected to the photoelectric detection element, the first processing component being used for performing Fourier transform processing on the target electrical signal to obtain a radio frequency spectrum of the gas to be detected and amplitudes of frequency components in the radio frequency spectrum; a second processing component electrically connected to the first processing component, the second processing component being used for determining the type of the gas to be detected according to the radio frequency spectrum and determining the concentration of the gas to be detected according to the amplitudes of the frequency components in the radio frequency spectrum.

3. The gas detection device according to claim 1, wherein: the transduction element is arranged as any one of a gas absorption cell, a Mach-Zehnder interferometer, a ring resonator and a Fizeau interferometer.

4. The gas detection device according to claim 1, wherein:

5. A gas detection method characterized by, the transduction element comprises a first single-mode optical fiber, a reverse-resonant hollow-core optical fiber and a second single-mode optical fiber, the first single-mode optical fiber being connected to the light source and the reverse-resonant hollow-core optical fiber respectively, the reverse-resonant hollow-core optical fiber being used for accommodating the gas to be detected, and the second single-mode optical fiber being connected to the reverse-resonant hollow-core optical fiber and the photoelectric detection element respectively. The device comprises the following steps: passing the gas to be detected into a transduction element, wherein the transduction element is connected to a light source and a photoelectric detection element respectively; controlling the light source to emit a first optical frequency comb and a second optical frequency comb, the gas to be detected interacting with the first optical frequency comb and the second optical frequency comb respectively to obtain an interference optical signal, wherein the first optical frequency comb comprises a plurality of first spectral lines with equal frequency intervals, the second optical frequency comb comprises a plurality of second spectral lines with equal frequency intervals, and the frequency intervals of the first spectral lines and the second spectral lines have a repetition frequency difference; 6. The gas detection method according to claim 5, wherein receiving and converting the interference optical signal by the photoelectric detection element to obtain a target electrical signal, the target electrical signal being related to the concentration and the type of the gas to be detected. After the target electrical signal is obtained by receiving and converting the interference optical signal by the photoelectric detection element, the device further comprises the following steps: performing Fourier transform processing on the target electrical signal to obtain a radio frequency spectrum of the gas to be detected and amplitudes of frequency components in the radio frequency spectrum; determining the type of the gas to be detected according to the radio frequency spectrum; determining the concentration of the gas to be detected according to the amplitudes of the frequency components in the radio frequency spectrum.

7. The gas detection method of claim 6, wherein, According to the radio frequency spectrum, the kind of the gas to be measured is determined, comprising the steps of: According to the radio frequency spectrum, the electric frequency is determined; According to the electric frequency, the target frequency absorbed is calculated; According to the target frequency, the kind of the gas to be measured is determined.

8. The gas detection method of claim 7, wherein, According to the electric frequency, the target frequency absorbed is calculated, expressed as: ， ， ， ， ， wherein is the electrical frequency; is the optical frequency of the first spectral line of the first optical frequency comb; is the optical frequency of the first spectral line of the first optical frequency comb; is the optical frequency of the second spectral line of the second optical frequency comb; is the optical frequency of the second spectral line of the second optical frequency comb; is the repetition frequency difference; is the frequency separation of the first spectral line; is the frequency separation of the second spectral line; is the initial frequency difference; is the initial frequency of the first optical frequency comb; is the initial frequency of the second optical frequency comb.

9. The gas detection method of claim 6, wherein, According to the amplitudes corresponding to the frequency components in the radio frequency spectrum, the concentration of the gas to be measured is determined, comprising the steps of: According to the target amplitude, a corresponding table constructed in advance is looked up to determine the concentration of the gas to be measured; wherein the corresponding table is constructed by gas concentration and Fourier transform amplitude calibration.

10. An electronic device comprising: A processor and a memory storing a program, characterized in that the program comprises instructions which, when executed by the processor, cause the processor to perform the gas detection method according to any one of claims 5 to 9.

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