A sensor detection method and system

Abstract

The embodiment of the present application discloses a sensor detection method and system. The sensor detection method comprises: acquiring a multi-peak acquisition signal of a sensor through a one-time continuous extension scanning mode of the sensor or an at least-two-scan-window time-sharing scanning mode, the multi-peak acquisition signal comprising at least two absorption peaks; determining a signal parameter of the multi-peak acquisition signal according to the multi-peak acquisition signal; and determining a wavelength state corresponding to the absorption peak and a gas concentration detected by the sensor according to the signal parameter. The sensor detection method and system provided by the embodiment of the present application can improve detection reliability.

Description

Technical Field

[0001] The embodiments of the present invention relate to sensor detection technology, and more particularly to a sensor detection method and system. Background Technology

[0002] Sensors such as laser gas sensors used in home and industrial safety applications typically employ tunable semiconductor laser absorption spectroscopy as their detection principle. This method utilizes the wavelength tuning characteristics of semiconductor lasers to scan near the characteristic absorption lines of a gas, and then inverts the gas concentration based on the selective absorption intensity of the gas at a specific wavelength. Currently, the reliability of existing sensor detection methods for gas concentration detection needs improvement. Summary of the Invention

[0003] This invention provides a sensor detection method and system to improve detection reliability.

[0004] In a first aspect, embodiments of the present invention provide a sensor detection method, comprising: The sensor acquires a multi-peak acquisition signal by means of a single continuous extended scan or a time-division scan of at least two scan windows, wherein the multi-peak acquisition signal includes at least two absorption peaks; Based on the multi-peak acquisition signal, determine the signal parameters of the multi-peak acquisition signal; Based on the signal parameters, the wavelength state corresponding to the absorption peak and the gas concentration detected by the sensor are determined.

[0005] Optionally, determining the signal parameters of the multi-peak acquisition signal based on the multi-peak acquisition signal includes: The multi-peak acquisition signal is preprocessed to obtain the signal parameters of the multi-peak acquisition signal.

[0006] Optionally, determining the wavelength state corresponding to the absorption peak based on the signal parameters includes: Based on the signal parameters, if it is determined that the peak spacing of at least two absorption peaks in the multi-peak acquisition signal is abnormal or the positions of at least two absorption peaks are shifted, then the wavelengths corresponding to the absorption peaks are calibrated by adjusting the operating parameters of the sensor.

[0007] Optionally, the sensor detection method also includes: If it is determined that the peak spacing of each absorption peak in the multi-peak acquisition signal is normal, the position of each absorption peak is not offset, and the multi-peak acquisition signal is normal, then it is determined that the wavelength corresponding to the absorption peak is normal and does not require calibration.

[0008] Optionally, the signal parameters include at least one of the peak position, peak height, and peak area of ​​the absorption peak in the multi-peak acquisition signal.

[0009] Optionally, determining the wavelength state corresponding to the absorption peak and the gas concentration detected by the sensor based on the signal parameters includes: Based on the signal parameters, if the wavelength corresponding to the absorption peak is normal or after calibrating the wavelength, and based on the multi-peak acquisition signal, if it is determined that the strong main absorption peak in the multi-peak acquisition signal is in a preset effective low range region, then the gas concentration detected by the sensor is determined based on the signal parameters corresponding to the strong main absorption peak. If it is determined that the strong main absorption peak in the multi-peak acquisition signal is not in the preset effective low range region, and the middle absorption peak and / or weak absorption peak in the multi-peak acquisition signal is in the preset effective high range region, then the gas concentration detected by the sensor is determined according to the signal parameters corresponding to the middle absorption peak and / or weak absorption peak.

[0010] Optionally, determining the gas concentration detected by the sensor based on the signal parameters corresponding to the mid-range absorption peak and / or weak absorption peak includes: If at least two absorption peaks exist among the mid-range absorption peaks and / or weak absorption peaks, the gas concentration detected by the sensor is determined based on the signal parameters corresponding to the at least two absorption peaks. If there is only one absorption peak among the mid-range absorption peak and / or weak absorption peak, the gas concentration detected by the sensor is determined based on the signal parameters corresponding to the single absorption peak.

[0011] Optionally, the multi-peak acquisition signal includes a strong main absorption peak, and also includes at least one of a mid-range absorption peak and a weak absorption peak.

[0012] Secondly, embodiments of the present invention provide a sensor detection system, including a sensor and a controller, wherein the controller is electrically connected to the sensor, and the sensor detection method described in the first aspect is executed by the controller.

[0013] Optionally, the sensor is a laser gas sensor.

[0014] The sensor detection method and system provided in this invention include: acquiring a multi-peak acquisition signal from the sensor through a single continuous extended scan or a time-division scanning method with at least two scanning windows, wherein the multi-peak acquisition signal includes at least two absorption peaks; determining signal parameters of the multi-peak acquisition signal based on the multi-peak acquisition signal; and determining the wavelength state corresponding to the absorption peak and the gas concentration detected by the sensor based on the signal parameters. The sensor detection method and system provided in this invention, by determining the wavelength state corresponding to the absorption peak and the gas concentration detected by the sensor based on the signal parameters of the multi-peak acquisition signal, and by combining the detection of gas concentration with at least two absorption peaks, solves the problem in the prior art where using a single absorption peak to detect gas concentration affects detection reliability, thereby improving detection reliability. Attached Figure Description

[0015] Figure 1 This is a flowchart of a sensor detection method provided in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of a gas absorption spectrum provided in Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the absorption peaks of a gas at different concentrations provided in Embodiment 1 of the present invention; Figure 4 This is a flowchart of a sensor detection method provided in Embodiment 2 of the present invention; Figure 5 This is a flowchart of another sensor detection method provided in Embodiment 2 of the present invention; Figure 6 This is a structural block diagram of a sensor detection system provided in Embodiment 3 of the present invention; Figure 7 This is a structural block diagram of a controller provided in Embodiment 3 of the present invention; Figure 8 This is a schematic diagram of the structure of a terminal provided in Embodiment 4 of the present invention. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0017] Example 1 Figure 1This is a flowchart of a sensor detection method provided in Embodiment 1 of the present invention. This embodiment can be applied to sensor detection and other fields. The detection method can be executed by a controller in a sensor detection system. The controller can be implemented in software and / or hardware. The method specifically includes the following steps: Step 110: Acquire the multi-peak acquisition signal of the sensor by means of a single continuous extended scan or a time-division scan of at least two scan windows. The multi-peak acquisition signal includes at least two absorption peaks.

[0018] In one embodiment, the sensor is a laser gas sensor, which emits laser light, such as infrared light, and collects the transmitted light signal after absorption by the gas, i.e., a multi-peak acquisition signal. Exemplarily, the multi-peak acquisition signal includes a strong main absorption peak, a mid-range absorption peak, and a weak absorption peak. The sensor's single continuous extended scan mode refers to the sensor emitting laser light of continuous wavelengths to scan the absorption peaks at once, while the at least two scanning windows time-division scanning mode refers to emitting laser light of at least two wavelengths at different times to scan the absorption peaks.

[0019] Step 120: Determine the signal parameters of the multi-peak acquisition signal based on the multi-peak acquisition signal.

[0020] Specifically, processing the multi-peak acquired signal, such as dark current subtraction, baseline fitting, demodulation, normalization, filtering, and absorbance calculation, yields the absorption curves corresponding to the absorption peaks, thus obtaining the signal parameters. For example, the signal parameters include the peak positions of the absorption peaks in the multi-peak acquired signal.

[0021] Step 130: Determine the wavelength state corresponding to the absorption peak and the gas concentration detected by the sensor based on the signal parameters.

[0022] Specifically, the wavelength corresponding to the absorption peak is determined based on the signal parameters to determine whether calibration is required. If the signal parameters, such as the peak position, shift, the wavelength corresponding to the absorption peak needs to be calibrated. After calibrating the wavelength corresponding to the absorption peak, if the strong main absorption peak in the multi-peak acquisition signal is located in the preset effective low range region, the gas concentration detected by the sensor is determined based on the signal parameters corresponding to the strong main absorption peak. If the strong main absorption peak in the multi-peak acquisition signal is not located in the preset effective low range region, and the mid-range absorption peak and / or weak absorption peak are located in the preset effective high range region, the gas concentration detected by the sensor is determined based on the signal parameters corresponding to the mid-range absorption peak and / or weak absorption peak. Figure 2 This is a schematic diagram of a gas absorption spectrum provided in Embodiment 1 of the present invention. Figure 3 This is a schematic diagram of absorption peaks at different gas concentrations provided in Embodiment 1 of the present invention. (Reference) Figure 2 and Figure 3For example, the gas is methane. The light intensity attenuation after the laser passes through the methane gas follows the Lambert-Beer law. When the absorption is unsaturated and the optical path, temperature, pressure and other conditions are known, the absorption intensity has a clear correspondence with the methane concentration. Figure 2 In this diagram, A, B, C, D, and E all represent wavelengths. A represents the wavelength corresponding to the strong main absorption peak, B represents the wavelength corresponding to the mid-range absorption peak, and C, D, and E all represent the wavelengths corresponding to the weak absorption peaks. For example, A is 1653.7 nm, B is 1656.5 nm, C is 1653.1 nm, D is 1654.1 nm, and E is 1654.2 nm. Figure 3 The sampling points in the data can be understood as the sampling points corresponding to the multi-peak acquisition signal. 0%-100% refers to 0%vol-100%vol. As the gas concentration increases, the strong main absorption peak tends to saturate. The strong main absorption peak is suitable for the detection of low-concentration gases, while the mid-range absorption peak and weak absorption peak are suitable for the detection of high-concentration gases.

[0023] The sensor detection method provided in this embodiment includes: acquiring a multi-peak acquisition signal from the sensor through a single continuous extended scan or a time-division scanning method with at least two scanning windows, wherein the multi-peak acquisition signal includes at least two absorption peaks; determining the signal parameters of the multi-peak acquisition signal based on the multi-peak acquisition signal; and determining the wavelength state corresponding to the absorption peak and the gas concentration detected by the sensor based on the signal parameters. The sensor detection method provided in this embodiment, by determining the wavelength state corresponding to the absorption peak and the gas concentration detected by the sensor based on the signal parameters of the multi-peak acquisition signal, and by combining the detection of gas concentration with at least two absorption peaks, solves the problem in the prior art where using a single absorption peak to detect gas concentration affects the detection reliability, thereby improving the detection reliability.

[0024] Example 2 Figure 4 This is a flowchart of a sensor detection method provided in Embodiment 2 of the present invention. This embodiment can be applied to sensor detection and other fields. The detection method can be executed by a controller in a sensor detection system. The controller can be implemented in software and / or hardware. The method specifically includes the following steps: Step 210: Acquire the multi-peak acquisition signal of the sensor by means of a single continuous extended scan or a time-division scan of at least two scan windows. The multi-peak acquisition signal includes at least two absorption peaks.

[0025] In one embodiment, the sensor is a laser gas sensor. The sensor emits laser light, such as laser light in the visible or infrared band, corresponding to the absorption wavelength of the gas, and collects the transmitted light signal after gas absorption, i.e., a multi-peak acquisition signal. Exemplarily, the multi-peak acquisition signal includes a strong main absorption peak, a mid-range absorption peak, and a weak absorption peak.

[0026] Step 220: Preprocess the multi-peak acquisition signal to obtain the signal parameters of the multi-peak acquisition signal.

[0027] The preprocessing includes at least one of dark current subtraction, baseline fitting, demodulation, normalization, filtering, and absorbance calculation. In one embodiment, the preprocessing includes dark current subtraction, baseline fitting, demodulation, normalization, filtering, and absorbance calculation, and the signal parameters include at least one of the peak position, peak height, and peak area of ​​the absorption peaks in the multi-peak acquisition signal. For example, the signal parameters include the peak position, peak height, and peak area of ​​the absorption peaks in the multi-peak acquisition signal, and also include half-width at half maximum (FWHM), signal-to-noise ratio (SNR), and harmonic intensity.

[0028] Step 230: Based on the signal parameters, if it is determined that the peak spacing of at least two absorption peaks in the multi-peak acquisition signal is abnormal or the positions of at least two absorption peaks are shifted, then the wavelengths corresponding to the absorption peaks are calibrated by adjusting the operating parameters of the sensor.

[0029] Specifically, based on signal parameters such as the peak positions of each absorption peak in a multi-peak acquisition signal, the peak spacing between any two absorption peaks in the multi-peak acquisition signal can be determined. If the peak spacing of at least two absorption peaks exceeds the preset peak spacing range, the peak spacing is determined to be abnormal, and the wavelength corresponding to the absorption peaks needs to be calibrated. Similarly, based on signal parameters such as the peak positions of each absorption peak in a multi-peak acquisition signal, the positions of any two absorption peaks in the multi-peak acquisition signal can be determined. If the positions of at least two absorption peaks exceed their respective preset position ranges, the positions of at least two absorption peaks are determined to be offset, and the wavelength corresponding to the absorption peaks needs to be calibrated. By adjusting the sensor's operating parameters, such as scanning current and scanning amplitude, the peak spacing is made normal, and the positions of the absorption peaks are not offset, thus achieving wavelength calibration. A known mapping relationship exists between the scanning current or temperature and the actual wavelength.

[0030] Step 240: If it is determined that the peak spacing of each absorption peak in the multi-peak acquisition signal is normal, the position of each absorption peak is not offset, and the multi-peak acquisition signal is normal, then it is determined that the wavelength corresponding to the absorption peak is normal and no calibration is required.

[0031] In this context, "no abnormality in multi-peak acquisition signal" means that the peak shapes of each absorption peak in the multi-peak acquisition signal are normal, and there are no missing absorption peaks, i.e., at least two absorption peaks are present in the multi-peak acquisition signal. If only one absorption peak is present in the multi-peak acquisition signal, it indicates that the multi-peak acquisition signal is abnormal, and a corresponding prompt message can be issued.

[0032] Step 250: Based on the signal parameters, determine the wavelength corresponding to the absorption peak. If the strong main absorption peak in the multi-peak acquisition signal is located in the preset effective low range region, then determine the gas concentration detected by the sensor based on the signal parameters corresponding to the strong main absorption peak.

[0033] In one implementation, if the strong main absorption peak is unsaturated, has a complete peak shape, and the signal-to-noise ratio is within a preset range, then the strong main absorption peak in the multi-peak acquisition signal can be determined to be in a preset effective low range region. At this time, the gas concentration is calculated based on the signal parameters corresponding to the strong main absorption peak, combined with temperature, pressure, self-broadening, and a preset nonlinear calibration model, thereby realizing the detection of low-concentration gas. The specific calculation process can be referred to in the gas concentration calculation process in the prior art, and will not be repeated here.

[0034] Step 260: If it is determined that the strong main absorption peak in the multi-peak acquisition signal is not in the preset effective low range region, and the middle absorption peak and / or weak absorption peak in the multi-peak acquisition signal is in the preset effective high range region, then the gas concentration detected by the sensor is determined according to the signal parameters corresponding to the middle absorption peak and / or weak absorption peak, thereby realizing high-concentration gas detection. Specifically, this includes: If there are at least two effective absorption peaks among the mid-range absorption peak and / or weak absorption peak, the gas concentration detected by the sensor is determined based on the signal parameters corresponding to the at least two effective absorption peaks. If there is only one effective absorption peak among the mid-range absorption peak and / or weak absorption peak, the gas concentration detected by the sensor is determined based on the signal parameters corresponding to the effective absorption peak.

[0035] The multi-peak acquisition signal includes a strong main absorption peak, and at least one of a mid-range absorption peak and a weak absorption peak. In one embodiment, the multi-peak acquisition signal includes a strong main absorption peak, a mid-range absorption peak, and a weak absorption peak. Furthermore, when determining the gas concentration detected by the sensor based on the signal parameters corresponding to at least two valid absorption peaks, a weighted fusion or cross-validation method can be used to determine the gas concentration detected by the sensor.

[0036] Figure 5 This is a flowchart of another sensor detection method provided in Embodiment 2 of the present invention. (See reference) Figure 5Before acquiring the multi-peak acquisition signal from the sensor, the sensor is controlled to perform multi-peak scanning. Specifically, the laser wavelength emitted by the sensor within the detection period is controlled to cover the wavelengths corresponding to the strong main absorption peak, weak absorption peak, and mid-range absorption peak of the gas. The sensor can use a single continuous extended scan or a time-division scanning method with at least two narrow scanning windows. The continuous extended scan method covers at least two absorption peaks and their nearby baseline regions within the same period; the time-division scanning method scans the strong main absorption peak window first, then the weak absorption peak window, or dynamically adjusts the scanning order and sampling density of at least two windows according to the gas concentration. The subsequent execution process can refer to steps 210-260 above, and will not be repeated here.

[0037] In addition, when both the strong main absorption peak and the weak absorption peak are within the effective inversion range, the controller calculates the weights based on the signal-to-noise ratio, absorbance, linear range, and historical stability of the two absorption peaks, and performs weighted fusion on the results corresponding to the strong main absorption peak and the weak absorption peak, i.e., the gas concentration, to obtain a wide-range continuous output.

[0038] The sensor detection method provided in this embodiment, based on the multi-peak acquisition signal, determines the gas concentration detected by the sensor according to the signal parameters corresponding to the strong main absorption peak if the strong main absorption peak is determined to be in a preset effective low range region. If the strong main absorption peak is determined not to be in the preset effective low range region, and the mid-range absorption peak and / or weak absorption peak are in the preset effective high range region, the gas concentration detected by the sensor is determined according to the signal parameters corresponding to the mid-range absorption peak and / or weak absorption peak. By combining at least two absorption peaks to detect the gas concentration, the method solves the problem of the impact on detection reliability caused by using a single absorption peak to detect gas concentration in the prior art, thereby improving detection reliability. Furthermore, wavelength calibration is achieved when the wavelength corresponding to the absorption peak needs to be calibrated based on the signal parameters of the multi-peak acquisition signal.

[0039] Example 3 Figure 6 This is a structural block diagram of a sensor detection system provided in Embodiment 3 of the present invention. (Reference) Figure 6 It includes a sensor 10 and a controller 20. The controller 20 is electrically connected to the sensor 10. As in any embodiment of the present invention, the sensor detection method is executed by the controller. The specific execution process can be referred to any of the above embodiments, and will not be repeated here.

[0040] Optionally, the sensor is a laser gas sensor.

[0041] Specifically, the laser gas sensor is used to emit laser signals, such as infrared light, and to collect the transmitted light signal after passing through a gas, such as methane. The laser gas sensor includes a tunable semiconductor laser, a laser drive circuit, collimating optical components, a gas absorption optical path, and a photoelectric sensing module, all electrically connected to the controller. The controller is used for overall system control and management, including laser scanning control, signal sampling synchronization, dual-peak search, concentration inversion, wavelength calibration, status monitoring, and alarm output. The tunable semiconductor laser emits near-infrared laser light covering strong main absorption peaks, mid-range absorption peaks, and weak absorption peaks. The controller controls the laser wavelength scanning range by adjusting the laser's operating current, temperature, or a scan lookup table. The laser drive circuit provides a stable DC bias and scanning modulation current to the laser and adjusts the laser's center current and scanning amplitude according to the wavelength. The gas absorption optical path allows the laser to pass through the gas being measured and can employ an open optical path, a closed gas chamber, a short-path gas chamber, a multi-reflection gas chamber, or other adaptable structures. Gas absorption optical paths can be applied to single-channel optical paths, dual-channel optical paths with beam splitting, open gas diffusion optical paths, pump-suction gas chamber optical paths, or multi-reflection long-path optical paths. The photoelectric sensing module receives the transmitted light after gas absorption and converts the optical signal into an electrical signal. Furthermore, a small reference gas chamber or a calibration gas of known concentration can be installed inside the sensor to ensure that the bimodal calibration, i.e., the aforementioned wavelength calibration process, is performed under stable concentration conditions.

[0042] Figure 7 This is a structural block diagram of a controller provided in Embodiment 3 of the present invention. (See reference) Figure 7 The controller includes a signal acquisition unit 310, a parameter determination unit 320, and a detection unit 330. The signal acquisition unit 310 is used to acquire a multi-peak acquisition signal from the sensor through a single continuous extended scan or a time-division scanning method with at least two scanning windows. The multi-peak acquisition signal includes at least two absorption peaks. The parameter determination unit 320 is used to determine the signal parameters of the multi-peak acquisition signal based on the multi-peak acquisition signal. The detection unit 330 is used to determine the wavelength state corresponding to the absorption peak and the gas concentration detected by the sensor based on the signal parameters.

[0043] Based on the above implementation method, the parameter determination unit 320 is specifically used to preprocess the multi-peak acquisition signal to obtain the signal parameters of the multi-peak acquisition signal.

[0044] In one embodiment, the detection unit 330 includes a wavelength calibration subunit, which is used to calibrate the wavelength corresponding to the absorption peak by adjusting the operating parameters of the sensor if it is determined that the peak spacing of at least two absorption peaks in the multi-peak acquisition signal is abnormal or the positions of at least two absorption peaks are shifted, based on the signal parameters.

[0045] Optionally, the detection unit 330 includes a state determination subunit; the state determination subunit is used to determine that if the peak spacing of each absorption peak in the multi-peak acquisition signal is normal, the position of each absorption peak is not offset, and the multi-peak acquisition signal is not abnormal, then the wavelength corresponding to the absorption peak is normal and does not require calibration.

[0046] In one embodiment, the detection unit 330 includes: a first detection subunit and a second detection subunit; wherein, the first detection subunit is used to determine, based on signal parameters, whether the wavelength corresponding to the absorption peak is normal or after calibrating the wavelength, and based on the multi-peak acquisition signal, if it is determined that the strong main absorption peak in the multi-peak acquisition signal is in a preset effective low range region, then based on the signal parameters corresponding to the strong main absorption peak, determine the gas concentration detected by the sensor; the second detection subunit is used to determine the gas concentration detected by the sensor based on the signal parameters corresponding to the mid-range absorption peak and / or weak absorption peak if it is determined that the strong main absorption peak in the multi-peak acquisition signal is not in the preset effective low range region, and the mid-range absorption peak and / or weak absorption peak in the multi-peak acquisition signal is in a preset effective high range region.

[0047] Optionally, the first detection subunit is specifically used to determine the gas concentration detected by the sensor based on the signal parameters corresponding to the at least two absorption peaks if there are at least two absorption peaks among the mid-range absorption peak and / or weak absorption peak; and to determine the gas concentration detected by the sensor based on the signal parameters corresponding to the one absorption peak if there is only one absorption peak among the mid-range absorption peak and / or weak absorption peak.

[0048] The sensor detection system provided in this embodiment belongs to the same inventive concept as the sensor detection method provided in any embodiment of the present invention and has corresponding beneficial effects. For technical details not covered in this embodiment, please refer to the sensor detection method provided in any embodiment of the present invention.

[0049] Example 4 Figure 8 This is a schematic diagram of the structure of a terminal provided in Embodiment 4 of the present invention. Figure 8 A block diagram of an exemplary device 412 suitable for implementing embodiments of the present invention is shown. Figure 8 The device 412 shown is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments of the present invention.

[0050] like Figure 8 As shown, device 412 is represented as a general-purpose device. Components of device 412 may include, but are not limited to: one or more processors 416, storage device 428, and bus 418 connecting different system components (including storage device 428 and processor 416).

[0051] Bus 418 represents one or more of several bus architectures, including a memory device bus or memory device controller, a peripheral bus, a graphics acceleration port, a processor, or a local bus using any of the various bus architectures. Examples of these architectures include, but are not limited to, the Industry Subversive Alliance (ISA) bus, the Micro Channel Architecture (MAC) bus, the Enhanced ISA bus, the Video Electronics Standards Association (VESA) local bus, and the Peripheral Component Interconnect (PCI) bus.

[0052] Device 412 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by device 412, including volatile and non-volatile media, removable and non-removable media.

[0053] Storage device 428 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 430 and / or cache memory 432. Device 412 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, storage system 434 may be used to read and write non-removable, non-volatile magnetic media (… Figure 8 Not shown; usually referred to as a "hard drive"). Although Figure 8 As not shown, a disk drive for reading and writing to a removable non-volatile disk (e.g., a "floppy disk") and an optical disc drive for reading and writing to a removable non-volatile optical disc, such as a Compact Disc Read-Only Memory (CD-ROM), a Digital Video Disc Read-Only Memory (DVD-ROM), or other optical media. In these cases, each drive may be connected to bus 418 via one or more data media interfaces. Storage device 428 may include at least one program product having a set (e.g., at least one) of program modules configured to perform the functions of the embodiments of the present invention.

[0054] A program / utility 440 having a set (at least one) of program modules 442 may be stored in, for example, a storage device 428. Such program modules 442 include, but are not limited to, an operating system, one or more application programs, other program modules, and program data. Each or some combination of these examples may include an implementation of a network environment. Program modules 442 typically perform the functions and / or methods described in the embodiments of the present invention.

[0055] Device 412 can also communicate with one or more external devices 414 (e.g., keyboard, pointing terminal, display 424, etc.), and with one or more terminals that enable a user to interact with device 412, and / or with any terminal that enables device 412 to communicate with one or more other computing terminals (e.g., network card, modem, etc.). This communication can be performed via input / output (I / O) interface 422. Furthermore, device 412 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) via network adapter 420. Figure 8 As shown, network adapter 420 communicates with other modules of device 412 via bus 418. It should be understood that, although not shown in the figure, other hardware and / or software modules can be used in conjunction with device 412, including but not limited to: microcode, terminal drivers, redundant processors, external disk drive arrays, Redundant Arrays of Independent Disks (RAID) systems, tape drives, and data backup storage systems.

[0056] The processor 416 (which can be considered as the controller described above) executes various functional applications and data processing by running programs stored in the storage device 428, such as implementing the sensor detection method provided in the embodiments of the present invention, which includes: Acquire multi-peak acquisition signals from the sensor, which include at least two absorption peaks; Determine the signal parameters of the multi-peak acquisition signal based on the multi-peak acquisition signal; Based on the signal parameters, determine the wavelength state corresponding to the absorption peak and the gas concentration detected by the sensor.

[0057] Example 5 Embodiment 5 of the present invention provides a computer-readable storage medium storing a computer program thereon. When executed by a controller, the program implements the sensor detection method provided in the embodiments of the present invention, the method comprising: Acquire multi-peak acquisition signals from the sensor, which include at least two absorption peaks; Determine the signal parameters of the multi-peak acquisition signal based on the multi-peak acquisition signal; Based on the signal parameters, determine the wavelength state corresponding to the absorption peak and the gas concentration detected by the sensor.

[0058] The computer storage medium of this invention can be any combination of one or more computer-readable media. A computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium can be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of computer-readable storage media (a non-exhaustive list) include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0059] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, capable of sending, propagating, or transmitting programs for use by or in connection with an instruction execution system, apparatus, or device.

[0060] Program code contained on a computer-readable medium may be transmitted using any suitable medium, including—but not limited to—wireless, wire, optical fiber, RF, etc., or any suitable combination thereof.

[0061] Computer program code for performing the operations of this invention can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as "C" or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or terminal. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0062] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, rearrangements, combinations, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A sensor detection method, characterized in that, include: The sensor acquires a multi-peak acquisition signal by means of a single continuous extended scan or a time-division scan of at least two scan windows, wherein the multi-peak acquisition signal includes at least two absorption peaks; Based on the multi-peak acquisition signal, determine the signal parameters of the multi-peak acquisition signal; Based on the signal parameters, the wavelength state corresponding to the absorption peak and the gas concentration detected by the sensor are determined.

2. The sensor detection method according to claim 1, characterized in that, The step of determining the signal parameters of the multi-peak acquisition signal based on the multi-peak acquisition signal includes: The multi-peak acquisition signal is preprocessed to obtain the signal parameters of the multi-peak acquisition signal.

3. The sensor detection method according to claim 1, characterized in that, Determining the wavelength state corresponding to the absorption peak based on the signal parameters includes: Based on the signal parameters, if it is determined that the peak spacing of at least two absorption peaks in the multi-peak acquisition signal is abnormal or the positions of at least two absorption peaks are shifted, then the wavelengths corresponding to the absorption peaks are calibrated by adjusting the operating parameters of the sensor.

4. The sensor detection method according to claim 3, characterized in that, Also includes: If it is determined that the peak spacing of each absorption peak in the multi-peak acquisition signal is normal, the position of each absorption peak is not offset, and the multi-peak acquisition signal is normal, then it is determined that the wavelength corresponding to the absorption peak is normal and does not require calibration.

5. The sensor detection method according to claim 2 or 3, characterized in that, The signal parameters include at least one of the peak position, peak height, and peak area of ​​the absorption peak in the multi-peak acquisition signal.

6. The sensor detection method according to claim 1, characterized in that, Determining the wavelength state corresponding to the absorption peak and the gas concentration detected by the sensor based on the signal parameters includes: Based on the signal parameters, if the wavelength corresponding to the absorption peak is normal or after calibrating the wavelength, and based on the multi-peak acquisition signal, if it is determined that the strong main absorption peak in the multi-peak acquisition signal is in a preset effective low range region, then the gas concentration detected by the sensor is determined based on the signal parameters corresponding to the strong main absorption peak. If it is determined that the strong main absorption peak in the multi-peak acquisition signal is not in the preset effective low range region, and the middle absorption peak and / or weak absorption peak in the multi-peak acquisition signal is in the preset effective high range region, then the gas concentration detected by the sensor is determined according to the signal parameters corresponding to the middle absorption peak and / or weak absorption peak.

7. The sensor detection method according to claim 6, characterized in that, The step of determining the gas concentration detected by the sensor based on the signal parameters corresponding to the mid-range absorption peak and / or weak absorption peak includes: If at least two absorption peaks exist among the mid-range absorption peaks and / or weak absorption peaks, the gas concentration detected by the sensor is determined based on the signal parameters corresponding to the at least two absorption peaks. If there is only one absorption peak among the mid-range absorption peak and / or weak absorption peak, the gas concentration detected by the sensor is determined based on the signal parameters corresponding to the single absorption peak.

8. The sensor detection method according to claim 1, characterized in that, The multi-peak acquisition signal includes a strong main absorption peak, and also includes at least one of a mid-range absorption peak and a weak absorption peak.

9. A sensor detection system, characterized in that, It includes a sensor and a controller, the controller being electrically connected to the sensor, and the sensor detection method as described in any one of claims 1-8 is executed by the controller.

10. The sensor detection system according to claim 9, characterized in that, The sensor is a laser gas sensor.

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