Laser gas telemetering system based on remote calculation and control

Abstract

The utility model provides a laser gas telemetering system based on remote calculation and control, which comprises a laser receiving and transmitting optical path passing through target gas, and a semiconductor laser and an aiming laser in the laser receiving and transmitting optical path are connected with a laser driving module. A detection laser beam emitted by the laser receiving and transmitting optical path penetrates through target gas and then is transmitted to the photoelectric conversion module, the laser driving module and the photoelectric conversion module are both connected with the data conversion and communication module, and the data conversion and communication module is connected with the remote calculation and control module and the display alarm module. According to the utility model, a wireless data communication technology, a remote calculation and control technology, a tunable laser absorption spectrum technology and a laser remote measurement technology are fused, the problems of high false alarm rate, slow data calculation and the like of the existing detection system are solved, and the monitoring and early warning requirements of high detection speed, high detection precision and few false alarms are met.

Description

Technical Field

[0001] The utility model relates to the technical field of laser gas remote sensing, in particular to a laser gas remote sensing system based on remote calculation and control. Background Art

[0002] Laser gas telemetry, with its advantages of high sensitivity, long-range, and non-contact measurement, has been widely used in multiple fields and is an essential component of modern environmental monitoring and safety protection technology. However, due to complex application scenarios and changing background reflectors, laser gas telemetry may experience false alarms during gas detection or inspections. In recent years, the development of digital signal processing technology and artificial intelligence algorithms has made laser gas telemetry systems more intelligent and adaptable, capable of providing high-precision gas detection in more complex and changing environments. However, artificial intelligence algorithms are generally combined with machine learning to extract deep information from massive amounts of laser telemetry data for pattern recognition, trend prediction, anomaly detection, and other tasks, all of which require powerful computing and analytical capabilities.

[0003] Existing laser gas remote sensing devices typically use digital processing circuits such as single-chip microcomputers, FPGAs, and DSPs to analyze data, resulting in relatively slow computational speeds. Therefore, a laser gas remote sensing device with fast detection speed, high accuracy, and minimal false alarms is urgently needed to address the shortcomings of existing detection methods and technologies.

[0004] The utility model patent application number 202220137919.5 discloses an Internet of Things laser gas leak monitoring system, which relates to the field of laser monitoring technology and includes a display terminal, a remote monitoring server, and several monitoring units. The monitoring units include a laser gas sensor and a signal transmission base station. The monitoring unit is connected to the remote monitoring server via an NBlot wireless signal via the signal transmission base station, and the remote monitoring server is connected to the display terminal via a network communication connection. The above utility model uses a laser gas sensor as a gas leak detection device, combined with a control circuit and current laser absorption spectroscopy analysis technology. On the one hand, it can make the monitoring equipment run stably for a longer time, without the need for regular adjustments by staff, and the gas detection sensitivity is higher and the detection range is larger. In combination with the signal transmission base station, the entire gas leak monitoring operation can achieve the effect of remote supervision, truly achieving the purpose of efficient and accurate monitoring. However, the remote control in the above patent is mainly for remote supervision. When there is an interference signal in the laser gas sensor, it is prone to false alarms. Utility Model Content

[0005] To address the technical issues of existing laser gas telemetry instruments, which suffer from slow calculation speeds, low detection accuracy, and the susceptibility to false alarms, this utility model proposes a laser gas telemetry system based on remote calculation and control. This system places all computational effort at the remote end, resulting in fast calculation speeds and fewer false alarms. Furthermore, the local sensor system is simple and power-efficient. This system meets the monitoring and early warning needs of fast detection speed, high sensitivity, high accuracy, and few false alarms, addressing the shortcomings of existing detection methods and technologies.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the present invention is implemented as follows: a laser gas telemetry system based on remote computing and control, including a laser light receiving and transmitting circuit passing through the target gas, and also including a laser driving module, a data conversion and communication module, a display alarm module and a remote computing and control module. The semiconductor laser and the aiming laser in the laser light receiving and transmitting circuit are connected to the laser driving module. The detection laser beam emitted by the laser light receiving and transmitting circuit matches the photoelectric conversion module after passing through the target gas. The laser driving module and the photoelectric conversion module are both connected to the data conversion and communication module. The data conversion and communication module are respectively connected to the remote computing and control module and the display alarm module.

[0007] The laser light-receiving and light-emitting circuit includes an aiming laser, a semiconductor laser, a receiving lens, and a photoelectric conversion module. The aiming laser and the semiconductor laser are both connected to a laser driving module. The laser light emitted by the aiming laser and the semiconductor laser passes through the target gas and is irradiated into the detection area. A background reflector is provided on the rear side of the detection area. The laser light reflected by the background reflector passes through the target gas again and is irradiated onto the receiving lens. The photoelectric conversion module is provided at the focus of the receiving lens.

[0008] Preferably, a collimation system is provided on the rear side of the aiming laser and the semiconductor laser, and the collimation system is arranged in front of the detection area; the aiming laser is a visible light laser, and the semiconductor laser is a near-infrared DFB laser, a mid-infrared ICL or a QCL laser; the collimation system is a collimating lens or a fiber collimator.

[0009] Preferably, the photoelectric conversion module includes a filter and a photodetector, the filter is arranged between the photodetector and the receiving lens, and the photodetector is connected to the data conversion and communication module.

[0010] Preferably, the photodetector is a detector or a detector array, and the detector is an InGaAs photodetector, a mercury cadmium telluride detector or a lead selenide detector.

[0011] Preferably, the photodetector includes a photodiode, which is arranged at the focus of the receiving lens, the photodiode is connected to the pre-operational amplifier, the pre-operational amplifier is connected to the secondary amplifier circuit, and the secondary amplifier circuit is connected to the data conversion and communication module.

[0012] Preferably, the data conversion and communication module is connected to the power supply module.

[0013] Preferably, the data conversion and communication module includes a data conversion unit and a wireless communication unit; the data conversion unit includes an MCU, an AD conversion chip and a DA conversion chip, the power supply module, the display alarm module, the AD conversion chip, the DA conversion chip and the wireless communication unit are all connected to the MCU, the wireless communication unit is connected to the remote computing and control module, the DA conversion chip is connected to the laser driving module, and the AD conversion chip is connected to the secondary amplification circuit of the photoelectric detector of the photoelectric conversion module.

[0014] Preferably, the laser driving module includes a current driving unit and a temperature control unit, the current driving unit is connected to the aiming laser and the semiconductor laser respectively, and the temperature control unit is connected to the semiconductor laser; the current driving unit and the temperature control unit are both connected to the DA conversion chip of the data conversion and communication module.

[0015] Preferably, the receiving lens is coated with an anti-reflection film of the measurement band.

[0016] Compared with existing technologies, the present invention has the following advantages: it integrates wireless data communication technology, remote computing and control technology with tunable laser absorption spectroscopy (TDLAS) and laser telemetry technology to propose a laser gas telemetry system based on remote computing and control. This system solves the problems of high false alarm rate and slow data calculation in existing detection systems, and meets the monitoring and early warning needs of fast detection speed, high detection accuracy and low false alarm. The present invention also has the following advantages:

[0017] 1. Placing calculation and control at the remote end can reduce the complexity of the detection equipment system, making the equipment more power-efficient, compact and lightweight.

[0018] 2. The remote computer has powerful computing power and can mine deep information from massive laser telemetry data to perform pattern recognition, trend prediction, and anomaly detection. It can eliminate false alarm signals, ensure the accuracy of measurement results, reduce false alarm rates, and at the same time, have a fast detection speed.

[0019] 3. This utility model not only improves the efficiency and flexibility of data processing, but also enhances the security of data and promotes the intelligent and in-depth application of data analysis.

[0020] 4. This utility model can achieve instant storage and backup without worrying about local storage limitations.

[0021] 5. The utility model can be applied to vehicles such as electric vehicles and motor vehicles, and can also be carried on unmanned driving equipment such as drones and unmanned vehicles for inspection.

[0022] 6. The utility model can measure different gases, such as ethane, ammonia, hydrogen sulfide, carbon monoxide, acetylene, etc., by replacing lasers with different central wavelengths. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 It is a structural diagram of the present utility model.

[0025] Figure 2 This is a circuit diagram of the photoelectric detector of the present utility model.

[0026] Figure 3 This is a schematic diagram of the data conversion and communication module of the utility model.

[0027] In the figure, 1 is the aiming laser, 2 is the semiconductor laser, 3 is the laser driving module, 4 is the data conversion and communication module, 5 is the display alarm module, 6 is the power supply module, 7 is the receiving lens, 8 is the photoelectric conversion module, 9 is the remote calculation and control module, 10 is the target gas, and 11 is the background reflector. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] like Figure 1As shown, a laser gas telemetry system based on remote computing and control includes a laser light-receiving and receiving path that passes through a target gas 10. The target gas 10 is a gas mass within a detection area, and the gas mass is located in the optical path after laser emission and reflection. The semiconductor laser and aiming laser in the laser light-receiving and receiving path are connected to a laser driver module 3, which drives the laser in the laser light-receiving and receiving path to emit light. The detection laser beam emitted by the laser light-receiving and receiving path, after passing through the target gas, is matched with a photoelectric conversion module 8, which is located in the reflected optical path of the laser light-receiving and receiving path and receives the reflected signal. Both the laser driver module 3 and the photoelectric conversion module 8 are connected to a data conversion and communication module 4, which is connected to a remote computing and control module 9 and a display and alarm module 5, respectively. The data conversion and communication module 4 transmits the collected signal to the remote computing and control module 9 for calculation, determines whether to issue an alarm based on the calculation result, and transmits the calculation result and alarm information via the data conversion and communication module 4 to the display and alarm module 5 for display or alarm. The data conversion and communication module 4 is connected to the power supply module 6, which supplies power to the entire telemetry system.

[0030] Among them, the laser light receiving and transmitting circuit includes an aiming laser 1, a semiconductor laser 2, a receiving lens 7 and a photoelectric conversion module 8. The aiming laser 1 and the semiconductor laser 2 are both connected to the laser driving module 3. The lasers emitted by the aiming laser 1 and the semiconductor laser 2 are irradiated onto the target gas 10 in the detection area. A background reflector 11 is provided on the rear side of the detection area. The light reflected by the background reflector 11 passes through the target gas 10 and is irradiated onto the receiving lens 7. A photoelectric conversion module 8 is provided at the focus of the receiving lens 7.

[0031] The laser drive signal output by the remote computing and control module 9 passes through the data conversion and communication module 4, where it undergoes D / A conversion and is then transmitted to the laser drive module 3. The converted laser drive signal drives the semiconductor laser 2 and aiming laser 1 in the laser light-receiving and light-emitting circuits to emit detection laser light and aiming laser light, respectively. The detection laser light passes through the target gas 10 and is reflected by background reflectors 11. The receiving lens 7 focuses the reflected light onto the photodetector in the photoelectric conversion module 8. After photoelectric conversion, it is transmitted to the data conversion and communication module 4, which converts the data into a digital signal and transmits it to the remote computing and control module 9 via wireless communication. After amplifying and filtering the received signal, the remote computing and control module 9 classifies and extracts features from the photodetection signal, compares it with a standard photodetection signal, and analyzes the similarity. When the similarity is greater than or equal to a similarity threshold, the target gas concentration in the detection area is calculated; when the similarity is less than the similarity threshold, the detection signal is discarded. The data processing by the remote computing and control module 9 eliminates false positives, ensuring the accuracy of the measurement results. The remote calculation and control module 9 transmits the gas concentration information to the display and alarm module 5 through the data conversion and communication module 4 for display and alarm. The display and alarm module 5 includes a liquid crystal display and an audible and visual alarm, both of which are connected to the data conversion and communication module 4.

[0032] A collimation system, typically a collimating lens or fiber collimator, is installed behind the aiming laser 1 and the semiconductor laser 2. The collimation system is positioned before the detection area. The detection laser light emitted by the semiconductor laser 2 and the aiming laser light emitted by the aiming laser 1 are collimated and emitted into the detection area. After being reflected by background reflectors 11, the reflected light is converged by a receiving lens 7 and received by a photoelectric conversion module 8.

[0033] Semiconductor laser 2 is a currently mainstream semiconductor laser, typically a near-infrared DFB laser, a mid-infrared ICL, or a QCL laser. Mid-infrared ICL and QCL lasers can detect a wider range of gases and have higher sensitivity. Aiming laser 1 is a visible light laser used to indicate the detection position of the detection laser. Since the detection laser is invisible and the detection position is unclear, the aiming laser is placed parallel to the detection laser's detection point to indicate the detection laser's detection position.

[0034] The photoelectric conversion module 8 includes a filter and a photodetector. The filter is positioned between the photodetector and the receiving lens 7. The filter is used to filter the focused laser light and transmit the filtered detection light signal to the photodetector. The photodetector converts the light signal into an electrical signal. The photodetector is connected to the data conversion and communication module 4 and transmits the collected electrical signal to the data conversion and communication module 4. The receiving lens 7 is coated with an anti-reflection coating for the measurement band to improve transmittance and increase the measurement distance. The filter is a narrow-band interference filter that is transparent to the measurement band and filters out interfering light such as sunlight, improving the signal-to-noise ratio and reducing false alarms. The photodetector is a detector or detector array that responds to the detection laser and is generally an InGaAs photodetector or a detector or detector array made of mercury cadmium telluride or lead selenide. InGaAs photodetectors are used to receive near-infrared light, while mercury cadmium telluride or lead selenide detectors are used to receive mid-infrared laser light. Detector arrays are required when the detection area is large and large-area scanning or linear scanning is required.

[0035] The laser drive module 3 is connected to the data conversion and communication module 4, the semiconductor laser 2, and the aiming laser 1. The laser drive module 3 includes a current drive unit and a temperature control unit. The current drive unit is connected to the aiming laser 1 and the semiconductor laser 2, respectively, and the temperature control unit is connected to the semiconductor laser 2. Both the current drive unit and the temperature control unit are connected to the DA converter chip of the data conversion and communication module 4, converting the control signal into an analog signal to drive and control the semiconductor laser 2 and the aiming laser 1.

[0036] After determining the driving current of the semiconductor laser 2, the temperature control module adjusts the temperature of the TEC (thermoelectric cooler) inside the laser in real time to make the wavelength output by the semiconductor laser 2 always lock on the absorption peak of the target gas 10. The laser driving signal output by the remote computing and control module 9 is transmitted to the current driving module through the data conversion and communication module 4 to control the semiconductor laser 2, drive the semiconductor laser 2 to emit light, and at the same time, the temperature control unit in the laser driving module 3 adjusts the TEC of the semiconductor laser 2 in real time to make the output wavelength of the semiconductor laser 2 always stable on the absorption peak of the gas. The remote computing and control module 9 sends the laser driving signal, which is converted by DA after being converted, to the current driving unit to drive the semiconductor laser 2 to emit light. Generally, the laser driving signal is a sawtooth wave, a sine wave, or a sawtooth wave superimposed on a sine wave. The temperature control circuit of the temperature control unit adopts negative feedback. When the temperature is constant, a wide temperature range is first scanned to determine the temperature value when the laser wavelength is on the absorption peak of the gas. Then, the MCU records the digital quantity of the voltage corresponding to this temperature. The voltage value is the set voltage value. After being compared with the voltage value fed back by the internal thermistor of the laser and input into the operational amplifier, the voltage value is transmitted to the temperature control chip to control the size and direction of the current on the internal TEC, heat and cool the semiconductor laser 2, and make the die of the semiconductor laser 2 stable at the set temperature.

[0037] As shown in Figure 3 The data conversion and communication module 4 includes a data conversion unit and a wireless communication unit, and the data conversion unit is connected with the wireless communication unit. The data conversion unit includes an MCU, an AD conversion chip, and a DA conversion chip. The power supply module 6, the display and alarm module 5, the AD conversion chip, the DA conversion chip, and the wireless communication module are all connected with the MCU. The wireless communication module is connected with the remote computing and control module 9. The DA conversion chip is connected with the laser driving module 3. The AD conversion chip is connected with the secondary amplification circuit of the photodetector of the photoelectric conversion module 8. The wireless communication module includes WIFI, 4G, 5G, etc. The MCU can perform encryption processing on the communication data. For example, the data can be encrypted and transmitted through existing specific encryption algorithms or keys. After receiving the encrypted data, the remote computing and control module 9 decrypts the data through the corresponding decryption algorithm and key, and then performs data calculation and processing analysis after decryption.

[0038] The remote computing and control module 9 primarily performs data processing, analysis, and decision-making. Upon receiving a large amount of detector signals (data), it amplifies and filters the received signals using existing machine learning methods. The photoelectric detection signals are then classified and feature extracted. These signals are then compared with standard photoelectric detection signals for similarity analysis. When the similarity is greater than or equal to a threshold, the target gas concentration in the detection area is calculated. When the similarity is less than the threshold, the detection signal is discarded. This method extracts effective information from weak echo signals while suppressing noise interference. Due to the powerful computing power of the remote computer in the remote computing and control module 9, it can mine deep insights from massive amounts of laser telemetry data. It can also perform pattern recognition, trend prediction, and anomaly detection, eliminating false alarms and ensuring the accuracy of measurement results. Data can also be stored, enabling instantaneous storage and backup, without worrying about local storage limitations. The remote computing and control module transmits gas concentration information via the communication module to the display and alarm module for real-time display and alarming. Specific embodiment:

[0040] For methane gas remote sensing, a DFB laser with a central wavelength of 1653.7 nm or a quantum cascade laser with a central wavelength of 3260.2 nm is used as the laser light source. The photodetector or photodetector array can be an InGaAs detector or array or a mercury cadmium telluride detector or array. For area scanning, an area array detector is used; for linear detection, a linear array detector is used. The receiving lens 7 is an aspheric lens coated with an antireflection coating near 1653.7 nm or 3260.2 nm. This coating improves the transmittance of the receiving lens to the measurement laser, thereby increasing the remote sensing distance. The filter is a narrowband interference filter near 1653.7 nm or 3260.2 nm. The aiming laser 1 is a 532 nm green laser. The detection and aiming lasers can be emitted separately or combined by a laser beam combiner and then collimated by a laser collimation system. This beam combination aligns the detection and aiming laser positions, aligning the aiming point with the detection point, providing a better user experience. After passing through the target gas 10, the detection laser is reflected by the background reflector 11. The photoelectric detector or array receives the return light signal absorbed by the target gas 10, and after conversion by the photoelectric detector, it is transmitted to the data conversion and communication module 4. After the analog signal is converted into a digital signal, it is transmitted to the remote calculation and control module 9 through the wireless communication module. After analyzing and processing the signal, the concentration information of the target gas 10 in the target area is calculated.

[0041] like Figure 2 As shown, the photoelectric detector is set at the focus of the receiving lens 7, the photoelectric detector is connected to the pre-operational amplifier, the pre-operational amplifier is connected to the secondary amplifier circuit, and the secondary amplifier circuit is connected to the data conversion and communication module 4. The photoelectric conversion circuit of the photoelectric detector is as shown in FIG. Figure 2 As shown, the light signal collected by the photodetector PD is converted into an electrical signal through a pre-amplifier, then passes through a secondary amplifier circuit and is transmitted to the data conversion and communication module 4. The pre-amplifier includes an operational amplifier U1. The inverting input of operational amplifier U1 is connected to the cathode of the photodiode PD, resistor R1, and one end of capacitor C1, respectively. The non-inverting input of operational amplifier U1 and the positive electrode of the photodiode PD are both grounded. The other ends of resistor R1 and capacitor C1 are both connected to the output of operational amplifier U1. Resistor R1 serves as a feedback resistor, and C1 serves as a feedback capacitor. The output of operational amplifier U1 is connected to the secondary amplifier circuit. The secondary amplifier circuit includes an operational amplifier U2. The non-inverting input of operational amplifier U2 is connected to GND via resistor R4. The inverting input of operational amplifier U2 is connected to the output of operational amplifier U1 via resistor R2. The inverting input of operational amplifier U2 is connected to the output of operational amplifier U2 via resistor R3. The output of operational amplifier U2 is connected to the A / D converter chip of the data conversion and communication module 4. The circuit gain can be calculated based on the resistance values ​​of resistors R2 and R3: Circuit Gain = R2 / R3. Resistor R4 is a balancing resistor used to maintain the symmetry of the op amp differential circuit. Typically, R4 = R2 / R3.

[0042] like Figure 3 As shown, the data conversion and communication module 4 includes an MCU, an AD conversion chip, a DA conversion chip, and a wireless communication module. The MCU is connected to the DA conversion chip, the AD conversion chip, and the wireless communication module, respectively, and is mainly used for data conversion and communication. The wireless communication unit is WIFI, 4G, or 5G.

[0043] The remote computing and control module 9 uses machine learning methods to amplify, filter, classify, and extract features from the received detector data, extracting effective information from weak echo signals while suppressing noise interference. Due to the remote computer's powerful computing capabilities, it can mine deep insights from massive amounts of laser telemetry data, perform multidimensional pattern recognition, trend prediction, and anomaly detection, eliminating false positives and ensuring the accuracy of measurement results. The data is also stored, enabling real-time storage and backup, facilitating data analysis.

[0044] The gas concentration information calculated by the remote calculation and control module 9 is transmitted in real time to the display and alarm module 5 via the wireless communication module. When the concentration exceeds the preset alarm threshold, the display and alarm module 5 issues an alarm signal, such as sound, light, or vibration, to alert the inspector. The remote calculation and control module 9 also reports the alarm information to the management center and stores the alarm data.

[0045] The laser gas telemetry system of the present invention can be applied to vehicles such as electric vehicles and motor vehicles, and can also be carried on unmanned driving equipment such as drones and unmanned vehicles for intelligent inspection.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A laser gas telemetry system based on remote computing and control, comprising a laser light-transmitting and light-receiving path passing through a target gas (10), characterized in that: The invention also includes a laser driving module (3), a data conversion and communication module (4), a display alarm module (5) and a remote calculation and control module (9). The semiconductor laser (2) and the aiming laser (1) in the laser light receiving and transmitting circuit are connected to the laser driving module (3). The detection laser beam emitted by the laser light receiving and transmitting circuit matches the photoelectric conversion module (8) after passing through the target gas. The laser driving module (3) and the photoelectric conversion module (8) are both connected to the data conversion and communication module (4). The data conversion and communication module (4) is respectively connected to the remote calculation and control module (9) and the display alarm module (5).

2. The laser gas telemetry system based on remote computing and control according to claim 1, characterized in that: The laser light-receiving and light-emitting circuit comprises an aiming laser (1), a semiconductor laser (2), a receiving lens (7) and a photoelectric conversion module (8). The aiming laser (1) and the semiconductor laser (2) are both connected to a laser driving module (3). The laser light emitted by the aiming laser (1) and the semiconductor laser (2) passes through a target gas (10) and is irradiated into a detection area. A background reflector (11) is provided at the rear side of the detection area. The laser light reflected by the background reflector (11) passes through the target gas (10) again and is irradiated onto the receiving lens (7). The photoelectric conversion module (8) is provided at the focus of the receiving lens (7).

3. The laser gas telemetry system based on remote computing and control according to claim 2, characterized in that: A collimation system is provided on the rear side of the aiming laser (1) and the semiconductor laser (2), and the collimation system is arranged in front of the detection area; the aiming laser (1) is a visible light laser, and the semiconductor laser (2) is a near-infrared DFB laser, a mid-infrared ICL or a QCL laser; the collimation system is a collimating lens or a fiber collimator.

4. The laser gas telemetry system based on remote computing and control according to claim 2 or 3, characterized in that: The photoelectric conversion module (8) comprises a filter and a photoelectric detector, the filter is arranged between the photoelectric detector and the receiving lens (7), and the photoelectric detector is connected to the data conversion and communication module (4).

5. The laser gas telemetry system based on remote computing and control according to claim 4, characterized in that: The photodetector is a detector or a detector array, and the detector is an InGaAs photodetector, a mercury cadmium telluride detector or a lead selenide detector.

6. The laser gas telemetry system based on remote computing and control according to claim 5, characterized in that: The photodetector comprises a photodiode, which is arranged at the focus of the receiving lens (7), the photodiode is connected to a pre-operational amplifier, the pre-operational amplifier is connected to a secondary amplifier circuit, and the secondary amplifier circuit is connected to a data conversion and communication module (4).

7. The laser gas telemetry system based on remote computing and control according to claim 5 or 6, characterized in that: The data conversion and communication module (4) is connected to the power supply module (6).

8. The laser gas telemetry system based on remote computing and control according to claim 7, characterized in that: The data conversion and communication module (4) includes a data conversion unit and a wireless communication unit; the data conversion unit includes an MCU, an AD conversion chip and a DA conversion chip, the power supply module (6), the display alarm module (5), the AD conversion chip, the DA conversion chip and the wireless communication unit are all connected to the MCU, the wireless communication unit is connected to the remote computing and control module (9), the DA conversion chip is connected to the laser driving module (3), and the AD conversion chip is connected to the secondary amplification circuit of the photoelectric detector of the photoelectric conversion module (8).

9. The laser gas telemetry system based on remote computing and control according to claim 8, characterized in that: The laser drive module (3) comprises a current drive unit and a temperature control unit, wherein the current drive unit is connected to the aiming laser (1) and the semiconductor laser (2) respectively, and the temperature control unit is connected to the semiconductor laser (2); the current drive unit and the temperature control unit are both connected to the DA conversion chip of the data conversion and communication module (4).

10. The laser gas telemetry system based on remote computing and control according to any one of claims 2, 3, 6, 8, and 9, characterized in that: The receiving lens (7) is coated with an anti-reflection film of the measurement band.

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