Intrinsically safe holder scanning type laser gas telemetering device

Abstract

The utility model provides an intrinsically safe holder scanning type laser gas telemetering device, which is used for solving the technical problems of short product service life and incapability of accurately positioning in the prior art. The explosion-proof box comprises a holder, a holder detection bin is arranged on the holder, a laser gas remote measuring instrument and a laser range finder are arranged on the holder detection bin, the laser range finder is connected with the laser gas remote measuring instrument through a flat cable, and the holder and the laser gas remote measuring instrument are respectively connected with a main control module and a power supply of the explosion-proof box through cables. The multi-path separation power supply mode of the utility model substantially improves the intrinsic safety of the system, and can effectively prevent the equipment failure caused by the power supply fault especially when being applied in the flammable and explosive environment. The gas concentration detection is compensated by using the data of the laser range finder, so that the detection result is more accurate, the effect is particularly remarkable in a low-concentration gas environment, and the safety and practicability of the equipment are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of gas detection, especially to an intrinsically safe pan-tilt scanning laser gas remote measuring device. BACKGROUND

[0002] At present, city gas and national pipe network have widely applied explosion-proof pan-tilt scanning laser gas remote meter. However, these devices have some defects that cannot be ignored. First, the weight is large, the installation and maintenance process is very cumbersome, and the product life is severely limited, which brings additional burden to the long-term operation and maintenance of customers. Secondly, the explosion-proof pan-tilt scanning laser gas remote meter lacks laser ranging function, so it cannot accurately locate the leakage point. Therefore, it is urgent to design a light and explosion-proof environment application of intrinsically safe pan-tilt, which is an important technical problem that the current explosion-proof pan-tilt device cannot solve.

[0003] Application No. 202011056360.5 discloses an intrinsically safe scanning optical hydrogen leakage monitoring method, belonging to the technical field of high-pressure hydrogen monitoring. First, a laser source emits light and forms parallel light, and the parallel light irradiates the surface of the hydrogen storage tank. When high-pressure hydrogen in the hydrogen storage tank leaks, the light forms a 132° fan-shaped emission area, which is photographed by a CCD camera and the image of the fan-shaped emission area is recorded. The recorded image is digitally processed, and the position and size of the leakage port are determined according to the processed image. When high-pressure hydrogen does not leak, the parallel light will directly pass through the surface of the measured object, and there is no fan-shaped emission area in the picture taken by the CCD camera. The above monitoring method is simple and convenient, and overcomes the lack of specificity of general sensors. The whole detection method is more secure. However, the above patent does not propose a specific implementation method to realize intrinsic safety, and the optical hydrogen leakage monitoring mentioned in the patent uses the physical phenomenon of refraction and reflectivity of light in different media, which is a known content. UTILITY MODEL CONTENT

[0004] In view of the problems of large product weight, short product life during 24-hour continuous operation, large on-site installation and debugging workload, and high cost in the prior art, the utility model provides an intrinsically safe pan-tilt scanning laser gas remote measuring device, which adopts a multi-path separated power supply mode to fundamentally solve the requirement of intrinsic safety type explosion-proof level for application of the product in flammable and explosive environment, reduce the weight of the product, and increase the service life of the product. In addition, the distance measurement data of the laser range finder is applied to compensate the concentration measurement of the laser gas detector, so as to ensure the detection accuracy in a low-concentration gas environment.

[0005] In order to achieve the above object, the technical scheme of the utility model is as follows: a kind of intrinsically safe type holder scanning laser gas telemeter, including holder, holder is equipped with holder detection bin, laser gas telemeter and laser range finder are equipped on the holder detection bin, laser range finder is connected with laser gas telemeter by wire, holder and laser gas telemeter are connected with the main control module and power supply of explosion-proof box by cable respectively.

[0006] Preferably, the power supply includes a plurality of power supply safety barriers, and the plurality of power supply safety barriers are respectively connected with different control units in the holder detection bin.

[0007] Preferably, the holder detection bin is further provided with a visible light indicating laser I and a visible light indicating laser II, the visible light indicating laser I is designed in an integrated manner with the laser range finder, and the visible light indicating laser II is designed in an integrated manner with the laser gas telemeter; the visible light indicating laser I is connected with the laser range finder by wire, and the visible light indicating laser II is connected with the laser gas telemeter by wire.

[0008] Preferably, the laser gas telemeter is provided with a converging lens on the front side, and the laser gas telemeter is provided with a detection laser emission collimator, the detection laser emission collimator is fixed at the center hole position of the converging lens, and the detection laser emission collimator is parallel to the light beam emitted by the visible light indicating laser II.

[0009] Preferably, the holder detection bin is further provided with a visible light camera, the visible light camera is connected with a power supply safety barrier by a power supply cable, and the visible light camera is connected with the main control module by a network cable; the center line of the video picture of the visible light camera is parallel to the center line of the detection laser emission collimator of the laser gas telemeter.

[0010] Preferably, the holder detection bin is provided with a windshield wiper, the windshield wiper is adapted to the view window of the visible light camera, the laser gas telemeter and the laser range finder respectively, the windshield wiper is connected with a windshield wiper motor, the windshield wiper motor is arranged in the holder detection bin, the windshield wiper motor is connected with a windshield wiper motor control unit, the windshield wiper motor control unit is connected with a power supply safety barrier by a power supply cable, and the windshield wiper motor control unit is connected with the main control module by a signal cable.

[0011] Preferably, the holder includes a holder base, a holder horizontal rotation disc is movably arranged on the holder base, a holder vertical rotation main body is arranged on the holder horizontal rotation disc, and the holder vertical rotation main body is rotationally connected with the holder detection bin.

[0012] Preferably, the gimbal base is provided with a horizontal motor, the horizontal motor is connected with a horizontal motor control unit, the horizontal motor control unit is connected with a power supply safety grid through a power cable, and the horizontal motor control unit is connected with the explosion-proof box through a signal cable.

[0013] Preferably, the horizontal motor control unit, the pitching motor control unit and the wiper motor control unit all comprise an encoding plate, the encoding plate is connected with the horizontal motor, the pitching motor or the wiper motor respectively, the encoding plate is connected with a photoelectric switch, and the photoelectric switch is matched with the horizontal motor, the pitching motor or the wiper motor respectively.

[0014] Preferably, the gimbal base is provided with a cable flange, and the signal cable and the power cable are arranged in the cable flange.

[0015] Compared with the prior art, the multiple-path separation power supply mode solves the problem of the required intrinsic safety type explosion-proof grade of the product in a flammable and explosive environment, reduces the weight of the product, increases the service life of the product, and significantly improves the intrinsic safety of the system.

[0016] 1. Improve the explosion-proof grade: by adopting the intrinsic safety type multiple-path separation power supply scheme, the product meets the Ex ibIIB T4 GB and above explosion-proof requirements.

[0017] 2. Eliminate the measurement distance error: by measuring the distance in real time and using a compensation algorithm, the light signal attenuation caused by the change in distance is effectively eliminated, thereby greatly improving the accuracy of gas concentration measurement.

[0018] 3. Improve the low concentration detection precision: especially in a low concentration gas environment, the compensation algorithm can accurately correct the intensity of the light signal to ensure the detection precision of the gas concentration.

[0019] 4. Intelligent data fusion: by comprehensively processing data from the laser range finder, laser gas remote sensor, realizing video superposition of information such as concentration of leaked gas, azimuth coordinate of the holder, measured distance, etc.; using artificial intelligence technology, combining multi-source information, automatically identifying the leakage mode, filtering out environmental noise, improving the accuracy and reliability of detection. Intelligent data fusion greatly enhances the intelligent level of the device, and realizes efficient detection in complex environment. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0021] Figure 1 It is a structural schematic diagram of the present application.

[0022] Figure 2 It is a principle diagram of multi-path separation of the present application.

[0023] In the figure, 1 is a visible light camera, 2 is a visible light indicating laser I, 3 is a laser range finder, 4 is a laser gas remote sensor, 5 is a holder base, 6 is a windshield wiper, 7 is a holder vertical rotation main body, 8 is a holder detection bin, 9 is a holder horizontal rotation disc, 10 is a cable flange, 11 is a detection laser emission collimator, and 12 is a visible light indicating laser II. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0025] As Figure 1As shown, an intrinsically safe cloud platform scanning type laser gas remote sensing device, including a cloud platform, the cloud platform is a three-dimensional cloud platform which can realize horizontal rotation and vertical pitch rotation. The cloud platform detection bin 8 is arranged on the cloud platform, and the cloud platform detection bin 8 rotates horizontally and vertically under the driving of the cloud platform. The laser gas remote sensor 4 and the laser range finder 3 are arranged on the cloud platform detection bin 8, the detection laser emitter collimator 11 and the visible light laser emitter II 12 are arranged on the laser gas remote sensor 4, and the light beams emitted by the two are parallel. The visible light laser emitter I 2 is arranged on the laser range finder 3, the laser range finder 3 realizes the distance information between the target monitoring area leakage point and the laser gas remote sensor 4, and the laser range finder 3 is fixed on the front panel of the cloud platform detection bin 8 through a screw. The laser gas remote sensor 4 realizes the gas leakage detection of the target monitoring area, and the laser gas remote sensor 4 is fixed on the front panel of the cloud platform detection bin 8 through a screw. The laser gas remote sensor 4 and the laser range finder 3 are designed according to the spatial position of the cloud platform detection bin 8, the visible light indicating laser emitter I is arranged on one side of the laser range finder, and the visible light indicating laser emitter II is arranged on one side of the laser gas remote sensor. The model of the laser gas remote sensor 4 is HW-FRLD200, and the model of the laser range finder 3 is HW-PTFS400. The laser range finder 3 is connected with the laser gas remote sensor 4 through a wire, and the laser gas remote sensor 4 is connected with the main control module BXK1-ZK in the explosion-proof box and the power safety barrier through a cable. The main control module BXK1-ZK realizes the rotation direction control of the cloud platform horizontal rotation disc 9, the cloud platform vertical rotation main body 7 and the windshield 6 of the three-dimensional cloud platform, realizes the detection data superposition of the laser gas remote sensor 4 and the laser range finder 3 to the video picture of the visible light camera 1, realizes the three-dimensional cloud platform direction control, the laser gas remote sensor 4, the laser range finder 3, the visible light camera 1 and the windshield 6 communication signal fusion after conversion into unified network port (or optical fiber) communication.

[0026] The power supply includes a plurality of power safety barriers, and the plurality of power safety barriers are respectively connected with different control units in the cloud platform detection bin 8. Figure 2As shown, the number of power supply cables is reduced or expanded according to the requirement of the intrinsically safe explosion-proof grade. The five power supply safeties are respectively connected with the visible light camera 1, the laser detection unit, the horizontal motor control unit, the pitch motor control unit and the wiper motor control unit through the five power supply cables. The laser detection unit includes the laser gas remote sensor 4 and the laser range finder 3, and the visible light indication laser I 2 on the laser gas remote sensor 4 and the visible light indication laser II 12 on the laser range finder 3. The scheme independently supplies power to the visible light camera unit, the laser detection unit, the horizontal motor control unit, the pitch motor control unit and the wiper motor control unit, reduces the influence of single power failure on the overall system, and enhances the safety of the equipment in the dangerous environment. Especially in the flammable and explosive environment, the intrinsically safe design greatly reduces the risk caused by electrical failure.

[0027] As shown in Figure 1 As shown, the pan-tilt detection bin 8 is also provided with a visible light indication laser I 2 and a visible light indication laser II 12. The visible light indication laser 2 and the laser range finder 3 are integrated, the visible light indication laser I 2 is arranged on one side of the laser range finder 3, the visible light indication laser II 12 and the laser gas remote sensor 4 are integrated, and the visible light indication laser II 12 is arranged on one side of the laser gas remote sensor 4. The laser range finder 3 is connected with the laser gas remote sensor 4 through a wire harness, and the laser gas remote sensor 4 is connected with the main control module and the power supply safety in the explosion-proof box through a cable. The visible light indication laser I 2 needs to be adjusted to be parallel to the visible light indication laser II 12. The visible light indication laser II 12 indicates the leakage point of the target monitoring area in the video picture of the visible light camera 1, and the laser range finder 3 is fixed on the front panel of the pan-tilt detection bin 8 through a screw.

[0028] The gimbal detection bin 8 is also provided with a visible light camera 1. The visible light camera 1 is connected with a power supply safety grid through a power cable, and is connected with the main control module through a signal cable. The main control module receives the concentration information, distance information, gimbal horizontal coordinate and gimbal pitching coordinate of the target monitoring area sent by the laser gas remote sensor 4, the laser range finder 3, the visible light camera 1, the horizontal motor control unit and the pitching motor control unit, and transmits the fused concentration information, distance information, gimbal horizontal coordinate and gimbal pitching coordinate back to the visible light camera unit for video superposition. The visible light camera unit transmits the superposed video back to the main control module. The visible light camera 1 is fixed on the front panel of the gimbal detection bin 8 by screws. When the gimbal detection bin 8 is horizontally arranged, the center line of the video picture of the visible light camera 1 is parallel to the center line of the detection laser emission collimator 11 of the laser gas remote sensor 4. The laser range finder 3 is located between the visible light camera 1 and the laser gas remote sensor 4, so as to reduce the error of the detection point of the laser gas remote sensor 4 in the video picture of the visible light camera 1. The laser range finder 3, the visible light camera 1 and the laser gas remote sensor 4 are located on the same horizontal plane of the front panel of the gimbal detection bin 8.

[0029] The gimbal detection bin 8 is provided with a windshield wiper 6, which is matched with the windows of the visible light camera 1, the laser gas remote sensor 4 and the laser range finder 3 respectively. The windshield wiper 6 cleans the glass windows of the laser range finder 3, the visible light camera 1 and the laser gas remote sensor 4. The end of the windshield wiper 6 is movably arranged on the front panel of the gimbal detection bin 8, and is arranged between the visible light camera 1 and the laser gas remote sensor 4. The windshield wiper 6 is connected with a windshield wiper motor. The windshield wiper motor is arranged in the gimbal detection bin 8, and is connected with a windshield wiper motor control unit. The windshield wiper motor control unit is connected with a power supply safety grid through a different power cable, and is connected with the main control module through a different signal cable. The windshield wiper motor control unit includes an encoder board, which is connected with the windshield wiper motor and an optical switch. The optical switch is matched with the windshield wiper motor, and is integrally fixed on the front panel of the gimbal detection bin 8. The optical switch mainly realizes zero point calibration when the motor rotates, and the encoder board realizes rotation control of the windshield wiper 6.

[0030] As Figure 1As shown, the holder includes holder base 5, holder base 5 is movably provided with holder horizontal rotating disc 9, holder horizontal rotating disc 9 can rotate relative to holder base 5, holder horizontal rotating disc 9 is provided with holder vertical rotating main body 7, holder vertical rotating main body 7 and holder horizontal rotating disc 9 are hard connected, holder vertical rotating main body 7 is rotatably connected with holder detection bin 8. Holder vertical rotating main body 7 drives holder detection bin 8 to pitch relative to holder horizontal rotating disc 9. Holder base 5 drives holder horizontal rotating disc 9 to continuously rotate in horizontal direction 360°, holder base 5 and holder horizontal rotating disc 9 are connected through rotating shaft. Holder horizontal rotating disc 9 drives holder vertical rotating main body 7 and holder detection bin 8 to rotate. Holder vertical rotating main body 7 drives holder detection bin 8 to rotate in vertical direction positive and negative 90°, holder vertical rotating main body 7 and holder detection bin 8 are connected through rotating shaft. Holder detection bin 8 is used for fixing visible light camera 1, laser gas remote tester 4, laser range finder 3 and windshield wiper 6.

[0031] As shown, Figure 2 As shown, holder base 5 is provided with horizontal motor, horizontal motor is connected with horizontal motor control unit, horizontal motor control unit is connected with power supply safety grid through power supply cable, horizontal motor control unit is connected with main control module through signal cable. Horizontal motor control unit includes coding plate, coding plate is connected with horizontal motor, coding plate is connected with photoelectric switch, photoelectric switch is matched with horizontal motor, photoelectric switch and horizontal motor are integrated, photoelectric switch mainly realizes zero point calibration when horizontal motor rotates, coding plate controls horizontal motor to rotate. Holder horizontal rotating disc 9 is provided with pitching motor, pitching motor is fixed on holder vertical rotating main body 7 through fixed structure, pitching motor is connected with pitching motor control unit, pitching motor control unit is connected with power supply safety grid through power supply cable, pitching motor control unit is connected with main control module through signal cable. Pitching motor control unit includes coding plate, coding plate is connected with horizontal motor, coding plate is connected with photoelectric switch, photoelectric switch is matched with horizontal motor, photoelectric switch and pitching motor are integrated, photoelectric switch mainly realizes zero point calibration when pitching motor rotates, coding plate controls pitching motor to rotate.

[0032] Holder base 5 is provided with cable flange 10, signal cable and power supply cable are arranged in cable flange 10, cable flange 10 realizes safe access of power supply cable and signal cable.

[0033] The laser gas remote sensor 4 utilizes the absorption characteristics of specific wavelengths of laser light by gas molecules to detect and quantify gas leaks. When the laser light passes through an area where a gas leak may be present, the gas molecules absorb some of the laser energy, changing the intensity or phase of the laser light. By analyzing these changes, the laser gas remote sensor 4 can precisely locate the leak point and estimate the concentration and leak rate of the gas. The laser gas remote sensor 4 has high sensitivity and accuracy, and can accurately locate the source of the leak in complex environments. At the same time, the utility model integrates the laser range finder 3, which measures the distance data between the target and the laser gas remote sensor 4, and dynamically compensates the gas concentration detection by combining the existing distance concentration compensation algorithm, effectively improving the detection accuracy in low concentration gas environment. This design is particularly suitable for complex industrial environments and can provide more accurate and reliable gas concentration measurement. In this process, the visible light camera 1 and the visible light indicating laser 12 locate the target monitoring area through the video image.

[0034] The main control module receives the concentration information, distance information, gimbal horizontal coordinates and gimbal pitch coordinates of the target monitoring area sent by the laser gas remote sensor 4, the laser range finder 3, the visible light camera 1, the horizontal motor control unit and the pitch motor control unit, and fuses the concentration information, distance information, gimbal horizontal coordinates and gimbal pitch coordinates and returns them to the visible light camera unit for video superposition. The visible light camera unit returns the superimposed video to the main control module.

[0035] On the basis of the multi-path separation power supply mode, more power management schemes can be introduced to further optimize the energy efficiency and safety of the system.

[0036] For the multi-path power supply scheme of the present application, different power management designs are attempted to achieve similar safety effects, and different calculation methods can also be used to achieve the compensation algorithm.

[0037] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An intrinsically safe cloud platform scanning laser gas remote measuring device, comprising a cloud platform, a cloud platform detection bin (8) is arranged on the cloud platform, characterized in that, The gimbal detection bin (8) is provided with a laser gas remote sensor (4) and a laser range finder (3), the laser range finder (3) is connected with the laser gas remote sensor (4), and the gimbal and the laser gas remote sensor (4) are connected with the main control module and the power supply of the explosion-proof box through cables respectively.

2. The intrinsically safe gimballed scanning laser gas telemeter of claim 1, wherein, The power supply in the explosion-proof box comprises a plurality of power supply safety barriers, and the plurality of power supply safety barriers are connected with different control units in the gimbal detection bin (8) through power supply cables respectively.

3. The intrinsically safe gimballed scanning laser gas telemeter of claim 2, wherein, The gimbal detection bin (8) is further provided with a visible light indicating laser I (2) and a visible light indicating laser II (12), the visible light indicating laser I (2) is designed in an integrated manner with the laser range finder (3), and the visible light indicating laser II (12) is designed in an integrated manner with the laser gas remote sensor (4); the visible light indicating laser I (2) is connected with the laser range finder (3) through a wire harness, and the visible light indicating laser II (12) is connected with the laser gas remote sensor (4) through a wire harness.

4. The intrinsically safe gimballed scanning laser gas telemeter of claim 3, wherein, The laser gas remote sensor (4) is provided with a converging lens on the front side, the laser gas remote sensor (4) is provided with a detection laser emission collimator (11), the detection laser emission collimator (11) is fixed at the center hole position of the converging lens, and the detection laser emission collimator (11) is parallel to the light beam emitted by the visible light indicating laser II (12).

5. The intrinsically safe gimballed scanning laser gas telemeter of any of claims 2-4, wherein, The gimbal detection bin (8) is further provided with a visible light camera (1), the visible light camera (1) is connected with a power supply safety barrier through a power supply cable, and the visible light camera (1) is connected with the main control module through a network cable; the center line of the video picture of the visible light camera (1) is parallel to the center line of the detection laser emission collimator (11) of the laser gas remote sensor (4).

6. The intrinsically safe gimballed scanning laser gas telemeter of claim 5, wherein, The gimbal detection bin (8) is provided with a windshield wiper (6), the windshield wiper (6) is adapted to the windows of the visible light camera (1), the laser gas remote sensor (4) and the laser range finder (3) respectively, the windshield wiper (6) is connected with a windshield wiper motor, the windshield wiper motor is arranged in the gimbal detection bin (8), the windshield wiper motor is connected with a windshield wiper motor control unit, the windshield wiper motor control unit is connected with a power supply safety barrier through a power supply cable, and the windshield wiper motor control unit is connected with the main control module through a signal cable.

7. The intrinsically safe gimballed scanning laser gas telemeter of claim 6, wherein, The gimbal comprises a gimbal base (5), the gimbal base (5) is movably provided with a gimbal horizontal rotation disc (9), the gimbal horizontal rotation disc (9) is provided with a gimbal vertical rotation main body (7), and the gimbal vertical rotation main body (7) is rotationally connected with the gimbal detection bin (8).

8. The intrinsically safe gimballed scanning laser gas telemeter of claim 7, wherein, The gimbal base (5) is internally provided with a horizontal motor, the horizontal motor is connected with a horizontal motor control unit, the horizontal motor control unit is connected with a power safety grid through a power cable, and the horizontal motor control unit is connected with the main control module of the explosion-proof box through a signal cable.

9. The intrinsically safe gimballed scanning laser gas telemeter of claim 8, wherein, The horizontal motor control unit, the pitching motor control unit and the wiper motor control unit all comprise an encoding plate, the encoding plate is connected with the horizontal motor, the pitching motor or the wiper motor respectively, the encoding plate is connected with a photoelectric switch, and the photoelectric switch is matched with the horizontal motor, the pitching motor or the wiper motor respectively.

10. The intrinsically safe gimballed scanning laser gas telemeter of any of claims 7-9, wherein, The gimbal base (5) is provided with a cable flange (10), and the signal cable and the power cable are arranged in the cable flange (10).

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