Rotary umbrella-shaped surface space detection laser gas remote sensing instrument

Abstract

The utility model relates to the technical field of laser gas telemeters, in particular to a rotary umbrella-shaped surface space detection laser gas telemeter. The technical problem is that in the using process of the laser gas remote measuring instrument, due to the fact that only target gas on one laser path can be detected, the area of a potential leakage source is large, or the detection coverage range is insufficient when the position of the leakage source is not known. According to the technical scheme, the rotary umbrella-shaped surface space detection laser gas remote sensing instrument comprises a master control circuit board and a transparent glass protection cover. According to the laser gas telemetering device, the master control circuit board is arranged to supply power to the micro gear motor, the motor shaft of the micro gear motor rotates to drive the rotor of the micro conductive slip ring and the laser gas telemetering device to rotate, and the laser and the horizontal plane form an umbrella-shaped structure due to the included angle alpha; the detection speed of the laser gas telemetering device is high, continuous detection in the rotating process can be achieved, and therefore the device can achieve continuous detection of the umbrella-shaped surface space.

Description

Technical Field

[0001] The utility model relates to the technical field of laser gas telemeters, in particular to a rotary umbrella-shaped surface space detection laser gas telemeter. Background Art

[0002] Laser gas telemetry sensors have been developed in recent years. They use tunable laser diode absorption spectroscopy analysis technology to detect characteristic gas leaks. When the product is working, a laser emitting device emits a laser of a specific wavelength (different central wavelengths for different detected media). After the laser passes through the gas monitoring area, it reaches the reflecting surface and is reflected back to the light receiving device. If the characteristic gas to be detected exists in the gas area through which the laser passes, the laser will be absorbed by the characteristic gas. The higher the concentration of the characteristic gas, the greater the absorption. The laser detector will monitor the changes in laser intensity and feed it back to the control unit for processing, and finally obtain the detected concentration.

[0003] The laser gas telemetry sensor realizes the detection of target gas on a laser route. However, if the area of ​​the potential leakage source is large, or the location of the leakage source is unknown at all and it is necessary to find the leakage source, the detection coverage of a laser route is obviously not enough. At present, the general method is to fix multiple laser gas telemetry sensors or manually hold laser gas telemetry sensors for inspection, which greatly increases the material cost or manpower cost. The present invention can solve the actual application pain points, while having low cost, simple structure and high reliability. Utility Model Content

[0004] In order to overcome the problem that during the use of the laser gas remote detection instrument, the detection coverage is insufficient when the area of ​​the potential leakage source is large or the location of the leakage source is unknown because the target gas can only be detected on one laser route.

[0005] The technical scheme of the utility model is: a rotary umbrella-shaped surface space detection laser gas telemeter, comprising a master control circuit board, a micro reduction motor, a micro conductive slip ring, a laser gas telemetering device, a transmission shaft, an outer shell, and a transparent glass protective cover; the outer side of the master control circuit board is electrically connected with the micro reduction motor; the outer side of the output shaft of the micro reduction motor is installed with a transmission shaft; the outer side of the transmission shaft is installed with a micro conductive slip ring; the upper end of the transmission shaft is installed with a laser gas telemetering device; the outer side of the laser gas telemetering device is installed with an outer shell for protecting and installing the entire device; the outer side of the outer shell is installed with a transparent glass protective cover for protecting the entire device, through which laser can be emitted and diffuse reflected light can also be received and processed.

[0006] Preferably, the master control circuit board supplies power to the micro reduction motor, and the motor shaft of the micro reduction motor rotates, thereby driving the rotor of the micro conductive slip ring and the laser gas telemetry device to rotate. Because of the angle α mentioned above, the laser and the horizontal plane (ground) are in an umbrella-shaped structure, and the detection speed of the laser gas telemetry device is very fast (ms level), which can realize continuous detection during the rotation process. Therefore, the equipment can realize continuous detection of the umbrella-shaped surface space.

[0007] Preferably, the transmission shaft connects the motor shaft of the micro reduction motor, the rotor of the micro conductive slip ring and the laser gas telemetry device as a whole. The motor shaft of the micro reduction motor rotates, so that the transmission shaft can drive the rotor of the micro conductive slip ring and the laser gas telemetry device to rotate.

[0008] Preferably, the body of the micro reduction motor and the stator of the micro conductive slip ring are installed on the outer shell; the power supply and signal lines of the laser gas telemetry device are connected to the rotor connecting line of the micro conductive slip ring, and the outer shell serves as a protective shell and installation shell for the entire device.

[0009] Preferably, the stator connection wires of the micro conductive slip ring and the power wires of the micro reduction motor are connected to the master control circuit board, and the external power supply and control cables (connected to other control or power supply facilities) are connected to the master control circuit board.

[0010] Preferably, the laser gas telemetry device comprises a mounting shell, a telemetry instrument body, a light-collecting lens, a detection semiconductor laser, a semiconductor receiver, a device circuit board and an indicator light laser; a mounting shell having a bottom mounting surface with an inclination angle is installed inside the laser gas telemetry device; the telemetry instrument body is installed inside the mounting shell. Since the bottom mounting surface of the mounting shell of the laser gas telemetry device has an inclination angle, the laser gas telemetry device and the stator surface (horizontal plane) of the micro conductive slip ring form an angle α. Different α angle values ​​can be designed for different application scenarios. When the device is installed vertically (the outer shell 600 is perpendicular to the ground), the larger the α value, the smaller the working radius of the laser, and conversely, the smaller the α value, the larger the working distance of the laser.

[0011] Preferably, a light-collecting lens is installed at the center of the side end inside the telemeter body; a detection semiconductor laser is installed inside the telemeter body close to the light-collecting lens. The detection semiconductor laser emits a detection laser at a certain modulation frequency, and diffuse reflection occurs when the detection laser hits a reflective surface such as the ground.

[0012] Preferably, a semiconductor receiver is installed on the other side of the telemeter body; a device circuit board is electrically connected to the outside of the semiconductor receiver; an indicator light laser is installed on the upper end of the telemeter body near the detection semiconductor laser, and the lasers of the indicator light laser and the detection semiconductor laser are overlapped as much as possible. Because the detection semiconductor laser is generally invisible light, the indicator light laser can clearly detect the irradiation position of the laser, and the diffusely reflected light passes through the transparent glass protective cover and converges onto the photosensitive surface of the semiconductor receiver through the light-collecting lens. The semiconductor receiver converts the optical signal into an electrical signal, which is converted into a concentration signal after analysis and processing by the device circuit board and transmitted. Because the detection speed of the laser gas telemetry device is very fast (ms level), continuous detection can be achieved during the rotation process, so the equipment can achieve continuous monitoring of the umbrella surface space.

[0013] Beneficial effects of the utility model:

[0014] 1. The master control circuit board supplies power to the micro reduction motor, and the motor shaft of the micro reduction motor rotates, thereby driving the rotor of the micro conductive slip ring and the laser gas telemetry device to rotate. Because of the angle α mentioned above, the laser and the horizontal plane (ground) are in an umbrella-shaped structure. The detection speed of the laser gas telemetry device is very fast (ms level), and continuous detection during the rotation process can be achieved. Therefore, the equipment can achieve continuous detection of the umbrella-shaped surface space. Compared with the existing laser gas telemetry sensor, it can achieve target gas detection on a laser route. However, for the potential leakage source with a large area, or the location of the leakage source is not known at all, when it is necessary to find the leakage source, the detection coverage of a laser route is not enough. The laser gas telemetry instrument can greatly improve the detection coverage, with low cost, and can be used on a large scale.

[0015] 2. The master control circuit board supplies power to the micro reduction motor, so that the motor shaft of the micro reduction motor rotates, and then the transmission shaft can drive the rotor of the micro conductive slip ring and the laser gas telemetry device to rotate. Because of the angle α involved above, the laser and the horizontal plane (ground) are in an umbrella-shaped structure;

[0016] 3. The detection semiconductor laser is installed with a certain modulation frequency to emit a detection laser. When the detection laser hits the ground or other reflective surfaces, diffuse reflection occurs. The diffusely reflected light passes through the transparent glass protective cover and converges to the photosensitive surface of the semiconductor receiver through the light-collecting lens. The semiconductor receiver converts the optical signal into an electrical signal, which is converted into a concentration signal after analysis and processing by the device circuit board and transmitted. Because the detection speed of the laser gas telemetry device is very fast (ms level), continuous detection can be achieved during the rotation process. Therefore, the equipment can realize continuous detection of the umbrella-shaped surface space. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Shown is a cross-sectional schematic diagram of the laser gas remote sensing instrument of the present utility model;

[0018] Figure 2 The figure shows a three-dimensional structure diagram of the installation shell of the laser gas remote detector of the utility model;

[0019] Figure 3 Shown is a schematic diagram of the three-dimensional structure of the semiconductor receiver of the laser gas remote detection instrument of the present invention.

[0020] Explanation of the reference numerals: 100, master control circuit board; 200, micro reduction motor; 300, micro conductive slip ring; 400, laser gas telemetry device; 500, transmission shaft; 600, outer shell; 700, transparent glass protective cover; 401, mounting shell; 402, telemeter body; 403, light collecting lens; 404, detection semiconductor laser; 405, semiconductor receiver; 406, device circuit board; 407, indicator light laser. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] See also Figure 1The utility model provides an embodiment: a rotary umbrella-shaped surface space detection laser gas telemeter, comprising a master control circuit board 100, a micro reduction motor 200, a micro conductive slip ring 300, a laser gas telemeter 400, a transmission shaft 500, an outer shell 600, and a transparent glass protective cover 700; the outer side of the master control circuit board 100 is electrically connected to the micro reduction motor 200; the outer side of the output shaft of the micro reduction motor 200 is installed with a transmission shaft 500; the outer side of the transmission shaft 500 is installed with a micro conductive slip ring 300; the upper end of the transmission shaft 500 is installed with a laser gas telemeter 400; an outer shell 600 for protecting and installing the entire device is installed on the outside of the laser gas telemetry device 400; a transparent glass protective cover 700 for protecting the entire device is installed on the outside of the outer shell 600, and the laser can be emitted and the diffuse reflected light can also be received and processed. The main control circuit board (100) supplies power to the micro-reduction motor (200), and the motor shaft of the micro-reduction motor (200) rotates, thereby driving the rotor of the micro-conductive slip ring (300) and the laser gas telemetry device (400) to rotate, because the angle α involved above The reason is that the laser and the horizontal plane (ground) are in an umbrella-shaped structure. The detection speed of the laser gas telemetry device 400 is very fast (ms level), and continuous detection can be achieved during the rotation process. Therefore, the device can achieve continuous detection of the umbrella-shaped surface space. The transmission shaft (500) is connected to the motor shaft of the micro-reduction motor (200) and the rotor of the micro-conductive slip ring (300) and the laser gas telemetry device (400) as a whole. The motor shaft of the micro-reduction motor (200) rotates, so that the transmission shaft (500) can drive the rotor of the micro-conductive slip ring (300) and the laser gas telemetry device (400). The micro reducer motor (200) rotates, and the body of the micro reducer motor (200) and the stator of the micro conductive slip ring (300) are mounted on the outer shell (600); the power supply and signal lines of the laser gas telemetry device (400) are connected to the rotor connection line of the micro conductive slip ring (300); the outer shell (600) serves as a protective shell and a mounting shell for the entire device; the stator connection line of the micro conductive slip ring (300) and the power supply line of the micro reducer motor (200) are connected to the main control circuit board (100); and the external power supply and control cables (connected to other control or power supply facilities) are connected to the main control circuit board (100).

[0023] See also Figure 2-3In this embodiment, the laser gas remote sensing device (400) includes a mounting shell (401), a remote sensing instrument body (402), a light-collecting lens (403), a detection semiconductor laser (404), a semiconductor receiver (405), a device circuit board (406) and an indicator light laser (407); the laser gas remote sensing device (400) is internally mounted with a mounting shell (401) whose bottom mounting surface is provided with an inclined angle; the remote sensing instrument body (402) is installed inside the mounting shell (401); due to the bottom of the mounting shell (401) of the laser gas remote sensing device (400), the mounting shell (401) of the laser gas remote sensing device (400) is provided with an inclined angle. The mounting surface has an inclined angle, so that the laser gas telemetry device (400) and the stator surface (horizontal plane) of the micro conductive slip ring (300) form an angle α. Different α angle values ​​can be designed for different application scenarios. When the device is installed vertically (the outer shell (600) is perpendicular to the ground), the larger the α value, the smaller the working radius of the laser, and vice versa, the smaller the α value, the larger the working distance of the laser. A light receiving lens (403) is installed at the center of the side end of the telemeter body (402); a detection semiconductor laser (404) is installed on the side of the telemeter body (402) close to the light receiving lens (403). The detection semiconductor laser (404) is installed with a certain modulation frequency to emit a detection laser. When the detection laser hits a reflective surface such as the ground, diffuse reflection occurs. A semiconductor receiver (405) is installed on the other side of the telemeter body (402); the outer side of the semiconductor receiver (405) is electrically connected to a device circuit board (406); an indicator light laser (407) is installed near the upper end of the detection semiconductor laser (404) inside the telemeter body (402). The lasers of the indicator light laser (407) and the detection semiconductor laser (404) are overlapped as much as possible, because the detection semiconductor laser The device (404) is generally invisible light, and the indicator light laser (407) can clearly detect the irradiation position of the laser. The diffuse reflected light passes through the transparent glass protective cover (700) and is focused on the photosensitive surface of the semiconductor receiver (405) through the light-collecting lens (403). The semiconductor receiver (405) converts the optical signal into an electrical signal, which is converted into a concentration signal after analysis and processing by the device circuit board (406) and transmitted. Because the detection speed of the laser gas telemetry device (400) is very fast (ms level), continuous detection can be achieved during the rotation process, so the device can achieve continuous monitoring of the umbrella surface space.

[0024] When working, the master control circuit board (100) supplies power to the micro reduction motor (200), so that the motor shaft of the micro reduction motor (200) rotates, and then the transmission shaft (500) can drive the rotor of the micro conductive slip ring (300) and the laser gas telemetry device (400) to rotate. Due to the angle α mentioned above, the laser and the horizontal plane (ground) are in an umbrella-shaped structure;

[0025] Then, the detection semiconductor laser (404) is installed with a certain modulation frequency to emit a detection laser. When the detection laser hits the ground or other reflective surfaces, diffuse reflection occurs. The diffusely reflected light passes through the transparent glass protective cover (700) and is focused on the photosensitive surface of the semiconductor receiver (405) through the light-collecting lens (403). The semiconductor receiver (405) converts the optical signal into an electrical signal, which is converted into a concentration signal after analysis and processing by the device circuit board (406) and transmitted. Because the detection speed of the laser gas telemetry device (400) is very fast (ms level), continuous detection can be achieved during the rotation process, so the device can achieve continuous detection of the umbrella-shaped surface space.

[0026] Through the above steps, the master control circuit board (100) is provided to supply power to the micro reduction motor (200), and the motor shaft of the micro reduction motor (200) rotates, thereby driving the rotor of the micro conductive slip ring (300) and the laser gas telemetry device (400) to rotate. Due to the angle α mentioned above, the laser and the horizontal plane (ground) are in an umbrella-shaped structure, and the detection speed of the laser gas telemetry device 400 is very fast (ms level), and continuous detection during the rotation process can be achieved. Therefore, the device can achieve continuous detection of the umbrella-shaped surface space, so as to solve the problem that during the use of the laser gas telemetry instrument, because only the target gas on one laser route can be detected, the detection coverage is insufficient when the area of ​​the potential leakage source is large or the location of the leakage source is unknown.

[0027] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A rotary umbrella-shaped surface space detection laser gas remote detector, comprising a master control circuit board (100); characterized in that: The invention also comprises a micro reduction motor (200), a micro conductive slip ring (300), a laser gas telemetry device (400), a transmission shaft (500), an outer shell (600), and a transparent glass protective cover (700); the outer side of the master control circuit board (100) is electrically connected to the micro reduction motor (200); the outer side of the output shaft of the micro reduction motor (200) is equipped with a transmission shaft (500); the outer side of the transmission shaft (500) is equipped with a micro conductive slip ring (300); the upper end of the transmission shaft (500) is equipped with a laser gas telemetry device (400); the outer side of the laser gas telemetry device (400) is equipped with an outer shell (600) for protecting and installing the entire device; and the outer side of the outer shell (600) is equipped with a transparent glass protective cover (700) for protecting the entire device and through which laser light can be emitted and diffuse reflected light can be received and processed.

2. The rotary umbrella-shaped surface space detection laser gas remote sensing instrument according to claim 1 is characterized in that: The transmission shaft (500) is connected to the motor shaft of the micro reduction motor (200), the rotor of the micro conductive slip ring (300), and the laser gas telemetry device (400) as a whole.

3. The rotary umbrella-shaped surface space detection laser gas remote sensing instrument according to claim 1 is characterized in that: The body of the micro reduction motor (200) and the stator of the micro conductive slip ring (300) are mounted on an outer shell (600); the power supply and signal lines of the laser gas telemetry device (400) are connected to the rotor connection line of the micro conductive slip ring (300).

4. The rotary umbrella-shaped surface space detection laser gas remote sensing instrument according to claim 1 is characterized in that: The stator connection line of the micro conductive slip ring (300) and the power line of the micro reduction motor (200) are connected to the master control circuit board (100).

5. The rotary umbrella-shaped surface space detection laser gas remote sensing instrument according to claim 1 is characterized in that: The laser gas remote sensing device (400) comprises a mounting shell (401), a remote sensing instrument body (402), a light collecting lens (403), a detection semiconductor laser (404), a semiconductor receiver (405), a device circuit board (406) and an indicator light laser (407); a mounting shell (401) having a bottom mounting surface provided with an inclined angle is mounted inside the laser gas remote sensing device (400); and the remote sensing instrument body (402) is mounted inside the mounting shell (401).

6. The rotary umbrella-shaped surface space detection laser gas remote sensing instrument according to claim 5 is characterized in that: A light-collecting lens (403) is installed at the center of the inner side end of the telemeter body (402); and a detection semiconductor laser (404) is installed at one side of the inner side of the telemeter body (402) close to the light-collecting lens (403).

7. The rotary umbrella-shaped surface space detection laser gas remote sensing instrument according to claim 6 is characterized by: A semiconductor receiver (405) is installed on the other side of the telemeter body (402); the outer side of the semiconductor receiver (405) is electrically connected to a device circuit board (406); and an indicator light laser (407) is installed inside the telemeter body (402) near the upper end of the detection semiconductor laser (404).

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