Laser gas telemetering imaging device and method

Abstract

The invention discloses a laser gas telemetering imaging device and method. Comprising a first cradle head which is provided with a first cantilever and a second cantilever which are oppositely arranged; the visible light camera is arranged at the free end of the first cantilever; the second holder is arranged at the free end of the second cantilever; and the tunable semiconductor laser gas detector is arranged on the second holder. The beneficial effect of the invention is that the telemetering imaging of toxic and harmful gas leakage is realized based on the tunable semiconductor laser active telemetering technology and the image fusion technology.

Description

Technical Field

[0001] This invention relates to the field of petrochemical technology, and in particular to a laser gas telemetry imaging device and method. Background Technology

[0002] In industries such as petrochemicals, gas, industrial fire protection, and metallurgy, there are storage and transportation processes for various toxic and harmful gases such as methane, carbon monoxide, and benzene. Leaks of these gases can cause serious personal accidents or property damage, making online monitoring and early warning of leaks particularly important.

[0003] Especially in industrial sites and workplaces, leaks of toxic and harmful gases can pose a threat to human life. These gases may be colorless and odorless, and their diffusion and concentration distribution after a leak involves a complex mathematical model incorporating parameters such as temperature, pressure, altitude, and humidity. Current technologies cannot comprehensively monitor this, posing significant challenges to emergency evacuation and rescue routes. Therefore, it is essential to design a device and method that can achieve non-contact remote sensing imaging and rapidly scan the gas distribution in a leak area over a large area. Laser gas remote sensing technology is currently an important tool, offering advantages such as low drift, low maintenance costs, and immunity to water vapor interference. However, current technologies are primarily used for line detection and monitoring. Infrared spectral remote sensing technology is an important monitoring method for achieving surface imaging of toxic and harmful gases, but it is susceptible to interference from atmospheric water, carbon dioxide, and other gases. Furthermore, as a passive detection method without an active light source, it suffers from low signal strength, high signal-to-noise ratio, and high maintenance costs.

[0004] In view of this, it is necessary to design a method and device for laser gas telemetry imaging to overcome the above-mentioned defects. Summary of the Invention

[0005] The purpose of this invention is to provide a laser gas telemetry imaging device, which realizes telemetry imaging of toxic and harmful gas leaks based on tunable semiconductor laser active telemetry technology and image fusion technology.

[0006] The purpose of this invention is to provide a laser gas telemetry imaging method, which realizes telemetry imaging of toxic and harmful gas leaks based on tunable semiconductor laser active telemetry technology and image fusion technology.

[0007] To achieve the above objectives, the present invention adopts the following technical solution, including: The first gimbal has a first cantilever and a second cantilever that are positioned opposite to each other. A visible light camera is mounted at the free end of the first cantilever. The second gimbal is located at the free end of the second cantilever. A tunable semiconductor laser gas detector is mounted on the second pan-tilt unit.

[0008] Preferably, the first gimbal has two degrees of freedom, with a horizontal rotation angle of 0~360° and a vertical rotation angle of -90°~+90°; the second gimbal has two degrees of freedom, with a horizontal rotation angle of 0~360° and a vertical rotation angle of -90°~+90°.

[0009] A laser gas telemetry imaging method, using any one of the laser gas telemetry imaging devices described above, is characterized by comprising the following steps: S1. Install the laser gas telemetry imaging device; S2. Adjust to the monitoring position and acquire the environmental image of the monitoring position; S3. Set the scanning range of the tunable semiconductor laser gas detector; S4. Control the tunable semiconductor laser gas detector to perform point scanning through the second pan-tilt unit, and measure and calculate the concentration value of each point; S5. Assign a color value to each point according to the set range of concentration values, and fuse the point with the visible light image at the same time. S6: Quickly scan all points in the set area to form a diffusion cloud map.

[0010] Preferably, step S1 includes the following steps: S101. Place the visible light camera and the second gimbal on the free ends of the first cantilever and the second cantilever of the first gimbal, respectively. S102. Place the tunable semiconductor laser gas detector on the second gimbal. S103. Focus the visible light camera and the tunable semiconductor laser gas detector.

[0011] Preferably, step S2 includes the following steps: S201. Rotate and adjust the visible light camera to the required monitoring angle using the first pan-tilt unit; S202, then obtain environmental images of the location to be monitored using a visible light camera.

[0012] Preferably, step S3 includes the following steps: S301. Set the scanning range of the laser gas detector; S302, Make the scanning range of the laser gas detector within the visible light window range.

[0013] Preferably, step S4 includes the following steps: S401, Point scanning is performed by rotating the second gimbal; S402. Maintain the coaxiality of the visible light camera and the tunable semiconductor laser gas detector during the scanning process.

[0014] Preferably, step S5 includes the following steps: S501. The concentration value at each scan point is the integral concentration, in units of ppm·m or LEL·m. S502. Assign a color value to each scan point based on its concentration; the higher the concentration, the darker the color. S503. The scan points are fused with the corresponding pixels in the visible light image to form a heat map.

[0015] Preferably, step S6 includes the following steps: S601: Scan all scan points in the set area to obtain multiple heat maps; S602. Merge multiple heat maps into a gas diffusion cloud map.

[0016] The beneficial effects of this invention are: it enables remote imaging of toxic and harmful gas leaks based on tunable semiconductor laser active telemetry technology and image fusion technology. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a laser gas telemetry imaging device according to the present invention.

[0018] Figure 2 This is a flowchart of a laser gas telemetry imaging method according to the present invention. Detailed Implementation

[0019] The invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0020] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0021] like Figure 1 As shown, a laser gas telemetry imaging device of the present invention includes: The first gimbal 110 is provided with a first cantilever 111 and a second cantilever 112 that are arranged opposite to each other; A visible light camera 120 is mounted at the free end of the first cantilever 111; The second gimbal 130 is disposed at the free end of the second cantilever 112; A tunable semiconductor laser gas detector 140 is mounted on the second gimbal 130.

[0022] In another embodiment, the first gimbal 110 has two degrees of freedom, with a horizontal rotation angle of 0~360° and a vertical rotation angle of -90°~+90°; the second gimbal 130 has two degrees of freedom, with a horizontal rotation angle of 0~360° and a vertical rotation angle of -90°~+90°.

[0023] Example like Figure 2 As shown, a laser gas telemetry imaging method, using any one of the laser gas telemetry imaging devices described above, includes the following steps: S1. Install the laser gas telemetry imaging device.

[0024] Step S1 includes the following steps: S101. Place the visible light camera 120 and the second gimbal 130 on the free ends of the first cantilever 111 and the second cantilever 112 of the first gimbal 110, respectively. S102. Place the tunable semiconductor laser gas detector 140 on the second gimbal 130; S103. Focus the visible light camera 120 and the tunable semiconductor laser gas detector 140.

[0025] S2. Adjust to the monitoring position and acquire the environmental image of the monitoring position.

[0026] Step S2 includes the following steps: S201. The visible light camera 120 is rotated and adjusted to the angle position to be monitored by the first gimbal 110. S202, and then obtain the environmental image of the location to be monitored through the visible light camera 120.

[0027] S3. Set the scanning range of the tunable semiconductor laser gas detector 140.

[0028] Step S3 includes the following steps: S301. Set the scanning range of the laser gas detector 140; S302, Make the scanning range of the laser gas detector 140 within the visible light window range.

[0029] S4. The tunable semiconductor laser gas detector 140 is controlled by the second gimbal 130 to perform point scanning and to measure and calculate the concentration value of each point.

[0030] Step S4 includes the following steps: S401. Point scanning is performed by rotating the second gimbal 130, and the number of scanning points is 2n; S402. Maintain the coaxiality of the visible light camera 120 and the tunable semiconductor laser gas detector 140 during the scanning process.

[0031] S5. Assign a color value to each point according to the set range of concentration values, and fuse the point with the visible light image at the same time.

[0032] S501. The concentration value at each scan point is the integral concentration, in units of ppm·m or LEL·m. S502. Assign a color value to each scan point based on its concentration; the higher the concentration, the darker the color. S503. The scan points are fused with the corresponding pixels in the visible light image to form a heat map.

[0033] S6: Quickly scan all points in the set area to form a diffusion cloud map.

[0034] Step S6 includes the following steps: S601: Scan all scan points in the set area to obtain multiple heat maps; S602. Merge multiple heat maps into a gas diffusion cloud map.

[0035] In summary, the present invention provides a laser gas telemetry imaging device and method, which realizes telemetry imaging of toxic and harmful gas leaks based on tunable semiconductor laser active telemetry technology and image fusion technology.

[0036] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A laser gas remote imaging apparatus, characterized by, The application relates to a laser gas remote imaging device. The device comprises: A first holder with a first cantilever and a second cantilever arranged oppositely; A visible light camera arranged at the free end of the first cantilever; A second holder arranged at the free end of the second cantilever; 2. The laser gas remote imaging apparatus of claim 1, wherein: A tunable semiconductor laser gas detector arranged on the second holder.

3. A method of laser gas remote sensing imaging, using the laser gas remote sensing imaging apparatus according to any one of claims 1-2, characterized in that, The first holder has two degrees of freedom, with a horizontal rotation angle of 0-360 degrees and a vertical rotation angle of -90 degrees to +90 degrees; the second holder has two degrees of freedom, with a horizontal rotation angle of 0-360 degrees and a vertical rotation angle of -90 degrees to +90 degrees. The application also discloses a method for using the device. The method comprises the following steps: S1, installing the laser gas remote imaging device; S2, adjusting to a monitoring position to obtain an environmental image of the monitoring position; S3, setting a scanning range of the tunable semiconductor laser gas detector; S4, controlling the tunable semiconductor laser gas detector to perform point scanning through the second holder and measuring and calculating the concentration value of each point; 4. The method of claim 3, wherein, S5, assigning a color to each point according to the set range of the concentration value, and fusing the point with a visible light image at the same time; S6, quickly scanning all points in the set range to form a diffusion cloud picture. Step S1 comprises the following steps: S101, placing the visible light camera and the second holder on the free ends of the first cantilever and the second cantilever of the first holder respectively; 5. The method of claim 4, wherein, S102, placing the tunable semiconductor laser gas detector on the second holder; S103, focusing the visible light camera and the tunable semiconductor laser gas detector. Step S2 comprises the following steps:

6. The method of claim 4, wherein, S201, rotating and adjusting the visible light camera to the angle position required for monitoring through the first holder; S202, obtaining the environmental image of the monitoring position through the visible light camera. Step S3 comprises the following steps:

7. The method of claim 4, wherein, S301, setting the scanning range of the laser gas detector; S302, making the scanning range of the laser gas detector within the visible light window range. Step S4 comprises the following steps:

8. The method of claim 4, wherein, S401, performing point scanning through the rotation of the second holder; S402, maintaining the coaxiality of the visible light camera and the tunable semiconductor laser gas detector during the scanning process. Step S5 comprises the following steps: S501, the concentration value of each scanning point is an integral concentration, with a unit of ppm.m or LEL.m; 9. The method of claim 4, wherein, S502, assigning a color to each scanning point according to the concentration value, with a greater concentration value corresponding to a darker color; S503, fusing the scanning point with a pixel point corresponding to the visible light image to form a heat map. Step S6 comprises the following steps: S601, scanning all scanning points in the set range to obtain multiple heat maps; S602, fusing the multiple heat maps into a gas diffusion cloud picture.

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