CN215415016U - Laser gas quick telemetering device - Google Patents
Laser gas quick telemetering device Download PDFInfo
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- CN215415016U CN215415016U CN202022054389.1U CN202022054389U CN215415016U CN 215415016 U CN215415016 U CN 215415016U CN 202022054389 U CN202022054389 U CN 202022054389U CN 215415016 U CN215415016 U CN 215415016U
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Abstract
The utility model provides a laser gas rapid remote measuring device which comprises a laser gas telemeter, wherein a laser output port of the laser gas telemeter is detachably provided with a beam shaping accessory, and the beam shaping accessory is used for shaping point-type laser emitted by the laser gas telemeter into linear laser or surface-type laser. The beam shaping accessory is a cylindrical mirror or a Powell prism or two cylindrical mirrors which are vertically arranged, and can also be an MEMS micro-vibrating mirror and a vibrating mirror controller, point-type laser generates linear laser or surface-type laser through the scanning of the MEMS micro-vibrating mirror, and the vibrating mirror controller controls the scanning and the vibration of the MEMS micro-vibrating mirror in real time; the laser gas rapid remote measuring device can meet the requirement of long detection distance, can dynamically install corresponding beam shaping accessories according to the use scene, realizes rapid scanning of gas leakage points, and cannot miss measurement.
Description
Technical Field
The utility model relates to the field of laser gas remote measurement, in particular to a laser gas rapid remote measurement device.
Background
With the rapid development of national economy, the detection of industrial field safety production is increasingly strengthened, such as coal production, natural gas exploitation, circulation, storage and the like. In these situations, flammable and explosive gases and toxic gases may be present, which may cause great risks to the production safety and the environment. Therefore, these applications place higher demands on the detection of dangerous gases which are inflammable, explosive, toxic and harmful.
At present, some places begin to use laser gas telemeters for routing inspection, and in order to reach farther measurement distance, light spots of the laser telemeters used at present are all in a dot shape. However, because the spot-type light spot is small, only gas on a scanning path of the spot-type light spot can be detected during inspection, the inspection efficiency is low, and meanwhile, the condition of missing inspection is easy to occur.
In order to solve the above problems, people are always seeking an ideal technical solution.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art, and provides a laser gas quick telemetering device capable of quickly detecting gas.
In order to achieve the purpose, the utility model adopts the technical scheme that: the utility model provides a gaseous quick telemetering device of laser, includes the gaseous telemeter of laser, the laser delivery outlet demountable installation of the gaseous telemeter of laser has beam shaping annex, beam shaping annex is used for with the point type laser shaping line type laser or the face type laser of the gaseous telemeter transmission of laser.
Based on the above, the beam shaping accessory is a cylindrical mirror or a powell prism.
Based on the above, the beam shaping accessory is a cylindrical mirror with two surfaces vertically arranged.
Based on the above, the beam shaping accessory comprises an MEMS micro-vibration mirror and a vibration mirror controller, the point type laser generates linear laser through the scanning of the MEMS micro-vibration mirror, and the vibration mirror controller controls the MEMS micro-vibration mirror in real time to realize laser scanning.
Based on the above, the beam shaping accessory further comprises an MEMS micro-vibration mirror and a vibration mirror controller, the point-type laser can be changed into a linear laser after passing through the cylindrical mirror or the Baville prism, the linear laser generates a surface-type laser through the scanning of the MEMS micro-vibration mirror, and the vibration mirror controller controls the MEMS micro-vibration mirror in real time to realize laser scanning.
Based on the above, the laser gas telemeter comprises a laser controller, a laser emitter, a collimating lens, a light receiving unit, a photoelectric detector, a signal analysis processing unit and a power module for supplying power to the whole device;
the laser transmitter is used for emitting laser;
the laser controller is used for controlling the wavelength of the laser emitted by the laser emitter;
the collimating lens is arranged between the laser transmitter and the beam shaping accessory and is used for collimating the laser emitted by the laser transmitting unit into parallel light and then sending the parallel light into the beam shaping accessory;
the light receiving unit is used for converging the laser absorbed by the gas to be detected to the photoelectric detector;
the photoelectric detector is used for converting the reflected laser signal into an electric signal;
and the signal analysis processing unit is used for receiving the electric signal, processing and calculating the electric signal to obtain the concentration of the leaked gas.
Based on the above, the light receiving unit includes a first receiving lens and a second receiving lens, where the first receiving lens is a plano-convex lens, a biconvex lens, a fresnel lens, or an aspheric lens, and is configured to converge the laser light after being diffusely reflected by the reflecting surface to the second receiving lens; the second receiving lens is a cylindrical lens and is used for shaping the laser converged by the first receiving lens into point-shaped light spots.
Based on the above, the laser transmitter includes a measuring laser and an aiming laser, the measuring laser uses a semiconductor laser diode with a wavelength at a characteristic absorption peak of a measured gas and is used for transmitting measuring laser, and the aiming laser is a visible red laser or a visible green laser and is used for transmitting aiming laser.
Based on the above, the measuring laser and the aiming laser are vertically arranged, wherein the measuring laser is located at the center of the first receiving lens, and the aiming laser is located in the middle of the top of the first receiving lens.
Based on the above, the measuring laser and the aiming laser are fixed on two sides of the top of the first receiving lens in parallel.
Compared with the prior art, the laser gas remote detection device has substantial characteristics and progress, particularly, the laser gas remote detection device can conveniently switch the laser detection light beam among point-type light beams, linear light beams and surface-type light beams through the additional light beam shaping accessory, can meet the requirement of long detection distance, can solve the problems that laser spots are small and gas leakage points are not easy to scan by laser gas remote detection equipment during the conventional rapid inspection, is convenient to use, efficient and rapid in detection, cannot miss detection, and is suitable for various application scenes.
Drawings
Fig. 1 is a schematic diagram of the optical path structure of the present invention.
Fig. 2 is a schematic structural diagram of a beam shaping accessory according to embodiment 3 of the present invention.
Fig. 3 is a schematic structural diagram of a beam shaping accessory according to embodiment 4 of the present invention.
In the figure, 1. measuring laser; 2. a laser for aiming; 3. a first receiving lens; 4. a second receiving lens; 5. a photodetector; 6. a signal analysis processing unit; 7. a laser controller; 8. detecting laser spots; 9. a beam shaping accessory; 10. aiming a laser spot; 11. a power supply module; 12, MEMS micro-vibrating mirror; 13. a galvanometer controller; 14. cylindrical mirrors or powell prisms.
Detailed Description
The technical solution of the present invention is further described in detail by the following embodiments.
Example 1
The embodiment provides a laser gas quick telemetering device, as shown in fig. 1, which comprises a laser gas telemetering instrument, wherein a laser output port of the laser gas telemetering instrument is detachably provided with a beam shaping accessory, and the beam shaping accessory is used for shaping point-type laser emitted by the laser gas telemetering instrument into line-type laser or surface-type laser.
Specifically, the laser gas telemeter comprises a laser controller 7, a laser emitter, a collimating lens, a light receiving unit, a photoelectric detector 5, a signal analysis processing unit 6 and a power module 11 for supplying power to the whole device.
And the laser controller 7 is used for controlling the wavelength of the laser emitted by the laser emitter.
The laser transmitter is used for emitting laser; specifically, the laser transmitter comprises a measuring laser 1 and a aiming laser 2, wherein the measuring laser 1 is a semiconductor laser diode and is used for transmitting measuring laser with the wavelength at the characteristic absorption peak of the measured gas under the control of the laser controller 7; the aiming laser 2 is a visible red laser or a visible green laser, and is used for emitting aiming laser.
The collimating lens is arranged between the laser emitter and the beam shaping accessory 9 and is used for collimating the laser emitted by the laser emitting unit into parallel light and then sending the parallel light into the beam shaping accessory 9;
in particular, the beam shaping attachment 9 is installed behind the collimating lens by means of threads, insertion and the like, and point-type laser light emitted by the measuring laser 1 and the aiming laser 2 is changed into linear laser light after passing through the beam shaping attachment 9; in particular, the beam shaping accessory 9 is a cylindrical mirror or a powell prism 14, and the width adjustment of the linear light spot can be realized by changing the focal length of the cylindrical mirror or the angle of the powell prism.
The light receiving unit is used for reflecting the laser absorbed by the gas to be detected to the photoelectric detector 5; specifically, the light receiving unit includes a first receiving lens 3 and a second receiving lens 4, where the first receiving lens 3 is a plano-convex lens, a biconvex lens, a fresnel lens, or an aspheric lens, and is configured to converge laser light after being diffusely reflected by a reflecting surface to the second receiving lens 4; the second receiving lens 4 is a cylindrical lens and is configured to shape the laser light converged by the first receiving lens 3 into a spot-shaped light spot.
The photoelectric detector 5 is used for converting the reflected laser signal into an electric signal; preferably, the photoelectric detector uses an InGaAs detector with precision, high sensitivity and low noise.
And the signal analysis and processing unit 6 is used for receiving the electric signal, processing and calculating the electric signal to obtain the concentration of the leaked gas.
In a specific setting, the measuring laser 1 and the aiming laser 2 are vertically arranged, wherein the measuring laser 1 is positioned at the center of the first receiving lens 3, and the aiming laser 2 is positioned in the middle of the top of the first receiving lens 1, so that the detection laser spot 8 is the same as and parallel to the aiming laser spot 10. For a clearer indication of the measurement position, the measurement laser 1 and the sighting laser 2 are fixed parallel to each other on both sides of the top of the first receiving lens 3, so that the detection laser spot 8 and the sighting laser spot 10 can coincide.
The detection principle of the utility model is as follows:
the measuring laser 1 uses a semiconductor laser diode with the wavelength at the characteristic absorption peak of the measured gas, and the aiming laser 2 is a visible red laser or a visible green laser. The measuring laser 1 modulates output light into alternating light that changes according to a certain rule (sine wave, oblique wave, etc.) by using a modulation technique for the output light intensity and wavelength of a laser diode.
The laser controller modulates the direct current component of the ramp current, so that the light-emitting center wavelength of the laser diode light source can be just aligned to the characteristic absorption peak of the gas to be detected. And the alternating current component of the ramp current is modulated, so that the wavelength scanning range of the light emitted by the laser diode light source just covers the characteristic absorption peak of the gas. In particular, the measuring laser 1 may be of different wavelength bands for detecting different gases, including methane, hydrogen sulfide, ammonia, CO, etc., and the detection of different gases may be realized by replacing different lasers.
The signal analysis processing unit 6 comprises a DSP digital signal processing unit, a DAC conversion circuit and an ADC conversion circuit; the DAC conversion circuit is connected between the DSP digital signal processing unit and the photoelectric detection unit, receives the electric signal, performs analog-to-digital conversion on the electric signal to obtain a digital signal, and then sends the digital signal to the DSP digital signal processing unit; the ADC conversion circuit is connected between the DSP digital signal processing unit and the laser emission unit and is used for DA converting the received command signal into an analog electric signal and inputting the analog electric signal to the drive circuit of the laser emission unit; and the DSP digital signal processing unit is used for receiving the digital signal and calculating to obtain the concentration of the leaked gas. The DSP digital signal processing unit adopts a DSP chip, and the DAC conversion circuit and the ADC conversion circuit adopt high-speed, high-precision and low-power consumption chips.
Example 2
This embodiment is different from embodiment 1 in that: in a specific setting, the beam shaping accessory 9 may also be a two-sided cylindrical mirror that is vertically arranged, and the point-type laser may be changed into a surface-type laser after passing through the beam shaping accessory 9.
The embodiment is suitable for application scenes with high requirements on environmental safety level, and laser telemetering inspection can be rapidly and comprehensively realized through surface type laser.
Example 3
This embodiment is different from embodiment 1 in that: in specific setting, as shown in fig. 2, the beam shaping accessory 9 is an MEMS micro-galvanometer 12 and a galvanometer controller 13, the point laser generates linear laser by scanning of the MEMS micro-galvanometer 12, and the galvanometer controller 13 controls scanning of the MEMS micro-galvanometer 12 in real time. Preferably, the galvanometer controller 13 and the laser controller 7 are integrated on the same chip.
The embodiment realizes the rapid line scanning of the laser by means of mechanical vibration.
Example 4
This embodiment is different from embodiment 1 in that: in a specific setting, as shown in fig. 3, the beam shaping accessory 9 includes a cylindrical mirror or a powell prism 14, an MEMS micro-oscillating mirror 12, and an oscillating mirror controller 13, the point laser passes through the cylindrical mirror or the powell prism 14 and then becomes a linear laser, the linear laser is scanned by the MEMS micro-oscillating mirror 12 to generate a surface laser, and the oscillating mirror controller 13 controls the scanning of the MEMS micro-oscillating mirror 12 in real time.
This embodiment realizes the quick face scanning of laser through mechanical vibration's mode, is applicable to the application scene that has high requirement to environmental security level, and the realization laser telemetering measurement that can be quick, comprehensive through face type laser patrols and examines.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the utility model or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the utility model as defined by the appended claims.
Claims (10)
1. A laser gas rapid remote measuring device is characterized in that: the laser remote sensing device comprises a laser gas remote sensing instrument, wherein a laser output port of the laser gas remote sensing instrument is detachably provided with a beam shaping accessory, and the beam shaping accessory is used for shaping point type laser emitted by the laser gas remote sensing instrument into linear laser or surface type laser.
2. The laser gas fast telemetry device of claim 1, wherein: the beam shaping accessory is a cylindrical mirror or a Powell prism.
3. The laser gas fast telemetry device of claim 1, wherein: the beam shaping accessory is a cylindrical mirror with two surfaces which are vertically arranged.
4. The laser gas fast telemetry device of claim 1, wherein: the beam shaping accessory comprises an MEMS micro-vibration mirror and a vibration mirror controller, point type laser generates linear laser through the scanning of the MEMS micro-vibration mirror, and the vibration mirror controller controls the MEMS micro-vibration mirror in real time to realize laser scanning.
5. The laser gas fast telemetry device of claim 2, wherein: the beam shaping accessory further comprises an MEMS micro-vibration mirror and a vibration mirror controller, point type laser can be changed into linear laser after passing through the cylindrical mirror or the Baville prism, the linear laser generates surface type laser through the scanning of the MEMS micro-vibration mirror, and the vibration mirror controller controls the MEMS micro-vibration mirror in real time to achieve laser scanning.
6. The laser gas fast telemetry device of any of claims 1-5, wherein: the laser gas telemeter comprises a laser controller, a laser emitter, a collimating lens, a light receiving unit, a photoelectric detector, a signal analysis processing unit and a power supply module for supplying power to the whole device;
the laser transmitter is used for emitting laser;
the laser controller is used for controlling the wavelength of the laser emitted by the laser emitter;
the collimating lens is arranged between the laser transmitter and the beam shaping accessory and is used for collimating the laser emitted by the laser transmitting unit into parallel light and then sending the parallel light into the beam shaping accessory;
the light receiving unit is used for converging the laser absorbed by the gas to be detected to the photoelectric detector;
the photoelectric detector is used for converting the reflected laser signal into an electric signal;
and the signal analysis processing unit is used for receiving the electric signal, processing and calculating the electric signal to obtain the concentration of the leaked gas.
7. The laser gas fast telemetry device of claim 6, wherein: the light receiving unit comprises a first receiving lens and a second receiving lens, wherein the first receiving lens is a plano-convex lens, a biconvex lens, a Fresnel lens or an aspheric lens and is used for converging the laser light after the diffuse reflection of the reflecting surface to the second receiving lens; the second receiving lens is a cylindrical lens and is used for shaping the laser converged by the first receiving lens into point-shaped light spots.
8. The laser gas fast telemetry device of claim 7, wherein: the laser transmitter comprises a measuring laser and an aiming laser, wherein the measuring laser uses a semiconductor laser diode with the wavelength at the characteristic absorption peak of the measured gas and is used for transmitting the measuring laser, and the aiming laser is a visible red laser or a visible green laser and is used for transmitting the aiming laser.
9. The laser gas fast telemetry device of claim 8, wherein: the measuring laser and the aiming laser are vertically arranged, wherein the measuring laser is positioned in the center of the first receiving lens, and the aiming laser is positioned in the middle of the top of the first receiving lens.
10. The laser gas fast telemetry device of claim 8, wherein: the measuring laser and the aiming laser are fixed on two sides of the top of the first receiving lens in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022054389.1U CN215415016U (en) | 2020-09-18 | 2020-09-18 | Laser gas quick telemetering device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022054389.1U CN215415016U (en) | 2020-09-18 | 2020-09-18 | Laser gas quick telemetering device |
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| CN215415016U true CN215415016U (en) | 2022-01-04 |
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| CN202022054389.1U Active CN215415016U (en) | 2020-09-18 | 2020-09-18 | Laser gas quick telemetering device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117047130A (en) * | 2023-10-11 | 2023-11-14 | 杭州爱新凯科技有限公司 | Metal 3D printing method with preheating and heat preservation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117047130A (en) * | 2023-10-11 | 2023-11-14 | 杭州爱新凯科技有限公司 | Metal 3D printing method with preheating and heat preservation |
| CN117047130B (en) * | 2023-10-11 | 2024-02-02 | 杭州爱新凯科技有限公司 | Metal 3D printing method with preheating and heat preservation |
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