CN212622192U - Novel handheld laser dangerous gas remote measuring system - Google Patents
Novel handheld laser dangerous gas remote measuring system Download PDFInfo
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- CN212622192U CN212622192U CN202021764280.0U CN202021764280U CN212622192U CN 212622192 U CN212622192 U CN 212622192U CN 202021764280 U CN202021764280 U CN 202021764280U CN 212622192 U CN212622192 U CN 212622192U
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Abstract
The utility model provides a novel handheld laser dangerous gas remote measuring system, which comprises a laser, a detector, an optical filter, a Fresnel lens, a collimator, a laser driving unit, a distance measuring module, a photoelectric conversion unit and a processor unit; the input end of the laser is connected with the laser driving unit, the output end of the laser is connected with the collimator, the Fresnel lens is arranged on a light returning path, and the distance measuring module is used for receiving reflected laser to measure the distance; the optical filter is arranged at the focus position of the rear side of the Fresnel lens; the detector is arranged at the rear end of the optical filter; the photoelectric conversion unit is connected to the rear end of the detector; the processor unit is connected with the laser driving unit; the processor unit is connected with the photoelectric conversion unit. The system has the advantages of high efficiency, strong noise resistance, high sensitivity, long measuring distance and convenience in carrying.
Description
Technical Field
The utility model relates to a hazardous gas telemetering measurement field, specific theory has related to a novel handheld laser hazardous gas telemetering measurement system.
Background
With the implementation of the national strategy of transporting gas from west to east and the popularization of natural gas, the running time of the pipeline is gradually prolonged, and the natural gas pipeline leakage events caused by the aging of the pipeline, the corrosion of soil, the stress of stratum, the construction damage and the like are increasing.
On one hand, the safe and stable supply of urban basic energy can be seriously influenced by the leakage of the natural gas pipeline, and the ecological safety of the natural gas leaked into the atmospheric environment is endangered; on the other hand, due to the flammable and explosive characteristics, the natural gas leakage may cause combustion and explosion, seriously threatens the personal safety of common people and causes huge property loss; therefore, the detection of the natural gas leakage is significant.
Common gas detection methods include electrochemical methods, catalytic combustion methods, solid electrolyte methods, infrared spectrum absorption methods and the like.
The basic theory of the infrared spectrum absorption method is based on the Lambert beer law, the method utilizes the characteristic spectrum of specific gas molecules for detection, the resolution ratio is high, the selectivity to different gas molecules is good, the infrared spectrum absorption method generally needs short-distance detection, and the implementation of the technology in the field of remote measurement becomes difficult due to the fact that a gas leakage area of a coal mine or a natural gas pipeline belongs to a dangerous environment and detection personnel are inconvenient to directly contact at a short distance.
In order to solve the above problems, people are always seeking an ideal technical solution.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the not enough of prior art to a novel handheld laser hazardous gas remote sensing system that efficient, anti-noise ability is strong, sensitivity is high, measuring distance is far away, conveniently carry is provided.
In order to realize the purpose, the utility model discloses the technical scheme who adopts is: a novel handheld laser dangerous gas remote measuring system comprises a laser, a detector, an optical filter, a Fresnel lens, a collimator, a laser driving unit, a distance measuring module, a photoelectric conversion unit and a processor unit;
the input end of the laser is connected with a laser driving unit and is used for superposing and synthesizing a scanning signal and a modulation signal;
the output end of the laser is connected with a collimator and used for collimating and emitting laser;
the Fresnel lens is arranged on a light returning path and is used for collecting reflected light;
the distance measurement module is used for receiving the reflected laser to measure the distance;
the optical filter is arranged at the focus position of the rear side of the Fresnel lens and is used for filtering the reflected light;
the detector is arranged at the rear end of the optical filter and used for receiving optical signals;
the photoelectric conversion unit is connected to the rear end of the detector and used for converting the optical signal into an electric signal;
the processor unit is connected with the laser driving unit and is used for adjusting parameters of the driving signal;
the processor unit is connected with the photoelectric conversion unit and used for processing the electric signals and calculating the gas concentration according to the received electric signals.
The processor unit comprises an amplifying and filtering unit, a signal acquisition unit, a signal processing unit, a control unit, a human-computer interface unit, an audible and visual alarm unit and a temperature control unit;
the photoelectric conversion unit comprises an I/V conversion unit for converting current signals collected by the detector into voltage signals;
the amplifying and filtering unit is connected with the I/V conversion unit and is used for amplifying and filtering the electric signals;
the signal acquisition unit is connected with the amplifying and filtering unit and is used for acquiring signals and performing digital-to-analog conversion;
the signal processing unit is connected with the signal acquisition unit and is used for processing the acquired signals;
the temperature control unit is connected with the laser and is used for controlling the temperature of the laser;
the control unit is connected with the signal processing unit and used for adjusting parameters;
the control unit is also connected with the human-computer interface unit and is used for connecting external equipment;
and the sound and light alarm unit is used for triggering an alarm after the concentration exceeds the standard.
Basically, the control unit is connected with the green light indicating unit so as to be lightened when the detection light is received and determine the telemetering area.
The control unit is further connected with the image acquisition unit so as to acquire images of the telemetry area.
Basically, the control unit is connected with the wireless communication unit and used for uploading and downloading data.
The portable battery pack comprises a handheld shell, a battery compartment, a lens cone, a front end cover and a rear end cover, wherein the handheld shell comprises a handheld part, the lens cone, the front end cover and the rear end cover; the front end of the lens cone is embedded with the Fresnel lens, the rear end of the lens cone is sequentially provided with the optical filter and the detector, and the photoelectric conversion unit and the processor unit are integrated on a circuit board and are arranged in the lens cone; the laser and the collimator are arranged at the center of the lens cone and are overlapped with the central line of the Nefel lens, and the green light indicating unit, the distance measuring module and the image acquisition unit are respectively arranged at the front end of the lens cone.
The utility model discloses relative prior art has substantive characteristics and progress, specific theory, the utility model discloses combine together infrared spectrum absorption method and laser telemetering measurement technique, with the help of laser telemetering measurement technique and ranging module, the accurate dangerous gaseous position of revealing of location, then with the help of infrared spectrum absorption method, accurate detection gas concentration.
Further, a green light indicating unit is provided, which is illuminated only when a signal is acquired, to emit green light, so that it can be determined that the telemetry zone is the target zone at a relatively long distance.
Furthermore, set up image acquisition unit, like the camera, mainly used carries out image acquisition to background object, shows on the display screen, tells the accurate place of revealing of user's hazardous gas.
Furthermore, the system is integrated in the handheld device, has higher integration level, is convenient to carry and has small volume.
Drawings
Fig. 1 is the working principle diagram of the novel handheld laser hazardous gas remote measuring system of the utility model.
Fig. 2 is a functional block diagram of the novel handheld laser hazardous gas telemetry system of the present invention.
Fig. 3 is the appearance structure diagram of the novel handheld laser hazardous gas remote measuring system of the utility model.
Fig. 4 is the circuit schematic diagram of the distance measuring module of the novel handheld laser hazardous gas remote measuring system of the utility model.
In the figure: 1. a fresnel lens; 2. a laser; 3. a green light indicating unit; 4. a distance measurement module; 5. an image acquisition module; 6. a display screen; 7. an indicator light; 8. pressing a key; 9. a horn; 11. a rear cover; 13. a front end cover; 14. an optical filter; 15. a detector; 16. a collimator; 17. a hazardous gas bolus; 18. a hand-held portion; 19. a lens barrel.
Detailed Description
The technical solution of the present invention will be described in further detail through the following embodiments.
As shown in fig. 1 and 2, a novel handheld laser hazardous gas remote measuring system comprises a laser 2, a detector 15, a filter 14, a fresnel lens 1, a collimator 16, a laser driving unit, a distance measuring module, a photoelectric conversion unit and a processor unit.
The processor unit is connected with the laser driving unit and used for adjusting parameters of the driving signal, the input end of the laser is connected with the laser driving unit and used for superposing and synthesizing a scanning signal and a modulation signal, wherein the scanning signal is generally a sawtooth wave, a triangular wave or other wave forms slightly changed on the basis, and the modulation signal is generally a sine wave with 5K, 10K or other frequencies.
The output end of the laser is connected with the collimator and used for collimating and emitting laser, the laser is arranged at the center of a Fresnel lens, the Fresnel lens is arranged on a light return path and used for collecting reflected light obtained by diffuse reflection after the laser meets a dangerous gas air mass 17, and the aim is to ensure that the amount of the reflected light is more and the collection is easier.
The distance measurement module is used for receiving the reflected laser to measure the distance, measuring the distance between a target object and equipment and telling a user the accurate leakage position of the dangerous gas.
The circuit principle is shown in fig. 4, wherein C1 and C2 are power supply filter capacitors, U1 is a laser, U7 is a photoelectric signal conversion unit, the model can adopt ADP230-8, U4 is a comparator, the model can adopt LMH6629, U2 is a processor, an FPGA can be selected, U2 controls the output high and low levels of the U4 comparator, further controls the output pulse of the U3 pulse generator to control the pulse turn-off of Q1, PD detects whether the U1 and LD work or not by using a sub-detector, the output signal of U7 is amplified by the U8 operational amplifier, and the signal of U6 enters the U5 timer after being shaped, so that distance measurement is realized.
The optical filter is arranged at the focal position of the rear side of the Fresnel lens and used for filtering the reflected light and filtering other unwanted light.
The detector is arranged at the rear end of the optical filter and used for receiving optical signals, and the photoelectric conversion unit is connected to the rear end of the detector and used for converting the optical signals into electric signals and converting the electric signals into voltage signals by the I/V conversion unit; the amplifying and filtering unit is connected with the I/V conversion unit and is used for amplifying and filtering the voltage signal; the signal acquisition unit is connected with the amplification filtering unit and used for acquiring signals and performing digital-to-analog conversion, and mainly by means of an ADC (analog-to-digital converter).
The signal processing unit is connected with the signal acquisition unit and used for processing acquired signals, related algorithms of the signal processing include phase-locked amplification, wavelet algorithm, fft and other conventional algorithms for data processing, and finally the concentration of the hazardous gas is obtained through calculation.
The temperature control unit is connected with the laser and used for controlling the temperature of the laser, the electromagnetic wave with specific frequency emitted by the laser is influenced by the temperature and the injection current, the temperature influence coefficient is 0.1 nm/degree generally, the current influence coefficient is 0.01nm/mA, and in order to enable the electromagnetic wave emitted by the laser not to be influenced by the temperature, the laser needs to be accurately controlled by the temperature, so that the temperature control module is arranged.
The control unit is connected with the signal processing unit and used for adjusting parameters, controlling parameters of each functional module and maintaining the state of equipment, the control unit is also connected with the storage unit and used for storing data, the display unit is used for displaying the concentration value of the dangerous gas, and the key unit is mainly used for inputting instructions and selecting functional modules.
The control unit is connected with the wireless communication unit and used for uploading and downloading data, is connected with the mobile phone APP or the remote control center and timely acquires the detected data.
In order to improve operability, the control unit is connected with the green light indicating unit so as to be lightened when receiving detection light, determine the telemetering area and inform a user whether the telemetering instrument aims at a target object.
The control unit is connected with the image acquisition unit so as to acquire images of the remote measurement area, and the image acquisition unit adopts a high-multiple camera for photographing the target object and displaying the image on the display screen so that an operator can know the position of the target object.
As shown in fig. 3, for portability, a handheld housing is provided, which is similar to a flashlight in structure, and includes a handheld portion 18, a lens barrel 19, a front end cover 13 and a rear end cover 11, a battery compartment is provided in the handheld portion 18, the lens barrel 19 is connected with the front end of the handheld portion 10, the front end cover 13 is covered on the front end of the lens barrel 19, the rear end cover 11 is covered on the rear end of the battery compartment, the front end of the lens barrel 19 is embedded with the fresnel lens 1, the optical filter and the detector are sequentially installed on the rear end of the interior of the lens barrel 19, and the photoelectric conversion unit and the processor unit are integrated on a circuit board and are placed in the lens barrel 19; the laser 2 and the collimator are arranged at the center of the lens barrel and coincide with the center line of a Nerphil lens, the green light indicating unit 3, the distance measuring module 4 and the image acquisition unit 5 are respectively arranged at the front end of the lens barrel 19, and the display screen 6, the indicator light 7, the key 8 and the loudspeaker 9 are further arranged outside the lens barrel 19.
Through this portable design, improve equipment's utilization efficiency, through combining together laser telemetering technology and infrared spectroscopy technique, solve traditional infrared spectroscopy absorption method and need closely contact dangerous gaseous risk, through setting up green glow indicating unit, range finding module and image acquisition unit, the supplementary accuracy of judging the telemetering measurement to and acquire specific positional information and the image information of target object.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (6)
1. A novel handheld laser hazardous gas remote sensing system which is characterized in that: the device comprises a laser, a detector, an optical filter, a Fresnel lens, a collimator, a laser driving unit, a distance measuring module, a photoelectric conversion unit and a processor unit;
the input end of the laser is connected with a laser driving unit and is used for superposing and synthesizing a scanning signal and a modulation signal;
the output end of the laser is connected with a collimator and used for collimating and emitting laser;
the Fresnel lens is arranged on a light returning path and is used for collecting reflected light;
the distance measurement module is used for receiving the reflected laser to measure the distance;
the optical filter is arranged at the focus position of the rear side of the Fresnel lens and is used for filtering the reflected light;
the detector is arranged at the rear end of the optical filter and used for receiving optical signals;
the photoelectric conversion unit is connected to the rear end of the detector and used for converting the optical signal into an electric signal;
the processor unit is connected with the laser driving unit and is used for adjusting parameters of the driving signal;
the processor unit is connected with the photoelectric conversion unit and used for processing the electric signals and calculating the gas concentration according to the received electric signals.
2. The novel handheld laser hazardous gas telemetry system of claim 1, characterized in that: the processor unit comprises an amplifying and filtering unit, a signal acquisition unit, a signal processing unit, a control unit, a man-machine interface unit, an audible and visual alarm unit and a temperature control unit;
the photoelectric conversion unit comprises an I/V conversion unit for converting current signals collected by the detector into voltage signals;
the amplifying and filtering unit is connected with the I/V conversion unit and is used for amplifying and filtering the electric signals;
the signal acquisition unit is connected with the amplifying and filtering unit and is used for acquiring signals and performing digital-to-analog conversion;
the signal processing unit is connected with the signal acquisition unit and is used for processing the acquired signals;
the temperature control unit is connected with the laser and is used for controlling the temperature of the laser;
the control unit is connected with the signal processing unit and used for adjusting parameters;
the control unit is also connected with the human-computer interface unit and is used for connecting external equipment;
and the sound and light alarm unit is used for triggering an alarm after the concentration exceeds the standard.
3. The novel handheld laser hazardous gas telemetry system of claim 2, characterized in that: the control unit is connected with the green light indicating unit so as to be lightened when the detection light is received and determine the telemetering area.
4. The novel handheld laser hazardous gas telemetry system of claim 3, characterized in that: the control unit is also connected with the image acquisition unit so as to acquire images of the telemetric region.
5. The novel handheld laser hazardous gas telemetry system of claim 3, characterized in that: the control unit is connected with the wireless communication unit and used for uploading and downloading data.
6. The novel handheld laser hazardous gas telemetry system of claim 5, characterized in that: the portable type solar cell module further comprises a handheld type shell, wherein the handheld type shell comprises a handheld part, a lens cone, a front end cover and a rear end cover, a battery bin is arranged in the handheld part, the lens cone is connected with the front end of the handheld part, the front end cover covers the front end of the lens cone, and the rear end cover covers the rear end of the battery bin; the front end of the lens cone is embedded with the Fresnel lens, the rear end of the lens cone is sequentially provided with the optical filter and the detector, and the photoelectric conversion unit and the processor unit are integrated on a circuit board and are arranged in the lens cone; the laser and the collimator are arranged at the center of the lens cone and are overlapped with the central line of the Nefel lens, and the green light indicating unit, the distance measuring module and the image acquisition unit are respectively arranged at the front end of the lens cone.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021764280.0U CN212622192U (en) | 2020-08-21 | 2020-08-21 | Novel handheld laser dangerous gas remote measuring system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021764280.0U CN212622192U (en) | 2020-08-21 | 2020-08-21 | Novel handheld laser dangerous gas remote measuring system |
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| CN212622192U true CN212622192U (en) | 2021-02-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112051219A (en) * | 2020-08-21 | 2020-12-08 | 汉威科技集团股份有限公司 | Novel handheld laser dangerous gas remote measuring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112051219A (en) * | 2020-08-21 | 2020-12-08 | 汉威科技集团股份有限公司 | Novel handheld laser dangerous gas remote measuring system |
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