CN110779873A - Laser optical detection system - Google Patents
Laser optical detection system Download PDFInfo
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- CN110779873A CN110779873A CN201910959467.1A CN201910959467A CN110779873A CN 110779873 A CN110779873 A CN 110779873A CN 201910959467 A CN201910959467 A CN 201910959467A CN 110779873 A CN110779873 A CN 110779873A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
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Abstract
The invention discloses a laser optical detection system in the technical field of laser, which comprises: a laser generating device; the receiving port of the laser receiving device corresponds to the transmitting port of the laser generating device; the control unit, the control unit with laser generating device with laser receiving arrangement electric connection, laser generating device includes: a laser transmitter; the concave lens is arranged at the front end of the emitting opening of the laser emitter, and the laser receiving device comprises a concave lens and a concave lens; a laser receiver; a convex lens installed at a front end of a receiving opening of the laser receiver, the control unit including: a controller; the wireless transmission device is electrically connected with the controller, so that the actual concentration of various dangerous source gases in the underground pipe gallery can be increased, the test area is increased, and the measurement accuracy is improved.
Description
Technical Field
The invention relates to the technical field of laser, in particular to a laser optical detection system.
Background
Laser is another important invention of human beings after nuclear power, computers and semiconductors in 20 th century, and is called as "fastest knife", "best-line ruler" and "brightest light". The english name lightamplification by modulated emission means radiation means "amplification by stimulated emission light". The english full name of the laser has fully expressed the main process of making the laser. The principle of laser light was discovered by the famous american physicist einstein as early as 1916. The atoms are stimulated to emit light, hence the name "laser": when the electrons in the atoms absorb energy and then jump from a low energy level to a high energy level and then fall back from the high energy level to the low energy level, the released energy is released in the form of photons. The induced (excited) photon beam (laser) has highly uniform photon optical characteristics. Compared with a common light source, the laser has good monochromaticity, high brightness and good directivity. The laser is widely applied, and comprises laser marking, laser welding, laser cutting, optical fiber communication, laser ranging, laser radar, laser weapons, laser records, laser correction of vision, laser cosmetology, laser scanning, laser mosquito killer, LIF nondestructive testing technology and the like. Laser systems can be divided into continuous wave lasers and pulsed lasers.
The pipe gallery is a tunnel space built at the low city, integrates various engineering pipelines such as electric power, communication, gas, heat supply, water supply and drainage and the like, is designed uniformly, agrees with construction and management, and is an important infrastructure and a 'life line' for guaranteeing the operation of the city. However, the existing pipe network is lack of effective management in all provinces and cities of the whole country, the environment in the underground pipe network is humid and relatively closed, and a large amount of flammable, explosive, toxic and harmful gases are decomposed by waste water and sewage and accumulated in the closed pipe network space, if the waste water and the sewage cannot be pumped and discharged in time, once the concentration exceeds the standard, explosion or personnel poisoning accidents can be caused. Because the environment in the underground pipe gallery is moist and severe, the conventional gas detection device is difficult to maintain a normal working state for a long time, in the prior art, the concentration of various dangerous source gases can be detected by adopting a laser detection method under certain special conditions, the concentration of the gases is judged by reducing the laser by the gases, the higher the gas concentration is, the more serious the light attenuation is, the lower the gas concentration is, and the smaller the light attenuation is.
A branch of laser is launched through laser generating device, and laser passes through gas, and gas is weakened laser, and laser receiver receives the laser after being attenuated, judges gas concentration through laser attenuation degree, but present laser generating device only can launch single-stranded laser, only can survey the gas on a straight line, can't survey the gas in other regions, the accuracy that can't effectual guarantee surveyed.
Disclosure of Invention
The invention aims to provide a laser optical detection system, which aims to solve the problems that the laser optical detection system provided by the background art emits a beam of laser through a laser generating device, the laser passes through gas, the gas weakens the laser, a laser receiver receives the attenuated laser, and the gas concentration is judged through the attenuation degree of the laser, but the existing laser generating device can only emit single-strand laser, can only detect the gas on one straight line, cannot detect the gas in other areas, and cannot effectively guarantee the detection accuracy.
In order to achieve the purpose, the invention provides the following technical scheme: a laser optical detection system comprising:
a laser generating device;
the receiving port of the laser receiving device corresponds to the transmitting port of the laser generating device;
and the control unit is electrically connected with the laser generating device and the laser receiving device.
Preferably, the laser generating apparatus includes:
a laser transmitter;
and the concave lens is arranged at the front end of the emitting opening of the laser emitter.
Preferably, the laser receiving device includes;
a laser receiver;
and the convex lens is arranged at the front end of the receiving port of the laser receiver.
Preferably, the control unit includes:
a controller;
and the wireless transmission device is electrically connected with the controller.
Preferably, the controller is a PLC controller.
Preferably, the wireless transmission device is a bluetooth module or a WIFI module.
Compared with the prior art, the invention has the beneficial effects that: the invention can increase the test area and improve the measurement accuracy for the actual concentration of various dangerous source gases in the underground pipe gallery, the laser emitter emits laser and transmits the intensity signal of the emitted laser to the controller, the concave lens disperses the laser emitted by the laser emitter to disperse a beam of light into a plurality of parallel light beams, the light beams pass through the dangerous gas of the bottom line pipe gallery, the gas attenuates the light beams when the light beams pass through the gas, the light beams passing through the gas irradiate the convex lens, the dispersed light beams are converged into a beam of light beams by the convex lens to be transmitted to the laser receiver, the laser receiver transmits the intensity signal of the received laser to the controller after receiving the laser, and the emitted intensity signal of the laser and the intensity signal of the received laser are transmitted to the control center by the wireless transmission device, the computer through control center compares two strands of signals, observes the degree of laser decay to this concentration of judging dangerous gas in the underground pipe gallery, and gas concentration is higher, and the more serious of light decay, gas concentration is lower, and the less of light decay.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a block diagram of a laser generator according to the present invention;
FIG. 3 is a block diagram of a laser receiver according to the present invention;
FIG. 4 is a block diagram of a control unit according to the present invention.
In the figure: 100 laser generating devices, 110 laser transmitters, 120 concave lenses, 200 laser receiving devices, 210 laser receivers, 220 convex lenses, 300 control units, 310 controllers and 320 wireless transmission devices.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present invention provides a laser optical detection system, which can improve the measurement accuracy for the actual concentration of various dangerous source gases in an underground pipe gallery, please refer to fig. 1, including a laser generating device 100, a laser receiving device 200 and a control unit 300;
referring to fig. 1 and 2, a laser generator 100 includes:
the laser emitter 110 is used for emitting laser;
the concave lens 120 is arranged at the front end of the emitting port of the laser emitter 110, laser emitted by the laser emitter 110 is diffused into a plurality of parallel light beams through the concave lens 120, the detection area is increased, large-area detection can be performed, the light beams penetrate through various dangerous source gases in the underground pipe gallery, the energy of the light beams is consumed through gas, the light beams penetrating through the gas are received through the laser receiving device 200, and the concentration of the gas in the underground pipe gallery is judged according to the intensity of the received light beams;
referring to fig. 1 and 3, a receiving port of the laser receiving device 200 corresponds to a transmitting port of the laser generating device 100, and the laser receiving device 200 includes;
the receiving port of the laser receiver 210 corresponds to the transmitting port of the laser transmitter 110, and is used for receiving the laser transmitted by the laser transmitter 110;
the convex lens 220 is installed at the front end of the receiving port of the laser receiver 210, the convex lens 220 corresponds to the concave lens 120, and the light rays diffused by the concave lens 120 are gathered together and transmitted to the laser receiver 210 through the convex lens 220;
referring to fig. 1 and 4, the control unit 300 is electrically connected to the laser transmitter 110 and the laser receiver 200, and the control unit 300 includes:
the controller 310 is electrically connected with the laser transmitter 110 and the laser receiver 210, the controller 310 is a PLC controller, the laser transmitter 110 transmits an intensity signal of the emitted laser to the controller 310 while emitting the laser outwards, the laser receiver 210 sends a received intensity signal of the laser to the controller 310 after receiving the laser, and the controller 310 transmits the intensity signal of the emitted laser and the received intensity signal of the laser;
When the underground pipe gallery laser generator is used specifically, the laser generator 100 and the laser receiver 200 are respectively placed at two ends of the underground pipe gallery, an emitting opening of the laser generator 100 corresponds to a receiving opening of the laser receiver 200, the laser emitter 110 emits laser, the laser emitter 110 transmits an intensity signal of the emitted laser to the controller 310, the laser passes through the concave lens 120, the concave lens 120 disperses the laser to enable the laser to be divided into a plurality of parallel light rays, the light rays pass through dangerous gas in the underground pipe gallery, the gas can reduce the passing light rays to enable the front degree of the light rays to be weakened, the light rays passing through the gas irradiate the convex lens 220, the convex lens 220 collects the dispersed light rays, the collected light rays are transmitted to the laser receiver 210, the laser receiver 210 transmits the intensity signal of the received laser to the controller 310, and the controller 310 transmits the two signals to the control center through the wireless transmission device 320, control center compares the light intensity after will receiving with the light intensity of launching away through the computer, observes the degree of light decay, interprets underground pipe gallery interior hazardous gas's concentration through the decay degree.
While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the various features of the embodiments disclosed herein may be used in any combination, provided that there is no structural conflict, and the combinations are not exhaustively described in this specification merely for the sake of brevity and conservation of resources. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (6)
1. A laser optical detection system, characterized by: the method comprises the following steps:
a laser light generating device (100);
a laser receiving device (200), wherein a receiving opening of the laser receiving device (200) corresponds to a transmitting opening of the laser generating device (100);
the control unit (300), the control unit (300) with laser generating device (100) and laser receiving arrangement (200) electric connection.
2. A laser optical detection system according to claim 1, characterized in that: the laser light generation device (100) comprises:
a laser emitter (110);
a concave lens (120), the concave lens (120) being installed at a front end of an emission opening of the laser emitter (110).
3. A laser optical detection system according to claim 1, characterized in that: the laser receiving device (200) comprises;
a laser receiver (210);
the convex lens (220) is installed at the front end of a receiving opening of the laser receiver (210).
4. A laser optical detection system according to claim 1, characterized in that: the control unit (300) comprises:
a controller (310);
the wireless transmission device (320), the wireless transmission device (320) with the controller (310) electrical connection.
5. The laser optical detection system according to claim 4, characterized in that: the controller (310) is a PLC controller.
6. The laser optical detection system according to claim 4, characterized in that: the wireless transmission device (320) is a Bluetooth module or a WIFI module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910959467.1A CN110779873A (en) | 2019-10-10 | 2019-10-10 | Laser optical detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910959467.1A CN110779873A (en) | 2019-10-10 | 2019-10-10 | Laser optical detection system |
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| Publication Number | Publication Date |
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| CN110779873A true CN110779873A (en) | 2020-02-11 |
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| CN201910959467.1A Pending CN110779873A (en) | 2019-10-10 | 2019-10-10 | Laser optical detection system |
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Citations (7)
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|---|---|---|---|---|
| CN101013136A (en) * | 2007-02-08 | 2007-08-08 | 北京工业大学 | Laser-induction fluorescence co-focusing scan device and method |
| CN102354046A (en) * | 2011-07-04 | 2012-02-15 | 上海理工大学 | Method for realizing multichannel frequency division multiplexing fluorescence confocal microscopic imaging technique |
| JP2016133491A (en) * | 2015-01-22 | 2016-07-25 | オリエントブレイン株式会社 | Gas detection device |
| CN106382472A (en) * | 2016-11-02 | 2017-02-08 | 浙江理工大学 | City underground comprehensive pipe gallery intelligent monitoring system based on small aircraft |
| CN107966424A (en) * | 2017-11-02 | 2018-04-27 | 浙江大学 | A kind of lateral imaging method and device reflected based on anti-telescopic system and free form surface |
| CN109444074A (en) * | 2018-12-06 | 2019-03-08 | 中煤科工集团重庆研究院有限公司 | Laser spectrum absorption probe device with self-calibration function and measurement method thereof |
| CN110118751A (en) * | 2019-05-24 | 2019-08-13 | 无锡佶达德光电子技术有限公司 | The laser detection system of automatic adjusument monitoring frequency |
-
2019
- 2019-10-10 CN CN201910959467.1A patent/CN110779873A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101013136A (en) * | 2007-02-08 | 2007-08-08 | 北京工业大学 | Laser-induction fluorescence co-focusing scan device and method |
| CN102354046A (en) * | 2011-07-04 | 2012-02-15 | 上海理工大学 | Method for realizing multichannel frequency division multiplexing fluorescence confocal microscopic imaging technique |
| JP2016133491A (en) * | 2015-01-22 | 2016-07-25 | オリエントブレイン株式会社 | Gas detection device |
| CN106382472A (en) * | 2016-11-02 | 2017-02-08 | 浙江理工大学 | City underground comprehensive pipe gallery intelligent monitoring system based on small aircraft |
| CN107966424A (en) * | 2017-11-02 | 2018-04-27 | 浙江大学 | A kind of lateral imaging method and device reflected based on anti-telescopic system and free form surface |
| CN109444074A (en) * | 2018-12-06 | 2019-03-08 | 中煤科工集团重庆研究院有限公司 | Laser spectrum absorption probe device with self-calibration function and measurement method thereof |
| CN110118751A (en) * | 2019-05-24 | 2019-08-13 | 无锡佶达德光电子技术有限公司 | The laser detection system of automatic adjusument monitoring frequency |
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Application publication date: 20200211 |
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