CN109883978A - Multiple light courcess light cone array gas sensor and detection method - Google Patents
Multiple light courcess light cone array gas sensor and detection method Download PDFInfo
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- CN109883978A CN109883978A CN201910229712.3A CN201910229712A CN109883978A CN 109883978 A CN109883978 A CN 109883978A CN 201910229712 A CN201910229712 A CN 201910229712A CN 109883978 A CN109883978 A CN 109883978A
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- cone array
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Abstract
Detection method carries out gas detection by multiple light courcess light cone array gas sensor, and steps are as follows: 1) multiple light courcess light cone array gas sensor being set on detector, and detected to gas；2) when detecting, modulation of source circuit board drives multiple infrared light supplies simultaneously, and infrared light supply issues infrared light；3) infrared light that infrared light supply issues, which is reflected while being actually taken up by gas by light cone array reflection cavity side wall, reaches light cone laser pump cavity；4) light cone laser pump cavity collects the light converged from light cone array reflection cavity, and is converged to infrared detector again using light cone；5) detector signal collecting circuit board handles infrared detector signal and converts thereof into gas concentration.
Description
Technical field
The present invention relates to sensing detection technologies, more particularly to detection technique, specifically, it shows a kind of multiple light courcess light cone
Array gas sensor and detection method.
Background technique
Infrared gas sensor is to utilize non-dispersive infrared absorption principle (NDIR, Non-Dispersive Infrared)
The sensor for being used to detect target gas levels of preparation has the advantages that precision is high, and stability is good, and the service life is long.It is general red
Outer gas sensor mainly include for emitting the infrared light supply of infrared light, the optical cavity for reflecting infrared light, for connecing
The infrared detector of receipts infrared light and corresponding control circuit.During actually detected, infrared detector is received infrared
Light intensity approximation meets Lambert-Beer's law:, wherein I0For the infrared light intensity that infrared light supply issues, α is target gas
The Infrared Absorption Coefficient of body, C are the concentration of object gas, and I is the light intensity magnitude that external detector receives, and L is that light passes through light
Optical path length after cavity reflections from light source to detector；Under optical path and the identical situation of gas concentration, the intensity of light source is got over
Height, the light intensity signal that detector detects is bigger, and the response rate of infrared gas sensor is higher, when one timing of noise, sensor
Resolution ratio is higher.
System infrared gas sensor generally uses single light source, and long light path design improves detection by increasing optical path length
The resolution ratio of device, but as the increase of light path, radiation direction are not easily controlled, the light intensity decreasing of detector is eventually arrived at, effectively
Amount of light is reduced, and precision is not high.Commercial infrared gas sensor precision is generally in 50ppm(carbon dioxide at present) and 2%LEL
The level of (methane), special gas precision is worse, only 300ppm, it is difficult to it is higher and higher to detection accuracy to meet industrial environment
It is required that
Therefore, it is necessary to provide a kind of multiple light courcess light cone array gas sensor and detection method to solve the above problems.
Summary of the invention
The object of the present invention is to provide a kind of multiple light courcess light cone array gas sensors, are enhanced by introducing multiple light courcess
The intensity of light source, while having using light cone and increasing the special of light path and optically focused, the response rate and precision of gas sensor are improved, it is full
Sufficient special gas is to small-range, high-resolution requirement.
Technical solution is as follows:
A kind of multiple light courcess light cone array gas sensor, including light cone array reflection cavity, light cone array reflection cavity include several equal
Even arrangement and downward tapered light source channel, top is provided with infrared light supply in light source channel, and lower end is for being provided with optically focused
Module；Concentration module includes light cone laser pump cavity, light cone laser pump cavity include be correspondingly arranged with light source channel and it is downward tapered poly-
Optical channel and the infrared detector for being set to optically focused channel.
Further, the outer surface of light cone array reflection cavity offers several cyclic annular stomatas.
Further, infrared detector is correspondingly arranged on detector signal collecting circuit board, and infrared light supply is correspondingly arranged on
Modulation of source circuit board.
Further, infrared detector is fixedly arranged by welding on detector signal collecting circuit board.
Further, several infrared light supplies are fixedly arranged by welding on modulation of source circuit board.
Further, infrared light supply quantity is no less than four.
The second object of the present invention is to provide a kind of detection method, pass through above-mentioned multiple light courcess light cone array gas sensing
Device carries out gas detection, and steps are as follows:
1) multiple light courcess light cone array gas sensor is set on detector, and gas is detected；
2) when detecting, modulation of source circuit board drives multiple infrared light supplies simultaneously, and infrared light supply issues infrared light；
3) infrared light that infrared light supply issues reflects by light cone array reflection cavity side wall while being actually taken up by gas arrival light cone and gathers
Optical cavity；
4) light cone laser pump cavity collects the light converged from light cone array reflection cavity, and is converged to again using light cone
Infrared detector；
5) detector signal collecting circuit board handles infrared detector signal and converts thereof into gas concentration.
Compared with prior art, multiple infrared light supplies by being parallel to together while being irradiated on detector by the present invention
Face is added significantly to light intensity, while the characteristics of utilization light cone reflecting condensation, greatly improving the light of light absorption gas
Journey.By reinforcing light intensity and increasing light path, the response rate and detection accuracy of gas sensor are greatly improved, has filled up red
Outer technology is in special gas small-range, the blank in high-precision field.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment of the present invention.
Fig. 2 is that the light of the embodiment of the present invention propagates schematic diagram.
Specific embodiment
Embodiment:
Referring to Fig. 2, the present embodiment shows a kind of multiple light courcess light cone array gas sensor, including light cone array reflection cavity 3, light
Boring array reflection cavity 3 includes several evenly distributed and downward tapered light source channel 31, and top is provided in light source channel 31
Infrared light supply 2, lower end is for being provided with concentration module；Concentration module includes light cone laser pump cavity 4, and light cone laser pump cavity 4 includes and light
Tapered optically focused channel 41 that source channels are correspondingly arranged and downward and the infrared detector 5 for being set to optically focused channel 41.
The outer surface of light cone array reflection cavity 3 offers several cyclic annular stomatas 32.
Infrared detector 5 is correspondingly arranged on detector signal collecting circuit board 6, and infrared light supply 2 is correspondingly arranged on light source tune
Circuit board 1 processed.
Infrared detector 5 is fixedly arranged by welding on detector signal collecting circuit board 6.
Several infrared light supplies 2 are fixedly arranged by welding on modulation of source circuit board 1.
In the present embodiment, 2 quantity of infrared light supply is set as 8, but the restriction not to the present embodiment, is only this reality
Apply a kind of setting means of example.
Gas detection is carried out using the present embodiment, steps are as follows:
1) multiple light courcess light cone array gas sensor 1 is set on detector, and gas is detected；
2) when detecting, modulation of source circuit board 1 drives multiple infrared light supplies 2 simultaneously, and infrared light supply 2 issues infrared light；
3) infrared light that infrared light supply hair 2 goes out reflects by 3 side wall of light cone array reflection cavity while being actually taken up by gas arrival light cone
Laser pump cavity 4；
4) light cone laser pump cavity 4 collects the light converged from light cone array reflection cavity 3, and is converged again using light cone
To infrared detector 5；
5) detector signal collecting circuit board 6 handles 5 signal of infrared detector and converts thereof into gas concentration.
Compared with prior art, multiple infrared light supplies by being parallel to together while being irradiated on detector by the present invention
Face is added significantly to light intensity, while the characteristics of utilization light cone reflecting condensation, greatly improving the light of light absorption gas
Journey.By reinforcing light intensity and increasing light path, the response rate and detection accuracy of gas sensor are greatly improved, has filled up red
Outer technology is in special gas small-range, the blank in high-precision field.
Above-described is only some embodiments of the present invention.For those of ordinary skill in the art, not
Under the premise of being detached from the invention design, various modifications and improvements can be made, these belong to protection model of the invention
It encloses.
Claims (7)
1. a kind of multiple light courcess light cone array gas sensor, it is characterised in that: including light cone array reflection cavity, the reflection of light cone array
Chamber includes several evenly distributed and downward tapered light source channel, and top is provided with infrared light supply, lower end pair in light source channel
In being provided with concentration module；Concentration module includes light cone laser pump cavity, light cone laser pump cavity include be correspondingly arranged with light source channel and
Downward tapered optically focused channel and the infrared detector for being set to optically focused channel.
2. a kind of multiple light courcess light cone array gas sensor according to claim 1, it is characterised in that: the reflection of light cone array
The outer surface of chamber offers several cyclic annular stomatas.
3. a kind of multiple light courcess light cone array gas sensor according to claim 2, it is characterised in that: infrared detector pair
It should be provided with detector signal collecting circuit board, infrared light supply is correspondingly arranged on modulation of source circuit board.
4. a kind of multiple light courcess light cone array gas sensor according to claim 3, it is characterised in that: infrared detector is logical
It crosses to be welded and fixed and be set on detector signal collecting circuit board.
5. a kind of multiple light courcess light cone array gas sensor according to claim 4, it is characterised in that: several infrared light supplies
It is fixedly arranged by welding on modulation of source circuit board.
6. a kind of multiple light courcess light cone array gas sensor according to claim 5, it is characterised in that: infrared light supply quantity
No less than four.
7. a kind of detection method carries out gas detection by multiple light courcess light cone array gas sensor described in claim 5,
Steps are as follows:
1) multiple light courcess light cone array gas sensor is set on detector, and gas is detected；
2) when detecting, modulation of source circuit board drives multiple infrared light supplies simultaneously, and infrared light supply issues infrared light；
3) infrared light that infrared light supply issues reflects by light cone array reflection cavity side wall while being actually taken up by gas arrival light cone and gathers
Optical cavity；
4) light cone laser pump cavity collects the light converged from light cone array reflection cavity, and is converged to again using light cone
Infrared detector；
5) detector signal collecting circuit board handles infrared detector signal and converts thereof into gas concentration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910229712.3A CN109883978A (en) | 2019-03-26 | 2019-03-26 | Multiple light courcess light cone array gas sensor and detection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910229712.3A CN109883978A (en) | 2019-03-26 | 2019-03-26 | Multiple light courcess light cone array gas sensor and detection method |
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| CN109883978A true CN109883978A (en) | 2019-06-14 |
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| CN201910229712.3A Pending CN109883978A (en) | 2019-03-26 | 2019-03-26 | Multiple light courcess light cone array gas sensor and detection method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114636694A (en) * | 2022-05-17 | 2022-06-17 | 广东盈峰科技有限公司 | Water environment on-line automatic detection device and detection method |
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| CN2555516Y (en) * | 2002-05-22 | 2003-06-11 | 南京智达分析仪器有限公司 | Convergent double beam structure using small cone of light |
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| US20060218987A1 (en) * | 2005-04-04 | 2006-10-05 | Campman James P | Arson and forensic scanner having a hydrocarbon gas detector with a detachable collector cone and kit assembly |
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| CN201196701Y (en) * | 2008-02-05 | 2009-02-18 | 西安力源光电科技有限责任公司 | Receiving device of near-infrared detection apparatus |
| CN101477048A (en) * | 2009-01-21 | 2009-07-08 | 北京市华云分析仪器研究所有限公司 | Pulsation type gas filtering related optical component |
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| CN114636694A (en) * | 2022-05-17 | 2022-06-17 | 广东盈峰科技有限公司 | Water environment on-line automatic detection device and detection method |
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