CN203396692U - Infrared detection device for methane concentration - Google Patents
Infrared detection device for methane concentration Download PDFInfo
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- CN203396692U CN203396692U CN201320394336.1U CN201320394336U CN203396692U CN 203396692 U CN203396692 U CN 203396692U CN 201320394336 U CN201320394336 U CN 201320394336U CN 203396692 U CN203396692 U CN 203396692U
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- chip microcomputer
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 238000001514 detection method Methods 0.000 title claims abstract description 17
- 238000005259 measurement Methods 0.000 claims abstract description 18
- 230000003287 optical effect Effects 0.000 claims description 9
- 239000011521 glass Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 239000003245 coal Substances 0.000 abstract description 3
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 9
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000002848 electrochemical method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
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Abstract
The utility model discloses an infrared detection device for methane concentration. The device comprises a single-chip microcomputer, a warning circuit, a display circuit, an infrared light emitting diode, a light collimator, a spectroscope and a detector, wherein the warning circuit and the display circuit are respectively connected with the output end of the single-chip microcomputer, the input end of the single-chip microcomputer is connected with the detector, and the detector comprises a measurement channel and a reference channel; the single-chip microcomputer is connected with the infrared light emitting diode through a driving circuit, and an infrared beam emitted by the infrared light emitting diode enters into a to-be-measured gas chamber through the light collimator, then reaches the spectroscope after penetrating through the to-be-measured gas chamber, and finally are divided into two split beams which respectively enter into the measurement channel and the reference channel. According to the infrared detection device for the methane concentration, a dual-wavelength single-path method is utilized for measuring the methane concentration, the requirements on hardware such as elements are low, the production cost of a product is lowered, meanwhile, the measurement accuracy is improved, the accident incidence rate of a coal mine is reduced, and the production safety of workers in the coal mine is guaranteed.
Description
[technical field]
The utility model relates to a kind of optical measurement sensing technology, particularly a kind of device of infrared detection methane concentration.
[background technology]
Gas detection method has electrochemical method, optical means, electric approach etc., at present, the pick-up unit using in the supervisory system in all collieries at home, all utilize electrochemical method to complete, it utilizes heat catalytic element in variable concentrations methane, make bridge resistor produce different variation and make, it is by two fixed resistances, to form Hui Sideng to detect electric bridge, when methane gas is diffused into detecting element, detecting element carries out rapidly flameless burning, and produce reaction heat, heater resistance value is increased, broken bridge balance, make the voltage signal of a variation of electric bridge output, the size of this voltage signal is directly proportional to the concentration of methane gas, but because the operating environment of domestic mine is complicated, some workplaces coal seam is moist, infiltration, containing acid, to calibration work, bring many uncertain factors, directly the accuracy of impact detection methane and other toxic gases.
[summary of the invention]
The purpose of this utility model is to overcome deficiency of the prior art, and the device of the infrared detection methane concentration that a kind of cost of manufacture is low, accuracy of detection is high is provided.
The purpose of this utility model is achieved in that it comprises single-chip microcomputer, warning circuit, display circuit, infraluminescence diode, optical collimator, spectroscope and detector; Described warning circuit is connected with the output terminal of single-chip microcomputer respectively with display circuit, and the input end of described single-chip microcomputer is connected with detector, and described detector has the passage of measurement and reference channel; Described single-chip microcomputer is connected with infrarede emitting diode by one drive circuit, the infrared beam that described infrarede emitting diode sends incides in air chamber to be measured after optical collimator, infrared beam is through being irradiated on spectroscope after described air chamber to be measured, and is divided in the measurement passage and reference channel that twice divided beams incides respectively detector.
In said structure, in the measurement passage of described detector and reference channel, be respectively arranged with filter plate, it is 3.3 μ m that described filter plate is filtered into wavelength by the divided beams in measurement passage, and with reference to the divided beams in passage, being filtered into wavelength is 4 μ m.
In said structure, described spectroscope is half-reflecting half mirror.
In said structure, in described air chamber to be measured, be provided with total reflection right-angle prism, described infrared beam penetrates air chamber to be measured after described total reflection right-angle prism.
In said structure, between described air chamber to be measured and photoelectric device, be provided with infrared transmitting glass, photoelectric device is isolated in outside air chamber to be measured.
Compared with prior art, the beneficial effects of the utility model are: adopted the method on dual wavelength monochromatic light road to realize the measurement to methane concentration, hardware requirement to components and parts is low, reduced the production cost of product, improved the accuracy of measuring simultaneously, the accident rate that reduces colliery, makes personnel in colliery, reach safe production; In air chamber to be measured, embed and have total reflection right-angle prism, increased the light path of infrared beam, improved the sensitivity that methane gas detects.
[accompanying drawing explanation]
Fig. 1 is principle of work block diagram of the present utility model;
Fig. 2 is infrared beam detection architecture schematic diagram of the present utility model.
[embodiment]
Below in conjunction with the drawings and the specific embodiments, the utility model is further described:
As depicted in figs. 1 and 2, the device of infrared detection methane concentration of the present utility model, it comprises single-chip microcomputer 1, warning circuit 2, display circuit 3, infraluminescence diode 4, optical collimator 5, spectroscope 7 and detector 8; Described warning circuit 2 is connected with the output terminal of single-chip microcomputer 1 respectively with display circuit 3, and the input end of described single-chip microcomputer 1 is connected with detector 8, and described detector 8 has the passage 81 of measurement and reference channel 82; Described single-chip microcomputer 1 is connected with infrarede emitting diode 4 by one drive circuit 11, the infrared beam that described infrarede emitting diode 4 sends incides in air chamber 6 to be measured after optical collimator 5, infrared beam is through being irradiated on spectroscope 7 after described air chamber 6 to be measured, and is divided in the measurement passage 81 and reference channel 82 that twice divided beams incides respectively detector 8.
Because air chamber 6 to be measured is interior except methane, also have other gases, these gases also have and absorb and scattering process infrared light, to testing result, can impact, the utility model adopts Difference Absorption mensuration to eliminate the impact of other gases on testing result, the Difference Absorption mensuration that the utility model is used is to adopt dual wavelength monochromatic light line structure, in the measurement passage 81 of described detector 8 and reference channel 82, be respectively arranged with filter plate 83, by described filter plate 83, the divided beams in measurement passage 81 being filtered into wavelength is 3.3 μ m, with reference to the divided beams in passage 82, being filtered into wavelength is 4 μ m, wavelength be the infrared beam of 3.3 μ m on methane adsorption peak, and methane is that the infrared beam of 4 μ m is substantially without absorbing to another wavelength.
Its principle of work is: by single-chip microcomputer 1, send pulsed drive infraluminescence diode 4 and send infrared beam, single-chip microcomputer 1 gathers the detection signal of measuring passage 81 and reference channel 82 on detector 8 with same frequency simultaneously, after analog digital conversion and linear process, by display circuit 3, demonstrate the methane concentration of air chamber 6 to be measured, and when methane concentration exceeds standard, control warning circuit 2 work, alarm is provided.
Preferably, in order to increase the light path of infrared beam in air chamber 6 to be measured, improve the sensitivity of gas concentration measurement, be provided with a total reflection right-angle prism 61 in air chamber 6 to be measured, described infrared beam penetrates air chamber 6 to be measured after described total reflection right-angle prism 61; Between described air chamber to be measured 6 and photoelectric device (infrarede emitting diode 4, optical collimator 5, spectroscope 7 and detector 8), be provided with infrared transmitting glass 9, photoelectric device is isolated in outside air chamber 6 to be measured; Described spectroscope 7 is half-reflecting half mirror, makes to be divided into twice from the infrared beam of air chamber 6 interior ejaculations to be measured and injects respectively the divided beams of measuring in passage 81 and reference channel 82; For further eliminating the impact of other gases in its air chamber 6 to be measured, in the air intake opening place of air chamber 6 to be measured, be provided with three-layer thin-film layer, one deck has dryer damp-proofing, two layers of acid-proof, three layers of alkali prevention.
The announcement of book and instruction according to the above description, the utility model those skilled in the art can also carry out suitable change and modification to above-mentioned embodiment.Therefore, the utility model is not limited to embodiment disclosed and described above, to modifications and changes more of the present utility model, also should fall in the protection domain of claim of the present utility model.In addition,, although used some specific terms in this instructions, these terms just for convenience of description, do not form any restriction to the utility model.
Claims (5)
1. a device for infrared detection methane concentration, is characterized in that: comprise single-chip microcomputer, warning circuit, display circuit, infraluminescence diode, optical collimator, spectroscope and detector; Described warning circuit is connected with the output terminal of single-chip microcomputer respectively with display circuit, and the input end of described single-chip microcomputer is connected with detector, and described detector has the passage of measurement and reference channel;
Described single-chip microcomputer is connected with infrarede emitting diode by one drive circuit, the infrared beam that described infrarede emitting diode sends incides in air chamber to be measured after optical collimator, infrared beam is through being irradiated on spectroscope after described air chamber to be measured, and is divided in the measurement passage and reference channel that twice divided beams incides respectively detector.
2. the device of infrared detection methane concentration according to claim 1, it is characterized in that: in the measurement passage of described detector and reference channel, be respectively arranged with filter plate, it is 3.3 μ m that described filter plate is filtered into wavelength by the divided beams in measurement passage, and with reference to the divided beams in passage, being filtered into wavelength is 4 μ m.
3. the device of infrared detection methane concentration according to claim 1 and 2, is characterized in that: described spectroscope is half-reflecting half mirror.
4. the device of infrared detection methane concentration according to claim 1, is characterized in that: in described air chamber to be measured, be provided with total reflection right-angle prism, described infrared beam penetrates air chamber to be measured after described total reflection right-angle prism.
5. the device of infrared detection methane concentration according to claim 1, is characterized in that: between described air chamber to be measured and photoelectric device, be provided with infrared transmitting glass, photoelectric device is isolated in outside air chamber to be measured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320394336.1U CN203396692U (en) | 2013-07-03 | 2013-07-03 | Infrared detection device for methane concentration |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320394336.1U CN203396692U (en) | 2013-07-03 | 2013-07-03 | Infrared detection device for methane concentration |
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| Publication Number | Publication Date |
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| CN203396692U true CN203396692U (en) | 2014-01-15 |
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| CN201320394336.1U Expired - Fee Related CN203396692U (en) | 2013-07-03 | 2013-07-03 | Infrared detection device for methane concentration |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105203491A (en) * | 2015-10-10 | 2015-12-30 | 山东省科学院海洋仪器仪表研究所 | In-situ detection system for concentration of methane in deep sea |
| CN105738309A (en) * | 2016-02-04 | 2016-07-06 | 杭州巨之灵科技有限公司 | Methane detector and method |
| CN107941737A (en) * | 2017-11-21 | 2018-04-20 | 北京东宇宏达科技有限公司 | Methane gas quality inspection device and its detection method |
| CN109342348A (en) * | 2018-11-09 | 2019-02-15 | 深圳邺诚科技有限公司 | A dual-channel infrared gas sensor |
| CN109709059A (en) * | 2019-01-17 | 2019-05-03 | 上海化工研究院有限公司 | A long optical path pulse infrared laser absorption gas sampling monitoring device |
| CN110361355A (en) * | 2019-08-15 | 2019-10-22 | 深圳市诺安环境安全股份有限公司 | Spiral gas concentration detection device, manufacturing method thereof and alarm device |
| CN110553987A (en) * | 2019-08-28 | 2019-12-10 | 华中科技大学 | gas detection method and system |
| CN115046960A (en) * | 2022-06-15 | 2022-09-13 | 中国天楹股份有限公司 | Near infrared spectrum detection single light source double light path system |
| CN115165787A (en) * | 2022-07-14 | 2022-10-11 | 合肥清溢光电有限公司 | Mask plate coating LCVD carrier gas concentration adjusting and measuring equipment |
-
2013
- 2013-07-03 CN CN201320394336.1U patent/CN203396692U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105203491A (en) * | 2015-10-10 | 2015-12-30 | 山东省科学院海洋仪器仪表研究所 | In-situ detection system for concentration of methane in deep sea |
| CN105738309A (en) * | 2016-02-04 | 2016-07-06 | 杭州巨之灵科技有限公司 | Methane detector and method |
| CN107941737A (en) * | 2017-11-21 | 2018-04-20 | 北京东宇宏达科技有限公司 | Methane gas quality inspection device and its detection method |
| CN109342348A (en) * | 2018-11-09 | 2019-02-15 | 深圳邺诚科技有限公司 | A dual-channel infrared gas sensor |
| CN109709059A (en) * | 2019-01-17 | 2019-05-03 | 上海化工研究院有限公司 | A long optical path pulse infrared laser absorption gas sampling monitoring device |
| CN109709059B (en) * | 2019-01-17 | 2021-12-21 | 上海化工研究院有限公司 | Long optical path pulse infrared laser absorption type gas sampling monitoring device |
| CN110361355A (en) * | 2019-08-15 | 2019-10-22 | 深圳市诺安环境安全股份有限公司 | Spiral gas concentration detection device, manufacturing method thereof and alarm device |
| CN110361355B (en) * | 2019-08-15 | 2024-01-05 | 深圳市诺安智能股份有限公司 | Spiral gas concentration detection device, manufacturing method thereof and alarm device |
| CN110553987A (en) * | 2019-08-28 | 2019-12-10 | 华中科技大学 | gas detection method and system |
| CN115046960A (en) * | 2022-06-15 | 2022-09-13 | 中国天楹股份有限公司 | Near infrared spectrum detection single light source double light path system |
| CN115165787A (en) * | 2022-07-14 | 2022-10-11 | 合肥清溢光电有限公司 | Mask plate coating LCVD carrier gas concentration adjusting and measuring equipment |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140115 Termination date: 20140703 |
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| EXPY | Termination of patent right or utility model |