CN203658252U - Miniature far-infrared gas concentration monitoring device - Google Patents
Miniature far-infrared gas concentration monitoring device Download PDFInfo
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- CN203658252U CN203658252U CN201320855204.4U CN201320855204U CN203658252U CN 203658252 U CN203658252 U CN 203658252U CN 201320855204 U CN201320855204 U CN 201320855204U CN 203658252 U CN203658252 U CN 203658252U
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- air chamber
- circuit board
- chamber wall
- light source
- infrared light
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Abstract
The utility model provides a miniature far-infrared gas concentration monitoring device. According to the device, a miniature no-focus multiple-reflection gas chamber is formed by adopting the principle of dual-wavelength infrared monitoring and being assisted by a reasonable microstructure design, and the reflection of infrared light is improved through plating a reflective coating to the internal wall of the gas chamber, thus an infrared detector in a tiny space can obtain adequate information, so as to reflect the concentration of measured gas; far-infrared light required for measurement is obtained through gathering a far-infrared light source by adding a light diaphragm and a window sheet; filtering and waterproof protection are carried out by adopting a structure which consists of a filter mesh and a waterproof breathable membrane, so that the gas chamber and optical elements can be protected while the accuracy of monitoring is guaranteed; the device is provided with data output pins and alarm output pins, which are used for outputting digital gas concentration signals and open collector alarm signals, so that the requirements of hazardous places for gas concentration alarming can be met.
Description
Technical field
The utility model belongs to gas concentration inspect field, be specifically related to a kind of miniature far infrared gas concentration inspect device, adopt microstructure, dual wavelength infrared monitoring principle, carry the gas concentration inspect device that is applicable to far infrared band of digital signal processing and temperature compensation.
Background technology
Dual wavelength infrared-gas concentration monitor is one of focus of at present research, possesses following advantage: can measure multiple gases, measurement range is wide, highly sensitive, precision is high, good stability, there is good selectivity, reliability is high, the life-span is long.
Physical dimension requirement in a lot of fields to gas concentration inspect device is comparatively strict, and this device has clear superiority in many places of installing and apply, and is the target that developer pursues.At the air chamber structure design aspect of device, the focal reflection air chamber of many employings obtained the multiple reflections of infrared light in air chamber in the past, made detector can obtain being enough to reflect the signal intensity of tested gas concentration variation.But construct a focal reflection air chamber, need to carry out strict calculating and could obtain by Precision Machining, this has just increased the cost of development of air chamber.Conventionally, will be on small device integrated more complicated digital signal processing circuit, because the restriction in space is more difficult, people have to adopt complicated external circuit exploitation to reflect the concentration of tested gas, and this way has increased the cost of device secondary development.
Gas for uptake zone at far infrared band, is difficult to find suitable light source, by light source is designed, can meet the monitoring of far infrared region gas concentration.
Summary of the invention
The purpose of this utility model is to provide a kind of miniature far infrared gas concentration inspect device.This device adopts dual wavelength infrared monitoring principle, be aided with afocal multiple reflection air chamber of rational microstructure design forming, carry digital signal processing, temperature compensation, and there is digital signal output and OC warning output function, there is the advantages such as monitoring accuracy is high, reliable and stable, meet the needs of the concentration monitor of Far-infrared Absorption district gas.
The technical solution adopted in the utility model is: a kind of miniature far infrared gas concentration inspect device, and by waterproof ventilated membrane 1, shell 2, screen pack 3, air chamber wall I 4, air chamber wall II 5, air chamber wall III 6, liner 7, circuit board I 8,9,6 circuit pins 10 of circuit board II, far infrared light source 11, binary channels infrared eye 12 forms a whole.Its structure is: waterproof ventilated membrane 1 is close on shell 2, screen pack 3, air chamber wall I 4, air chamber wall II 5, air chamber wall III 6, liner 7, circuit board I 8, circuit board II 9, pack into successively within shell and bonding firmly, 6 circuit pins 10 are welded in circuit board II 9, and stretch out so that with outside being electrically connected, far infrared light source 11 and binary channels infrared eye 12 are contained in circuit board I 8, and the space perfusion fluid sealant between circuit board I 8 and circuit board II 9 forms sealant 14, and bottom is used cover plate 15 to seal.Far infrared light source 11 is provided with diaphragm 16 and diaphragm 17 on it, be fixed and seal by bonding, infrared light by diaphragm 17 in the perforate from diaphragm 16 by injecting air chamber.Far infrared light source 11 and binary channels infrared eye 12 are isolated by liner 7, and sending or receive infrared light by the reference light hole 20 in air chamber wall III 6, measurement light hole 21 and light source hole 22, binary channels infrared eye 12 is provided with reference optical filter 18 above and measures optical filter 19.Described reference optical filter 18 and measurement optical filter 19 are spike interference filter, can measure different gas by the optical filter of selecting different wave length, air chamber wall I 4, air chamber wall II 5 and air chamber wall III 6 form one without focus multiple reflection air chamber 24, air chamber wall I 4 forms the end face of air chamber, on it, there is air admission hole 23 to allow gas to enter air chamber, air chamber wall II 5 forms the sidewall of air chamber and air chamber space is provided, air chamber wall III 6 forms the bottom surface of air chamber and provides infrared light to enter and penetrate the hole of air chamber, air chamber internal face overgild reflectance coating is to increase reflectivity, the infrared light that far infrared light source 11 sends enters without in focus multiple reflection air chamber 24 by the light source hole 22 in air chamber wall III 6, having respectively reference light hole 20 above and measuring light hole 21 of the reference optical filter 18 of binary channels infrared eye 12 and measurement optical filter 19 forms reference channel and measurement passage.Take up space without focus multiple reflection air chamber 24 less, make the space that device bottom is vacated can built-in more complicated signal processing circuit.
In circuit board I 8 and circuit board II 9, comprise the functional circuits such as signal amplification filtering, A/D conversion, data processing, light source driving, circuit board I 8 also comprises a hygrosensor, between two circuit boards, connects each other by electronics web member 13.Device is equipped with 6 circuit pins 10 and is welded on circuit board II 9 and stretches out, be respectively Vd, GND, TX, RX, OC1, OC2, Vd, GND are to provide the pin of power supply access, TX, RX are the pin of sending and receiving digital signal, can externally export the numerical value of tested gas concentration and write the parameter such as temperature compensation and correction at zero point, OC1, OC2 are the pin of open collector output, pre-alarm value and the alarming value of gas concentration are provided respectively, pre-alarm value and alarming value can freely arrange according to actual user demand, after connection TX, RX pin, write.
Advantage and the technique effect of the utility model compared with prior art is:
The utility model, by adopting dual wavelength infrared monitoring principle, is aided with rational microstructure design, designs a kind of miniature far infrared gas concentration inspect device.By adding diaphragm and diaphragm to converge far infrared light source, obtain measuring needed far red light.Increase infrared reflection of light by forming one without focus multiple reflection air chamber and at the gold-plated reflectance coating of air chamber inwall, make infrared eye in small space can obtain enough information to reflect the concentration of tested gas.The structure that adopts screen pack to add waterproof ventilated membrane is filtered, waterproofing protection, in guaranteeing monitoring accuracy, also can protect air chamber and optical element.On device, provide data output pin and warning output pin, externally export gas concentration digital signal and open collector alerting signal, can adapt to the demand that hazardous area gas concentration is reported to the police.
The utility model can be monitored the multiple gases such as SO2, SF6, be field gas concentration inspect and the requisite gordian techniquies of reporting to the police such as oil, chemical industry, Mineral Engineering, it is applied and will be conducive to promote the safety and the safety that ensures relevant practitioner of these industries.
Accompanying drawing explanation
Fig. 1 is the structural representation of device of the present utility model;
Fig. 2 is the part diagram of device of the present utility model;
Fig. 3 is the light-source structure schematic diagram of device of the present utility model;
Fig. 4 is light source and the detector installation diagram of device of the present utility model;
Fig. 5 is the circuit pin schematic diagram of device of the present utility model.
In figure: 1. waterproof ventilated membrane, 2. shell, 3. screen pack, 4. air chamber wall I, 5. air chamber wall II, 6. air chamber wall III, 7. liner, 8. circuit board I, 9. circuit board II, 10.6 circuit pins, 11. far infrared light sources, 12. binary channels infrared eyes, 13. electronics web members, 14. sealants, 15. cover plates, 16. diaphragms, 17. diaphragms, 18. reference optical filters, 19. measure optical filter, 20. reference light holes, 21. measure light hole, 22. light source holes, and 23. air admission holes, 24. without focus multiple reflection air chamber.
Embodiment
Take SO2 and SF6 as example, the structure of the present embodiment as depicted in figs. 1 and 2, by waterproof ventilated membrane 1, shell 2, screen pack 3, air chamber wall I 4, air chamber wall II 5, air chamber wall III 6, liner 7, circuit board I 8, circuit board II 9,6 circuit pins 10, far infrared light source 11, binary channels infrared eye 12 forms a whole.Its structure is: waterproof ventilated membrane 1 is close on shell 2, screen pack 3, air chamber wall I 4, air chamber wall II 5, air chamber wall III 6, liner 7, circuit board I 8, circuit board II 9, pack into successively within shell and bonding firmly, 6 circuit pins 10 are welded in circuit board II 9, and stretch out so that with outside being electrically connected, far infrared light source 11 and binary channels infrared eye 12 are contained in circuit board I 8, and the space perfusion fluid sealant between circuit board I 8 and circuit board II 9 forms sealant 14, and bottom is used cover plate 15 to seal.Air chamber wall I 4, air chamber wall II 5 and air chamber wall III 6 form one without focus multiple reflection air chamber 24, air chamber wall I 4 forms the end face of air chamber, on it, there is air admission hole 23 to allow gas to enter air chamber, air chamber wall II 5 forms the sidewall of air chamber and air chamber space is provided, air chamber wall III 6 forms the bottom surface of air chamber and provides infrared light to enter and penetrate the hole of air chamber, air chamber internal face overgild reflectance coating is to increase reflectivity, the infrared light that far infrared light source 11 sends enters without in focus multiple reflection air chamber 24 by the light source hole 22 in air chamber wall III 6, having respectively reference light hole 20 above and measuring light hole 21 of the reference optical filter 18 of binary channels infrared eye 12 and measurement optical filter 19 forms reference channel and measurement passage.As shown in Figure 3, for the needs of far infrared band monitoring, far infrared light source 11 is provided with diaphragm 16 and diaphragm 17 on it, is fixed and is sealed by bonding, infrared light by diaphragm 17 in the perforate from diaphragm 16 by injecting air chamber, described diaphragm is selected BaF2 diaphragm.As shown in Figure 4, far infrared light source 11 and binary channels infrared eye 12 are isolated by liner 7, and sending or receive infrared light by the reference light hole 20 in air chamber wall III 6, measurement light hole 21 and light source hole 22, binary channels infrared eye 12 is provided with reference optical filter 18 above and measures optical filter 19.Described reference optical filter 18 and measurement optical filter 19 are spike interference filter, can select for different measurement gas the optical filter of different wave length.Described the measurement optical filter 19 for SF6 gas concentration inspect and reference optical filter 18 are spike interference filter, the centre wavelength of measuring optical filter 19 is 10.55 μ m ± 80nm, half-band width is 90nm ± 20nm, the centre wavelength of reference optical filter 18 is 3.95 μ m ± 40nmm, and half-band width is 90nm ± 20nm; The centre wavelength of the measurement optical filter 19 of selecting for SO2 gas is 7.3 μ m ± 40nm, and half-band width is 200nm ± 30nm, and the centre wavelength of reference optical filter 18 is 3.95 μ m ± 20nm, and half-band width is 90nm ± 20nm.
Less without the shared space of focus multiple reflection air chamber 24, make the space that device bottom vacates can built-in more complicated circuit, in circuit board I 8 and circuit board II 9, comprise the functional circuits such as signal amplification filtering, A/D conversion, data processing, light source driving, circuit board I 8 also comprises a hygrosensor, between two circuit boards, connects each other by electronics web member 13.Device is equipped with 6 circuit pins 10 and is welded on circuit board II 9 and stretches out, be respectively Vd, GND, TX, RX, OC1, OC2, it distributes as shown in Figure 5, Vd, GND is to provide the pin of power supply access, TX, RX is the pin of sending and receiving digital signal, can externally export the numerical value of tested gas concentration and write the parameter such as temperature compensation and correction at zero point, OC1, OC2 is the pin of open collector output, pre-alarm and the alerting signal of gas concentration are provided respectively, pre-alarm value can be connected TX with alarming value, after RX pin, write, occurrence freely arranges according to actual user demand.
When device work, monitored gas, through naturally diffusing into this device, remove moisture through waterproof ventilated membrane 1, filter through screen pack 3 again, entered without focus multiple reflection air chamber 24 by air admission hole 23, formed by three parts without focus multiple reflection air chamber 24, air chamber wall I 4, air chamber wall II 5, air chamber wall III 6 forms a miniature space, air chamber inwall overgild reflectance coating, the infrared light that far infrared light source 11 sends is through diaphragm 17, enter air chamber by the hole in diaphragm 16 and air chamber wall III 6, on the gold-plated reflectance coating surface without focus multiple reflection air chamber 24 through multiple reflections by tested gas absorption after by the reference light hole 20 in air chamber wall III 6 with measure light hole 21, arrive the reference optical filter 18 of binary channels detector 12 and measure on optical filter 19, reference optical filter 18 and measurement optical filter 19 are selected respectively the light of corresponding wavelength, output and light intensity have the voltage signal of light, functional circuit in circuit board I 8 and circuit board II 9 changes by the power of analytical voltage signal, just can obtain gas concentration information external output digit signals.
The not detailed disclosed part of the utility model belongs to the known technology of this area.
Although above the illustrative embodiment of the utility model is described; so that those skilled in the art understand the utility model; but should be clear; the utility model is not limited to the scope of embodiment; to those skilled in the art; as long as various variations appended claim limit and the spirit and scope of the present utility model determined in; these variations are apparent, and all innovation and creation that utilize the utility model design are all at the row of protection.
Claims (1)
1. a miniature far infrared gas concentration inspect device, it is characterized in that: by waterproof ventilated membrane (1), shell (2), screen pack (3), air chamber wall I (4), air chamber wall II (5), air chamber wall III (6), liner (7), circuit board I (8), circuit board II (9), 6 circuit pins (10), far infrared light source (11), binary channels infrared eye (12) forms a whole, its structure is: waterproof ventilated membrane (1) is close on shell (2), screen pack (3), air chamber wall I (4), air chamber wall II (5), air chamber wall III (6), liner (7), circuit board I (8), circuit board II (9), pack into successively within shell also bonding firm, 6 circuit pins (10) are welded in circuit board II (9), and stretch out so that with outside being electrically connected, far infrared light source (11) and binary channels infrared eye (12) are contained in circuit board I (8), space perfusion fluid sealant between circuit board I (8) and circuit board II (9) forms sealant (14), bottom is used cover plate (15) to seal,
Far infrared light source (11) is provided with diaphragm (16) and diaphragm (17) on it, be fixed and seal by bonding, infrared light by diaphragm (17) in the perforate from diaphragm (16) by injecting air chamber;
Far infrared light source (11) and binary channels infrared eye (12) are by liner (7) isolation, and send or receive infrared light by the reference light hole (20) in air chamber III (6), measurement light hole (21) and light source hole (22), binary channels infrared eye (12) is provided with reference optical filter (18) above and measures optical filter (19), described reference optical filter (18) and measurement optical filter (19) are spike interference filter, can measure different gas by the optical filter of selecting different wave length;
Air chamber wall I (4), air chamber wall II (5) and air chamber wall III (6) form one without focus multiple reflection air chamber (24), air chamber wall I (4) forms the end face of air chamber, on it, there is air admission hole (23) to allow gas to enter air chamber, air chamber wall II (5) forms the sidewall of air chamber and air chamber space is provided, air chamber wall III (6) forms the bottom surface of air chamber and provides infrared light to enter and penetrate the hole of air chamber, air chamber internal face overgild reflectance coating is to increase reflectivity, the far red light that far infrared light source (11) sends enters without in focus multiple reflection air chamber (24) by the light source hole (22) in air chamber wall III (6), having respectively reference light hole (20) above and measuring light hole (21) of the reference optical filter (18) of binary channels infrared eye (12) and measurement optical filter (19) forms reference channel and measurement passage,
In circuit board I (8) and circuit board II (9), comprise signal amplification filtering, A/D conversion, data processing, the functional circuits such as light source driving, circuit board I (8) also comprises a hygrosensor, between two circuit boards, connect each other by electronics web member (13), device is equipped with 6 circuit pins (10) and is welded on circuit board II (9) and stretches out, be respectively Vd, GND, TX, RX, OC1, OC2, Vd, GND is to provide the pin of power supply access, TX, RX is the pin of sending and receiving digital signal, can externally export the numerical value of tested gas concentration and write the parameter such as temperature compensation and correction at zero point, OC1, OC2 is the pin of open collector output, pre-alarm value and the alarming value of gas concentration are provided respectively, pre-alarm value and alarming value can freely arrange according to actual user demand, connecting TX, after RX pin, write.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320855204.4U CN203658252U (en) | 2013-12-20 | 2013-12-20 | Miniature far-infrared gas concentration monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320855204.4U CN203658252U (en) | 2013-12-20 | 2013-12-20 | Miniature far-infrared gas concentration monitoring device |
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| CN203658252U true CN203658252U (en) | 2014-06-18 |
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| CN201320855204.4U Withdrawn - After Issue CN203658252U (en) | 2013-12-20 | 2013-12-20 | Miniature far-infrared gas concentration monitoring device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698295A (en) * | 2013-12-20 | 2014-04-02 | 中国科学技术大学 | Micro far infrared type gas concentration monitoring method and device |
| CN104359852A (en) * | 2014-11-25 | 2015-02-18 | 云南无线电有限公司 | CO, CO2 and SO2 three-component infrared integrated gas sensor |
| CN107110775A (en) * | 2014-09-15 | 2017-08-29 | 施蓝姆伯格技术公司 | Middle infrared carbon dioxide sensor |
| US10865638B2 (en) | 2014-09-15 | 2020-12-15 | Schlumberger Technology Corporation | Mid-infrared sensor |
| CN113820276A (en) * | 2021-09-07 | 2021-12-21 | 煤炭科学研究总院 | Multi-channel combined miniature seawater absorption characteristic measuring device and mounting structure |
| CN116879215A (en) * | 2023-07-18 | 2023-10-13 | 上海苏萨电子科技有限公司 | Non-dispersive infrared gas sensor |
-
2013
- 2013-12-20 CN CN201320855204.4U patent/CN203658252U/en not_active Withdrawn - After Issue
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698295A (en) * | 2013-12-20 | 2014-04-02 | 中国科学技术大学 | Micro far infrared type gas concentration monitoring method and device |
| CN103698295B (en) * | 2013-12-20 | 2016-03-02 | 中国科学技术大学 | A kind of miniature far infrared gas concentration inspect method and device |
| CN107110775A (en) * | 2014-09-15 | 2017-08-29 | 施蓝姆伯格技术公司 | Middle infrared carbon dioxide sensor |
| US10865638B2 (en) | 2014-09-15 | 2020-12-15 | Schlumberger Technology Corporation | Mid-infrared sensor |
| US10921482B2 (en) | 2014-09-15 | 2021-02-16 | Schlumberger Technology Corporation | Mid-infrared carbon dioxide sensor |
| US11221431B2 (en) | 2014-09-15 | 2022-01-11 | Schlumberger Technology Corporation | Mid-infrared carbon dioxide sensor |
| CN104359852A (en) * | 2014-11-25 | 2015-02-18 | 云南无线电有限公司 | CO, CO2 and SO2 three-component infrared integrated gas sensor |
| CN113820276A (en) * | 2021-09-07 | 2021-12-21 | 煤炭科学研究总院 | Multi-channel combined miniature seawater absorption characteristic measuring device and mounting structure |
| CN113820276B (en) * | 2021-09-07 | 2023-04-18 | 煤炭科学研究总院有限公司 | Miniaturized seawater absorption characteristic measuring device with multiple combined channels and mounting structure |
| CN116879215A (en) * | 2023-07-18 | 2023-10-13 | 上海苏萨电子科技有限公司 | Non-dispersive infrared gas sensor |
| CN116879215B (en) * | 2023-07-18 | 2024-04-09 | 上海苏萨电子科技有限公司 | Non-dispersive infrared gas sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140618 Effective date of abandoning: 20160302 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |