CN202886264U - High-sensitivity infrared gas sensor - Google Patents
High-sensitivity infrared gas sensor Download PDFInfo
- Publication number
- CN202886264U CN202886264U CN 201220583938 CN201220583938U CN202886264U CN 202886264 U CN202886264 U CN 202886264U CN 201220583938 CN201220583938 CN 201220583938 CN 201220583938 U CN201220583938 U CN 201220583938U CN 202886264 U CN202886264 U CN 202886264U
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- heat
- tested gas
- infrared radiation
- visible light
- light reflecting
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Abstract
The utility model discloses a high-sensitivity infrared gas sensor. The sensor comprises a circuit board, a tested gas white light source and a tested gas deflection membrane, wherein the tested gas deflection membrane comprises a heat-absorbing infrared radiation layer and a visible light reflecting layer; the heat-absorbing infrared radiation layer is close to one side of the tested gas white light source; the external surface of the heat-absorbing infrared radiation layer is a plane; the external surface of the visible light reflecting layer is a concave-convex surface; and a space between the external surface of the heat-absorbing infrared radiation layer and the external surface of the visible light reflecting layer is filled with a heat absorbing material. The concave-convex surface structure of the visible light reflecting layer enables the tested gas deflecting membrane to form a plurality of micro-deformation units connected in series, and the deformation degree of the tested gas deflecting membrane is obtained by superposition of the deformation degrees of the plurality of micro-deformation units, namely one efficient front end amplifier without electric appliance noises is arranged in the sensor, so that the response sensitivity of the sensor to small changes of gas concentration is effectively improved at low cost.
Description
Technical field
The utility model relates to a kind of infrared gas sensor, relates in particular to a kind of high sensitivity infrared gas sensor.
Background technology
Gas sensor is to adopt the element that the gas that detects is had a sensitivity characteristic concentration of gas to be converted into the device of corresponding electric signal.In the gas sensor, infrared gas sensor is that purposes gas extensive, the most with the fastest developing speed is stopped sensor.
Existing infrared gas sensor has an important defective: various gases are very faint to the absorption of infrared spectrum, concentration is lower, the variable quantity of infrared signal is less, has greatly improved the designing requirement of sensor front end and follow up amplifier, is difficult to realize cheaply high sensitivity.
The utility model content
The purpose of this utility model provides a kind of cheaply high sensitivity infrared gas sensor with regard to being in order to address the above problem.
The utility model is achieved through the following technical solutions above-mentioned purpose:
High sensitivity infrared gas sensor described in the utility model comprises circuit board, tested gas white light source and tested gas deflection film, described tested gas deflection film comprises heat-absorbing infrared radiation layer and visible light reflecting layer, and described heat-absorbing infrared radiation layer is near described tested gas white light source one side; The outside surface of described heat-absorbing infrared radiation layer is the plane, and the outside surface of described visible light reflecting layer is male and fomale(M﹠F), is filled with heat-absorbing material in the space between the outside surface of described heat-absorbing infrared radiation layer and the outside surface of described visible light reflecting layer.
Particularly, described heat-absorbing material is polyethylene terephthalate.
As preferably, the end handle of described tested gas deflection film one end is installed on the described circuit board by heat insulation post.
The beneficial effects of the utility model are:
The male and fomale(M﹠F) structure of visible light reflecting layer makes tested gas deflection film form little deformation unit of a plurality of series connection, the deflection of tested gas deflection film is got by a plurality of little deformation unit stacks, be equivalent in sensor, be provided with a front-end amplifier that does not efficiently have the electrical equipment noise, effectively improved the response sensitivity of sensor to the faint variation of gas concentration with low cost.
Description of drawings
Fig. 1 is the cut-open view of high sensitivity infrared gas sensor described in the utility model;
Fig. 2 is the enlarged drawing of A among Fig. 1.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1, high sensitivity infrared gas sensor described in the utility model is comprised of circuit board 2, optical conductor 1, tested gas white light source 9, reference gas white light source (not shown), tested gas RGB sensor 10, reference gas RGB sensor (not shown), base 4, loam cake 6, tested gas deflection film 8, reference gas moveable diaphragm (not shown), insulating ring 3 and optical filter 7; As shown in Figure 2, tested gas deflection film 8 comprises heat-absorbing infrared radiation layer 82 and visible light reflecting layer 84, and heat-absorbing infrared radiation layer 82 is near tested gas white light source 9 one sides; The outside surface of heat-absorbing infrared radiation layer 82 is the plane, and the outside surface of visible light reflecting layer 84 is male and fomale(M﹠F), is filled with heat-absorbing material 83 in the space between the outside surface of the outside surface of heat-absorbing infrared radiation layer 82 and visible light reflecting layer 84; As depicted in figs. 1 and 2, the end handle 81 of tested gas deflection film 8 one ends is installed on the circuit board 2 by heat insulation post 5.Heat-absorbing material 83 adopts polyethylene terephthalate.
As depicted in figs. 1 and 2, in the application, visible light reflecting layer 84 adopts diffraction grating structure, its male and fomale(M﹠F) makes tested gas deflection film 8 form little deformation unit of a plurality of series connection, the deflection of tested gas deflection film 8 is got by a plurality of little deformation unit stacks, be equivalent to be provided with in sensor a front-end amplifier that does not efficiently have the electrical equipment noise, its enlargement factor can up to more than 2000 times, improve the response sensitivity of sensor to the faint variation of gas concentration with low cost effectively.
Claims (3)
1. high sensitivity infrared gas sensor, comprise circuit board, tested gas white light source and tested gas deflection film, it is characterized in that: described tested gas deflection film comprises heat-absorbing infrared radiation layer and visible light reflecting layer, and described heat-absorbing infrared radiation layer is near described tested gas white light source one side; The outside surface of described heat-absorbing infrared radiation layer is the plane, and the outside surface of described visible light reflecting layer is male and fomale(M﹠F), is filled with heat-absorbing material in the space between the outside surface of described heat-absorbing infrared radiation layer and the outside surface of described visible light reflecting layer.
2. high sensitivity infrared gas sensor according to claim 1, it is characterized in that: described heat-absorbing material is polyethylene terephthalate.
3. high sensitivity infrared gas sensor according to claim 1, it is characterized in that: the end handle of described tested gas deflection film one end is installed on the described circuit board by heat insulation post.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220583938 CN202886264U (en) | 2012-11-08 | 2012-11-08 | High-sensitivity infrared gas sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220583938 CN202886264U (en) | 2012-11-08 | 2012-11-08 | High-sensitivity infrared gas sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202886264U true CN202886264U (en) | 2013-04-17 |
Family
ID=48077678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220583938 Expired - Lifetime CN202886264U (en) | 2012-11-08 | 2012-11-08 | High-sensitivity infrared gas sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202886264U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105928647A (en) * | 2016-06-30 | 2016-09-07 | 梅特勒-托利多(常州)精密仪器有限公司 | Force transducer |
-
2012
- 2012-11-08 CN CN 201220583938 patent/CN202886264U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105928647A (en) * | 2016-06-30 | 2016-09-07 | 梅特勒-托利多(常州)精密仪器有限公司 | Force transducer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130417 |