CN2089173U - Composite sensor for measuring combustible gas concentration - Google Patents
Composite sensor for measuring combustible gas concentration Download PDFInfo
- Publication number
- CN2089173U CN2089173U CN 91202105 CN91202105U CN2089173U CN 2089173 U CN2089173 U CN 2089173U CN 91202105 CN91202105 CN 91202105 CN 91202105 U CN91202105 U CN 91202105U CN 2089173 U CN2089173 U CN 2089173U
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- CN
- China
- Prior art keywords
- infrared receiver
- sensor
- arc resistant
- luminous element
- resistant plastic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model discloses a composite sensor for measuring the combustible gas concentration. The utility model has a metal outer cover (3) which has tight shading as well as good air permeability, a luminous element (1), an infrared receiver (2) and an arc resistant plastic supporting frame (4). The utility model is characterized in that the luminous element (1) and the infrared receiver (2) are oppositely placed or obliquely placed, and the luminous element (1) and the infrared receiver (2) are respectively connected to the electrical conduction pole (5) of the arc resistant plastic supporting frame (4). The luminous element (1) and the infrared receiver (2) are loaded in the metal outer cover (3). Whereas the other end welding conductor wires of the electrical conduction pole (5) on the arc resistant plastic arc resistant plastics supporting frame (4) are led out. The strength of the infrared light which is directly illuminated, reflected or refracted by the infrared receiver (2) and the sensitive luminous element (1) transfers the concentration signal of the combustible gas. The sensor has the advantages of high sensitivity and reliable working. The sensor has no zero point drifting. The sensor can achieve the three-stage explosive-proof grade.
Description
The utility model relates to a compound sensor on the instrument that combustable gas concentration is measured, and particularly combustable gas concentration is carried out continuously compound sensor on the long-term instrument of measuring.
In order to keep the safety in production, usually all to maybe may exist inflammable gas (to contain combustible vapor to existing, at any time the inflammable gas that occurs in the hazardous area down together) carries out the measurement of safe coefficient, and that the sensor that adopts in the surveying instrument has is multiple, wherein comparatively widely used is the catalytic type sensor, and it has identification gaseous combustible whether ability and better measuring accuracy and linear properties.But still there is such problem in this sensor, when combustable gas concentration is carried out continuous coverage, because the consumption of catalyzer and self distillation, the variation of environment temperature, make the zero output signal of catalytic sensor produce drift, influenced measuring accuracy and the linear properties of sensor, even caused adverse consequences combustable gas concentration.
For addressing this problem, common way is the zero output signal value of frequent calibrating sensors when no inflammable gas, overcomes the existing defective of sensor artificially.Technical information " the catalytic combustion type inflammable gas detecting element " literary composition that Japan Riken Meter Co., Ltd. publishes, provable this point.But because in the hazardous area, have inflammable gas or occurred inflammable gas at any time, and the explosion-resistant enclosure that sensor is housed is again to be fixed on certain certain location, the utility appliance of the zero output signal value in the time of just must having a whole set of can guarantee that sensor is in equipment in the pure air and does not have combustible gas as calibrating sensors, this will cause suitable difficulty in actual applications.
The purpose of this utility model is simple possible of proposition, can eliminates because the consumption of catalyzer and self distillation and variation of ambient temperature cause the measurement combustable gas concentration compound sensor of zero output signal drift.It can overcome zero point drift effectively, overcomes existing this defective of general sensor artificially and need not to be provided with zero potentiometer again.
The purpose of this utility model is achieved in that it has a not only tight shading but also metal housing, light-emitting component, infrared receiver and the arc resistant plastic support of good permeability are arranged.It is characterized in that light-emitting component and infrared receiver are opposed or tilting, and be connected on respectively on the conductive pole on the arc resistant plastic support that in the metal housing of packing into, and the other end of the conductive pole on arc resistant plastic support weldering lead is drawn and sent in the metering circuit.Light-emitting component is made by platinum filament, and infrared receiver is made by photodiode.The power of the infrared ray that the responsive light-emitting component direct projection of infrared receiver, reflection or refraction come is transmitted the combustable gas concentration signal.Therefore, above-mentioned both only have the transitive relation of the infrared ray light quantity of inflammable gas generation, and do not have the contact of electric signal.Therefore can not produce zero point drift.
Concrete structure of the present utility model is provided by following most preferred embodiment and accompanying drawing.
Fig. 1 is according to the front view of the measurement combustable gas concentration that the utility model proposes with compound sensor.
Fig. 2 is according to the sectional view of the measurement combustable gas concentration that the utility model proposes with compound sensor.
Below in conjunction with accompanying drawing 1,2, describe in detail according to the details and the working condition that the utility model proposes concrete compound sensor.
With reference to Fig. 1,2, light-emitting component (1) and another infrared receiver (2) independently independently, be fixed on simultaneously on the arc resistant plastic support (4), and the same not only tight shading but also have on the relative position in the metal housing (3) of good permeability of packing into, when the inflammable gas of variable concentrations enters in the metal housing (3) with good permeability, i.e. fission under the effect of light-emitting component (1), produce corresponding infrared ray light quantity, infrared receiver (2) then changes the infrared ray light quantity that receives into corresponding electric signal, send into metering circuit in the combustable gas concentration measuring instrument by conductive pole (5), the net value of inflammable gas content is shown.
Claims (3)
1, measures the combustable gas concentration compound sensor, it has a not only tight shading but also the metal housing (3) of good permeability is arranged, light-emitting component (1), infrared receiver (2) and arc resistant plastic support (4), it is characterized in that light-emitting component (1) and infrared receiver (2) are opposed or tilting, and be connected on respectively on the conductive pole (5) on the arc resistant plastic support (4), in the metal housing of packing into (3), and the other end of the conductive pole (5) on the arc resistant plastic support (4) weldering lead is drawn.
2, compound sensor according to claim 1 is characterized in that light-emitting component (1) made by platinum filament, and infrared receiver (2) is made by photodiode.
3, compound sensor according to claim 1 is characterized in that the power of the infrared ray that the responsive light-emitting component of infrared receiver (2) (1) direct projection, reflection or refraction come, and transmits the combustable gas concentration signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91202105 CN2089173U (en) | 1991-02-09 | 1991-02-09 | Composite sensor for measuring combustible gas concentration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91202105 CN2089173U (en) | 1991-02-09 | 1991-02-09 | Composite sensor for measuring combustible gas concentration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2089173U true CN2089173U (en) | 1991-11-20 |
Family
ID=4912719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91202105 Withdrawn CN2089173U (en) | 1991-02-09 | 1991-02-09 | Composite sensor for measuring combustible gas concentration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2089173U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100416264C (en) * | 2006-06-15 | 2008-09-03 | 武汉工程大学 | Combustible gas sensor preparing method |
-
1991
- 1991-02-09 CN CN 91202105 patent/CN2089173U/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100416264C (en) * | 2006-06-15 | 2008-09-03 | 武汉工程大学 | Combustible gas sensor preparing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Tiantan Instrument & Meter Co., Beijing Document name: payment instructions |
|
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Tiantan Instrument & Meter Co., Beijing Document name: Notice of termination |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |