CN201773082U - Semiconductor gas sensor - Google Patents
Semiconductor gas sensor Download PDFInfo
- Publication number
- CN201773082U CN201773082U CN2010202992259U CN201020299225U CN201773082U CN 201773082 U CN201773082 U CN 201773082U CN 2010202992259 U CN2010202992259 U CN 2010202992259U CN 201020299225 U CN201020299225 U CN 201020299225U CN 201773082 U CN201773082 U CN 201773082U
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- resistor
- sensor
- assembly
- gas sensor
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Abstract
The utility model provides a semiconductor gas sensor which comprises a sensor housing, a sensitive bulk resistor arranged in the sensor housing and N groups of voltage division components, wherein each voltage division component comprises a load resistor and a switch, which are connected together in series, and the resistances of the load resistors of the N groups of the voltage division components are different; and the sensitive bulk resistor is connected with the N groups of the voltage division components in series respectively, two ends of the sensitive bulk resistor and two ends of the N group of the voltage division components are respectively connected with the same constant voltage, and N is a natural number which is not less than 2. The sensor has the advantages of being flexible and convenient, having wide range of applications, being high in detection precision and being capable of measuring multiple objects by using one sensor.
Description
Technical field
The utility model relates to a kind of gas sensor, specifically, relates to a kind of semiconductor gas sensor.
Background technology
Conventional semiconductor gas sensor detection method normally with the sensitive body resistance of sensor and a pull-up resistor series connection, then, two terminates to it on fixing voltage again, and is last, and the variation by the sensing lead resistive voltage comes measure gas concentrations;
But in real work, be not difficult to find: at different gas, sensor is different to the requirement of voltage, that is, at the voltage that the sensitive body resistance two ends of sensor connect, when detecting different gas, its precision is affected; Therefore, the conventional semiconductor gas sensor satisfying under the situation of accuracy of detection, can only detect certain gas, and this has brought great inconvenience to the user, and it has, and range of application is narrow and small, the distinct disadvantage of very flexible.
For this reason, people are seeking a kind of desirable technical solution that is tending towards always.
The utility model content
The utility model is at the deficiencies in the prior art, provide a kind of easy to use, accuracy of detection is high, can detect the semiconductor gas sensor of multiple gases.
The technical scheme that the utility model adopted is as follows: a kind of semiconductor gas sensor, it includes sensor outer housing, is arranged on sensitive body resistance and N component pressure assembly in the sensor outer housing, described dividing potential drop assembly comprises a pull-up resistor and switch that is serially connected, and the N component presses the pull-up resistor resistance of assembly inequality; Described sensitive body resistance presses assembly to connect with the N component respectively, presses the two ends of assembly to be connected same constant voltage respectively in described sensitive body resistance and N component; Wherein, N is not less than 2 natural number.
The relative prior art of the utility model has substantive distinguishing features and progress, specifically, this semiconductor gas sensor can detect multiple gases again when satisfying accuracy of detection, its have flexible, have wide range of applications, accuracy of detection height, surveys many advantages.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
Below by embodiment, the technical solution of the utility model is described in further detail.
As shown in Figure 1, a kind of semiconductor gas sensor, it includes the shell of sensor CGQ, sensitive body resistance and the N component that is arranged in the shell of sensor CGQ pressed assembly; Described dividing potential drop assembly comprises a pull-up resistor and switch that is serially connected, and the N component presses the pull-up resistor resistance of assembly inequality; Described sensitive body resistance presses assembly to connect with the N component respectively, presses the two ends of assembly to be connected same constant voltage U respectively in described sensitive body resistance and N component;
That is, pressing pull-up resistor R1, the K switch 1 of assembly to be connected in series with first component successively sensitive body resistance, then, is that the two ends of sensitive body resistance, pull-up resistor R1 and K switch 1 are connected constant voltage U the three;
Pressing pull-up resistor R2, the K switch 2 of assembly to be connected in series with second component successively sensitive body resistance, then, is that the two ends of sensitive body resistance, pull-up resistor R2 and K switch 2 are connected constant voltage U the three;
Pressing pull-up resistor R3, the K switch 3 of assembly to be connected in series with the 3rd component successively sensitive body resistance, then, is that the two ends of sensitive body resistance, pull-up resistor R3 and K switch 3 are connected constant voltage U the three;
By that analogy;
Pressing pull-up resistor Rn, the K switch n of assembly to be connected in series with the N component successively sensitive body resistance, then, is that the two ends of sensitive body resistance, pull-up resistor Rn and K switch n are connected constant voltage U the three;
Wherein, N is not less than 2 natural number.
A kind of multiple gases detection method of semiconductor gas sensor, this method comprises: according to the character of survey gas, select the pull-up resistor corresponding with survey gas, close the switch corresponding again with this pull-up resistor, then, measure the magnitude of voltage at described sensitive body resistance or these pull-up resistor two ends, can record the concentration of the gas of surveying.
Each component presses the pull-up resistor resistance of assembly different, under the constant situation of constant voltage U, select pull-up resistor and the switch corresponding with survey gas, in voltage circuit, pull-up resistor will have different dividing potential drops, promptly, can make the sensitive body resistance of semiconductor gas sensor obtain the dividing potential drop of a relative ideal, so, be beneficial to the accuracy of detection of semiconductor gas sensor, simultaneously, also can make semiconductor gas sensor have the measuring ability of multiple gases.
Should be noted that at last: above embodiment only is not intended to limit in order to the explanation the technical solution of the utility model; Although with reference to preferred embodiment the utility model is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or the part technical characterictic is equal to replacement embodiment of the present utility model; And not breaking away from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope that the utility model asks for protection.
Claims (1)
1. semiconductor gas sensor, include sensor outer housing and be arranged on the interior sensitive body resistance of sensor outer housing, it is characterized in that: this semiconductor gas sensor also includes the N component and presses assembly, described dividing potential drop assembly comprises a pull-up resistor and switch that is serially connected, and the N component presses the pull-up resistor resistance of assembly inequality; Described sensitive body resistance presses assembly to connect with the N component respectively, presses the two ends of assembly to be connected same constant voltage respectively in described sensitive body resistance and N component; Wherein, N is not less than 2 natural number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202992259U CN201773082U (en) | 2010-08-20 | 2010-08-20 | Semiconductor gas sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202992259U CN201773082U (en) | 2010-08-20 | 2010-08-20 | Semiconductor gas sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201773082U true CN201773082U (en) | 2011-03-23 |
Family
ID=43752929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202992259U Expired - Fee Related CN201773082U (en) | 2010-08-20 | 2010-08-20 | Semiconductor gas sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201773082U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949887A (en) * | 2010-08-20 | 2011-01-19 | 郑州炜盛电子科技有限公司 | Semiconductor gas sensor and various gas detection method thereof |
-
2010
- 2010-08-20 CN CN2010202992259U patent/CN201773082U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949887A (en) * | 2010-08-20 | 2011-01-19 | 郑州炜盛电子科技有限公司 | Semiconductor gas sensor and various gas detection method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110323 Termination date: 20130820 |