CN203249888U - Device for detecting mixed gas of hydrogen sulfide and carbon monoxide - Google Patents
Device for detecting mixed gas of hydrogen sulfide and carbon monoxide Download PDFInfo
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- CN203249888U CN203249888U CN 201320023092 CN201320023092U CN203249888U CN 203249888 U CN203249888 U CN 203249888U CN 201320023092 CN201320023092 CN 201320023092 CN 201320023092 U CN201320023092 U CN 201320023092U CN 203249888 U CN203249888 U CN 203249888U
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- signal
- carbon monoxide
- sensor array
- gas
- mixed gas
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Abstract
The utility model provides a device for detecting mixed gas of hydrogen sulfide and carbon monoxide. The device mainly comprises three parts of a gas sensor array module, a signal preprocessing circuit module and a mode recognition unit, and is characterized in that three ways of metal-oxide semiconductor gas sensors form a sensor array which performs signal collection on the mixed gas; and then, the sensor array is connected with a voltage follower circuit consisting of an operational amplifier, then connected with an A/D (analog to digital) converter for digitizing a collected analog signal, connected with a single chip machine which is used for performing processing of digital filtering, noise reduction and the like on the signal, and finally connected with a PC (personal computer) through a serial communication interface in a communication manner, so that the digitized signal is transmitted to the PC, processed by the PC and then input into an LED to display concentration of hydrogen sulfide and carbon monoxide.
Description
Affiliated technical field
The utility model relates to a kind of toxic gas detection device, is a kind of sulfuretted hydrogen and Co mixed gas pick-up unit specifically.
Background technology
At present, the classic method that gas detects is to use a sensor to detect, but because there is the problem of cross sensitivity in single-sensor, and this method is difficult to realize the detection to mixed gas.Utilize infrared gas analyzer to become the facies analysis instrument that gas is detected with gas and then have principle of work, device complexity, environment for use requires high, and volume is large, and is expensive, uses the problem that is restricted, and generally can not be used for FEEDBACK CONTROL.
Summary of the invention
In order to overcome above problem, the utility model has designed a kind of gas-detecting device of classifying the basis with sensor array as, not only principle of work, device are simply, with low cost, can measure accurately the toxic gas in the mixed gas---the concentration of sulfuretted hydrogen and carbon monoxide, and can link to each other with host computer, realize Real-Time Monitoring.
The technical scheme that its technical matters that solves the utility model adopts is: sensor array module, the signal pre-processing circuit module is connected with pattern recognition module and is connected, specific as follows: three road metal-oxide semiconductor (MOS) gas sensors form sensor array mixed gas are carried out signals collecting, then the voltage follower circuit that consists of of concatenation operation amplifier, again by the analog signal figure of A/D parallel operation with collection, the input single-chip microcomputer, utilize single-chip microcomputer that signal is carried out digital filtering, the processing such as noise reduction, carrying out communication by serial communication interface and PC again is connected, digitized signal is transferred on the PC, after PC is processed signal, is shown the concentration of sulfuretted hydrogen and carbon monoxide by LCD.
The beneficial effects of the utility model are by real time computer control, can realize the detection to sulfuretted hydrogen and carbon monoxide gas concentration, have good stability, and principle, device are simple, with low cost, practical, are convenient to popularize and use.Can be used as the Electronic Nose hardware platform of sulfuretted hydrogen and Carbon Monoxide Detection, and can be used for the research of other side.
Description of drawings
Fig. 1 is structured flowchart of the present utility model; Fig. 2 is schematic block circuit diagram of the present utility model.
Embodiment
In Fig. 1, this sulfuretted hydrogen and Co mixed gas pick-up unit mainly comprise gas sensor array, Signal Pretreatment and three parts of pattern recognition module.Gas molecule is produced electric signal by 1,2,3 absorption of the gas sensor array in the device.Then the treated processing of electric signal and the transmission that generate judge by pattern recognition system.Gas sensor array produces collection signal; Data Management Analysis device, intelligent interpretation device and knowledge base have the function of analysis, judgement, intelligent interpretation.
In Fig. 2, with single chip computer AT 89C51 chip as control core, three metal-oxide semiconductor (MOS) gas sensors access respectively (s11, s12), (s21, s22), (s31, s32), form gas sensor array mixed gas is carried out signals collecting, then the voltage follower circuit that consists of by operational amplifier LM324, through the analog signal figure of modulus parallel operation AD7888 with collection, the input single-chip microcomputer carries out digital filtering to signal again, the processing such as noise reduction are carried out communication by serial communication interface RS232 with PC again and are connected, digitized signal is transferred on the PC, detects and make the concentration of LCD1602 demonstration sulfuretted hydrogen and carbon monoxide by the on-the-spot automatically control of single-chip microcomputer.
Claims (3)
1. a sulfuretted hydrogen and Co mixed gas pick-up unit, mainly comprise three parts: gas sensor array module, signal pre-processing circuit module and pattern recognition module, three modules connect successively.It is characterized in that: three road metal-oxide semiconductor (MOS) gas sensors form sensor array mixed gas are carried out signals collecting, then the voltage follower circuit that consists of of concatenation operation amplifier, through the analog signal figure of A/D parallel operation with collection, be input to single-chip microcomputer, utilize single-chip microcomputer signal to be carried out the processing such as digital filtering, noise reduction, carrying out communication by serial communication interface and PC again is connected, digitized signal is transferred on the PC, after PC is processed signal, is shown the concentration of sulfuretted hydrogen and carbon monoxide by LED.
2. sulfuretted hydrogen according to claim 1 and carbon monoxide toxic gas detection device is characterized in that: adopted three road gas sensors to form sensor array and linked to each other with the dividing potential drop comparator circuit.
3. sulfuretted hydrogen according to claim 2 and carbon monoxide toxic gas detection device is characterized in that: signal conditioning circuit employing dividing potential drop comparator circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320023092 CN203249888U (en) | 2013-01-16 | 2013-01-16 | Device for detecting mixed gas of hydrogen sulfide and carbon monoxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320023092 CN203249888U (en) | 2013-01-16 | 2013-01-16 | Device for detecting mixed gas of hydrogen sulfide and carbon monoxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203249888U true CN203249888U (en) | 2013-10-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320023092 Expired - Fee Related CN203249888U (en) | 2013-01-16 | 2013-01-16 | Device for detecting mixed gas of hydrogen sulfide and carbon monoxide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203249888U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104950018A (en) * | 2015-07-07 | 2015-09-30 | 西北师范大学 | Mixed gas detecting system |
| CN107421991A (en) * | 2017-06-13 | 2017-12-01 | 潘志君 | A kind of residues of pesticides and gas detection method, detecting system |
-
2013
- 2013-01-16 CN CN 201320023092 patent/CN203249888U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104950018A (en) * | 2015-07-07 | 2015-09-30 | 西北师范大学 | Mixed gas detecting system |
| CN107421991A (en) * | 2017-06-13 | 2017-12-01 | 潘志君 | A kind of residues of pesticides and gas detection method, detecting system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Liu Lihao Document name: Notification to Pay the Fees |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131023 Termination date: 20140116 |