CN1257202A - Toxic gas selective alarm device - Google Patents
Toxic gas selective alarm device Download PDFInfo
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- CN1257202A CN1257202A CN 99120640 CN99120640A CN1257202A CN 1257202 A CN1257202 A CN 1257202A CN 99120640 CN99120640 CN 99120640 CN 99120640 A CN99120640 A CN 99120640A CN 1257202 A CN1257202 A CN 1257202A
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Abstract
The present invention relates to a selective toxic gas alarm and its method. It is characterized by that said device adopts dynamic gas detection technology and single chip processor controlled data processing technology, uses chip microprocessor (or DSP) to control heating process, and in the whole stage of control system work detects output voltage and test voltage. After drive of D/A converter and data input its program can collect the delivered test voltage, judge and automatically record the output voltage of semiconductor gas sensor, after conversion treatment of A/D converter, automatically make frequency spectrum conversion of collected data, and utilize frequency spectrum analysis to discriminate gas, so that it can high-selectively detect gas, and can make quantitative determination of gas concentration.
Description
The present invention relates to a kind of gas alarm and to the method for gas detection signals analyzing and processing, particularly a kind of high selectivity toxic gas alarm and the method that the dynamic acquisition and the spectrum analysis of toxic and harmful detection signal are handled.
The gas alarm complex structure that adopts principles such as infrared ray, galvanochemistry to make in the market, the price height, and the scene that is not easy to accomplish is detected in real time, though adopt the gas alarm low price of semiconductor transducer, can detect in real time, but poor selectivity is misrepresented deliberately and is reported by mistake easily.
The purpose of this invention is to provide a kind of new gas alarm, with the semiconductor transducer is Sensitive Apparatus, adopt a kind of dynamic gas detection technique and monolithic processor controlled data processing technique, make alarm high selectivity be arranged, go for detection poisonous and harmfuls such as hydrogen, carbon monoxide, coal gas or hazardous gas to specific gas.
Technical scheme of the present invention is:
1. toxic gas alarm optionally, comprise: produce change in electric when being used to contact gas, with the semiconductor gas sensor [1] of detected gas, be used to produce and gather the detecting unit [2] of semiconductor gas sensor signal, be used to control single-chip microcomputer or the digital signal processor DSP [3] of heating voltage by the test signal of setting waveform output and the generation of process detecting unit, the A/D that is used for the conversion of analog quantity and digital quantity, D/A converter [4], be used to control the power drive [5] of heating voltage output, be used to show state instruction button [6] with control single chip computer or DSP state, the keyswitch [7] that is used for control single chip computer, be used for the communication interface [8] and the system monitoring [9] that link to each other with computing machine, the display unit [10] that is used for display density;
It is characterized in that: described gas alarm apparatus adopts dynamic gas detection technique and monolithic processor controlled data processing technique, by single-chip microcomputer or DSP[3] with D/A[4] output be connected, be added in semiconductor gas sensor [1] two ends after the heating voltage process power drive [5] of output by the setting waveform, in the dynamic process of detected gas, obtain being periodically variable test voltage, through A/D converter [4] and single-chip microcomputer or DSP[3] be connected, Data Receiving is by system monitoring [9] and DSP CONTROL, via single-chip microcomputer [3] data are carried out spectrum analysis, judge the kind of gas according to the feature that obtains frequency spectrum, and frequency spectrum is made the peak area integration by being integrated in the middle integrating circuit of single-chip microcomputer [3] with one, obtain the concentration of the gas of surveying, go up demonstration at concentration display unit [10].In whole testing process, utilize dynamic gas detection technique and monolithic processor controlled data processing technique, detected gas that can high selectivity, but and quantitative measurement gas concentration.
2. dynamic testing process of toxic gas selective alarm device and detection method,
And, comprising the method that signal carries out the spectrum analysis processing:
(1) is used to the gas sensor that detects;
(2) be used for A/D, the D/A converter that digital quantity and analog quantity are changed;
(3) single-chip microcomputer that is used to finish automatic control program and carries out data processing;
(4) be used for showing and the state instruction button of control single chip computer (or DSP) state;
(5) be used for the keyswitch of control single chip computer;
(6) be used for the communication interface and the system monitoring that link to each other with computing machine;
(7) be used for the display unit of display density;
It is characterized in that:
When (a) program begins, status button is designated as " preparation ", program is carried out initialization;
(b) after the air inlet, the state instruction button is designated as " detection ",,, detects output voltage and test voltage in all stage of control system work by single-chip microcomputer (or DSP) control heating process.Driving and data input through D/A converter, program is gathered the test voltage of output and is judged, after finishing one-period, counter adds one automatically, detect whether finished the data acquisition in 20 cycles then, after sampling is finished, the output voltage of Automatic Program record semiconductor gas sensor, through the conversion process of A/D converter, Automatic Program is carried out spectrum transformation with the data of gathering;
(c) according to different gas spectral shape differences, utilize resulting frequency spectrum, gas is differentiated by spectrum analysis; Simultaneously the peak area of frequency spectrum is made integration, but the height of the stool and urine display density of peak area is finished the detection to concentration, and on the concentration display unit, show;
(d) after detection is finished, the state instruction button is designated as " finishing "
Below in conjunction with accompanying drawing most preferred embodiment is elaborated.
Fig. 1 is the block scheme of main circuit structure of the present invention.
Fig. 2 be program of the present invention the control flow chart of corresponding expression.
Fig. 1 is the block scheme of main circuit structure of the present invention.The principle of this invention is: the gas alarm apparatus adopts dynamic gas detection technique and monolithic processor controlled data processing technique.After the start preheating, program is carried out initialization, and status button is designated as " preparation ", and single-chip microcomputer or DSP3 exported with D/A4 and be connected this moment, control heating voltage output waveform is for setting waveform, and heating voltage is through being added in the two ends of semiconductor gas sensor 1 after the power drive 5; After the air inlet, again status button is designated as " detection "; During detected gas, obtain being periodically variable test voltage in the dynamic process, through behind the A/D converter, data receive control by system monitoring 9 and digital signal processor; After 3 pairs of data of single-chip microcomputer are carried out the spectral conversion analysis, just can judge the kind of gas according to the feature that obtains frequency spectrum, by being integrated in the single-chip microcomputer 3 integrating circuit frequency spectrum is made the peak area integration simultaneously, obtain the concentration of the gas of surveying, on concentration display unit 10, show with one; After the end of test (EOT), the status button indication is classified as " end ".In whole testing process, utilize dynamic gas detection technique and monolithic processor controlled data processing technique, detected gas that can high selectivity, but and quantitative measurement gas concentration.
Fig. 2 be a kind of optionally toxic gas alarm the control flow chart of corresponding expression, represent dynamic testing process and detection method, and signal carried out the method that spectrum analysis is handled, comprising: the gas sensor that is used to detect; The A/D, the D/A converter that are used for the conversion of digital quantity and analog quantity; The single-chip microcomputer that is used to finish automatic control program and carries out data processing; The state instruction button that is used for demonstration and control single chip computer (or DSP) state; The keyswitch that is used for control single chip computer; Be used for the communication interface and the system monitoring that link to each other with computing machine; The display unit that is used for display density;
When program begins, status button is designated as " preparation ", program is carried out initialization; After the air inlet, the state instruction button is designated as " detection ",,, detects output voltage and test voltage in all stage of control system work by single-chip microcomputer (or DSP) control heating process.Driving and data input through D/A converter, program is gathered the test voltage of output and is judged, after finishing one-period, counter adds one automatically, detect whether finished the data acquisition in 20 cycles then, after sampling is finished, the output voltage of Automatic Program record semiconductor gas sensor, through the conversion process of A/D converter, Automatic Program is carried out spectrum transformation with the data of gathering; According to different gas spectral shape differences, utilize resulting frequency spectrum, by spectrum analysis gas is differentiated; Simultaneously the peak area of frequency spectrum is made integration, but the height of the stool and urine display density of peak area is finished the detection to concentration, and on the concentration display unit, show; After detection was finished, the state instruction button was designated as " finishing ".
The invention has the beneficial effects as follows: adopt dynamic gas detection technique and monolithic processor controlled number According to treatment technology, alarm can be designed program according to certain requirement, follow procedure is complete automatically Become data acquisition, record, data processing, the gas of experimental situation to detect etc.; Owing to make With dynamic measuring method, thus obtain about gaseous species and concentration a large amount of comprehensively Information is processed by single-chip microcomputer, kind and concentration that can Accurate Determining gas. Alarm Specific gas is had high selectivity, and being applicable to has hydrogen, carbon monoxide, coal gas etc. are poisonous The detection of evil or hazardous gas.
Claims (2)
1. toxic gas alarm optionally, comprise: produce change in electric when being used to contact gas, with the semiconductor gas sensor [1] of detected gas, be used to produce and gather the detecting unit [2] of semiconductor gas sensor signal, be used to control single-chip microcomputer or the digital signal processor DSP [3] of heating voltage by the test signal of setting waveform output and the generation of process detecting unit, the A/D that is used for the conversion of analog quantity and digital quantity, D/A converter [4], be used to control the power drive [5] of heating voltage output, be used to show state instruction button [6] with control single chip computer or DSP state, the keyswitch [7] that is used for control single chip computer, be used for the communication interface [8] and the system monitoring [9] that link to each other with computing machine, the display unit [10] that is used for display density;
It is characterized in that: described gas alarm apparatus adopts dynamic gas detection technique and monolithic processor controlled data processing technique, by single-chip microcomputer or DSP[3] with D/A[4] output be connected, be added in semiconductor gas sensor [1] two ends after the heating voltage process power drive [5] of output by the setting waveform, in the dynamic process of detected gas, obtain being periodically variable test voltage, through A/D converter [4] and single-chip microcomputer or DSP[3] be connected, Data Receiving is by system monitoring [9] and DSP CONTROL, through single-chip microcomputer [3] data are carried out spectrum analysis, judge the kind of gas according to the feature that obtains frequency spectrum, and frequency spectrum is made the peak area integration by being integrated in the middle integrating circuit of single-chip microcomputer [3] with one, obtain the concentration of the gas of surveying, go up demonstration at concentration display unit [10].In whole testing process, utilize dynamic gas detection technique and monolithic processor controlled data processing technique, detected gas that can high selectivity, but and quantitative measurement gas concentration.
2. dynamic testing process of toxic gas selective alarm device and detection method, and signal carried out the method that spectrum analysis is handled, comprising:
(1) is used to the gas sensor that detects;
(2) be used for A/D, the D/A converter that digital quantity and analog quantity are changed;
(3) single-chip microcomputer that is used to finish automatic control program and carries out data processing;
(4) be used for showing and the state instruction button of control single chip computer (or DSP) state;
(5) be used for the keyswitch of control single chip computer;
(6) be used for the communication interface and the system monitoring that link to each other with computing machine;
(7) be used for the display unit of display density;
It is characterized in that:
When (a) program begins, status button is designated as " preparation ", program is carried out initialization;
(b) after the air inlet, the state instruction button is designated as " detection ",,, detects output voltage and test voltage in all stage of control system work by single-chip microcomputer (or DSP) control heating process.Driving and data input through D/A converter, program is gathered the test voltage of output and is judged, after finishing one-period, counter adds one automatically, detect then and whether finished the data acquisition in 20 cycles, after sampling is finished, the output voltage of Automatic Program record semiconductor gas sensor, conversion process through A/D converter, Automatic Program is carried out spectrum transformation with the data of gathering: (c) according to different gas spectral shape differences, utilize resulting frequency spectrum, gas is differentiated by spectrum analysis; Simultaneously the peak area of frequency spectrum is made integration, but the height of the stool and urine display density of peak area is finished the detection to concentration, and on the concentration display unit, show; (d) after detection is finished, the state instruction button is designated as " finishing "
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991206401A CN1136448C (en) | 1999-12-17 | 1999-12-17 | Toxic gas selective alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991206401A CN1136448C (en) | 1999-12-17 | 1999-12-17 | Toxic gas selective alarm device |
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| Publication Number | Publication Date |
|---|---|
| CN1257202A true CN1257202A (en) | 2000-06-21 |
| CN1136448C CN1136448C (en) | 2004-01-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB991206401A Expired - Fee Related CN1136448C (en) | 1999-12-17 | 1999-12-17 | Toxic gas selective alarm device |
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| Country | Link |
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| CN (1) | CN1136448C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105676739A (en) * | 2007-05-25 | 2016-06-15 | 库珀·克劳斯-海因兹有限责任公司 | Recording Device and Method for Monitoring Device Parameters |
| CN105719436A (en) * | 2016-04-27 | 2016-06-29 | 惠州Tcl移动通信有限公司 | Intelligent mobile terminal and harmful gas detection and reminding method thereof |
| CN105825629A (en) * | 2016-05-31 | 2016-08-03 | 湖南高速铁路职业技术学院 | Automobile and automobile life-support environment monitoring alarm equipment |
| CN106710152A (en) * | 2016-12-30 | 2017-05-24 | 浙江海洋大学 | Engineering explosion formed toxic gas monitoring early warning system design |
-
1999
- 1999-12-17 CN CNB991206401A patent/CN1136448C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105676739A (en) * | 2007-05-25 | 2016-06-15 | 库珀·克劳斯-海因兹有限责任公司 | Recording Device and Method for Monitoring Device Parameters |
| CN105719436A (en) * | 2016-04-27 | 2016-06-29 | 惠州Tcl移动通信有限公司 | Intelligent mobile terminal and harmful gas detection and reminding method thereof |
| CN105825629A (en) * | 2016-05-31 | 2016-08-03 | 湖南高速铁路职业技术学院 | Automobile and automobile life-support environment monitoring alarm equipment |
| CN106710152A (en) * | 2016-12-30 | 2017-05-24 | 浙江海洋大学 | Engineering explosion formed toxic gas monitoring early warning system design |
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| Publication number | Publication date |
|---|---|
| CN1136448C (en) | 2004-01-28 |
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