CN1136448C - Selective poison gas alarm and alarm method - Google Patents
Selective poison gas alarm and alarm method Download PDFInfo
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- CN1136448C CN1136448C CNB991206401A CN99120640A CN1136448C CN 1136448 C CN1136448 C CN 1136448C CN B991206401 A CNB991206401 A CN B991206401A CN 99120640 A CN99120640 A CN 99120640A CN 1136448 C CN1136448 C CN 1136448C
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- gas
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- chip microcomputer
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000002341 toxic gas Substances 0.000 title claims abstract description 12
- 239000007789 gas Substances 0.000 claims abstract description 64
- 238000001514 detection method Methods 0.000 claims abstract description 25
- 238000012360 testing method Methods 0.000 claims abstract description 18
- 238000001228 spectrum Methods 0.000 claims abstract description 16
- 238000012545 processing Methods 0.000 claims abstract description 14
- 239000004065 semiconductor Substances 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 9
- 238000010183 spectrum analysis Methods 0.000 claims abstract description 7
- 238000012544 monitoring process Methods 0.000 claims description 7
- 230000010354 integration Effects 0.000 claims description 6
- 230000003595 spectral effect Effects 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 230000009466 transformation Effects 0.000 claims description 3
- 210000002700 urine Anatomy 0.000 claims description 3
- 230000009931 harmful effect Effects 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 239000003034 coal gas Substances 0.000 description 2
- 231100001261 hazardous Toxicity 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 230000007096 poisonous effect Effects 0.000 description 2
- 101100388212 Arabidopsis thaliana DSP3 gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Abstract
A selective poison gas alarm and alarm method features that dynamic gas detection technique and data processing technique controlled by single-chip computer are used, the heating process is controlled by single-chip computer or DSP, and the output voltage and test voltage are detected in the whole working stage of control system. The output test voltage is acquired and judged by a program and the output voltage of the semiconductor gas sensor is automatically recorded through the driving of the D/A converter and the data input, the acquired data is automatically subjected to frequency spectrum conversion through the conversion processing of the A/D converter, the gas is identified through frequency spectrum analysis, the gas can be detected with high selectivity, and the gas concentration can be quantitatively measured.
Description
Technical field
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.
Background technology
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.
Summary of the invention
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: a kind of optionally toxic gas alarm, 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.
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 is connected, output is added in semiconductor gas sensor [1] two ends by the heating voltage of setting waveform after through power drive [5].
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, and frequency spectrum is made the peak area integration by being integrated in the single-chip microcomputer [3] integrating circuit with one according to the feature that obtains frequency spectrum, 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.
Described toxic gas selective alarm device comprises:
(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 to show state instruction button with 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.
The method that toxic gas selective alarm device detects toxic gas:
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 ", by single-chip microcomputer or DSP
Control heating process, in all stage of control system work, detect output voltage and
Test voltage, through the driving of D/A converter and data input, program is to output
Test voltage is gathered and is judged that after finishing one-period, counter adds automatically
One, detect whether finished the data acquisition in 20 cycles then, after sampling is finished,
The output voltage of Automatic Program record semiconductor gas sensor is through A/D converter
Conversion process, Automatic Program is carried out spectrum transformation with the data of gathering;
(c) according to different gas spectral shape differences, utilize resulting frequency spectrum, by frequently
Analysis of spectrum is differentiated gas; Simultaneously the peak area of frequency spectrum is made integration, peak area
But the height of stool and urine display density is finished the detection to concentration, and shows single in concentration
Show in the unit;
(d) after detection is finished, the state instruction button is designated as " finishing ".
The invention has the beneficial effects as follows: adopt dynamic gas detection technique and monolithic processor controlled data processing technique, alarm can be designed program according to certain requirement, and automatically follow procedure is finished data acquisition, record, data processing, gas detection of experimental situation or the like; Owing to used dynamic measuring method, thereby obtained a large amount of comprehensively information about gaseous species and concentration, handle by single-chip microcomputer, can accurately measure the kind and the concentration of gas.Alarm has high selectivity to specific gas, is applicable to the detection to poisonous and harmfuls such as hydrogen, carbon monoxide, coal gas or hazardous gas.
Description of drawings
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.
Embodiment
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 ".
Claims (2)
1, a kind of optionally toxic gas alarm, 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, a kind of a kind of toxic gas selective alarm device as claimed in claim 1 is characterized in that the method that toxic gas detects:
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 ", heated by single-chip microcomputer or DSP control
Journey in all stage of control system work, detects output voltage and test voltage, process
The driving of D/A converter and data input, program is gathered the test voltage of output and is declared
Disconnected, after finishing one-period, counter adds one automatically, detects whether finished 20 then
The data acquisition in cycle, after sampling was finished, Automatic Program write down the defeated of semiconductor gas sensor
Go out voltage, through the conversion process of A/D converter, Automatic Program is carried out frequency with the data of gathering
Spectral transformation; (c) according to different gas spectral shape differences, utilize resulting frequency spectrum, by spectrum analysis to gas
Body is differentiated; Simultaneously the peak area of frequency spectrum is made integration, the stool and urine of peak area can show dense
The height of degree is finished the detection to concentration, and is shown on the concentration display unit; (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 | Selective poison gas alarm and alarm method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991206401A CN1136448C (en) | 1999-12-17 | 1999-12-17 | Selective poison gas alarm and alarm method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1257202A CN1257202A (en) | 2000-06-21 |
| CN1136448C true 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 | Selective poison gas alarm and alarm method |
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| Country | Link |
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| CN (1) | CN1136448C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007024423B4 (en) * | 2007-05-25 | 2019-09-12 | Cooper Crouse-Hinds Gmbh | Recording device and method for monitoring device parameters |
| CN105719436B (en) * | 2016-04-27 | 2019-01-11 | 深圳市Tcl云创科技有限公司 | A kind of intelligent mobile terminal and its pernicious gas detect based reminding method |
| 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 |
| CN110243877A (en) * | 2019-06-21 | 2019-09-17 | 启东纳睿新材料科技有限公司 | A kind of fast gas quantitative testing device suitable for multiple gases |
-
1999
- 1999-12-17 CN CNB991206401A patent/CN1136448C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1257202A (en) | 2000-06-21 |
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Granted publication date: 20040128 Termination date: 20111217 |