CN103810818A - Combustible gas alarm - Google Patents
Combustible gas alarm Download PDFInfo
- Publication number
- CN103810818A CN103810818A CN201210440656.6A CN201210440656A CN103810818A CN 103810818 A CN103810818 A CN 103810818A CN 201210440656 A CN201210440656 A CN 201210440656A CN 103810818 A CN103810818 A CN 103810818A
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- China
- Prior art keywords
- circuit
- chip microcomputer
- relay
- gas alarm
- alarm
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Abstract
The invention belongs to the technical field of alarms and particularly relates to a combustible gas alarm. The combustible gas alarm is high in alarm precision and flexible in control. The combustible gas alarm comprises a single-chip microcomputer, a detection circuit, an A/D converting circuit, an acousto-optic alarm circuit, an exhaust fan, a solenoid valve, a relay, an LED display and a power supply. The structural key points of the combustible gas alarm are that the single-chip microcomputer is connected with the A/D converting circuit, the acousto-optic alarm circuit, the relay, the LED display and the power supply; the A/D converting circuit is connected with a detection circuit; and the relay is connected with the exhaust fan and the solenoid valve.
Description
Technical field
the invention belongs to alarm technical field, relate in particular to a kind of flammable gas alarm.
Background technology
along with the raising of people's living standard, increasing people has had higher requirement to the safety and comfort in living space.The leak case of Household gas warner energy Real-Time Monitoring inflammable gas, once reveal, in air, inflammable gas reaches finite concentration, and alarm carries out sound immediately, light is reported to the police, and effectively the generation of Accident prevention, meets the needs of people to gas safe.
existing fuel gas alarm warning precision is not high, control underaction.
Summary of the invention
the present invention is exactly for the problems referred to above, provide a kind of warning precision high, control flammable gas alarm flexibly.
for achieving the above object, the present invention adopts following technical scheme, the present invention includes single-chip microcomputer, testing circuit, A/D change-over circuit, sound light alarming circuit, exhaust fan, solenoid valve, relay, light-emitting diode display and power supply, its structural feature single-chip microcomputer is connected with A/D change-over circuit, sound light alarming circuit, relay, light-emitting diode display and power supply respectively, A/D change-over circuit is connected with testing circuit, and relay is connected with exhaust fan, solenoid valve respectively.
as a kind of preferred version, single-chip microcomputer of the present invention adopts AT89C51 single-chip microcomputer.
as another kind of preferred version, A/D change-over circuit of the present invention adopts ADC0809 chip.
beneficial effect of the present invention.
the gas sensor that the invention provides a kind of performance, parameter stability is detector, and the combustible gas detecting alarm that adopts single-chip microcomputer to control.When having inflammable gas in air in the time volatilizing and gas concentration meets or exceeds setting value, detector produce with air in the linear voltage signal of tested gas concentration, this signal reaches after treatment controller and shows gas concentration value, send immediately sound, visual alarm, can also input associated control signal, start corresponding control device, avoid major accident to occur.The present invention can carry out sound and light alarm according to inflammable gas detectable concentration; and control relevant device and carry out work, realize safeguard protection, be necessary product in city gas engineering; so good market prospects, this has also removed trouble and worry for city dweller uses combustion gas simultaneously.
Accompanying drawing explanation
in order to make technical matters solved by the invention, technical scheme and beneficial effect clearer, below in conjunction with the drawings and the specific embodiments, the present invention is further elaborated.Should be appreciated that embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
fig. 1 is schematic block circuit diagram of the present invention.
Embodiment
as shown in the figure, the present invention includes single-chip microcomputer, testing circuit, A/D change-over circuit, sound light alarming circuit, exhaust fan, solenoid valve, relay, light-emitting diode display and power supply, single-chip microcomputer is connected with A/D change-over circuit, sound light alarming circuit, relay, light-emitting diode display and power supply respectively, A/D change-over circuit is connected with testing circuit, and relay is connected with exhaust fan, solenoid valve respectively.
described single-chip microcomputer adopts AT89C51 single-chip microcomputer.
described A/D change-over circuit adopts ADC0809 chip.ADC0809, the clock signal clk of ADC0809 is provided by the ale signal of 89C51.System crystal oscillator adopts 4MHz, and the positive pulse width that is added in ALE (and START) end of ADC0809 is greater than 250 ns, meets the requirement of ADC0809 to ALE leg signal.The gas concentration signal detecting is the analog input end IN0 that voltage signal is delivered to ADC0809 after amplification, filtering.Because single-chip microcomputer is 8 bit processors, in the time that input voltage is 5V, ADC0809 output numerical value is 255 (FFH), and therefore single-chip microcomputer greatest measure resolution is 0.0196V, and when test, the variation of voltage value is generally with the voltage amplitude variation of 0.02V.If obtain higher precision, should adopt the A/D converter of 12, but this precision meets the demands completely for alarm., can solve by proofreading and correct the reference voltage of ADC0809 substantially than standard value 0.01～0.02V bigger than normal according to measured magnitude of voltage, because the power supply of directly use+5V is as reference voltage, so voltage may have deviation when this system.In addition, the also available software correcting measuring value of programming.The direct current input impedance of ADC0809 is 1 M Ω, can meet general voltage tester needs, and ADC0809 can directly work under the clock frequency of 2～5MHz after tested in addition, can save like this frequency divider.
be understandable that, above about specific descriptions of the present invention, only for being described, the present invention is not limited to the described technical scheme of the embodiment of the present invention, those of ordinary skill in the art is to be understood that, still can modify or be equal to replacement the present invention, to reach identical technique effect; Use needs as long as meet, all within protection scope of the present invention.
Claims (3)
1. flammable gas alarm, comprise single-chip microcomputer, testing circuit, A/D change-over circuit, sound light alarming circuit, exhaust fan, solenoid valve, relay, light-emitting diode display and power supply, it is characterized in that single-chip microcomputer is connected with A/D change-over circuit, sound light alarming circuit, relay, light-emitting diode display and power supply respectively, A/D change-over circuit is connected with testing circuit, and relay is connected with exhaust fan, solenoid valve respectively.
2. flammable gas alarm according to claim 1, is characterized in that described single-chip microcomputer adopts AT89C51 single-chip microcomputer.
3. flammable gas alarm according to claim 1, is characterized in that described A/D change-over circuit adopts ADC0809 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210440656.6A CN103810818A (en) | 2012-11-07 | 2012-11-07 | Combustible gas alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210440656.6A CN103810818A (en) | 2012-11-07 | 2012-11-07 | Combustible gas alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103810818A true CN103810818A (en) | 2014-05-21 |
Family
ID=50707528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210440656.6A Pending CN103810818A (en) | 2012-11-07 | 2012-11-07 | Combustible gas alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103810818A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104599449A (en) * | 2015-02-12 | 2015-05-06 | 金思思 | Gas safety control system |
| CN104715584A (en) * | 2015-01-21 | 2015-06-17 | 安徽师范大学 | Gas alarm device |
| CN109973822A (en) * | 2019-02-15 | 2019-07-05 | 义乌市吉龙科技有限公司 | A kind of leakage-preventing system of Intelligent household gas |
-
2012
- 2012-11-07 CN CN201210440656.6A patent/CN103810818A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104715584A (en) * | 2015-01-21 | 2015-06-17 | 安徽师范大学 | Gas alarm device |
| CN104599449A (en) * | 2015-02-12 | 2015-05-06 | 金思思 | Gas safety control system |
| CN109973822A (en) * | 2019-02-15 | 2019-07-05 | 义乌市吉龙科技有限公司 | A kind of leakage-preventing system of Intelligent household gas |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140521 |