CN202939778U - Gas leakage alarm - Google Patents
Gas leakage alarm Download PDFInfo
- Publication number
- CN202939778U CN202939778U CN 201220557622 CN201220557622U CN202939778U CN 202939778 U CN202939778 U CN 202939778U CN 201220557622 CN201220557622 CN 201220557622 CN 201220557622 U CN201220557622 U CN 201220557622U CN 202939778 U CN202939778 U CN 202939778U
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- chip microcomputer
- sensor
- alarm
- rectifier bridge
- gas leakage
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Abstract
The utility model relates to the security technology field and provides a gas leakage alarm. The gas leakage alarm comprises a sensor, a signal conditioning unit, an AD conversion device and a one-chip microcomputer which are connected in order, and further comprises a power source module, wherein the one-chip microcomputer is connected with an alarm unit and a display unit, the sensor employs a semiconductor gas sensor MQ-5, the AD conversion device employs an ADC0809, the one-chip microcomputer employs a chip STC89C51, the power source module comprise a rectifier bridge and a three-end voltage stabilizer CW7805, an output end of the rectifier bridge is connected with a filter capacitor, the rectifier bridge is connected with the three-end voltage stabilizer CW7805, and an output end of the three-end voltage stabilizer CW7805 is connected with the filter capacitor.
Description
Technical field
The utility model relates to technical field of security and protection, and a kind of gas leakage alarm is provided.
Background technology
In view of gas explosion in the poisoning and mine of household fuel gas occurs often, cause the generation of unexpected injury.These unnecessary injuries all come from some inflammable gas, at colorless and odorless or under the less gaseous environment of concentration, are difficult to be found by the people, but may have consisted of potential safety hazard this moment.Combustible gas alarm is a kind of safe detecting instrument, it just detects the content of inflammable gas in air, if inflammable gas exceeds normal air content when threatening personal safety or property safety, to note taking and improving safety practice in flammable use coal gas or mine work, control accident potential.But, can not reach and be perfectly safe, universal one situation about losing still can appear.Moreover sometimes have unavoidably people's carelessness.Therefore, the detection alarm of accident potential in place inflammable gas detection alarm such as family, mines, is very important.To avoiding and the control accident has great importance.Gas alarm will automatic alarm, reminds people's taking measures early, avoids accident to occur.
Due to the danger of inflammable gas itself and the significant damage that people's productive life is caused, be therefore the work an of necessity to detection and the warning of inflammable gas.Combustible gas alarm is to utilize the gas sensor technology, the combustable gas concentration and the standard value that detect are compared, carry out corresponding sound and light alarm when exceeding the finite concentration value, prompting is just processed accordingly the personnel of operation, establishment officer withdraws or to this place vented exhaust, avoid the generation of dangerous accident, present family, Active workings are played safely very important effect.
And the gas leakage alarm of prior art to adopt (adopting pure mimic channel) circuit input stage be gas sensor, and the electronic switch that consists of of diode, triode.Consist of complementary multivibrator with two triodes again, he and relay and light emitting diode composition flash alarm.Potentiometer is that warning sensitivity is regulated, and combustable gas concentration is certain, the triode conducting, and relay on-off work, the diode flicker is reported to the police.Although this joint is relatively simple for structure, structure is small and exquisite, adopts the reference voltage of comparer to regulate warning sensitivity, belongs to pure mimic channel and reports to the police, and is relatively difficult in adjustment process.And it is cumbersome to power, and stability is bad.
Summary of the invention
The purpose of this utility model is to provide a kind of gas leakage alarm.
The utility model is by the following technical solutions to achieve these goals:
A kind of gas leakage alarm, it is characterized in that: comprise the sensor that is linked in sequence, the signal condition unit, the AD converting unit, single-chip microcomputer, described single-chip microcomputer is connected with alarm unit and display unit, and described sensor adopts semiconductor gas sensor MQ-5, described AD conversion equipment adopts ADC0809, and described single-chip microcomputer adopts chip STC89C51; Also comprise power module, described power module comprises rectifier bridge, three terminal regulator CW7805, and described rectification bridge output end is connected with filter capacitor, and described rectifier bridge connects three terminal regulator CW7805, and described three terminal regulator CW7805 output terminal is connected with filter capacitor.
The utility model adopts above technical scheme, possesses advantage simple in structure, with low cost.
Description of drawings
Fig. 1 is system block diagram of the present utility model.
Embodiment
A kind of gas leakage alarm, it is characterized in that: comprise the sensor that is linked in sequence, the signal condition unit, the AD converting unit, single-chip microcomputer, described single-chip microcomputer is connected with alarm unit and display unit, and described sensor adopts semiconductor gas sensor MQ-5, described AD conversion equipment adopts ADC0809, and described single-chip microcomputer adopts chip STC89C51; Also comprise power module, described power module comprises rectifier bridge, three terminal regulator CW7805, and described rectification bridge output end is connected with filter capacitor, and described rectifier bridge connects three terminal regulator CW7805, and described three terminal regulator CW7805 output terminal is connected with filter capacitor.
Claims (1)
1. gas leakage alarm, it is characterized in that: comprise the sensor that is linked in sequence, the signal condition unit, the AD converting unit, single-chip microcomputer, described single-chip microcomputer is connected with alarm unit and display unit, and described sensor adopts semiconductor gas sensor MQ-5, described AD conversion equipment adopts ADC0809, and described single-chip microcomputer adopts chip STC89C51; Also comprise power module, described power module comprises rectifier bridge, three terminal regulator CW7805, and described rectification bridge output end is connected with filter capacitor, and described rectifier bridge connects three terminal regulator CW7805, and described three terminal regulator CW7805 output terminal is connected with filter capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220557622 CN202939778U (en) | 2012-10-29 | 2012-10-29 | Gas leakage alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220557622 CN202939778U (en) | 2012-10-29 | 2012-10-29 | Gas leakage alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202939778U true CN202939778U (en) | 2013-05-15 |
Family
ID=48324006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220557622 Expired - Fee Related CN202939778U (en) | 2012-10-29 | 2012-10-29 | Gas leakage alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202939778U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105788183A (en) * | 2016-04-27 | 2016-07-20 | 东华大学 | Gas alarm |
-
2012
- 2012-10-29 CN CN 201220557622 patent/CN202939778U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105788183A (en) * | 2016-04-27 | 2016-07-20 | 东华大学 | Gas alarm |
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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: 20130515 Termination date: 20131029 |