CN107274638A - A kind of gas leakage detecting device - Google Patents
A kind of gas leakage detecting device Download PDFInfo
- Publication number
- CN107274638A CN107274638A CN201710615531.5A CN201710615531A CN107274638A CN 107274638 A CN107274638 A CN 107274638A CN 201710615531 A CN201710615531 A CN 201710615531A CN 107274638 A CN107274638 A CN 107274638A
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- CN
- China
- Prior art keywords
- amplifier
- gas sensor
- electric capacity
- gas
- resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/12—Alarms for ensuring the safety of persons responsive to undesired emission of substances, e.g. pollution alarms
- G08B21/16—Combustible gas alarms
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Emergency Alarm Devices (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention discloses a kind of gas leakage detecting device, it is made up of first resistor to the 4th resistance, the first electric capacity, the second electric capacity, the first amplifier, the second amplifier, gas sensor, potentiometer, triode, loudspeaker and battery, work as Combustible Gas Leak, when making the combustable gas concentration of interior more than limit value, when gas sensor output voltage is higher than the conversion voltage of the first amplifier, the multivibrator work of first amplifier and the second amplifier composition, from the second amplifier outputting oscillation signal.After the signal amplifies through triode, loudspeaker is promoted to send alarm.Adjust the resistance value of potentiometer, the detection sensitivity for adjusting gas sensor.Compared with prior art, the present invention constitutes multivibrator, the signal of effective amplification gas sensor using dual amplifier, meanwhile, gas sensor can adjust detection sensitivity, improve the detection sensitivity of gas leakage, so as to improve safety coefficient, the value with popularization and application.
Description
Technical field
The present invention relates to a kind of safety device, more particularly to a kind of gas leakage detecting device.
Background technology
Combustion gas is the general name of gaseous fuel, and it can burn and release heat, be used for city dweller and industrial enterprise.Combustion gas
Species it is a lot, mainly have natural gas, manufactured gas, manufactured fuel gas, liquefied petroleum gas and biogas, coal gas.In the prior art, indoor fuel gas
Leakage is difficult to be noticeable, and causes potential safety hazard, Fuel Gas Leak Alarm species of the prior art is various, and function respectively has quality,
In order to improve safety coefficient, it is necessary to constantly improve and innovation.
The content of the invention
The purpose of the present invention is that provides a kind of gas leakage detecting device to solve the above problems.
The present invention is achieved through the following technical solutions above-mentioned purpose：
The present invention is by first resistor to the 4th resistance, the first electric capacity, the second electric capacity, the first amplifier, the second amplifier, gas
Body sensor, potentiometer, triode, loudspeaker and battery composition, the positive pole of battery colelctor electrode simultaneously with triode, second are put
The cathode power supply end of big device, the negative pole of voltage-stabiliser tube, the first end of the first electric capacity, the first end of potentiometer, the sliding end of potentiometer
Connected with the first end of gas sensor, the negative pole of battery is while the negative power supply of the first end, gas sensor with loudspeaker
End, the second end of the first electric capacity, the first end connection of the positive pole of voltage-stabiliser tube and first resistor, the second end of first resistor and gas
The second end of heater strip and the second end of potentiometer are connected in the first end connection of heater strip, gas sensor in sensor, gas
Second end of body sensor is linked with the positive signal end of the first amplifier, the negative signal end of the first amplifier and second resistance
First end connection, the second end of second resistance is connected with the first end of 3rd resistor and the first end of the second electric capacity simultaneously, the
The output end of one amplifier is connected with the negative signal end of the second amplifier, the positive signal end of the second amplifier and 3rd resistor
The connection of the second end, the output end of the second amplifier is connected with the second end of the second electric capacity and the first end of the 4th resistance simultaneously,
Second end of the 4th resistance and the base stage of triode are connected, and the emitter stage of triode and the second end of loudspeaker are connected.
The beneficial effects of the present invention are：
The present invention is a kind of gas leakage detecting device, compared with prior art, and the present invention constitutes many using dual amplifier
Harmonic oscillator, the signal of effective amplification gas sensor, meanwhile, gas sensor can adjust detection sensitivity, improve combustion
The detection sensitivity of gas leakage, so that safety coefficient is improved, the value with popularization and application.
Brief description of the drawings
Fig. 1 is the circuit structure schematic diagram of the present invention.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings：
As shown in Figure 1：The present invention is put by first resistor R1 to the 4th resistance R4, the first electric capacity C1, the second electric capacity C2, first
Big device IC1, the second amplifier IC2, gas sensor Q, potentiometer RP, triode VT, loudspeaker Y and battery E compositions, battery E
Positive pole simultaneously with triode VT colelctor electrode, the second amplifier IC2 cathode power supply end, voltage-stabiliser tube DW negative pole, first electricity
Hold C1 first end, potentiometer RP first end, potentiometer RP sliding end and gas sensor Q first end connection, battery E
Negative pole simultaneously with loudspeaker Y first end, gas sensor Q negative electricity source, the first electric capacity C1 the second end, voltage-stabiliser tube
DW positive pole and first resistor R1 first end connection, first resistor R1 the second end and the of heater strip in gas sensor Q
One end is connected, and the second end of heater strip is connected with potentiometer RP the second end in gas sensor Q, and the second of gas sensor Q
The positive signal end with the first amplifier IC1 is held to link, the first amplifier IC1 negative signal end and the first of second resistance R2
End connection, second resistance R2 the second end is connected with 3rd resistor R3 first end and the second electric capacity C2 first end simultaneously, the
One amplifier IC1 output end is connected with the second amplifier IC2 negative signal end, the second amplifier IC2 positive signal end
It is connected with 3rd resistor R3 the second end, the second end and the 4th of the second amplifier IC2 output end simultaneously with the second electric capacity C2
Resistance R4 first end connection, the 4th resistance R4 the second end is connected with triode VT base stage, triode VT emitter stage and
Loudspeaker Y the second end connection.
The operation principle of the present invention is as follows：
When interior (is less than limit value) without imflammable gas or combustable gas concentration in allowed band, gas sensor
Resistance is larger between two ends, and the first amplifier IC1 output end output voltage is relatively low, and multivibrator does not work, in loudspeaker Y
Voiceless sound.When imflammable gas (coal gas or natural gas) leakage, when making the combustable gas concentration of interior more than limit value, gas is passed
Sensor Q output voltages be higher than the first amplifier IC1 conversion voltage when, the first amplifier IC1 and the second amplifier IC2 composition
Multivibrator works, from the second amplifier IC2 outputting oscillation signals.After the signal amplifies through triode VT, loudspeaker Y is promoted
Send alarm.Adjust potentiometer RP resistance value, the detection sensitivity for adjusting gas sensor Q.
The general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (1)
1. a kind of gas leakage detecting device, it is characterised in that：By first resistor to the 4th resistance, the first electric capacity, the second electric capacity,
First amplifier, the second amplifier, gas sensor, potentiometer, triode, loudspeaker and battery composition, the positive pole of battery are same
When and triode colelctor electrode, the cathode power supply end of the second amplifier, the negative pole of voltage-stabiliser tube, the first end of the first electric capacity, current potential
The first end connection of the first end of device, the sliding end of potentiometer and gas sensor, the negative pole of battery simultaneously with loudspeaker the
One end, the negative electricity source of gas sensor, the second end of the first electric capacity, the first end of the positive pole of voltage-stabiliser tube and first resistor connect
Connect, the second end of first resistor is connected with the first end of heater strip in gas sensor, the second of heater strip in gas sensor
End is connected with the second end of potentiometer, and the second end of gas sensor is linked with the positive signal end of the first amplifier, and first puts
The negative signal end of big device and the first end of second resistance are connected, the first end of the second end of second resistance simultaneously with 3rd resistor
Connected with the first end of the second electric capacity, the output end of the first amplifier is connected with the negative signal end of the second amplifier, and second puts
The positive signal end of big device and the second end of 3rd resistor are connected, the output end of the second amplifier simultaneously with the second electric capacity second
The first end of end and the 4th resistance is connected, and the base stage of the second end of the 4th resistance and triode is connected, the emitter stage of triode with
The second end connection of loudspeaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710615531.5A CN107274638A (en) | 2017-07-26 | 2017-07-26 | A kind of gas leakage detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710615531.5A CN107274638A (en) | 2017-07-26 | 2017-07-26 | A kind of gas leakage detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107274638A true CN107274638A (en) | 2017-10-20 |
Family
ID=60078594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710615531.5A Pending CN107274638A (en) | 2017-07-26 | 2017-07-26 | A kind of gas leakage detecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107274638A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5441196A (en) * | 1977-09-07 | 1979-04-02 | Matsushita Electric Ind Co Ltd | Gas leakage alarm |
| CN2574446Y (en) * | 2002-09-16 | 2003-09-24 | 蒋英兰 | Miner alarming safety cap |
| CN204833620U (en) * | 2015-06-29 | 2015-12-02 | 周菊芳 | Gas leakage alarm device |
| CN207008838U (en) * | 2017-07-26 | 2018-02-13 | 广东工业大学 | A kind of gas leakage detecting device |
-
2017
- 2017-07-26 CN CN201710615531.5A patent/CN107274638A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5441196A (en) * | 1977-09-07 | 1979-04-02 | Matsushita Electric Ind Co Ltd | Gas leakage alarm |
| CN2574446Y (en) * | 2002-09-16 | 2003-09-24 | 蒋英兰 | Miner alarming safety cap |
| CN204833620U (en) * | 2015-06-29 | 2015-12-02 | 周菊芳 | Gas leakage alarm device |
| CN207008838U (en) * | 2017-07-26 | 2018-02-13 | 广东工业大学 | A kind of gas leakage detecting device |
Non-Patent Citations (1)
| Title |
|---|
| 华仔: "《华强电子网，http://tech.hqew.com/circuit_1530465》", 10 August 2016 * |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171020 |
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| RJ01 | Rejection of invention patent application after publication |