CN104637254A - Sound and light alarm detector for inflammable explosive gases - Google Patents
Sound and light alarm detector for inflammable explosive gases Download PDFInfo
- Publication number
- CN104637254A CN104637254A CN201310545574.2A CN201310545574A CN104637254A CN 104637254 A CN104637254 A CN 104637254A CN 201310545574 A CN201310545574 A CN 201310545574A CN 104637254 A CN104637254 A CN 104637254A
- Authority
- CN
- China
- Prior art keywords
- resistance
- electric capacity
- timer
- operational amplifier
- voltage stabilizer
- 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
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
Abstract
The invention discloses a sound and light alarm detector for inflammable explosive gases, which comprises an AC power supply, a transformer, a rectifier, an operational amplifier, a light emitting diode, a loudspeaker, a gas sensing detector, a potentiometer, a timer, a first voltage regulator, a second voltage regulator, a first capacitor to a third capacitor, and a first resistor to a seventh resistor. When the concentration of an inflammable gas exceeds a certain value, resistor between two ends of the gas sensing detector becomes small, the partial voltage of the resistor and the first resistor is increased, potential at the in-phase input end of the operational amplifier is correspondingly raised, the timer is put in place, signals outputted by the output end of the timer push the loudspeaker to give out sound alarm signals, and the light emitting diode emits light and shines. The sound and light alarm detector for the inflammable explosive gases has the advantages that the structure is simple; adopted elements are few; the size is small; the cost is low; manufacturing is easy; sensitivity is high; and sound production and light emitting alarming functions are provided at the same time.
Description
Technical field
The present invention relates to a kind of explosive or dangerous material detection instrument, particularly relate to a kind of sound and light alarm detection instrument for flammable explosive gas.
Background technology
Explosive of the prior art or dangerous material detection instrument, circuit structure is complicated, adopt element many, bulky, and cost of manufacture is high and be not easy to make, and this detection instrument warning reminding is single, or luminous, or sounding, has sound and light alarm time different.
Summary of the invention
Object of the present invention is just to provide a kind of sound and light alarm detection instrument for flammable explosive gas to solve the problem.
The present invention is achieved through the following technical solutions above-mentioned purpose:
The present invention includes AC power, transformer, rectifier, operational amplifier, light emitting diode, loudspeaker, gas-sensitive detector, potentiometer, timer, first voltage stabilizer, second voltage stabilizer, first electric capacity, second electric capacity, 3rd electric capacity, first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, 6th resistance and the 7th resistance, the positive pole of described AC power is connected with the first end of the first winding of described transformer, second end of described AC power is connected with the second end of described transformer first winding, the first end of described transformer second winding is connected with the power positive end of described rectifier, second end of described transformer second winding is connected with described rectifier power source negative pole end, the positive pole of described rectifier simultaneously with the first end of described first electric capacity, the input end of described first voltage stabilizer is connected with the input end of described second voltage stabilizer, the negative pole of described rectifier simultaneously with the second end of described first electric capacity, the voltage-regulation end of described first voltage stabilizer, the voltage-regulation end of described second voltage stabilizer, the first end of heating wire in described gas-sensitive detector, the first end of described first resistance, the first end of described second resistance, the power-of described operational amplifier is extreme, the first end of described second electric capacity, the earth terminal of described timer, the first end of described loudspeaker is connected with the first end of described 7th resistance, the output terminal of described first voltage stabilizer is connected with the first end of described gas-sensitive detector and the first end of described 3rd resistance simultaneously, the second end of heating wire in the output terminal of described second voltage stabilizer and described gas-sensitive detector, the first end of described potentiometer is connected with the power positive end of described operational amplifier, second end of described gas-sensitive detector is connected with the second end of described first resistance and the in-phase input end of described operational amplifier simultaneously, with the second end of described potentiometer while of the second end of described second resistance, the adjustable side of described potentiometer is connected with the reverse input end of described operational amplifier, second end of described 3rd resistance is connected with the described first end of the 6th resistance and the voltage end of described timer simultaneously, the first end of described 4th resistance is connected with the second end of described second electric capacity and the trigger end of described timer simultaneously, second end of described 4th resistance is connected with the described first end of the 5th resistance and the threshold value end of described timer simultaneously, second end of described 5th resistance is connected with described second end of the 6th resistance and the discharge end of described timer simultaneously, and the second end of described 7th resistance is connected with the negative pole of described light emitting diode, the first end of described 3rd electric capacity is connected with the output terminal of described timer, and described second end of the 3rd electric capacity is connected with the positive pole of the second end of described loudspeaker and described light emitting diode
Beneficial effect of the present invention is:
The present invention is a kind of sound and light alarm detection instrument for flammable explosive gas, have circuit structure simple, adopt that element is few, volume is little, cost is low and the advantage such as easy making, this detector sensitivity is very high simultaneously, has the function of sounding and luminous alarm simultaneously.
Accompanying drawing explanation
Fig. 1 is circuit structure schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1: the present invention includes and comprise AC power AC, transformer T, rectifier DR, operational amplifier A, LED, loudspeaker BL, gas-sensitive detector QM, potentiometer RP, timer IC3, first voltage stabilizer IC1, second voltage stabilizer IC2, first electric capacity C1, second electric capacity C2, 3rd electric capacity C3, first resistance R1, second resistance R2, 3rd resistance R3, 4th resistance R4, 5th resistance R5, 6th resistance R6 and the 7th resistance R7, the positive pole of AC power AC is connected with the first end of first winding of transformer T, second end of AC power AC is connected with the second end of transformer T first winding, the first end of transformer T second winding is connected with the power positive end of rectifier DR, second end of transformer T second winding is extremely connected with rectifier DR power-, the positive pole of rectifier DR simultaneously with the first end of the first electric capacity C1, the input end of the first voltage stabilizer IC1 is connected with the input end of the second voltage stabilizer IC2, the negative pole of rectifier DR simultaneously with second end of the first electric capacity C1, the voltage-regulation end of the first voltage stabilizer IC1, the voltage-regulation end of the second voltage stabilizer IC2, the first end of heating wire in gas-sensitive detector QM, the first end of the first resistance R1, the first end of the second resistance R2, the power-of operational amplifier A is extreme, the first end of the second electric capacity C2, the earth terminal of timer IC3, the first end of loudspeaker BL is connected with the first end of the 7th resistance R7, the output terminal of the first voltage stabilizer IC1 is connected with the first end of gas-sensitive detector QM and the first end of the 3rd resistance R3 simultaneously, the second end of heating wire in the output terminal of the second voltage stabilizer IC2 and gas-sensitive detector QM, the first end of potentiometer RP is connected with the power positive end of operational amplifier A, second end of gas-sensitive detector QM is connected with second end of the first resistance R1 and the in-phase input end of operational amplifier A simultaneously, with second end of potentiometer RP while of second end of the second resistance R2, the adjustable side of potentiometer RP is connected with the reverse input end of operational amplifier A, second end of the 3rd resistance R3 is connected with the first end of the 6th resistance R6 and the voltage end of timer IC3 simultaneously, the first end of the 4th resistance R4 is connected with second end of the second electric capacity C2 and the trigger end of timer IC3 simultaneously, second end of the 4th resistance R4 is connected with the first end of the 5th resistance R5 and the threshold value end of timer IC3 simultaneously, second end of the 5th resistance R5 is connected with second end of the 6th resistance R6 and the discharge end of timer IC3 simultaneously, and second end of the 7th resistance R7 is connected with the negative pole of LED, the first end of the 3rd electric capacity C3 is connected with the output terminal of timer IC3, and second end of the 3rd electric capacity C3 is connected with the positive pole of second end of loudspeaker BL and LED.
As shown in Figure 1: when inflammable gas concentration exceedes certain value, resistance decreasing between gas-sensitive detector QM two ends, then the dividing potential drop of this resistance and the first resistance R1 increases, the corresponding current potential of operational amplifier A in-phase input end that makes raises, and when reference voltage value higher than operational amplifier A reverse input end, operational amplifier A exports high level, make timer IC3 set, the signal promotion loudspeaker BL that the output terminal of timer IC3 exports sends audible warning, and makes LED light-emitting flash.When inflammable gas concentration is normal, between gas-sensitive detector QM two ends, resistance becomes large, and the dividing potential drop of this resistance and the first resistance R1 diminishes, the current potential of corresponding operational amplifier A in-phase input end reduces, operational amplifier A output low level, timer IC3 is resetted, and circuit is not reported to the police.
Claims (1)
1., for a sound and light alarm detection instrument for flammable explosive gas, it is characterized in that: comprise AC power, transformer, rectifier, operational amplifier, light emitting diode, loudspeaker, gas-sensitive detector, potentiometer, timer, first voltage stabilizer, second voltage stabilizer, first electric capacity, second electric capacity, 3rd electric capacity, first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, 6th resistance and the 7th resistance, the positive pole of described AC power is connected with the first end of the first winding of described transformer, second end of described AC power is connected with the second end of described transformer first winding, the first end of described transformer second winding is connected with the power positive end of described rectifier, second end of described transformer second winding is connected with described rectifier power source negative pole end, the positive pole of described rectifier simultaneously with the first end of described first electric capacity, the input end of described first voltage stabilizer is connected with the input end of described second voltage stabilizer, the negative pole of described rectifier simultaneously with the second end of described first electric capacity, the voltage-regulation end of described first voltage stabilizer, the voltage-regulation end of described second voltage stabilizer, the first end of heating wire in described gas-sensitive detector, the first end of described first resistance, the first end of described second resistance, the power-of described operational amplifier is extreme, the first end of described second electric capacity, the earth terminal of described timer, the first end of described loudspeaker is connected with the first end of described 7th resistance, the output terminal of described first voltage stabilizer is connected with the first end of described gas-sensitive detector and the first end of described 3rd resistance simultaneously, the second end of heating wire in the output terminal of described second voltage stabilizer and described gas-sensitive detector, the first end of described potentiometer is connected with the power positive end of described operational amplifier, second end of described gas-sensitive detector is connected with the second end of described first resistance and the in-phase input end of described operational amplifier simultaneously, with the second end of described potentiometer while of the second end of described second resistance, the adjustable side of described potentiometer is connected with the reverse input end of described operational amplifier, second end of described 3rd resistance is connected with the described first end of the 6th resistance and the voltage end of described timer simultaneously, the first end of described 4th resistance is connected with the second end of described second electric capacity and the trigger end of described timer simultaneously, second end of described 4th resistance is connected with the described first end of the 5th resistance and the threshold value end of described timer simultaneously, second end of described 5th resistance is connected with described second end of the 6th resistance and the discharge end of described timer simultaneously, and the second end of described 7th resistance is connected with the negative pole of described light emitting diode, the first end of described 3rd electric capacity is connected with the output terminal of described timer, and described second end of the 3rd electric capacity is connected with the positive pole of the second end of described loudspeaker and described light emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310545574.2A CN104637254A (en) | 2013-11-06 | 2013-11-06 | Sound and light alarm detector for inflammable explosive gases |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310545574.2A CN104637254A (en) | 2013-11-06 | 2013-11-06 | Sound and light alarm detector for inflammable explosive gases |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104637254A true CN104637254A (en) | 2015-05-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310545574.2A Pending CN104637254A (en) | 2013-11-06 | 2013-11-06 | Sound and light alarm detector for inflammable explosive gases |
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| CN (1) | CN104637254A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105389954A (en) * | 2015-11-10 | 2016-03-09 | 潘秀兰 | Combustible gas leakage alarm |
| CN107154130A (en) * | 2017-06-21 | 2017-09-12 | 西安科技大学 | A kind of fire alarm system for intelligent building |
| CN110146552A (en) * | 2019-06-11 | 2019-08-20 | 湖南碧霄环境科技有限公司 | A kind of gas detection alarm system |
| CN113250813A (en) * | 2021-06-23 | 2021-08-13 | 绍兴毅诚电机有限公司 | CO alarm for super capacitive generator |
| CN116071898A (en) * | 2023-04-06 | 2023-05-05 | 湖南孚谷时代科技有限公司 | Independent low-power consumption combustible gas alarm |
-
2013
- 2013-11-06 CN CN201310545574.2A patent/CN104637254A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105389954A (en) * | 2015-11-10 | 2016-03-09 | 潘秀兰 | Combustible gas leakage alarm |
| CN107154130A (en) * | 2017-06-21 | 2017-09-12 | 西安科技大学 | A kind of fire alarm system for intelligent building |
| CN110146552A (en) * | 2019-06-11 | 2019-08-20 | 湖南碧霄环境科技有限公司 | A kind of gas detection alarm system |
| CN113250813A (en) * | 2021-06-23 | 2021-08-13 | 绍兴毅诚电机有限公司 | CO alarm for super capacitive generator |
| CN116071898A (en) * | 2023-04-06 | 2023-05-05 | 湖南孚谷时代科技有限公司 | Independent low-power consumption combustible gas alarm |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150520 |
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| WD01 | Invention patent application deemed withdrawn after publication |