CN107749149A - A kind of detection alarm for being used for flammable toxic gas in environment - Google Patents
A kind of detection alarm for being used for flammable toxic gas in environment Download PDFInfo
- Publication number
- CN107749149A CN107749149A CN201711056525.7A CN201711056525A CN107749149A CN 107749149 A CN107749149 A CN 107749149A CN 201711056525 A CN201711056525 A CN 201711056525A CN 107749149 A CN107749149 A CN 107749149A
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- China
- Prior art keywords
- battery
- positive pole
- transistor
- detection alarm
- toxic gas
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- 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
- G08B21/14—Toxic gas alarms
-
- 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
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- Toxicology (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Chemical & Material Sciences (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
- Emergency Alarm Devices (AREA)
Abstract
The invention discloses a kind of detection alarm for being used for flammable toxic gas in environment, including battery G1, gas sensor K1, speech chip U1, loudspeaker M1, the positive pole of the battery G1 is in series with switch S1, the positive pole of the battery G1 positive voltage terminal with gas sensor K1 respectively, speech chip U1 positive voltage terminal, loudspeaker M1 one end is connected, the positive pole of the battery G1 is also connected with gas sensor K1 A terminals, the negative voltage side of the gas sensor K1 is connected by resistance R1 with battery G1 negative pole, the negative pole of the battery G1 is connected to the ground, the B terminals of gas sensor K1 one end with slide rheostat RP1 respectively, electric capacity C1 one end, resistance R2 one end is connected.Non-processor of the present invention, is made up of analog circuit, too high in the flammable concentration of toxic gases of environment, sends alarm.
Description
Technical field
The present invention relates to electronic circuit technology field, and in particular to a kind of detection for being used for flammable toxic gas in environment
Alarm.
Background technology
In the production environment of industry or kitchen, flammable toxic gas easily be present, it is necessary to timely detect, with
Just user is reminded, is taken measures in time, ensures the body detection of user.At present, the detection means of toxic gas on the market, electricity
Road is complicated, and production cost is high, is not easy to produce in batches, limits its use range.
The content of the invention
The purpose of the present invention is to overcome the detection means of existing toxic gas, and circuit is complicated, and production cost is high, is not easy to
The problem of batch production.The detection alarm for being used for flammable toxic gas in environment of the present invention, non-processor, passes through simulation
Circuit is formed, too high in the flammable concentration of toxic gases of environment, when harmful to human is safe, sends alarm, and circuit is simple,
Easily realize, cost is cheap, is easy to produce in batches, extensive use, has a good application prospect.
In order to achieve the above object, the technical solution adopted in the present invention is：
A kind of detection alarm for being used for flammable toxic gas in environment, including battery G1, gas sensor K1, voice core
Piece U1, loudspeaker M1,
The positive pole of the battery G1 is in series with switch S1, the positive pole of the battery G1 positive electricity with gas sensor K1 respectively
Pressure side, speech chip U1 positive voltage terminal, loudspeaker M1 one end are connected, the positive pole of the battery G1 also with gas sensing
Device K1 A terminals are connected, and the negative voltage side of the gas sensor K1 is connected by resistance R1 with battery G1 negative pole,
The negative pole of the battery G1 is connected to the ground, the B terminals of the gas sensor K1 respectively with slide rheostat RP1 one
End, electric capacity C1 one end, resistance R2 one end are connected, the other end of the slide rheostat RP1 and diode D1 positive pole
It is connected, the negative pole of the diode D1 is connected to the ground, and for the other end of the electric capacity C1 with being connected, the resistance R2's is another
The base stage with transistor T1, electric capacity C2 positive pole are connected respectively for one end, and the negative pole of the electric capacity C2 is connected to the ground, the crystalline substance
Body pipe T1 colelctor electrode is connected with speech chip U1 control signal input, negative voltage side and the ground of the speech chip U1
It is connected, the control signal output of the speech chip U1 is connected with transistor T2 base stage, the collection of the transistor T2
Electrode is connected with the loudspeaker M1 other end, and the transistor T1, transistor T2 emitter stage are with being connected.
A kind of foregoing detection alarm for being used for flammable toxic gas in environment, the model of the gas sensor K1
For MQK-2 gas sensors.
A kind of foregoing detection alarm for being used for flammable toxic gas in environment, the positive pole of the battery G1 also with
Electric capacity C3 positive pole is connected, and the negative pole of the electric capacity C3 is connected to the ground.
A kind of foregoing detection alarm for being used for flammable toxic gas in environment, the model of the speech chip U1
KD9561 speech chips.
A kind of foregoing detection alarm for being used for flammable toxic gas in environment, the voltage of the battery G1 are
5V, the positive pole of the battery G1 are connected with voltage-regulator diode D2 negative pole, positive pole and the ground phase of the voltage-regulator diode D2
Connection.
A kind of foregoing detection alarm for being used for flammable toxic gas in environment, the power of the loudspeaker M1 are
8W。
A kind of foregoing detection alarm for being used for flammable toxic gas in environment, the transistor T1, transistor T2
It is NPN transistor.
The beneficial effects of the invention are as follows：The detection alarm for being used for flammable toxic gas in environment of the present invention, nowhere
Device is managed, is made up of analog circuit, it is too high in the flammable concentration of toxic gases of environment, when harmful to human is safe, send report
Alert sound, circuit is simple, easily realizes, cost is cheap, is easy to produce in batches, extensive use, has a good application prospect.
Brief description of the drawings
Fig. 1 is the structural representation of the detection alarm for being used for flammable toxic gas in environment of the present invention.
Embodiment
Below in conjunction with Figure of description, the present invention is further illustrated.
As shown in figure 1, the detection alarm for being used for flammable toxic gas in environment of the present invention, including battery G1,
Gas sensor K1, speech chip U1, loudspeaker M1,
The positive pole of the battery G1 is in series with switch S1, the positive pole of the battery G1 positive electricity with gas sensor K1 respectively
Pressure side, speech chip U1 positive voltage terminal, loudspeaker M1 one end are connected, the positive pole of the battery G1 also with gas sensing
Device K1 A terminals are connected, and the negative voltage side of the gas sensor K1 is connected by resistance R1 with battery G1 negative pole,
The negative pole of the battery G1 is connected to the ground, the B terminals of the gas sensor K1 respectively with slide rheostat RP1 one
End, electric capacity C1 one end, resistance R2 one end are connected, the other end of the slide rheostat RP1 and diode D1 positive pole
It is connected, the negative pole of the diode D1 is connected to the ground, and for the other end of the electric capacity C1 with being connected, the resistance R2's is another
The base stage with transistor T1, electric capacity C2 positive pole are connected respectively for one end, and the negative pole of the electric capacity C2 is connected to the ground, the crystalline substance
Body pipe T1 colelctor electrode is connected with speech chip U1 control signal input, negative voltage side and the ground of the speech chip U1
It is connected, the control signal output of the speech chip U1 is connected with transistor T2 base stage, the collection of the transistor T2
Electrode is connected with the loudspeaker M1 other end, and the transistor T1, transistor T2 emitter stage are with being connected.
Preferably, the model MQK-2 gas sensors of the gas sensor K1, cost is cheap, and detection sensitivity is high.
Preferably, positive pole of the positive pole of the battery G1 also with electric capacity C3 is connected, negative pole and the ground of the electric capacity C3
It is connected.
Preferably, the model KD9561 speech chips of the speech chip U1, cost is cheap, low in energy consumption, and can drive
Dynamic loudspeaker sends clear and melodious alarm.
Preferably, the voltage of the battery G1 is 5V, the positive pole of the battery G1 and voltage-regulator diode D2 negative pole
It is connected, the positive pole of the voltage-regulator diode D2 is connected to the ground, and improves the stability of voltage supply.
Preferably, the power of the loudspeaker M1 is 8W.
Preferably, the transistor T1, transistor T2 are NPN transistor.
The detection alarm for being used for flammable toxic gas in environment of the present invention, operation principle are as follows：Gas sensor
For K1 in home, the resistance at A, B both ends is very big, and transistor T1 cut-offs, speech chip U1 do not work, and whole circuit is in quiet
Only state；When gas sensor K touches flammable toxic gas, and concentration is excessive, A, B both ends resistance reduce rapidly, B ends
Current potential rise and to electric capacity C2 charge, when the charging potential on electric capacity C2 reach transistor T1 conducting current potential when, transistor T1
Conducting, speech chip U1 are obtained, output drive signal, transistor T2 conductings, so that loudspeaker M1 sends alarm；Work as environment
When middle flammable toxic gas reduces, whole circuit reset；Gas sensor K1 sensitivity, slide rheostat RP1 can be passed through
Regulation.
In summary, the detection alarm for being used for flammable toxic gas in environment of the invention, non-processor, passes through mould
Intend circuit to form, it is too high in the flammable concentration of toxic gases of environment, when harmful to human is safe, send alarm, circuit letter
It is single, easily realize, cost is cheap, is easy to produce in batches, extensive use, has a good application prospect.
General principle, the main features and advantages of the present invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, the original for simply illustrating the present invention described in above-described embodiment and specification
Reason, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (7)
- A kind of 1. detection alarm for being used for flammable toxic gas in environment, it is characterised in that：Passed including battery G1, air-sensitive Sensor K1, speech chip U1, loudspeaker M1,The positive pole of the battery G1 is in series with switch S1, the positive pole of the battery G1 positive electricity with gas sensor K1 respectively Pressure side, speech chip U1 positive voltage terminal, loudspeaker M1 one end are connected, the positive pole of the battery G1 also with gas sensing Device K1 A terminals are connected, and the negative voltage side of the gas sensor K1 is connected by resistance R1 with battery G1 negative pole, The negative pole of the battery G1 is connected to the ground, the B terminals of the gas sensor K1 respectively with slide rheostat RP1 one End, electric capacity C1 one end, resistance R2 one end are connected, the other end of the slide rheostat RP1 and diode D1 positive pole It is connected, the negative pole of the diode D1 is connected to the ground, and for the other end of the electric capacity C1 with being connected, the resistance R2's is another The base stage with transistor T1, electric capacity C2 positive pole are connected respectively for one end, and the negative pole of the electric capacity C2 is connected to the ground, the crystalline substance Body pipe T1 colelctor electrode is connected with speech chip U1 control signal input, negative voltage side and the ground of the speech chip U1 It is connected, the control signal output of the speech chip U1 is connected with transistor T2 base stage, the collection of the transistor T2 Electrode is connected with the loudspeaker M1 other end, and the transistor T1, transistor T2 emitter stage are with being connected.
- A kind of 2. detection alarm for being used for flammable toxic gas in environment according to claim 1, it is characterised in that： The model MQK-2 gas sensors of the gas sensor K1.
- A kind of 3. detection alarm for being used for flammable toxic gas in environment according to claim 1, it is characterised in that： Positive pole of the positive pole of the battery G1 also with electric capacity C3 is connected, and the negative pole of the electric capacity C3 is connected to the ground.
- A kind of 4. detection alarm for being used for flammable toxic gas in environment according to claim 1, it is characterised in that： The model KD9561 speech chips of the speech chip U1.
- A kind of 5. detection alarm for being used for flammable toxic gas in environment according to claim 3, it is characterised in that： The voltage of the battery G1 is 5V, and the positive pole of the battery G1 is connected with voltage-regulator diode D2 negative pole, the voltage stabilizing Diode D2 positive pole is connected to the ground.
- A kind of 6. detection alarm for being used for flammable toxic gas in environment according to claim 1, it is characterised in that： The power of the loudspeaker M1 is 8W.
- A kind of 7. detection alarm for being used for flammable toxic gas in environment according to claim 1, it is characterised in that： The transistor T1, transistor T2 are NPN transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711056525.7A CN107749149A (en) | 2017-11-01 | 2017-11-01 | A kind of detection alarm for being used for flammable toxic gas in environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711056525.7A CN107749149A (en) | 2017-11-01 | 2017-11-01 | A kind of detection alarm for being used for flammable toxic gas in environment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107749149A true CN107749149A (en) | 2018-03-02 |
Family
ID=61253428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711056525.7A Withdrawn CN107749149A (en) | 2017-11-01 | 2017-11-01 | A kind of detection alarm for being used for flammable toxic gas in environment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107749149A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110161180A (en) * | 2018-03-29 | 2019-08-23 | 浙江中越检测技术服务有限公司 | A kind of pH value detection warning circuit for chemical products |
| CN110164097A (en) * | 2018-03-29 | 2019-08-23 | 浙江中越检测技术服务有限公司 | Poisonous gas leakage detection circuit in a kind of chemical industry preparation process |
-
2017
- 2017-11-01 CN CN201711056525.7A patent/CN107749149A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110161180A (en) * | 2018-03-29 | 2019-08-23 | 浙江中越检测技术服务有限公司 | A kind of pH value detection warning circuit for chemical products |
| CN110164097A (en) * | 2018-03-29 | 2019-08-23 | 浙江中越检测技术服务有限公司 | Poisonous gas leakage detection circuit in a kind of chemical industry preparation process |
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| 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 | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20181211 Address after: Unit 337, B07 Floor, 199 Renai Road, Suzhou Industrial Park, Jiangsu Province, 215123 Applicant after: SUZHOU REMEDI ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD. Address before: 212011 No. 3 Tieta Road, Guyang Town, Dantu District, Zhenjiang City, Jiangsu Province Applicant before: Zhenjiang Nuobang Environmental Technology Co. Ltd. |
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| TA01 | Transfer of patent application right | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180302 |
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| WW01 | Invention patent application withdrawn after publication |