CN202442989U - Anaerobic alarm - Google Patents
Anaerobic alarm Download PDFInfo
- Publication number
- CN202442989U CN202442989U CN2012200671394U CN201220067139U CN202442989U CN 202442989 U CN202442989 U CN 202442989U CN 2012200671394 U CN2012200671394 U CN 2012200671394U CN 201220067139 U CN201220067139 U CN 201220067139U CN 202442989 U CN202442989 U CN 202442989U
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- alarm
- operational amplifier
- amplifier
- comparer
- acoustical generator
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Abstract
The utility model relates to an anaerobic alarm which comprises a power supply, an oxygen transducer, a measurement amplifier, a comparator and an acoustical generator, wherein the oxygen transducer, the measurement amplifier, the comparator and the acoustical generator are sequentially connected in parallel, and the measurement amplifier, the comparator and the acoustical generator are all connected with the power supply. The anaerobic alarm is simple in circuit, low in manufacture cost and convenient to carry and can detect and monitor oxygen concentration of surrounding. When being in an anaerobic environment, the anaerobic alarm can control a buzzer in the acoustical generator to work and alarm, and once the anaerobic alarm leaves the anaerobic environment, the anaerobic alarm can automatically control the buzzer to be disconnected with the power supply and stop alarming. The anaerobic alarm can automatically alarm to remind people to be far away from danger according to the oxygen concentration variation of the surrounding.
Description
Technical field
The utility model relates to a kind of anoxic alarm.
Background technology
Anoxic is to influence one of healthy major reason of people.In a lot of occasions, anoxic can also cause the generation of accident.For example, when fire generation or burning object were arranged, people on every side tend to suffocate because anoxic produces; People are in long-time airless indoor and deep-well and the mine, also can occur taking place the situation of anoxic often.People are if be in the anaerobic environment, and it is unable gently then can to show as dizziness, headache, tinnitus, dim eyesight or tetraparesis, heavy then may have difficulty in breathing, heartbeat stops even the consequence of death by suffocation.
The patent No. is that the Chinese utility model patent of ZL200720039858.4 discloses a kind of environmental hypoxia monitoring alarm, and it comprises oxygen concentration sensor, signal amplifier and comparer.The oxygen concentration sensor of this environmental hypoxia monitoring alarm is selected aeration cell for use, and signal amplifier is selected the INA122PA instrument amplifier for use.Wherein, the signal output part of aeration cell connects the signal input part of INA122PA instrument amplifier, and an input end of comparer connects output termination, another input termination comparison signal of INA122PA instrument amplifier, output terminal output control signal.The utility of oxygen used in the automotive industry as an oxygen sensor cell, and preclude the use of instrumentation amplifier as an oxygen cell output signal amplifier can detect the oxygen concentration of oxygen in the environment, for oxygen alarm.But because choosing of this environmental hypoxia monitoring alarm designed circuit and components and parts causes its volume bigger, be inconvenient to carry, usable range is narrow.
The utility model content
The purpose of the utility model is a design anoxic alarm, can fast detect oxygen content delicately, under the situation of anoxic, give the alarm, and circuit is simple, cheap, is convenient for carrying, applied widely.
For realizing above-mentioned purpose, the utility model is realized through following technical scheme: the anoxic alarm comprises power supply, oxygen sensor, measuring amplifier, comparer and acoustical generator; Oxygen sensor, measuring amplifier, comparer and acoustical generator are connected successively, and measuring amplifier, comparer and acoustical generator all are connected with power supply.
Preferably, measuring amplifier comprises operational amplifier and related resistors.Oxygen sensor concatenation operation amplifier, operational amplifier connects resistance.
Preferably, operational amplifier connects power supply.
Preferably, comparer comprises operational amplifier and potentiometer.Its operational amplifier connects potentiometer, measuring amplifier and acoustical generator.
Preferably, operational amplifier is connected power supply with potentiometer.
Preferably, acoustical generator comprises hummer, relay and triode.Hummer connects the normally opened contact of relay, and triode is connected with comparer with relay.
Preferably, triode, relay and normally opened contact thereof all are connected with power supply, and hummer is connected with power supply through resistance.
Preferably, operational amplifier is a dual operational amplifier.
This hypoxia sensor adopts oxygen sensor to detect airborne oxygen concentration.When airborne oxygen concentration is 21% (normal value), oxygen sensor can export-voltage about 40mV; When airborne oxygen content be reduced to normal value 50% the time, lambda sensor can export-voltage about 20mV.Oxygen sensor can be selected the KE-50 type for use.
Oxygen sensor can export-and 20mV is to the signal that changes slowly of-40mV, and signal is added in the measuring amplifier amplifies.The measuring amplifier of hypoxia sensor comprises operational amplifier and related resistors.This measuring amplifier has-100 times enlargement factor, and better inhibited common mode interference ability is arranged.One of its effect is to be entered into comparer after amplifying the signal of oxygen sensor output, two be to amplify the both-end input signal of lambda sensor to convert single-ended output signal into and export.Signal after measuring amplifier amplifies is about 2V to 4V.When airborne oxygen concentration was lower than 19.5% in the normal air, measuring amplifier output signal was about 3.7V.
Comparer comprises by operational amplifier and potentiometer.The threshold voltage of comparer is set by potentiometer, and it is set to about 3.7V.Measuring amplifier inputs to voltage in the operational amplifier of comparer, and when its input voltage was lower than 3.7V, upset and output high level took place comparer; When its input voltage was higher than 3.7V, comparer is output low level then.
Acoustical generator comprises hummer, relay and triode; Comparer can input to voltage in the triode of acoustical generator.Triode conducting when comparer output high level, the relay that is connected with triode gets electric, and then makes it open the electric shock adhesive, the hummer conducting work of connecting with normally opened contact.Triode ends during the comparer output low level, and the relay electric-loss that is connected with triode is failure to actuate, so it opens and get an electric shock to keep normally open, and the hummer of connecting with normally opened contact also keeps off state.
The technical scheme of the anoxic alarm of the utility model comprises the combination in any that above-mentioned various features constitutes.
The anoxic alarm that the utility model provides mainly is made up of power supply, oxygen sensor, measuring amplifier, comparer and acoustical generator, and this design circuit is simple, cheap.This anoxic alarm is easy to carry, at any time the oxygen concentration of surrounding being monitored.When the anoxic alarm is in the anaerobic environment, can control the hummer work warning in the acoustical generator; In case the anoxic alarm leaves anaerobic environment, it can be controlled hummer and power supply disconnection automatically and stop to report to the police.This anoxic alarm can change automatic warning reminding people according to the oxygen concentration of surrounding environment away from danger.The utility model is simple in structure, and is highly sensitive, with low cost, also can be used as family and uses.
Description of drawings
Fig. 1 is the circuit block diagram of preferred embodiment of the anoxic alarm of the utility model.
Fig. 2 is the circuit diagram of the preferred embodiment of anoxic alarm shown in Figure 1.
Embodiment
With reference to shown in Figure 1, the anoxic alarm of the utility model comprises power supply, oxygen sensor, measuring amplifier, comparer and acoustical generator.Wherein, oxygen sensor, measuring amplifier, comparer and acoustical generator are connected successively, and measuring amplifier, comparer and acoustical generator all are connected with power supply.
With reference to shown in Figure 2, measuring amplifier comprises operational amplifier IC1-1, IC1-2 and IC2-1 and related resistors, and comparer comprises operational amplifier IC2-2 and potentiometer W, and acoustical generator comprises hummer L, relay K and triode T.The in-phase input end of oxygen sensor concatenation operation amplifier IC1-1 and IC1-2, resistance R 1, R2, R3 are connected in series.The inverting input of operational amplifier IC1-2 is connected between resistance R 1 and the R2, and the inverting input of operational amplifier IC1-1 is connected between resistance R 2 and the R3.The output terminal of operational amplifier IC1-2, resistance R 4, R6 are connected in series, and resistance R 1 is connected between the output terminal and resistance R 4 of operational amplifier IC1-2.The output terminal of operational amplifier IC1-1, resistance R 5, R7 are connected in series, and resistance R 3 is connected between the output terminal and resistance R 5 of operational amplifier IC1-1.The reversed-phase output of operational amplifier IC2-1 is connected between resistance R 4 and the R5, and normal phase input end is connected between resistance R 5 and the R7.The positive output end of the operational amplifier IC2-2 of comparer is through the output terminal of resistance concatenation operation amplifier IC2-1, and reversed-phase output connects potentiometer W through resistance, and output terminal connects triode T through resistance.The normally opened contact K1 of the connection relay K of hummer L.Relay K connects the collector of triode T.Supply voltage is 9V.4 pin of operational amplifier IC1-1,4 pin of IC2-1, the emitter of potentiometer W and triode T all is connected power cathode; 8 pin of operational amplifier IC1-2,8 pin of IC2-2, potentiometer W is connected positive source with relay K and normally opened contact K1 thereof.
The main measuring amplifier of being made up of operational amplifier IC1-1, IC1-2 and IC2-1 has good restraining common mode interference ability, can also the both-end input signal be amplified to convert single-ended output signal into.Oxygen sensor is added to two-way-20mV in the measuring amplifier to the signal that changes slowly of-40mV and amplifies, and the enlargement factor of measuring amplifier is decided by the ratio of the resistance of its related resistors, and formula is A
f=-R6/R4 (1+2R1/R2), the enlargement factor of the circuit design of present embodiment is-100 times.The about 2V to 4V of signal after measuring amplifier amplifies, this signal is added to the input end of comparer.The thresholding of comparer is set by potentiometer W; Because when airborne oxygen concentration is lower than 19.5% in the normal air (this concentration is anoxic concentration); The signal of the operational amplifier IC2-1 output in the measuring amplifier is approximately about 3.7V, so the threshold voltage of the circuit setting of present embodiment is 3.7V.When the anoxic alarm is in the anaerobic environment; When the output signal of the operational amplifier IC2-1 of its measuring amplifier is lower than 3.7V; The operational amplifier IC2-2 of comparer overturns, exports high level; Triode T obtains the high level conducting, makes relay K get normally opened contact K1 adhesive electric, relay, the hummer L sounding of switching on.When the anoxic alarm is in the environment of normal oxygen content; The voltage signal of the operational amplifier IC2-1 output of its measuring amplifier is higher than 3.7V; And then the operational amplifier IC2-2 output low level of comparer; Triode T is by not conducting, and the relay K dead electricity is failure to actuate, its normally opened contact K1 keeps normally open, and hummer L keeps opening circuit not sounding.
Element among Fig. 2 can be selected following type: oxygen sensor is selected the KE-50 type for use; Operational amplifier IC1-1, IC1-2, IC2-1 and IC2-2 select LM358 type dual operational amplifier for use; Triode T selects the 3DG6C type for use, and diode D selects the IN4001 type for use; The resistance of resistance R 6 and R7 is 100k Ω, and the resistance of R4 and R5 is 50 k Ω, and the resistance of R1 and R3 is 100 k Ω, and the resistance of R2 is 2k Ω, and the resistance of R8 is 10 k Ω, and the resistance of R9 is 10 k Ω, and the resistance of R10 is 510 Ω, and the resistance of R11 is 1k Ω; The resistance of potentiometer W is 510 k Ω; Relay K is selected JRX-13F type 12V DC relay for use; It is 6V's that hummer is selected rated voltage for use.Supply voltage is 9V.
The above only is the preferred embodiment of the utility model; Be not that the utility model is done any pro forma restriction; Every technical spirit according to the utility model all still belongs in the scope of the utility model technical scheme any simple modification, equivalent variations and modification that above embodiment did.
After having read this instructions; Those skilled in the art are not difficult to find out; The utility model is made up of the combination of prior art; Some has given detailed description at this prior art of the each several part of these formation the utility model, and some then concisely considers not give unnecessary details to all matters, big and small from instructions, but those skilled in the art just know institute's cloud after having read instructions.And those skilled in the art also are not difficult to find out, are to be full of a large amount of creative works for constituting the utility model to the combination of these prior aries, are the crystallizations of inventor's theoretical analysis and a large amount of experiments for many years.Those skilled in the art can find out from instructions that equally each technical scheme that is disclosed and the combination in any of each characteristic all belong to the part of the utility model here.
Claims (10)
1. anoxic alarm; Comprise power supply, oxygen sensor, measuring amplifier, comparer and acoustical generator; It is characterized in that: oxygen sensor, measuring amplifier, comparer and acoustical generator are connected successively, and measuring amplifier, comparer and acoustical generator all are connected with power supply.
2. anoxic alarm as claimed in claim 1 is characterized in that: measuring amplifier comprises operational amplifier and related resistors; Oxygen sensor concatenation operation amplifier, operational amplifier connects resistance.
3. according to claim 1 or claim 2 anoxic alarm, it is characterized in that: comparer comprises operational amplifier and potentiometer; Its operational amplifier connects potentiometer, measuring amplifier and acoustical generator.
4. according to claim 1 or claim 2 anoxic alarm, it is characterized in that: acoustical generator comprises hummer, relay and triode; Hummer connects the normally opened contact of relay, and triode is connected with comparer with relay.
5. anoxic alarm as claimed in claim 3 is characterized in that: acoustical generator comprises hummer, relay and triode;
Hummer connects the normally opened contact of relay, and triode is connected with comparer with relay.
6. anoxic alarm as claimed in claim 2 is characterized in that: operational amplifier connects power supply.
7. anoxic alarm as claimed in claim 3 is characterized in that: operational amplifier is connected power supply with potentiometer.
8. anoxic alarm as claimed in claim 4 is characterized in that: triode, relay and normally opened contact thereof all are connected with power supply, and hummer is connected with power supply through resistance.
9. like claim 2 or 6 described anoxic alarms, it is characterized in that: operational amplifier is a dual operational amplifier.
10. anoxic alarm as claimed in claim 3 is characterized in that: operational amplifier is a dual operational amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200671394U CN202442989U (en) | 2012-02-28 | 2012-02-28 | Anaerobic alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200671394U CN202442989U (en) | 2012-02-28 | 2012-02-28 | Anaerobic alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202442989U true CN202442989U (en) | 2012-09-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200671394U Expired - Fee Related CN202442989U (en) | 2012-02-28 | 2012-02-28 | Anaerobic alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202442989U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105805406A (en) * | 2016-05-28 | 2016-07-27 | 许昌东方热力有限公司 | Concentrated heating energy-saving temperature control valve |
-
2012
- 2012-02-28 CN CN2012200671394U patent/CN202442989U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105805406A (en) * | 2016-05-28 | 2016-07-27 | 许昌东方热力有限公司 | Concentrated heating energy-saving temperature control valve |
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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: 20120919 Termination date: 20140228 |