CN2296531Y

CN2296531Y - Voice alarm for gas leakage

Info

Publication number: CN2296531Y
Application number: CN 97209638
Authority: CN
Inventors: 杨军; 尚定刚
Original assignee: SHENGYANGSHENG INDUSTRIAL DEVELOPMENT Co Ltd SHENZHEN
Current assignee: SHENGYANGSHENG INDUSTRIAL DEVELOPMENT Co Ltd SHENZHEN
Priority date: 1997-01-25
Filing date: 1997-01-25
Publication date: 1998-11-04
Anticipated expiration: 2007-01-25

Abstract

The utility model relates to a voice alarm for gas leakage, which comprises an outer shell 10, a power circuit 20, a signal acquisition circuit 30, a delaying control circuit 40, a driving control circuit 50, and an alarm circuit 60. The utility model is characterized in that the voice alarm comprises a speech segmentation triggering circuit 70. The outer shell of the alarm forms an orbicular-ovate shape, and the end with the minor radius of the outer shell is provided with a gas sensing chamber 11, the upper part of which is provided with a detachable protective cap 12. The utility model can alarm users with clear and definite voice to take measures when gas leakage is generated, and has the characteristics of small size, low power consumption, beautiful appearance, etc.

Description

The gas leakage phonetic alarm

The utility model relates to a kind of alarm, particularly relates to a kind of gas leakage phonetic alarm that can carry out audio alert to gas leakage.

At present, coal gas and liquefied gas have become the indispensable energy in people's life.Along with being extensive use of of coal gas, liquefied gas because the combustion gas inherent instability, or because miscarriage, or since when carrying and storing the pipeline of combustion gas or equipment regular meeting cause gas leakage, cause the gas leakage accident to satisfy the step and increase.Therefore, constantly release various gas leakage alarm products in recent years on the market, as various gas leakage detectors and Fuel Gas Leak Alarm, its type of alarm all employing sound, light is reported to the police, alarm sound generally then adopts alarm bell or audio oscillation mode, be many with the audio oscillation type of alarm especially wherein, as family expenses, vehicle anti-theft device, the communication beeper, toy for children, doorbell etc., but the defective of above-mentioned warning product is to make often the user to be difficult to differentiate the warning reason, and the lighter causes and nervous misunderstands, and is heavy then cause delay and bring heavy losses.

The purpose of this utility model is to overcome the deficiency of existing gas leakage alarm product, and provide a kind of both had sound, the light warning function, the gas leakage phonetic alarm that can when gas leakage, tell the emergency measure that the user should take again with clear, clear and definite speech form; It is little, low in energy consumption, handsome in appearance that the purpose of this utility model also is to make this phonetic alarm to have a volume, is fit to the characteristics of Modern Family's consumption temperament and interest.

The purpose of this utility model can realize by following technical solution: the utility model comprises shell 10, power circuit 20, signal acquisition circuit 30, delay control circuit 40, Drive and Control Circuit 50, reaches warning circuit 60, main points of the present utility model are to be provided with voice segment trigger circuit 70, body case of annunciator 10 is oval, minor radius end at shell is provided with air-sensitive chamber 11, and removable jew protecting cover 12 is equipped with on top, air-sensitive chamber.

Above-mentioned speech trigger circuit is two sections speech trigger circuit, first section integrated circuit (IC) 1 that comprises adjustment and output alarm signal, diode D6 that links to each other with the IC1 output terminal and speech IC IC2; Second section comprises that the time-delay be made up of resistance R 18, diode D7 and transistor N1 adjusts circuit 71, the single-pole double-throw switch (SPDT) circuit 72 and charging capacitor C7 and the speech IC IC2 that are made up of photoelectric coupling circuit Q1, Q2, bypass resistance R13, R14, R15, diode D8 and transistor N1.

Be provided with the shunting platform 101 with the shell one in the described air-sensitive chamber 11, have hole 103 on the dividing plate 102 of air-sensitive chamber and alarm inner chamber, be contained in gas sensor 31 (LQ) on the wiring board in the air-sensitive chamber is stretched in the air-sensitive hole.

Have pore 122 on the described protecting cover 12.

Above-mentioned power circuit, signal acquisition circuit, delay control circuit, Drive and Control Circuit and warning circuit adopt the circuit similar to custom circuit.

Be described below below in conjunction with block diagram 2 and 3 pairs of circuit theories of the present utility model of electrical schematic diagram:

As Fig. 1, shown in Figure 3, when gas leakage took place, the combustion gas suction inlet 121 of combustion gas on protecting cover entered in the air-sensitive chamber 11, and discharge from the pore of protecting cover both sides at last shunting platform 101 both sides in the air-sensitive of flowing through the then chamber.After the gas sensor 31 (LQ) that is positioned at the air-sensitive chamber collects the gas sample, by B1 direct current bridge circuit 3 ends after C1 filtering, cross D2, D3 step-down again by the W1 voltage stabilizing, the dependent sensor 31 work filament electricity consumptions of supplying gas, R5, C2, W2 provide the gas sensor test potential, and the temperature collection circuit of being made up of R10, R11, RT and RV2 31 send drive controlling: and send integrated circuit (IC) 1 by the gas sample acquisition circuit 32 that LQ, R9, RV1 and W5 form.Divide two-way by the adjustment alerting signal that integrated circuit (IC) 1 four two input end Sheffer stroke gates 4,8 foots are sent here through the D6 orientation: the one tunnel through transistor N3 first section speech trigger end of 10 foots to speech IC IC2, IC2 starting of oscillation work is by 7 sufficient output audio signals, deliver to power amplifier integrate circuit IC3 tripodia through D12, R12, C9, after IC3 amplifies, send continual audio alert sound by loudspeaker S2: " gas leakage! A fire prevention! A door window! ".Meanwhile, the audio oscillator signal of adjusting through IC1 the 10th foot is after amplifying by transistor N2, by hummer S1 sounding (this function also can).The hummer sounding simultaneously, and is luminous by the light emitting diode L3 flicker that is connected to IC2 the 1st foot.If integrated circuit (IC) 1 the 4th, 8 sufficient alerting signals do not disappear, first section voice and buzzer warning sound will continue repeatedly.Circuit 71 adjustment of delaying time is adjusted in the time-delay that another road alerting signal is formed through R18, D7 and transistor N1.The single-pole double-throw switch (SPDT) circuit of forming by photoelectric coupling circuit Q1, Q2 and R13, R14, R15, D8, N1 72 when the base stage of transistor N1 has alerting signal, the collector and emitter conducting, electric current is through current-limiting resistance R13, cross Q1 through R15 to N1.Q1 work this moment, the conducting of Q1 output terminal, C7 gets electric, is in charged state; Meanwhile, because transistor N1 conducting is the current potential reduction of Q2 power supply through R14, Q2 quits work, second section speech trigger end of Q2 output terminal and speech IC IC2 the 11st foot open circuit, this state is maintained to alerting signal to be finished, and the N1 base stage is till the electronegative potential.In case leakage accident is got rid of, alerting signal disappears, and 4,8 foots of IC1 become electronegative potentials, and first section voice and hummer quit work, and sound circuit can be told the user simultaneously: " fault is got rid of, and Thanks for Your Cooperation ".When the N1 base stage is in electronegative potential, N1 is by quitting work, and Q1 input end no current flows through, and output terminal and electric power disconnection, C7 stop charging.Meanwhile R14 is in noble potential, and Q2 starts working, the conducting of Q2 output terminal, and second section sound circuit of C7 and IC2,11 foots are connected.Storage capacitor C7 triggers 11 foot discharges, makes one to three pronunciation cycle of second section sound circuit work.The length in this section pronunciation cycle depends on the amount of capacity of C7.The driving circuit of being made up of SCR, D4, D5, P1, P2, L1 and R26 then is to cut out the gas pipeline electromagnetic valve and open the exhaust fan electricity consumption for providing.If after report to the police eliminating, do not touch by switch AN circuit and switch on always, until the maintenance personal show up reset till.

The utility model is owing to be provided with voice alarm circuit, and carried out staging treating on voice are provided with, and therefore can be referred to as intelligent phonetic alarm.The corresponding measure that audio alert notifies the user should take at the critical moment with more directly perceived, proper speech form prevents the user better owing to be in the scene of the accident, and is nervous, if the improper generation that steps up accident on the contrary of treatment measures.Get rid of when danger, can tell the user with voice again, thereby the user is felt relieved.Segmentation voice of the present utility model also are used for the audio alert of environment overtemperature, prevent from that family's combustion gas from forgetting to close fire, and the unmanned calamity of easily getting angry of environment, gas sensor can't be judged the moment of danger.Another characteristics of the present utility model are at structure and apparent intention, and outward appearance adopts oval, and is handsome in appearance, have catered to current family and overall situation and have asked and close humorous temperament and interest.The utility model is designed to the air-sensitive chamber can carry out automatically the air duct of heat interchange, thereby guaranteed that the gas sample acquisition district utilizes hot-air to rise, the principle that new air is filled up, the gas than in the enforceable slightly collection environment of natural diffusion way improves the warning sensitivity of product greatly.Advantages such as the utility model also has small and exquisite, light, and is reliable, durable.

Fig. 1 is a profile synoptic diagram of the present utility model.

Fig. 2 is a circuit block diagram of the present utility model

Fig. 3 is an electrical schematic diagram of the present utility model.

Provide embodiment of the present utility model below in conjunction with accompanying drawing.

As shown in Figure 1 and Figure 2, the utility model comprises shell 10, power circuit 20, signal acquisition circuit 30, delay control circuit 40, Drive and Control Circuit 50 and warning circuit 60, and the main points of the present invention on circuit also are to be provided with voice segment trigger circuit 70.Shell 10 of the present utility model as shown in Figure 1, it is oval, the minor radius end of its shell is provided with air-sensitive chamber 11, is provided with the shunting platform 101 with the shell one in the air-sensitive chamber, the shunting platform is arcuation, and the combustion gas that enters the air-sensitive chamber can be discharged to the both sides shunting.Air-sensitive chamber and alarm inner chamber separate by shunting platform 101 and dividing plate 102, have hole 103 on the dividing plate 102, are contained in gas sensor 31 on the wiring board in the air-sensitive chamber is stretched in hole 103, enter gas in the air-sensitive chamber with collection.Removable jew protecting cover 12 is equipped with on top, air-sensitive chamber, has pore 122 on the protecting cover, and protecting cover one end is provided with grab 121, protecting cover can be linked to each other with shell in the hole 104 on the grab insertion shell.When needs maintenance gas sensor and complete machine adjustment, press protecting cover with light finger, it can be unloaded.Wiring board with foregoing circuit is housed on the alarm inner bottom plating.Being constructed as follows of the power circuit 20 that present embodiment adopted, signal acquisition circuit 30, delay control circuit 40, Drive and Control Circuit 50 and warning circuit 60:

As shown in Figure 3, described power circuit 20 comprise transformer T1, resistance R 1,, full-wave rectification bridge circuit B1, B2 and capacitor C 1.

Described signal acquisition circuit 30 comprises temperature collection circuit 31, gas sample acquisition circuit 32, signal output apparatus 33 and power-supplying circuit 34.Wherein temperature collection circuit comprises resistance R 10, R11, positive temperature platinum resistance RT and potentiometer RV2; The gas sample acquisition circuit comprises gas-sensitive head LQ, resistance R 9, potentiometer RV1 and stabilivolt W5; Signal output apparatus comprises stabilivolt W5 and diode D4; Power-supplying circuit comprises diode D2, D3, stabilivolt W1, W2, capacitor C 2 and resistance R 5.

Described delay control circuit 40 comprises integrated circuit (IC) 1, diode D1, capacitor C 3, C5 and resistance R 6, R7, R8.

Described Drive and Control Circuit 50 comprises controllable silicon SCR, diode D4, D5, lead-out terminal P1, P2, light emitting diode L1 and resistance R 26 and normally closed push button switch AN.

Described warning circuit 60 comprises IC2, IC3, N2 and bypass.

The set voice segment trigger circuit 70 of the utility model are two sections speech trigger circuit.First section comprises diode D6 and transistor N3 and the speech IC IC2 that links to each other with integrated circuit (IC) 1 output terminal.Integrated circuit (IC) 1 and IC2 bear adjustment and output alarm signal respectively and send audio alert.IC1 the 1st, 2 foots are the input end of IC1, and wherein first foot links to each other with the anode of capacitor C 3 with diode D1, and second foot links to each other with signal acquisition circuit output W5 anode.Output terminal 4,8 foots of IC1 connect the input end of first and second section sound circuit.Second section comprises that the time-delay that is formed by resistance R 18, diode D7 and transistor N1 serial connection adjusts circuit 71, the single-pole double-throw switch (SPDT) circuit 72 and charging capacitor C7 and the speech IC IC2 that are made up of photoelectric coupling circuit Q1, Q2, bypass resistance R13, R14, R15, diode D8 and transistor N1.Second section speech trigger end of 11 foots of the output termination integrated circuit (IC) 2 of said switching circuit 72.And output terminal the 7th foot of IC2 links to each other with power amplifier integrate circuit IC3 input end the 3rd foot by D12, R12, C9, and signal is delivered to the loudspeaker pronunciation by its 5th foot channel capacitor C 11 after IC3 amplifies.Sound, light are reported to the police and to be born respectively by IC1, IC2, and acoustic alarm is adjusted capacitor C 5 output audio signals by the resistance R 8, the R7 that are connected to IC1 the 8th, 9 foots and the audio frequency that is connected to IC1 the 10th foot, send hummer S1 sounding after amplifying through R22 and by transistor N2.Light is reported to the police luminous by the light emitting diode L3 that is connected to IC2 first foot.

Claims

1. gas leakage phonetic alarm, comprise shell (10), power circuit (20), signal acquisition circuit (30), delay control circuit (40), Drive and Control Circuit (50) and warning circuit (60), it is characterized in that being provided with voice segment trigger circuit (70), body case of annunciator (10) is oval, minor radius end at shell is provided with air-sensitive chamber (11), and removable jew protecting cover (12) is equipped with on top, air-sensitive chamber.

2. gas leakage phonetic alarm according to claim 1, it is characterized in that described voice segment trigger circuit (70) are two sections speech trigger circuit, first section integrated circuit (IC) 1 that comprises adjustment and output alarm signal, diode D6 that links to each other with the IC1 output terminal and speech IC IC2; Second section comprises that the time-delay be made up of resistance R 18, diode D7 and transistor N1 adjusts circuit (71), the single-pole double-throw switch (SPDT) circuit (72) and charging capacitor C7 and the speech IC IC2 that are made up of photoelectric coupling circuit Q1, Q2, bypass resistance R13, R14, R15, diode D8 and transistor N1.

3. gas leakage phonetic alarm according to claim 2, it is characterized in that being provided with in the described air-sensitive chamber (11) shunting platform (101) with the shell one, have hole (103) on the dividing plate of air-sensitive chamber and alarm inner chamber (102), the gas sensor (31) that is contained on the wiring board (LQ) stretches in the air-sensitive chamber through hole (103).

4. gas leakage phonetic alarm according to claim 1 is characterized in that having on the described protecting cover (12) pore (122).