CN2193570Y

CN2193570Y - Flashing signal alarm

Info

Publication number: CN2193570Y
Application number: CN 93217990
Authority: CN
Inventors: 夏长涛
Original assignee: Daqing Petrochemical Design Institute
Current assignee: China Huanqiu Contracting and Engineering Corp
Priority date: 1993-07-13
Filing date: 1993-07-13
Publication date: 1995-03-29
Anticipated expiration: 2003-07-13

Abstract

The utility model relates to a flashing signal alarm, which is composed of an outside connected switch contact unit 1, a flashing unit 4, a sound unit 5, an oscillating unit 2 and a limit values detection unit 3. When the switch S of the outside connected switch contact is closed, the flashing signal alarm can generate flashing and discontinuous alarm sound. After the flashing and the alarm sound are delayed for a period of time, the alarm sound is stopped and the alarm lamp is changed into always lighting mode until the switch S is turned off. The utility model is also provided with a test button and a confirming button. The utility model has the advantages of simple circuit, easy production and use.

Description

Flashing signal alarm

The application relates to a kind of alarm, and more particularly, it relates to a kind of flashing signal alarm.

Present flashing signal alarm generally all exists the circuit complexity, and power consumption is big, does not automatically confirm function, with and cost higher.

The purpose of this utility model is, provides a kind of circuit simple, and cost flash alarm low and that have an automatic affirmation function is removed the trouble that operating personnel frequently press ACK button from, and simultaneously, this alarm can also provide the function of alarm sound at the warning initial stage.

Flashing signal alarm of the present utility model comprises the outside connected switch contact point unit, and flashing light unit and acoustics unit is characterized in that it also comprises an oscillating unit that is used for providing to described flashing light unit and described acoustics unit oscillation pulse signal; A ultimate value detecting unit that is connected with described oscillating unit with described outside connected switch contact point unit respectively, it delivers to described flashing light unit and described acoustics unit to the signal that described oscillating unit produces respectively according to from the detected signal in described outside connected switch contact.

Because the utility model alarm is by the outside connected switch contact point unit, flashing light unit, acoustics unit and oscillating unit, the ultimate value detecting unit is formed, and its circuit is simple, is easy to make and use, when the switch S of external contact was closed, this alarm can produce flash of light, and the alarm sound that continues, after a delay, alarm sound stops, and alarm lamp changes Chang Liang into, disconnect up to switch S, the utility model alarm also has test and ACK button, and automatic affirmation function is arranged, and power consumption is little.

Below in conjunction with accompanying drawing flashing signal alarm of the present utility model is done to describe further.

Fig. 1 is the frame principle figure that reflects this flashing signal alarm on the whole.

Fig. 2 is the physical circuit figure of this flashing signal alarm.

Referring to Fig. 1, it shows a block scheme that reflects this flashing signal alarm on the whole.Wherein outside connected switch contact point unit 1 is delivered to ultimate value detecting unit 3 with switching signal.This ultimate value detecting unit 3 according to detected switching signal through logic control, delivering to flashing light unit 4 and acoustics unit 5 respectively, with the alerting signal of the sound that produces flash of light and be interrupted by the continual oscillator signal of oscillating unit 2.

Referring to Fig. 2, it shows the physical circuit figure of this flashing signal alarm, and wherein the each several part correspondence of ticking with dotted line each unit among Fig. 1.Can learn that from Fig. 2 outside connected switch contact 1 comprises a switch contact S who is used to report to the police, and one with itself and the pushbutton switch 1AN that is used to test this alarm that connects, their end and power vd D join, and the output of next unit is delivered in other end conduct.Oscillating unit 2 comprises by non-conjunction G4, G5, resistance R 3, the free-running multivibrator that R4 and capacitor C 2 are formed.The frequency of the impulse oscillation signal that it is exported can be selected at 1-3 time/second the interior of scope.Ultimate value detecting unit 3 comprises one by resistance R 1, the II shape circuit that capacitor C 1 and resistance R 2 formed and by non-conjunction G1, the logical circuit that G3 and " with door " G2 constitute.Simultaneously at resistance R 2 two ends also cross-over connection have one to be used for alerting signal is confirmed, acoustics unit 5 quit work and make the pushbutton switch 2AN of flasher circuit Chang Liang.This ultimate value detecting unit 3 receives respectively from the switching signal of outside connected switch contact point unit 1 and from the uninterrupted oscillator signal of oscillating unit, the output of this unit 3 simultaneously, and one the road delivers to flashing light unit 4, and one the road delivers to acoustics unit 5.Its flashing light unit 4 comprises one by resistance R 5, an amplifying circuit that transistor T 1 is formed and a light emitting diode D who is connected in series at its collector forward.And acoustics unit 5 comprises one by resistance R 6, and the amplifying circuit that transistor T 2 is formed is serially connected with a relay J in the collector of transistor T 2, and its contact J-1 is controlling a break-make that is serially connected in the hummer between power vd D and the ground.In addition, although among the figure not the power supply to each unit be described, obviously, the power supply of each unit and logic gate is that those of ordinary skills are to understand.

In use, oscillating unit 2 provides signal to the input end of non-conjunction G1 incessantly.When extraneous contact S was closed, power vd D was to capacitor C 1 charging, and then A point and B point are high level " 1 ", owing to the B point is another input end of non-conjunction G1, so non-conjunction G at this moment ₁With outputting

oscillation signal

0,1,0,1 ..." with door " G ₂An input receive the oscillator signal of non-conjunction G1 output, another input is connected to A point high level " 1 ", oscillator signal will make flashing light unit work like this, the diode D signal that flashes.The oscillator signal of non-conjunction G1 output simultaneously is sent to non-conjunction G3, and like this, this oscillator signal is added to acoustics unit 5 after anti-phase, and the then relay J adhesive in the acoustics unit 5 discharges adhesive ..., send the interruption sound to cause hummer DD.

Along with the carrying out of capacitor C1 charging, the reduction of B point current potential, i.e. level "0", this makes non-conjunction G1 can only continue to export high level " 1 ".Anti-phase through non-conjunction G3 like this, the level "0" of its output will be closed the work of acoustics unit 5.Dodge the transistor T 1 long-term conducting of closing unit 4 and " with door " G2 two input ends at this moment are high level " 1 " so its makes, diode D is with Chang Liang.

Switch contact S at this flashing signal alarm disconnects back (or at not closed state), and A point current potential will be level "0".Therefore, " with door " 2 can only be exported level "0", and flashing light unit 4 is quit work.

Flashing light unit 4 and acoustics unit 5 have just all stopped work like this, and remain static, and are waiting for next time and reporting to the police.

Being confirmed to be automatically by resistance R 2 of this alarm realizes that this depends on the value of capacitor C 1 and resistance R 2 in addition.When contact switch S is just closed, press ACK button switch 2AN, then acoustics unit 5 quits work immediately, promptly stops sounding, and the light emitting diode D of flashing light unit 4 will no longer glisten and change Chang Liang into.This state will be maintained to contact switch S and disconnect.And reached the affirmation purpose.If cancellation resistance R 2 will lose automatic affirmation function.

About the function of test pushbutton switch 1AN in the contact switch unit, in fact only be used to detect the testing button that can this alarm operate as normal.When the people when pressing this switch 1AN, its course of work is the same with alarm procedure in the above-mentioned work.But it is if working properly then represent this alarm operate as normal.

The pushbutton switch 1AN of this flashing signal alarm and 2AN are from the homing position type pushbutton switch.Its logic gate G1, G2, G3, G4 and G5 can use non-conjunction CD4011 respectively, " with door " CD4081.

It is a plurality of to should be pointed out that especially switch S in external switch contact 1 can be provided with, as 16.And at this moment only need 5 CD4011 and 5 CD4081.Therefore, this alarm cost is low, and power consumption is little, and meets the ISA standard.

Claims

1, a kind of flashing signal alarm comprises outside connected switch contact point unit (1), and flashing light unit (4) and acoustics unit (5) is characterized in that it also comprises:

An oscillating unit (2) that is used for providing oscillation pulse signal to described flashing light unit (4) and described acoustics unit (5);

An extreme value detecting unit (3) that is connected with described oscillating unit (2) with described outside connected switch contact point unit (1) respectively, it delivers to described flashing light unit (4) and described acoustics unit (5) to the signal that described oscillating unit (2) produces respectively according to from the detected signal in described outside connected switch contact (1).

2, alarm according to claim 1 is characterized in that, described outside connected switch contact point unit (1) comprises an alarm actuating contact (S) and the test switch (1AN) in parallel with it.

3, alarm according to claim 1, it is characterized in that, described ultimate value detecting unit (3) comprises the logical circuit of being made up of NOT-AND gate (G1G3) and AND gate (G2), and in the RC circuit of being made up of electric capacity (C1) and resistance (R2), an affirmation switch (2AN) in its resistance (R2) two ends parallel connection.

4, alarm according to claim 1 is characterized in that, described oscillating unit (2) is a free-running multivibrator.

5, alarm according to claim 1 is characterized in that, described outside connected switch contact point unit (1) comprises a plurality of alarm actuating contacts (S) and a test switch (1AN) in parallel with it.