CN204833554U - Anti -theft alarm - Google Patents
Anti -theft alarm Download PDFInfo
- Publication number
- CN204833554U CN204833554U CN201520591540.1U CN201520591540U CN204833554U CN 204833554 U CN204833554 U CN 204833554U CN 201520591540 U CN201520591540 U CN 201520591540U CN 204833554 U CN204833554 U CN 204833554U
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- Prior art keywords
- resistance
- triode
- electric capacity
- relay
- collector
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- Burglar Alarm Systems (AREA)
Abstract
The utility model discloses an anti -theft alarm, including piezoelectric sensor Y, relay J, resistance R1, electric capacity C1, triode VT1 and diode D1. The utility model discloses do not use any chip element, the interference killing feature is strong, uses relay J to separate sensor circuit and warning circuit moreover, and the stand -by power consumption is very low, and whole alarm circuit structure is simple, small, the safety and stability, and the misstatement rate is low.
Description
Technical field
The utility model relates to a kind of alarm, specifically a kind of burglar alarm.
Background technology
Common antitheft door does not generally all install warning device, this makes burglar when opening antitheft door, as long as enabling sound is not too large, can not cause watching out for of people, its antitheft performance is not good, more existing antitheft door alarm device internal circuit configuration more complicated and volume are comparatively large, and affect attractive in appearance on the one hand, anti-theft effect is general on the other hand, easily to report by mistake, the situation such as not report, and alarm is in holding state mostly always, power consumption is large, waste electric energy.
Utility model content
The purpose of this utility model is to provide a kind of safe, energy-conservation burglar alarm, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of burglar alarm, comprises piezoelectric sensor Y, relay J, resistance R1, electric capacity C1, triode VT1 and diode D1, described piezoelectric sensor Y is contact resistance R1 respectively, electric capacity C1 and triode VT1 base stage, the piezoelectric sensor Y other end connects the electric capacity C1 other end respectively, triode VT1 emitter, electric capacity C5, triode VT2 emitter, resistance R7, resistance R8, diode D1 positive pole, resistance R9, triode VT5 emitter, diode D2 positive pole and relay J coil ground connection, triode VT1 collector is the contact resistance R1 other end respectively, electric capacity C3 and resistance R2, the resistance R2 other end connects direct earth capacitance C2 respectively, resistance R3, resistance R4, resistance R5 and resistance R6, the described electric capacity C3 other end is contact resistance R3 respectively, the electric capacity C5 other end and triode VT2 base stage, triode VT2 collector is the contact resistance R4 other end and triode VT3 base stage respectively, and triode VT3 collector connects electric capacity C4 and the resistance R5 other end respectively, and the electric capacity C4 other end is contact resistance R8 respectively, diode D1 negative pole and triode VT4 base stage, triode VT4 collector is the contact resistance R6 other end respectively, resistance R11, triode VT6 emitter and power supply VCC, triode VT4 emitter is the contact resistance R9 other end and resistance R10 respectively, resistance R10 other end connecting triode VT5 base stage, triode VT5 collector is the contact resistance R11 other end and resistance R12 respectively, resistance R12 other end connecting triode VT6 base stage, triode VT6 collector connects diode D2 negative pole and the relay J coil other end respectively, relay J contact switch J-1 one end contact resistance R, the resistance R other end connects 220V alternating current, the 220V alternating current other end connects hummer B, and the hummer B other end connects the relay J contact switch J-1 other end.
As the utility model further scheme: described power supply VCC voltage is 12V.
Compared with prior art, the beneficial effects of the utility model are: the utility model does not use any chip component, antijamming capability is strong, and use relay J sensor circuit and warning circuit to be separated, stand-by power consumption is very low, and whole alarm circuit structure is simple, and volume is little, safety and stability, rate of false alarm is low.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of burglar alarm.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of burglar alarm, comprises piezoelectric sensor Y, relay J, resistance R1, electric capacity C1, triode VT1 and diode D1, described piezoelectric sensor Y is contact resistance R1 respectively, electric capacity C1 and triode VT1 base stage, the piezoelectric sensor Y other end connects the electric capacity C1 other end respectively, triode VT1 emitter, electric capacity C5, triode VT2 emitter, resistance R7, resistance R8, diode D1 positive pole, resistance R9, triode VT5 emitter, diode D2 positive pole and relay J coil ground connection, triode VT1 collector is the contact resistance R1 other end respectively, electric capacity C3 and resistance R2, the resistance R2 other end connects direct earth capacitance C2 respectively, resistance R3, resistance R4, resistance R5 and resistance R6, the described electric capacity C3 other end is contact resistance R3 respectively, the electric capacity C5 other end and triode VT2 base stage, triode VT2 collector is the contact resistance R4 other end and triode VT3 base stage respectively, and triode VT3 collector connects electric capacity C4 and the resistance R5 other end respectively, and the electric capacity C4 other end is contact resistance R8 respectively, diode D1 negative pole and triode VT4 base stage, triode VT4 collector is the contact resistance R6 other end respectively, resistance R11, triode VT6 emitter and power supply VCC, triode VT4 emitter is the contact resistance R9 other end and resistance R10 respectively, resistance R10 other end connecting triode VT5 base stage, triode VT5 collector is the contact resistance R11 other end and resistance R12 respectively, resistance R12 other end connecting triode VT6 base stage, triode VT6 collector connects diode D2 negative pole and the relay J coil other end respectively, relay J contact switch J-1 one end contact resistance R, the resistance R other end connects 220V alternating current, the 220V alternating current other end connects hummer B, and the hummer B other end connects the relay J contact switch J-1 other end.
Power supply VCC voltage is 12V.
Principle of work of the present utility model is: this alarm uses one to be hidden in cheap piezoelectric sensor Y on door and window as sensor, this sensor has Bidirectional pressure electrical effect: when adding voltage at its two ends, and its piezoceramic material can produce mechanically deform and send vibrations sound; Otherwise when it is subject to the mechanical shock sound produced when robber forces open the door and enters the room, will produce corresponding output voltage at its two ends, a kind of characteristic after the utility model utilizes, makes it play the effect of vibration sensor.
Refer to Fig. 1, the first order amplifier that the voltage that piezoelectric sensor Y produces is made up of triode VT1 etc. amplifies about 100 times, and triode VT2 plays detection, and its collector voltage only has 50mv.Because the base stage of triode VT2 is directly received power supply main track by resistance R3, triode VT2 is always in conducting state and does not play amplification.Triode VT3 provides the voltage gain of about 3 times, and drive diode D1, when the impulse level inputted is enough high, triode VT4 is rapidly to electric capacity C6 and charges, after pulse, electric capacity C6 is slowly discharged by the high impedance circuit of resistance R9 and resistance R10 and triode VT5 base emitter-base bandgap grading composition, determines the turn-on time of relay J this discharge time.
Electric capacity C1 is used for anti-tampering, and reduce rate of false alarm, when relay does not work, the utility model power consumption only has several milliampere.
Claims (2)
1. a burglar alarm, comprises piezoelectric sensor Y, relay J, resistance R1, electric capacity C1, triode VT1 and diode D1, is characterized in that, described piezoelectric sensor Y is contact resistance R1 respectively, electric capacity C1 and triode VT1 base stage, the piezoelectric sensor Y other end connects the electric capacity C1 other end respectively, triode VT1 emitter, electric capacity C5, triode VT2 emitter, resistance R7, resistance R8, diode D1 positive pole, resistance R9, triode VT5 emitter, diode D2 positive pole and relay J coil ground connection, triode VT1 collector is the contact resistance R1 other end respectively, electric capacity C3 and resistance R2, the resistance R2 other end connects direct earth capacitance C2 respectively, resistance R3, resistance R4, resistance R5 and resistance R6, the described electric capacity C3 other end is contact resistance R3 respectively, the electric capacity C5 other end and triode VT2 base stage, triode VT2 collector is the contact resistance R4 other end and triode VT3 base stage respectively, and triode VT3 collector connects electric capacity C4 and the resistance R5 other end respectively, and the electric capacity C4 other end is contact resistance R8 respectively, diode D1 negative pole and triode VT4 base stage, triode VT4 collector is the contact resistance R6 other end respectively, resistance R11, triode VT6 emitter and power supply VCC, triode VT4 emitter is the contact resistance R9 other end and resistance R10 respectively, resistance R10 other end connecting triode VT5 base stage, triode VT5 collector is the contact resistance R11 other end and resistance R12 respectively, resistance R12 other end connecting triode VT6 base stage, triode VT6 collector connects diode D2 negative pole and the relay J coil other end respectively, relay J contact switch J-1 one end contact resistance R, the resistance R other end connects 220V alternating current, the 220V alternating current other end connects hummer B, and the hummer B other end connects the relay J contact switch J-1 other end.
2. burglar alarm according to claim 1, is characterized in that, described power supply VCC voltage is 12V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520591540.1U CN204833554U (en) | 2015-08-01 | 2015-08-01 | Anti -theft alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520591540.1U CN204833554U (en) | 2015-08-01 | 2015-08-01 | Anti -theft alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204833554U true CN204833554U (en) | 2015-12-02 |
Family
ID=54691127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520591540.1U Expired - Fee Related CN204833554U (en) | 2015-08-01 | 2015-08-01 | Anti -theft alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204833554U (en) |
-
2015
- 2015-08-01 CN CN201520591540.1U patent/CN204833554U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151202 Termination date: 20160801 |