CN203673603U - Household anti-theft alarm - Google Patents
Household anti-theft alarm Download PDFInfo
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- CN203673603U CN203673603U CN201320805650.4U CN201320805650U CN203673603U CN 203673603 U CN203673603 U CN 203673603U CN 201320805650 U CN201320805650 U CN 201320805650U CN 203673603 U CN203673603 U CN 203673603U
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Abstract
The utility model relates to an anti-theft alarm, particularly to a household anti-theft alarm. The alarm comprises a detection circuit, an amplification circuit and a time delay alarm circuit. The detection circuit comprises a power supply, an antenna, a triode one, a capacitor one, an inductor, a resistor one, a resistor two, a resistor three and a resistor four. The amplification circuit includes a triode two, a triode three, a triode four, a diode, a capacitor two, a capacitor three, a capacitor four, a resistor five, a resistor six, a resistor seven and a resistor eight. The time delay alarm circuit comprises a 555 time base chip, a triode five, a speaker, a resistor nine, a resistor ten, a capacitor five, a capacitor six, a capacitor seven and a capacitor eight. The alarm gives off alarm sound when a thief enters a guarded area, and thus solves the technical problem that an alarm in the prior art gives a sound alarm when the thief picks a door lock so that the door lock is damaged.
Description
Technical field
The utility model relates to a kind of burglar alarm, relates in particular to a kind of family expenses formula burglar alarm.
Background technology
Common burglar alarm is generally oscillatory type on the market, only in the time that robber prizes door lock, just understands trigger alarm device, sends alarm sound, at this moment, although people can prevent robber's burglary,, door lock but unavoidably will be damaged by robber, causes damage.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of burglar alarm that enters warning region and will send alarm sound robber, can effectively avoid robber to damage door lock.
In order to solve the problems of the technologies described above, the utility model provides following technical scheme:
A kind of family expenses formula burglar alarm, described warning circuit comprises detection circuit, amplifying circuit and delayed alarm circuit;
Described detection circuit comprises power supply, antenna, triode one, electric capacity one, inductance, resistance one, resistance two, resistance three and resistance four; After described resistance three and resistance four series connection, be connected to the two ends of power supply, after being connected with positive source, described resistance one connects with inductance, described triode one base stage is connected between resistance three and resistance four, collector is connected with inductance, emitter is connected with power cathode by resistance two, described antenna is connected with triode one collector, and described electric capacity one one end is connected with triode one base stage, and the other end is connected with triode one collector;
Described amplifying circuit comprises triode two, triode three, triode four, diode, electric capacity two, electric capacity three, electric capacity four, resistance five, resistance six, resistance seven and resistance eight, described triode two collectors are connected with triode three base stages by electric capacity four, described triode three collectors are connected with triode four base stages by resistance seven, described triode two collectors are by resistance six, triode four collectors are connected with positive source by resistance eight, described triode three collectors are connected with positive source, the emitter of described triode two and triode four is connected with power cathode, described diode cathode is connected with triode three base stages, negative pole is connected with positive source, described resistance end on May Day is connected with triode two base stages, the other end is connected with triode two collectors, described electric capacity two one end are connected with resistance one and inductance, the other end is connected with power cathode, described electric capacity three one end are connected with resistance one and inductance, the other end is connected with triode two base stages,
Described delayed alarm circuit comprises base chip, triode five, loudspeaker, resistance nine, resistance ten, electric capacity five, electric capacity six, electric capacity seven and electric capacity eight at 555 o'clock, described resistance nine is connected with electric capacity five, described resistance ten is connected with electric capacity seven, described electric capacity eight is in parallel with loudspeaker, described resistance nine, 555 o'clock base chip positive power source terminals, reset terminal is all connected with positive source with triode five collectors, the threshold values end of described 555 o'clock base chips and discharge end are connected between resistance nine and electric capacity five, the trigger end of described 555 o'clock base chips is connected with triode four collectors, the output terminal of described 555 o'clock base chips is connected between resistance ten and electric capacity seven, described resistance ten is connected with triode five base stages, described loudspeaker is connected with triode five emitters, described electric capacity five, electric capacity seven, loudspeaker is connected with power cathode with 555 o'clock base chip negative power ends, the control voltage end of described 555 o'clock base chips is connected with power cathode by electric capacity six.
Principle of work of the present utility model:
This burglar alarm is by triode one, electric capacity one, inductance and antenna etc. have formed easy doppler effect sensors detection circuit, when circuit working, go out high-frequency signal by electric wire space radiation towards periphery, effectively radiation radius can reach 8M left and right, in the time having people to enter this region, the electromagnetic wave signal being reflected back by human body will make amplitude and the frequency of the self-sustained oscillation signal of triode one that corresponding variation occur by antenna, thereby cause the voltage at electric capacity three two ends to fluctuate, human body is the closer to antenna, the amplitude of voltage fluctuation is larger, human motion is faster, the frequency of voltage fluctuation is higher, fluctuation voltage amplifies through triode two, after diode detection, make triode three and triode four transient switchings, make the triggering pin of 555 o'clock base chips be low level, now, the monostable circuit state turnover being made up of 555 o'clock base chips etc. enters transient state, the output of output pin is high level, triode five conductings, loudspeaker obtains the electric loud chimes of doom that sends, this moment, even if human body is away from warning region, loudspeaker also can delayed alarm one end time, the time of delayed alarm is decided by the transient state time of monostable circuit, be approximately 25S.
Adopt the utility model to have following technique effect:
Can enter warning region and will send robber the burglar alarm of alarm sound, can effectively avoid robber to damage door lock.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of a kind of family expenses formula of the utility model burglar alarm.
Embodiment
As shown in Figure 1, a kind of family expenses formula burglar alarm, described warning circuit comprises detection circuit, amplifying circuit and delayed alarm circuit;
Described detection circuit comprises power supply, antenna W, triode one VT1, electric capacity one C1, inductance L 1, resistance one R1, resistance two R2, resistance three R3 and resistance four R4; After described resistance three R3 and resistance four R4 series connection, be connected to the two ends of power supply, after being connected with positive source, described resistance one R1 connects with inductance L, described triode one VT1 base stage is connected between resistance three R3 and resistance four R4, collector is connected with inductance L, emitter is connected with power cathode by resistance two R2, described antenna W is connected with triode one VT1 collector, and described electric capacity one C1 one end is connected with triode one VT1 base stage, and the other end is connected with triode one VT1 collector;
Described amplifying circuit comprises triode two VT2, triode three VT3, triode four VT4, diode VD1, electric capacity two C2, electric capacity three C, electric capacity four C4, resistance five R5, resistance six R6, resistance seven R7 and resistance eight R8, described triode two VT2 collectors are connected with triode three VT3 base stages by electric capacity four C4, described triode three VT3 collectors are connected with triode four VT4 base stages by resistance seven R7, described triode two VT2 collectors are by resistance six R6, triode four VT4 collectors are connected with positive source by resistance eight R8, described triode three VT3 collectors are connected with positive source, described triode two VT2 are connected with power cathode with the emitter of triode four VT4, described diode VD1 is anodal to be connected with triode three VT3 base stages, negative pole is connected with positive source, described resistance five R5 one end are connected with triode two VT2 base stages, the other end is connected with triode two VT2 collectors, described electric capacity two C2 one end are connected with resistance one R1 and inductance L, the other end is connected with power cathode, described electric capacity three C3 one end are connected with resistance one R1 and inductance L, the other end is connected with triode two VT2 base stages,
Described delayed alarm circuit comprises base chip IC, triode five VT5, loudspeaker BL, resistance nine R9, resistance ten R10, electric capacity five C5, electric capacity six C6, electric capacity seven C7 and electric capacity eight C8 at 555 o'clock, described resistance nine R9 connect with electric capacity five C5, described resistance ten R10 connect with electric capacity seven C7, described electric capacity eight C8 are in parallel with loudspeaker BL, described resistance nine R9, 555 o'clock base chip IC positive power source terminals 8, reset terminal 4 is all connected with positive source with triode five VT5 collectors, the threshold values end 6 of described 555 o'clock base chip IC and discharge end 7 are connected between resistance nine R9 and electric capacity five C5, the trigger end 2 of described 555 o'clock base chip IC is connected with triode four VT4 collectors, the output terminal 3 of described 555 o'clock base chip IC is connected between resistance ten R10 and electric capacity seven C7, described resistance ten R10 are connected with triode five VT5 base stages, described loudspeaker BL is connected with triode five VT5 emitters, described electric capacity five C5, electric capacity seven C7, loudspeaker BL is connected with power cathode with 555 o'clock base chip IC negative power ends 1, the control voltage end 5 of described 555 o'clock base chip IC is connected with power cathode by electric capacity six C6.
Device is selected: the utility model adopts 12V Power supply, the selection of each triode is without particular/special requirement, resistance one R1 selects 1K Ω, resistance two R2 select 510 Ω, resistance three R3 and resistance four R4 select 5.1 K Ω, resistance five R5 select 820 K Ω, resistance six R6 select 5.1 K Ω, resistance seven R7 select 1 K Ω, resistance eight R8 select 20 K Ω, resistance nine R9 select 1M Ω, resistance ten R10 select 220 Ω, electric capacity one C1 selects 12pF, electric capacity two C2 select 2.2nF, electric capacity three C3 and electric capacity four C4 select 33 μ F, electric capacity five C5 select 22 μ F, electric capacity six C6 select 10nF, electric capacity seven C7 select 4.7 μ F, electric capacity eight C8 select 220 μ F.
Above-described is only preferred implementation of the present utility model, it should be pointed out that for a person skilled in the art, not departing under the prerequisite of the utility model structure, can also make some distortion and improvement.These also should be considered as protection domain of the present utility model, and these can not affect effect and practical applicability that the utility model is implemented.
Claims (1)
1. a family expenses formula burglar alarm, is characterized in that: described warning circuit comprises detection circuit, amplifying circuit and delayed alarm circuit;
Described detection circuit comprises power supply, antenna, triode one, electric capacity one, inductance, resistance one, resistance two, resistance three and resistance four; After described resistance three and resistance four series connection, be connected to the two ends of power supply, after being connected with positive source, described resistance one connects with inductance, described triode one base stage is connected between resistance three and resistance four, collector is connected with inductance, emitter is connected with power cathode by resistance two, described antenna is connected with triode one collector, and described electric capacity one one end is connected with triode one base stage, and the other end is connected with triode one collector;
Described amplifying circuit comprises triode two, triode three, triode four, diode, electric capacity two, electric capacity three, electric capacity four, resistance five, resistance six, resistance seven and resistance eight, described triode two collectors are connected with triode three base stages by electric capacity four, described triode three collectors are connected with triode four base stages by resistance seven, described triode two collectors are by resistance six, triode four collectors are connected with positive source by resistance eight, described triode three collectors are connected with positive source, the emitter of described triode two and triode four is connected with power cathode, described diode cathode is connected with triode three base stages, negative pole is connected with positive source, described resistance end on May Day is connected with triode two base stages, the other end is connected with triode two collectors, described electric capacity two one end are connected with resistance one and inductance, the other end is connected with power cathode, described electric capacity three one end are connected with resistance one and inductance, the other end is connected with triode two base stages,
Described delayed alarm circuit comprises base chip, triode five, loudspeaker, resistance nine, resistance ten, electric capacity five, electric capacity six, electric capacity seven and electric capacity eight at 555 o'clock, described resistance nine is connected with electric capacity five, described resistance ten is connected with electric capacity seven, described electric capacity eight is in parallel with loudspeaker, described resistance nine, 555 o'clock base chip positive power source terminals, reset terminal is all connected with positive source with triode five collectors, the threshold values end of described 555 o'clock base chips and discharge end are connected between resistance nine and electric capacity five, the trigger end of described 555 o'clock base chips is connected with triode four collectors, the output terminal of described 555 o'clock base chips is connected between resistance ten and electric capacity seven, described resistance ten is connected with triode five base stages, described loudspeaker is connected with triode five emitters, described electric capacity five, electric capacity seven, loudspeaker is connected with power cathode with 555 o'clock base chip negative power ends, the control voltage end of described 555 o'clock base chips is connected with power cathode by electric capacity six.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320805650.4U CN203673603U (en) | 2013-12-10 | 2013-12-10 | Household anti-theft alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320805650.4U CN203673603U (en) | 2013-12-10 | 2013-12-10 | Household anti-theft alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203673603U true CN203673603U (en) | 2014-06-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320805650.4U Expired - Fee Related CN203673603U (en) | 2013-12-10 | 2013-12-10 | Household anti-theft alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203673603U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104732683A (en) * | 2015-03-24 | 2015-06-24 | 易礼智 | Low-consumption sound-light alarm circuit |
| CN105160786A (en) * | 2015-09-18 | 2015-12-16 | 成都索客通信息技术有限公司 | High-sensitivity sound-control anti-theft alarm circuit |
-
2013
- 2013-12-10 CN CN201320805650.4U patent/CN203673603U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104732683A (en) * | 2015-03-24 | 2015-06-24 | 易礼智 | Low-consumption sound-light alarm circuit |
| CN104732683B (en) * | 2015-03-24 | 2017-04-12 | 易礼智 | Low-consumption sound-light alarm circuit |
| CN105160786A (en) * | 2015-09-18 | 2015-12-16 | 成都索客通信息技术有限公司 | High-sensitivity sound-control anti-theft alarm circuit |
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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 |
Granted publication date: 20140625 Termination date: 20141210 |
|
| EXPY | Termination of patent right or utility model |