CN102915611B - Door and window burglar alarm based on Doppler effect - Google Patents
Door and window burglar alarm based on Doppler effect Download PDFInfo
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- CN102915611B CN102915611B CN201210423189.6A CN201210423189A CN102915611B CN 102915611 B CN102915611 B CN 102915611B CN 201210423189 A CN201210423189 A CN 201210423189A CN 102915611 B CN102915611 B CN 102915611B
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Abstract
The invention relates to the technical field of security protection and provides a door and window burglar alarm based on a Doppler effect. The door and window burglar alarm is characterized by comprising an antenna TX, a triode V1-V5, an inductor L1, capacitors C1-C7, resistors R1-R10, triodes V1-V5, an IC (integrated circuit) chip NE555 and a power supply, wherein the antenna TX, the triode V1, the inductor L1 and the capacitor C1 form a Doppler effect sensor; the inductor L1 is connected with a collector electrode of the triode V1; the capacitor C1 is connected between a base electrode and the collector electrode of the triode V1; antenna TX is led out at a junction of the inductor L1 and a triode VT1; the electronic R3 is a resistor at the base electrode of the triode and is connected with the base electrode of the triode and a positive electrode of the power supply; and a base electrode of a triode VT2 is coupled with one end of the inductor L1 through the capacitor C3.
Description
Technical field
The present invention relates to technical field of security and protection, a kind of door window antitheft alarm based on Doppler effect is provided.
Background technology
Existing door window antitheft alarm appliance adopts vibrating sensing induction mode to carry out burglar alarm mostly, although this antitheft mode can play anti-theft function to a certain extent, but on-the-spot near at some distance constructions, or there are neighbours to fit up and wrong report easily appears in the vibration that brings.
Summary of the invention
The object of the invention is to provide a kind of door window antitheft alarm based on Doppler effect.
The present invention is to achieve these goals by the following technical solutions:
A kind of door window antitheft alarm based on Doppler effect, it is characterized in that: comprise antenna TX, inductance L 1, capacitor C 1-C7, resistance R 1-R10, triode V1-V5, IC chip NE555, power supply, described antenna TX, triode V1, inductance L 1, capacitor C 1 forms doppler effect sensors, described inductance L 1 connects the collector of triode V1, capacitor C 1 is connected on base stage and the inter-collector of triode V1, described inductance L 1 is drawn antenna TX with triode V tie point, described resistance R 3 is transistor base resistance connecting triode base stage and positive source, the base stage of described triode V2 is by capacitor C 3 and inductance L 1 one end coupling, R5 is the base resistance of triode V2, triode V2 collector connects positive source by resistance R 6, triode V2 grounded emitter, the base stage of described triode V3 is by capacitor C 4 and triode V2 collector coupled, triode V3 emitter connects positive source, collector connects the base stage of triode V4 by resistance R 7, the collector of described triode V4 connects 2 pins of IC chip NE555, 3 pin of described NE555 connect the base stage of triode V5, the collector of triode V5 connects positive source, the emitter of triode V5 is by loudspeaker HA ground connection.
Also comprise diode D1; the anode of diode D1 connects the link of the base stage of capacitor C 4 and triode V3; the negative electrode of diode D1 connects positive source; 6 and 7 pins of IC chip NE555 are by capacitor C 5 ground connection; 5 pins of IC chip NE555 are by capacitor C 6 ground connection, and 3 pins of IC chip NE555 are by capacitor C 7 ground connection;
Inductance L 1 connects positive source by resistance R 1, the emitter of triode V1 is by resistance R 2 ground connection, the base stage of triode V1 is by resistance R 4 ground connection, triode V2 connects positive source by resistance R 6, triode V4 collector connects positive source by resistance R 8,6 and 7 pins of IC chip NE555 connect positive source by resistance R 9, and 3 pin of IC chip NE555 connect the base stage of triode V5 by resistance R 10.
Because the present invention adopts above technical scheme, so when circuit working of the present invention, sensor goes out high-frequency signal by antenna TX to putting space radiation week, effectively radiation radius can reach 8m left and right.In the time having people to enter to walk about in this region, the electromagnetic wave signal being returned by human-body emitting will by TX make V1 self-sustained oscillation signal amplitude and frequency is corresponding changes, thereby cause capacitor C 3 both end voltage to fluctuate.Human body is the closer to antenna TX, and the amplitude of voltage fluctuation can be larger, and human motion is faster, and the frequency of voltage fluctuation is higher.Fluctuation voltage is after V2 amplification, D1 detection, V3 and V4 transient switching, make NE555 (2) become low level, the monostable circuit upset being made up of time base circuit NE555 etc. enters transient state, its (3) pin output becomes high level, triode V5 conducting, alarming horn HA obtains the electricity repeated loud chimes of doom that sends.
Brief description of the drawings
Fig. 1 is circuit diagram of the present invention.
Embodiment
A kind of door window antitheft alarm based on Doppler effect, it is characterized in that: comprise antenna TX, inductance L 1, capacitor C 1-C7, resistance R 1-R10, triode V1-V5, IC chip NE555, power supply, described antenna TX, triode V1, inductance L 1, capacitor C 1 forms doppler effect sensors, described inductance L 1 connects the collector of triode V1, capacitor C 1 is connected on base stage and the inter-collector of triode V1, described inductance L 1 is drawn antenna TX with triode V1 tie point, described resistance R 3 is transistor base resistance connecting triode base stage and positive source, the base stage of described triode V is by capacitor C 3 and inductance L 1 one end coupling, R5 is the base resistance of triode V2, triode V2 collector connects positive source by resistance R 6, triode V2 grounded emitter, the base stage of described triode V3 is by capacitor C 4 and triode V2 collector coupled, triode V3 emitter connects positive source, collector connects the base stage of triode V4 by resistance R 7, the collector of described triode V4 connects 2 pins of IC chip NE555, 3 pin of described NE555 connect the base stage of triode V5, the collector of triode V5 connects positive source, the emitter of triode V5 is by loudspeaker HA ground connection.
Also comprise diode D1; the anode of diode D1 connects the link of the base stage of capacitor C 4 and triode V3; the negative electrode of diode D1 connects positive source; 6 and 7 pins of IC chip NE555 are by capacitor C 5 ground connection; 5 pins of IC chip NE555 are by capacitor C 6 ground connection, and 3 pins of IC chip NE555 are by capacitor C 7 ground connection;
Inductance L 1 connects positive source by resistance R 1, the emitter of triode V1 is by resistance R 2 ground connection, the base stage of triode V1 is by resistance R 4 ground connection, triode V2 connects positive source by resistance R 6, triode V4 collector connects positive source by resistance R 8,6 and 7 pins of IC chip NE555 connect positive source by resistance R 9, and 3 pin of IC chip NE555 connect the base stage of triode V5 by resistance R 10.
Because the present invention adopts above technical scheme, so when circuit working of the present invention, sensor goes out high-frequency signal by antenna TX to putting space radiation week, effectively radiation radius can reach 8m left and right.In the time having people to enter to walk about in this region, the electromagnetic wave signal being returned by human-body emitting will by TX make V1 self-sustained oscillation signal amplitude and frequency is corresponding changes, thereby cause capacitor C 3 both end voltage to fluctuate.Human body is the closer to antenna TX, and the amplitude of voltage fluctuation can be larger, and human motion is faster, and the frequency of voltage fluctuation is higher.Fluctuation voltage is after V2 amplification, D1 detection, V3 and V4 transient switching, make NE555 (2) become low level, the monostable circuit upset being made up of time base circuit NE555 etc. enters transient state, its (3) pin output becomes high level, triode V5 conducting, alarming horn HA obtains the electricity repeated loud chimes of doom that sends.
Claims (1)
1. the door window antitheft alarm based on Doppler effect, it is characterized in that: comprise antenna TX, inductance L 1, capacitor C 1-C7, resistance R 1-R10, triode V1-V5, IC chip NE555, power supply, described antenna TX, triode V1, inductance L 1, capacitor C 1 forms doppler effect sensors, described inductance L 1 connects the collector of triode V1, capacitor C 1 is connected on base stage and the inter-collector of triode V1, described inductance L 1 is drawn antenna TX with triode V1 tie point, described resistance R 3 is transistor base resistance connecting triode base stage and positive source, the base stage of described triode V2 is by capacitor C 3 and inductance L 1 one end coupling, R5 is the base resistance of triode V2, triode V2 collector connects positive source by resistance R 6, triode V2 grounded emitter, the base stage of described triode V3 is by capacitor C 4 and triode V2 collector coupled, triode V3 emitter connects positive source, collector connects the base stage of triode V4 by resistance R 7, the collector of described triode V4 connects 2 pins of IC chip NE555, the collector of triode V5 connects positive source, the emitter of triode V5 is by loudspeaker HA ground connection, 3 pin of IC chip NE555 connect the base stage of triode V5 by resistance R 10,
Also comprise diode D1; the anode of diode D1 connects the link of the base stage of capacitor C 4 and triode V3; the negative electrode of diode D1 connects positive source; 6 and 7 pins of IC chip NE555 are by capacitor C 5 ground connection; 5 pins of IC chip NE555 are by capacitor C 6 ground connection, and 3 pins of IC chip NE555 are by capacitor C 7 ground connection;
Inductance L 1 connects positive source by resistance R 1, the emitter of triode V1 is by resistance R 2 ground connection, the base stage of triode V1 is by resistance R 4 ground connection, and triode V4 collector connects positive source by resistance R 8, and 6 and 7 pins of IC chip NE555 connect positive source by resistance R 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210423189.6A CN102915611B (en) | 2012-10-30 | 2012-10-30 | Door and window burglar alarm based on Doppler effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210423189.6A CN102915611B (en) | 2012-10-30 | 2012-10-30 | Door and window burglar alarm based on Doppler effect |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102915611A CN102915611A (en) | 2013-02-06 |
| CN102915611B true CN102915611B (en) | 2014-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210423189.6A Expired - Fee Related CN102915611B (en) | 2012-10-30 | 2012-10-30 | Door and window burglar alarm based on Doppler effect |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103824402A (en) * | 2013-11-26 | 2014-05-28 | 成都博盛信息技术有限公司 | Induction type anti-theft alarm |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB666413A (en) * | 1949-01-18 | 1952-02-13 | Ferranti Ltd | Improvements relating to apparatus for the measurement of the velocity of a moving body with respect to its surrounding fluid medium |
| CN2090083U (en) * | 1991-05-03 | 1991-12-04 | 张金师 | Doppler anti-theft siren |
| CN2257054Y (en) * | 1996-06-25 | 1997-06-25 | 綦敦星 | Multifunctional automatic monitoring burglar alarm |
| CN201716817U (en) * | 2010-06-17 | 2011-01-19 | 上海工程技术大学 | Alarm used in danger areas |
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- 2012-10-30 CN CN201210423189.6A patent/CN102915611B/en not_active Expired - Fee Related
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