CN203032613U - Automatic power-off vehicle anti-theft device - Google Patents
Automatic power-off vehicle anti-theft device Download PDFInfo
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- CN203032613U CN203032613U CN 201320047422 CN201320047422U CN203032613U CN 203032613 U CN203032613 U CN 203032613U CN 201320047422 CN201320047422 CN 201320047422 CN 201320047422 U CN201320047422 U CN 201320047422U CN 203032613 U CN203032613 U CN 203032613U
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- voltage comparator
- schmidt trigger
- resistance
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- relay
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Abstract
The utility model relates to a vehicle anti-theft device, in particular to a device capable of automatically alarming and cutting off an engine power supply when a vehicle is stolen. The automatic power-off vehicle anti-theft device comprises a touch detection module, a voice alarming module and a power-off module. The touch detection module comprises a touch sensor, a voltage comparator, a first Schmitt trigger and a second Schmitt trigger. An output end of the touch sensor is connected with an input end of the voltage comparator, an output end of the voltage comparator is connected with an input end of the first Schmitt trigger, and an output end of the first Schmitt trigger is connected with an input end of the second Schmitt trigger. The voice alarming module comprises a transistor, a relay and an alarm, a base electrode of the transistor is connected with an output end of the second Schmitt trigger, a collector electrode of the transistor is connected with an input end of the relay, and an output end of the relay is connected with a vehicle engine power system. The vehicle anti-theft device has the advantages of being convenient to install and maintain, effective in guarding against theft and capable of bringing convenience to a user.
Description
Technical field
A kind of alarms and security systems for automobiles of cutting off the electricity supply automatically of the utility model relates to a kind of alarms and security systems for automobiles, particularly a kind of device that can report to the police and cut off the driving engine power supply when automobile is stolen automatically.
Background technology
Vehicle alarm device great majority in the market realize that according to vehicle periphery sound and vibration audio alert, its shortcoming are audio alerts only, only intimidate power to the robber, and do not have the prevention measure of essence.
Summary of the invention
The purpose of this utility model is to provide a kind of alarms and security systems for automobiles of cutting off the electricity supply automatically at above-mentioned weak point, after the automobile audio alert starts, cuts off the driving engine power-supply system automatically, plays antitheft effect.
A kind of alarms and security systems for automobiles of cutting off the electricity supply automatically takes following technical scheme to realize: a kind of alarms and security systems for automobiles of cutting off the electricity supply automatically comprises the touch detection module, audio alert module and power-off modular, touch detection module of living in comprises touch sensor, voltage comparator, first Schmidt trigger and second Schmidt trigger, the mouth of touch sensor links to each other with the input end of voltage comparator, the mouth of voltage comparator links to each other with the input end of first Schmidt trigger, and the mouth of first Schmidt trigger links to each other with the input end of second Schmidt trigger; The audio alert module comprises aerotron, relay and annunciator, and the base stage of aerotron links to each other with the mouth of second Schmidt trigger, and the collecting electrode of aerotron links to each other with the input end of relay, and the mouth of relay links to each other with the automotive engine power-supply system.
Described touch sensor is used for starting warning device, be made by steel disc or aluminium flake, the middle aperture that bores, link to each other with metal position on the vehicle body by lead, metal parts such as the metal case of vehicle, lock core for example, when object touched the metal case of automobile, touch signal had just passed to voltage comparator as the condition that starts annunciator by the steel disc that sticks to vehicle body automatically.To wave shaping, the signal after the shaping is transferred to aerotron to the high level that voltage comparator is made comparison, output with signal by the two-stage Schmidt trigger, thus the conducting of control relay and ending, and then open anti-theft feature.
The circuit of described touch detection module and audio alert module comprises voltage comparator, adjustable resistance, first resistance, second resistance, first electric capacity, first Schmidt trigger, second Schmidt trigger, crystal triode, second electric capacity, transistor diode and relay, inverting input 2 pin of voltage comparator link to each other with adjustable resistance, in-phase input end 3 pin of voltage comparator link to each other with touch sensor, be in series with first resistance between mouth 7 pin of voltage comparator and the power supply, mouth 7 pin of voltage comparator link to each other with second resistance, be serially connected with first electric capacity between second resistance and the ground wire, second resistance, first Schmidt trigger and second Schmidt trigger series connection back link to each other with the base stage of crystal triode, second electric capacity and transistor diode parallel connection, the collecting electrode of crystal triode links to each other with the common end of second electric capacity and transistor diode, the common end of another of second electric capacity and transistor diode parallel connection links to each other with power supply, links to each other with the automotive engine power-supply system after relay and the transistor diode parallel connection.
Described first Schmidt trigger and second Schmidt trigger adopt 40106 commercially available Schmidt triggers.
Described voltage comparator adopts commercially available integrated voltage comparator.
Described relay adopts commercially available CD4098 relay.
Described first resistance and second resistance adopt RT11 resistance.
Described first electric capacity adopts chemical capacitor, and second electric capacity adopts ceramic disc capacitor.
Described power supply is vehicle-mounted direct supply.
Described transistor diode adopts commercially available 1N4001 type transistor diode, for the protection of the coil of relay.
The utility model is reasonable in design, simple in structure, at vehicle body touch sensor is installed, can be at automobile and start automatically when deploying troops on garrison duty state, only when contacting auto body, the people just understands automatic cutout driving engine power-supply system, cutting off the driving engine power module just can start after the audio alert module starts, after audio alert finishes, the normal power-on of car owner or chaufeur, the driving engine power circuit could recover automatically.Even if the robber opens car door by force like this, also cannot start automobile, played antitheft effect.This anti-joyride device convenient is installed, easy to maintenance, has played substantial antitheftly, brings convenience to the user.
Description of drawings
Below with reference to accompanying drawing the utility model is described further:
Fig. 1 is the principle of work block diagram of a kind of alarms and security systems for automobiles of cutting off the electricity supply automatically of the utility model.
Fig. 2 is the schematic circuit diagram of a kind of alarms and security systems for automobiles of cutting off the electricity supply automatically of the utility model.
The specific embodiment
With reference to accompanying drawing 1 ~ 2, a kind of alarms and security systems for automobiles of cutting off the electricity supply automatically of the utility model comprises the touch detection module, audio alert module and power-off modular, touch detection module of living in comprises touch sensor M1 ~ Mn, voltage comparator LM111, the first Schmidt trigger FF1 and the second Schmidt trigger FF2, the mouth of touch sensor M1 ~ Mn links to each other with the input end of voltage comparator LM111, the mouth of voltage comparator LM111 links to each other with the input end of the first Schmidt trigger FF1, and the mouth of the first Schmidt trigger FF1 links to each other with the input end of the second Schmidt trigger FF2; The audio alert module comprises aerotron Q1, relay K and annunciator, the base stage of aerotron Q1 links to each other with the mouth of the second Schmidt trigger FF2, the collecting electrode of aerotron Q1 links to each other with the input end of relay K, and the mouth of relay K links to each other with automotive engine power-supply system QC.
Described touch sensor M1 ~ Mn is used for starting warning device, be made by steel disc or aluminium flake, the middle aperture that bores, link to each other with metal position on the vehicle body by lead, metal parts such as the metal case of vehicle, lock core for example, when object touched the metal case of automobile, touch signal had just passed to voltage comparator LM111 as the condition that starts annunciator by the steel disc that sticks to vehicle body automatically.To wave shaping, the signal after the shaping is transferred to aerotron Q1 to the high level that voltage comparator LM111 makes comparison, output with signal by the two-stage Schmidt trigger, thus the conducting of control relay K and ending, and then open anti-theft feature.
The circuit of described touch detection module and audio alert module comprises voltage comparator LM111, adjustable resistance RP, first resistance R 1, second resistance R 2, first capacitor C 1, the first Schmidt trigger FF1, the second Schmidt trigger FF2, crystal triode Q1, second capacitor C 2, transistor diode D1 and relay K, inverting input 2 pin of voltage comparator LM111 link to each other with adjustable resistance RP, in-phase input end 3 pin of voltage comparator LM111 link to each other with touch sensor M1 ~ Mn, be in series with first resistance R 1 between mouth 7 pin of voltage comparator LM111 and the power supply VCC, mouth 7 pin of voltage comparator LM111 link to each other with second resistance R 2, be serially connected with first capacitor C 1 between second resistance R 2 and the ground wire, resistance R 2, the first Schmidt trigger FF1 and second Schmidt trigger FF2 series connection back link to each other with the base stage of crystal triode Q1, second capacitor C 2 and transistor diode D1 parallel connection, the collecting electrode of crystal triode Q1 links to each other with the common end of second capacitor C 2 and transistor diode D1, the common end of another of second capacitor C 2 and transistor diode D1 parallel connection links to each other with power supply VCC, links to each other with automotive engine power-supply system QC after relay K and the transistor diode D1 parallel connection.
Described first Schmidt trigger and second Schmidt trigger adopt 40106 commercially available Schmidt triggers.
Described voltage comparator LM111 adopts commercially available integrated voltage comparator.
Described relay K adopts commercially available CD4098 relay.
Described first resistance R 1 and second resistance R 2 adopt RT11 resistance.
Described first capacitor C 1 adopts chemical capacitor, and second capacitor C 2 adopts ceramic disc capacitor.
Described power supply VCC is vehicle-mounted direct supply.
Described transistor diode D1 adopts commercially available 1N4001 type transistor diode, for the protection of the coil of relay K.
Principle of work:When object touches any one or vehicle body among touch sensor M1～Mn, the 3 pin current potentials of voltage comparator LM111 are less than the 2 pin current potentials of voltage comparator LM111, the 7 pin output high level of voltage comparator LM111, through the two-stage Schmidt trigger to wave shaping, aerotron Q1 is in saturation conditions, the relay K action, normally closed contact K disconnects and cuts off automotive engine power-supply system QC, has realized starting the effect of automobile.
If there is not this moment object to touch any a slice among touch sensor M1 ~ Mn, switch disconnects, the 3 pin current potentials of voltage comparator LM111 are greater than the 2 pin current potentials of voltage comparator LM111, the 7 pin output low levels of voltage comparator LM111, to wave shaping, aerotron Q1 is in off condition through the two-stage Schmidt trigger, and relay K is failure to actuate, normally closed contact K closure guarantees automotive engine power-supply system QC normal operation.
Voltage comparator is integrated transporting discharging nonlinear application circuit, and it is compared an analog quantity voltage signal and one with reference to fixed voltage, the two amplitude equate near, output voltage will produce transition, corresponding output high level or low level.Comparator can be formed the nonsinusoidal waveform translation circuit and be applied to fields such as analog and digital signal conversion.
Transport property when Ui＜Ur, amplifier output Uo high level, when Ui＞Ur, amplifier output Uo low level.Therefore, be the boundary with Ur, when input voltage Ui changed, mouth reflected two states, high potential and active potential.
Integrated voltage comparator LM111 can become binary signal with analog signal conversion, namely has only the discrete signal of high level and low level two states.Its characteristics: the open-loop gain than integrated transporting discharging is low, and offset voltage is big, and common-mode rejection ratio is little; But its speed of response is fast, and the propagation delay time is short, and need not add limiter circuit and just can directly drive integrated digital circuits such as TTL, CMOS and ECL; Some chip belt load-carrying capacity is very strong, also can directly drive relay and indicator lamp.
Signal can be subjected to the interference of each side in practice, and can there be many clutter compositions in waveform, need handle waveform, and Schmidt trigger can incoming signal be shaped to the precipitous rectangular pulse in edge changing slowly in use.Simultaneously, Schmidt trigger also can utilize its hysteresis voltage to improve the antijamming capability of circuit.
Claims (9)
1. alarms and security systems for automobiles of cutting off the electricity supply automatically, it is characterized in that: comprise touching detection module, audio alert module and power-off modular, touch detection module of living in comprises touch sensor, voltage comparator, first Schmidt trigger and second Schmidt trigger, the mouth of touch sensor links to each other with the input end of voltage comparator, the mouth of voltage comparator links to each other with the input end of first Schmidt trigger, and the mouth of first Schmidt trigger links to each other with the input end of second Schmidt trigger; The audio alert module comprises aerotron, relay and annunciator, and the base stage of aerotron links to each other with the mouth of second Schmidt trigger, and the collecting electrode of aerotron links to each other with the input end of relay, and the mouth of relay links to each other with the automotive engine power-supply system;
Described touch sensor be used for to start warning device, is made by steel disc or aluminium flake, and the middle aperture that bores links to each other with metal position on the vehicle body by lead.
2. a kind of alarms and security systems for automobiles of cutting off the electricity supply automatically according to claim 1, it is characterized in that: the circuit of described touch detection module and audio alert module comprises voltage comparator, adjustable resistance, first resistance, second resistance, first electric capacity, first Schmidt trigger, second Schmidt trigger, crystal triode, second electric capacity, transistor diode and relay, inverting input 2 pin of voltage comparator link to each other with adjustable resistance, in-phase input end 3 pin of voltage comparator link to each other with touch sensor, be in series with first resistance between mouth 7 pin of voltage comparator and the power supply, mouth 7 pin of voltage comparator link to each other with second resistance, be serially connected with first electric capacity between second resistance and the ground wire, second resistance, first Schmidt trigger and second Schmidt trigger series connection back link to each other with the base stage of crystal triode, second electric capacity and transistor diode parallel connection, the collecting electrode of crystal triode links to each other with the common end of second electric capacity and transistor diode, the common end of another of second electric capacity and transistor diode parallel connection links to each other with power supply, links to each other with the automotive engine power-supply system after relay and the transistor diode parallel connection.
3. a kind of alarms and security systems for automobiles of cutting off the electricity supply automatically according to claim 1 and 2, it is characterized in that: described first Schmidt trigger and second Schmidt trigger adopt 40106 Schmidt triggers.
4. a kind of alarms and security systems for automobiles of cutting off the electricity supply automatically according to claim 1 and 2 is characterized in that: described voltage comparator employing integrated voltage comparator.
5. a kind of alarms and security systems for automobiles of cutting off the electricity supply automatically according to claim 1 and 2 is characterized in that: described relay employing CD4098 relay.
6. a kind of alarms and security systems for automobiles of cutting off the electricity supply automatically according to claim 1 and 2 is characterized in that: described first resistance and second resistance employing RT11 resistance.
7. a kind of alarms and security systems for automobiles of cutting off the electricity supply automatically according to claim 1 and 2 is characterized in that: described first electric capacity employing chemical capacitor, second electric capacity employing ceramic disc capacitor.
8. a kind of alarms and security systems for automobiles of cutting off the electricity supply automatically according to claim 1 and 2, it is characterized in that: described power supply is vehicle-mounted direct supply.
9. a kind of alarms and security systems for automobiles of cutting off the electricity supply automatically according to claim 1 and 2 is characterized in that: described transistor diode employing 1N4001 type transistor diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320047422 CN203032613U (en) | 2013-01-29 | 2013-01-29 | Automatic power-off vehicle anti-theft device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320047422 CN203032613U (en) | 2013-01-29 | 2013-01-29 | Automatic power-off vehicle anti-theft device |
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| Publication Number | Publication Date |
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| CN203032613U true CN203032613U (en) | 2013-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320047422 Expired - Fee Related CN203032613U (en) | 2013-01-29 | 2013-01-29 | Automatic power-off vehicle anti-theft device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105564539A (en) * | 2014-11-05 | 2016-05-11 | 福特全球技术公司 | Proximity-based bicycle alarm |
| CN108528383A (en) * | 2018-03-28 | 2018-09-14 | 余炳顺 | A kind of theft-proof alarm of motor vehicle |
-
2013
- 2013-01-29 CN CN 201320047422 patent/CN203032613U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105564539A (en) * | 2014-11-05 | 2016-05-11 | 福特全球技术公司 | Proximity-based bicycle alarm |
| US10336385B2 (en) | 2014-11-05 | 2019-07-02 | Ford Global Technologies, Llc | Proximity-based bicycle alarm |
| CN108528383A (en) * | 2018-03-28 | 2018-09-14 | 余炳顺 | A kind of theft-proof alarm of motor vehicle |
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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: 20130703 Termination date: 20160129 |
|
| EXPY | Termination of patent right or utility model |