CN207826195U - A kind of vibration signal sensing device for automobile anti-theft alarm - Google Patents
A kind of vibration signal sensing device for automobile anti-theft alarm Download PDFInfo
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- CN207826195U CN207826195U CN201820135675.0U CN201820135675U CN207826195U CN 207826195 U CN207826195 U CN 207826195U CN 201820135675 U CN201820135675 U CN 201820135675U CN 207826195 U CN207826195 U CN 207826195U
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Abstract
The utility model is related to the technical fields of electrical control, disclose a kind of vibration signal sensing device for automobile anti-theft alarm, including electromagnetic inductor, the sensitivity adjustment module being connected with the electromagnetic inductor, the signal amplification module being connected with the sensitivity adjustment module, the comparison amplification module being connected with the signal amplification module, the connected output driving module of amplification module compared with described, the output driving module is connected with indicating module, the electromagnetic inductor is for detecting vibration signal, it converts the vibration signal to electric signal by electromagnetic induction, the signal amplification module is for the electric signal to be amplified, the relatively amplification module is used to compare amplified electric signal with setting electric signal, export the switch control signal of indicating module.The utility model can reduce the probability for the false triggering for causing alarm against theft, and stability, reliability are high.
Description
Technical field
The utility model is related to the technical fields of electrical control, and in particular to a kind of vibration for automobile anti-theft alarm is believed
Number sensing device.
Background technology
Automobile is trip tool common in people's daily life, automobile it is stolen also caused to people it is unnecessary tired
Angry, currently, common car alarm is mounted on automobile extensively, common car alarm is internally provided with
Warning circuit, warning circuit can start alarm lamp and loudspeaker, send out optical signal and voice signal, play anti-theft feature, still
Common car alarm has the disadvantages that：
1, vibration detection is generally carried out using piezoelectric vibration pickup, T shapes counterweight, steel can be used in the oscillator of the sensor
Ball is connected with piezoelectric patches with spring ball, shell and oscillator, in this way it is easy to false triggering be caused, under especially thundering
Rainy day, also, the piezoelectric patches of the sensor is made of ceramic material, when welding, are fragile.
2, subsequent amplifying circuit is generally amplified output using common triode, and amplification band is arrived in 1KHZ
The probability of 10KHZ, false triggering are big, especially for the sound that thunder etc. is sharp.
Utility model content
The utility model provides a kind of vibration signal sensing device for automobile anti-theft alarm, solves existing automobile
The problems such as false triggering probability of burglar alarm is big, short life.
The utility model can be achieved through the following technical solutions：
A kind of vibration signal sensing device for automobile anti-theft alarm, including electromagnetic inductor, with the electromagnetic induction
The connected sensitivity adjustment module of device, the signal amplification module being connected with the sensitivity adjustment module amplify with the signal
The connected comparison amplification module of module, the connected output driving module of amplification module, the output driving module compared with described
It is connected with indicating module, the electromagnetic inductor is converted the vibration signal by electromagnetic induction for detecting vibration signal
For electric signal, the signal amplification module is for the electric signal to be amplified, and the relatively amplification module will be for that will amplify
Electric signal afterwards exports the switch control signal of indicating module compared with setting electric signal.
Further, the electromagnetic inductor includes hollow cylindrical body, and one end of the cylindrical body is set as
Cecum, the other end are set as open end, and the surface of the cecum is provided with the coil that enameled wire is coiled into, is internally provided with magnetic core,
The open end is internally provided with iron core, and port is sealed by flexible silicon blob of viscose, and the magnetic core and iron core can be in cylinders
Freely activity, the coil are connected with sensitivity adjustment module in shape ontology.
Further, by Voltage stabilizing module, the amplification module compared with is connected the signal amplification module, and the signal amplifies mould
The normal phase input end of block including the first operational amplifier LM358, the first operational amplifier LM358 by divider resistance R5 with
Power supply is connected, and negative-phase input is connected by resistance R12 with the output end of sensitivity adjustment module, and output end passes through resistance R11
It is connected with negative-phase input；The Voltage stabilizing module includes detector diode D2 and detection capacitance C4；The relatively amplification module packet
Include second operational amplifier LM358, the normal phase input end of the second operational amplifier LM358 and the output end phase of Voltage stabilizing module
Even, negative-phase input is connected by divider resistance R4 with power supply, output end by resistance R6, capacitance C2, diode D4 and D3 and
Normal phase input end is connected.
Further, the output driving module includes triode Q1, the collector of the triode Q1 by resistance R1 with
Indicating module is connected, and base stage is connected by resistance R2 with the output end of operational amplifier, and emitter is directly grounded.
Further, the indicating module includes LED light.
Further, the adjustment of sensitivity module includes the variable resistance VR being connected with electromagnetic inductor.
The utility model is beneficial to be had technical effect that：
Using electromagnetic induction principle, by be arranged in cylindrical body can freely movable magnetic core and iron core, and
It is wound on the coil on cylindrical body surface, by faint vibration signal such as 20HZ to 1KHZ converted electricals number, completion is shaken to faint
The detection of dynamic signal, reduces the probability for the false triggering for causing alarm against theft, and three common poles are replaced using operational amplifier
Pipe carries out signal amplification, multilevel iudge, and then exports control signal, improves the reliability and stability of device, also, entire dress
The structure set is simple, and application is strong, convenient for promoting.
Description of the drawings
Fig. 1 is that the circuit of the utility model connects block diagram；
Fig. 2 is the physical circuit connection figure of the utility model；
Fig. 3 is the structural schematic diagram of the electromagnetic inductor of the utility model.
Specific implementation mode
With reference to the accompanying drawings and embodiments, specific embodiment of the present utility model is described in detail.
With reference to attached Fig. 1 and 2, the utility model provides a kind of vibration signal sensing device for automobile anti-theft alarm,
Including electromagnetic inductor, the sensitivity adjustment module being connected with the electromagnetic inductor, the letter being connected with the sensitivity adjustment module
Number amplification module, the comparison amplification module being connected with the signal amplification module, compared with this is stated the connected output of amplification module drive
Dynamic model block, the output driving module are connected with indicating module, which passes through electromagnetic induction for detecting vibration signal
Convert vibration signal to electric signal, for electric signal to be amplified, which is used for the signal amplification module
Amplified electric signal is compared with setting electric signal, exports the switch control signal of indicating module.
The electromagnetic inductor includes hollow cylindrical body, and one end of the cylindrical body is set as cecum, the other end
It is set as open end, the surface of cecum is provided with the coil that enameled wire is coiled into, is internally provided with magnetic core, the inside in open end
Be arranged cored, port is sealed by flexible silicon blob of viscose, the magnetic core and iron core can the freely activity in cylindrical body, should
The silica gel that flexible silicon blob of viscose uses hardness ratio to be spent by 65 degree+30 is made, and elasticity is good, in iron core due to vibrating contact resilient
When silica gel block, generation is least, improves the verification and measurement ratio of vibration signal, which uses the polyurethane of 2UEW 0.06mm specifications
Enameled wire, good insulation preformance.
The sensitivity adjustment module includes the variable resistance VR being connected with coil, and variable resistance VR passes through capacitance C7, C6
It is connected with signal amplification module.
By Voltage stabilizing module, the amplification module compared with is connected the signal amplification module, which includes the first fortune
Amplifier LM358 is calculated, the normal phase input end of first operational amplifier LM358 is connected by divider resistance R5 with power supply, negative
Input terminal is connected by resistance R12 with the output end of sensitivity adjustment module, and output end passes through resistance R11 and negative-phase input phase
Even；The Voltage stabilizing module includes detector diode D2 and detection capacitance C4；The comparison amplification module includes second operational amplifier
The normal phase input end of LM358, second operational amplifier LM358 are connected with the output end of Voltage stabilizing module, and negative-phase input passes through
Divider resistance R4 is connected with power supply, and output end is connected by resistance R6, capacitance C2, diode D4 and D3 with normal phase input end.
The output driving module includes triode Q1, and the collector of triode Q1 passes through resistance R1 and indicating module phase
Even, base stage is connected by resistance R2 with the output end of operational amplifier, and emitter is directly grounded.
The indicating module includes LED light, can also use other kinds of alarm, such as loudspeaker.
The operation principle of the utility model is as follows：
When there is Vibration Signal in Frequency Domain in the external world, Vibration Signal in Frequency Domain is converted to low current signal by electromagnetic inductor, electricity
The size for flowing signal is directly related with the amplitude of extraneous vibration；The current signal is via adjustable potentiometer VR, by capacitance C7
100NF is coupled to the 2nd foot of the first operational amplifier of signal amplification module, which amplifies for negative-feedback
Device, amplification factor is relevant with the value of resistance R11 6.8M and R12 47K, when the more big then amplification factors of R11 are higher；First fortune
The 3rd foot for calculating amplifier is meeting biased electrical presser feet, and required voltage divides gained by divider resistance R5 from power supply；First operation
1st foot of amplifier is output pin, and the signal of the output pin passes through detector diode D2 1N4148 and detection capacitance C4
After 0.47UF, obtains a stable voltage signal and export to the 5th foot of the second operational amplifier for comparing amplification module, work as inspection
When the voltage of vibration signal after wave is higher than the 6th foot voltage of second operational amplifier, then the 7th foot of output pin can export a height
Otherwise level can export a low level.In the presence of the 7th foot of second operational amplifier has high level, then triode is driven
Meeting saturation conduction causes output port to export low level, meanwhile, the LED light of indicating module can shine, and indicate vibration signal production
It is raw.
The utility model utilize electromagnetic induction principle, by cylindrical body be arranged can freely movable magnetic core and
Iron core, and it is wound on the coil on cylindrical body surface, faint vibration signal such as 20HZ to 1KHZ converted electricals number are completed
Detection to Vibration Signal in Frequency Domain reduces the probability for the false triggering for causing alarm against theft, is replaced using operational amplifier general
Logical triode carries out signal amplification, multilevel iudge, and then exports control signal, improves the reliability and stability of device, and
And the structure of whole device is simple, application is strong, convenient for promoting.
Although the foregoing describe specific embodiment of the present utility model, it will be appreciated by those of skill in the art that
These are merely examples, under the premise of without departing substantially from the principles of the present invention and essence, can be done to these embodiments
Go out various changes or modifications, therefore, the scope of protection of the utility model is defined by the appended claims.
Claims (6)
1. a kind of vibration signal sensing device for automobile anti-theft alarm, it is characterised in that：It is and described including electromagnetic inductor
The connected sensitivity adjustment module of electromagnetic inductor, the signal amplification module being connected with the sensitivity adjustment module are and described
The connected comparison amplification module of signal amplification module, the connected output driving module of amplification module, the output compared with described
Drive module is connected with indicating module, and the electromagnetic inductor is for detecting vibration signal, by electromagnetic induction by the vibration
Signal is converted into electric signal, and the signal amplification module for the electric signal to be amplified, use by the relatively amplification module
In amplified electric signal compares with setting electric signal, the switch control signal of indicating module is exported.
2. the vibration signal sensing device according to claim 1 for automobile anti-theft alarm, it is characterised in that：The electricity
Magnetic inductor includes hollow cylindrical body, and one end of the cylindrical body is set as cecum, and the other end is set as open
End, the surface of the cecum are provided with the coil that enameled wire is coiled into, are internally provided with magnetic core, and the open end is internally provided with
Iron core, port are sealed by flexible silicon blob of viscose, and the magnetic core and iron core can be freely movable in cylindrical body, the line
Circle is connected with sensitivity adjustment module.
3. the vibration signal sensing device according to claim 1 for automobile anti-theft alarm, it is characterised in that：The letter
The amplification module compared with is connected by Voltage stabilizing module for number amplification module, and the signal amplification module includes the first operational amplifier
The normal phase input end of LM358, the first operational amplifier LM358 are connected by divider resistance R5 with power supply, negative-phase input
It is connected with the output end of sensitivity adjustment module by resistance R12, output end is connected by resistance R11 with negative-phase input；Institute
It includes detector diode D2 and detection capacitance C4 to state Voltage stabilizing module；The relatively amplification module includes second operational amplifier
The normal phase input end of LM358, the second operational amplifier LM358 are connected with the output end of Voltage stabilizing module, and negative-phase input is logical
It crosses divider resistance R4 with power supply to be connected, output end is connected by resistance R6, capacitance C2, diode D4 and D3 with normal phase input end.
4. the vibration signal sensing device according to claim 3 for automobile anti-theft alarm, it is characterised in that：It is described defeated
It includes triode Q1 to go out drive module, and the collector of the triode Q1 is connected by resistance R1 with indicating module, and base stage passes through
Resistance R2 is connected with the output end of operational amplifier, and emitter is directly grounded.
5. the vibration signal sensing device according to claim 4 for automobile anti-theft alarm, it is characterised in that：The finger
Show that module includes LED light.
6. the vibration signal sensing device according to claim 1 for automobile anti-theft alarm, it is characterised in that：The spirit
Sensitivity adjustment module includes the variable resistance VR being connected with electromagnetic inductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820135675.0U CN207826195U (en) | 2018-01-26 | 2018-01-26 | A kind of vibration signal sensing device for automobile anti-theft alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820135675.0U CN207826195U (en) | 2018-01-26 | 2018-01-26 | A kind of vibration signal sensing device for automobile anti-theft alarm |
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| Publication Number | Publication Date |
|---|---|
| CN207826195U true CN207826195U (en) | 2018-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820135675.0U Expired - Fee Related CN207826195U (en) | 2018-01-26 | 2018-01-26 | A kind of vibration signal sensing device for automobile anti-theft alarm |
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| CN (1) | CN207826195U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114179748A (en) * | 2021-12-02 | 2022-03-15 | 深圳市源立信照明科技有限公司 | Vehicle-mounted alarm device and control method thereof |
-
2018
- 2018-01-26 CN CN201820135675.0U patent/CN207826195U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114179748A (en) * | 2021-12-02 | 2022-03-15 | 深圳市源立信照明科技有限公司 | Vehicle-mounted alarm device and control method thereof |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180907 Termination date: 20220126 |
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| CF01 | Termination of patent right due to non-payment of annual fee |