CN204998486U - Alarm with vibration alarming function - Google Patents
Alarm with vibration alarming function Download PDFInfo
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- CN204998486U CN204998486U CN201520673313.3U CN201520673313U CN204998486U CN 204998486 U CN204998486 U CN 204998486U CN 201520673313 U CN201520673313 U CN 201520673313U CN 204998486 U CN204998486 U CN 204998486U
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Abstract
The utility model discloses an alarm with vibration alarming function, including master control MCU, its characterized in that still includes the vibration detection circuit, vibration detection circuit involving vibrations signal generating circuit, filtering shaping circuit and signal amplification circuit, vibration signal generating circuit's vibration signal output part connects master control MCU's vibration signal input part through filtering shaping circuit connection signal amplification circuit's signal input part, signal amplification circuit's signal output part. The advantage lies in, integrated filtering and amplifier circuit after, the control to sensitivity has improved greatly. The microvibration signal that vibration signal generator sent can be through inputing master control MCU behind the filter amplifier, master control MCU just can judge whether drive alarm device according to the condition of synthesis. And the simple structure of this circuit, the consumption is very low, helps practicing thrift car electric power.
Description
Technical field
The utility model relates to a kind of car alarm, especially designs a kind of Car Burglar Alarm with vibration alarming function.
Background technology
Car alarm is an important component part of field of automobile safety, and the most important abnormal signal source of Car Burglar Alarm is exactly vibration signal.The receiving sensitivity of current Car Burglar Alarm vibration signal is unstable, or the too high easy wrong report of sensitivity; Or sensitivity is too low easily fails to report.That sensitivity is too high or too low all can to everyone damnous willing energy of automobile.
Utility model content
The utility model object is to provide a kind of sensitivity to stablize, and the Car Burglar Alarm of low-power consumption.
A kind of Car Burglar Alarm with vibration alarming function described in the utility model, comprises main control MCU, it is characterized in that, go back involving vibrations testing circuit, described vibration detection circuit involving vibrations signal generating circuit, filtering shaping circuit and signal amplification circuit; The vibration signal mouth of vibration signal circuit for generating passes through the signal input part of filtering shaping circuit connection signal amplifying circuit, and the signal output part of signal amplification circuit connects the vibration signal input end of main control MCU.
Described vibration signal circuit for generating is made up of the first resistance, the second resistance and vibration signal producer; DC supply input connects ground connection after the first resistance, the second resistance and vibration signal producer successively; The point of connection of the first resistance and the second resistance is vibration signal mouth.
Described filtering shaping circuit comprises the first electric capacity, diode and secondary π type filter circuit; Described first electric capacity one end is signal input part, in addition ground connection after one end reversal connection diode; Diode cathode is connected one end of secondary π type filter circuit with the point of connection of the first electric capacity, other one end of secondary π type filter circuit is signal output part.
Described signal amplification circuit comprises the 3rd resistance and field effect transistor, and described fet gate is signal input part, drains as signal output part, drains to connect direct supply, source ground by the 3rd resistance.
The utility model advantage is, after incorporating filtering and amplifying circuit, substantially increases the control to sensitivity.The microvibration signal that vibration signal producer sends can by being input to main control MCU after filter and amplification, and main control MCU just can determine whether to drive warning device according to comprehensive condition.And the structure of this circuit is simple, and power consumption is very low, contribute to saving vehicle electric power.
Accompanying drawing explanation
Fig. 1 is vibration detection circuit structural representation of the present utility model.
Detailed description of the invention
A kind of Car Burglar Alarm with vibration alarming function described in the utility model, comprises main control MCU, goes back involving vibrations testing circuit, described vibration detection circuit involving vibrations signal generating circuit, filtering shaping circuit and signal amplification circuit; The vibration signal mouth of vibration signal circuit for generating passes through the signal input part of filtering shaping circuit connection signal amplifying circuit, and the signal output part of signal amplification circuit connects the vibration signal input end SENSOR_IN of main control MCU.
As shown in Figure 1, described vibration signal circuit for generating is made up of the first resistance R1, the second resistance R2 and vibration signal producer U1; DC supply input connects ground connection after the first resistance R1, the second resistance R2 and vibration signal producer U1 successively; The point of connection of the first resistance R1 and the second resistance R2 is vibration signal mouth.
Described filtering shaping circuit comprises the first electric capacity C1, diode D1 and secondary π type filter circuit; Described first electric capacity C1 one end is signal input part, in addition ground connection after one end reversal connection diode D1; Diode D1 positive pole is connected one end of secondary π type filter circuit with the point of connection of the first electric capacity C1, other one end of secondary π type filter circuit is signal output part.Described secondary π type filtered electrical routing resistance R4/R5 and electric capacity C2 forms, and the two ends of resistance R4 are the two ends of secondary π type filter circuit, and resistance R4 one end is by resistance R5 ground connection, and the other one end of resistance R4 is by electric capacity C2 ground connection.
Described signal amplification circuit comprises the 3rd resistance R3 and field effect transistor S1, and described field effect transistor S1 grid is signal input part, drains as signal output part, drains to connect direct supply, source ground by the 3rd resistance R3.
Principle of work is, is installed on by Car Burglar Alarm on automobile chassis frame, when automobile generation abnormal vibrations, triggers vibration signal producer U1 work, produces small signal export at the point of connection of the first resistance R1 and the second resistance R2.This output signal is by arriving the grid of field effect transistor S1 after filter rectifier, the change of signal causes the change of grid voltage, thus causes the turn-on effect of field effect transistor S1 that relatively large change occurs.This change is drawn out to main control MCU as the vibration signal input be exaggerated in drain electrode.
For a person skilled in the art, according to technical scheme described above and design, other various corresponding change and distortion can be made, and all these change and distortion all should belong within the protection domain of the utility model claim.
Claims (4)
1. there is a Car Burglar Alarm for vibration alarming function, comprise main control MCU, it is characterized in that, go back involving vibrations testing circuit, described vibration detection circuit involving vibrations signal generating circuit, filtering shaping circuit and signal amplification circuit; The vibration signal mouth of vibration signal circuit for generating passes through the signal input part of filtering shaping circuit connection signal amplifying circuit, and the signal output part of signal amplification circuit connects the vibration signal input end of main control MCU.
2. Car Burglar Alarm according to claim 1, is characterized in that, described vibration signal circuit for generating is made up of the first resistance, the second resistance and vibration signal producer; DC supply input connects ground connection after the first resistance, the second resistance and vibration signal producer successively; The point of connection of the first resistance and the second resistance is vibration signal mouth.
3. Car Burglar Alarm according to claim 1, is characterized in that, described filtering shaping circuit comprises the first electric capacity, diode and secondary π type filter circuit; Described first electric capacity one end is signal input part, in addition ground connection after one end reversal connection diode; Diode cathode is connected one end of secondary π type filter circuit with the point of connection of the first electric capacity, other one end of secondary π type filter circuit is signal output part.
4. Car Burglar Alarm according to claim 1, is characterized in that, described signal amplification circuit comprises the 3rd resistance and field effect transistor, described fet gate is signal input part, drain electrode is for signal output part, and draining connects direct supply, source ground by the 3rd resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520673313.3U CN204998486U (en) | 2015-08-31 | 2015-08-31 | Alarm with vibration alarming function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520673313.3U CN204998486U (en) | 2015-08-31 | 2015-08-31 | Alarm with vibration alarming function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204998486U true CN204998486U (en) | 2016-01-27 |
Family
ID=55155390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520673313.3U Active CN204998486U (en) | 2015-08-31 | 2015-08-31 | Alarm with vibration alarming function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204998486U (en) |
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2015
- 2015-08-31 CN CN201520673313.3U patent/CN204998486U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |