CN203798446U - Vibration detection circuit - Google Patents
Vibration detection circuit Download PDFInfo
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- CN203798446U CN203798446U CN201320355560.XU CN201320355560U CN203798446U CN 203798446 U CN203798446 U CN 203798446U CN 201320355560 U CN201320355560 U CN 201320355560U CN 203798446 U CN203798446 U CN 203798446U
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- signal
- circuit
- vibration detection
- vibration
- amplifying
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Abstract
The utility model discloses a vibration detection circuit comprising a signal acquiring circuit for converting a pressure signal of vibration into an electric signal, a signal coupling circuit for transferring an AC signal and isolating a DC signal, and a filtering and amplifying circuit for filtering and amplifying a coupled signal outputted by the signal coupling circuit. The signal coupling circuit comprises a microphone and a coupling capacitor. The filtering and amplifying circuit comprises a first amplification circuit for amplifying the coupled signal and a second amplification circuit for filtering and shaping an amplified signal. The vibration detection circuit uses the microphone as a vibration detection element and has characteristics of a long service life, low power consumption, low cost, and small size.
Description
Technical field
The application relates to a kind of electronic installation, more specifically, relates to a kind of vibration detection circuit.
Background technology
Existing vibration detection technology has the principle of inertia based on object, and the principle that adds electromagnetism by machinery or machinery realizes, or adopts the principle that the photoelectricity of certain objects is irradiated, and the photosignal of the variation producing during by object of which movement is realized.
Adopt the principle of inertia of object, the principle that adds electromagnetism by machinery or machinery realizes vibration detection, because the restriction of mechanism structure original life is (as vibrating spring, vibration ball etc., conventionally detect the life-span 100,000 left and right), cannot meet the vibration detection requirement of the long-term moving objects such as automobile; Adopt the principle that the photoelectricity of certain objects is irradiated, the photosignal of the variation producing during by object of which movement is realized vibration detection, detect object and be necessary for the object with respect to sensor movement, and have that product power consumption is large, cost is high, volume is large, etc. defect, cannot meet the vibration detection requirement of the moving objects such as automobile.
Summary of the invention
The utility model provides a kind of vibration detection circuit, and described vibration detection circuit comprises:
Signal pickup circuit: the pressure signal of vibration is converted to electric signal;
Signal coupling circuit: the electric signal to signal pickup circuit output transmits the processing of AC signal isolated DC signal;
Filter amplification circuit: the coupled signal to signal coupling circuit output carries out filter and amplification;
Described signal pickup circuit comprises signal detection component miaow head, and described miaow head contacts with vibration source, the pressure that induction vibration source produces miaow head because of vibration, and pressure signal is converted to electric signal;
Signal pickup circuit also comprises the sample circuit that miaow head output signal is sampled;
Signal coupling circuit comprises the coupling capacitance between output terminal and the filter amplification circuit that is connected to miaow head;
Filter amplification circuit comprises the first amplifying circuit that signal after being coupled is amplified and the second amplifying circuit that amplified signal is carried out to filter shape.
The utility model adopts miaow head to do vibration detecting element and forms vibration detection circuit, thereby has long service life, and power consumption is little, and cost is low, the feature that volume is little.
Brief description of the drawings
Fig. 1 is vibration detection circuit structured flowchart;
Fig. 2 is filter amplification circuit structured flowchart;
Fig. 3 is the circuit theory diagrams of the utility model embodiment.
Embodiment
By reference to the accompanying drawings the utility model is described in further detail below by embodiment.
The utility model provides a kind of vibration detection circuit, and as shown in Figure 1, described vibration detection circuit comprises signal pickup circuit 10, signal coupling circuit 11, filter amplification circuit 12; The pressure signal of vibration is converted to electric signal by signal pickup circuit 10; Signal coupling circuit 11 transmits the processing of AC signal isolated DC signal to the electric signal of signal pickup circuit output; Filter amplification circuit 12 is carried out filter and amplification to the coupled signal of signal coupling circuit output.
As shown in Figure 3, signal pickup circuit 10 comprises miaow head M1, and miaow head M1 contacts with vibration source, the pressure that induction vibration source produces miaow head because of vibration, and pressure signal is converted to electric signal; Signal pickup circuit 10 also comprises the first sampling resistor R1, the second sampling resistor R2, the first sampling resistor R1 and the second sampling resistor R2 series connection, electric signal to miaow head M1 output is sampled, electric signal after sampling outputs to signal coupling circuit 11, be specially, first sampling resistor R1 one end connects power supply, and the other end is connected with the output terminal of the second sampling resistor R2 and miaow head M1; The second sampling resistor R2 other end is connected to ground.
Signal coupling circuit 11 comprises the coupling capacitance C1 between output terminal and the filter amplification circuit 12 that is connected to miaow head M1, coupling capacitance C1 processes the output signal of signal pickup circuit 10, transmit AC signal isolated DC signal, and signal after treatment is outputed to filter amplification circuit 12.
As shown in Figure 2, described filter amplification circuit 12 comprises the first amplifying circuit 20 and the second amplifying circuit 21.Described the first amplifying circuit 20 amplifies signal after being coupled, and the second amplifying circuit 21 carries out filter shape to amplified signal.Wherein the first amplifying circuit 20 comprises the 3rd resistance R 3, the 4th resistance R 4 and the first triode Q1.As shown in Figure 3, the 3rd resistance R 3 one termination powers, the other end is connected with the base stage of the first triode Q1; The 4th resistance R 4 one termination powers, the other end is connected with the collector of the first triode Q1; The emitter of the first triode Q1 is connected to ground, and collector output amplifying signal is to the second amplifying circuit.Wherein the second amplifying circuit comprises the second capacitor C 2 and the second triode Q2.As shown in Figure 3, the grounded emitter of one end of the second capacitor C 2 and the second triode Q2, second capacitor C 2 other ends are connected with the second triode Q2 base stage; The second triode Q2 base stage receives the output signal of the first amplifying circuit, collector output signal.
Miaow head is applied to the fields such as sound detection conventionally, has minimum power consumption, and working current is about 0.1mA-0.5mA, has polytype encapsulation, is convenient to install and use.The utility model is generalized to vibration detection field by the application of this element by sound detection field, for the vibration detection of moving object.According to the difference of vibration frequency, adjust the frequency range of miaow head and the parameter of vibration detection circuit, use the vibration detection effect of moving object to reach optimum condition.Form vibration detection circuit owing to adopting miaow head to do vibration detecting element, thereby have long service life, power consumption is little, and cost is low, the feature that volume is little.
Above content is in conjunction with concrete embodiment further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, can also make some simple deduction or replace.
Claims (7)
1. a vibration detection circuit, is characterized in that, described vibration detection circuit comprises:
Signal pickup circuit: the pressure signal of vibration is converted to electric signal;
Signal coupling circuit: the electric signal to signal pickup circuit output transmits the processing of AC signal isolated DC signal;
Filter amplification circuit: the coupled signal to signal coupling circuit output carries out filter and amplification;
Described signal pickup circuit comprises signal detection component miaow head, and described miaow head contacts with vibration source, the pressure that induction vibration source produces miaow head because of vibration, and pressure signal is converted to electric signal.
2. vibration detection circuit as claimed in claim 1, is characterized in that, described signal pickup circuit also comprises the sample circuit that the output signal of miaow head is sampled.
3. vibration detection circuit as claimed in claim 2, is characterized in that, described sample circuit comprises the first sampling resistor and first sampling resistor of series connection, and first sampling resistor one end connects power supply, and the other end is connected with the second sampling resistor and miaow head output terminal; The second sampling resistor other end is connected to ground.
4. vibration detection circuit as claimed in claim 1, is characterized in that, described signal coupling circuit comprises the coupling capacitance between output terminal and the filter amplification circuit that is connected to miaow head.
5. vibration detection circuit as claimed in claim 1, is characterized in that, described filter amplification circuit comprises the first amplifying circuit that signal after being coupled is amplified and the second amplifying circuit that amplified signal is carried out to filter shape.
6. vibration detection circuit as claimed in claim 5, is characterized in that, described the first amplifying circuit comprises the 3rd resistance, the 4th resistance and the first triode; Described the 3rd resistance one termination power, the other end is connected with the base stage of the first triode; The 4th resistance one termination power, the other end is connected with the collector of the first triode; The emitter of the first triode is connected to ground, and collector output amplifying signal is to the second amplifying circuit.
7. vibration detection circuit as claimed in claim 5, is characterized in that, described the second amplifying circuit comprises the second electric capacity and the second triode; The grounded emitter of one end of the second electric capacity and the second triode, the second electric capacity other end is connected with the second transistor base; The second transistor base receives the output signal of the first amplifying circuit, collector output signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320355560.XU CN203798446U (en) | 2013-06-20 | 2013-06-20 | Vibration detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320355560.XU CN203798446U (en) | 2013-06-20 | 2013-06-20 | Vibration detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203798446U true CN203798446U (en) | 2014-08-27 |
Family
ID=51380651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320355560.XU Expired - Fee Related CN203798446U (en) | 2013-06-20 | 2013-06-20 | Vibration detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203798446U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107449506A (en) * | 2017-08-30 | 2017-12-08 | 贵州省智能崛起科技有限公司 | A kind of vibration detection device and method for detecting vibration for rolling door axle |
| CN108106715A (en) * | 2017-12-26 | 2018-06-01 | 中国科学院长春光学精密机械与物理研究所 | AC regeneration laser sound measurement method and device |
| CN108534886A (en) * | 2018-03-09 | 2018-09-14 | 深圳市晟瑞科技有限公司 | A kind of vibrating sensor and intelligence control system |
-
2013
- 2013-06-20 CN CN201320355560.XU patent/CN203798446U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107449506A (en) * | 2017-08-30 | 2017-12-08 | 贵州省智能崛起科技有限公司 | A kind of vibration detection device and method for detecting vibration for rolling door axle |
| CN108106715A (en) * | 2017-12-26 | 2018-06-01 | 中国科学院长春光学精密机械与物理研究所 | AC regeneration laser sound measurement method and device |
| CN108534886A (en) * | 2018-03-09 | 2018-09-14 | 深圳市晟瑞科技有限公司 | A kind of vibrating sensor and intelligence control system |
| CN108534886B (en) * | 2018-03-09 | 2024-02-23 | 深圳市晟瑞科技有限公司 | Vibration sensor and intelligent control system |
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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: 20140827 Termination date: 20160620 |
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| CF01 | Termination of patent right due to non-payment of annual fee |