CN102042867B - Shock detection circuit - Google Patents
Shock detection circuit Download PDFInfo
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- CN102042867B CN102042867B CN 201010570753 CN201010570753A CN102042867B CN 102042867 B CN102042867 B CN 102042867B CN 201010570753 CN201010570753 CN 201010570753 CN 201010570753 A CN201010570753 A CN 201010570753A CN 102042867 B CN102042867 B CN 102042867B
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- pass filter
- shock
- detection circuit
- shock sensor
- input end
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- 230000035939 shock Effects 0.000 title claims abstract description 70
- 238000001514 detection method Methods 0.000 title claims abstract description 35
- 238000001914 filtration Methods 0.000 claims abstract description 5
- 239000003990 capacitor Substances 0.000 claims description 9
- 230000003068 static effect Effects 0.000 claims description 4
- 230000001960 triggered effect Effects 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The invention provides a shock detection circuit, comprising a power supply, a shock sensor, a low pass filter, a bumper and a controller, wherein the shock sensor is conducted when a target to be detected is stationary, and the shock sensor is disconnected when the target to be detected moves; the low pass filter is used for filtering error detection of the shock sensor and fine shock of the target to be detected, a first input end of the low pass filter is connected with the power supply, and a second input end of the low pass filter is connected with one end of the shock sensor; the input end of the bumper is connected with the output end of the low pass filter; and the input end of the controller is connected with the output end of the bumper. When the output signal of the low pass filter reaches a trigger threshold value, the bumper triggers the controller to generate an alarm output signal. Based on the above structure, after the moving and the shock are detected by the shock detection circuit provided by the invention, an alarm signal can be sent out in time, and trigger conditions can be adjusted in accordance with specialties of different occasions; and in addition, the shock detection circuit can serve as a subsystem to be applied to different occasions and products.
Description
[technical field]
The present invention relates to a kind of testing circuit, particularly a kind of shock detection circuit.
[background technology]
Whether the shock detection device is a kind of range of application electronic installation more widely, shake or movement for detection of detected material, and when moving when the detected material vibrations or by external force, pick-up unit will send alarm signal.The shock detection device is electronic signal with the signal transition of vibrations, is convenient to the signals collecting of various automatic monitoring systems.Shock detection device in the market exists that power consumption is big, sensitivity is low because design is reasonable inadequately, and shortcoming that can not adjustment trigger conditions.
[summary of the invention]
The technical problem to be solved in the present invention provides a kind of shock detection circuit of sensitivity.
The present invention solves the problems of the technologies described above the technical scheme that adopts: a kind of shock detection circuit is provided, comprises power supply; Shock sensor, shock sensor conducting when measured target is static, shock sensor disconnected when measured target moved; Low-pass filter is used for the flase drop survey of filtering shock sensor and the trickle vibrations of measured target, and the first input end of low-pass filter connects power supply, and its second input end links to each other with an end of shock sensor; Impact damper, the input end of impact damper is connected in the output terminal of low-pass filter; Controller, the input end of controller is connected in the output terminal of impact damper,, controller is connected with external system by connector; With gate device, link to each other with connector with controller respectively with two input ends of gate device, be connected the pin that enables of power supply with the output terminal of gate device, wherein, when the output signal of low-pass filter reaches trigger gate in limited time, impact damper triggers controller and produces the alarm output signal.
According to a preferred embodiment of the invention, shock sensor is ball switch or snap switch.
According to a preferred embodiment of the invention, controller is single-chip microcomputer.
According to a preferred embodiment of the invention, low-pass filter comprises resistance R 1 and capacitor C 1, resistance R 1 and capacitor C 1 are arranged in parallel between the first input end and output terminal of low-pass filter, and current-limiting resistance R2 is arranged between second input end and output terminal of low-pass filter.
According to a preferred embodiment of the invention, the capacitance of the resistance of resistance R 1, R2 and capacitor C 1 is adjustable.
According to a preferred embodiment of the invention, the output signal of low-pass filter reaches trigger gate in limited time, and impact damper is exported a logic level signal and triggered controller generation alarm output signal.
According to a preferred embodiment of the invention, impact damper is the phase inverter of band schmidt trigger.
According to a preferred embodiment of the invention, the other end ground connection of shock sensor, the potential difference (PD) during the shock sensor conducting between its two ends is zero, between its two ends potential difference (PD) is arranged when shock sensor disconnects.
By the way, shock detection circuit of the present invention can in time send alarm signal, and can come adjustment trigger conditions according to the characteristic of different application occasion after detecting mobile or shaking, and can be used for different application occasion and product as subsystem.
[description of drawings]
Fig. 1 is the circuit diagram of the shock detection circuit of one embodiment of the present invention; And
Fig. 2 is the V1 and the voltage curve of V2 point under different shock conditions among Fig. 1.
[embodiment]
The present invention is described in detail below in conjunction with drawings and Examples.
Fig. 1 is the circuit diagram of the shock detection circuit of one embodiment of the present invention.As shown in Figure 1, shock detection circuit of the present invention comprises: power supply U3, shock sensor U4, low-pass filter U6, impact damper U1 controller U2 and with gate device U5.
Wherein, shock sensor U4 conducting when measured target is static, shock sensor U4 disconnects when measured target moves.The end of shock sensor U4 links to each other with low-pass filter U6.During shock sensor U4 conducting between its two ends is Low ESR, is the approaching high impedance that insulate when shock sensor disconnects between its two ends.One end and other end potential difference (PD) are zero when shock sensor U4 conducting, and one end and the other end had potential difference (PD) when shock sensor U4 disconnected.Shock sensor U4 can be ball switch or snap switch.In the present embodiment, shock sensor U4 is ball switch, the other end ground connection of shock sensor U4, and when measured target was static, U4 was in conducting state, made V2 point and ground conducting, and the V2 point voltage is zero; When U4 disconnected, the V2 point voltage was the output voltage V CC of power supply U3.When measured target vibrations or when being moved, U4 is shaken and is constantly switched with disconnecting between two states in conducting, thereby constantly disconnects being connected of V2 and GND, measured target shake or be moved more strong, this switching of V2 will be more frequent.
Low-pass filter U6 is used for the flase drop survey of filtering U4 and the trickle vibrations of measured target, and the first input end of U6 links to each other with power supply U3, and its second input end links to each other with the end of shock sensor U4.In the present embodiment, low-pass filter U6 comprises resistance R 1 and capacitor C 1, and resistance R 1 and capacitor C 1 are arranged in parallel between the first input end and output terminal of low-pass filter U6.The resistance R 2 that is used for current limliting is series between second input end and output terminal of low-pass filter U6.Wherein, the capacitance of the resistance of resistance R 1, R2 and capacitor C 1 is adjustable.
The input end of impact damper U1 is connected in the output terminal of low-pass filter U6.Impact damper U1 is used for providing higher input impedance, with the output signal V1 to low-pass filter U6 minimum influence is arranged, and is raised to trigger gate at the output signal V1 of low-pass filter U6 and exports a logic level signal in limited time.Impact damper U1 can be non-inverting buffer or phase inverter.In the present embodiment, impact damper U1 is the phase inverter of band schmidt trigger.
The input end of controller U2 is connected in the output terminal of impact damper U1.In the present embodiment, controller U2 is single-chip microcomputer, and controller U2 comprises connector J1, and controller U2 is connected with the main system of outside by connector J1.
Link to each other with the connector J1 of controller U2 with controller U2 respectively with two input ends of gate device U5, be connected the pin that enables of power supply U3 with the output terminal of gate device U5.
Fig. 2 is V1 point and the voltage curve of V2 point under different shock conditions among Fig. 1.As shown in Figure 2, though extraneous trickle vibrations also may trigger the U4 vibrations, V2 voltage also has the variation from GND to VCC, and R1 and C1 can filter out this trickle vibrations, do not trigger impact damper U1.Have only after vibrations acquire a certain degree, the waveform of V2 reaches certain frequency and continues for some time, and makes V1 voltage finally rise to trigger gate in limited time, just can trigger impact damper U1.Shake more severely, the change frequency of V2 waveform is just more high, and under same filtering condition, V1 rises to that to trigger the required time of thresholding just more short.Change the resistance value of R1 or the capacitance of C1, can change the time that V1 rises, thereby adjust the detection sensitivity of shock detection circuit of the present invention.Therefore, resistance value that can be by changing R1 or the capacitance of C1 with shock detection circuit application of the present invention in required detection sensitivity different application scenario or product.
Shock detection circuit of the present invention has only the vibrations when measured target to acquire a certain degree, and the voltage that V1 is ordered rises to trigger gate in limited time, just can alarm to controller U2 by triggering the interruption of controller U2 after the phase inverter U1 shaping of band schmidt trigger.
Shock detection circuit of the present invention can be used as subsystem, is connected with the main system of outside by connector J1.When being connected with main system, can producing after U2 is triggered and interrupt output, J1 wakes main system up by connector, and can communicate by letter with main system by the I2C bus, accepts the control command of main system.
In addition, the power consumption in the time of can adjusting the U4 conducting by the resistance value of adjusting R1, R2 is to prolong the service time of power supply U3.For better being applicable to different product, the product that particularly power consumption is had requirement, main system and U2 can also open to realize purpose of energy saving again by controlling closing of shock detection circuit of the present invention with the pin that enables of gate device U5 control power supply U3 in needs.Steering logic can be done change according to the different product demand.
By the way, shock detection circuit of the present invention can in time send alarm signal after detecting mobile or shaking.Shock detection circuit of the present invention can come adjustment trigger conditions according to the characteristic of different application occasion, and can be used for different application occasion and product as subsystem.
In the above-described embodiments, only the present invention has been carried out exemplary description, but those skilled in the art can carry out various modifications to the present invention after reading present patent application under the situation that does not break away from the spirit and scope of the present invention.
Claims (8)
1. a shock detection circuit is characterized in that, described shock detection circuit comprises:
Power supply;
Shock sensor, described shock sensor conducting when measured target is static, described shock sensor disconnected when described measured target moved;
Low-pass filter is used for the flase drop survey of the described shock sensor of filtering and the trickle vibrations of described measured target, and the first input end of described low-pass filter connects described power supply, and its second input end links to each other with an end of described shock sensor;
Impact damper, the input end of described impact damper is connected in the output terminal of described low-pass filter;
Controller, the input end of described controller is connected in the output terminal of described impact damper, and described controller is connected with external system by connector;
With gate device, describedly link to each other with described connector with described controller respectively with two input ends of gate device, the described pin that enables that is connected described power supply with the output terminal of gate device,
Wherein, when the output signal of described low-pass filter reaches trigger gate in limited time, described impact damper triggers described controller and produces the alarm output signal.
2. shock detection circuit according to claim 1 is characterized in that, described shock sensor is ball switch or snap switch.
3. shock detection circuit according to claim 1 is characterized in that, described controller is single-chip microcomputer.
4. shock detection circuit according to claim 1, it is characterized in that, described low-pass filter comprises resistance R 1 and capacitor C 1, described resistance R 1 and described capacitor C 1 are arranged in parallel between the output terminal of the described first input end of described low-pass filter and described low-pass filter, and current-limiting resistance R2 series connection is arranged between the output terminal of described second input end of described low-pass filter and described low-pass filter.
5. shock detection circuit according to claim 4 is characterized in that, the resistance of described resistance R 1, R2 and the capacitance of described capacitor C 1 are adjustable.
6. shock detection circuit according to claim 1 is characterized in that, the described output signal of described low-pass filter reaches described trigger gate in limited time, and described impact damper is exported a logic level signal and triggered described controller and produce described alarm output signal.
7. shock detection circuit according to claim 1 is characterized in that, described impact damper is the phase inverter of band schmidt trigger.
8. shock detection circuit according to claim 1, it is characterized in that, potential difference (PD) when the other end ground connection of described shock sensor, described shock sensor conducting between its described two ends is zero, between its described two ends potential difference (PD) is arranged when described shock sensor disconnects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010570753 CN102042867B (en) | 2010-12-02 | 2010-12-02 | Shock detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010570753 CN102042867B (en) | 2010-12-02 | 2010-12-02 | Shock detection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN102042867A CN102042867A (en) | 2011-05-04 |
| CN102042867B true CN102042867B (en) | 2013-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010570753 Expired - Fee Related CN102042867B (en) | 2010-12-02 | 2010-12-02 | Shock detection circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103412258B (en) * | 2013-08-23 | 2015-06-17 | 国家电网公司 | Breaker switch-on-off gate spring ultrasound monitoring device and method |
| CN103604493B (en) * | 2013-11-27 | 2015-09-16 | 东南大学 | A kind of voice signal detection and alarm system |
| CN103760601B (en) * | 2014-01-16 | 2016-10-19 | 中国矿业大学 | A kind of impulsion pressure microseismic signals processes circuit |
| KR102095202B1 (en) * | 2019-09-26 | 2020-03-31 | 주식회사 나노켐 | Separation inspecting system for flue |
| CN114488592A (en) * | 2020-11-11 | 2022-05-13 | 昆山科技大学 | Liquid crystal glass plate modulation circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2521589Y (en) * | 2001-12-30 | 2002-11-20 | 黄采伦 | Mechanical rotary part on-line faults diagnosing device |
| CN101025856A (en) * | 2007-02-08 | 2007-08-29 | 浙江大学 | Data acquisition device and method for low frequency vibration detection |
| CN201935731U (en) * | 2010-12-02 | 2011-08-17 | 惠州Tcl移动通信有限公司 | Vibration detecting circuit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0573518A1 (en) * | 1991-02-28 | 1993-12-15 | Sabed Limited | A detector |
| EP1882253A1 (en) * | 2005-04-22 | 2008-01-30 | Koninklijke Philips Electronics N.V. | Method of mechanical shock detection and method and apparatus for recording data onto an optical disc |
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- 2010-12-02 CN CN 201010570753 patent/CN102042867B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2521589Y (en) * | 2001-12-30 | 2002-11-20 | 黄采伦 | Mechanical rotary part on-line faults diagnosing device |
| CN101025856A (en) * | 2007-02-08 | 2007-08-29 | 浙江大学 | Data acquisition device and method for low frequency vibration detection |
| CN201935731U (en) * | 2010-12-02 | 2011-08-17 | 惠州Tcl移动通信有限公司 | Vibration detecting circuit |
Non-Patent Citations (1)
| Title |
|---|
| JP特表2008-537278A 2008.09.11 |
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| CN102042867A (en) | 2011-05-04 |
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Granted publication date: 20130904 |