CN205506202U - Infrasonic wave detector - Google Patents
Infrasonic wave detector Download PDFInfo
- Publication number
- CN205506202U CN205506202U CN201620131406.8U CN201620131406U CN205506202U CN 205506202 U CN205506202 U CN 205506202U CN 201620131406 U CN201620131406 U CN 201620131406U CN 205506202 U CN205506202 U CN 205506202U
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- signal
- flat diaphragm
- circuit
- infrasonic wave
- hoop
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Abstract
The utility model relates to an infrasonic wave detector, which comprises a signal amplifying circuit, a low-pass filter circuit, a signal attenuation circuit, a program control gain amplifying circuit, a direct current bias circuit and a controller; the infrasonic wave sensor comprises a shell, a receiving flat diaphragm, a collecting flat diaphragm, a receiving flat diaphragm hoop, a collecting flat diaphragm hoop, a base and a PVDF piezoelectric film. The utility model discloses an infrasonic wave sensor real-time detection infrasonic wave signal through the demonstration of display screen realization information, reports to the police through alarm device when detecting unusually, the utility model discloses convenient operation has very strong practicality, the utility model provides an infrasonic wave sensor adopts the infrasonic wave to receive flat diaphragm and the flat diaphragm of infrasonic wave collection, has realized that the infrasonic wave receives the effective isolation of flat diaphragm and signal collection flat diaphragm, is favorable to receiving signal's even stable transmission.
Description
Technical field
This utility model equipment Inspection instrument field, particularly relates to a kind of infrasonic wave detector.
Background technology
On engineer applied, when infrared range-measurement system is measured, when measuring certain distance put between measuring instrument, if
Centre has barrier, infrared meeting to run into barrier will to return, and measures the distance obtained and can become measuring instrument and arrive
The distance of barrier, causes measuring；During ultrasonic ranging, ultrasound wave runs into object and will reflect, institute
During to have barrier before object being measured, can make to detect data cannot be correctly obtained.
Rotating machinery or pipeline are in operation and all can send each noise like due to friction, both comprise in this noise
Ultra-low frequency infrasonic wave, also comprises audible frequency range sound wave and the ultrasound wave of hyperfrequency, due to the biography of acoustic signals
Defeated distance quickly reduces along with the increase of frequency, such as: frequency is the acoustic signals transmission range of 1000Hz
Energy attenuation 90% after reaching 7Km, the infrasonic wave of 1Hz is then intended to exceed in transmission range
After 3000Km, energy just can decay 90%.Therefore can be realized equipment operation exception by infrasonic wave frequency range
The remote contactless fault diagnosis of state.
Current internal and international on the online sound wave of equipment operation exception state diagnosed be concentrated mainly on ultrasound wave
Flaw detection and acoustic emission diagnostic field.
At present, rarely has infrasonic sensor record based on PVDF thin film.In recent decades, to infrasonic wave
Detection achieved with certain achievement, have developed the infrasonic sensor of some function admirables, be substantially
Condenser type infrasonic sensor.But capacitance type sensor there is also some problems.Such as at high temperature, high humidity
And testing result can be impacted under conditions of height excitation.Therefore, propose to use new structure, novel herein
Sensing element improves the measurement sensitivity of infrasonic sensor, reduces noise jamming, can effectively prevent height
The impact of the environment such as temperature, high humidity and high excitation.
Utility model content
This utility model is that to solve the measurement sensitivity of current infrasonic sensor the highest, stable the strongest, detection
Technical problem that data cannot be correctly obtained and a kind of infrasonic wave detector is provided.
This utility model is adopted the technical scheme that by solving technical problem present in known technology:
A kind of infrasonic wave detector, this infrasonic wave detector include signal amplification circuit, low-pass filter circuit,
Signal attenuation circuit, programme-controlled gain amplifying circuit, DC bias circuit, controller；Described signal amplifies electricity
Signal is amplified and inputs a signal into low-pass filter circuit by road, and signal is entered by described low-pass filter circuit
Filtered signal is also inputted to signal attenuation circuit by row low-pass filtering, and described signal attenuation circuit is by signal
Carry out decaying and inputting the signal after decay to programme-controlled gain amplifying circuit, described programme-controlled gain amplifying circuit
Signal after signal carrying out gain amplification and amplifying is separately input into controller and DC bias circuit；
This infrasonic wave detector is additionally provided with infrasonic sensor；Described infrasonic sensor will detect in real time
Infrasonic wave signal inputs to signal amplification circuit；
Described infrasonic sensor include shell, receive flat diaphragm, gather flat diaphragm, receive flat diaphragm hoop,
Gathering flat diaphragm hoop, pedestal, PVDF piezoelectric membrane, shell is fixed on pedestal, receives flat diaphragm and adopts
Collection flat diaphragm is fixed on the two sections end of shell by receiving flat diaphragm hoop and collection flat diaphragm hoop, PVDF
Piezoelectric membrane array is arranged on the side of the close pedestal gathering flat diaphragm；Described infrasonic wave detector also includes
A/D change-over circuit, display screen and alarm device；Signal is biased and by letter by described DC bias circuit
Number input is to A/D change-over circuit, and signal is carried out A/D conversion signal is defeated by described A/D change-over circuit
Entering to controller, signal is carried out arranging and signal being fed back to display screen by described controller；Display screen and report
Alarm device electrically connects, and described display screen is intelligent touch display screen.
Further, described shell is cylindrical, and its two sections end margin is threaded；Reception flat diaphragm hoop,
Gather flat diaphragm hoop and pedestal is concentric circles, along being threaded in receiving flat diaphragm hoop and gathering flat diaphragm hoop,
Threadingly match with shell two sections end margin screw thread in receiving flat diaphragm hoop and gathering flat diaphragm hoop.
Further, insulation lubricating oil is filled in the described cavity received between flat diaphragm and collection flat diaphragm；Base
Fixing hole and holding wire fairlead it is provided with on Zuo.
Further, described programme-controlled gain amplifying circuit includes gain-programmed amplifier and the first amplifier, described journey
The IN+ end foot of control gain amplifier is connected with the outfan of signal attenuation circuit by the first resistance, described journey
The OUT terminal foot of control gain amplifier is connected with DC bias circuit and controller, and described programme-controlled gain amplifies
The REF end foot of device and the outfan of the first amplifier connect, and the in-phase end of described first amplifier is by the 6th electricity
Resistance ground connection by the 7th resistance that is sequentially connected in series and the 8th resistance access power supply, described first amplifier anti-phase
End is connected with the outfan of self.
This utility model has the advantage that with good effect: this utility model is real-time by infrasonic sensor
Detection infrasonic wave signal；Meanwhile, by signal amplification circuit, low-pass filter circuit, signal attenuation circuit,
Programme-controlled gain amplifying circuit, DC bias circuit and A/D change-over circuit realize the conditioning of signal；Further, logical
Cross display screen and realize the display of information, reported to the police by alarm device when detection is abnormal, this Novel operating side
Just, there is the strongest practicality.
The infrasonic sensor that this utility model provides, uses infrasonic wave to receive flat diaphragm and infrasonic wave collection is put down
Diaphragm, it is achieved that infrasonic wave reception flat diaphragm is effectively isolated with signals collecting flat diaphragm, is conducive to receiving letter
Number uniform and stable transmission.Additionally, insulation lubricating oil fill in the damped coefficient that can increase sensing, with
Strengthen the ability of the anti-noise jamming of sensor；This utility model infrasonic sensor, uses PVDF Novel pressure
Conductive film, utilizes the feature that its low frequency performance is good, has widened the low of PVDF piezoelectric membrane infrasonic sensor
Frequently scope, strengthens detection signal and reduces the error of detection signal；The infrasonic wave sensing that this utility model provides
Device, uses PVDF novel piezoelectric thin-film, utilizes it to be susceptible to the feature of the factor such as high temperature, high humidity impact,
Improve the measurement sensitivity of infrasonic sensor, low frequency and intrasonic are responded effective, reduces clutter
Interference, it is achieved that the infrasonic sensor normal use under high temperature, super-humid conditions.
Accompanying drawing explanation
Fig. 1 is the infrasonic wave detector arrangement schematic diagram that this utility model embodiment provides；
Fig. 2 is the plan structure schematic diagram of the infrasonic sensor that this utility model provides；
Fig. 3 is that the infrasonic wave of the infrasonic sensor that this utility model provides gathers flat diaphragm and PVDF pressure
The structural representation of conductive film array；
Fig. 4 is the controller connection figure that this utility model provides；
In figure: 1, infrasonic sensor；1-1, shell；1-2, reception flat diaphragm；1-3, collection flat diaphragm；
1-4, reception flat diaphragm hoop；1-5, collection flat diaphragm hoop；1-6, pedestal；1-7, PVDF piezoelectric membrane；
1-8, fixing hole；1-9, holding wire fairlead；1-10, insulation lubricating oil；2, signal amplification circuit；3、
Low-pass filter circuit；4, signal attenuation circuit；5, programme-controlled gain amplifying circuit；6, DC bias circuit；
7, A/D change-over circuit；8, display screen；9, controller；10, alarm device.
Fig. 5 is the electrical block diagram of the programme-controlled gain amplifying circuit that this utility model embodiment provides
Detailed description of the invention
For summary of the invention of the present utility model, feature and effect can be further appreciated that, hereby enumerate following example,
And it is as follows to coordinate accompanying drawing to describe in detail.
As shown in Figures 1 to 4, the infrasonic wave detector that the present embodiment provides, this infrasonic wave detector includes
Signal amplification circuit 2, low-pass filter circuit 3, signal attenuation circuit 4, programme-controlled gain amplifying circuit 5,
DC bias circuit 6, controller 9；Signal amplification circuit 2 signal is amplified and inputs a signal into
Low-pass filter circuit 3, signal is carried out low-pass filtering and is inputted by filtered signal by low-pass filter circuit 3
To signal attenuation circuit 4, signal is carried out decaying and being inputted extremely by the signal after decay by signal attenuation circuit 4
Programme-controlled gain amplifying circuit 5, after signal is carried out gain amplification and will amplify by programme-controlled gain amplifying circuit 5
Signal is separately input into controller 9 and DC bias circuit 6；
This infrasonic wave detector is additionally provided with infrasonic sensor 1；Described infrasonic sensor 1 will detect in real time
Infrasonic wave signal input to signal amplification circuit 2；
Infrasonic sensor 1 detects infrasonic wave signal in real time and the signal input detected is amplified to signal
Circuit 2, infrasonic sensor include cylinder blanket 1-1, receive flat diaphragm 1-2, gather flat diaphragm 1-3,
Receive flat diaphragm hoop 1-4, gather flat diaphragm hoop 1-5, pedestal 1-6, PVDF piezoelectric membrane 1-7, shell
1-1 is fixed on pedestal 1-6, receives flat diaphragm 1-2 and gathers flat diaphragm 1-3 by receiving flat diaphragm hoop 1-4
It is fixed on the two sections end of shell 1-1 with gathering flat diaphragm hoop 1-5, for producing shape under infrasonic wave effect
Becoming, 8 PVDF piezoelectric membrane 1-7 arrays are arranged on the one of the close pedestal 1-6 gathering flat diaphragm 1-3
Side, and be used for strengthening piezoelectric signal and reducing signal output error；Its housing 1-1 is cylindrical, and they are two years old
Cross section end outer surface is provided with screw thread；Receive flat diaphragm hoop 1-4, gather flat diaphragm hoop 1-5 and pedestal 1-6
For concentric circles, concentrically ringed internal diameter is consistent with the internal diameter of cylinder blanket 1-1；Receive flat diaphragm hoop 1-4
It is threaded with edge in collection flat diaphragm hoop 1-5, receives flat diaphragm hoop 1-4 and gather edge in flat diaphragm hoop 1-5
Screw thread matches with shell 1-1 two sections end margin screw thread, by infrasonic wave is received flat diaphragm hoop 1-4 and
Gather flat diaphragm hoop 1-5 and screw in the two sections end of cylinder blanket 1-1 respectively, to reach fixing and to seal whole
The purpose of sensor internal structure；Fill absolutely in receiving the cavity between flat diaphragm 1-2 and collection flat diaphragm 1-3
Edge lubricating oil 1-10, is advantageously implemented and receives flat diaphragm 1-2 and gather being effectively isolated of flat diaphragm 1-3 isolation,
Make signal transmission more steadily and increase the damping and amortization of system；And positive confinement to be kept, must not there is air；Base
It is provided with 4 fixing hole 1-8 for fixing infrasonic sensor on seat 1-6, pedestal is provided with signal and draws
Line portals 1-9, is pasted on infrasonic wave gathers the PVDF piezoelectric membrane 7 gusts on flat diaphragm 1-3 for drawing
The output signal line of row.
Described infrasonic wave detector also includes A/D change-over circuit 7, display screen 8 and alarm device 10；Described
Signal is biased and inputs a signal into A/D change-over circuit 7 by DC bias circuit 6, and described A/D turns
Changing circuit 7 signal carries out A/D conversion and inputs a signal into controller 9, described controller 9 is by signal
Carry out arranging and signal feeding back to display screen 8；Display screen and alarm device 10 electrically connect, described display screen
10 is intelligent touch display screen.
The present embodiment detects infrasonic wave signal in real time by infrasonic sensor 1；Meanwhile, amplified by signal
Circuit 2, low-pass filter circuit 3, signal attenuation circuit 4, programme-controlled gain amplifying circuit 5, direct current biasing
Circuit 6 and A/D change-over circuit 7 realizes the conditioning of signal；Further, the infrasonic wave signal detected passes through
Display screen 8 carries out signal and shows, thus facilitates user to learn the power of periphery infrasonic wave signal.
The programme-controlled gain amplifying circuit 5 of the present embodiment can use circuit structure as shown in Figure 5, including program control
Gain amplifier U1 and the first amplifier A1, the IN+ end foot of gain-programmed amplifier U1 is by the first electricity
Resistance R1 is connected with the outfan of signal attenuation circuit 4, the OUT terminal foot of gain-programmed amplifier U1
It is connected with DC bias circuit 6 and controller 9, the REF end foot of gain-programmed amplifier U1 and
The outfan of one amplifier A1 connects, and the in-phase end of the first amplifier A1 is by the 6th resistance R6 ground connection and leads to
Cross the 7th resistance R7 being sequentially connected in series and the 8th resistance R8 and access power supply, the end of oppisite phase of the first amplifier A1
It is connected with the outfan of self.For optimizing system, the display screen 8 of the present embodiment is intelligent touch display screen,
User can directly carry out the regulation that touch-control is operated, and is reported to the police by alarm device 10 when detection is abnormal.
The operation principle of the infrasonic sensor that this utility model provides is as follows: under extraneous infrasonic wave effect,
Infrasonic wave receives on flat diaphragm 1-2 and deforms upon, silicone oil 1-10 by deformation stable delivery to infrasonic wave collection
Flat diaphragm 1-3, infrasonic wave gathers the shape that infrasonic wave is caused by the PVDF piezoelectric membrane array on flat diaphragm 1-3
Becoming and change into charge signal, the quantity of electric charge of its output is directly proportional to suffered dependent variable, the quantity of electric charge obtained
Drawn from holding wire fairlead 1-9 by holding wire, after being processed by extraneous electric charge amplification etc., the external world can be obtained
Infrasonic information.
The above is only to preferred embodiment of the present utility model, not makees this utility model any
Pro forma restriction, every according to technical spirit of the present utility model to made for any of the above embodiments any simply
Amendment, equivalent variations and modification, belong in the range of technical solutions of the utility model.
Claims (1)
1. an infrasonic wave detector, this infrasonic wave detector includes signal amplification circuit, low-pass filter circuit, signal attenuation circuit, programme-controlled gain amplifying circuit, DC bias circuit, controller；Signal is amplified and inputs a signal into low-pass filter circuit by described signal amplification circuit, signal is carried out low-pass filtering and inputs filtered signal to signal attenuation circuit by described low-pass filter circuit, signal is carried out decaying and inputting the signal after decay to programme-controlled gain amplifying circuit by described signal attenuation circuit, and the signal after signal is carried out gain amplification and will amplify by described programme-controlled gain amplifying circuit is separately input into controller and DC bias circuit；It is characterized in that, this infrasonic wave detector is additionally provided with infrasonic sensor；The infrasonic wave signal detected in real time is inputted to signal amplification circuit by described infrasonic sensor；
Described infrasonic sensor includes shell, receives flat diaphragm, collection flat diaphragm, reception flat diaphragm hoop, collection flat diaphragm hoop, pedestal, PVDF piezoelectric membrane, shell is fixed on pedestal, receiving flat diaphragm and collection flat diaphragm to be fixed on the two sections end of shell with gathering flat diaphragm hoop by receiving flat diaphragm hoop, PVDF piezoelectric membrane array is arranged on the side of the close pedestal gathering flat diaphragm；Described infrasonic wave detector also includes A/D change-over circuit, display screen and alarm device；Signal is biased and inputs a signal into A/D change-over circuit by described DC bias circuit, and signal is carried out A/D conversion and inputs a signal into controller by described A/D change-over circuit, and signal is carried out arranging and signal being fed back to display screen by described controller；Display screen and alarm device electrical connection, described display screen is intelligent touch display screen；
Described shell is cylindrical, and its two sections end margin is threaded；Receiving flat diaphragm hoop, collection flat diaphragm hoop and pedestal is concentric circles, and in receiving flat diaphragm hoop and gathering flat diaphragm hoop, edge is threaded, and threadingly matches with shell two sections end margin screw thread in receiving flat diaphragm hoop and gathering flat diaphragm hoop；
Insulation lubricating oil is filled in the described cavity received between flat diaphragm and collection flat diaphragm；Fixing hole and holding wire fairlead it is provided with on pedestal；
Described programme-controlled gain amplifying circuit includes gain-programmed amplifier and the first amplifier, the IN+ end foot of described gain-programmed amplifier is connected with the outfan of signal attenuation circuit by the first resistance, the OUT terminal foot of described gain-programmed amplifier is connected with DC bias circuit and controller, the REF end foot of described gain-programmed amplifier and the outfan of the first amplifier connect, the in-phase end of described first amplifier accesses power supply by the 6th resistance eutral grounding and by the 7th resistance being sequentially connected in series and the 8th resistance, and the end of oppisite phase of described first amplifier is connected with the outfan of self.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620131406.8U CN205506202U (en) | 2016-02-19 | 2016-02-19 | Infrasonic wave detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620131406.8U CN205506202U (en) | 2016-02-19 | 2016-02-19 | Infrasonic wave detector |
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| Publication Number | Publication Date |
|---|---|
| CN205506202U true CN205506202U (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620131406.8U Expired - Fee Related CN205506202U (en) | 2016-02-19 | 2016-02-19 | Infrasonic wave detector |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106323455A (en) * | 2016-08-18 | 2017-01-11 | 中国地震局地壳应力研究所 | Difference type infrasonic wave monitor based on MEMS microbarometer |
| CN110579269A (en) * | 2019-08-14 | 2019-12-17 | 中国地震局地壳应力研究所 | infrasonic wave sensor for rarefied atmosphere space and sound detection load cabin |
| US11399231B2 (en) * | 2019-09-27 | 2022-07-26 | United States Of America As Represented By The Administrator Of Nasa | Extreme low frequency microphone/hydrophone for exploration of oceanic and atmospheric dynamics |
-
2016
- 2016-02-19 CN CN201620131406.8U patent/CN205506202U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106323455A (en) * | 2016-08-18 | 2017-01-11 | 中国地震局地壳应力研究所 | Difference type infrasonic wave monitor based on MEMS microbarometer |
| CN106323455B (en) * | 2016-08-18 | 2018-12-04 | 中国地震局地壳应力研究所 | Differential type monitored by infrasonic wave instrument based on MEMS micromanometer |
| CN110579269A (en) * | 2019-08-14 | 2019-12-17 | 中国地震局地壳应力研究所 | infrasonic wave sensor for rarefied atmosphere space and sound detection load cabin |
| CN110579269B (en) * | 2019-08-14 | 2022-05-31 | 中国地震局地壳应力研究所 | Infrasonic wave sensor for rarefied atmosphere space and sound detection load cabin |
| US11399231B2 (en) * | 2019-09-27 | 2022-07-26 | United States Of America As Represented By The Administrator Of Nasa | Extreme low frequency microphone/hydrophone for exploration of oceanic and atmospheric dynamics |
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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: 20160824 Termination date: 20170219 |
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| CF01 | Termination of patent right due to non-payment of annual fee |