CN208652150U - A kind of infrasound sensor and electronic equipment - Google Patents
A kind of infrasound sensor and electronic equipment Download PDFInfo
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- CN208652150U CN208652150U CN201820857490.0U CN201820857490U CN208652150U CN 208652150 U CN208652150 U CN 208652150U CN 201820857490 U CN201820857490 U CN 201820857490U CN 208652150 U CN208652150 U CN 208652150U
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Abstract
The utility model provides a kind of infrasound sensor and electronic equipment, and wherein infrasound sensor includes: shell, sensing head and processing circuit, sensing head and processing circuit is pre-defined low-frequency cut-off frequency；Infrasound data collected are converted to the first electric signal, and pass to processing circuit for acquiring infrasound data by sensing head；Processing circuit is used for the first Electric signal processing at exporting after the second electric signal.In this way, when infrasound sensor is set to the environment such as long distance gas pipeline, gas leakage point if it exists, then gas leakage and pipe friction and generate sound, wherein the sound of low frequency part can be propagated relatively remote, infrasound sensor collects the infrasound data of propagation, can judge whether long defeated gas pipeline is normal according to the electric signal that infrasound sensor exports, and the accuracy and timeliness of the monitored by infrasonic wave of long defeated gas pipeline are dramatically improved there may be adopting an effective measure in time when gas leaks in the long defeated gas pipeline of judgement.
Description
Technical field
The utility model relates to automatic control technology field, in particular to a kind of infrasound sensor and electronic equipment.
Background technique
In long gas transmission body pipeline engineering, need to carry out leakage monitoring to the defeated gas pipeline of length.However, since gas can press
Contracting is stronger, therefore in the defeated gas pipe leakage of length, and the variable quantity of pressure and flow in pipe is smaller, can not be by pipeline
Fluid parameter etc. determine whether to leak.
Therefore, a kind of leakage monitoring scheme that can effectively monitor long defeated gas pipeline is needed.
Utility model content
The utility model embodiment provides a kind of infrasound sensor and electronic equipment, with solve existing gas pipe leakage without
The technical issues of method monitors.
In order to achieve the above object, concrete scheme provided by the embodiment of the utility model is as follows:
In a first aspect, the utility model embodiment provides a kind of infrasound sensor, comprising: shell, sensing head and processing
Circuit, wherein the sensing head and the processing circuit are pre-defined low-frequency cut-off frequency；
The sensing head is set on the shell, and the conditioning circuit is set in the shell, the sensing head
Signal output end is electrically connected with the signal input part of the conditioning circuit；
The sensing head is used to acquire infrasound data, and infrasound data collected are converted to the first electric signal, and
First electric signal is passed into processing circuit；
The processing circuit is used for first Electric signal processing at exporting after the second electric signal.
Optionally, the sensing head is charge output type component；
The processing circuit includes front end circuit and back-end circuit, the signal input part of the front end circuit and the sensing
The signal output end electrical connection of head, the signal output end of the front end circuit and the signal input part of the back-end circuit are electrically connected
It connects；
Infrasound data collected are converted to the first charge signal by the sensing head；
The front end circuit is used to convert the first current signal for first charge signal；
The back-end circuit is used to first current signal being converted to first voltage signal.
Optionally, the front end circuit includes: power supply, charge amplification conversion circuit, signal conditioning circuit, current loop circuit
And common interface；
The power supply is sensing head power supply, and the sensing head exports the first charge letter when collecting infrasound data
Number, after first charge signal amplifies conversion circuit and signal conditioning circuit processing via the charge, it is transmitted to institute
Current loop circuit is stated, the received electric signal of institute is converted to first current signal, passes through the public affairs by the current loop circuit
First current signal is exported to the back-end circuit with interface.
Optionally, the value range of first current signal is 4 milliamperes to 20 milliamperes；
The value range of the first voltage signal is -10 volts to+10 volts.
Optionally, the shell is the waterproof case of cast aluminium material.
Optionally, the power supply includes positive electricity source circuit and negative electricity source circuit；
The positive electricity source circuit is for providing positive supply, and the negative electricity source circuit is for providing negative supply.
Optionally, the low-frequency cut-off frequency of the charge amplifying circuit is 0.161Hz.
Optionally, the sensor matching circuit includes low-pass filter circuit, the low-pass filter circuit by frequency
For 10050Hz.
It optionally, further include connector and connector, the connector is set on the shell；
The sensing head is connect with the threaded one end of the connector, the other end of the connector and the connector spiral shell
Line connection.
Second aspect, the utility model embodiment provide described in any one of a kind of electronic equipment, including first aspect
Infrasound sensor.
In the utility model embodiment, provided infrasound sensor includes sensing head, shell and is set to described outer
Processing circuit in shell, sensing head acquires the infrasound data in environment, and the infrasound data of acquisition are converted to the first electricity
Signal is to processing circuit, and by processing circuit by the first Electric signal processing at exporting after the second electric signal, the second electric signal is certain
Available signal in value range.In this way, gas is let out if it exists when infrasound sensor is set to the environment such as long distance gas pipeline
Leak source, then the gas of leakage point and pipe friction and generate sound, and wherein the sound of low frequency part can propagate it is relatively remote.
In this way, infrasound sensor collects the infrasound data of propagation, it can be defeated according to the electric signal judgement length that infrasound sensor exports
Whether gas pipeline is normal, and in the long defeated gas pipeline of judgement there may be adopting an effective measure in time when gas leaks, greatly
Improve to degree the accuracy and timeliness of the monitored by infrasonic wave of long defeated gas pipeline.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the utility model embodiment, the utility model embodiment will be retouched below
Attached drawing needed in stating is briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model
Some embodiments for those of ordinary skill in the art without any creative labor, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is a kind of structural schematic diagram of infrasound sensor provided by the embodiment of the utility model；
Fig. 2 a to Fig. 2 e is the partial structure diagram of infrasound sensor provided by the embodiment of the utility model；
Fig. 3 to Figure 17 is the structural schematic diagram of the processing circuit of infrasound sensor provided by the embodiment of the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
It clearly and completely describes, it is clear that the embodiments are a part of the embodiments of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without creative efforts
The every other embodiment obtained, fall within the protection scope of the utility model.
Referring to Fig. 1, Fig. 1 is the structural schematic diagram of infrasound sensor provided by the embodiment of the utility model.As shown in Figure 1,
A kind of infrasound sensor, comprising: shell 110, sensing head 120 and processing circuit 130, wherein the sensing head 120 and the place
Reason circuit 130 is pre-defined low-frequency cut-off frequency；
The sensing head 120 is set on the shell 110, and the conditioning circuit is set in the shell 110, described
The signal output end of sensing head 120 is electrically connected with the signal input part of the conditioning circuit；
The sensing head 120 is used to acquire infrasound data, and infrasound data collected are converted to the first electric signal,
And first electric signal is passed into processing circuit 130；
The processing circuit 130 is used for first Electric signal processing at exporting after the second electric signal.
Infrasound sensor 10 in the present embodiment can be used for growing the infrasound monitoring of the environment such as defeated gas pipeline.It is described
Infrasound sensor 10 includes shell 110, sensing head 120 and processing circuit 130, the sensing head 120 and the processing circuit 130
It is all set in the shell 110.
The shell 110 is the protection shell of infrasound sensor 10, and sensing head 120 and processing circuit 130 are enclosed in institute
In the accommodation space for stating shell 110, it is not easy to be damaged by liquid, the dust etc. in environment.Specifically, the shell 110 can be by
The production of cast aluminium material, has dirt exclusion capabilities.Since the infrasound sensor 10 is mostly used the gas leakage point prison of head of a household's gas transmission body pipeline
Control, therefore it is required that the degree of protection of the shell 110 reaches IP66 or more, explosive-proof grade reaches Exd IIB T4 or more.It is described
The concrete shape and structure of shell 110 can be specifically arranged according to demand, as long as processing circuit 130 and sensing head 120 can be wrapped up
Part-structure, be not limited thereto.
The sensing head 120 is the data acquisition components of the infrasound sensor 10, for acquiring the infrasound in environment
Data, and the infrasound data of acquisition are converted into the first electric signal, the first electric signal is passed into processing circuit 130 and is handled.
The sensing head 120 may include low-frequency sound wave sensing element and signal processing unit, and low-frequency sound wave sensing element is for acquiring
Infrasound data, and the infrasound data of acquisition are passed into signal processing unit, by signal processing unit by the infrasonic sound of acquisition
Wave number evidence is converted to electric signal, the first electric signal that the as described sensing head 120 exports.
The processing circuit 130 is used to handle the first initial electric signal of the output of sensing head 120, by institute received first
After Electric signal processing is at the second electric signal, second electric signal can be the voltage signal or telecommunications of variation in a certain range
Number, for reacting certain infrasound data, second electric signal directly can be received and be used by external equipment.Specifically
, the processing circuit 130 may include filter circuit, amplifying circuit, compensation circuit, correcting circuit etc., be not construed as limiting.
In a specific embodiment, shown in a to Fig. 2 e as shown in Figure 1, Figure 2, the infrasound sensor 10 can also include
Connector and connector 113, the connector 113 are set on the shell 110；
The sensing head 120 is connect with the threaded one end of the connector, the other end of the connector and the connection
Part 113 is threadedly coupled.
Sensing head 120 is connected on the connector 113 of shell 110 by connector.Specifically, connector 113 needs
Meet and bears the problem of oil leak or gas leakage will not occur in the case where 20MPa pressure.Sensing head 120 itself preferably uses
10-32 coaxial jack, the circuit board 131 of processing circuit 130 are SMA interfaces, in this way, sensing head 120 and circuit board 131 can lead to
Cross the cable realization electrical connection that a 10-32 turns SMA interface.
Wherein, sensing head 120 uses 10-32 coaxial jack, and the heart of coaxial jack can be single signal output end, passes
Feel the peripheral screw ground connection of head 120, and the impedance between the metal shell 110 and the earth of sensor can be 108 Europe.The company
Connecing device can choose the sensor of model 062A06, and sensing head 120 is fixed on connector 113 by the connector.When assembly,
Sensing head 120 is installed on the internal screw thread of connector, the external screw thread of connector is 1 inch of NPT interface of standard, for that will connect
Device itself is connect to be fixed on connector 113.The overall dimensions of sensing head 120 can be designed as: 1.50In.Hex.x 1.48In.H
(38.1mm Hex x 37.6mm H).Screw assembly mode, assembly manipulation is easy, easy to repair and replacement.
The performance of the sensing head 120 can be with are as follows: charge sensitivity (± 10%) 2200pC/psi；Frequency response 2Hz~
8000Hz；Dynamic testing range 0.28x 10-4 to 10psi；Maximum bears pressure (static state) 3Kpsi etc..In addition, infrasonic sound senses
System power supply used in device 10, supply voltage can be 12VDC to 36VDC, preferably 24VDC power supply, and design electricity
Source interface is binding post.Performance parameter and power attributes setting so that infrasound sensor 10 is more convenient for assembling, and meet infrasonic sound prison
Survey demand.
The circuit board 131 of the processing circuit 130 is formed, FR4 material can be used, designed using 4 laminates, and plate thickness
1.2 millimeters, plate thickness error is related to 1.2mm/ ± 10%.The internal layer copper thickness of circuit board 131 is designed as 35um/10Z, and outer layer copper is thick
It is designed as 35um/10Z.In addition, circuit board 131 can be 65 millimeters of diameter of circle.The via hole processing mode of circuit board 131 is
Port lid oil processing to be crossed, without impedance control processing, does heavy tin processing on the surface of circuit board 131, welding resistance forms double side blue,
Character is two-sided white.The size of the integrated circuit board 131 of present embodiment is smaller, optimizes the whole ruler of infrasound sensor 10
It is very little.
Specifically, sealing cover 111 and sealing ring 112 are also provided on the shell 110, for realizing shell 110
Sealing protection effect.It is provided with sensor plug 121 on sensing head 120, and by rubber stopper 123, gasket 124 and compresses spiral shell
Mother 125 etc. realizes fixation.In addition, being also provided with the consolidating to shell 110 for fixing circuit board 131 on circuit board 131
Determine bolt 132 and bayonet bolt 133.Circuit board 131 is connected on 120 interface circuit of sensing head by connecting terminal.
Infrasound sensor 10 provided in this embodiment, sensing head 120 and processor is set in shell 110, and shell
110 are wholely set by cast aluminium material with sensor body, increase water proof and dust proof ability.In addition, the infrasound of sensing head 120 incudes
Element needs to stretch out the shell 110, acquires the infrasound data in environment.The signal output end and processing electricity of sensing head 120
The signal input part on road 130 is electrically connected, and after infrasound data collected are converted to the first electric signal, passes to processing circuit
130 advanced optimize and are processed into the second electric signal, and the second electric signal of output is allowed directly to be received and made by external equipment
With for time acoustic monitoring or automatic control feedback etc..
Infrasound sensor 10 provided in this embodiment, sensing head 120 acquire the infrasound data in environment, and by acquisition
Infrasound data are converted to the first electric signal to processing circuit 130, by processing circuit 130 by the first Electric signal processing at the second electricity
It is exported after signal, the second electric signal is the available signal in certain value range.In this way, infrasound sensor 10 is set to long defeated day
When the environment such as right feed channel, gas leakage point if it exists, then the gas of leakage point and pipe friction and generate sound, infrasonic sound sensing
Device 10 collects the infrasound data of propagation, and the long defeated gas pipeline of electric signal judgement that can be exported according to infrasound sensor 10 is
It is no normal, and long gas transmission body is realized there may be adopting an effective measure in time when gas leaks in the long defeated gas pipeline of judgement
The infrasound of pipeline is accurate, timely monitors.
On the basis of the above embodiments, the sensing head 120 is charge output type component；
As shown in figure 3, the processing circuit 130 includes front end circuit and back-end circuit, the signal of the front end circuit is defeated
Enter end to be electrically connected with the signal output end of the sensing head 120, the signal output end of the front end circuit and the back-end circuit
Signal input part electrical connection；
Infrasound data collected are converted to the first charge signal by the sensing head 120；
The front end circuit is used to convert the first current signal for first charge signal；
The back-end circuit is used to first current signal being converted to first voltage signal.
In the present embodiment, the processing circuit 130 divides for front end circuit and back-end circuit, front end circuit and sensing head 120
Electrical connection, the initial electrical signal that processing sensing head 120 exports, treated that electric signal further turns to front end circuit for back-end circuit
Change processing.Sensing head 120 provided in this embodiment can be voltage output type component, then the infrasound collected of sensing head 120
Data are converted to the first charge signal, the first voltage signal conversion processes then exported sensing head 120 by front end circuit at
Then first current signal has back-end circuit that first current signal is converted to first voltage signal again, can be obtained one
Determine the voltage signal in range, directly receives and use for external equipment.
In the above process, the treatment process of front end circuit specifically includes that filtering, amplification, compensation etc., and sensing head 120 is defeated
Charge signal out is improved, output current signal.The treatment process of the back-end circuit specifically includes that filtering, amplification, benefit
It repays, correct, the voltage signal after front end circuit is improved is converted to current signal.
Specifically, the value range of first current signal can be 4 milliamperes to 20 milliamperes, the first voltage signal
Value range be -10 volts to+10 volts.
In a specific embodiment, as shown in figure 4, the front end circuit may include: power supply, charge amplification conversion
Circuit, signal conditioning circuit, current loop circuit and common interface；
The power supply is the sensing head 120 power supply, and the sensing head 120 exports first when collecting infrasound data
Charge signal passes after first charge signal amplifies conversion circuit and signal conditioning circuit processing via the charge
The current loop circuit is transported to, the received electric signal of institute is converted to first current signal, passed through by the current loop circuit
The common interface exports first current signal to the back-end circuit.
In addition, the power supply can be also used for as front end circuit, and the electrical component power supply to entire infrasound sensor 10.
By specific embodiment and it will can be able to achieve circuit below, and explain in detail each circuit mould in front end circuit
Block.
In a specific embodiment, the power supply may include positive electricity source circuit and negative electricity source circuit；
The positive electricity source circuit is for providing positive supply, and the negative electricity source circuit is for providing negative supply.
It as shown in Figure 5 and Figure 6, is a kind of schematic diagram of specific implementation circuit of power supply.Wherein, Fig. 5 is positive power circuit,
Used linear voltage regulator TPS7A4101 can tolerate extra-high voltage, is responsible for operational amplifier and provides positive supply.It is used
The MSOP-8 of resistance to thermal enhanced package, and can bear the continuous DC voltage or instantaneous input voltage of highest 50V.Meanwhile it
With a kind of internal Thermal shutdown and current-limiting function, protection can be provided to system in case of a fault.The positive electricity source circuit institute
The linear voltage regulator used can not only provide the Voltage rails Jing Guo well-tuned, and can also bear superelevation and quickly
Voltage transient, and pressure stabilization function is kept under this transient condition, and then be converted into the higher electric surge of simpler and cost performance
Circuit is protected, can be adapted for the application of more bad environments.Improve the stability and environment of power work performance
Adaptability.
In addition, resistance R199, R203 and R215 in positive electricity source circuit are test resistance, resistance R202 and linear
The enabled foot of voltage-stablizer connects, and the enabled foot of linear voltage regulator can be pulled up by resistance R202, and can play current limliting simultaneously
Effect, be further ensured that power supply power supply function stability,
Fig. 6 power circuit that is negative using reverse phase charge pump TPS60400 provides negative supply for operational amplifier.This circuit
In, resistance R187 is test circuit, and capacitor C143 is for storing energy.The efficiency of the reverse phase charge pump may be up to 95%, and logical
A negative pressure conversion circuit can be built by crossing 3 capacitors, can effectively save space on circuit board 131 and conversion speed is fast.
As shown in fig. 7, realizing circuit for the another of power circuit.The model MAX865 of the charge pump used, can
To export positive counter voltage simultaneously, the absolute value of output voltage is twice of input voltage, and efficiency may be up to 90%.It may be used as
The backup power source of operational amplifier.
As shown in figure 8, being a kind of specific implementation circuit of common interface, which is that electric current loop and power supply are total
Use interface.Due to sensor generally two-wire system pressure transmitter, external power supply power inlet shares one with signal output and connects
Mouth terminal J2.Wherein, J2 is the binding post that a Pin spacing is 5.08, and power supply is inputted from the pin1 of J2, and front end circuit is defeated
The first current signal out is exported from the pin2 of J2.Resistance R197 can be used as test resistance, test the normal power supply shape of power supply
State.Resistance R197 can also paste magnetic pole, to inhibit noise and interference.Capacitor C55 and capacitor C56 in circuit is for executing electricity
Filtering and decoupling effect in road.
As shown in figure 9, being a kind of specific implementation of 120 interface circuit of sensing head.The interface of sensing head 120 is preferably
CONN CIR 5-P, interface type are mother's SMA mouth.
It as shown in Figure 10, is a kind of specific implementation of charge amplifying circuit.Wherein, two TP points of TP15 and TP16 are used
Capacitor is floated in welding 10000pF High Precision Low Temperature；Charge signal exports after operational amplifier U12 amplification；TP5 and TP4 two
TP point is feedback resistance for welding 100M High Precision Low Temperature drift resistance.Its low-frequency cut-off frequency can be with are as follows: f=0.161Hz
It as shown in Figure 11 to Figure 13, is a kind of specific implementation of signal conditioning circuit.Signal conditioning circuit is practical to be
Has the circuit of low-pass filtering function, the cutoff frequency of the low-pass filter is 10050Hz.In this circuit, resistance R55, electricity
Resistance R58 is the test circuit in circuit, tests the working condition of circuit.Capacitor C42 and capacitor C22 executes filtering and decoupling is made
With.Capacitor C50, capacitor C53, resistance R53 and operational amplifier U12 connect to form step low-pass active filter.
Further, the signal conditioning circuit can also include voltage follower OPA244NA, the voltage follower
It is set to the output end of the low-pass filter, for improving the input impedance of circuit, output impedance is reduced, to improve circuit
Load capacity.
Furthermore the resistance R56, resistance R59 and capacitor C54 in circuit are reserved device.Resistance R198 is connected to electric current
Loop circuit, current loop circuit are used to provide reference voltage to operational amplifier U13, and signal is input to electric current after enhanced processing
Loop circuit.
It as shown in figure 14, is a kind of specific implementation of current loop circuit.Wherein, electric current loop master chip is
XTR101AU.Capacitor C63 is decoupling capacitor, is reserved device.Signal enters electric current loop by resistance R69, is then converted into 4mA
~20mA current signal, i.e., the described first current signal output.
On the basis of the above embodiments, as shown in Figure 15 to Figure 17, the circuit board 131 where processing circuit 130 may be used also
To include fixation hole MTG7 and MTG8, circuit board 131 can be fixed on shell 110 by fixation hole.On circuit board 131 also
It is provided with shielding case pad MTG17, MTG18, MTG19, MTG20, with reserved shielding case welding position.In addition, circuit board 131
On be additionally provided with optical locating point FD7 and FD8, for SMT patch position.TP8 and TP9 is rectangle clearance hole.
On the basis of the above embodiment, the circuit board 131 of the processing circuit 130 of sensor is pasted using SMT production line
Piece welding can also use board-washing water or absolute alcohol that the removing surface of circuit board 131 is clean after the completion of welding, and
The surface of circuit board 131 is dried up using heat gun.In this way, the processing and fabricating of circuit board 131 can be completed.
The infrasound sensor 10 that the numerous embodiments of the present embodiment provide, can be in the environment such as long distance gas pipeline
Carry the responsibility for stablizing, accurate signal conversion, improving and send.The simple production process of infrasound sensor 10, and be convenient for
Process and assemble, the sensing head 120 of infrasound sensor 10 and the cooperation of processing circuit 130 can effectively improve the standard of monitored by infrasonic wave
True property and timeliness.
The utility model embodiment further relates to a kind of electronic equipment, and the electronic equipment includes that above-mentioned Fig. 1 appoints into Figure 17
Infrasound sensor described in one embodiment.
The electronic equipment can include but is not limited to gas monitor component, infrasound monitoring etc. and be provided with infrasound sensing
The equipment of device, is not construed as limiting.
Electronic equipment provided in this embodiment, by the way that sensing head, shell is arranged in infrasound sensor and is set to described
Processing circuit in shell, sensing head acquires the infrasound data in environment, and the infrasound data of acquisition are converted to first
Electric signal is to processing circuit, and by processing circuit by the first Electric signal processing at exporting after the second electric signal, the second electric signal is one
Determine the available signal in value range.In this way, when infrasound sensor is set to the environment such as long distance gas pipeline, gas if it exists
Leakage point, then gas leakage point position leakage with pipe friction and generate sound, infrasound sensor collect propagation time
Sonic data can judge whether long defeated gas pipeline is normal according to the electric signal that infrasound sensor exports, and determine that length is defeated
Gas pipeline dramatically improves the infrasonic sound of long defeated gas pipeline there may be adopting an effective measure in time when gas leaks
The accuracy and timeliness of wave monitoring.
The specific implementation process of electronic equipment provided by the embodiment of the utility model may refer to provided by the above embodiment
The specific implementation process of infrasound sensor, this is no longer going to repeat them.
Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to
In this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation
Or replacement, it should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should be wanted with right
Subject to the protection scope asked.
Claims (10)
1. a kind of infrasound sensor characterized by comprising shell, sensing head and processing circuit, wherein the sensing head and
The processing circuit is pre-defined low-frequency cut-off frequency；
The sensing head is set on the shell, and the processing circuit is set in the shell, the signal of the sensing head
Output end is electrically connected with the signal input part of the processing circuit；
The sensing head is converted to the first electric signal for acquiring infrasound data, by infrasound data collected, and by institute
It states the first electric signal and passes to processing circuit；
The processing circuit is used for first Electric signal processing at exporting after the second electric signal.
2. infrasound sensor according to claim 1, which is characterized in that the sensing head is charge output type component；
The processing circuit includes front end circuit and back-end circuit, the signal input part of the front end circuit and the sensing head
Signal output end electrical connection, the signal output end of the front end circuit are electrically connected with the signal input part of the back-end circuit；
Infrasound data collected are converted to the first charge signal by the sensing head；
The front end circuit is used to convert the first current signal for first charge signal；
The back-end circuit is used to first current signal being converted to first voltage signal.
3. infrasound sensor according to claim 2, which is characterized in that the front end circuit includes: power supply, charge amplification
Conversion circuit, signal conditioning circuit, current loop circuit and common interface；
The power supply is sensing head power supply, and the sensing head exports the first charge signal when collecting infrasound data,
After first charge signal amplifies conversion circuit and signal conditioning circuit processing via the charge, it is transmitted to the electricity
Loop circuit is flowed, the received electric signal of institute is converted to first current signal by the current loop circuit, public is connect by described
Mouth exports first current signal to the back-end circuit.
4. infrasound sensor according to claim 3, which is characterized in that the value range of first current signal is 4
Milliampere is to 20 milliamperes；
The value range of the first voltage signal is -10 volts to+10 volts.
5. infrasound sensor according to claim 4, which is characterized in that the shell is the waterproof case of cast aluminium material.
6. infrasound sensor according to claim 5, which is characterized in that the power supply includes positive electricity source circuit and negative supply
Circuit；
The positive electricity source circuit is for providing positive supply, and the negative electricity source circuit is for providing negative supply.
7. infrasound sensor according to claim 6, which is characterized in that the low-frequency cut-off frequency of the charge amplifying circuit
For 0.161Hz.
8. infrasound sensor according to claim 7, which is characterized in that the signal conditioning circuit includes low-pass filtering electricity
Road, the low-pass filter circuit by frequency be 10050Hz.
9. infrasound sensor according to claim 1, which is characterized in that further include connector, the connector is set to
On the shell；
The sensing head is threadedly coupled with the connector.
10. a kind of electronic equipment, which is characterized in that including infrasound sensor as claimed in any one of claims 1-9 wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820857490.0U CN208652150U (en) | 2018-06-05 | 2018-06-05 | A kind of infrasound sensor and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820857490.0U CN208652150U (en) | 2018-06-05 | 2018-06-05 | A kind of infrasound sensor and electronic equipment |
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| CN208652150U true CN208652150U (en) | 2019-03-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108758360A (en) * | 2018-06-05 | 2018-11-06 | 北京目黑科技有限公司 | A kind of infrasound sensor and electronic equipment |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108758360A (en) * | 2018-06-05 | 2018-11-06 | 北京目黑科技有限公司 | A kind of infrasound sensor and electronic equipment |
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