CN108760146A - A kind of dynamic pressure transducer and electronic equipment - Google Patents
A kind of dynamic pressure transducer and electronic equipment Download PDFInfo
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- CN108760146A CN108760146A CN201810566581.3A CN201810566581A CN108760146A CN 108760146 A CN108760146 A CN 108760146A CN 201810566581 A CN201810566581 A CN 201810566581A CN 108760146 A CN108760146 A CN 108760146A
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- circuit
- dynamic pressure
- signal
- sensing head
- pressure transducer
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/06—Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
Abstract
A kind of dynamic pressure transducer of present invention offer and electronic equipment, wherein dynamic pressure transducer include:Shell, sensing head and processing circuit;The sensing head is set on the shell, and the modulate circuit is set in the shell, and the signal output end of the sensing head is electrically connected with the signal input part of the modulate circuit;The dynamic pressure data acquired are converted to the first electric signal, and first electric signal is passed to processing circuit by the sensing head for acquiring dynamic pressure data;The processing circuit is used for first Electric signal processing at being exported after the second electric signal.In this way, dynamic pressure transducer can effectively monitor dynamic pressure variation, and capable telecommunications number output is converted to, so that user is judged whether long transfusion fluid pipeline is normal according to output electric signal, and there may be adopt an effective measure in time when leakage judging long transfusion fluid pipeline.Dramatically improve the accuracy and timeliness of the dynamic pressure monitoring of long transfusion fluid pipeline.
Description
Technical field
The present invention relates to automatic control technology field, more particularly to a kind of dynamic pressure transducer and electronic equipment.
Background technology
In long transfusion fluid pipeline engineering, needs to carry out leakage monitoring to long transfusion fluid pipeline, generally use suction wave side
Method carrys out monitoring leakage.Existing leakage monitoring technology is, when pipeline leaks, the pressure of leakage point can decline, referred to as negative
Pressure, there are pressure oscillations at leakage point, thus by the long transfusion fluid pipeline of pressure sensor monitoring with the presence or absence of pressure oscillation come
It monitors Changshu fluid pipeline and whether there is leakage point.However, the pressure pulsation sensors used in existing leakage point monitoring are needles
Static pressure is monitored, if being used in the monitoring works of dynamic pressure, there will be the poor skill of monitoring effect
Art problem.
As it can be seen that there are the poor technical problems of leakage point monitoring effect for existing dynamic liquid pipe monitoring scheme.
Invention content
A kind of dynamic pressure transducer of offer of the embodiment of the present invention and electronic equipment are supervised with solving existing dynamic liquid pipeline
There are the poor technical problems of leakage point monitoring effect for prosecutor case.
In order to achieve the above object, concrete scheme provided in an embodiment of the present invention is as follows:
In a first aspect, an embodiment of the present invention provides a kind of dynamic pressure transducers, including:Shell, sensing head and processing
Circuit;
The sensing head is set on the shell, and the processing circuit is set in the shell, the sensing head
Signal output end is electrically connected with the signal input part of the processing circuit;
The dynamic pressure data acquired are converted to the first telecommunications by the sensing head for acquiring dynamic pressure data
Number, and first electric signal is passed into processing circuit;
The processing circuit is used for first Electric signal processing at being exported after the second electric signal.
Optionally, the sensing head is voltage 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;
The dynamic pressure data acquired are converted to first voltage signal by the sensing head;
The front end circuit is used to convert the first voltage signal to the first current signal;
The back-end circuit is used to first current signal being converted to second voltage signal.
Optionally, the front end circuit includes:Power supply, constant current power-switching circuit, sensor matching circuit, signal condition electricity
Road, current loop circuit and common interface;
The power supply is converted into constant-current source via the constant current power-switching circuit, is transmitted to the sensing head power supply, described
Sensing head exports first voltage signal when collecting dynamic pressure data, and the first voltage signal is via the sensor
After circuit and signal conditioning circuit processing, it is transmitted to the current loop circuit, the current loop circuit will be received
Electric signal is converted to first current signal, is exported first current signal to the postposition by the common interface
Circuit.
Optionally, ranging from 4 milliamperes to 20 milliamperes of the On The Current Value of first current signal;
The voltage value range of the second voltage signal is -10 volts to+10 volts.
Optionally, the output current of the constant current power-switching circuit is 1mA.
Optionally, the power supply includes positive electricity source circuit and negative electricity source circuit, the positive electricity source circuit and the negative supply
Circuit is electrically connected with the constant current power-switching circuit;
The positive electricity source circuit is for providing positive supply, and the negative electricity source circuit is for providing negative supply.
Optionally, the sensor matching circuit includes low-pass filter circuit, the low-pass filter circuit by frequency
For 10050Hz.
Optionally, the signal conditioning circuit further includes voltage follower, and the voltage follower is set to the low pass
The output end of filter.
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 connects.
Second aspect, an embodiment of the present invention provides dynamic described in any one of a kind of electronic equipment, including first aspect
State pressure sensor.
In the embodiment of the present invention, the dynamic pressure transducer provided includes sensing head, shell, and is set to described outer
Processing circuit in shell, sensing head acquires the dynamic pressure data in environment, and the dynamic pressure data of acquisition are converted to the
One electric signal exports the first Electric signal processing at a certain range of at after the second electric signal to processing circuit, by processing circuit
Available signal.In this way, when dynamic pressure transducer is set to long transfusion fluid pipeline environment, long transfusion fluid pipeline can be effectively monitored
Dynamic pressure variation, and the dynamic pressure data of monitoring are converted into capable telecommunications number output so that user can be according to dynamic
The electric signal of state pressure sensor output judges whether long transfusion fluid pipeline normal, and the long transfusion fluid pipeline of judgement there may be
Adopt an effective measure in time when leakage, dramatically improve long transfusion fluid pipeline dynamic pressure monitoring accuracy and when
Effect property.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, needed in being described below to the embodiment of the present invention
Attached drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention,
For those of ordinary skill in the art, without having to pay creative labor, it can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of structural schematic diagram of dynamic pressure transducer provided in an embodiment of the present invention;
Fig. 2 a to Fig. 2 e are the part-structure schematic diagram of dynamic pressure transducer provided in an embodiment of the present invention;
Fig. 3 to Figure 16 is the structural schematic diagram of the processing circuit of dynamic pressure transducer provided in an embodiment of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on this hair
Embodiment in bright, the every other implementation that those of ordinary skill in the art are obtained without creative efforts
Example, shall fall within the protection scope of the present invention.
Referring to Fig. 1, Fig. 1 is the structural schematic diagram of dynamic pressure transducer provided in an embodiment of the present invention.As shown in Figure 1,
A kind of dynamic pressure transducer 10, including:Shell 110, sensing head 120 and processing circuit 130;
The sensing head 120 is set on the shell 110, and the processing circuit 130 is set in the shell 110,
The signal output end of the sensing head 120 is electrically connected with the signal input part of the processing circuit 130;
The sensing head 120 is converted to the first electricity for acquiring dynamic pressure data, by the dynamic pressure data acquired
Signal, and first electric signal is passed into processing circuit 130;
The processing circuit 130 is used for first Electric signal processing at being exported after the second electric signal.
Dynamic pressure transducer 10 in the present embodiment can be used for the dynamic pressure prison of the environment such as long transfusion fluid pipeline
It surveys.The dynamic pressure transducer 10 includes shell 110, sensing head 120 and processing circuit 130, sensing head 120 and the processing
Circuit 130 may be contained in the shell 110.
The shell 110 is the protection shell of dynamic pressure transducer 10, and sensing head 120 and processing circuit 130 are surrounded
In the accommodation space of the shell 110, it is not easy by damages such as liquid, dusts in environment.Specifically, the shell 110 can
To be made by cast aluminium material, has water proof and dust proof ability.Since the dynamic pressure transducer 10 is mostly used head of a household's transfusion fluid pipeline
Dynamic pressure monitors, therefore it is required that the moisture protection of the shell 110 reaches IP66 or more.The concrete shape of the shell 110
And structure, can specifically it be arranged according to demand, as long as the part-structure of processing circuit 130 and sensing head 120 can be wrapped up,
This is not construed as limiting.
The sensing head 120 is the data acquisition components of the dynamic pressure transducer 10, dynamic in environment for acquiring
State pressure data, and the dynamic pressure data of acquisition are converted into the first electric signal, the first electric signal is passed into processing circuit
130 processing.The sensing head 120 may include pressure-sensing device and signal processing unit, and pressure-sensing device is for acquiring
Pressure data, and the pressure data of acquisition is passed into signal processing unit, by signal processing unit by the pressure data of acquisition
Be 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, first will received
After Electric signal processing is at the second electric signal that can be directly received and be applicable in by external equipment, second electric signal can be one
The voltage signal or electric signal that change in range are determined, for reacting certain pressure data.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 dynamic pressure transducer 10 can be with
Including connector and connector 113, the connector 113 is 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
It bears to meet the problem of bearing that oil leak or gas leakage will not occur in the case of 20MPa pressure.Sensing head 120 itself is preferably adopted
Circuit board 131 with 10-32 coaxial jacks, processing circuit 130 is SMA interfaces, in this way, sensing head 120 and circuit board 131 can be with
The cable for turning SMA interfaces by a 10-32 realizes electrical connection.
Wherein, sensing head 120 uses 10-32 coaxial jacks, and the heart of coaxial jack can be single signal output end, pass
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 select the sensor of model 062A06, sensing head 120 to be fixed on connector 113 by the connector.When assembly,
Sensing head 120 is installed on the internal thread of connector, the external screw thread of connector is 1/2-14NPT interfaces, is used for connector
Itself is fixed on connector 113.Screw assembly mode, assembly manipulation is easy, easy to repair and replace.
The performance of the sensing head 120 can be:Measurement range is 0~8.36psi (± 2.5V output);Sensitivity
(± 15%) 300mV/psi;Maximum bears pressure (static state) 2Kpsi;Resolution ratio 0.1mpsi;Minimum response frequency 0.5Hz;Swash
Encourage 12~30VDC of voltage;2~20mA of constant current;Export 3~8V of DC offset voltage etc..In addition, dynamic pressure transducer 10
Used system power supply, supply voltage can be 12VDC to 36VDC, preferably 24VDC power supplys, and design power supply and connect
Mouth is binding post.Performance parameter and power attributes setting so that dynamic pressure transducer 10 is more convenient for assembling, and meets dynamic and press
Power monitoring requirements.
The circuit board 131 for forming the processing circuit 130, may be used FR4 materials, be 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 the circle of 65 millimeters of diameter.The via processing mode of circuit board 131 is
Port lid oil processing to be crossed, without impedance control processing, heavy tin processing is done 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 entirety of dynamic pressure transducer 10
Size.
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 to by connecting terminal on 120 interface circuit of sensing head.
Dynamic pressure transducer 10 provided in this embodiment, sensing head 120 and processor are set in shell 110, and
Shell 110 is wholely set by cast aluminium material with sensor body, increases water proof and dust proof ability.In addition, the feeling of stress of sensing head 120
It answers element to need to stretch out the shell 110, acquires the pressure data in environment.The signal output end of sensing head 120 and processing electricity
The signal input part on road 130 is electrically connected, and after the pressure data acquired is converted to the first electric signal, passes to processing circuit
130 advanced optimize and are processed into the second electric signal so that the second electric signal of output directly can be received and made by external equipment
With, for dynamic pressure monitor or automatically control feedback etc..
Dynamic pressure transducer provided in this embodiment, sensing head acquire the dynamic pressure data in environment, and will acquisition
Dynamic pressure data be converted to the first electric signal to processing circuit, by processing circuit by the first Electric signal processing at the second telecommunications
Output is at a certain range of available signal after number.In this way, when dynamic pressure transducer is set to long transfusion fluid pipeline environment, it can
Effectively to monitor the dynamic pressure variation of long transfusion fluid pipeline, and it is defeated that the dynamic pressure data of monitoring are converted to capable telecommunications number
Go out so that user can judge whether long transfusion fluid pipeline is normal according to the electric signal that dynamic pressure transducer exports, and sentence
There may be adopt an effective measure in time when leakage for fixed length transfusion fluid pipeline.Dramatically improve long transfusion fluid pipe surface
Dynamic pressure monitoring accuracy and timeliness.
On the basis of the above embodiments, the sensing head 120 can be voltage output type component;
As shown in figure 3, the processing circuit 130 may include front end circuit and back-end circuit, the letter of the front end circuit
Number input terminal is electrically connected with the signal output end of the sensing head 120, the signal output end of the front end circuit and the postposition
The signal input part of circuit is electrically connected;
The dynamic pressure data acquired are converted to first voltage signal by the sensing head 120;
The front end circuit is used to convert the first voltage signal to the first current signal;
The back-end circuit is used to first current signal being converted to second 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, the then dynamic that sensing head 120 will be acquired
Pressure data is converted to first voltage signal, then has at the first voltage signal conversion that front end circuit exports sensing head 120
The first current signal is managed into, the first current signal is then converted into second voltage signal by back-end circuit again, you can obtains one
Determine the voltage signal in range.
In the above process, the processing procedure of front end circuit includes mainly:Filtering, amplification, compensation etc., sensing head 120 is defeated
The voltage signal gone out is improved, output current signal.The processing procedure of the back-end circuit includes mainly:Filtering, is mended at amplification
It repays, correct, the voltage signal after front end circuit is improved is converted to current signal.
Specifically, the On The Current Value of first current signal may range from 4 milliamperes to 20 milliamperes, the second voltage
The voltage value range of signal is -10 volts to+10 volts.
In a specific embodiment, as shown in figure 4, the front end circuit may include:Power supply, constant-current source conversion electricity
Road, sensor matching circuit, signal conditioning circuit, current loop circuit and common interface;
The power supply is converted into constant-current source via the constant current power-switching circuit, is transmitted to the power supply of the sensing head 120, institute
It states sensing head 120 and exports first voltage signal when collecting dynamic pressure data, the first voltage signal is via the biography
After sensor match circuit and signal conditioning circuit processing, it is transmitted to the current loop circuit, the current loop circuit is by institute
The electric signal of reception is converted to first current signal, is exported first current signal to institute by the common interface
State back-end circuit.Power supply can be used for for front end circuit, and the consuming parts power supply to entire dynamic pressure transducer 10.
Each circuit module in front end circuit will be explained in detail by specific implementation mode and circuit below.
In one embodiment, the power supply includes positive electricity source circuit and negative electricity source circuit, the positive electricity source circuit and
The negative electricity source circuit is electrically connected with the constant current power-switching circuit;
The positive electricity source circuit is for providing positive supply, and the negative electricity source circuit is for providing negative supply.
As shown in Figure 5 and Figure 6, it is a kind of physical circuit schematic diagram of power supply.Wherein, Fig. 5 is positive electricity source circuit,
TPS7A4101 is capable of providing the Voltage rails of abundant voltage stabilizing, and can bear the quick voltage moment of superelevation, moreover, it can be
Quick voltage moment keeps voltage stabilizing state.TPS7A4101 is responsible for operational amplifier and provides positive supply, which passes through R6 and R7
Resistance value match and control the voltage value size of positive supply circuit output voltage.Resistance R3 can be used for whether test circuit is in
Positive voltage stabilizing state, the Enable Pin connection of resistance R176 and TPS7A4101, the enabled foot for pulling up TPS7A4101 realize shape
State controls, and can play metering function to the circuit.
Fig. 6 be negative electricity source circuit, wherein TPS60400 is a reverse phase charge pump, and efficiency is up to 95%, using C97,
These three capacitances of C99 and C103 can build a negative pressure conversion circuit, can be responsible for operational amplifier and provide negative supply.
Space hold that conversion circuit be set can be saved by reverse phase charge pump on circuit board 131, and negative pressure conversion speed is fast.Negative electricity
In source circuit, resistance R177 is used for test circuit state, and capacitance C74 is for storing energy.
As shown in fig. 7, for 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 gone out is exported from the pin2 of J2.Resistance R65 can be used as test resistance, test the normal power supply shape of power supply
State.Resistance R65 can also paste magnetic pole, to inhibit noise and interference.Capacitance C20 and capacitance C22 in circuit is for executing electricity
Filtering in road and decoupling effect.
As shown in figure 8, for a kind of specific implementation circuit of constant-current source, constant-current source is used to utilize external power supply, is converted to biography
The required constant-current source of sensor.The calculation formula of this constant-current source can be reduced to:Iset ≈ 0.034V/R10 (R11=10*
R10)。
As shown in figure 9, for 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.
As shown in Figure 10, it is a kind of specific implementation of sensor matching circuit.It is special in this sensor matching circuit
Can be the constant-current source that voltage output type sensing head 120 provides 1 milliampere, to support with constant-current source or electric current loop chip
The steady-working state of sensing head 120.1 milliampere of electric current enters sensor from the pin5 of J1, is come out from pin1,2,3,4 of J1.
The signal of sensor is exported from the pin5 of J1.
As shown in Figure 11 to Figure 13, it 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 R169, electricity
Resistance R29, resistance R19 and resistance R23 are the test circuit in circuit, the working condition of test circuit.Capacitance C127 and electricity
Hold C131 and executes filtering and decoupling effect.
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, the input impedance for improving circuit reduces output impedance, to improve circuit
Load capacity.
As shown in figure 14, it is a kind of specific implementation of current loop circuit.In current loop circuit, circuit ring master chip X
TR101AU, inside include high-precision meter amplifier, double matching precision current references can be provided.Capacitance C21 is decoupling
Capacitance, to reserve device.R12 is for test resistance.Resistance R14 and resistance R20 cannot be used simultaneously, can only use it every time
In one.If resistance R14 work, 120 signal of sensing head is without the low-pass filter, if resistance R20 work, sensing head
120 signals pass through low-pass filter.
On the basis of the above embodiments, as shown in Figure 15 and Figure 16, the circuit board 131 where processing circuit 130 may be used also
To include mounting hole MTG1 and MTG2, circuit board 131 can be fixed on shell 110 by mounting hole.On circuit board 131 also
It is provided with shielding case pad MTG9, MTG10, MTG11, MTG12, with reserved shielding case welding position.In addition, circuit board 131
On be additionally provided with optical locating point FD1 and FD2, for SMT patches position.
On the basis of the above embodiment, the circuit board 131 of the processing circuit 130 of sensor is pasted using SMT production lines
Piece welds, and after the completion of welding, can also use board-washing water or absolute alcohol that the removing surface of circuit board 131 is clean, 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 dynamic pressure transducer 10 that the numerous embodiments of the present embodiment provide, can be in environment such as long transfusion fluid pipelines
In carry stablize, the conversion of accurate signal, conditioning and the responsibility sent.The simple production process of dynamic pressure transducer 10,
And assembly easy to process, the sensing head 120 of dynamic pressure transducer 10 can effectively improve pressure with the cooperation of processing circuit 130
The accuracy and timeliness of monitoring.
The embodiment of the present invention further relates to a kind of electronic equipment, and the electronic equipment includes any reality in above-mentioned Fig. 1 to Figure 15
Apply the dynamic pressure transducer described in example.
The electronic equipment can include but is not limited to compression pump, hydraulic line connector etc. and have dynamic pressure tactility apparatus
Equipment is not construed as limiting.
Electronic equipment provided in this embodiment, the dynamic pressure transducer applied include sensing head, shell, and setting
Processing circuit in the shell, sensing head acquire the dynamic pressure data in environment, and by the dynamic pressure data of acquisition
The first electric signal is converted to processing circuit, is exported the first Electric signal processing at certain at after the second electric signal by processing circuit
Available signal in range.In this way, when dynamic pressure transducer is set to long transfusion fluid pipeline environment, it is defeated can effectively to monitor length
The dynamic pressure of fluid pipeline changes, and the dynamic pressure data of monitoring are converted to capable telecommunications number output so that Yong Huke
Judge whether long transfusion fluid pipeline is normal with the electric signal exported according to dynamic pressure transducer, and is judging long transfusion fluid pipeline
There may be adopting an effective measure in time when leakage, the standard of the dynamic pressure monitoring of long transfusion fluid pipeline is dramatically improved
True property and timeliness.The specific implementation process of electronic equipment provided in an embodiment of the present invention may refer to above-described embodiment offer
The specific implementation process of dynamic pressure transducer, this is no longer going to repeat them.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.
Claims (10)
1. a kind of dynamic pressure transducer, which is characterized in that including:Shell, sensing head and processing circuit;
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 used to acquire dynamic pressure data, and the dynamic pressure data acquired 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 being exported after the second electric signal.
2. dynamic pressure transducer according to claim 1, which is characterized in that the sensing head is voltage output type portion
Part;
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 is electrically connected, and the signal output end of the front end circuit is electrically connected with the signal input part of the back-end circuit;
The dynamic pressure data acquired are converted to first voltage signal by the sensing head;
The front end circuit is used to convert the first voltage signal to the first current signal;
The back-end circuit is used to first current signal being converted to second voltage signal.
3. dynamic pressure transducer according to claim 2, which is characterized in that the front end circuit includes:Power supply, constant current
Power-switching circuit, sensor matching circuit, signal conditioning circuit, current loop circuit and common interface;
The power supply is converted into constant-current source via the constant current power-switching circuit, is transmitted to the sensing head power supply, the sensing
Head exports first voltage signal when collecting dynamic pressure data, and the first voltage signal is via sensor matching electricity
Behind road and signal conditioning circuit processing, it is transmitted to the current loop circuit, the telecommunications that the current loop circuit will be received
Number first current signal is converted to, is exported first current signal to postposition electricity by the common interface
Road.
4. dynamic pressure transducer according to claim 3, which is characterized in that the On The Current Value of first current signal
Ranging from 4 milliamperes to 20 milliamperes;
The voltage value range of the second voltage signal is -10 volts to+10 volts;And/or
The output current of the constant current power-switching circuit is 1mA.
5. dynamic pressure transducer according to claim 4, which is characterized in that the shell is outside the waterproof of cast aluminium material
Shell.
6. dynamic pressure transducer according to claim 5, which is characterized in that the power supply includes positive electricity source circuit and bears
Power circuit, the positive electricity source circuit and the negative electricity source circuit are electrically connected with the constant current power-switching circuit;
The positive electricity source circuit is for providing positive supply, and the negative electricity source circuit is for providing negative supply.
7. dynamic pressure transducer according to claim 6, which is characterized in that the signal conditioning circuit includes low pass filtered
Wave circuit, the low-pass filter circuit by frequency be 10050Hz.
8. dynamic pressure transducer according to claim 7, which is characterized in that the signal conditioning circuit further includes voltage
Follower, the voltage follower are set to the output end of the low-pass filter.
9. dynamic pressure transducer according to claim 1, which is characterized in that further include connector and connector, it is described
Connector is set on the shell;
The sensing head is connect with the threaded one end of the connector, and the other end of the connector connects with the connector screw thread
It connects.
10. a kind of electronic equipment, which is characterized in that including dynamic pressure sensing as claimed in any one of claims 1-9 wherein
Device.
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CN201184833Y (en) * | 2008-03-18 | 2009-01-21 | 张小明 | Novel tube pressure sensor |
CN202101785U (en) * | 2011-05-19 | 2012-01-04 | 常州大学 | Intelligent wireless diffused silicon pressure transmitter |
CN202255744U (en) * | 2011-09-16 | 2012-05-30 | 北京安控科技股份有限公司 | Wireless pressure sensor |
CN103775833A (en) * | 2014-01-09 | 2014-05-07 | 中国石油天然气股份有限公司 | Pipeline leakage monitoring system and method |
CN204328489U (en) * | 2014-11-26 | 2015-05-13 | 上海科崎物联网科技有限公司 | A kind of signal conditioner for oil and gas pipeline leakage detection |
CN208635960U (en) * | 2018-06-05 | 2019-03-22 | 北京目黑科技有限公司 | A kind of dynamic pressure transducer and electronic equipment |
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