CN208635960U - 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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- CN208635960U CN208635960U CN201820857493.4U CN201820857493U CN208635960U CN 208635960 U CN208635960 U CN 208635960U CN 201820857493 U CN201820857493 U CN 201820857493U CN 208635960 U CN208635960 U CN 208635960U
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Abstract
The utility model provides a kind of dynamic pressure transducer and electronic equipment, and wherein dynamic pressure transducer includes: shell, sensing head and processing circuit；The sensing head is set on the shell, and the conditioning 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 conditioning circuit；Dynamic pressure data collected are converted to the first electric signal, and first electric signal is passed to processing circuit for acquiring dynamic pressure data by the sensing head；The processing circuit is used for first Electric signal processing at exporting 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, make user judges whether long transfusion fluid pipeline is normal according to output electric signal, and there may be adopt an effective measure in time when leakage determining long transfusion fluid pipeline.Dramatically improve the accuracy and timeliness of the dynamic pressure monitoring of long transfusion fluid pipeline.
Description
Technical field
The utility model relates to automatic control technology field, in particular to a kind of dynamic pressure transducer and electronic equipment.
Background technique
In long transfusion fluid pipeline engineering, needs to carry out long transfusion fluid pipeline leakage monitoring, 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, and is referred to as to be 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
Monitoring Changshu fluid pipeline whether there is leakage point.However, 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 the technical problem that existing dynamic liquid pipe monitoring scheme is poor there are leakage point monitoring effect.
Utility model content
The utility model embodiment provides a kind of dynamic pressure transducer and electronic equipment, to solve existing dynamic liquid pipe
The road monitoring scheme technical problem poor there are leakage point monitoring effect.
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 dynamic pressure transducer, comprising: 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；
Dynamic pressure data collected are converted to the first telecommunications for acquiring dynamic pressure data by the sensing head
Number, 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 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；
Dynamic pressure data collected are converted to first voltage signal by the sensing head；
The front end circuit is used to convert the first current signal for the first voltage 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 is received by institute
Electric signal is converted to first current signal, is exported first current signal to the postposition by the common interface
Circuit.
Optionally, the On The Current Value range of first current signal is 4 milliamperes to 20 milliamperes；
The voltage value range of the second voltage signal is -10 volts to+10 volts.
Optionally, the output electric 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.
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
Dynamic pressure transducer.
In the utility model embodiment, provided dynamic pressure transducer includes sensing head, shell, and is set to institute
State the processing circuit in shell, sensing head acquires the dynamic pressure data in environment, and by the dynamic pressure data conversion of acquisition
It is the first electric signal to processing circuit, is exported the first Electric signal processing at a certain range at after the second electric signal by processing circuit
Interior available signal.In this way, can effectively monitor long transfusion fluid when dynamic pressure transducer is set to long transfusion fluid pipeline environment
The dynamic pressure of pipeline changes, and the dynamic pressure data of monitoring are converted to capable telecommunications number output, allows user's root
Judge whether long transfusion fluid pipeline is normal according to the electric signal that dynamic pressure transducer exports, and is determining that long transfusion fluid pipeline may
It adopts an effective measure in time when in the presence of leakage, dramatically improves the accuracy of the dynamic pressure monitoring of long transfusion fluid pipeline
And timeliness.
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 dynamic pressure transducer provided by the embodiment of the utility model；
Fig. 2 a to Fig. 2 e is the partial structure diagram of dynamic pressure transducer provided by the embodiment of the utility model；
Fig. 3 to Figure 16 is the structural representation of the processing circuit of dynamic pressure transducer provided by the embodiment of the utility model
Figure.
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 dynamic pressure transducer provided by the embodiment of the utility model.Such as Fig. 1 institute
Show, a kind of dynamic pressure transducer 10, comprising: 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 dynamic pressure data collected
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.
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 is all set 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 to be damaged by liquid, the dust etc. 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 monitoring, 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, by institute received first
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 changed in range is 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 and bears the problem of oil leak or gas leakage will not occur in the case where 20MPa pressure.Sensing head 120 itself is preferably adopted
With 10-32 coaxial jack, the circuit board 131 of processing circuit 130 is SMA interface, in this way, sensing head 120 and circuit board 131 can be with
Electrical connection is realized by the cable 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 1/2-14NPT interface, is used for connector
Itself is fixed on connector 113.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: 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 supply, 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 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 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 on 120 interface circuit of sensing head by connecting terminal.
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 and processing electricity of sensing head 120
The signal input part on road 130 is electrically connected, and after pressure data collected is 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, monitor for dynamic pressure 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
Out, allow user to judge whether long transfusion fluid pipeline is normal according to the electric signal that dynamic pressure transducer exports, and sentencing
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；
Dynamic pressure data collected are converted to first voltage signal by the sensing head 120；
The front end circuit is used to convert the first current signal for the first voltage 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, then sensing head 120 is by dynamic collected
Pressure data is converted to first voltage signal, at the first voltage signal conversion for then having front end circuit to export 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, can be obtained one
Determine the voltage signal in range.
In the above process, the treatment process of front end circuit specifically includes that filtering, amplification, compensation etc., and sensing head 120 is defeated
Voltage 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 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 sensing head 120 and powers, 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
Received electric signal 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 electrical component power supply to entire dynamic pressure transducer 10.
Below each circuit module in front end circuit will be explained in detail by specific embodiment and circuit.
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.
It as shown in Figure 5 and Figure 6, is a kind of physical circuit schematic diagram of power supply.Wherein, Fig. 5 is positive power circuit,
TPS7A4101 is capable of providing the Voltage rails of abundant pressure stabilizing, and is able to bear the quick voltage moment of superelevation, moreover, it can be
Quick voltage moment keeps pressure stabilizing state.TPS7A4101 is responsible for operational amplifier and provides positive supply, which passes through R6 and R7
Resistance value proportion control the voltage value size of positive supply circuit output voltage.Resistance R3 can be used for testing whether circuit is in
Positive pressure stabilizing state, the enable end connection of resistance R176 and TPS7A4101, the enabled foot for pulling up TPS7A4101 realize shape
State control, and metering function can be played to the circuit.
Fig. 6 is negative power circuit, wherein TPS60400 is a reverse phase charge pump, and efficiency is up to 95%, using C97,
These three capacitors 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 on circuit board 131 by reverse phase charge pump, and negative pressure conversion speed is fast.Negative electricity
In source circuit, resistance R177 is for testing circuit state, and capacitor C74 is for storing energy.
As shown in fig. 7, 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 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.Capacitor C20 and capacitor C22 in circuit is for executing electricity
Filtering and decoupling effect in road.
As shown in figure 8, being a kind of specific implementation circuit of constant-current source, constant-current source is used to utilize external power supply, is converted to biography
Constant-current source required for sensor.The calculation formula of this constant-current source can simplify are as follows: Iset ≈ 0.034V/R10 (R11=10*
R10)。
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 sensor matching circuit.It is special in this sensor matching circuit
With constant-current source or electric current loop chip, 1 milliampere of constant-current source can be provided for voltage output type sensing head 120, to support
The steady-working state of sensing head 120.1 milliampere of electric current enters sensor from the pin5 of J1, comes out from pin1,2,3,4 of J1.
The signal of sensor is exported from the pin5 of J1.
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 R169, electricity
Resistance R29, resistance R19 and resistance R23 are the test circuit in circuit, test the working condition of circuit.Capacitor 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, for improving the input impedance of circuit, output impedance is reduced, to improve circuit
Load capacity.
It as shown in figure 14, 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.Capacitor C21 is decoupling
Capacitor, 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 works, 120 signal of sensing head is without the low-pass filter, if resistance R20 works, 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 fixation hole MTG1 and MTG2, circuit board 131 can be fixed on shell 110 by fixation 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 patch position.
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 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 and the cooperation of processing circuit 130 can effectively improve pressure
The accuracy and timeliness of monitoring.
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 15
Dynamic pressure transducer described in one embodiment.
The electronic equipment can include but is not limited to pressure pump, hydraulic line connector etc. and have dynamic pressure tactility apparatus
Equipment is not construed as limiting.
Electronic equipment provided in this embodiment, applied dynamic pressure transducer 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, it is defeated can effectively to monitor length when dynamic pressure transducer is set to long transfusion fluid pipeline environment
The dynamic pressure of fluid pipeline changes, and the dynamic pressure data of monitoring are converted to capable telecommunications number output, so that user can
Judge whether long transfusion fluid pipeline is normal with the electric signal exported according to dynamic pressure transducer, and is determining 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 by the embodiment of the utility model may refer to above-described embodiment and mention
The specific implementation process of the dynamic pressure transducer of confession, 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 (9)
1. a kind of dynamic pressure transducer characterized by comprising 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 dynamic pressure 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.
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 electrical connection, the signal output end of the front end circuit are electrically connected with the signal input part of the back-end circuit；
Dynamic pressure data collected are converted to first voltage signal by the sensing head；
The front end circuit is used to convert the first current signal for the first voltage 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 the sensor matching electricity
Behind road and signal conditioning circuit processing, it is transmitted to the current loop circuit, the current loop circuit is by the received telecommunications of institute
Number first current signal is converted to, is exported first current signal to the 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
Range is 4 milliamperes to 20 milliamperes；
The voltage value range of the second voltage signal is -10 volts to+10 volts；And/or
The output electric 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 1, which is characterized in that it 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 and the connector screw thread connect
It connects.
9. a kind of electronic equipment, which is characterized in that including dynamic pressure transducer such as described in any item of the claim 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820857493.4U CN208635960U (en) | 2018-06-05 | 2018-06-05 | A kind of dynamic pressure transducer and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820857493.4U CN208635960U (en) | 2018-06-05 | 2018-06-05 | A kind of dynamic pressure transducer and electronic equipment |
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| CN208635960U true CN208635960U (en) | 2019-03-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108760146A (en) * | 2018-06-05 | 2018-11-06 | 北京目黑科技有限公司 | A kind of dynamic pressure transducer and electronic equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108760146A (en) * | 2018-06-05 | 2018-11-06 | 北京目黑科技有限公司 | A kind of dynamic pressure transducer and electronic equipment |
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