CN107525551A - Vortex-shedding meter - Google Patents
Vortex-shedding meter Download PDFInfo
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- CN107525551A CN107525551A CN201710878536.7A CN201710878536A CN107525551A CN 107525551 A CN107525551 A CN 107525551A CN 201710878536 A CN201710878536 A CN 201710878536A CN 107525551 A CN107525551 A CN 107525551A
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- 238000012545 processing Methods 0.000 claims abstract description 42
- 238000004891 communication Methods 0.000 claims abstract description 29
- 230000009977 dual effect Effects 0.000 claims abstract description 8
- 239000000523 sample Substances 0.000 claims abstract description 8
- 239000000919 ceramic Substances 0.000 claims abstract description 6
- 238000001914 filtration Methods 0.000 claims description 21
- 230000005611 electricity Effects 0.000 claims description 6
- 239000012530 fluid Substances 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000006855 networking Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000010183 spectrum analysis Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/20—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow
- G01F1/32—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow using swirl flowmeters
- G01F1/325—Means for detecting quantities used as proxy variables for swirl
- G01F1/3259—Means for detecting quantities used as proxy variables for swirl for detecting fluid pressure oscillations
- G01F1/3266—Means for detecting quantities used as proxy variables for swirl for detecting fluid pressure oscillations by sensing mechanical vibrations
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Abstract
The present invention provides a kind of vortex-shedding meter, which solves existing vortex-shedding meter antidetonation poor anti jamming capability, communication has the technical problem of potential safety hazard.Vortex-shedding meter transmits information by way of passing biography, and provided with Sensor section, circuit processing part, piezoelectric ceramic piece is provided with inside Sensor section, it is characterized in that, antenna is additionally provided with, Sensor section is connected by screen bar with circuit processing part, and circuit processing part is connected with antenna；Sensor portion is arranged with dual probe structure sensor, and dual probe structure sensor is provided with first sensor, second sensor；First sensor is set in the duct, and second sensor is located at outside pipeline.It the composite can be widely applied to the flow measurement of industrial pipeline medium fluid.
Description
Technical field
The present invention relates to a kind of vortex-shedding meter, more particularly to a kind of jamproof vortex-shedding meter of antidetonation.
Background technology
Vortex-shedding meter is mainly used in the flow measurement of industrial pipeline medium fluid, such as a variety of Jie of gas, liquid, steam
Matter.Be characterized in that the pressure loss is small, range ability is big, and precision is high, in Test Cycle volume flow hardly by fluid density,
The influence of the parameters such as pressure, temperature, viscosity.Without moving machinery part, therefore reliability is high, and maintenance is small.
Traditional vortex-shedding meter is to produce electric signal by the vibration of piezoelectric ceramics, is entered by high pass, low pass, bandpass filtering
Row processing produces sine wave, and produce square wave by Schmidt trigger carries out frequency processing, local communication mode master to single-chip microcomputer
If 4-20MA, pulse and RS485.
But traditional vortex-shedding meter antidetonation poor anti jamming capability, it is easy to disturbed by live vibration, scene, which has, to shake
Dynamic or forceful electric power interference signal will be added in the waveform of useful signal, metering inaccuracy occur, not low enough the upper limit of lower limit is not
The problems such as enough high, communication modes field wiring trouble, there is also by wire transmission in the severe place of many installation environments
Potential safety hazard, wired mode are also highly susceptible to artificial and environment destruction.
The content of the invention
The technical problem of potential safety hazard for existing vortex-shedding meter antidetonation poor anti jamming capability, communication be present in the present invention,
The vortex-shedding meter that a kind of antidetonation antijamming capability is good, potential safety hazard is not present in communication is provided.
Therefore, the technical scheme is that, provided with Sensor section, circuit processing part, set inside Sensor section
There is piezoelectric ceramic piece, it is characterized in that, vortex-shedding meter transmits information by way of passing biography, is additionally provided with antenna, Sensor section
It is connected by screen bar with circuit processing part, circuit processing part is connected with antenna；Sensor portion is arranged with dual probe structure
Sensor, dual probe structure sensor are provided with first sensor, second sensor；First sensor is set in the duct, and second passes
Sensor is located at outside pipeline；
Circuit processing part includes electric charge amplifying unit, bandpass filtering unit, signal processing unit and radio communication unit；
The output end of first sensor is connected with the input of electric charge amplifying unit, the output end and signal processing unit of second sensor
Connection, the output end of electric charge amplifying unit are connected with the input of bandpass filtering unit, the output end and letter of bandpass filtering unit
The input connection of number processing unit, the output end of signal processing unit and the input of radio communication unit connect, channel radio
The output end of news unit is connected with antenna.
Preferably, electric charge amplifying unit is provided with the first operational amplifier, and the first operational amplifier draws provided with the 5th pin, the 6th
Pin and the 7th pin, the 5th pin are IN+ pins, and the 6th pin is IN- pins, and the 7th pin is Vout pins；
The output end of first sensor is divided into two-way, is connected all the way by the 7th electric capacity with the 5th pin, and another way passes through
Six electric capacity are connected with the 6th pin, the 7th electric capacity, the 6th electric capacity input between be connected with the 11st resistance, the 6th pin, the 7th
The 6th resistance, the 7th resistance are in series between pin, the 5th pin after the 16th resistance, the 19th resistant series with being grounded；6th
The first toggle switch unit is also associated between pin, the 7th pin.
Preferably, bandpass filtering unit is provided with the second operational amplifier, the 3rd operational amplifier, and the second operational amplifier is set
There are the 1st pin, the 2nd pin and the 8th pin, the 1st pin is Vout pins, the 2nd pin is IN- pins, the 3rd pin is that IN+ draws
Pin, the 8th pin are Vs+ pins；
3rd pin is connected by the tenth resistance with the 7th pin of the first operational amplifier, the 3rd pin and the 9th electric capacity,
It is grounded after the series connection of 12 electric capacity；2nd pin is connected by the 15th resistance with the 1st pin, and the 15th resistor coupled in parallel has the 15th
Electric capacity；For 8th pin with being grounded after the 5th capacitance connection, the 2nd pin is also associated with the 4th toggle switch unit.
Preferably, the 3rd operational amplifier is provided with the 10th pin, the 11st pin, and the 10th pin is IN- pins, the 11st pin
For Vout pins；
After 10th pin is connected with the 13rd resistance, the 12nd resistance, the 8th electric capacity C8, with the second operational amplifier
1 pin connects；The common port of the 8th resistance, the 12nd resistance and the 13rd resistance is connected between 10th pin and the 11st pin
After being connected with the 9th resistance, amplitude limiter circuit, it is connected with the 11st pin；12nd resistance, the common port of the 13rd resistance are connected with
Second toggle switch unit, the 3rd toggle switch unit is also associated between the 10th pin, the 11st pin.
Preferably, signal processing unit is provided with digital signal processing chip TMS320F28335.
Preferably, radio communication unit is provided with wireless data sending chip CC1101.
Preferably, the first operational amplifier, the second operational amplifier and the 3rd operational amplifier select SGM8532 cores
Piece.
Preferably, the first toggle switch unit, the second toggle switch unit and the 3rd toggle switch unit are equipped with 8 and dialled
Code switch, the 4th toggle switch unit are provided with 4 toggle switch.
Preferably, amplitude limiter circuit is made up of two a positive and a negative diode in parallel, the model 1N4148 of diode.
The invention has the advantages that the flow signal of first sensor is by electric charge amplifying unit, bandpass filtering unit,
By signal amplify filtering process into primary waveform signal, collection signal is then AD converted by signal processing unit again,
FFT spectrum analysis, waveform is decomposed, then is made a distinction by the vibration signal of second sensor and judged have
The flow signal of effect, string is come in each when can effectively filter out the vibration signal and low frequency that are easiest to influence vortex-shedding meter
Kind clutter and interference signal.Radio communication unit is then sent to, radio communication unit sends a signal to antenna, and antenna will be believed
Number it is sent to by base station on website, facilitates customer inquiries.Antidetonation strong antijamming capability of the present invention, reliable results, transmit data
Safely, conveniently.Live networking is carried out by radio communication unit, takes the mode for passing biography to be transmitted, each instrument can root
According to wireless signal intensity, data are transmitted to from its nearest, most stable of instrument of communication, ensure that communication distance.
Brief description of the drawings
Fig. 1 is the structural representation of vortex-shedding meter of the present invention；
Fig. 2 is the structural representation of inventive sensor part；
Fig. 3 is connection diagram of the present invention；
Fig. 4 is the electric charge amplifying unit of the present invention, the schematic diagram of bandpass filtering unit；
Fig. 5 is the schematic diagram of the first toggle switch unit of the invention；
Fig. 6 is the schematic diagram of the second toggle switch unit of the invention；
Fig. 7 is the schematic diagram of the 3rd toggle switch unit of the invention；
Fig. 8 is the schematic diagram of the 4th toggle switch unit of the invention；
Fig. 9 is signal processing unit partial schematic diagram of the present invention；
Figure 10 is radio communication unit schematic diagram of the present invention.
Symbol description in figure：
1. Sensor section；2. circuit processing part；3. antenna；4. first sensor；5. second sensor；6. electric charge is put
Big unit；7. bandpass filtering unit；8. signal processing unit；9. radio communication unit.
Embodiment
The present invention is described further with reference to embodiment.
As Figure 1-3, vortex-shedding meter is divided into three parts, is Sensor section 1, circuit processing part 2 and day respectively
Line 3, Sensor section 1 are connected with circuit processing part 2, and circuit processing part 2 is connected with antenna 3.
The inside of Sensor section 1 is piezoelectric ceramic piece, and electric signal is produced by vibrating.Sensor section 1 is provided with dual probe
Structure sensor, dual probe structure sensor include first sensor 4, second sensor 5.First sensor 4, which is installed, vacantly to exist
In pipeline, for measuring flow signal.Second sensor 5 is arranged on outside pipeline, for vibration signal caused by measurement table body.It is logical
Cross first sensor 4 and detect flow signal, by the exclusive PCR vibration signal of second sensor 5, the range ratio of flow can be with
Reach 1/30, be 3 times of traditional vortex-shedding meter range ratio.
The signal detected is transferred to by first sensor 4, second sensor 5 by the screen bar among vortex-shedding meter
Circuit processing part 2.
Circuit processing part 2 includes electric charge amplifying unit 6, bandpass filtering unit 7, signal processing unit 8 and wireless telecommunications
Unit 9, the input of electric charge amplifying unit 6 are connected with first sensor 4, the output end and bandpass filtering of electric charge amplifying unit 6
The input connection of unit 7, the output end of bandpass filtering unit 7 are connected with the input of signal processing unit 8, signal transacting list
The output end of member 8 is connected with the input of radio communication unit 9, and the output end of radio communication unit 9 is connected with antenna 3.
Electric charge amplifying unit 6 adjusts the intensity that piezoelectric ceramic piece is produced electric signal by vibration, and bandpass filtering unit 7 determines have
Imitate the frequency range and amplitude of signal.
As Figure 4-8, electric charge amplifying unit 6 is provided with the first operational amplifier, the first toggle switch K1.Bandpass filtering list
Member 7 is provided with the second operational amplifier, the 3rd operational amplifier, the second toggle switch K2 and the 3rd toggle switch K3.First computing
The output end of amplifier is connected with the input of the second operational amplifier, and the output end of the second operational amplifier is put with the 3rd computing
The input connection of big device.First operational amplifier is connected with the first toggle switch K1, the second operational amplifier and the 4th dial-up
GB1 connections are switched, the 3rd operational amplifier is connected with the second toggle switch K2, the 3rd toggle switch K3.
First operational amplifier, the second operational amplifier and the 3rd operational amplifier are respectively the first SGM8532 chips
U2B, the 2nd SGM8532 chips U2A and the 3rd SGM8532 chips U3B.First toggle switch K1, the second toggle switch K2, the 3rd
Toggle switch K3 is 8 toggle switch, and the 4th toggle switch GB1 is 4 toggle switch.First SGM8532 chips U2B is provided with
5th pin, the 6th pin, the 7th pin, the 5th pin are IN+ pins, and the 6th pin is IN- pins, and the 7th pin is Vout pins.
The output end of first sensor 4 is divided into two-way, is connected all the way by the 7th electric capacity C7 with IN+ pins, another way is led to
The 6th electric capacity C6 is crossed to be connected with IN- pins.7th electric capacity C7, the 6th electric capacity C6 input between be connected with the 11st resistance
R11.The 6th resistance R6, the 7th resistance R7, IN+ pins and the 16th resistance R16, are in series between IN- pins, Vout pins
It is grounded after 19 resistance R19 series connection.Vout pins are connected with the input of bandpass filtering unit 7.IN- pins, Vout pins it
Between be also associated with the first toggle switch unit.
First toggle switch unit is provided with 16 pins provided with the first toggle switch K1, the first toggle switch K1.1st draws
Pin, the 2nd pin, the 3rd pin, the 4th pin respectively with the 20th resistance R20, the 18th electric capacity C18, the 17th electric capacity C17,
16 electric capacity C16 connections, the 20th resistance the R20 other end and the 18th electric capacity C18, the 17th electric capacity C17, the 16th electric capacity
The C16 other end is joined together to form K1C ends.5th pin, the 6th pin, the 7th pin, the 8th pin are electric with the 17th respectively
Hinder R17, the 14th electric capacity C14, the 13rd electric capacity C13, the tenth electric capacity C10 connections, the 17th resistance R17 other end and the tenth
Four electric capacity C14, the 13rd electric capacity C13, the tenth electric capacity C10 other end are joined together to form K1B ends.13rd pin, the 14th
Pin, the 15th pin and the 16th pin form K1A ends after linking together.9th pin, the 10th pin, the 11st pin and the 12nd
Pin is grounded after linking together.
K1A ends are connected with the first SGM8532 chips U2B Vout pins, K1B ends and the first SGM8532 chips U2B IN
+ pin is connected, and K1C ends are connected with the first SGM8532 chips U2B IN- pins.
2nd SGM8532 chips U2A is provided with the 1st pin, the 2nd pin, the 3rd pin, the 4th pin and the 8th pin.1st draws
Pin is Vout pins, and the 2nd pin is IN- pins, and the 3rd pin is IN+ pins, and the 4th pin is Vs- pins, and the 8th pin is Vs+
Pin.IN+ pins are connected by the tenth resistance R10 with the first SGM8532 chips U2B Vout pins, IN+ pins and the 9th electricity
It is grounded after holding C9, the 12nd electric capacity C12 series connection.IN- pins are connected by the 15th resistance R15 with Vout pins, the 15th electricity
It is in parallel with the 15th resistance R15 to hold C15.Vs+ pins are connected with power supply, and Vs+ pins are grounded after being connected with the 5th electric capacity C5.Vs-
Pin is grounded.IN- pins are also connected with the 4th toggle switch unit.19th electric capacity C19, the 12nd electric capacity C12 are decoupling electricity
Hold.
4th toggle switch unit is provided with the 4th toggle switch GB1, and the 4th toggle switch GB1 is provided with eight pins, and the 1st draws
Pin, the 2nd pin, the 3rd pin, the 4th pin be connected after be grounded, the 5th pin, the 6th pin, the 7th pin, the 8th pin respectively with electricity
Hinder RG4, resistance RG3, resistance RG2, resistance RG1 connections, the resistance RG4 other end and resistance RG1, resistance RG2, resistance RG3
The other end is connected to form GBB ends.
GBB ends are connected with the 2nd SGM8532 chips U2A IN- pins.
3rd SGM8532 chips U3B is provided with the 9th pin, the 10th pin, the 11st pin, and the 9th pin is IN+ pins, and the 10th
Pin is IN- pins, and the 11st pin is Vout pins.IN+ pins are grounded, and the 8th is connected between IN- pins and Vout pins
After resistance R8, IN- pin is connected with the 13rd resistance R13, the 12nd resistance R12, the 8th electric capacity C8, with the 2nd SGM8932 cores
Piece U2A Vout pins connection.12nd resistance R12 and the 13rd resistance R13 common port and the 9th resistance R9, amplitude limiter circuit
After connection, it is connected with the 3rd SGM8932 chips U3B Vout pins.8th resistance R8, amplitude limiter circuit and Vout pins it is public
End is connected with TP1 lines, and TP1 lines export the flow signal of filtered first sensor 4.Amplitude limiter circuit by two a positive and a negative simultaneously
The diode composition of connection, the model 1N4148 of diode.
Second toggle switch unit is provided with 16 pins provided with the second toggle switch K2, the second toggle switch K2.1st draws
Pin, the 2nd pin, the 3rd pin, the 4th pin, the 5th pin, the 6th pin, the 7th pin, the 8th pin respectively with electric capacity CL8, electric capacity
CL7, electric capacity CL6, electric capacity CL5, electric capacity CL4, electric capacity CL3, electric capacity CL2, electric capacity CL1 connections.The electric capacity CL8 other end and electric capacity
CL7, electric capacity CL6, electric capacity CL5, electric capacity CL4, electric capacity CL3, electric capacity CL2, the electric capacity CL1 other end are connected to form K2B ends.9th
Pin, the 10th pin, the 11st pin, the 12nd pin, the 13rd pin, the 14th pin, the 15th pin and the 16th pin, which are connected, to be followed by
Ground.
K2B ends are connected with the 12nd resistance R12, the 13rd resistance R13 common port.
3rd toggle switch unit is provided with the 3rd toggle switch K3, and the 3rd toggle switch K3 is provided with 16 pins, and the 1st draws
Pin, the 2nd pin, the 3rd pin, the 4th pin, the 5th pin, the 6th pin, the 7th pin, the 8th pin respectively with electric capacity CH8, electric capacity
CH7, electric capacity CH6, electric capacity CH5, electric capacity CH4, electric capacity CH3, electric capacity CH2, electric capacity CH1 connections.The electric capacity CH8 other end and electric capacity
CH7, electric capacity CH6, electric capacity CH5, electric capacity CH4, electric capacity CH3, electric capacity CH2, the electric capacity CH1 other end are connected to form K3C ends.9th
Pin, the 10th pin, the 11st pin, the 12nd pin, the 13rd pin, the 14th pin, the 15th pin and the 16th pin are connected to form
K3A ends.
The input, output end of K3A ends, K3C ends respectively with the 8th resistance R8 is connected.
Different resistance, electric capacity are accessed by toggle switch, realize different filter effects.
As shown in figure 9, signal processing unit 8 is provided with digital signal processing chip TMS320F28335, TMS320F28335
It is that the dsp chip for having powerful floating point arithmetic ability and AD conversion that TI companies produce can meet to require.Digital Signal Processing
Chip TMS320F28335 is provided with 5-12 pins, the 41st pin and the 42nd pin.5-12 pins be respectively GPIO0 pins,
GPIO0 pins, GPIO1 pins, GPIO2 pins, GPIO3 pins, GPIO4 pins and GPIO5 pins, are output end.41st
Pin is ADCINA1 pins, and the 42nd pin is ADCINA0 pins, is AD sampling inputs.
TP1 lines are connected with digital signal processing chip TMS320F28335 ADCINA0 pins, and AD is carried out to flow signal
Sampling.Second sensor 5 is connected with digital signal processing chip TMS320F28335 ADCINA1 pins, constant for measuring
Vibration interference signal.
Then digital signal processing chip TMS320F28335 goes out useful signal by quick FFT progress spectrum analyses, leads to
Cross GPIO0 pins, GPIO1 pins, GPIO2 pins, GPIO3 pins, GPIO4 pins and the output of GPIO5 pins.
As shown in Figure 10, radio communication unit draws provided with wireless data sending chip CC1101, the 3-11 of wireless data sending chip
Pin be respectively si pins, sclk pins, so pins, gdo2 pins, gdo0 pins, csn pins, gnd2 pins, ant pins,
Gnd1 pins.Si pins, sclk pins, so pins, gdo2 pins, gdo0 pins, csn pins are input, respectively with numeral
Signal processor TMS320F28335 GPIO0 pins, GPIO1 pins, GPIO2 pins, GPIO3 pins, GPIO4 pins and
GPIO5 pins connect.Gnd1 pins, gnd2 pins ground connection, ant pins are connected with antenna 3, output data.
The flow signal of first sensor 4 is amplified signal at filtering by electric charge amplifying unit 6, bandpass filtering unit 7
The waveform signal of primary is managed into, collection signal, FFT frequency are then AD converted by signal processing unit 8 again
Spectrum analysis, waveform is decomposed, then is made a distinction by the vibration signal of second sensor 5 and judged effective flow signal, can
The effective various clutters for going here and there to come in when being easiest to influence the vibration signal and low frequency of vortex-shedding meter that filter out are believed with interference
Number.Radio communication unit 9 is then sent to, radio communication unit 9 sends a signal to antenna 3, and signal is passed through base station by antenna 3
It is sent on website, facilitates customer inquiries.
Antidetonation strong antijamming capability of the present invention, reliable results, transmission data safety, convenient.Entered by radio communication unit 9
The live networking of row, takes the mode for passing biography to be transmitted, and data can be packed and sent out according to wireless signal intensity by each instrument
Give from its nearest, most stable of instrument of communication, ensure that communication distance.Jump set is used when an instrument does not communicate, together
Shi Shangchuan warning messages, ensure the success rate and validity of data transmission.Radio frequency band start selection is 410M, and wavelength length has
It is anti-interference, across the characteristics of building ability is strong, communication robust., can be with automatic frequency adjustment again group if running into same band interference
Net ensures the reliability of communication, and user can select the form of write by hand device or computer to read data, convenient, safety, fast.
Only as described above, be only the present invention specific embodiment, when the model implemented of the present invention can not be limited with this
Enclose, therefore the displacement of its equivalent assemblies, or the equivalent variations made according to scope of patent protection of the present invention and modification, it all should still belong to this hair
The category that bright claims are covered.
Claims (9)
1. a kind of vortex-shedding meter, it is provided with piezoelectricity provided with Sensor section, circuit processing part, inside the Sensor section and makes pottery
Ceramics, it is characterized in that, the vortex-shedding meter transmits information by way of passing biography, is additionally provided with antenna, the Sensor section
It is connected by screen bar with the circuit processing part, the circuit processing part is connected with antenna；The sensor portion sets up separately
There is dual probe structure sensor, the dual probe structure sensor is provided with first sensor, second sensor；First sensing
Device is set in the duct, and the second sensor is located at outside pipeline；
The circuit processing part includes electric charge amplifying unit, bandpass filtering unit, signal processing unit and radio communication unit；
The output end of the first sensor is connected with the input of the electric charge amplifying unit, the output end of the second sensor with
The signal processing unit connection, the output end of the electric charge amplifying unit are connected with the input of the bandpass filtering unit,
The output end of the bandpass filtering unit is connected with the input of the signal processing unit, the output of the signal processing unit
End is connected with the input of the radio communication unit, and the output end of the radio communication unit is connected with antenna.
2. vortex-shedding meter according to claim 1, it is characterised in that the electric charge amplifying unit is put provided with the first computing
Big device, first operational amplifier are provided with the 5th pin, the 6th pin and the 7th pin, and the 5th pin is IN+ pins, described
6th pin is IN- pins, and the 7th pin is Vout pins；
The output end of the first sensor is divided into two-way, is connected all the way by the 7th electric capacity with the 5th pin, another way is led to
The 6th electric capacity is crossed to be connected with the 6th pin, the 7th electric capacity, the 6th electric capacity input between be connected with the 11st electricity
Resistance, is in series with the 6th resistance, the 7th resistance between the 6th pin, the 7th pin, the 5th pin and the 16th resistance, the
It is grounded after 19 resistant series；The first toggle switch unit is also associated between 6th pin, the 7th pin.
3. vortex-shedding meter according to claim 2, it is characterised in that the bandpass filtering unit is put provided with the second computing
Big device, the 3rd operational amplifier, second operational amplifier are provided with the 1st pin, the 2nd pin and the 8th pin, and the described 1st draws
Pin is Vout pins, the 2nd pin is IN- pins, the 3rd pin is IN+ pins, and the 8th pin is Vs+ pins；
3rd pin is connected by the tenth resistance with the 7th pin of the first operational amplifier, the 3rd pin and
It is grounded after nine electric capacity, the series connection of the 12nd electric capacity；2nd pin is connected by the 15th resistance with the 1st pin, and described
15 resistor coupled in parallel have the 15th electric capacity；With being grounded after the 5th capacitance connection, the 2nd pin is also associated with 8th pin
4th toggle switch unit.
4. vortex-shedding meter according to claim 3, it is characterised in that the 3rd operational amplifier draws provided with the 10th
Pin, the 11st pin, the 10th pin are IN- pins, and the 11st pin is Vout pins；
After 10th pin is connected with the 13rd resistance, the 12nd resistance, the 8th electric capacity C8, with second operational amplifier
The 1st pin connection；The 8th resistance, the 12nd resistance and institute are connected between 10th pin and the 11st pin
State the 13rd resistance common port be connected with the 9th resistance, amplitude limiter circuit after, be connected with the 11st pin；12nd electricity
Resistance, the common port of the 13rd resistance are connected with the second toggle switch unit, also connect between the 10th pin, the 11st pin
It is connected to the 3rd toggle switch unit.
5. vortex-shedding meter according to claim 4, it is characterised in that the signal processing unit is provided with data signal
Manage chip TMS320F28335.
6. the vortex-shedding meter according to claim 5 or 6, it is characterised in that the radio communication unit is provided with without line number
Pass chip CC1101.
7. vortex-shedding meter according to claim 4, it is characterised in that first operational amplifier, the second computing are put
Big device and the 3rd operational amplifier select SGM8532 chips.
8. vortex-shedding meter according to claim 7, it is characterised in that the first toggle switch unit, the second dial-up
Switch element and the 3rd toggle switch unit are equipped with 8 toggle switch, and the 4th toggle switch unit is provided with 4 toggle switch.
9. vortex-shedding meter according to claim 4, it is characterised in that the amplitude limiter circuit is by two a positive and a negative parallel connections
Diode composition, the model 1N4148 of the diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710878536.7A CN107525551A (en) | 2017-09-26 | 2017-09-26 | Vortex-shedding meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710878536.7A CN107525551A (en) | 2017-09-26 | 2017-09-26 | Vortex-shedding meter |
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| Publication Number | Publication Date |
|---|---|
| CN107525551A true CN107525551A (en) | 2017-12-29 |
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ID=60736276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710878536.7A Pending CN107525551A (en) | 2017-09-26 | 2017-09-26 | Vortex-shedding meter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113465688A (en) * | 2021-07-12 | 2021-10-01 | 西尼尔(南京)过程控制有限公司 | Anti-vibration probe of vortex shedding flowmeter |
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