CN110031685A - A kind of inductance measurement system and method for coil - Google Patents
A kind of inductance measurement system and method for coil Download PDFInfo
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- CN110031685A CN110031685A CN201910428564.8A CN201910428564A CN110031685A CN 110031685 A CN110031685 A CN 110031685A CN 201910428564 A CN201910428564 A CN 201910428564A CN 110031685 A CN110031685 A CN 110031685A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2611—Measuring inductance
Abstract
The embodiment of the present application provides a kind of inductance measurement system and method for coil, the inductance measurement system of coil, including excitation output circuit, induced voltage acquisition module and data processing module, motivating output circuit includes exciting signal source and transformer, and exciting signal source is input to through transformer by test coil；Induced voltage acquisition module is connect with by test coil, is input to data processing module for acquiring by the induced voltage signal of test coil, and by induced voltage signal；Data processing module, for being calculated according to induced voltage signal by the inductance value of test coil.A kind of inductance measurement system and method for coil of the embodiment of the present application, motivate output voltage stabilization, waveform is smooth undistorted, it is big to export electric current, interference noise is small, it can ensure that rear end Acquisition Circuit is more acurrate, steadily carries out data acquisition, it is thus possible to more convenient, accurately measure coil inductance.
Description
Technical field
This application involves inductance measurement technique fields, in particular to a kind of inductance measurement system and method for coil.
Background technique
In industrial application environment, exists and form large-scale driving mechanism, such driving mechanism using the form of coil windings
Coil usually formed by long cable coiling, such driving mechanism in use, needs the inductance of measuring coil
Can amount, be driven in place with such driving mechanism of determination.
Currently, the coil current of process is big when the inductance to coil measures, reach ampere grade, inductance measurement system
The excitation output voltage of system is often not sufficiently stable, and waveform easily distorts, and noise is big, results in the measurement part of inductance measurement system
Can not measure, or result in inductance measurement system measurement accuracy it is lower, greatly affected coil inductance measurement work
The development or progress of work.
Summary of the invention
A kind of inductance measurement system and method for being designed to provide coil of the embodiment of the present application, excitation output voltage are steady
Fixed, waveform is smooth undistorted, and output electric current is big, and interference noise is small, it can be ensured that rear end Acquisition Circuit is more acurrate, is steadily counted
According to acquisition, it is thus possible to more convenient, accurately measure coil inductance.
In a first aspect, the embodiment of the present application provides a kind of inductance measurement system of coil, including excitation output circuit, sense
Voltage acquisition module and data processing module are answered,
The excitation output circuit includes exciting signal source and transformer, and the exciting signal source is inputted through the transformer
To by test coil；
The induced voltage acquisition module is connect with described by test coil, for acquiring the induced voltage by test coil
Signal, and the induced voltage signal is input to the data processing module；
The data processing module, for the inductance by test coil to be calculated according to the induced voltage signal
Value.
During above-mentioned realization, the exciting signal source of output circuit is motivated to be input to through transformer by test coil, excitation
Signal source can be exported through transformer to be stablized, without clutter, glitch-free excitation output voltage；The acquisition of induced voltage acquisition module is tested
The induced voltage signal of coil, and induced voltage signal is input to data processing module；Data processing module is according to induced electricity
Pressure signal is calculated by the inductance value of test coil, a kind of inductance measurement system of coil of the embodiment of the present application, excitation output
Voltage stabilization, waveform is smooth undistorted, and output electric current is big, and interference noise is small, it can be ensured that rear end Acquisition Circuit is more acurrate, steadily
Carry out data acquisition, it is thus possible to which more convenient, accurately measure coil inductance can reduce determining coil windings form shape
At large-scale driving mechanism can drive difficulty in place.
Further, the inductance measurement system of the coil further includes driving voltage acquisition module, the excitation output electricity
Road further includes Hall sensor and relay,
The exciting signal source is input to described by survey line through the transformer, the Hall sensor and the relay
Circle；
The driving voltage acquisition module is connect with the Hall sensor of the excitation output circuit, described sharp for acquiring
The excitation output voltage signal of output circuit is encouraged, and the excitation output voltage signal is input to the data processing module；
The data processing module is connect with the relay, is also used to control institute according to the excitation output voltage signal
State relay.
During above-mentioned realization, exciting signal source is input to through transformer, Hall sensor and relay by test coil；
Driving voltage acquisition module is connect with the Hall sensor of excitation output circuit, the excitation output voltage of acquisition excitation output circuit
Signal, and excitation output voltage signal is input to data processing module；Data processing module is connect with relay, according to excitation
Output voltage signal controls relay, and the state of Hall sensor energy real-time monitoring excitation output electric current monitors the electric current of process
The magnetic field size of generation, is converted to voltage signal for magnetic signal, convenient for driving voltage acquisition module acquisition excitation output voltage letter
Number；Relay is for controlling whether excitation output voltage exports, i.e., on-off action, the setting of relay can be convenient for excitation output electricity
Road output control.
Further, the excitation output circuit further includes fuse,
The exciting signal source is successively input to through the fuse and the transformer described by test coil.
During above-mentioned realization, exciting signal source is successively input to through fuse and transformer by test coil, fuse
For short-circuit protection, there is the situation of overcurrent or short circuit in exciting signal source, fuse can fuse automatically, become to reach protection
Depressor and the effect for motivating output circuit.
Further, it is described by test coil be single group coil or multiple groups coil,
It is described by test coil be single group coil when, the induced voltage acquisition module be one；
It is described by test coil be multiple groups coil when, the induced voltage acquisition module be it is multiple, the induced voltage is adopted
The quantity for collecting module is consistent with the group number of multiple groups coil；
The induced voltage acquisition module includes partial pressure unit, gain control unit, active power filtering unit, analog-digital converter
And first signal isolator,
The partial pressure unit is connect with the coil of any group of coil by test coil；
The partial pressure unit, the gain control unit, the active power filtering unit, the analog-digital converter and described
One signal isolator is sequentially connected；
First signal isolator is connect with the data processing module, the induced voltage signal is input to described
Data processing module.
It can be single group coil or multiple groups coil, the number of induced voltage acquisition module by test coil during above-mentioned realization
It measures consistent with by the group number of test coil；Partial pressure unit is connect with by the coil of any group of coil of test coil；Partial pressure unit, gain
Control unit, active power filtering unit, analog-digital converter and the first signal isolator are sequentially connected；First signal isolator and data
Processing module connection, is input to data processing module for induced voltage signal, partial pressure unit can improve induced voltage acquisition module
Safety, and improve the acquisition range of induced voltage；Gain control unit can improve voltage signal, improve circuit resistance
Anti- matching degree；Active power filtering unit can filter out interference, noise signal, improve the precision and stability of collection voltages；Modulus turns
Parallel operation is for converting analog signals into digital signal；Transmission of first signal isolator for digital signal is isolated, and letter is reduced
Crosstalk between number, the specific setting of induced voltage acquisition module go forward side by side one further convenient for the acquisition to induced voltage signal
The stability and precision for improving to step the induced voltage signal of acquisition, reduce the noise of the induced voltage signal of acquisition, mention
The high anti-interference ability of induced voltage acquisition module.
Further, the driving voltage acquisition module includes signal amplification unit, gain control unit, active power filtering list
Member, analog-digital converter and second signal isolator,
The signal amplification unit is connect with the Hall sensor of the excitation output circuit；
The signal amplification unit, the gain control unit, the active power filtering unit, the analog-digital converter and institute
Second signal isolator is stated to be sequentially connected；
The second signal isolator is connect with the data processing module, and the excitation output voltage signal is input to
The data processing module.
During above-mentioned realization, signal amplification unit is connect with the Hall sensor of excitation output circuit；Signal amplification
Unit, gain control unit, active power filtering unit, analog-digital converter and second signal isolator are sequentially connected；Second signal every
It is connect from device with data processing module, excitation output voltage signal is input to data processing module, signal amplification unit can incite somebody to action
Excitation output voltage signal amplifies, and is at suitable voltage acquisition section；Gain control unit can be to voltage signal
It is improved, improves circuit impedance matching degree；Active power filtering unit can filter out interference, noise signal, improve collection voltages
Precision and stability；Analog-digital converter is for converting analog signals into digital signal；Second signal isolator is for number letter
Number transmission isolation, reduce signal between crosstalk, driving voltage acquisition module it is specific setting further convenient for excitation it is defeated
The acquisition of voltage signal out, and the stability and precision of the excitation output voltage signal of acquisition are further increased, it reduces
The noise of the excitation output voltage signal of acquisition, improves the anti-interference ability of driving voltage acquisition module.
Further, the gain control unit include operational amplifier U1, operational amplifier U2, resistance R3, resistance R4,
Operational amplifier U3, resistance R5 and resistance R6,
The first input end of the first input end of the operational amplifier U1 and the operational amplifier U2 are as the increasing
The input terminal of beneficial control unit；
The second input terminal of the operational amplifier U1 connects the output end of the operational amplifier U1, the operation amplifier
The output end of device U1 is also connected with the first end of the resistance R3；
The second input terminal of the operational amplifier U2 connects the output end of the operational amplifier U2, the operation amplifier
The output end of device U2 is also connected with the first end of the resistance R4；
The second end of the resistance R4 connects the first input end of the operational amplifier U3, the second end of the resistance R3
Connect the second input terminal of the operational amplifier U3；The second end of the resistance R4 is also connected with the first end of the resistance R5,
The second end of the resistance R3 is also connected with the first end of the resistance R6；
The second end of the resistance R5 is grounded, and the second end of the resistance R6 connects the output of the operational amplifier U3
End, output end of the output end of the operational amplifier U3 as the gain control unit.
During above-mentioned realization, the specific setting of gain control unit can preferably be improved voltage signal, be mentioned
High circuit impedance matching degree.
Further, the active power filtering unit includes resistance R7, operational amplifier U4 and capacitor C1,
Input terminal of the first end of the resistance R7 as the active power filtering unit；
The second end of the resistance R7 connects the first input end of the operational amplifier U4, the operational amplifier U4's
Second input terminal connects the output end of the operational amplifier U4, and the output end of the operational amplifier U4 is as the active filter
The output end of wave unit；
The first end of the capacitor C1 connects the second end of the resistance R7, the second end ground connection of the capacitor C1.
During above-mentioned realization, the specific setting of active power filtering unit can preferably filter out interference, noise signal, improve
The precision and stability of collection voltages.
Further, the partial pressure unit includes resistance R1 and resistance R2,
Input terminal of the first end of the resistance R1 as the partial pressure unit, described in the second end of the resistance R1 is used as
The output end of partial pressure unit；
The first end of the resistance R2 connects the second end of the resistance R1, and the second end of the resistance R2 is as described point
Press the input terminal of unit, and output end of the second end of the resistance R2 as partial pressure unit.
During above-mentioned realization, the specific setting of partial pressure unit can preferably improve the safety of induced voltage acquisition module
Property, and improve the acquisition range of induced voltage.
Further, the signal amplification unit includes resistance R8, resistance R9, operational amplifier U5, resistance R10, resistance
R11 and capacitor C2,
Input terminal of the first end of the resistance R8 as the signal amplification unit, the second end connection of the resistance R8
The second input terminal of the operational amplifier U5；
The first end of the resistance R9 connects the first input end of the operational amplifier U5, the second end of the resistance R9
Ground connection, output end of the output end of the operational amplifier U5 as the signal amplification unit；
The first end of the resistance R10 connects the first end of the resistance R9, and the second end connection of the resistance R10 is constant
Voltage；
The first end of the resistance R11 connects the second end of the resistance R8, described in the second end connection of the resistance R11
The output end of operational amplifier U5；
The first end of the capacitor C2 connects the second end of the resistance R8, and the second end of the capacitor C2 connects the fortune
Calculate the output end of amplifier U5.
During above-mentioned realization, the specific setting of signal amplification unit can preferably be carried out excitation output voltage signal
Amplification, is at suitable voltage acquisition section.
Second aspect, the embodiment of the present application provide a kind of inductance measurement method of coil, the inductance based on aforementioned coil
Measuring system, which comprises
The exciting signal source of the excitation output circuit is input to described by test coil through transformer；
The induced voltage acquisition module acquires the induced voltage signal by test coil, and the induced voltage is believed
Number it is input to data processing module；
The inductance value by test coil is calculated according to the induced voltage signal in the data processing module.
During above-mentioned realization, motivate the exciting signal source of output circuit through transformer output drive output voltage, and
Excitation output voltage is input to by test coil, exciting signal source can be exported through transformer to be stablized, without clutter, glitch-free excitation
Output voltage；The acquisition of induced voltage acquisition module is input to number by the induced voltage signal of test coil, and by induced voltage signal
According to processing module；Data processing module is calculated according to induced voltage signal by the inductance value of test coil, the embodiment of the present application
A kind of coil inductance measurement method, motivate output voltage stabilization, waveform is smooth undistorted, output electric current it is big, interference noise
It is small, it can be ensured that rear end Acquisition Circuit is more acurrate, steadily carries out data acquisition, it is thus possible to more convenient, accurately measure
The inductance of coil, can reduce the large-scale driving mechanism that determining coil windings form is formed drive difficulty in place.
Detailed description of the invention
Technical solution in ord to more clearly illustrate embodiments of the present application will make below to required in the embodiment of the present application
Attached drawing is briefly described, it should be understood that the following drawings illustrates only some embodiments of the application, therefore should not be seen
Work is the restriction to range, for those of ordinary skill in the art, without creative efforts, can be with
Other relevant attached drawings are obtained according to these attached drawings.
Fig. 1 is a kind of schematic block diagram of the inductance measurement system for coil that the embodiment of the present application one provides；
Fig. 2 is a kind of structural schematic diagram of the inductance measurement system for coil that the embodiment of the present application one provides；
Fig. 3 is a kind of concrete structure schematic diagram of the inductance measurement system for coil that the embodiment of the present application one provides；
Fig. 4 is a kind of flow chart of the inductance measurement method for coil that the embodiment of the present application two provides.
Icon: 10- motivates output circuit；11- exciting signal source；12- transformer；13- Hall sensor；14- fuse；
15- relay；20- is by test coil；31- induced voltage acquisition module；32- driving voltage acquisition module；301- partial pressure unit；
302- gain control unit；303- active power filtering unit；304- signal amplification unit；305- analog-digital converter；306- first believes
Number isolator；307- second signal isolator；40- data processing module.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application is described.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.Meanwhile the application's
In description, term " first ", " second " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.
For the problems of the prior art, this application provides a kind of inductance measurement system and methods of coil, motivate defeated
Voltage stabilization out, waveform is smooth undistorted, and output electric current is big, and interference noise is small, it can be ensured that rear end Acquisition Circuit is more acurrate, stablizes
Ground carries out data acquisition, it is thus possible to more convenient, accurately measure coil inductance.
Embodiment one
Referring to Fig. 1, Fig. 1 is a kind of schematic block diagram of the inductance measurement system of coil of the embodiment of the present application.
A kind of inductance measurement system of coil of the embodiment of the present application, including excitation output circuit 10, induced voltage acquisition
Module 31 and data processing module 40,
Motivating output circuit 10 includes exciting signal source 11 and transformer 12, and exciting signal source 11 is input to through transformer 12
By test coil；
Induced voltage acquisition module 31 is connect with by test coil, for acquiring by the induced voltage signal of test coil, and will
Induced voltage signal is input to data processing module 40；
Data processing module 40, for being calculated according to induced voltage signal by the inductance value of test coil.
Optionally, exciting signal source 11 is the alternating voltage of 220V, 50Hz.
In the present embodiment, the present embodiment using exciting signal source 11 for 220V, 50Hz alternating voltage as example come into
The corresponding explanation of row.
In the present embodiment, exciting signal source 11 be 220V, 50Hz alternating voltage through transformer 12 be converted to 12V,
The alternating voltage of 50Hz.
Transformer 12 realizes the function of decompression by coil ratio, meanwhile, transformer 12 is mainly by coil and magnetic core
It constitutes, technology is more mature, and stable state output, no clutter and interference can be presented in excitation output voltage, and motivates output voltage
Waveform state and 11 input waveform state of exciting signal source are almost consistent, and output waveform is undistorted, have ensured that the waveform of output loses
Really spend lower, reliability is higher, also, transformer 12 is able to achieve electrical isolation, the interference noise of the alternating voltage of 220V, 50Hz
And DC component can be effectively suppressed, and reduce influence of the noise of the alternating voltage of 220V, 50Hz to excitation output voltage.
A kind of inductance measurement system of coil of the embodiment of the present application motivates the exciting signal source 11 of output circuit 10 through becoming
Depressor 12 is input to by test coil, and exciting signal source 11 can be exported through transformer 12 to be stablized, exports without clutter, glitch-free excitation
Voltage；The acquisition of induced voltage acquisition module 31 is input to data by the induced voltage signal of test coil, and by induced voltage signal
Processing module 40；Data processing module 40 is calculated according to induced voltage signal by the inductance value of test coil, and the application is implemented
A kind of inductance measurement system of coil of example motivates output voltage stabilization, and waveform is smooth undistorted, and output electric current is big, and interference is made an uproar
Sound is small, it can be ensured that rear end Acquisition Circuit is more acurrate, steadily carries out data acquisition, it is thus possible to more convenient, accurately measure
The inductance of coil out, can reduce the large-scale driving mechanism that determining coil windings form is formed drive difficulty in place.
Referring to Fig. 1 and Fig. 2, wherein Fig. 2 is a kind of structural representation of the inductance measurement system of coil of the embodiment of the present application
Figure.
In the present embodiment, the inductance measurement system of coil further includes driving voltage acquisition module 32, motivates output circuit
10 further include Hall sensor 13 and relay 15,
Exciting signal source 11 is input to through transformer 12, Hall sensor 13 and relay 15 by test coil；
Driving voltage acquisition module 32 is connect with the Hall sensor 13 of excitation output circuit 10, for acquiring excitation output
The excitation output voltage signal of circuit 10, and excitation output voltage signal is input to data processing module 40；
Data processing module 40 is connect with relay 15, is also used to according to excitation output voltage signal control relay 15.
During above-mentioned realization, the state of 13 energy real-time monitoring excitation output electric current of Hall sensor monitors process
The magnetic field size that electric current generates, is converted to voltage signal for magnetic signal, convenient for the acquisition excitation output of driving voltage acquisition module 32
Voltage signal；For controlling whether excitation output voltage exports, i.e. on-off action, the setting of relay 15 can be convenient for relay 15
Motivate the output control of output circuit 10.
Further, referring to Fig. 1 and Fig. 2, in the present embodiment, excitation output circuit 10 further includes fuse 14,
Exciting signal source 11 is successively input to through fuse 14 and transformer 12 by test coil.
During above-mentioned realization, fuse 14 be used for short-circuit protection, exciting signal source 11 occur overcurrent or short circuit
Situation, fuse 14 can fuse automatically, to have the function that protect transformer 12 and motivate output circuit 10.
Referring to Fig. 1 and Fig. 2, in the present embodiment, by test coil be single group coil or multiple groups coil,
When being single group coil by test coil, induced voltage acquisition module 31 is one；
By test coil be multiple groups coil when, induced voltage acquisition module 31 be it is multiple, induced voltage acquisition module 31
Quantity is consistent with the group number of multiple groups coil；
Induced voltage acquisition module 31 includes partial pressure unit 301, gain control unit 302, active power filtering unit 303, mould
Number converter 305 and the first signal isolator 306,
Partial pressure unit 301 is connect with by the coil of any group of coil of test coil；
Partial pressure unit 301, gain control unit 302, active power filtering unit 303, analog-digital converter 305 and the first signal every
It is sequentially connected from device 306；
First signal isolator 306 is connect with data processing module 40, and induced voltage signal is input to data processing mould
Block 40.
During above-mentioned realization, partial pressure unit 301 can improve the safety of induced voltage acquisition module 31, and improve sense
Answer the acquisition range of voltage；Gain control unit 302 can improve voltage signal, improve circuit impedance matching degree；Have
Source filter unit 303 can filter out interference, noise signal, improve the precision and stability of collection voltages；Analog-digital converter 305 is used for
Convert analog signals into digital signal；Transmission of first signal isolator 306 for digital signal is isolated, between reduction signal
The acquisition to induced voltage signal is further convenient in crosstalk, the specific setting of induced voltage acquisition module 31, and further
The stability and precision for improving the induced voltage signal of acquisition, reduce the noise of the induced voltage signal of acquisition, improve
The anti-interference ability of induced voltage acquisition module 31.
It should be noted that in other embodiments, induced voltage acquisition module 31 can also be other structures, here,
The other structures of induced voltage acquisition module 31 are not enumerated, as long as the induced voltage acquisition module 31 of other structures can answer
A kind of inductance measurement system of coil for the embodiment of the present application realizes the acquisition to induced voltage.
Optionally, in the present embodiment, there is magnetic core among test coil.When magnetic core changes, by the electricity of test coil
Inductance value will also change.
Further, referring to fig. 2, in the present embodiment, driving voltage acquisition module 32 include signal amplification unit 304,
Gain control unit 302, active power filtering unit 303, analog-digital converter 305 and second signal isolator 307,
Signal amplification unit 304 is connect with the Hall sensor 13 of excitation output circuit 10；
Signal amplification unit 304, gain control unit 302, active power filtering unit 303, analog-digital converter 305 and the second letter
Number isolator 307 is sequentially connected；
Second signal isolator 307 is connect with data processing module 40, and excitation output voltage signal is input at data
Manage module 40.
During above-mentioned realization, signal amplification unit 304 can amplify excitation output voltage signal, be at
Suitable voltage acquisition section；Gain control unit 302 can improve voltage signal, improve circuit impedance matching degree；
Active power filtering unit 303 can filter out interference, noise signal, improve the precision and stability of collection voltages；Analog-digital converter 305 is used
In converting analog signals into digital signal；Transmission of the second signal isolator 307 for digital signal is isolated, between reduction signal
Crosstalk, the specific setting of driving voltage acquisition module 32 goes forward side by side further convenient for the acquisition to excitation output voltage signal
The stability and precision for improving to one step the excitation output voltage signal of acquisition, reduce the excitation output voltage signal of acquisition
Noise, improve the anti-interference ability of driving voltage acquisition module 32.
It should be noted that in other embodiments, driving voltage acquisition module 32 can also be other structures, here,
The other structures of driving voltage acquisition module 32 are not enumerated, as long as the driving voltage acquisition module 32 of other structures can answer
A kind of inductance measurement system of coil for the embodiment of the present application realizes the acquisition to excitation output voltage.
Further, referring to figs. 2 and 3, wherein Fig. 3 is a kind of inductance measurement system of coil of the embodiment of the present application
Concrete structure schematic diagram.
In the present embodiment, partial pressure unit 301 includes resistance R1 and resistance R2,
The first end of input terminal of the first end of resistance R1 as partial pressure unit 301, resistance R1 is connected by test coil 20
The coil of any group of coil；
Output end of the second end of resistance R1 as partial pressure unit 301, the second end connection induced voltage acquisition of resistance R1
The input terminal of the gain control unit 302 of module 31；
The second end of the first end connection resistance R1 of resistance R2, the second end of resistance R2 are connected by same group of test coil 20
The second end of the coil of coil, and output end of the second end of resistance R2 as partial pressure unit 301, resistance R2 connects induced voltage
The input terminal of the gain control unit 302 of acquisition module 31.
During above-mentioned realization, the specific setting of partial pressure unit 301 can preferably improve induced voltage acquisition module 31
Safety and improve induced voltage acquisition range.
It should be noted that in other embodiments, partial pressure unit 301 can also be other structures, here, not to partial pressure
The other structures of unit 301 are enumerated, as long as the partial pressure unit 301 of other structures can apply to one kind of the embodiment of the present application
The inductance measurement system of coil.
Referring to figs. 2 and 3, in the present embodiment, gain control unit 302 includes operational amplifier U1, operational amplifier
U2, resistance R3, resistance R4, operational amplifier U3, resistance R5 and resistance R6,
The first input end of operational amplifier U1 and the first input end of operational amplifier U2 are as gain control unit 302
Input terminal；
The output end of the second input terminal connection operational amplifier U1 of operational amplifier U1, the output end of operational amplifier U1
It is also connected with the first end of resistance R3；
The output end of the second input terminal connection operational amplifier U2 of operational amplifier U2, the output end of operational amplifier U2
It is also connected with the first end of resistance R4；
The first input end of the second end connection operational amplifier U3 of resistance R4, the second end of resistance R3 connect operation amplifier
The second input terminal of device U3；The second end of resistance R4 is also connected with the first end of resistance R5, and the second end of resistance R3 is also connected with resistance
The first end of R6；
The second end of resistance R5 is grounded, the output end of the second end connection operational amplifier U3 of resistance R6, operational amplifier
Output end of the output end of U3 as gain control unit 302.
In induced voltage acquisition module 31, the first of the first input end of operational amplifier U1 and operational amplifier U2 is defeated
Enter the output end of end connection partial pressure unit 301, that is, the second end of the first input end connection resistance R1 of operational amplifier U1, fortune
Calculate the second end of the first input end connection resistance R2 of amplifier U2；The output end of operational amplifier U3 connects active filter unit
303 input terminal.
During above-mentioned realization, the specific setting of gain control unit 302 can preferably be improved voltage signal,
Improve circuit impedance matching degree.
It should be noted that in other embodiments, gain control unit 302 can also be other structures, here, not right
The other structures of gain control unit 302 are enumerated, as long as the gain control unit 302 of other structures can apply to the application
A kind of inductance measurement system of coil of embodiment.
Referring to figs. 2 and 3, in the present embodiment, active power filtering unit 303 includes resistance R7, operational amplifier U4 and electricity
Hold C1,
Input terminal of the first end of resistance R7 as active power filtering unit 303；
The first input end of the second end connection operational amplifier U4 of resistance R7, the second input terminal of operational amplifier U4 connect
Connect the output end of operational amplifier U4, output end of the output end of operational amplifier U4 as active power filtering unit 303；
The second end of the first end connection resistance R7 of capacitor C1, the second end ground connection of capacitor C1.
In induced voltage acquisition module 31, the output end of the first end connection gain control unit 302 of resistance R7, that is,
The output end of the first end connection operational amplifier U3 of resistance R7；The output end of operational amplifier U4 connects analog-digital converter 305.
During above-mentioned realization, the specific setting of active power filtering unit 303 can preferably filter out interference, noise signal,
Improve the precision and stability of collection voltages.
It should be noted that in other embodiments, active power filtering unit 303 can also be other structures, here, not right
The other structures of active power filtering unit 303 are enumerated, as long as the active power filtering unit 303 of other structures can apply to the application
A kind of inductance measurement system of coil of embodiment.
Referring to figs. 2 and 3, optionally, analog-digital converter 305 is integral analogue-to-digital converter；First signal isolator 306
For the signal isolator of loop power supply formula.
Referring to figs. 2 and 3, in the present embodiment, the signal amplification unit 304 of driving voltage acquisition module 32 includes resistance
R8, resistance R9, operational amplifier U5, resistance R10, resistance R11 and capacitor C2,
The second end of input terminal of the first end of resistance R8 as signal amplification unit 304, resistance R8 connects operation amplifier
The second input terminal of device U5；
The first input end of the first end connection operational amplifier U5 of resistance R9, the second end ground connection of resistance R9, operation are put
Output end of the output end of big device U5 as signal amplification unit 304；
The first end of the first end connection resistance R9 of resistance R10, the second end of resistance R10 connect constant voltage；
The second end of the first end connection resistance R8 of resistance R11, the second end connection operational amplifier U5's of resistance R11 is defeated
Outlet；
The second end of the first end connection resistance R8 of capacitor C2, the output of the second end connection operational amplifier U5 of capacitor C2
End.
In driving voltage acquisition module 32, the first end of resistance R8 connects Hall sensor 13；Operational amplifier U5's
The input terminal of output end connection gain control unit 302, that is, the of the output end connection operational amplifier U1 of operational amplifier U5
The first input end of one input terminal and operational amplifier U2.
During above-mentioned realization, the specific setting of signal amplification unit 304 will can preferably motivate output voltage signal
It amplifies, is at suitable voltage acquisition section.
It should be noted that in other embodiments, signal amplification unit 304 can also be other structures, here, not right
The other structures of signal amplification unit 304 are enumerated, as long as the signal amplification unit 304 of other structures can apply to the application
A kind of inductance measurement system of coil of embodiment.
Referring to figs. 2 and 3, in driving voltage acquisition module 32, the first end of resistance R7 connects gain control unit 302
Output end, that is, resistance R7 first end connection operational amplifier U3 output end；The output end of operational amplifier U4 connects mould
Number converter 305.
Optionally, second signal isolator 307 is the signal isolator of loop power supply formula.
Embodiment two
Referring to fig. 4, Fig. 4 is a kind of flow chart of the inductance measurement method of coil of the embodiment of the present application.
A kind of inductance measurement method of coil of the embodiment of the present application, the based on the above embodiment inductance of one a kind of coil
Measuring system, a kind of inductance measurement method of coil include the following steps:
Step S101 motivates the exciting signal source of output circuit to be input to through transformer by test coil.
Step S102, induced voltage acquisition module are acquired by the induced voltage signal of test coil, and by induced voltage signal
It is input to data processing module.
Step S103, data processing module are calculated according to induced voltage signal by the inductance value of test coil.
A kind of remaining content of the inductance measurement method of coil of the embodiment of the present application can suitably refer to above-described embodiment one
A kind of coil inductance measurement system content, here, no longer being repeated.
A kind of inductance measurement method of coil of the embodiment of the present application, motivates the exciting signal source of output circuit through transformer
Output drive output voltage, and excitation output voltage is input to by test coil, exciting signal source can be exported through transformer stablize,
Without clutter, glitch-free excitation output voltage；Induced voltage acquisition module is acquired by the induced voltage signal of test coil, and will sense
Voltage signal is answered to be input to data processing module；Data processing module is calculated according to induced voltage signal by the electricity of test coil
Inductance value, a kind of inductance measurement method of coil of the embodiment of the present application motivate output voltage stabilization, and waveform is smooth undistorted, defeated
Electric current is big out, and interference noise is small, it can be ensured that rear end Acquisition Circuit is more acurrate, steadily carries out data acquisition, it is thus possible to more
Convenient, accurately measure coil inductance, can reduce the large-scale driving mechanism that determining coil windings form is formed drive
Difficulty in place.
In several embodiments provided herein, it should be understood that disclosed device and method can also pass through
Other modes are realized.The apparatus embodiments described above are merely exemplary, for example, flow chart and block diagram in attached drawing
Show the device of multiple embodiments according to the application, the architectural framework in the cards of method and computer program product,
Function and operation.In this regard, each box in flowchart or block diagram can represent the one of a module, section or code
Part, a part of the module, section or code, which includes that one or more is for implementing the specified logical function, to be held
Row instruction.It should also be noted that function marked in the box can also be to be different from some implementations as replacement
The sequence marked in attached drawing occurs.For example, two continuous boxes can actually be basically executed in parallel, they are sometimes
It can execute in the opposite order, this depends on the function involved.It is also noted that every in block diagram and or flow chart
The combination of box in a box and block diagram and or flow chart can use the dedicated base for executing defined function or movement
It realizes, or can realize using a combination of dedicated hardware and computer instructions in the system of hardware.
In addition, each functional module in each embodiment of the application can integrate one independent portion of formation together
Point, it is also possible to modules individualism, an independent part can also be integrated to form with two or more modules.
It, can be with if the function is realized and when sold or used as an independent product in the form of software function module
It is stored in a computer readable storage medium.Based on this understanding, the technical solution of the application is substantially in other words
The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be a
People's computer, server or network equipment etc.) execute each embodiment the method for the application all or part of the steps.
And storage medium above-mentioned includes: that USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
The various media that can store program code such as reservoir (RAM, Random Access Memory), magnetic or disk.
The above description is only an example of the present application, the protection scope being not intended to limit this application, for ability
For the technical staff in domain, various changes and changes are possible in this application.Within the spirit and principles of this application, made
Any modification, equivalent substitution, improvement and etc. should be included within the scope of protection of this application.It should also be noted that similar label and
Letter indicates similar terms in following attached drawing, therefore, once it is defined in a certain Xiang Yi attached drawing, then in subsequent attached drawing
In do not need that it is further defined and explained.
The above, the only specific embodiment of the application, but the protection scope of the application is not limited thereto, it is any
Those familiar with the art within the technical scope of the present application, can easily think of the change or the replacement, and should all contain
Lid is within the scope of protection of this application.Therefore, the protection scope of the application shall be subject to the protection scope of the claim.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
Claims (10)
1. a kind of inductance measurement system of coil, which is characterized in that including excitation output circuit, induced voltage acquisition module and number
According to processing module,
The excitation output circuit includes exciting signal source and transformer, the exciting signal source through the transformer be input to by
Test coil；
The induced voltage acquisition module is connect with described by test coil, is believed for acquiring the induced voltage by test coil
Number, and the induced voltage signal is input to the data processing module；
The data processing module, for the inductance value by test coil to be calculated according to the induced voltage signal.
2. the inductance measurement system of coil according to claim 1, which is characterized in that the inductance measurement system of the coil
It further include driving voltage acquisition module, the excitation output circuit further includes Hall sensor and relay,
The exciting signal source is input to described by test coil through the transformer, the Hall sensor and the relay；
The driving voltage acquisition module is connect with the Hall sensor of the excitation output circuit, defeated for acquiring the excitation
The excitation output voltage signal of circuit out, and the excitation output voltage signal is input to the data processing module；
The data processing module is connect with the relay, be also used to be controlled according to the excitation output voltage signal it is described after
Electric appliance.
3. the inductance measurement system of coil according to claim 1, which is characterized in that the excitation output circuit further includes
Fuse,
The exciting signal source is successively input to through the fuse and the transformer described by test coil.
4. the inductance measurement system of coil according to claim 1, which is characterized in that it is described by test coil be single group coil
Or multiple groups coil,
It is described by test coil be single group coil when, the induced voltage acquisition module be one；
It is described by test coil be multiple groups coil when, the induced voltage acquisition module be it is multiple, the induced voltage acquires mould
The quantity of block is consistent with the group number of multiple groups coil；
The induced voltage acquisition module includes partial pressure unit, gain control unit, active power filtering unit, analog-digital converter and
One signal isolator,
The partial pressure unit is connect with the coil of any group of coil by test coil；
The partial pressure unit, the gain control unit, the active power filtering unit, the analog-digital converter and first letter
Number isolator is sequentially connected；
First signal isolator is connect with the data processing module, and the induced voltage signal is input to the data
Processing module.
5. the inductance measurement system of coil according to claim 2, which is characterized in that the driving voltage acquisition module packet
Signal amplification unit, gain control unit, active power filtering unit, analog-digital converter and second signal isolator are included,
The signal amplification unit is connect with the Hall sensor of the excitation output circuit；
The signal amplification unit, the gain control unit, the active power filtering unit, the analog-digital converter and described
Binary signal isolator is sequentially connected；
The second signal isolator is connect with the data processing module, the excitation output voltage signal is input to described
Data processing module.
6. the inductance measurement system of coil according to claim 4 or 5, which is characterized in that the gain control unit packet
Operational amplifier U1, operational amplifier U2, resistance R3, resistance R4, operational amplifier U3, resistance R5 and resistance R6 are included,
The first input end of the first input end of the operational amplifier U1 and the operational amplifier U2 are as the gain control
The input terminal of unit processed；
The second input terminal of the operational amplifier U1 connects the output end of the operational amplifier U1, the operational amplifier U1
Output end be also connected with the first end of the resistance R3；
The second input terminal of the operational amplifier U2 connects the output end of the operational amplifier U2, the operational amplifier U2
Output end be also connected with the first end of the resistance R4；
The second end of the resistance R4 connects the first input end of the operational amplifier U3, the second end connection of the resistance R3
The second input terminal of the operational amplifier U3；The second end of the resistance R4 is also connected with the first end of the resistance R5, described
The second end of resistance R3 is also connected with the first end of the resistance R6；
The second end of the resistance R5 is grounded, and the second end of the resistance R6 connects the output end of the operational amplifier U3, institute
State output end of the output end of operational amplifier U3 as the gain control unit.
7. the inductance measurement system of coil according to claim 4 or 5, which is characterized in that the active power filtering unit packet
Resistance R7, operational amplifier U4 and capacitor C1 are included,
Input terminal of the first end of the resistance R7 as the active power filtering unit；
The second end of the resistance R7 connects the first input end of the operational amplifier U4, and the second of the operational amplifier U4
Input terminal connects the output end of the operational amplifier U4, and the output end of the operational amplifier U4 is as the active power filtering list
The output end of member；
The first end of the capacitor C1 connects the second end of the resistance R7, the second end ground connection of the capacitor C1.
8. the inductance measurement system of coil according to claim 4, which is characterized in that the partial pressure unit includes resistance R1
With resistance R2,
Input terminal of the first end of the resistance R1 as the partial pressure unit, the second end of the resistance R1 is as the partial pressure
The output end of unit；
The first end of the resistance R2 connects the second end of the resistance R1, and the second end of the resistance R2 is single as the partial pressure
The input terminal of member, and output end of the second end of the resistance R2 as partial pressure unit.
9. the inductance measurement system of coil according to claim 5, which is characterized in that the signal amplification unit includes electricity
R8, resistance R9, operational amplifier U5, resistance R10, resistance R11 and capacitor C2 are hindered,
Input terminal of the first end of the resistance R8 as the signal amplification unit, the resistance R8 second end connection described in
The second input terminal of operational amplifier U5；
The first end of the resistance R9 connects the first input end of the operational amplifier U5, the second termination of the resistance R9
Ground, output end of the output end of the operational amplifier U5 as the signal amplification unit；
The first end of the resistance R10 connects the first end of the resistance R9, and the second end of the resistance R10 connects constant electricity
Pressure；
The first end of the resistance R11 connects the second end of the resistance R8, and the second end of the resistance R11 connects the operation
The output end of amplifier U5；
The first end of the capacitor C2 connects the second end of the resistance R8, and the second end of the capacitor C2 connects the operation and puts
The output end of big device U5.
10. a kind of inductance measurement method of coil, which is characterized in that the electricity based on the described in any item coils of claim 1-9
Sensed quantity system, which comprises
The exciting signal source of the excitation output circuit is input to described by test coil through transformer；
The induced voltage acquisition module acquires the induced voltage signal by test coil, and the induced voltage signal is defeated
Enter to data processing module；
The inductance value by test coil is calculated according to the induced voltage signal in the data processing module.
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| CN201910428564.8A CN110031685A (en) | 2019-05-22 | 2019-05-22 | A kind of inductance measurement system and method for coil |
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| CN201910428564.8A CN110031685A (en) | 2019-05-22 | 2019-05-22 | A kind of inductance measurement system and method for coil |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113138311A (en) * | 2021-04-01 | 2021-07-20 | 浙江方圆电气设备检测有限公司 | Method for measuring maximum inductance at power-off instant of high-voltage direct-current relay coil |
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