CN206020507U - Full-automatic stream based on FPGA and VCCS is than device high-tension bridge - Google Patents
Full-automatic stream based on FPGA and VCCS is than device high-tension bridge Download PDFInfo
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- CN206020507U CN206020507U CN201621024180.8U CN201621024180U CN206020507U CN 206020507 U CN206020507 U CN 206020507U CN 201621024180 U CN201621024180 U CN 201621024180U CN 206020507 U CN206020507 U CN 206020507U
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Abstract
The utility model provides a kind of full-automatic stream based on FPGA and VCCS than device high-tension bridge, the full-automatic stream includes divider, high voltage power supply, FPGA, the first analog input module, the second analog input module, RT, industrial computer, VCCS, analog output module, programmable amplifier, stream than device and test test product than device high-tension bridge, and stream includes detection coil, the first ratio coil and the second ratio coil than device.Detection coil is used for detection stream than device balanced degree with programmable amplifier；The ratio coil of two fixed numbers of turn is connected with test test product and VCCS respectively, the comparison expression measurement for realizing test product electric current by ampere-turn equilibrium principle.Full-automatic stream based on FPGA and VCCS of the present utility model can achieve the measurement of capicitive sample electric capacity and loss factor and the measurement of perceptual test product inductance and quality factor under condition of high voltage than device high-tension bridge.
Description
Technical field
The utility model is related to Electrical Measurement Technology, more particularly to a kind of based on FPGA and VCCS complete from
Dynamic stream is than device high-tension bridge.
Background technology
Under high voltage condition, the measurement of capicitive sample capacitance and loss factor mostly adopts bridge measurement, mainly
Equipment has high-pressure resistant bridge and high-pressure spray than device electric bridge.
High-pressure resistant bridge is a kind of most traditional capicitive sample capacitance and loss factor measuring apparatus, and its operation principle is such as
Shown in Figure 1A.Specifically testing, test product is equivalent to be compared into complex impedance with standard capacitor, adjusts low-pressure side ratio
Measuring resistance R3 of arm and electric capacity C4 meet opposite side impedance product equal realize bridge balance, then according to bridge balance condition meter
Calculate parameter capacitance to be measured and loss factor.The regulation of low-voltage arm resistance and electric capacity is switched by the rotary decimal system and is realized,
Manual adjustment can only be passed through, it is impossible to realize automatic measurement.Simultaneously because Schering bridge is RC bridge, can only realize that capacitive is tried
The measurement of product, it is impossible to meet the measurement of perceptual test product.
Than device electric bridge, its equilibrium condition is ampere-turn equilibrium to high-pressure spray, because replacing resistance ratio with turn ratio, does not have during balance
There is magnetic hystersis loss, its certainty of measurement increases significantly compared with other electric bridges, operation principle is as shown in Figure 1B.The equilibrium condition of electric bridge
For：ICNX=I0N0, IgNX=IaNa.According to turn ratio can try to achieve test test product electric current, so as to obtain its capacitance and loss because
Number.Change the direction of magnetic flux in coil Nx, test test product electric current is flowed into from coil Nx Same Name of Ends, can achieve the survey of perception test product
Amount.High-pressure spray is by 1,2,5 coefficient taps by ratio coil than the balance method of device electric bridge, adjusts the circle of ratio coil manually
Number, realizes ampere-turn equilibrium.This regulative mode is cumbersome, and the skill set requirements to operator are higher；And line is complicated, lead
Shielding and integrity problem can not be ignored.
Problem in order to overcome bridge method manually to operate and to operating personnel's technical requirements, there has been proposed phase bit comparison
Method.Phase-comparison method is a kind of method of all automatic measurement capicitive sample capacitance and loss factor under condition of high voltage, and which is basic
Principle is as shown in Figure 1 C.Voltage and current signal pre-processes circuit through identical two paths of signals, subsequently into zero-crossing comparator
AC signal zero crossing is shaped as square-wave signal, by comparing the time between the rising edge or trailing edge of the two square-wave signals
Difference obtains the phase difference of two signals, and then calculates test test product capacitance and loss factor.The method achieves automation
Measurement, but for the voltage signal and current signal that extract belong to direct measurement, there is no the benchmark for determining, certainty of measurement ten
Divide limited.
To sum up, either existing bridge method, or phase-comparison method, or its precision is relatively low, or need artificial behaviour
Make and higher to operating personnel's technical requirements, can not realize high-acruracy survey and automatic measurement simultaneously.
Utility model content
It has been given below with regard to brief overview of the present utility model, to provide with regard to some sides of the present utility model
The basic comprehension in face.It should be appreciated that this general introduction is not with regard to exhaustive general introduction of the present utility model.It is not intended to really
Fixed crucial or pith of the present utility model, nor intended limitation scope of the present utility model.Its purpose is only with letter
The form of change provides some concepts, in this, as the preamble in greater detail that discusses after a while.
In consideration of it, the utility model provides a kind of full-automatic stream based on FPGA and VCCS than device high pressure
Electric bridge, can not be while realize high-acruracy survey and automatic measurement at least to solve existing bridge method and phase-comparison method
Problem.
According to one side of the present utility model, there is provided a kind of based on FPGA and the full-automatic stream of VCCS
Than device high-tension bridge, the full-automatic stream includes divider, high voltage power supply, field programmable gate array than device high-tension bridge
(FPGA), the first analog input module, the second analog input module, real-time controller (RT), industrial computer, voltage control electric current
Source, analog output module, programmable amplifier, detection coil, stream than device and test test product, wherein, flow than device include detection coil,
First ratio coil and the second ratio coil；The high pressure of high voltage power supply is added separately on divider and test test product, wherein, test
The electric current of test product is entered in the second ratio coil；During the voltage signal that divider is obtained is input into the first analog input module, the
The data-in port that the voltage signal is converted from analog into after data signal transmitting to FPGA by one analog input module
In；Detection coil connects programmable amplifier, and the unbalanced signal that detection coil is collected by programmable amplifier amplifies, by second
The amplification signal that detection coil is obtained by analog input module is converted to data signal and transmits to FPGA；The output end of FPGA connects
Analog output module is connect, VCCS gathers the voltage signal of analog output module, and the voltage signal is converted to
Current signal and export to the first ratio coil；The multiplication factor that the digital I/O ports of FPGA are connected to programmable amplifier connects
Line end；FPGA is connected with RT, and RT is connected by Ethernet with industrial computer.
Further, standard capacitance model in parallel with a resistor can be provided with FPGA.
Further, standard inductance model in parallel with a resistor can be provided with FPGA.
Further, detection coil is used for detection stream than device balanced degree with programmable amplifier, and FPGA is used for according to inspection
The output voltage size of test coil makes its digital I/O port send two-way level signal, and controls journey by two-way level signal
Control amplifier selects corresponding multiplication factor.
Cardinal principle of the present utility model is：Obtain from the experimental voltage analog signal of divider acquisition and from programmable amplifier
The stream for taking converts digital data transmission to FPGA than device unbalance voltage signal by the first and second analog input modules.Numeral
Voltage signal generates compensation digital voltage signal by the model calculation for building, as VCCS after digital-to-analogue conversion
Input, VCCS output compensation electric current.Compensation electric current flows into magnetic flux and the test examination that the first ratio coil is produced
The magnetic flux that product electric current is produced in the second ratio coil is offseted.FPGA, the first and second analog input modules and voltage control
Current source processed is equivalent to virtual reference, adjusts electric capacity (or inductance), electricity according to stream than device out-of-balance current situation by industrial computer
The parameter of resistance, realizes and material standard electric capacity (or standard inductance) and measuring resistance action effect identical compensating current signal.
Through repeatedly compensation, stream is more less and less than device unbalanced signal, finally realizes ampere-turn equilibrium.By the circuit in FPGA during balance
Parameter can try to achieve the electric current for flowing through test test product, and then obtain the capacitance and loss factor of test test product.
Compared with prior art, a kind of full-automatic stream based on FPGA and VCCS of the present utility model compares device
High-tension bridge has the advantages that：
(1) realize by way of using controllable compensating electric current flow than device high-tension bridge ampere-turn equilibrium, detection coil with
Programmable amplifier is used for detection stream than device balanced degree, the ratio coil of two fixed numbers of turn respectively with test test product and voltage control
Current source processed is connected, and adjusts the output current of VCCS, the ratio for realizing test product electric current by ampere-turn equilibrium principle
Measure compared with formula, thus can either ensure high-acruracy survey under high voltage condition, the full-automation of test process can be realized again,
Simple to operate, compensate for the deficiency of existing measuring technology.
(2) stream of the present utility model replaces tradition windows operating systems than device high-tension bridge by adopting FPGA, can
The following process of parallel processing in real time：Signal is gathered, compensating current signal is calculated and is sent signal；And this is traditional
Windows operating systems cannot be realized.Specifically, the utility model is in collection power supply voltage signal and out-of-balance current letter
Number while send compensating current signal, and the size of compensating current signal is by supply voltage combined circuit parameter real-time operation
Get, this is two processes of real parallel running, it is desirable to which control system has high real-time and certainty, and windows is operated
System is due to can not two programs of real-time parallel completely the characteristics of its single thread is run, it is impossible to meet test request.Additionally, can
It is the digit chip for having substantial amounts of gate to constitute to reconfigure FPGA, and which can be customized, after customization gate just by
It has been compiled on physical hardware, unless recompilate will not otherwise change, so FPGA has high reliability, height deterministic excellent
Point.FPGA will not be processed the restriction of device check figure within hardware with the execution parallel codes of parallel endless form simultaneously, can
Realize real real-time parallel operation.
(3) stream of the present utility model remains ampere-turn equilibrium than the general principle of device high-tension bridge, that is, flow inflow ratio device ratio
Example coil is regulatable current signal, but due to replacing tradition windows operating systems using FPGA, and what FPGA sent
Data signal is changed into voltage signal through analog output module, therefore realizes voltage/current using VCCS here
Signal is converted.Ensure that VCCS has the conversion coefficient k of determination in design, to send digital voltage certain as FPGA
When, compensating the amplitude of electric current, phase place and also determine, the change of detection coil out-of-balance current after being compensated by observation, through computing
Adjust FPGA output voltages next time.
(4) stream of the present utility model can not only realize capicitive sample electric capacity and damage under condition of high voltage than device high-tension bridge
The all automatic measurement of consumption factor, moreover it is possible to realize all automatic measurement of perceptual test product inductance and quality factor；With existing high-pressure spray ratio
Device electric bridge is compared, and the utility model is without the need for excessive line, it is to avoid the problem of many reliabilities that brings with lead and shielding.
By the detailed description below in conjunction with accompanying drawing to most preferred embodiment of the present utility model, of the present utility model these with
And other advantages will be apparent from.
Description of the drawings
The utility model can be by reference to being better understood below in association with the description given by accompanying drawing, wherein
Same or like part is represented using same or analogous reference in all of the figs.The accompanying drawing is together with
The detailed description in face includes in this manual together and forms the part of this specification, and is used for further illustrating
Bright preferred embodiment of the present utility model and explanation principle and advantage of the present utility model.In the accompanying drawings：
Figure 1A is the schematic diagram of accurate Schering bridge；
Figure 1B is schematic diagram of the general high voltage stream than device electric bridge；
Fig. 1 C are the circuit block diagram of phase-comparison method measurement；
Fig. 2 is one of the full-automatic stream based on FPGA and VCCS of the present utility model than device high-tension bridge
The circuit theory diagrams of example, wherein：
1- divider, 2- high voltage power supplies, the first analog input module of 3-FPGA, 4-1-, the second analog input modules of 4-2-,
5- real-time controllers (RT), 6- industrial computers, 7- VCCSs, 8- analog output modules, 9- programmable amplifiers, 10- streams
Than device, 10-1- detection coils, 10-2- the first ratio coils, 10-3- the second ratio coils, 11- test test products.
It will be appreciated by those skilled in the art that element in accompanying drawing is just for the sake of illustrating for the sake of simple and clear,
And be not necessarily drawn to scale.For example, in accompanying drawing, the size of some elements may be exaggerated relative to other elements, with
Just the understanding to the utility model embodiment is favorably improved.
Specific embodiment
One exemplary embodiment of the present utility model is described hereinafter in connection with accompanying drawing.Rise for clarity and conciseness
See, do not describe all features of actual embodiment in the description.It should be understood, however, that developing any this reality
A lot of decisions specific to embodiment must be made during embodiment, to realize the objectives of developer, example
Such as, meet those related to system and business restrictive condition, and these restrictive conditions may be with embodiment not
Change together.Additionally, it also should be appreciated that, although development is likely to be extremely complex and time-consuming, but to having benefited from
For those skilled in the art of present disclosure, this development is only routine task.
Here, in addition it is also necessary to which explanation is a bit, in order to avoid having obscured the utility model because of unnecessary details, attached
Illustrate only in figure with according to the closely related apparatus structure of scheme of the present utility model and/or process step, and eliminate
The other details little with the utility model relation.
It is higher than device that embodiment of the present utility model provides a kind of full-automatic stream based on FPGA and VCCS
Piezoelectricity bridge, the full-automatic stream include divider, high voltage power supply, FPGA, the first analog input module, the second mould than device high-tension bridge
Intend input module, RT, industrial computer, VCCS, analog output module, programmable amplifier, stream than device and test test product,
Wherein, stream includes detection coil, the first ratio coil and the second ratio coil than device；The high pressure of high voltage power supply is added separately to partial pressure
On device and test test product, wherein, the electric current for testing test product is entered in the second ratio coil；The voltage signal input that divider is obtained
Into the first analog input module, the voltage signal is converted from analog into passing after data signal by the first analog input module
Transport in the data-in port of FPGA；Detection coil connects programmable amplifier, and detection coil is collected by programmable amplifier
Unbalanced signal amplifies, and the amplification signal obtained detection coil by the second analog input module is converted to data signal and is passed
Transport to FPGA；The output end connection analog output module of FPGA, the voltage letter of VCCS collection analog output module
Number, and in the voltage signal being converted to current signal and being exported to the first ratio coil；The digital I/O ports of FPGA are connected to
The multiplication factor terminals of programmable amplifier；FPGA is connected with RT, and RT is connected by Ethernet with industrial computer.
Describe with reference to Fig. 2 of the present utility model a kind of based on FPGA and the full-automatic stream ratio of VCCS
One example of device high-tension bridge.As shown in Fig. 2 full-automatic stream of the present utility model includes divider 1, high than device high-tension bridge
Voltage source 2, FPGA 3, the first analog input module 4-1, second analog input module 4-2, RT 5, industrial computer 6 are (i.e. in Fig. 2
Host computer), VCCS 7, analog output module 8, programmable amplifier 9, stream than device 10 and test test product 11.Wherein,
Stream is than device 10 by detection coil 10-1, the first ratio coil 10-2, the second ratio coil 10-3 and permalloy iron core (in figure
Not shown) constitute, it is test system core to flow than device.
The high pressure of high voltage power supply 2 is added separately on divider 1 and test test product 11, wherein, and the electric current for testing test product 11 enters
Enter in the second ratio coil 10-3.
During the voltage signal that divider 1 is obtained is input into the first analog input module 4-1 (such as A/D modular converters), by
The voltage signal is converted from analog into data signal by the first analog input module 4-1, this data signal transmit again to
In the data-in port of FPGA3, it is that follow-up calculating is prepared.
Detection coil 10-1 connects programmable amplifier 9, the uneven letter that detection coil 10-1 is collected by programmable amplifier 9
Number amplify, then data signal is converted to by the second analog input module 4-2, is transmitted to FPGA3.
It should be noted that in actual applications, the first analog input module 4-1 and the second analog input module 4-2 exist
Can be realized using two A/D modular converters on hardware；Or, it would however also be possible to employ realize in same A/D modular converters, point
Two paths not using the A/D modular converters are realizing.
Output end connection analog output module 8 (such as D/A modular converters) of FPGA3, VCCS 7 gather mould
Intend the voltage signal of output module 8, and the voltage signal is converted to during current signal exported to the first ratio coil 10-2.
FPGA3 also has numeral I/O ports, and the amplification that two wires are connected to programmable amplifier 9 is drawn in this digital I/O port
Multiple terminals.Meanwhile, FPGA3 is connected with RT5, and RT5 is connected by Ethernet with industrial computer 6, is built data and is spread out of passage.
According to a kind of implementation, the standard capacitance that builds in advance model in parallel with a resistor can be included in FPGA3, used
In the test of capicitive sample, that is, test test product 11 is capicitive sample；Additionally, according to another kind of implementation, in FPGA3
The standard inductance that builds in advance model in parallel with a resistor can be included, for the test of perceptual test product, that is, test test product 11
For perceptual test product.
In other implementations, the model for wherein building in advance can be selected in FPGA3 according to actual needs, when need
When test product to be tested is capicitive sample, then adopt standard capacitance model in parallel with a resistor；And when the test product for needing test is sense
Property test product when, then adopt standard inductance model in parallel with a resistor.Thus, it is possible to cause of the present utility model based on FPGA and voltage
The full-automatic stream in control electric current source is used not only for the test of capicitive sample than device high-tension bridge, and can be used in perceptual examination
The test of product.
So, by FPGA3, the first analog input module 4-1, the second analog input module 4-2 and VCCS 7
Virtual reference is equivalent to, by industrial computer 6 according to stream than the adjustment of device out-of-balance current situation wherein electric capacity (or inductance), resistance
Parameter, realizes and material standard electric capacity (or standard inductance) and measuring resistance action effect identical compensating current signal, realizes
Automatic measurement and high-acruracy survey.
Additionally, according to a kind of implementation, flowing ratio coil (i.e. the first ratio coil 10- than two fixed numbers of turn of device
2nd, the second ratio coil 10-3) it is connected with test test product, VCCS 7 respectively, detection coil 10-1 is put with program control
Big device 9 is connected with detection stream than device balanced degree.FPGA3 makes its digital I/ according to the output voltage size of detection coil 10-1
O port sends two-way level signal, and selects corresponding multiplication factor by two-way level signal control programmable amplifier 9, makes
Obtain certainty of measurement to greatly improve.
In an implementation of the present utility model, a printed circuit board (PCB) integrated RT5, FPGA3 can be adopted
With digital I/O ports, realize for example with NI sbRIO-9602XT type controllers, the controller major parameter such as one institute of table
Show.
Table one
First analog input module 4-1 and the second analog input module 4-2 can adopt the C series module NI- of NI companies
9215, its major parameter is as shown in Table 2.
Table two
| Model | Signal type | Signal | Passage | Sample rate | Whether synchronous | Resolution ratio |
| NI-9215 | Simulation input | ±10V | 4 | 100kS/s | It is | 16 |
Analog output module 8 can adopt the C series modules of NI companies for NI-9263, and its major parameter is as shown in Table 3.
Table three
| Model | Signal type | Signal | Passage | Sample rate | Whether synchronous | Resolution ratio |
| NI-9263 | Simulation output | ±10V | 4 | 100kS/s | It is | 16 |
Programmable amplifier 9 can adopt HB-881 (V) the type low noise of Nanjing Hong Bin Detection of Weak Signals Co., Ltd production
Sound programmable amplifier, major parameter is as shown in Table 4.
Table four
| Input model | Operating frequency | Input impedance | Input signal | Output signal | Output current |
| HB-881(V) | 1Hz-10kHz | 1MΩ//5pf | 0-±10V | ≤±10V | ≤15mA |
As shown in Fig. 2 high voltage power supply 2 is applied on test test product 11, the electric current for testing test product 11 flows into the second ratio line
Circle 10-3 produces magnetic flux, and detection coil 10-1 can measure unbalance voltage signal.Size and according to unbalance voltage signal
The voltage range that one analog input module 4-1 and the second analog input module 4-2 is received, FPGA3 send digital level control journey
Control amplifier 9 selects suitable enlargement ratio, the unbalance voltage signal after amplification and the voltage signal one obtained from divider 1
And gathered by FPGA3.In FPGA3, voltage divider signal is converted into the high-voltage signal of power supply, and unbalance voltage signal is converted into inspection
The out-of-balance current signal of test coil 10-1.High-voltage signal, out-of-balance current signal, sample frequency are sent to work through RT5
Control machine 6.The validity of data is judged in industrial computer 6 on the basis of sinusoidal signal, illustrates that sampling process is sent out if data invalid
Raw mistake, stops testing and checking mistake immediately；When data are effective, the circuit for testing test product is asked for using least square fitting
This parameter is set to attempt model parameter array send to FPGA3 by parameter, substitutes into default standard capacitance (or standard electric in advance
Sense) with the voltage signal that is compensated in the dummy model of measuring resistance.The data signal is changed into mould through analog output module 8
Intend voltage signal, then compensating current signal is converted to through VCCS 7, flow in the first ratio coil 10-2.This
When the first ratio coil 10-2 in can produce and magnetic flux in opposite direction in the second ratio coil 10-3, two magnetic fluxs are cancelled out each other
The unbalance voltage fundamental voltage amplitude for causing detection coil 10-1 is reduced, continuous collecting mend unbalance voltage signal and convert, on
Pass.If measuring the out-of-balance current fundametal compoment after compensation to reduce in industrial computer 6, judge that compensation effectively, will attempt model
Parameter determination continues to repeat said process for test test product circuit parameter；Otherwise then judge to compensate invalid, correction model parameter weight
New fitting.When compensating invalid continuous 3 times, it is believed that out-of-balance current signal fundamental voltage amplitude has reached what system can be recognized
The limit, test terminate, and calculate capacitance and loss factor, generate report file.
Wherein, FPGA3 realizes collection signal, transmission signal to industrial computer, controls amplifier enlargement ratio, sends compensation letter
Number, the detection function such as recurrent state, and RT realizes that real-time data communication between FPGA3 and industrial computer, control FPGA3 start
The functions such as sampling time, monitoring recurrent state.Whole test process is run without the need for manual intervention full automation.
In the utility model, power supply voltage signal and out-of-balance current signal are gathered by FPGA3, while according to collection
To signal and industrial computer input circuit parameter send thermal compensation signal, this is a really parallel, real-time system, overcomes
The technical barrier of windows operating system poor reals.
Additionally, FPGA3 output signals are voltage signals, and the signal for flowing into the first ratio coil 10-2 should be current signal
Ampere-turn equilibrium can be realized, therefore realizes that voltage/current signals are converted using VCCS 7.
Above-mentioned stream than device electric bridge control system hardware can adopt NI companies of the U.S. production CompactRIO series of products,
Specifically include RT, FPGA, simulation input, simulation output and numeral I/O etc..
In test process, the output voltage of detection coil from maximum to zero output, detection coil and programmable amplifier
It is connected, FPGA sends the multiplication factor that two-way level signal controls programmable amplifier according to the output voltage size of detection coil,
Guarantee that the voltage that the first analog input module is received has suitable multiplication factor and not over amount limit.
By above description, the full-automatic stream based on FPGA and VCCS of the present utility model is higher than device
Piezoelectricity bridge can achieve the measurement of capicitive sample electric capacity and loss factor and perceptual test product inductance and quality factor under condition of high voltage
Measurement.Detection coil is used for detection stream than device balanced degree with programmable amplifier；And the ratio coil difference of two fixed numbers of turn
It is connected with test test product and VCCS, the comparison expression measurement that test product electric current is realized by ampere-turn equilibrium principle.
FPGA internal build electric capacity (or inductance) model and Resistance model for prediction, obtain experimental voltage analog signal from divider, by simulation
Input block converts digital data transmission to FPGA, and digital voltage signal combines electric capacity (or inductance) model and Resistance model for prediction passes through
Computing produces real-time digital voltage signal, the input after digital-to-analogue conversion as VCCS, VCCS
Output compensation electric current.FPGA, simulation input unit (including the first analog input module and the second analog input module) and voltage
Control electric current source is equivalent to virtual reference, by industrial computer according to stream than device out-of-balance current situation adjust inductively or capacitively, electricity
The parameter of resistance is realized and material standard electric capacity (or standard inductance) and measuring resistance action effect identical compensating current signal.
The utility model is related to a kind of test system, and in particular to although a kind of embodiment according to limited quantity is described
The utility model, but above description is benefited from, those skilled in the art will appreciate that, in this practicality for thus describing
In new scope, it can be envisaged that other embodiments.Additionally, it should be noted that language used in this specification primarily to
The purpose of readable and teaching and select, rather than select to explain or limit theme of the present utility model.Cause
This, in the case of without departing from the scope of the appended claims and spirit, for those skilled in the art come
Say that many modifications and changes will be apparent from.For scope of the present utility model, the disclosure done by the utility model is
Illustrative and not restrictive, scope of the present utility model is defined by the appended claims.
Claims (4)
1. the full-automatic stream based on FPGA and VCCS is than device high-tension bridge, it is characterised in that the full-automatic stream
Include divider (1), high voltage power supply (2), FPGA (3), the first analog input module (4-1), the second simulation than device high-tension bridge
Input module (4-2), RT (5), industrial computer (6), VCCS (7), analog output module (8), programmable amplifier
(9), than device (10) and test test product (11), wherein, the stream includes detection coil (10-1), the first ratio line than device (10) to stream
Circle (10-2) and the second ratio coil (10-3)；
The high pressure of high voltage power supply (2) is added separately on the divider (1) and test test product (11), wherein, described
The electric current of test test product (11) is entered in the second ratio coil (10-3)；The voltage signal that divider (1) obtains is defeated
In entering to the first analog input module (4-1), the first analog input module (4-1) is by the voltage signal from simulation letter
In transmitting to the data-in port of the FPGA (3) after number being converted to data signal；Detection coil (10-1) connects institute
Programmable amplifier (9) is stated, the unbalanced signal that the detection coil (10-1) is collected by programmable amplifier (9) amplifies,
The amplification signal that detection coil (10-1) is obtained is converted to data signal and is passed by the second analog input module (4-2)
Transport to FPGA (3)；The output end of FPGA (3) connects analog output module (8), and described VCCS (7) gather
The voltage signal of analog output module (8), and the voltage signal is converted to current signal and is exported to the described first ratio
In example coil (10-2)；The digital I/O ports of FPGA (3) are connected to the multiplication factor wiring of the programmable amplifier (9)
End；FPGA (3) are connected with the RT (5), and RT (5) are connected by Ethernet with the industrial computer (6).
2. full-automatic stream according to claim 1 is than device high-tension bridge, it is characterised in that be provided with mark in FPGA (3)
Pseudo-capacitance model in parallel with a resistor.
3. full-automatic stream according to claim 1 and 2 is than device high-tension bridge, it is characterised in that be provided with FPGA (3)
Standard inductance model in parallel with a resistor.
4. according to claim 1 full-automatic stream than device high-tension bridge, it is characterised in that detection coil (10-1) with
Programmable amplifier (9) are arranged to detect balanced degree of the stream than device (10) that FPGA (3) are arranged to
Output voltage size according to the detection coil (10-1) makes its digital I/O port send two-way level signal, and passes through institute
State two-way level signal and control the corresponding multiplication factor of described programmable amplifier (9) selection.
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| CN110620504A (en) * | 2018-06-19 | 2019-12-27 | 硅工厂股份有限公司 | Power management integrated circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110620504A (en) * | 2018-06-19 | 2019-12-27 | 硅工厂股份有限公司 | Power management integrated circuit |
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