CN209372924U - A kind of measurement D.C. high-current generating device - Google Patents
A kind of measurement D.C. high-current generating device Download PDFInfo
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- CN209372924U CN209372924U CN201822270151.5U CN201822270151U CN209372924U CN 209372924 U CN209372924 U CN 209372924U CN 201822270151 U CN201822270151 U CN 201822270151U CN 209372924 U CN209372924 U CN 209372924U
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Abstract
The utility model discloses a kind of measurement D.C. high-current generating device, feature be include strong current generator, the first current sensor, load to be measured, feedback current sampling module and the pid control module for being preset with target current value；Advantage is to access external communication voltage by the power interface of strong current generator to provide electric current to load to be measured, the loop current signals for flowing through load to be measured are converted to low current signal by the first current sensor, feedback current sampling module acquires the low current and generates corresponding first sampled current signals, pid control module obtains practical loop current value according to the first sampled current signals and is compared with preset target current value, it obtains first voltage adjustment control signal and is sent to strong current generator, strong current generator adjusts the size for the supply voltage that the adjustment of control signal provides load to be measured according to first voltage, cost is relatively low and can effectively improve performance detection accuracy and stability to load to be measured for single unit system.
Description
Technical field
The utility model relates to a kind of current generating apparatus, especially a kind of measurement D.C. high-current generating device.
Background technique
Currently, domestic DC current source is widely used in the occasion of various high-acruracy surveys, inspection, calibration, such as to work
The measuring instruments such as mine enterprise, scientific research, national defence, military project automate in the performance measurement occasion of calibration facility, therefore study and meet essence
The current-source arrangement that degree requires and cost performance is high, practical value and application prospect with higher.
Market at home, although generally existing range of current output is narrow there are many kinds of DC current source, stability, standard
The problems such as exactness is low, resolution ratio is low, operation is not smart enough, and the high-precision current source of import, price is very expensive, general user
It is difficult to bear.
Summary of the invention
The technical problem to be solved by the utility model is to provide one kind, cost is relatively low and can effectively improve to load to be measured
Performance detection accuracy and stability measurement D.C. high-current generating device.
Technical solution adopted by the utility model to solve the above technical problems is as follows: a kind of measurement is occurred with D.C. high-current
Device, it is characterised in that including strong current generator, the first current sensor, load to be measured, feedback current sampling module and pre-
Pid control module equipped with target current value, the power interface of the strong current generator are used to access external communication voltage,
The strong current generator is used to provide the load to be measured supply voltage, and first current sensor is used for will
The loop current signals for flowing through the load to be measured are converted to low current signal, and the feedback current sampling module is for adopting
The low current signal that collection first current sensor generates generates corresponding first sampled current signals, and first is sampled
Current signal is sent to the pid control module, and the pid control module according to the first sampled current signals for obtaining
Practical loop current value is simultaneously compared by the corresponding practical loop current value of loop current signals with preset target current value,
It obtains first voltage adjustment control signal and is sent to the strong current generator, the strong current generator is used for basis
The size for the supply voltage that first voltage adjustment control signal adjustment provides the load to be measured.
The strong current generator includes multiple rearrangeable switch power supplys being arranged in parallel, the rearrangeable switch power supply
Power interface is used to adjust control signal tune according to first voltage for accessing external communication voltage, the rearrangeable switch power supply
The size of the whole supply voltage that the load to be measured is provided.The maximum output current of each rearrangeable switch power supply may be configured as
The output voltage of 60A, rearrangeable switch power supply are adjusted the size of control signal by first voltage and are determined, effectively improve high current hair
The current precision of raw device output, to keep the performance test results to load to be measured more accurate.
Branch road where rearrangeable switch power supply described in one of them is provided with for believing the branch current of the branch
The second current sensor of corresponding low current signal number is converted to, the feedback current sampling module is used to acquire described
The low current signal that the conversion of second current sensor generates generates corresponding second sampled current signals, and by the second sample rate current
Signal is sent to the pid control module, and the pid control module according to the second sampled current signals for being flowed through
Practical loop current value is simultaneously compared by the practical loop current value of the load to be measured with preset target current value, is obtained
Control signal is adjusted to second voltage and is sent to the rearrangeable switch power supply, and the rearrangeable switch power supply is used for according to the
The size for the supply voltage that the adjustment control signal adjustment of two voltages provides the load to be measured.First current sensor uses
The active wideband current sensor of model CSA501-G053T01, for feeding back 50-600A grades of loop currents, the second electric current is passed
Sensor uses model CSA500-G050T01, for feeding back 0-50A grades of loop currents, when needing to detect within the scope of 0-50A
When compared with minor loop electric current, only opens the branch of a rearrangeable switch power supply where the second current sensor and disconnect other branch
Road, feedback current sampling module acquire lesser branch current signal in the branch by the second current sensor, can be effective
The low current precision within the scope of the 0-50A of strong current generator output is improved, to make the performance test results to load to be measured
It is more accurate.
The feedback current sampling module includes high-accuracy metal film resistor and AD accurate measurement module, described
Pid control module includes high-precision DA output module and the control chip for being preset with pid control algorithm, the high-accuracy metal
Film resistor is used to the low current signal that first current sensor generates being converted to analog voltage signal and be sent to
The AD accurate measurement module, the analog voltage signal that the AD accurate measurement module is used to receive are converted to correspondence
The first sampled current signals and be sent to the control chip, the control chip is used to be believed according to the first sample rate current
It number obtains the practical loop current value of loop current signals and compares practical loop current value and preset target current value
Compared with obtaining number adjustment voltage signal and be sent to the high-precision DA output module, the high-precision DA output module
For number adjustment voltage signal to be converted to first voltage adjustment control signal and is sent to the rearrangeable switch power supply.AD
Accurate measurement module is using the ADS1274 chip of Texas Instruments as analog quantity sampling A/D chip, periphery collocation rice Ba Jingmi
The high-accuracy metal film resistor of the Low Drift Temperature of parts company constitutes entire current sample and measures circuit；High-precision DA output module
Using the AD5546 chip of Ya De promise semiconductor company as analog output chip, controls chip and use ST Microelectronics
STM32F407 Series of MCU, control chip by preset pid control algorithm by practical loop current value with it is preset
Target current value is compared, and obtains error and error rate, further calls fuzzy control in preset pid control algorithm
The parameter of table obtains the digital variable quantity of the output end of high-precision DA output module, so that it is defeated to correct high-precision DA output module
Voltage swing out comes real-time perfoming coarse adjustment, fine tuning strong current generator to the current value to be measured for loading output with this or makes it
It keeps stablizing.
It further include shell, the strong current generator, first current sensor, the load to be measured, institute
The feedback current sampling module and the pid control module stated are arranged in the shell, are arranged on the shell
There is radiator.Radiator can routinely be dissipated by multiple groups fan, bronze medal, aluminum thermal fin, aluminum base and chassis radiating hole etc.
Heat structure composition.
Human-computer interaction display module is provided on the shell, the human-computer interaction display module is used for described
Pid control module inputs target current value, while practical loop current value of the real-time display Jing Guo load to be measured.Human-computer interaction is aobvious
Show module using the tiny4412ARM core board of friendly arm company and the Linux embedded operation suitable for portable device
System has friendly human-computer interaction function, show circuit actual current data is periodically flushed by display screen.
Compared with prior art, the utility model has the advantage of when actual measurement, pass through the power supply of strong current generator
Interface accesses external communication voltage and provides electric current to load to be measured, and the first current sensor is used to flow through the circuit of load to be measured
Current signal is converted to low current signal, and feedback current sampling module acquires the low current signal and generates corresponding first sampling electricity
Signal is flowed, and the first sampled current signals are sent to pid control module, pid control module is according to the first sampled current signals
It obtains the practical loop current value of loop current signals and is compared practical loop current value with preset target current value,
It obtains first voltage adjustment control signal and is sent to strong current generator, strong current generator is adjusted according to first voltage and controlled
The size for the supply voltage that signal adjustment provides load to be measured uses the D.C. high-current generating device formed with upper module logical
Cross the first current sensor can acquisition circuit current data in real time, when by pid control module according to calculation processing fructufy
It is accurately controlled the size for the supply voltage that strong current generator provides load to be measured, to fully ensure that present apparatus output
The precision of D.C. high-current effectively improves performance detection accuracy and stability to load to be measured；The present apparatus directlys adopt electricity
The alternating voltage of net output is achieved with the high-precision D.C. high-current of high quality, can be good at applying high-precision in various requirement
The properties of product for spending D.C. high-current source measure occasion, are such as applied to direct-current charging post, DC current sensor or direct current and shunt
The performance detecting and calibration occasion of the pertinent instruments such as device.
Detailed description of the invention
Fig. 1 is the structural principle block diagram of the utility model；
Fig. 2 is the circuit diagram of strong current generator in the utility model；
Fig. 3 is the functional block diagram of part-structure in the utility model.
Specific embodiment
The utility model is described in further detail below in conjunction with figure embodiment.
Embodiment one: a kind of measurement D.C. high-current generating device, including strong current generator 1, the first current sense
Device M2, load 3, feedback current sampling module 4 and the pid control module 5 for being preset with target current value to be measured, strong current generator
For 1 power interface for accessing external communication voltage, strong current generator 1 is used to provide load 3 to be measured supply voltages, and first
Current sensor M2 is used to the loop current signals for flowing through load 3 to be measured being converted to low current signal, and feedback current samples mould
Block 4 is used to acquire corresponding first sampled current signals of low current signal generation of the first current sensor M2 generation, and by the
One sampled current signals are sent to pid control module 5, and pid control module 5 is used to obtain circuit according to the first sampled current signals
Practical loop current value is simultaneously compared by the corresponding practical loop current value of current signal with preset target current value, is obtained
First voltage adjustment control signal is simultaneously sent to strong current generator 1, and strong current generator 1 is used to be adjusted according to first voltage and control
The size for the supply voltage that signal processed adjustment provides load 3 to be measured, strong current generator 1 include it is multiple be arranged in parallel it is adjustable
For accessing external communication voltage, rearrangeable switch power supply U is used for according to the power interface of Switching Power Supply U, rearrangeable switch power supply U
The size for the supply voltage that one voltage adjustment control signal adjustment provides load 3 to be measured.
Wherein, feedback current sampling module 4 includes high-accuracy metal film resistor 41 and chip model is the AD of ADS1274
Accurate measurement module 42, pid control module 5 include the high-precision DA output module 51 and be preset with that chip model is AD5546
The control chip 52 of the model STM32F407 of pid control algorithm, high-accuracy metal film resistor 41 are used to pass in the first electric current
The low current signal that sensor M2 is generated is converted to analog voltage signal and is sent to AD accurate measurement module 42, AD accurate measurement mould
Block 42 is used to being converted to the analog voltage signal received into corresponding first sampled current signals and be sent to control chip 52,
Control chip 52 is used to obtain the practical loop current value of loop current signals according to the first sampled current signals and returns practical
Road current value is compared with preset target current value, is obtained number adjustment voltage signal and is sent supreme precision DA output mould
Block 51, high-precision DA output module 51 are used to number adjustment voltage signal being converted to first voltage adjustment control signal and send
To strong current generator 1.
Embodiment two: rest part is the same as example 1, the difference is that one of rearrangeable switch power supply U institute
Branch road on be provided with the second current sensor M1 for the electric current of the branch to be converted to corresponding low current, feedback electricity
Stream sampling module 4 is used to acquire the low current signal that the second current sensor M1 conversion generates and generates corresponding second sample rate current
Signal, and the second sampled current signals are sent to pid control module 5, pid control module 5 is used for according to the second sample rate current
Signal obtains flowing through the practical loop current value of load 3 to be measured and carries out practical loop current value and preset target current value
Compare, obtain second voltage adjustment control signal and be sent to rearrangeable switch power supply U, rearrangeable switch power supply U is used for according to second
The size for the supply voltage that voltage adjustment control signal adjustment provides load 3 to be measured.
Embodiment three: rest part is the same as example 1, the difference is that further including shell (figure is not shown), greatly
Current feedback circuit 1, the first current sensor M2, load 3, feedback current sampling module 4 and pid control module 5 to be measured are respectively provided with
It is provided in shell, on shell radiator (figure is not shown), is provided with human-computer interaction display module 6, man-machine friendship on shell
Mutual display module 6 is used to input target current value to pid control module 5, while reality of the real-time display by load 3 to be measured is returned
Road current value.
Claims (6)
1. it is a kind of measurement use D.C. high-current generating device, it is characterised in that including strong current generator, the first current sensor,
Load, feedback current sampling module and the pid control module for being preset with target current value to be measured, the strong current generator
Power interface is used to provide the load to be measured power supply electricity for accessing external communication voltage, the strong current generator
Pressure, first current sensor are used to being converted to the loop current signals for flowing through the load to be measured into low current letter
Number, the feedback current sampling module is used to acquire the low current signal that first current sensor generates and generates correspondence
The first sampled current signals, and the first sampled current signals are sent to the pid control module, the PID control
Module is used to obtain the corresponding practical loop current value of loop current signals according to the first sampled current signals and by practical circuit
Current value is compared with preset target current value, is obtained first voltage adjustment control signal and is sent to the high current
Generator, the strong current generator are used to adjust control signal adjustment according to first voltage and provide the load to be measured
Supply voltage size.
2. a kind of measurement D.C. high-current generating device according to claim 1, it is characterised in that the high current
Generator includes multiple rearrangeable switch power supplys being arranged in parallel, and the power interface of the rearrangeable switch power supply is for accessing outside
Alternating voltage, the rearrangeable switch power supply are used to adjust what control signal adjustment provided the load to be measured according to voltage
The size of supply voltage, the branch road where the rearrangeable switch power supply are provided with switch.
3. a kind of measurement D.C. high-current generating device according to claim 2, it is characterised in that described in one of them
Rearrangeable switch power supply where branch road be provided with for the branch current signal of the branch to be converted to corresponding low current
Second current sensor of signal, the feedback current sampling module are used to acquire the second current sensor conversion and produce
Raw low current signal generates corresponding second sampled current signals, and the second sampled current signals are sent to the PID
Control module, the pid control module are used to obtain flowing through according to the second sampled current signals the reality of the load to be measured
Practical loop current value is simultaneously compared by border loop current value with preset target current value, obtains second voltage adjustment control
Signal is simultaneously sent to the rearrangeable switch power supply, and the rearrangeable switch power supply is used to adjust control signal according to second voltage
The size of the supply voltage provided the load to be measured is provided.
4. a kind of measurement D.C. high-current generating device according to claim 2, it is characterised in that the feedback electricity
Stream sampling module includes high-accuracy metal film resistor and AD accurate measurement module, and the pid control module includes high-precision
DA output module and the control chip for being preset with pid control algorithm, the high-accuracy metal film resistor is used for will be described
The low current signal that first current sensor generates is converted to analog voltage signal and is sent to the AD accurate measurement module,
The analog voltage signal that the AD accurate measurement module is used to receive is converted to corresponding first sampled current signals simultaneously
It is sent to the control chip, the control chip is used to obtain loop current signals according to the first sampled current signals
Practical loop current value is simultaneously compared by practical loop current value with preset target current value, obtains number adjustment voltage letter
Number and be sent to the high-precision DA output module, the high-precision DA output module is used to number adjusting voltage signal
It is converted to first voltage adjustment control signal and is sent to the rearrangeable switch power supply.
5. a kind of measurement D.C. high-current generating device according to claim 1, it is characterised in that it further include shell, institute
The strong current generator stated, first current sensor, the load to be measured, the feedback current sampling module and
The pid control module is arranged in the shell, is provided with radiator on the shell.
6. a kind of measurement D.C. high-current generating device according to claim 5, it is characterised in that on the shell
It is provided with human-computer interaction display module, the human-computer interaction display module is used to input target to the pid control module
Current value, while practical loop current value of the real-time display Jing Guo load to be measured.
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| CN201822270151.5U CN209372924U (en) | 2018-12-29 | 2018-12-29 | A kind of measurement D.C. high-current generating device |
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| CN201822270151.5U CN209372924U (en) | 2018-12-29 | 2018-12-29 | A kind of measurement D.C. high-current generating device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112564509A (en) * | 2020-10-31 | 2021-03-26 | 张家港宏昌钢板有限公司 | High-stability numerical control large-current generator |
| CN113484565A (en) * | 2021-07-14 | 2021-10-08 | 国网新疆电力有限公司电力科学研究院 | Direct current signal generating device for calibrating low-frequency alternating current signal and calibration method |
| CN114860015A (en) * | 2022-03-11 | 2022-08-05 | 河北惠仁医疗设备科技有限公司 | Ultrahigh-stability power supply equipment |
-
2018
- 2018-12-29 CN CN201822270151.5U patent/CN209372924U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112564509A (en) * | 2020-10-31 | 2021-03-26 | 张家港宏昌钢板有限公司 | High-stability numerical control large-current generator |
| CN113484565A (en) * | 2021-07-14 | 2021-10-08 | 国网新疆电力有限公司电力科学研究院 | Direct current signal generating device for calibrating low-frequency alternating current signal and calibration method |
| CN114860015A (en) * | 2022-03-11 | 2022-08-05 | 河北惠仁医疗设备科技有限公司 | Ultrahigh-stability power supply equipment |
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Granted publication date: 20190910 |