CN110187298A - A kind of the electronic load automatic patching system and its matching process of current loop - Google Patents
A kind of the electronic load automatic patching system and its matching process of current loop Download PDFInfo
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- CN110187298A CN110187298A CN201910464453.2A CN201910464453A CN110187298A CN 110187298 A CN110187298 A CN 110187298A CN 201910464453 A CN201910464453 A CN 201910464453A CN 110187298 A CN110187298 A CN 110187298A
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- loop
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- load impedance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
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- General Physics & Mathematics (AREA)
- Control Of Voltage And Current In General (AREA)
Abstract
The invention discloses a kind of electronic load automatic patching systems of current loop, comprising: test loop, for connecting tested equipment；Bypass loop, it is in parallel with test loop, it is provided with load balancing apparatus；Load detecting control circuit is communicated to connect for detecting the load impedance of test loop and bypass loop, and with the load balancing apparatus.A kind of electronic load automatic patching system of current loop of the present invention, pass through bypass loop of the parallel connection one with load balancing apparatus on the test loop of tested equipment connection, and load balancing apparatus and a load detecting control circuit communicate to connect, the load impedance of load detecting control circuit detection simultaneously test loop and bypass loop, when the load impedance imbalance of test loop and bypass loop, load detecting control circuit drives load balancing apparatus to reach the matched purpose of load balance, realizes and reduces test result error.
Description
[technical field]
The present invention relates to the technical field of equipment detection, in particular to the electronic load Auto-matching systems of a kind of current loop
System and its matching process.
[background technique]
In the test of some specific functions of equipment, for example, the half-wave test of sine wave, the test etc. of a quarter.It is surveying
During examination, the virtual current constant-current source provided is the sinusoidal waveform of standard, and reference device is also the sinusoidal current of measurement standard
, if the imbalance of tested machine utilization will cause the error of test result, wherein the balance level loaded is required in 0.1 milli
Europe rank, and test electric current will in 100A, for this purpose, propose a kind of current loop electronic load automatic patching system and its
Method of completing the square makes tested equipment balancing the load in the detection process, reduces the error of test result.
[summary of the invention]
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, the electronic load for providing a kind of current loop is automatic
Matching system and its matching process aim to solve the problem that the imbalance that machine utilization is detected in test process in the prior art will cause
The technical issues of test result error.
To achieve the above object, the invention proposes a kind of electronic load automatic patching systems of current loop, comprising:
Test loop, for connecting tested equipment；
Bypass loop, it is in parallel with test loop, it is provided with load balancing apparatus；
Load detecting control circuit, for detecting the load impedance of test loop and bypass loop, and with the load
Balancing equipment communication connection.
Preferably, being provided with the current control equipment for controlling tested equipment test electric current on the test loop
One, the current control equipment one is connected with the tested equipment.
Preferably, being provided with the current control for controlling load balancing apparatus test electric current in the bypass loop
Equipment two, the current control equipment two are connected with the load balancing apparatus.
Preferably, being provided with test loop load impedance measurement end in the load detecting control circuit, bypassing back
Road load impedance measurement end and control terminal, the test loop load impedance measurement end, bypass loop load impedance measurement end
It is connect respectively by detection line with test loop, bypass loop；The control terminal passes through connecting line and the load balance
Equipment communication connection.
Preferably, being provided with test loop load impedance Acquisition Circuit, bypass in the load detecting control circuit
Loop load impedance collection circuit, MCU unit and driving circuit, the test loop load impedance Acquisition Circuit and are tested back
The connection of road load impedance measurement end, the bypass loop load impedance Acquisition Circuit and bypass loop load impedance measurement end connect
It connects, the driving circuit is connect with control terminal, the test loop load impedance Acquisition Circuit, bypass loop load impedance
Acquisition Circuit and driving circuit are connect with MCU unit communication.
The present invention also proposes a kind of matching process of the electronic load automatic patching system of current loop, including walks as follows
It is rapid:
S1, preparation: tested equipment to be detected is accessed in test loop, by the test loop of load detecting control circuit
Load impedance measurement end, bypass loop load impedance measurement end and control terminal are flat with test loop, bypass loop and load respectively
Weighing apparatus equipment connects；
S2, detection: power supply, starting load detection control are accessed into the entire circuit being made of test loop and bypass loop
Circuit, current control equipment one and current control equipment two control the test electric current of test loop and bypass loop respectively, test
Loop load impedance collection circuit and bypass loop load impedance Acquisition Circuit difference periodic detection collecting test circuit and bypass
The load impedance in circuit, and the load impedance of acquisition is sent to MCU unit；
S3, balance: MCU unit is to test loop load impedance Acquisition Circuit and bypass loop load impedance Acquisition Circuit institute
The load impedance of acquisition is compared, and when the load impedance imbalance of test loop and bypass loop, then MCU unit passes through drive
Dynamic circuit drives load balancing apparatus adjustment is loaded to the load impedance balance of test loop and bypass loop.
Preferably, current control equipment one and current control equipment two control test loop respectively in the S2 step
Test electric current with bypass loop is 100A.
Preferably, the load impedance balance level of test loop and bypass loop is required in 0.1 milli in the S3 step
Europe rank.
Beneficial effects of the present invention: compared with prior art, a kind of electronic load of current loop provided by the invention from
Dynamic matching system, by bypass loop of the parallel connection one with load balancing apparatus on the test loop of tested equipment connection, and
And load balancing apparatus and a load detecting control circuit communicate to connect, while load detecting control circuit detection test loop and
The load impedance of bypass loop, when the load impedance imbalance of test loop and bypass loop, load detecting control circuit is driven
Dynamic load balancing equipment reaches the matched purpose of load balance, realizes and reduces test result error.
Feature and advantage of the invention will be described in detail by embodiment combination attached drawing.
[Detailed description of the invention]
Fig. 1 is a kind of block diagram representation of the electronic load automatic patching system of current loop of the embodiment of the present invention；
Fig. 2 is the block diagram representation of the load detecting control circuit of the embodiment of the present invention.
In figure: 1- test loop, 10- are detected equipment, 11- current control equipment one, 2- bypass loop, 21- load balance
Equipment, 22- current control equipment two, 3- load detecting control circuit, 31- test loop load impedance measurement end, 32- are bypassed back
Road load impedance measurement end, 33- control terminal, 34- test loop load impedance Acquisition Circuit, 35- bypass loop load impedance are adopted
Collector, 36-MCU unit, 37- driving circuit.
[specific embodiment]
In order to make the objectives, technical solutions and advantages of the present invention clearer, right below by attached drawing and embodiment
The present invention is further elaborated.However, it should be understood that specific embodiment described herein is only used to explain this hair
Range that is bright, being not intended to restrict the invention.In addition, in the following description, descriptions of well-known structures and technologies are omitted, with
Avoid unnecessarily obscuring idea of the invention.
Refering to fig. 1, the embodiment of the present invention provides a kind of electronic load automatic patching system of current loop, comprising:
Test loop 1, for connecting tested equipment 10；
Bypass loop 2, it is in parallel with test loop 1, it is provided with load balancing apparatus 21；
Load detecting control circuit 3 is born for detecting the load impedance of test loop 1 and bypass loop 2, and with described
Balancing equipment 21 is carried to communicate to connect.
Further, the current control that electric current is tested for controlling tested equipment 10 is provided on the test loop 1
Equipment 1, the current control equipment 1 are connected with the tested equipment 10；It is provided in the bypass loop 2
For control load balancing apparatus 21 test electric current current control equipment 2 22, the current control equipment 2 22 with it is described
Load balancing apparatus 21 connect.
In embodiments of the present invention, current control equipment 1 and current control equipment 2 22 control test loop 1 respectively
Test electric current with bypass loop 2 is 100A, and is the sinusoidal waveform of standard.
Further, test loop load impedance measurement end 31, bypass are provided in the load detecting control circuit 3
Loop load impedance measurement end 32 and control terminal 33, the test loop load impedance measurement end 31, bypass loop load resistance
Anti- measurement end 32 is connect by detection line with test loop, bypass loop respectively；The control terminal 33 passes through connecting line and institute
The load balancing apparatus 21 stated communicates to connect.
Further, it is adopted referring to Fig.2, being provided with test loop load impedance in the load detecting control circuit 3
Collector 34, bypass loop load impedance Acquisition Circuit 35, MCU unit 36 and driving circuit 37, the test loop load
Impedance collection circuit 34 is connect with test loop load impedance measurement end 31, the bypass loop load impedance Acquisition Circuit 35
It is connect with bypass loop load impedance measurement end 32, the driving circuit 37 is connect with control terminal 33, the test loop
Load impedance Acquisition Circuit 34, bypass loop load impedance Acquisition Circuit 35 and driving circuit 37 with 36 communication link of MCU unit
It connects.
In embodiments of the present invention, it includes: that antiresonant circuit is negative that load balancing apparatus 21, which adjusts the mode of load impedance,
Matching process and series resonant circuit load matched method are carried, antiresonant circuit load matched method is by changing in circuit
Capacitor, inductance, resistance value change impedance, series resonant circuit load matched method by change the resistance value in circuit come
Change impedance.
The embodiment of the present invention also proposes a kind of matching process of the electronic load automatic patching system of current loop, including such as
Lower step:
S1, preparation: tested equipment 10 to be detected is accessed in test loop 1, by the test of load detecting control circuit 3
Loop load impedance measurement end 31, bypass loop load impedance measurement end 32 and control terminal 33 respectively with test loop 1, bypass back
Road 2 and load balancing apparatus 21 connect.
S2, detection: power supply is accessed into the entire circuit being made of test loop 1 and bypass loop 2, power supply is using virtual electricity
Constant-current source is flowed, starting load detects control circuit 3, and current control equipment 1 and current control equipment 2 22 control test respectively
The test electric current in circuit 1 and bypass loop 2, test loop load impedance Acquisition Circuit 34 and bypass loop load impedance acquisition electricity
The load impedance in periodic detection collecting test circuit 1 and bypass loop 2 is distinguished on road 35, and the load impedance of acquisition is sent to
MCU unit 36.
S3, balance: MCU unit 36 acquires electricity to test loop load impedance Acquisition Circuit 34 and bypass loop load impedance
The load impedance collected of road 35 is compared, and when the load impedance imbalance of test loop 1 and bypass loop 2, then MCU is mono-
Member 36 adjusts the load impedance for being loaded to test loop 1 and bypass loop 2 by the driving load balancing apparatus 21 of driving circuit 37
Balance.
Wherein, in S2 step, current control equipment 1 and current control equipment 2 22 control test loop 1 and side respectively
The test electric current in road circuit 2 is 100A, and current control equipment 1 and current control equipment 2 22 are test loop 1 and bypass back
The electric current that road 2 provides is the sinusoidal waveform of standard.
Further, in the S3 step, the load impedance balance level of test loop 1 and bypass loop 2 is required
0.1 milliohm rank.MCU unit 36 calculates test loop load impedance Acquisition Circuit 34 and bypass loop load impedance acquisition electricity
The load impedance collected of road 35 is poor, is accurate to 0.1 milliohm rank, if the load impedance of test loop 1 is greater than bypass loop 2
Load impedance, then MCU unit 36 drives load balancing apparatus 21 to raise the load impedance difference and extremely bypasses back by driving circuit 37
The load impedance on road 2 and the load impedance of test loop 1 balance；Conversely, then MCU unit 36 passes through the driving load of driving circuit 37
Balancing equipment 21 is lowered the load impedance difference to the load impedance of bypass loop 2 and the load impedance of test loop 1 and is balanced；If flat
The grade that weighs does not need then to adjust in 0.1 milliohm rank.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modification, equivalent replacement or improvement etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (8)
1. a kind of electronic load automatic patching system of current loop characterized by comprising
Test loop (1), for connecting tested equipment (10)；
Bypass loop (2), it is in parallel with test loop (1), it is provided with load balancing apparatus (21)；
Load detecting control circuit (3), for detecting the load impedance of test loop (1) and bypass loop (2), and with it is described
Load balancing apparatus (21) communication connection.
2. a kind of electronic load automatic patching system of current loop as described in claim 1, it is characterised in that: the survey
The current control equipment one (11) for controlling tested equipment (10) test electric current, the electric current are provided in examination circuit (1)
Control equipment one (11) is connected with the tested equipment (10).
3. a kind of electronic load automatic patching system of current loop as described in claim 1, it is characterised in that: the side
The current control equipment two (22) for controlling load balancing apparatus (21) test electric current is provided on road circuit (2), it is described
Current control equipment two (22) is connected with the load balancing apparatus (21).
4. a kind of electronic load automatic patching system of current loop as described in claim 1, it is characterised in that: described is negative
It carries and is provided with test loop load impedance measurement end (31), bypass loop load impedance measurement end in detection control circuit (3)
(32) and control terminal (33), the test loop load impedance measurement end (31), bypass loop load impedance measurement end (32)
It is connect respectively by detection line with test loop, bypass loop；The control terminal (33) passes through connecting line and the load
Balancing equipment (21) communication connection.
5. a kind of electronic load automatic patching system of current loop as claimed in claim 4, it is characterised in that: described is negative
It carries and is provided with test loop load impedance Acquisition Circuit (34), bypass loop load impedance acquisition electricity in detection control circuit (3)
Road (35), MCU unit (36) and driving circuit (37), the test loop load impedance Acquisition Circuit (34) and test loop
Load impedance measurement end (31) connection, the bypass loop load impedance Acquisition Circuit (35) and bypass loop load impedance are surveyed
End (32) connection is measured, the driving circuit (37) is connect with control terminal (33), and the test loop load impedance acquires electricity
Road (34), bypass loop load impedance Acquisition Circuit (35) and driving circuit (37) are communicated to connect with MCU unit (36).
6. a kind of matching process of the electronic load automatic patching system of current loop, characterized by the following steps:
S1, preparation: tested equipment (10) to be detected is accessed in test loop (1), by the survey of load detecting control circuit (3)
Try loop load impedance measurement end (31), bypass loop load impedance measurement end (32) and control terminal (33) respectively with test loop
(1), bypass loop (2) and load balancing apparatus (21) connect；
S2, detection: the entire circuit access power supply that will be made of test loop (1) and bypass loop (2), starting load detection control
Circuit (3) processed, current control equipment one (11) and current control equipment two (22) control test loop (1) and bypass loop respectively
(2) test electric current, test loop load impedance Acquisition Circuit (34) and bypass loop load impedance Acquisition Circuit (35) are respectively
The load impedance in periodic detection collecting test circuit (1) and bypass loop (2), and it is mono- that the load impedance of acquisition is sent to MCU
First (36)；
S3, balance: MCU unit (36) acquires electricity to test loop load impedance Acquisition Circuit (34) and bypass loop load impedance
Road (35) load impedance collected is compared, when the load impedance imbalance of test loop (1) and bypass loop (2),
Then MCU unit (36) is loaded to test loop (1) and bypass by driving circuit (37) driving load balancing apparatus (21) adjustment
The load impedance in circuit (2) balances.
7. a kind of matching process of the electronic load automatic patching system of current loop as claimed in claim 6, feature exist
In: in the S2 step, current control equipment one (11) and current control equipment two (22) control test loop (1) and side respectively
The test electric current in road circuit (2) is 100A.
8. a kind of matching process of the electronic load automatic patching system of current loop as claimed in claim 6, feature exist
In: in the S3 step, the load impedance balance level of test loop (1) and bypass loop (2) is required in 0.1 milliohm rank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910464453.2A CN110187298A (en) | 2019-05-30 | 2019-05-30 | A kind of the electronic load automatic patching system and its matching process of current loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910464453.2A CN110187298A (en) | 2019-05-30 | 2019-05-30 | A kind of the electronic load automatic patching system and its matching process of current loop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110187298A true CN110187298A (en) | 2019-08-30 |
Family
ID=67719077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910464453.2A Pending CN110187298A (en) | 2019-05-30 | 2019-05-30 | A kind of the electronic load automatic patching system and its matching process of current loop |
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| CN (1) | CN110187298A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060001408A1 (en) * | 2004-07-02 | 2006-01-05 | Southwell Scott W | Digital calibration with lossless current sensing in a multiphase switched power converter |
| CN201226497Y (en) * | 2008-06-26 | 2009-04-22 | 保锐科技股份有限公司 | High efficiency power supply equipment |
| CN204462373U (en) * | 2015-03-27 | 2015-07-08 | 国家电网公司 | A kind of load Auto-matching instrument of electric energy meter direct current even-order harmonic test |
| CN105425199A (en) * | 2015-11-27 | 2016-03-23 | 深圳市科陆驱动技术有限公司 | Apparatus and method of direct-current even harmonic influence experiment of electric energy meter |
| CN107834939A (en) * | 2017-10-31 | 2018-03-23 | 哈尔滨兴亚技术有限公司 | A kind of intelligent load-balancing device |
| CN104698425B (en) * | 2015-03-27 | 2019-03-05 | 国家电网公司 | A kind of load automatic matching method of electric energy meter direct current even-order harmonic test |
-
2019
- 2019-05-30 CN CN201910464453.2A patent/CN110187298A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060001408A1 (en) * | 2004-07-02 | 2006-01-05 | Southwell Scott W | Digital calibration with lossless current sensing in a multiphase switched power converter |
| CN201226497Y (en) * | 2008-06-26 | 2009-04-22 | 保锐科技股份有限公司 | High efficiency power supply equipment |
| CN204462373U (en) * | 2015-03-27 | 2015-07-08 | 国家电网公司 | A kind of load Auto-matching instrument of electric energy meter direct current even-order harmonic test |
| CN104698425B (en) * | 2015-03-27 | 2019-03-05 | 国家电网公司 | A kind of load automatic matching method of electric energy meter direct current even-order harmonic test |
| CN105425199A (en) * | 2015-11-27 | 2016-03-23 | 深圳市科陆驱动技术有限公司 | Apparatus and method of direct-current even harmonic influence experiment of electric energy meter |
| CN107834939A (en) * | 2017-10-31 | 2018-03-23 | 哈尔滨兴亚技术有限公司 | A kind of intelligent load-balancing device |
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| PB01 | Publication | ||
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Application publication date: 20190830 |
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| RJ01 | Rejection of invention patent application after publication |