CN209387854U - A kind of divider calibration of divider ratio platform - Google Patents
A kind of divider calibration of divider ratio platform Download PDFInfo
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- CN209387854U CN209387854U CN201821893076.1U CN201821893076U CN209387854U CN 209387854 U CN209387854 U CN 209387854U CN 201821893076 U CN201821893076 U CN 201821893076U CN 209387854 U CN209387854 U CN 209387854U
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- digital multimeter
- divider
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- industrial control
- calibration
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Abstract
The utility model discloses divider calibration of divider ratio platform, including the first digital multimeter, the first digital multimeter is used to acquire the output signal of standard voltage divider；Second digital multimeter is used to acquire the output signal of tested divider；The output end of first digital multimeter and the second digital multimeter communicates connection with industrial control all-in-one machine, the input terminal of the output end connection triggering source device of industrial control all-in-one machine, the output end of triggering source device is connected with the first digital multimeter with the input terminal of the second digital multimeter respectively, so that the first digital multimeter and the second digital multimeter synchronous acquisition, industrial control all-in-one machine is simultaneously handled the collected data of institute.This calibration platform passes through the output signal of two digital multimeter synchronous acquisition standard voltage dividers and tested divider, then two collected data of digital multimeter institute are handled by industrial control all-in-one machine, a large amount of manpowers are not only saved, but also data processing accuracy is high, stability is good.
Description
Technical field
The utility model relates to technical field of electric power, and in particular to a kind of divider calibration of divider ratio platform.
Background technique
China be possess in the world DC transmission engineering quantity at most, conveying circuit longest, conveying voltage class it is highest
Country, divider is indispensable main equipment in DC transmission system.High voltage direct current divider is a kind of for electric power
The instrument of system and electrical electronic equipment manufacturing department's measurement DC high voltage.The upper end grading shield is high-voltage end, can directly be connect
Enter tested high pressure, there is Special grounding end in lower end, uses for ground connection, connects high-voltage bleeder and low pressure display instrument with private cable
Table, and select corresponding voltage and range that can start to measure.Due to its vital effect, need to carry out example to divider
Capable calibration test and field calibration test, the standard divider of high accuracy just become indispensable.
In previous artificial calibration experiments, manual record data are needed.Artificial reading is it is difficult to ensure that synchronism, and two
Digital multimeter shows data simultaneously, and readings per second is primary, and artificial observation is influenced by many uncertain factors it is difficult to ensure that essence
Exactness.It is collected into after measurement data and needs to carry out it to arrange calculating and error analysis, manual entry information takes a long time and not
It can guarantee accuracy.
Preliminary reading, record and computing function may be implemented in common calibration software, but due to used calculating
Number meter accuracy is not high, while program optimization degree is lower, and precision hardly results in guarantee, while data storage function even needs
It is perfect.
Utility model content
The purpose of the utility model is to overcome above-mentioned the deficiencies in the prior art, provide a kind of divider intrinsic standoff ratio school
Quasi- platform, with calibration test precision.
To achieve the above object, the technical solution of the utility model is:
A kind of divider calibration of divider ratio platform, including the first digital multimeter, the second digital multimeter, industry control one
Body machine and triggering source device；Wherein, first digital multimeter is used to acquire the output signal of standard voltage divider；Second number
Word multimeter is used to acquire the output signal of tested divider；The output end of first digital multimeter and the second digital multimeter is equal
It communicates connection with the industrial control all-in-one machine, the input terminal of the output end connection triggering source device of industrial control all-in-one machine, trigger source dress
The output end set is connected with the first digital multimeter with the input terminal of the second digital multimeter respectively, so that the first number ten thousand
It is handled with table and the second digital multimeter synchronous acquisition, industrial control all-in-one machine and to the collected data of institute.
First digital multimeter and the second digital multimeter are Agilent34401A digital multimeter.
The calibration platform of the utility model passes through two digital multimeter synchronous acquisition standard voltage dividers and tested divider
Output signal, then the collected data of two digital multimeter institute are handled by industrial control all-in-one machine, are not only saved
A large amount of manpowers, and data processing accuracy is high, and stability is good, multiple functional.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the high voltage direct current voltage divider provided by the embodiment of the utility model than calibrating platform；
Fig. 2 is synchro measure flow chart；
In figure: 1, the first digital multimeter；2, the second digital multimeter；3, industrial control all-in-one machine；4, source device is triggered.
Specific embodiment
The content of the utility model is described in further details with reference to the accompanying drawings and detailed description.
Embodiment:
As shown in fig.1, divider calibration of divider ratio platform provided in this embodiment includes the first digital multimeter
1, the second digital multimeter 2, industrial control all-in-one machine 3 and triggering source device 4.
Wherein, which is used to acquire the output signal of standard voltage divider；Second digital multimeter 2 is used
In the output signal for acquiring tested divider；First digital versatile, 1 table and the output end of the second digital multimeter 2 are and industry control one
Body machine 3 communicates connection, and the input terminal of the output end connection triggering source device of industrial control all-in-one machine 3 triggers the output end of source device 4
It is connected respectively with the first digital multimeter 1 with the input terminal of the second digital multimeter 2, so that 1 He of the first digital multimeter
Second digital multimeter, 2 synchronous acquisition, industrial control all-in-one machine 3 are simultaneously handled the collected data of institute.Specifically, at this
In application, industrial control all-in-one machine 3 using SG104-BGCM model industrial control all-in-one machine.
Specifically, in the present embodiment, the first digital multimeter 1 and the second digital multimeter 2 are to use
Agilent34401A digital multimeter, Agilent34401A are a quick, flexible and high-precision digital multimeter, thereafter
There is serial ports RS232 and GPIB slot on panel, connect and realize with industrial control all-in-one machine by the way that setting serial port communicating protocol is convenient
Remote control.As a kind of high-precision measuring device, Agilent34401A has flexible system performance, and reading rate is per second
Up to 1000 reading and amount of storage up to 512 read.As a kind of reliable laboratory apparatus, Agilent34401A also has
There is convenient experimental features, clearly vacuum fluorescent display clear reading, cured mathematical operation function is convenient and practical, exempts from hand
The functions such as dynamic, reading holding all dramatically facilitate the use of operator.
The output end of first digital multimeter 1 and the second digital multimeter 2 passes through LabView having data processing function
Device and industrial control all-in-one machine 3 carry out RS-232 serial communication, and (LabView device is the industry control one for being built in SG104-BGCM model
In body machine), the input terminal of the output end connection triggering source device 4 of industrial control all-in-one machine 3, the output signal point of triggering source device 4
It is not connected to the input terminal of the first digital multimeter 1 and the second digital multimeter 2.
And above-mentioned triggering source device 4 uses independent external trigger source device, when triggering source device 4 is simultaneously to the first number
When word multimeter 1 and the second digital multimeter are triggered into 2 rows, the first digital multimeter 1 and second is realized in the control of industrial control all-in-one machine 3
2 synchronous acquisition of digital multimeter, and the data of acquisition are handled.
The process of synchronous acquisition as shown in Figure 2 specifically:
Synchronous measurement technique used in this programme is to realize two high accuracy numbers ten thousand using industrial control all-in-one machine control
It is handled with table synchronous acquisition and to the data collected.First digital multimeter and the second digital multimeter can
Guarantee that the precision of acquisition data, the synchronism of acquisition are then to control to realize by LabView device well.LabVIEW device
Be divided into multiple modules, be initialization module first, by simultaneously configure two Initialize controls make industrial control all-in-one machine with
First digital multimeter and the second digital multimeter can be realized communication, this module can realize that primary configuration can permanently lead to
News, until stopping.
Just need to be remotely controlled the first digital multimeter and the second digital multimeter synchronous acquisition after establishing communication.Together
The realization of step acquisition needs to control the first digital multimeter and the second digital multimeter while triggering, this is used in the examples
It is that external trigger is realized to the first digital multimeter and the second digital multimeter simultaneously with a triggering source device.
It is establishing with after the communication of equipment, it is same that the first digital multimeter and the second digital multimeter ceaselessly carry out data
Step acquisition, by the synchro measure of the high accuracy number multimeter of front, the data storage collected is in SG104-BGCM type
Number industrial control all-in-one machine in, and the data are calculated, and using mean error and A class uncertainty double standards to soft
Part is calibrated.Wherein mean error and A class uncertainty can be obtained by following algorithm:
(1) extracts the collected data of the first digital multimeter and the second digital multimeter institute；
(2) calculates average value according to three voltage values continuously measured:
Wherein, vb1、vb2、vb3It is continuous three of the standard voltage divider low-pressure side that the first digital multimeter collects
Voltage value, VbFor the average value of three continuous voltage values；vs1、vs2、vs3The tested partial pressure collected for the second digital multimeter
Continuous three voltage values of device low-pressure side, VsIt is then the average value of three continuous voltage values；
(3) the nominal partial pressure ratio α of combined standard divider acquires the practical intrinsic standoff ratio of tested divider:
(4) seeks tested divider elementary error:
αjTo be tested the practical intrinsic standoff ratio of divider, γ is the elementary error of tested divider, and elementary error is tested partial pressure
One important technology index of device；
(5) solves A class uncertainty:
First find out the average value of 10 tested practical no-load voltage ratios of divider:
The calculating of A class uncertainty uses Bessel Formula:
It brings specific test value into above-mentioned universal calculation equation, obtains solving the specific formula of A class uncertainty:
For above-described embodiment simply to illustrate that the technical ideas and features of the present invention, its purpose is allows this field
Interior those of ordinary skill can understand the content of the utility model and implement accordingly, can not limit the utility model with this
Protection scope.The equivalent changes or modifications that all essence according to the content of the present invention is made, should all cover in this reality
With in novel protection scope.
Claims (2)
1. a kind of divider calibration of divider ratio platform, which is characterized in that including the first digital multimeter, the second digital versatile
Table, industrial control all-in-one machine and triggering source device；Wherein,
First digital multimeter is used to acquire the output signal of standard voltage divider；Second digital multimeter is tested for acquiring
The output signal of divider；The output end of first digital multimeter and the second digital multimeter is communicated with the industrial control all-in-one machine
News connection, the input terminal of the output end connection triggering source device of industrial control all-in-one machine trigger the output end of source device respectively with first
Digital multimeter is connected with the input terminal of the second digital multimeter, so that the first digital multimeter and the second digital multimeter
Synchronous acquisition, industrial control all-in-one machine are simultaneously handled the collected data of institute.
2. divider calibration of divider ratio platform as described in claim 1, which is characterized in that first digital multimeter
It is Agilent34401A digital multimeter with the second digital multimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821893076.1U CN209387854U (en) | 2018-11-16 | 2018-11-16 | A kind of divider calibration of divider ratio platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821893076.1U CN209387854U (en) | 2018-11-16 | 2018-11-16 | A kind of divider calibration of divider ratio platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209387854U true CN209387854U (en) | 2019-09-13 |
Family
ID=67864973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821893076.1U Active CN209387854U (en) | 2018-11-16 | 2018-11-16 | A kind of divider calibration of divider ratio platform |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209387854U (en) |
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2018
- 2018-11-16 CN CN201821893076.1U patent/CN209387854U/en active Active
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