CN108627787A - A kind of standard closed loop resistance device - Google Patents
A kind of standard closed loop resistance device Download PDFInfo
- Publication number
- CN108627787A CN108627787A CN201810224288.9A CN201810224288A CN108627787A CN 108627787 A CN108627787 A CN 108627787A CN 201810224288 A CN201810224288 A CN 201810224288A CN 108627787 A CN108627787 A CN 108627787A
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- CN
- China
- Prior art keywords
- shell
- closed loop
- wall
- resistance
- standard closed
- Prior art date
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Classifications
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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
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
- G01R35/007—Standards or reference devices, e.g. voltage or resistance standards, "golden references"
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/02—Housing; Enclosing; Embedding; Filling the housing or enclosure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C3/00—Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Details Of Resistors (AREA)
Abstract
This application discloses a kind of standard closed loop resistance device, including shell and resistance, shell includes shell and shell cover, shell cover is arranged above shell, shell includes inner wall, outer wall and bottom, and inner and outer wall is both connected on bottom and the two is parallel, makes to form an annular groove between inner and outer wall；In the annular groove that resistance is arranged between inner walls and outer wall, there are test points on the surface of resistance.Also there are instrument connections for the inner wall of the shell simultaneously.The resistance value of standard closed loop resistance device is obtained by calculation again for test number.The material settling out that standard closed loop resistance device provided by the invention uses, accuracy is high, and uncertainty is only 0.1%；The light compact volume and convenience of the standard closed loop resistance device carries simultaneously, can be tested in laboratory and scene.
Description
Technical field
The present invention relates to electronic field more particularly to a kind of standard closed loop resistance devices.
Background technology
Pliers-shape earthing resistance instrument is the important breakthrough of traditional ground resistance measuring technique, is widely used in electric power, meteorology, electricity
The ground resistance measurement of letter, oil field, building and industrial equipment.Pliers-shape earthing resistance instrument measurement method is used with earth resistance meter
Method is entirely different, when measurement has the earthed system in circuit, is not required to auxiliary electrode, is not required to by grounding body and load isolation, only
Tested ground wire need to be placed in jaw geometric center position, you can read grounding resistance from liquid crystal display, realize on-line measurement.
When measuring in this way, do not have to auxiliary electrode, cloth pole error is not present, when retest, as a result consistency is very good.Pincers
The application of shape ground meter is more and more extensive, and whether product itself is qualified, and whether performance meets technical indicator, needs to carry out
Metrology and measurement.
The test of pincerlike earth resistance tester generally uses calibration resistor method, by two output ends of calibration resistor
Button is connected with a conducting wire and constitutes circuit.Pincerlike earth resistance tester vises connecting wire and makes at connecting wire as possible
In the geometric center position of binding clip, and it is vertical with binding clip, and adjustment criteria resistor to test point reads pliers-shape earthing resistance instrument
Show value calculates the error of indication.But the contact resistance of connecting wire resistance, conducting wire and calibration resistor is all attached to and measures back
Lu Zhong causes measurement result accuracy not high；In addition the closed loop size that the length of conducting wire is formed, flexible wire can not be accurately placed in
Jaw geometric center position, all impacts measurement result.
Therefore, the present invention proposes a kind of standard closed loop resistance device, and the material settling out of use, accuracy is high, and uncertainty is only
It is 0.1%；The light compact volume and convenience of the standard closed loop resistance device carries simultaneously, can be tested in laboratory and scene.
Invention content
In view of this, to solve the problems, such as that the big precision of error of existing pincerlike earth resistance tester test resistance is low,
This application provides a kind of standard closed loop resistance device, the material settling out of use, accuracy is high, and uncertainty is only 0.1%；Simultaneously
The light compact volume and convenience of the standard closed loop resistance device carries, and can be tested in laboratory and scene.
The embodiment of the present application provides a kind of standard closed loop resistance device, including shell and resistance, and shell includes shell and shell
Lid, shell cover are arranged above shell, and shell includes inner wall, outer wall and bottom, and inner and outer wall is both connected on bottom and the two
It is parallel, make to form an annular groove between inner and outer wall；In the annular groove that resistance is arranged between inner walls and outer wall, electricity
There are test points on the surface of resistance.
Preferably, the material of the resistance uses copper-manganese or constantan.
Preferably, the shell cover is fixedly connected with shell by screw.
Preferably, there are instrument connections for the inner wall of the shell.
Preferably, the shell uses polytetrafluoroethylene material.
Preferably, the test point of the resistive surface is that there are the copper-manganese in rubber hole or constantan steel plates, in succession with electric resistance welding
It connects.
Preferably, the inner walls of the resistance shell and outer wall are rectangular, wherein outer wall dimension be 100mm ×
90mm, inner wall size are 70mm × 65mm.
Preferably, the resistance forms loop by the way of welding.
Above-mentioned at least one technical solution that the embodiment of the present application uses can reach following advantageous effect：Accuracy is high,
Uncertainty is only 0.1%；The light compact volume and convenience of the standard closed loop resistance device carries simultaneously, can be surveyed in laboratory and scene
Examination.
Description of the drawings
Attached drawing described herein is used for providing further understanding of the present application, constitutes part of this application, this Shen
Illustrative embodiments and their description please do not constitute the improper restriction to the application for explaining the application.
In the accompanying drawings：
Fig. 1 is a kind of away top view of standard closed loop resistance device of one embodiment of the invention；
Fig. 2 is a kind of shell vertical view of standard closed loop resistance device of one embodiment of the invention；
Fig. 3 is a kind of outer casing construction drawing of standard closed loop resistance device of one embodiment of the invention.
Specific implementation mode
To keep the purpose, technical scheme and advantage of the application clearer, below in conjunction with the application specific embodiment and
Technical scheme is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only the application one
Section Example, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not doing
Go out the every other embodiment obtained under the premise of creative work, shall fall in the protection scope of this application.
Fig. 1 is a kind of away top view of standard closed loop resistance device of one embodiment of the invention, and Fig. 2 is the present invention one
A kind of shell vertical view of standard closed loop resistance device of embodiment, Fig. 3 are a kind of standard closed loop electricity of one embodiment of the invention
Hinder the outer casing construction drawing of device.As shown in Figures 1 to 3, standard closed loop resistance device includes shell and resistance, and shell includes shell 5 and shell
Lid 4, shell cover are arranged above shell, and shell includes inner wall 3, outer wall 1 and bottom 9, inner and outer wall be both connected on bottom and
The two is parallel, therefore an annular groove 8 is formd between inner and outer wall；Resistance 2 is arranged between inner walls and outer wall
In annular groove, there are multiple test points, such as three test point positions to see A, B, C in figure on the surface of resistance.Preferably, adjacent two
Resistance length between a test point is identical.
The material of the wherein described resistance uses copper-manganese or constantan, welds to form loop using anti-oxidation scolding tin.The table of resistance
Face there are test point A, B, C be that they are uniform to be arranged on resistance, is connect with it there are the copper-manganese in rubber hole or constantan copper coin
Good and relative position is touched to fix.The method that anti-oxidation scolding tin welding is also chosen in the connection of test point and resistance.The shell
Inner walls are equipped with instrument connection 7, and instrument connection is corresponding with test point.The shell of shell is fixedly connected with shell cover by screw.
Between resistance is first fixed on the inner and outer wall of case body when assembling resistance, then the shell cover of shell covered above shell,
Shell and shell cover are fixed together by screw 6, and then resistance is made to fix inside the housing.
In one embodiment of the invention, the material selection polytetrafluoroethylene (PTFE) material of the standard closed loop resistance device shell
Material will not cause electromagnetic interference and firm be unlikely to deform through testting the material.The standard closed loop resistance device be equipped with 0.01 Ω,
0.05 Ω, 0.1 Ω, 0.2 Ω, 0.5 Ω, 1 Ω, 2 Ω, 5 Ω, 10 Ω, ten specifications.Wherein 0.01 Ω, 0.05 Ω, 0.1 Ω, 0.2
Ω, 0.5 Ω, 1 Ω resistance material use copper-manganese resistance wire, 2 Ω, 5 Ω, 10 Ω resistance material use constantan-made resistances silk.Electricity
Silk is hindered to choose resistivity, diameter and the suitable resistance wire of power according to resistance value and length come chosen material and can ensure that it can
It is fixed on the inside of standard closed loop resistance device shell.Standard closed loop resistance device resistance will pass through aging and examine three months simultaneously, sieve
Select the small resistance wire of the opposite variation of resistance value.
Standard closed loop resistance device provided by the invention carry out pincerlike earth resistance tester test in application, root first
Suitable standard closed loop resistance device resistance value is selected according to the range of pincerlike earth resistance tester, it can be by pincer ground connection electricity
Hinder the range covering of tester.Then pincerlike earth resistance tester is passed through into the survey of the standard closed loop resistance device inner walls
Prospect hole is connect with the test point being arranged on standard closed loop resistance device resistance.The numerical value that pincerlike earth resistance tester is shown is read,
And gradually replace standard closed loop resistance device reading numerical values.Refer to according to the technology of error calculation formula and pincerlike earth resistance tester
Mark, can determine whether it is qualified.
The material settling out that standard closed loop resistance device provided by the invention uses, accuracy is high, and uncertainty is only 0.1%；
The light compact volume and convenience of the standard closed loop resistance device carries simultaneously, can be tested in laboratory and scene.
Above is only an example of the present application, it is not intended to limit this application.For those skilled in the art
For, the application can have various modifications and variations.It is all within spirit herein and principle made by any modification, equivalent
Replace, improve etc., it should be included in the application.
Claims (8)
1. a kind of standard closed loop resistance device, which is characterized in that including shell and resistance, shell includes shell and shell cover, and shell cover is set
It sets above shell, shell includes inner wall, outer wall and bottom, and inner and outer wall is both connected on bottom and the two is parallel, is made interior
An annular groove is formed between wall and outer wall；In the annular groove that resistance is arranged between inner walls and outer wall, the surface of resistance
There are test points.
2. standard closed loop resistance device as described in claim 1, which is characterized in that the material of the resistance uses copper-manganese or health
Copper.
3. standard closed loop resistance device as described in claim 1, which is characterized in that the shell cover and shell are fixed by screw and connected
It connects.
4. standard closed loop resistance device as described in claim 1, which is characterized in that there are instrument connections for the inner wall of the shell.
5. standard closed loop resistance device as described in claim 1, which is characterized in that the shell uses polytetrafluoroethylene material.
6. standard closed loop resistance device as described in claim 1, which is characterized in that the test point of the resistive surface is that there are rubbers
The copper-manganese or constantan steel plate in glue hole, connect with resistance welding.
7. standard closed loop resistance device as described in claim 1, which is characterized in that the inner walls and outer wall of the resistance shell
It is rectangular, wherein outer wall dimension is 100mm × 90mm, and inner wall size is 70mm × 65mm.
8. standard closed loop resistance device as described in claim 1, which is characterized in that the resistance forms ring by the way of welding
Road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810224288.9A CN108627787B (en) | 2018-03-19 | 2018-03-19 | Standard closed-loop resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810224288.9A CN108627787B (en) | 2018-03-19 | 2018-03-19 | Standard closed-loop resistor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108627787A true CN108627787A (en) | 2018-10-09 |
| CN108627787B CN108627787B (en) | 2022-04-19 |
Family
ID=63706349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810224288.9A Active CN108627787B (en) | 2018-03-19 | 2018-03-19 | Standard closed-loop resistor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108627787B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2409286A (en) * | 2003-12-19 | 2005-06-22 | Advanced Analysis And Integrat | Loop resistance measurement and calibration standard |
| CN2896293Y (en) * | 2006-05-16 | 2007-05-02 | 符美安 | Pliers-shape earthing resistance instrument |
| CN201083822Y (en) * | 2007-08-10 | 2008-07-09 | 张今哲 | Loop resistance calibration ring |
-
2018
- 2018-03-19 CN CN201810224288.9A patent/CN108627787B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2409286A (en) * | 2003-12-19 | 2005-06-22 | Advanced Analysis And Integrat | Loop resistance measurement and calibration standard |
| CN2896293Y (en) * | 2006-05-16 | 2007-05-02 | 符美安 | Pliers-shape earthing resistance instrument |
| CN201083822Y (en) * | 2007-08-10 | 2008-07-09 | 张今哲 | Loop resistance calibration ring |
Non-Patent Citations (2)
| Title |
|---|
| 何碧芬等: ""钳形接地电阻测试仪校准方法探讨"", 《计量与测试技术》 * |
| 王龙: ""浅析电阻测试仪在杆塔电阻测试中的误区"", 《中国电力教育》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108627787B (en) | 2022-04-19 |
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