CN104101758B - Voltage measuring instrument - Google Patents
Voltage measuring instrument Download PDFInfo
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- CN104101758B CN104101758B CN201410363542.5A CN201410363542A CN104101758B CN 104101758 B CN104101758 B CN 104101758B CN 201410363542 A CN201410363542 A CN 201410363542A CN 104101758 B CN104101758 B CN 104101758B
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- measuring plate
- resistance
- replacement disk
- contact
- disk
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- 239000002184 metal Substances 0.000 claims description 25
- 229910052751 metal Inorganic materials 0.000 claims description 25
- 239000000203 mixture Substances 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- NEIHULKJZQTQKJ-UHFFFAOYSA-N [Cu].[Ag] Chemical compound [Cu].[Ag] NEIHULKJZQTQKJ-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
Provided is a voltage measuring instrument for direct current voltage measurement. Six stepping panels are provided. Each stepping panel is composed of a measuring panel and a replacing panel identical in structure with the measuring panel. A 1omega resistor is welded between adjacent contacts of the measuring panels and the replacing panels of first two stepping panels respectively, and contacts of the measuring panels and the replacing panels of last three stepping panels are connected with corresponding contacts of the measuring panel and the replacing panel of a third stepping panel, so that effects of switch contact resistance, variation and thermal electromotive force of the voltage measuring instrument on the voltage measuring instrument are small.
Description
Technical field
The present invention relates to the instrument that DC voltage is measured.
Background technology
Currently for the voltage-measuring equipment having five step discs, in the connection between five step discs, telophragma is general
All over using switch currently for the voltage measuring apparatus having multiple step discs, in the connection between multiple step discs, telophragma
Commonly used switch switching, thus produces the variation of contact resistance, brings restriction to resolution ratio.In order to overcome this problem, one
As adopt big brush to increase contact area, and adopt silver-copper composite；Application number 200510062236.9,
The voltage measuring apparatus that the patents of invention such as 200810121910.x disclose multiple step discs solve switch contact resistance variation
New method, its multiple step discs are all made up of Measuring plate and replacement disk, and each Measuring plate and replacement disk have resistance, it
Multiple step discs on Measuring plate and replacement disk constitute bridge circuit in circuit, the defect of its maximum is error not only
Vertical, once Measuring plate point indicating value is overproof, just cannot determine which resistance is overproof and cause, this is to identifying and maintenance brings not
Just.
Content of the invention
The purpose of the present invention is to design a kind of voltage-measuring equipment having six step discs, and it does not adopt bridge circuit, this
Sample error can be independent, and does not have resistance between rear three step disc contacts, and this can reduce equipment instrument with reduces cost.
Technical scheme is so taken: voltage-measuring equipment external work between 2.2～3v from adjustable range
Make power supply e positive pole terminal through the adjustable resistance r being made up of 20 5 ω resistant seriesp1, be made up of 21 0.25 ω resistant series
Adjustable resistance rp2, and adjustable resistance r between 0～0.26 ω for the adjustable rangep3, through six step discs, to 101.8 ω
Set up resistance rn, then the adjustable resistance r through 0～0.2 ω lockable sliding contactp4Return to adjustable range between 2.2～3v
External working power e negative pole terminal composition voltage-measuring equipment performance loop；From unsaturated standard cell enPositive pole is through two
Double-point double-throw switch k to 101.8 ω being connected to galvanometer g between individual normally-closed contact sets up resistance rnWith adjustable range 0～0.2
The adjustable resistance r of lockable sliding contact between ωp4, then through 200k ω resistance r0To unsaturated standard cell enNegative pole forms
Voltage-measuring equipment standard loop；For connecting measured " ux" two terminals, positive pole terminal after six Measuring plates, then
The double-point double-throw switch k being connected to galvanometer g between two normally-closed contacts compensates to negative pole terminal composition voltage-measuring equipment
Loop；It is characterized in that the first step disc by having 0,1,2 ... 10 Measuring plate i of totally 11 gears with have 0,1,2 ... 10
1 ω resistance one is welded between the upper each two adjacent contacts of the replacement disk i ' composition of totally 11 gears, Measuring plate i and replacement disk i ',
Second step disc is by having 0,1,2 ... 10 Measuring plate ii of totally 11 gears with have 0,1,2 ... the generation of 10 totally 11 gears
Change disk ii ' composition, between Measuring plate ii and the upper each two adjacent contacts of replacement disk ii ', weld 1 ω resistance one, the 3rd step disc by
Have 0,1,2 ... 10 Measuring plate iii of totally 11 gears with have 0,1,2 ... the replacement disk iii ' group of 10 totally 11 gears
Become, between the upper each two adjacent contacts of Measuring plate iii and replacement disk iii ', weld 0.1111 ω resistance one, the of Measuring plate iii
" 0 " contact is circuit node a, and " 10th " contact of replacement disk iii ' is circuit node b, the 4th step disc is by having 0,1,2 ...
10 Measuring plate iv of totally 11 gears with by 0,1,2 ... the replacement disk iv ' of 10 totally 11 gears forms, the 5th step disc by
By 0,1,2 ... 10 Measuring plate v of totally 11 gears with by 0,1,2 ... the replacement disk v ' of 10 totally 11 gears forms,
Six step discs are by having 0,1,2 ... 10 Measuring plate vi of totally 11 gears with have 0,1,2 ... the replacement of 10 totally 11 gears
Disk vi ' composition, Measuring plate v and generation in each contact on Measuring plate iv and replacement disk iv ' in the 4th step disc, the 5th step disc
Change each contact on disk v ', in each contact in Measuring plate vi and replacement disk vi ' in the 6th step disc and the 3rd step disc
Measuring plate iii contact portion corresponding with replacement disk iii ', metal contact ring and the replacement disk iii ' of the 3rd step disc Measuring plate iii
Metal contact the interannular resistance r of 998.89 ω1Connect, metal contact ring and the replacement disk of the 4th step disc Measuring plate iv
The metal of iv ' contacts the resistance r of interannular 9999 ω2Connect, metal contact ring and the replacement disk v ' of the 5th step disc Measuring plate v
Metal contact the interannular resistance r of 100k ω3Connect, metal contact ring and the replacement disk vi ' of the 6th step disc Measuring plate vi
Metal contact the interannular resistance r of 1000k ω4Brush on connection, the brush in each step disc Measuring plate and replacement disk
Synchronous during rotation, " 0th " contact of Measuring plate iii is " 0th " contact that node a connects Measuring plate ii, the metal of Measuring plate ii
Contact ring connects the metal contact ring of Measuring plate i, and " 10th " contact of replacement disk iii ' is that node b connects replacement disk ii '
" 10 " contact, the metal of replacement disk ii ' contacts the resistance r through 79.91 ω for the ring5Connect the metal contact ring of replacement disk i ', survey
100 ω resistance r are passed through in " 10th " contact of amount disk i6Connect " 0th " contact of replacement disk i ', " 10th " contact of replacement disk i '
Connect 101.8 ω and set up resistance rnHot end, " 0th " contact portion adjustable resistance r of Measuring plate ip3Cold end, for even
Meet measured " ux" two measurement terminals, " 0th " contact portion of positive pole terminal and Measuring plate i, negative pole terminal is through two
It is connected to " 10th " contact portion with Measuring plate iii after the double-point double-throw switch k of galvanometer g between normally-closed contact.
By above technical scheme, first, second, third step disc construction of switch is identical, and resistance is identical, and the
4th, all there is no resistance between the five, the 6th step disc contacts, this is given to produce and is brought convenience with maintenance, so that voltage-measuring equipment is tied yet
Structure is simple, and volume-diminished, thus reduce production cost.
Brief description
Fig. 1 is a kind of schematic circuit of the present invention.
Specific embodiment
In FIG, the adjustable resistance r of 20 × 5 ωp1, represent adjustable resistance rp1On have the resistance string that 20 resistances are 5 ω
Connection, in the same manner, the adjustable resistance r of 21 × 0.25 ωp2, represent adjustable resistance rp2On have the resistant series that 21 resistances are 0.25 ω,
10 × 1 ω on first step disc, the second step disc, represent there is, on Measuring plate and replacement disk, the resistance that 10 resistances are 1 ω
Series connection, in FIG, on step disc, heavy black bar represents metal contact ring, and hollow small circle represents hard contact, four-headed arrow table
Show metallic brush.
In FIG, the resistance that the every stepping of first, second, third step disc Measuring plate increases subtracts equal to the every stepping of replacement disk
Few resistance, so Measuring plate is in rotation process, circuit always hinders constant；Appoint in three step discs between node a, node b
When one step disc of meaning rotates, the resistance that electric current flows through Measuring plate increase flows through, equal to electric current, the resistance that replacement disk reduces, otherwise
Also right, so, no matter what indicating value rear three step discs put, this step disc resistance value between node a and node b is constant, this energy
No matter ensureing what indicating value rear three step discs put, each step disc resistance ratio is basically unchanged, and also ensures to flow through the electricity of each step disc
Stream is basically unchanged.
Voltage-measuring equipment standard operating current is designed to 10ma, the brush of the first step disc Measuring plate i and replacement disk i '
Brush between through 100 ω resistance r6Resistance be 110 ω, the brush of the first step disc Measuring plate i and replacement disk i's '
Between brush, the resistance through node a, node b is 990 ω, so there being 9ma current flowing resistance r6, have 1ma electric current to flow through
Node a to node b.
Voltage-measuring equipment 1ma operating current is divided into four tunnels a: road measured disk iii after node a, and a road is passed through
Measuring plate iv, a road measured disk v, a road measured disk vi, four tunnel current remittances are together in node b；Between node a, node b
Each branch resistance ratio: the 6th step disc: the 5th step disc: the 4th stepping: the 3rd step disc=1000: 100: 10: 1, so, stream
Crossing each branch current ratio between node a, node b is: the 6th step disc: the 5th step disc: the 4th stepping: the 3rd step disc=1st:
10: 100: 1000, the double-point double-throw switch k being connected to galvanometer g between two normally-closed contacts puts when the left side, pressure measuring instrument
Device 1ma electric current all flows through some resistance in Measuring plate iii, and this resistance is connecting measured " ux" two measurement terminals
Between display magnitude of voltage be 0.1111mv, the 3rd step disc contribution magnitude of voltage be 1 × 10-1Mv, the electricity of the 4th step disc contribution
Pressure value is 1 × 10-2Mv, the magnitude of voltage of the 5th step disc contribution is 1 × 10-3Mv, the magnitude of voltage of the 6th step disc contribution is 1 ×
10-4Mv, therefore, each stepping of the first step disc is 10mv, and each stepping of the second step disc is 1mv, the 3rd step disc each
Stepping is 0.1mv, and the 4th each stepping of step disc is 0.01mv, and the 5th each stepping of step disc is 0.001mv, the 6th step
Entering each stepping of disk is 0.1 μ v.
Voltage-measuring equipment working power will adopt yj49 type high stability adjustable stabilized voltage supply, adjustable resistance rp1, adjustable
Resistance rp2, adjustable resistance rp3For adjustment work electric current, adjustable resistance rp3All the resistance value of adjustable range is more than adjustable resistance
rp2A step value, adjustable resistance rp2All the resistance value of adjustable range is more than adjustable resistance rp1A step value, as long as
Yj49 type high stability adjustable stabilized voltage supply output voltage is adjusted between 2.2～3v it is possible to convenience is adjustable by adjusting
Resistance rp1, adjustable resistance rp2, adjustable resistance rp3Voltage-measuring equipment operating current is adjusted to standard state.
The standard operating current of voltage-measuring equipment is obtained by: 100mv standard signal voltage by polarity and voltage
Measuring instrument " ux" two measurement terminals connect, the total indicating value of each step disc of voltage-measuring equipment is identical with standard signal magnitude of voltage,
Double-point double-throw switch k throws to the left side, adjusts adjustable resistance rp1, adjustable resistance rp2And adjustable resistance rp3, make galvanometer g nulling；Again
Double-point double-throw switch k is thrown to the right, adjusts adjustable resistance rp4, make galvanometer g nulling, after repeating once, adjustable resistance
rp4Locking, at this moment the operating current of voltage-measuring equipment just standardizes, and when instrument uses, first proofreads standard, reading dial is entered
During row reading, reading again after check and correction standard.In standard loop, for avoiding loop current excessive, using 200k ω resistance r0Come
Current limliting, because the electromotive force of unsaturated standard cell is discrete, between 1.0188v～1.0196v, standardized work electricity
Flow for 10ma, therefore setting resistance rnTake 101.8 ω, the lockable adjustable resistance r of additional 0～0.2 ωp4, can be with coverage criteria
The excursion of cell emf.
Claims (1)
1. a kind of voltage-measuring equipment, voltage-measuring equipment external working power e positive pole between 2.2～3v from adjustable range
Terminal is through the adjustable resistance r being made up of 20 5 ω resistant seriesp1, the adjustable resistance that is made up of 21 0.25 ω resistant series
rp2, and adjustable resistance r between 0～0.26 ω for the adjustable rangep3, through six step discs, set up resistance r to 101.8 ωn,
Again through the adjustable resistance r of 0～0.2 ω lockable sliding contactp4Return to external work electricity between 2.2～3v for the adjustable range
Source e negative pole terminal composition voltage-measuring equipment performance loop；From unsaturated standard cell enPositive pole through two normally-closed contacts it
Between be connected to galvanometer g double-point double-throw switch k to 101.8 ω set up resistance rnAnd adjustable range lockable between 0～0.2 ω
The adjustable resistance r of sliding contactp4, then through 200k ω resistance r0To unsaturated standard cell enNegative pole forms voltage-measuring equipment
Standard loop；For connecting measured " ux" two terminals, positive pole terminal is after six Measuring plates more normally closed through two
The double-point double-throw switch k being connected to galvanometer g between contact compensates loop to negative pole terminal composition voltage-measuring equipment；Its feature exists
In the first step disc by having 0,1,2 ... 10 Measuring plate i of totally 11 gears with have 0,1,2 ... the generation of 10 totally 11 gears
Change disk i ' composition, between Measuring plate i and the upper each two adjacent contacts of replacement disk i ', weld 1 ω resistance one, the second step disc is by having
0th, 1,2 ... 10 Measuring plate ii of totally 11 gears with by 0,1,2 ... the replacement disk ii ' of 10 totally 11 gears forms, and surveys
Weld 1 ω resistance one between the upper each two adjacent contacts of amount disk ii and replacement disk ii ', the 3rd step disc is by having 0,1,2 ... 10
Measuring plate iii of totally 11 gears with by 0,1,2 ... the replacement disk iii ' of 10 totally 11 gears forms, Measuring plate iii and generation
Change and between the upper each two adjacent contacts of disk iii ', weld 0.1111 ω resistance one, " 0th " contact of Measuring plate iii is circuit node
" 10th " contact of a, replacement disk iii ' is circuit node b, the 4th step disc is by having 0,1,2 ... the survey of 10 totally 11 gears
Amount disk iv with by 0,1,2 ... the replacement disk iv ' of 10 totally 11 gears forms, the 5th step disc is by having 0,1,2 ... 10 altogether
Measuring plate v of 11 gears with by 0,1,2 ... the replacement disk v ' of 10 totally 11 gears forms, the 6th step disc is by having 0,1,
2nd ... 10 Measuring plate vi of totally 11 gears with by 0,1,2 ... the replacement disk vi ' of 10 totally 11 gears forms, the 4th step
Enter each contact in Measuring plate iv and replacement disk iv ' in disk, each in Measuring plate v and replacement disk v ' in the 5th step disc tactile
Each contact in Measuring plate vi and replacement disk vi ' in point, the 6th step disc and Measuring plate iii and replacement disk in the 3rd step disc
Iii ' corresponds to contact portion, and the metal contact ring of the 3rd step disc Measuring plate iii is contacted interannular and uses with the metal of replacement disk iii '
998.89 the resistance r of ω1Connect, the metal contact ring of the 4th step disc Measuring plate iv contacts interannular with the metal of replacement disk iv '
Resistance r with 9999 ω2Connect, the metal contact ring of the 5th step disc Measuring plate v is contacted interannular and uses with the metal of replacement disk v '
The resistance r of 100k ω3Connect, the metal contact ring of the 6th step disc Measuring plate vi is contacted interannular and uses with the metal of replacement disk vi '
The resistance r of 1000k ω4Connect, the brush in each step disc Measuring plate and the brush on replacement disk are synchronous when rotating, Measuring plate
" 0th " contact of iii is " 0th " contact that node a connects Measuring plate ii, and the metal contact ring of Measuring plate ii connects Measuring plate i
Metal contact ring, " 10th " contact of replacement disk iii ' is " 10th " contact that node b connects replacement disk ii ', replacement disk ii '
Metal contact ring through 79.91 ω resistance r5Connect the metal contact ring of replacement disk i ', " 10th " contact of Measuring plate i leads to
Cross 100 ω resistance r6Connect " 0th " contact of replacement disk i ', " 10th " contact portion 101.8 ω of replacement disk i ' sets up resistance rn
Hot end, " 0th " contact portion adjustable resistance r of Measuring plate ip3Cold end, for connecting measured " ux" two survey
Amount terminal, " 0th " contact portion of positive pole terminal and Measuring plate i, negative pole terminal is connected to inspection stream between two normally-closed contacts
" 10th " contact portion with Measuring plate iii after the double-point double-throw switch k of meter g；Described working power e adopts yj49 type high stable
Degree adjustable stabilized voltage supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410363542.5A CN104101758B (en) | 2014-07-24 | 2014-07-24 | Voltage measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410363542.5A CN104101758B (en) | 2014-07-24 | 2014-07-24 | Voltage measuring instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104101758A CN104101758A (en) | 2014-10-15 |
| CN104101758B true CN104101758B (en) | 2017-01-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410363542.5A Active CN104101758B (en) | 2014-07-24 | 2014-07-24 | Voltage measuring instrument |
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| CN2816821Y (en) * | 2005-04-22 | 2006-09-13 | 骆乃光 | Potentiometer for measuring micro voltage |
| CN101776704A (en) * | 2009-12-30 | 2010-07-14 | 富阳精密仪器厂 | Voltage-measuring device with four measuring panels |
| CN101776705A (en) * | 2009-12-30 | 2010-07-14 | 骆洪亮 | Potentiometer with four step plates |
| CN201569684U (en) * | 2009-12-30 | 2010-09-01 | 程军 | Voltage measuring device with four meter panels |
| CN201576040U (en) * | 2009-12-30 | 2010-09-08 | 方宁妹 | Potential difference meter |
| CN204044219U (en) * | 2014-07-24 | 2014-12-24 | 骆孝峰 | Voltage-measuring equipment |
-
2014
- 2014-07-24 CN CN201410363542.5A patent/CN104101758B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1673753A (en) * | 2005-04-22 | 2005-09-28 | 骆乃光 | Portable potential difference meter with high resolution ratio |
| CN2816821Y (en) * | 2005-04-22 | 2006-09-13 | 骆乃光 | Potentiometer for measuring micro voltage |
| CN101776704A (en) * | 2009-12-30 | 2010-07-14 | 富阳精密仪器厂 | Voltage-measuring device with four measuring panels |
| CN101776705A (en) * | 2009-12-30 | 2010-07-14 | 骆洪亮 | Potentiometer with four step plates |
| CN201569684U (en) * | 2009-12-30 | 2010-09-01 | 程军 | Voltage measuring device with four meter panels |
| CN201576040U (en) * | 2009-12-30 | 2010-09-08 | 方宁妹 | Potential difference meter |
| CN204044219U (en) * | 2014-07-24 | 2014-12-24 | 骆孝峰 | Voltage-measuring equipment |
Non-Patent Citations (1)
| Title |
|---|
| 电位差计实验仪器匹配与控制电路的设计思考;左卫群;《桂林电子工业学院学报》;20040831;第24卷(第4期);第47-49、78页 * |
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| Publication number | Publication date |
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| CN104101758A (en) | 2014-10-15 |
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Effective date of registration: 20190130 Address after: 102600 3 floor, 2 building, No. 4 Daxing District Garden Road, Beijing, 1 unit 317 Patentee after: BEIJING ZHITOUJIA INTELLECTUAL PROPERTY OPERATION CO.,LTD. Address before: 311404 No. 33 Tingshan Road, Dayuan Town, Fuyang City, Hangzhou City, Zhejiang Province Patentee before: FUYANG XINGYUAN INSTRUMENTS BUSINESS DEPARTMENT |
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Effective date of registration: 20191125 Address after: Room 602, building H2, Changyuan road international enterprise community, Wuqing Development Zone, Wuqing District, Tianjin Patentee after: TIANJIN LEISHENG TECHNOLOGY Co.,Ltd. Address before: 102600 Unit 317, Unit 1, Building 3, No. 2, Yueyuan Road, Daxing District, Beijing Patentee before: BEIJING ZHITOUJIA INTELLECTUAL PROPERTY OPERATION CO.,LTD. |
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Effective date of registration: 20201102 Address after: No.99, Dongbao Road, Jiangdong Street, Gulou District, Nanjing, Jiangsu Province, 210000 Patentee after: Chai Fenfen Address before: Room 602, building H2, Changyuan road international enterprise community, Wuqing Development Zone, Wuqing District, Tianjin Patentee before: TIANJIN LEISHENG TECHNOLOGY Co.,Ltd. |
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Address after: 241000 No.3, exi Road, Sanshan Economic Development Zone, Wuhu City, Anhui Province Patentee after: Chai Fenfen Address before: No.99, Dongbao Road, Jiangdong Street, Gulou District, Nanjing, Jiangsu Province, 210000 Patentee before: Chai Fenfen |
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Effective date of registration: 20221028 Address after: 252000 room b2202, Xingguang Chuangye building, Dongchang East Road, Liaocheng Economic and Technological Development Zone, Shandong Province Patentee after: Shandong Changda Automation Technology Co.,Ltd. Address before: 241000 No.3, exi Road, Sanshan Economic Development Zone, Wuhu City, Anhui Province Patentee before: Chai Fenfen |