CN201477160U - Automatic resistance box checking system - Google Patents
Automatic resistance box checking system Download PDFInfo
- Publication number
- CN201477160U CN201477160U CN2009201731441U CN200920173144U CN201477160U CN 201477160 U CN201477160 U CN 201477160U CN 2009201731441 U CN2009201731441 U CN 2009201731441U CN 200920173144 U CN200920173144 U CN 200920173144U CN 201477160 U CN201477160 U CN 201477160U
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- Prior art keywords
- resistance
- resistance box
- measuring apparatus
- voltage measuring
- checkout system
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- Expired - Lifetime
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- 238000012545 processing Methods 0.000 claims description 19
- 238000012360 testing method Methods 0.000 claims description 7
- 238000012795 verification Methods 0.000 claims description 7
- 238000013481 data capture Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
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Abstract
The utility model relates to an automatic resistance box checking system, which comprises a voltage measuring device, a current supplying device, a standard resistor group, a resistance box and a circuit switching control device, wherein the circuit switching control device is used for controlling one resistor of the standard resistor group to be connected to a loop; the voltage measuring device is controlled to be connected to either the resistor of the standard resistor group selected to be connected to the loop or a to-be-measured resistor on the resistance box; the current supplying device is in series connection with the circuit switching control device, the standard resistor and the to-be-measured resistor on the resistance box to form a closed loop; and the voltage measuring device is used for measuring voltage at two ends of the standard resistor connected to a circuit or measuring voltage at two ends of the to-be-measured resistor on the resistance box. The automatic resistance box checking system solves the problem that the prior art needs frequent circuit switching between the standard resistor and the to-be-checked resistance box, realizes automatic circuit switching, improves working conditions and enhances working efficiency.
Description
Technical field
The utility model relates to the resistance box calibration technology, relates in particular to a kind of resistance box automatic checkout system.
Background technology
At present, the calibrating of resistance box mainly depends on manual calibrating.Fig. 1 is the structured flowchart of existing resistance box automatic checkout system, as shown in Figure 1, existing resistance box check system by resistance box Rx, dc digital voltmeter, be built-in with one group of measuring resistance (R for example
1, R
2R
n) DC current source form.As shown in Figure 2, the DC current source synoptic diagram that is built-in with the measuring resistance group in the existing resistance box automatic checkout system.The circuit of existing resistance box check system is realized like this: 1) when connecting circuit, by manual wiring, with current source be built in certain resistance in the measuring resistance group of current source inside and the testing resistance of resistance box and connect to form the closed-loop path, digital voltmeter is connected the two ends of described measuring resistance, record voltage data, the counter circuit electric current; 2) holding current source output current is constant, and digital voltmeter is connected testing resistance two ends on the resistance box, records voltage data once more; 3) alternately repeat 1), 2) all testing resistances on resistance box are all measured.
The step of verification resistance box is as follows:
(1) output current of demarcation current source.According to the measuring disk that will examine and determine, select corresponding standard resistance, voltage table is connected on measuring resistance R
nCorresponding electric current I is exported at two ends, current source, reads voltage table indicating value U
nBy
Calculate the actual output current of current source.
(2) resistance of calibrating resistance box.The output current of current source is constant, and voltage table is connected on tested resistance box two ends, reads voltage table indicating value U
x, use operational formula
Calculate the actual value of tested resistance.
All resistance by step (1), (2) calibrating resistance box.
(3) result of calculation of each resistance is carried out the revision of the convention.
(4) calculate the relative error of each resistance.Each is coiled each resistance, by formula
Calculate relative error, wherein R is indicating value (nominal value), R
xBe actual value, σ is a relative error.The class of accuracy whether each resistance meets the place measuring disk is respectively coiled in judgement according to relative error.
(5) provide calibration certificate.With the verification result of all resistance of resistance box information, calibrating environmental baseline, resistance box etc. one by one in the typing certificate.
From above job step as seen, when resistance box is tested in calibration, use existing check system to need frequently to carry out circuit between measuring resistance and tested resistance box and switch, workload is very big, and the data operation and the revision of the convention are easy to cause mistake by manually finishing.In addition, employed measuring resistance is attached in the DC current source in being in the present verification system, and year less stable directly influences the reliability of verification result.
The utility model content
The purpose of this utility model proposes a kind of resistance box automatic checkout system, needs frequently to carry out the problem that circuit switches in the prior art in the verification process to solve between measuring resistance and tested resistance box.
Described resistance box automatic checkout system comprises: voltage measuring apparatus, electric current generator, measuring resistance group, resistance box, circuit switching control;
Wherein, described circuit switching control is used for controlling one of described measuring resistance group is inserted the loop, and control is connected to voltage measuring apparatus one in the measured resistance of selecting in the measuring resistance group to insert on resistance in circuit and the described resistance box;
Described electric current generator is connected with the measured resistance on the resistance box with circuit switching control, measuring resistance and is afterwards formed the closed-loop path;
Described voltage measuring apparatus is used for measuring the voltage at the two ends of the voltage of the described standard resistor at two terminals that is linked into circuit or the measured resistance on the described resistance box.
The beneficial effects of the utility model are, the resistance box automatic checkout system that the utility model provides has solved and frequently carried out the problem that circuit switches in the prior art between measuring resistance and tested resistance box, by using the resistance box automatic checkout system, realized the circuit automatic switchover, improved condition of work, increased work efficiency.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain his accompanying drawing of tool according to these accompanying drawings.
Fig. 1 is the structured flowchart of existing resistance box automatic checkout system;
Fig. 2 is the DC current source synoptic diagram that is built-in with the measuring resistance group in the existing resistance box automatic checkout system;
The structured flowchart of the resistance box automatic checkout system that Fig. 3 provides for the utility model embodiment;
The structural drawing of the resistance box automatic checkout system that Fig. 4 provides for the utility model embodiment;
The structured flowchart of the data processing equipment of the resistance box automatic checkout system that Fig. 5 provides for the utility model embodiment;
The structural drawing of the circuit switching device shifter of the resistance box automatic checkout system that Fig. 6 provides for the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
Embodiment
The structured flowchart of the resistance box automatic checkout system that Fig. 3 provides for the utility model embodiment.Described system comprises: voltage table, current source, measuring resistance, the resistance box that comprises a plurality of measured resistance Rx, circuit switching control.The circuit switching control is used for one of control criterion resistor group and inserts the loop, and control is connected to voltage measuring apparatus one in the measured resistance of selecting in the measuring resistance group to insert on resistance in circuit and the described resistance box; The electric current generator is connected with the measured resistance on the resistance box with circuit switching control, measuring resistance and is afterwards formed the closed-loop path; Voltage measuring apparatus is used for measuring the voltage at the two ends of the voltage of the described standard resistor at two terminals that is linked into circuit or the measured resistance on the described resistance box.
The structural drawing of the resistance box automatic checkout system that provides for the utility model embodiment as Fig. 4, Fig. 4 has increased data processing equipment on the basis of the embodiment that Fig. 3 provides, and the computing machine that shows among the described figure of being specially also can be other portable terminals, as PDA etc.Described electric current generator, described voltage measuring apparatus, described circuit switching device shifter link to each other with described data processing equipment respectively.For example, the interface between described voltage measuring apparatus and the described data processing equipment is general purpose interface bus interface (gpib interface); Interface between described current source and the described data processing equipment is the general purpose interface bus interface; Interface between described circuit switching device shifter and the described data processing equipment is a serial ports.Data processing equipment comprises as described in Figure 5: status unit 501 is used to control the open and-shut mode of voltage measuring apparatus and electric current generator; Selected cell 502 is used to select the work range of voltage measuring apparatus and electric current generator; Data capture unit 503 is used to obtain the data of described electric current generator, described voltage measuring apparatus; Data computation and processing unit 504 are used for drawing according to the data computation obtained the resistance, the resistance error that go up each testing resistance of resistance box.Described data processing equipment comprises that also report provides unit 505 (figure do not show), and the resistance, the resistance error that are used for according to each testing resistance of resistance box are provided the verification report.
Described data processing equipment is used to handle the data of described electric current generator, described voltage measuring apparatus.Above-mentioned total interface is the related interface of present embodiment, is not that in actual applications, those skilled in the art can select suitable interface for use as required in order to qualification the utility model.
Show as Fig. 6, for the circuit switching device shifter is connected circuit diagram in the system.Described circuit switching control comprises single-chip microcomputer, described single-chip microcomputer is used for controlling certain resistance access loop of choice criteria resistor group, and control this resistance and insert voltage measuring apparatus, described afterwards Single-chip Controlling inserts voltage measuring apparatus to the measured resistance on the selected pairing resistance box of resistance that is linked in the circuit.
The beneficial effect of the utility model embodiment is, the resistance box automatic checkout system that the utility model provides has solved and frequently carried out the problem that circuit switches in the prior art between measuring resistance and tested resistance box, by using the resistance box automatic checkout system, realized the circuit automatic switchover, improve condition of work, improved work efficiency.
Above embodiment; it is the preferred embodiment of the utility model; and be not in order to restriction the utility model, common variation that those skilled in the art carries out in the technical solution of the utility model and replacement all should be included within the protection domain of the present utility model.
Claims (7)
1. a resistance box automatic checkout system is characterized in that, described resistance box automatic checkout system comprises: voltage measuring apparatus, electric current generator, measuring resistance group, resistance box, circuit switching control;
Wherein, described circuit switching control is used for controlling one of described measuring resistance group is inserted the loop, and control is connected to voltage measuring apparatus one in the measured resistance of selecting in the measuring resistance group to insert on resistance in circuit and the described resistance box;
Described electric current generator is connected with the measured resistance on the resistance box with circuit switching control, measuring resistance and is afterwards formed the closed-loop path;
Described voltage measuring apparatus is used for measuring the voltage at the two ends of the voltage of the described standard resistor at two terminals that is linked into circuit or the measured resistance on the described resistance box.
2. resistance box automatic checkout system as claimed in claim 1, it is characterized in that, described circuit switching control comprises single-chip microcomputer, described single-chip microcomputer is used for controlling certain resistance access loop of choice criteria resistor group, and control this resistance and insert voltage measuring apparatus, described afterwards Single-chip Controlling inserts voltage measuring apparatus to the measured resistance on the selected pairing resistance box of resistance that is linked in the circuit.
3. resistance box automatic checkout system as claimed in claim 1, it is characterized in that, described resistance box automatic checkout system also comprises data processing equipment, and described electric current generator, described voltage measuring apparatus, described circuit switching device shifter link to each other with described data processing equipment respectively.
4. resistance box automatic checkout system as claimed in claim 1 is characterized in that, described data processing equipment comprises:
Status unit is used for: the open and-shut mode of control voltage measuring apparatus and electric current generator;
Selected cell is used to select the work range of voltage measuring apparatus and electric current generator;
Data capture unit is used to obtain the data of described electric current generator, described voltage measuring apparatus;
Data computation and processing unit are used for drawing according to the data computation obtained the resistance, the resistance error that go up each testing resistance of resistance box.
5. resistance box automatic checkout system as claimed in claim 4 is characterized in that, described data processing equipment also comprises: the unit is provided in report, is used for providing the verification report according to the resistance, the resistance error that go up each testing resistance of resistance box.
6. resistance box automatic checkout system as claimed in claim 1 is characterized in that,
Interface between described voltage measuring apparatus and the described data processing equipment comprises the general purpose interface bus interface;
Interface between described current source and the described data processing equipment comprises the general purpose interface bus interface;
Described circuit switching device shifter respectively and the interface between the described data processing equipment comprise serial ports.
7. resistance box automatic checkout system as claimed in claim 2 is characterized in that described data processing equipment comprises computing machine, portable terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201731441U CN201477160U (en) | 2009-08-24 | 2009-08-24 | Automatic resistance box checking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201731441U CN201477160U (en) | 2009-08-24 | 2009-08-24 | Automatic resistance box checking system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201477160U true CN201477160U (en) | 2010-05-19 |
Family
ID=42413413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201731441U Expired - Lifetime CN201477160U (en) | 2009-08-24 | 2009-08-24 | Automatic resistance box checking system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201477160U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102346243A (en) * | 2011-09-22 | 2012-02-08 | 湖南省电力公司科学研究院 | Intelligent resistance box for verification |
| CN102809739A (en) * | 2012-08-23 | 2012-12-05 | 四川电力科学研究院 | Method and device for checking storage battery internal resistance tester |
| CN104345179A (en) * | 2013-07-30 | 2015-02-11 | 上海山特姆电气有限公司 | Outdoor resistance box |
| CN105548660A (en) * | 2016-01-29 | 2016-05-04 | 美的集团武汉制冷设备有限公司 | Sampling resistance correction circuit, current detection circuit and driving circuit |
| CN105785303A (en) * | 2016-04-19 | 2016-07-20 | 国家电网公司 | Grounding ohmmeter calibrating device |
| CN108008193A (en) * | 2017-11-29 | 2018-05-08 | 北京东方计量测试研究所 | Combined type quantum Hall resistance sample ratio checker |
| CN108802481A (en) * | 2018-06-20 | 2018-11-13 | 国网安徽省电力有限公司滁州供电公司 | A kind of route survey device |
| CN111044961A (en) * | 2018-10-15 | 2020-04-21 | 吴茂祥 | Test machine self-checking system and test method |
| CN111693922A (en) * | 2020-08-04 | 2020-09-22 | 云南电力技术有限责任公司 | Automatic calibration system of impedance tester |
-
2009
- 2009-08-24 CN CN2009201731441U patent/CN201477160U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102346243A (en) * | 2011-09-22 | 2012-02-08 | 湖南省电力公司科学研究院 | Intelligent resistance box for verification |
| CN102346243B (en) * | 2011-09-22 | 2014-01-22 | 湖南省电力公司科学研究院 | Intelligent resistance box for verification |
| CN102809739A (en) * | 2012-08-23 | 2012-12-05 | 四川电力科学研究院 | Method and device for checking storage battery internal resistance tester |
| CN104345179A (en) * | 2013-07-30 | 2015-02-11 | 上海山特姆电气有限公司 | Outdoor resistance box |
| CN105548660A (en) * | 2016-01-29 | 2016-05-04 | 美的集团武汉制冷设备有限公司 | Sampling resistance correction circuit, current detection circuit and driving circuit |
| CN105785303A (en) * | 2016-04-19 | 2016-07-20 | 国家电网公司 | Grounding ohmmeter calibrating device |
| CN108008193A (en) * | 2017-11-29 | 2018-05-08 | 北京东方计量测试研究所 | Combined type quantum Hall resistance sample ratio checker |
| CN108008193B (en) * | 2017-11-29 | 2020-02-07 | 北京东方计量测试研究所 | Combined quantum Hall resistance sample proportion checker |
| CN108802481A (en) * | 2018-06-20 | 2018-11-13 | 国网安徽省电力有限公司滁州供电公司 | A kind of route survey device |
| CN108802481B (en) * | 2018-06-20 | 2024-03-19 | 国网安徽省电力有限公司滁州供电公司 | Line measuring device |
| CN111044961A (en) * | 2018-10-15 | 2020-04-21 | 吴茂祥 | Test machine self-checking system and test method |
| CN111693922A (en) * | 2020-08-04 | 2020-09-22 | 云南电力技术有限责任公司 | Automatic calibration system of impedance tester |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: NORTH CHINA POWER SCIENCE RESEARCH INST., CO., LTD Effective date: 20131104 Owner name: STATE ELECTRIC NET CROP. Free format text: FORMER OWNER: NORTH CHINA POWER SCIENCE RESEARCH INST., CO., LTD. Effective date: 20131104 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100045 XICHENG, BEIJING TO: 100031 XICHENG, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20131104 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: North China Electrical Power Research Institute LLC Address before: 100045 Beijing Fuxingmenwai Di Zang an Nan Xiang No. Patentee before: North China Electrical Power Research Institute LLC |
|
| CX01 | Expiry of patent term |
Granted publication date: 20100519 |
|
| CX01 | Expiry of patent term |