CN202119839U - Complete digital transformer dc resistance tester - Google Patents
Complete digital transformer dc resistance tester Download PDFInfo
- Publication number
- CN202119839U CN202119839U CN2011202287811U CN201120228781U CN202119839U CN 202119839 U CN202119839 U CN 202119839U CN 2011202287811 U CN2011202287811 U CN 2011202287811U CN 201120228781 U CN201120228781 U CN 201120228781U CN 202119839 U CN202119839 U CN 202119839U
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- chip microcomputer
- resistance
- voltage
- sampling module
- synchronic
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Abstract
The utility model relates to a complete digital transformer dc resistance tester, comprising a to-be-measured resistor, a constant current source module, a voltage current synchronic sampling module, a discharging circuit, a one-chip microcomputer and an LCD, wherein the to-be-measured resistor is serially connected in the discharging circuit, one end of the voltage current synchronic sampling module is connected with the to-be-measured resistor, the other end of the voltage current synchronic sampling module is connected with an input end of the one-chip microcomputer, and an output end of the one-chip microcomputer is connected with the LCD. The voltage current synchronic sampling module acquires voltage value and current value of the to-be-measured resistor and transmits the voltage value and the current value to the one-chip microcomputer, and the one-chip microcomputer calculates the resistance of the to-be-measured resistor and displays the resistance on the LCD. The complete digital transformer dc resistance tester is rapid and simple in operation, and solves the problem that on-site manual measuring is tedious and time consuming.
Description
Technical field
The utility model relates to electronic measurement technique, specifically refers to a kind of DCR of Transformer proving installation.
Background technology
DCR of Transformer be semi-manufacture in the transformer manufacturing, finished product delivery test, installation, commissioning test and power department preventive trial must survey project, can find effectively that the selection, welding, connecting portion of transformer coil is loosening, lack the hidden danger of manufacturing defect such as thigh, broken string and the existence of operation back.
Summary of the invention
The utility model aims to provide the digital DCR of Transformer tester that a kind of measuring accuracy is high, can digitizing show measurement result; In order to solve the problems of the technologies described above; The invention provides following technical scheme: a kind of digital DCR of Transformer tester, it is characterized in that, comprise testing resistance, constant current source module, electric current and voltage synchronized sampling module, discharge circuit, single-chip microcomputer, LCD; Described testing resistance is series at discharge loop; Electric current and voltage synchronous acquisition module one end links to each other with testing resistance, and the other end links to each other with the input end of single-chip microcomputer, and the single-chip microcomputer output terminal connects LCDs.
Further, the print-out device in addition that links to each other with the single-chip microcomputer output terminal.
A nearlyer step ground, the input end of single-chip microcomputer links to each other has input keyboard.
The beneficial effect of the utility model is: the utility model is gathered the voltage and current value of testing resistance by electric current and voltage synchronized sampling module; Send magnitude of voltage and current value to single-chip microcomputer, calculate the resistance of testing resistance and be presented on the LCDs by single-chip microcomputer.The utility model has been for the experimenter provides digital measurement mechanism simple to operate, solved on-site manual and measured problems such as loaded down with trivial details and length consuming time, provide a kind of use simply, proving installation fast.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of instructions, is used to explain the utility model with the embodiment of the utility model, does not constitute the restriction to the utility model.In the accompanying drawings:
Fig. 1 is the theory diagram of the utility model measurement mechanism.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for explanation and explains the present invention, and be not used in qualification the present invention.
Present embodiment is a central processing unit with the philipsP89C668 single-chip microcomputer, and μ C/OS-II is a real time operating system, forms an embedded system.Hardware components comprises testing resistance, constant current source module, electric current and voltage synchronized sampling module, discharge circuit, single-chip microcomputer, LCD, and software configuration adopts embedded real-time operating system.As development platform, adopt the C/C++ Programming with Pascal Language with keilc51, on the philipsP89C668 single-chip microcomputer with μ C/OS-II operating system transplantation to 8.Obtained the reliability of system.
The digital DCR of Transformer tester of the utility model has following function:
Measurement function: can measure the charging voltage and current of testing resistance, discharge current discharges and recharges the time;
Computing function: calculate the unbalance factor of alternate resistance, line resistance, resistance converts.
Regulation according in GB6451-86 " three-phase soaks formula power transformer technical parameter and the requirement " series standard must calculate the corresponding resistor unbalance factor according to measurement result.The resistance sizes temperature influence of Transformer Winding during measurement, should write down environment temperature (preferably measuring winding temperature) at that time.The transformer that does not have immersion oil, with room temperature as probe temperature.Immersion oil, with the pasta temperature as probe temperature.At last actual measured results is converted into the resistance under the standard temperature.
Presentation Function and keyboard operation: the result of LCDs display operation;
Memory function: can connect a storer at the output terminal of single-chip microcomputer, make the in-site measurement data can longer-term storage, inquiry at any time;
Printing function: can measurement result be printed with mini-printer;
Communication function: the communication of realization and PC;
System calibration: system is carried out real-time bias calibration, gain calibration through connect measuring resistance in load-side.Eliminate various errors, improve measuring accuracy;
To the time function: instrument internal adopts chargeable lithium cell and calendar clock chip, and time parameter can be made amendment, for final measurement provides basis of time.
Like table 1, be the technical indicator of this digital DCR of Transformer tester.
Table 1: the technical indicator of digital DCR of Transformer tester
Environment for use: environment temperature-20～70 ℃, relative humidity≤90%.
Working power: supply voltage is an alternating current 220V, allows fluctuation range 198V～240V.Frequency 50Hz,
Allow fluctuation range 48.5Hz～51.5Hz.
Instrument power consumption: less than 150W.
Physical dimension: 365mm * 265mm * 178mm
Instrument quality :≤10Kg
What should explain at last is: the above is merely the preferred embodiments of the present invention; Be not limited to the present invention; Although the present invention has been carried out detailed explanation with reference to previous embodiment; For a person skilled in the art, it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. digital DCR of Transformer tester; It is characterized in that; Comprise testing resistance, constant current source module, electric current and voltage synchronized sampling module, discharge circuit, single-chip microcomputer, LCD, described testing resistance is series at discharge loop, and electric current and voltage synchronous acquisition module one end links to each other with testing resistance; The other end links to each other with the input end of single-chip microcomputer, and the single-chip microcomputer output terminal connects LCDs.
2. digital DCR of Transformer tester according to claim 1 is characterized in that, the print-out device in addition that links to each other with the single-chip microcomputer output terminal.
3. digital DCR of Transformer tester according to claim 1 is characterized in that, what link to each other with the input end of single-chip microcomputer has an input keyboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202287811U CN202119839U (en) | 2011-06-30 | 2011-06-30 | Complete digital transformer dc resistance tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202287811U CN202119839U (en) | 2011-06-30 | 2011-06-30 | Complete digital transformer dc resistance tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202119839U true CN202119839U (en) | 2012-01-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202287811U Expired - Fee Related CN202119839U (en) | 2011-06-30 | 2011-06-30 | Complete digital transformer dc resistance tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202119839U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849563A (en) * | 2015-05-05 | 2015-08-19 | 国家电网公司 | Remote intelligent test device for loop resistance |
| CN104931786A (en) * | 2015-06-09 | 2015-09-23 | 苏州市华安普电力工程有限公司 | Tester for DC resistor |
| CN105403772A (en) * | 2015-10-30 | 2016-03-16 | 芜湖市振华戎科智能科技有限公司 | Transformer DC resistance testing device |
| CN106771620A (en) * | 2016-12-28 | 2017-05-31 | 国网河南省电力公司新乡供电公司 | A kind of DC resistance of power transformer comprehensive test analysis device |
| CN109507500A (en) * | 2018-11-08 | 2019-03-22 | 国家电网有限公司 | A kind of dedicated computing device for electrical test |
| CN111596132A (en) * | 2020-05-25 | 2020-08-28 | 广东电网有限责任公司东莞供电局 | DC resistance tester |
-
2011
- 2011-06-30 CN CN2011202287811U patent/CN202119839U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849563A (en) * | 2015-05-05 | 2015-08-19 | 国家电网公司 | Remote intelligent test device for loop resistance |
| CN104931786A (en) * | 2015-06-09 | 2015-09-23 | 苏州市华安普电力工程有限公司 | Tester for DC resistor |
| CN105403772A (en) * | 2015-10-30 | 2016-03-16 | 芜湖市振华戎科智能科技有限公司 | Transformer DC resistance testing device |
| CN106771620A (en) * | 2016-12-28 | 2017-05-31 | 国网河南省电力公司新乡供电公司 | A kind of DC resistance of power transformer comprehensive test analysis device |
| CN109507500A (en) * | 2018-11-08 | 2019-03-22 | 国家电网有限公司 | A kind of dedicated computing device for electrical test |
| CN111596132A (en) * | 2020-05-25 | 2020-08-28 | 广东电网有限责任公司东莞供电局 | DC resistance tester |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120118 Termination date: 20120630 |