CN204359842U - A kind of computer based cable data tester - Google Patents
A kind of computer based cable data tester Download PDFInfo
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- CN204359842U CN204359842U CN201520016053.2U CN201520016053U CN204359842U CN 204359842 U CN204359842 U CN 204359842U CN 201520016053 U CN201520016053 U CN 201520016053U CN 204359842 U CN204359842 U CN 204359842U
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Abstract
The utility model relates to a kind of computer based cable data tester, and comprise the far-end acquisition module, signal transmission module, near-end receiver module and the computing machine that connect successively, described far-end acquisition module is connected with cable under test.Compared with prior art, the utility model has that reliability is high, easy to operate, accuracy advantages of higher.
Description
Technical field
The utility model relates to a kind of cable data tester, especially relates to a kind of computer based cable data tester.
Background technology
Along with social modernization, power cable uses more and more frequent in an electric power system and vast electricity consumption enterprise, and Just because of this, cable running safety is most important.And in the maintenance of daily cable, cable data test is the most substantially but is also one of test item of key, how to improve with the demand of applicable mobile maintenance, become problem important all the more.
Traditional cable data test, often relates to multiple analog meter, and not only wiring conversion is complicated, and needs the cooperation of multiple personnel to operate, and test record is on record after, sign in infosystem subsequently.In this process, both relate to the accuracy of instrument, and the Indirect Error that the operation of personnel brings, can not ignore.So, replace the digital sensing devices measuring gauge outfit and start to develop and apply.
Up-to-date digital cable parameter testing instrument, often based on the independent instrument of embedded development, can complete the test of every cable data, and automatically complete test report.Thus, digitized development simplifies measuring process, and improves the reliability of test.
But along with informationalized needs, new requirement is proposed to cable data tester, require that instrument itself needs to provide the express passway of information.Based on this, computer based cable data tester is just applied and gives birth to.But consider rig-site utilization environmental complexity, the convenience of instrument needs and computing machine connected applications, like this could realistic demand.
Utility model content
The purpose of this utility model be exactly in order to overcome above-mentioned prior art exist defect and the computer based cable data tester that a kind of reliability is high, easy to operate, accuracy is high is provided.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of computer based cable data tester, it is characterized in that, comprise the far-end acquisition module, signal transmission module, near-end receiver module and the computing machine that connect successively, described far-end acquisition module is connected with cable under test.
Described far-end acquisition module comprises a FPGA, current acquisition unit, voltage acquisition unit, AD conversion unit, the first storage unit and the first communication unit, a described FPGA is connected with AD conversion unit, the first storage unit and the first communication unit respectively, and described current acquisition unit, voltage acquisition unit are connected with AD conversion unit respectively.
Described current acquisition unit comprises the current transformer and the first programmable amplifying circuit that connect successively, and the first described programmable amplifying circuit is connected with AD conversion unit.
Described current transformer comprises the external current transformer and built-in current mutual inductor that connect successively, and described external current transformer is connected with cable under test, and described built-in current mutual inductor is connected with the first programmable amplifying circuit.
Described voltage acquisition unit comprises the voltage transformer (VT) and the second programmable amplifying circuit that connect successively, and the second described programmable amplifying circuit is connected with AD conversion unit.
Described signal transmission module is optical fiber.
Described near-end receiver module comprises the 2nd FPGA, second communication unit, the second storage unit and USB interface, and the 2nd described FPGA is connected with second communication unit, the second storage unit and USB interface respectively.
The first described communication unit and second communication unit are fiber optical transceiver.
The first described storage unit and the second storage unit are SRAM.
Compared with prior art, the utility model has the following advantages:
1, adopt Distributed Design, comprise far-end acquisition module, fiber medium, near-end receiver module and computing machine ingredient;
2, employ the synchronous signal acquisition technology based on FPGA, sampled voltage and current signal, utilize digital filtering, provides filtered noise function flexibly; Utilize the phase calculation function based on FFT technology, the calculating of useful power is provided;
3, adopt optical fiber transmission technique, ensure that the high reliability of high pressure and area of safety operaton is isolated.
4, adopt virtual instrument technique, make instrument have overall treatment function, comprise the functions such as data analysis, report generation and network remote monitoring.
5, owing to adopting virtual instrument technique, make, by traditional analog or digital treatment technology, to turn to computer based Digital Signal Processing; Due to the fast development of Digital Signal Processing, this instrument is made to have the vitality of sustainable development.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is far-end acquisition module structural representation;
Fig. 3 is near-end receiver module structural representation.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
Embodiment
As shown in Figure 1, a kind of computer based cable data tester, comprise the far-end acquisition module 1, signal transmission module 2, near-end receiver module 3 and the computing machine 4 that connect successively, described far-end acquisition module 1 is connected with cable under test 5.
As shown in Figure 2, described far-end acquisition module 1 comprises a FPGA11, current acquisition unit, voltage acquisition unit, AD conversion unit 16, first storage unit 17 and the first communication unit 18, a described FPGA11 is connected with AD conversion unit 16, first storage unit 17 and the first communication unit 18 respectively, and described current acquisition unit, voltage acquisition unit are connected with AD conversion unit 16 respectively.Described current acquisition unit comprises the current transformer and the first programmable amplifying circuit 13 that connect successively, and the first described programmable amplifying circuit 13 is connected with AD conversion unit 16 and a FPGA11 respectively.Described current transformer comprises the external current transformer 19 and built-in current mutual inductor 12 that connect successively, and described external current transformer 19 is connected with cable under test 5, and described built-in current mutual inductor 12 is connected with the first programmable amplifying circuit 13.Described voltage acquisition unit comprises the voltage transformer (VT) 14 and the second programmable amplifying circuit 15 that connect successively, and the second described programmable amplifying circuit 15 is connected with AD conversion unit 16 and a FPGA11 respectively.
Described signal transmission module is optical fiber.
Described near-end receiver module 3 comprises the 2nd FPGA31, second communication unit 32, second storage unit 33 and USB interface 34, and the 2nd described FPGA31 is connected with second communication unit 32, second storage unit 33 and USB interface 34 respectively.The first described communication unit 18 and second communication unit 32 are fiber optical transceiver.The first described storage unit 17 and the second storage unit 33 are SRAM.
Wherein external current transformer is 0-200A/5A, and voltage transformer (VT) is 0-380V, and built-in current mutual inductor is 0-5A, and programmable amplifying circuit is 1 times, 10 times, 100 times, and AD conversion unit is 16 250KS/s.After the required voltage and current signal tested of cable entered sensor and relevant conditioning, access AD conversion unit simultaneously, after FPGA high-speed sampling control stored in SRAM after, send to near-end receiver module to receive host computer order by high speed fibre simultaneously, carry out relevant gear switch and programming amplifying action.
Receiving far-end samples after the fiber-optic signal that transmits, stored in SRAM after decoding, and by USB, electric current and voltage is transferred to computing machine and goes further process.
The utility model adopts the LabVIEW development platform based on American National instrument, and design comprises the test functions such as electric capacity, positive sequence impedance, zero sequence impedance.Test interface comprises the functions such as voltage display, electric current display, power display, positive sequence impedance, AC resistance and forward-sequence reactance, and voltage current waveform display.
Claims (9)
1. a computer based cable data tester, is characterized in that, comprise the far-end acquisition module, signal transmission module, near-end receiver module and the computing machine that connect successively, described far-end acquisition module is connected with cable under test.
2. a kind of computer based cable data tester according to claim 1, it is characterized in that, described far-end acquisition module comprises a FPGA, current acquisition unit, voltage acquisition unit, AD conversion unit, the first storage unit and the first communication unit, a described FPGA is connected with AD conversion unit, the first storage unit and the first communication unit respectively, and described current acquisition unit, voltage acquisition unit are connected with AD conversion unit respectively.
3. a kind of computer based cable data tester according to claim 2, it is characterized in that, described current acquisition unit comprises the current transformer and the first programmable amplifying circuit that connect successively, and the first described programmable amplifying circuit is connected with AD conversion unit.
4. a kind of computer based cable data tester according to claim 3, it is characterized in that, described current transformer comprises the external current transformer and built-in current mutual inductor that connect successively, described external current transformer is connected with cable under test, and described built-in current mutual inductor is connected with the first programmable amplifying circuit.
5. a kind of computer based cable data tester according to claim 2, it is characterized in that, described voltage acquisition unit comprises the voltage transformer (VT) and the second programmable amplifying circuit that connect successively, and the second described programmable amplifying circuit is connected with AD conversion unit.
6. a kind of computer based cable data tester according to claim 2, it is characterized in that, described signal transmission module is optical fiber.
7. a kind of computer based cable data tester according to claim 6, it is characterized in that, described near-end receiver module comprises the 2nd FPGA, second communication unit, the second storage unit and USB interface, and the 2nd described FPGA is connected with second communication unit, the second storage unit and USB interface respectively.
8. a kind of computer based cable data tester according to claim 7, it is characterized in that, the first described communication unit and second communication unit are fiber optical transceiver.
9. a kind of computer based cable data tester according to claim 7, it is characterized in that, the first described storage unit and the second storage unit are SRAM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520016053.2U CN204359842U (en) | 2015-01-09 | 2015-01-09 | A kind of computer based cable data tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520016053.2U CN204359842U (en) | 2015-01-09 | 2015-01-09 | A kind of computer based cable data tester |
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| CN204359842U true CN204359842U (en) | 2015-05-27 |
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| CN201520016053.2U Active CN204359842U (en) | 2015-01-09 | 2015-01-09 | A kind of computer based cable data tester |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105607031A (en) * | 2016-03-23 | 2016-05-25 | 国网四川省电力公司电力科学研究院 | High-voltage electric energy meter calibrating device |
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2015
- 2015-01-09 CN CN201520016053.2U patent/CN204359842U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105607031A (en) * | 2016-03-23 | 2016-05-25 | 国网四川省电力公司电力科学研究院 | High-voltage electric energy meter calibrating device |
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