CN201312312Y - Low voltage power cord carrier communication test system - Google Patents
Low voltage power cord carrier communication test system Download PDFInfo
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- CN201312312Y CN201312312Y CNU2008201612645U CN200820161264U CN201312312Y CN 201312312 Y CN201312312 Y CN 201312312Y CN U2008201612645 U CNU2008201612645 U CN U2008201612645U CN 200820161264 U CN200820161264 U CN 200820161264U CN 201312312 Y CN201312312 Y CN 201312312Y
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Abstract
The utility model relates to a low voltage power cord carrier communication test system comprising a carrier transmitter, a program control attenuation device, a tested carrier receive device, an artificial power network, a frequency spectrograph receiver, a computer, a frequency spectrograph, a noise simulator, a resistance simulator and a purifying power supply. The utility model has the advantages that the low voltage power cord carrier communication test system provides a comparable test platform for carrier communication product and has wide application range on carrier wave; the artificial power network parameter model has high standardized degree, and the test data is comparable; the test is processed by changing the channel parameters of carrier communication to avoid the problems caused by using different carrier communication schemes; the two-path co-frequency lock-phase isolation power system realizes online sensitivity test; the noise simulator can simulate actual noise interference, therefore, tests can be processed freely without the interference of environment factor such as weather; the circuit resistance simulator can simulate actual resistance change of circuits, and supports the analysis on the circuit resistance change of carrier communication.
Description
Technical field
The utility model relates to a kind of low-voltage powerline carrier communication pilot system, by simulated field circuit environment, a kind of test method of the low-voltage carrier communication ability of detected carrier electric energy meter and other carrier communication product.Belong to the low-voltage powerline carrier communication technical field of measurement and test.
Background technology
Low-voltage powerline carrier communication is meant by carrier system the analog or digital signal loading is carried out the technology that signal transmits to the low voltage power transmission circuit.Because signal attenuation characteristic on the low voltage power transmission circuit and interference characteristic are very complicated, and randomness, time variation are big, and analytic expression or Mathematical Modeling are described and analyzed accurately to be difficult to find one.Thereby, effective method is never found in the test of low-voltage powerline carrier communication performance.At present, to low-voltage powerline carrier communication performance, technical indicator for want of advanced means and testing equipment, still be difficult to carry out the quantitative test of system.Test to the carrier communication performance of carrier electric energy meter and similar products can only be confined to detect qualitatively, or its communication success rate of test goes to pass judgment on its communication performance again after adopting the erecting bed.Method of testing and test result lack dissemination, thereby influence is passed judgment on and large scale application the performance of this series products.
Summary of the invention
The purpose of this utility model is intended to overcome the above-mentioned defective of existing in prior technology, proposes a kind of pilot system that is used to test the low-voltage powerline carrier communication performance.
Technical solution of the present utility model: its structure is that the carrier signal output of the carrier sending device in the pilot system and the signal input part of program control attenuating device join; The signal input part of the signal output part of program control attenuating device and tested carrier wave receiving system joins; Tested carrier wave receiving system is after receiving correct carrier signal and decoding, and the signal output part by tested carrier wave receiving system sends carrier signal again and replys communication; The carrier level end that carrier level that carrier sending device sends and tested carrier wave receiving system send all inserts the frequency spectrograph receiver and measures by the artificial mains network sampling back that is coupled; Computer reads the carrier level test data by the frequency spectrograph interface; The input one tunnel and the noise simulator of tested carrier wave receiving system join, and noise simulator connects computer control; Another road of the input of tested carrier wave receiving system and impedance simulator join, and the impedance simulator connects computer control; The output of power conditioner is delivered to two-way carrier wave isolated power supply respectively, assurance two-way power supply is with phase-locked work frequently and have the carrier wave buffer action, as same phase-locked low voltage experiment carrier communication circuit frequently, wherein one tunnel power supply of isolating is as the working power of tested carrier sending device, and another road power supply is as the working power of tested carrier wave receiving system.
Advantage of the present utility model: make the carrier communication product that a test platform that can compare arranged, certain guarantee and supervisory role have been played in large scale application to carrier wave.Adopted artificial mains network's parameter model of GB/T 6113 F2 regulations, the standardization level height, test data has comparativity; Adopt the way that changes the carrier communication channel parameter to test, avoided the test problem that adopts different carrier communication schemes to bring; Adopt two-way with the phase-locked insulating power supply of frequency system, realized online sensitivity test; Adopted noise simulator simulation actual noise interference environment, made test can carry out at any time, not influenced by environment factor such as outside weather; Adopted the line impedance simulator, can simulate actual track impedance variation environment, made carrier communication become possibility the analysis that line impedance changes.
Description of drawings
Accompanying drawing 1 is a low voltage power line carrier communication pilot system composition frame chart.
Embodiment
The contrast accompanying drawing, its structure is that the carrier signal output of the carrier sending device in the pilot system and the signal input part of program control attenuating device join; The signal input part of the signal output part of program control attenuating device and tested carrier wave receiving system joins; Tested carrier wave receiving system is after receiving correct carrier signal and decoding, and the signal output part by tested carrier wave receiving system sends carrier signal again and replys communication; The carrier level end that carrier level that carrier sending device sends and tested carrier wave receiving system send all inserts the frequency spectrograph receiver and measures by the artificial mains network sampling back that is coupled; Computer reads the carrier level test data by the frequency spectrograph interface; The input one tunnel and the noise simulator of tested carrier wave receiving system join, and noise simulator connects computer control; Another road of the input of tested carrier wave receiving system and impedance simulator join, and the impedance simulator connects computer control; The output of power conditioner is delivered to two-way carrier wave isolated power supply respectively, assurance two-way power supply is with phase-locked work frequently and have the carrier wave buffer action, as same phase-locked low voltage experiment carrier communication circuit frequently, wherein one tunnel power supply of isolating is as the working power of tested carrier sending device, and another road power supply is as the working power of tested carrier wave receiving system.Oscilloscope is used for observing carrier signal.
The control of carrier sending device is finished by computer interface.When computer sends the carrier communication order, carrier sending device sends carrier signal, carrier signal is transmitted on carrier channel, be sent to tested carrier wave receiving system, after the carrier wave receiving system receives correct carrier signal and decoding, send carrier signal again and carry out response mode communication, constituted the citation form of carrier communication like this.
The carrier level that carrier level that carrier sending device sends and carrier wave receiving system send is all taken a sample by coupling device by the artificial mains network, is measured by the frequency spectrograph receiver.
The artificial mains network has provided a suitable test environment, guarantees that test data has comparativity.
Frequency spectrograph has high sensitivity great dynamic range receiving ability, suitable the frequency spectrograph parameter is set can obtains correct test result.Computer reads the carrier level test number by the frequency spectrograph interface.
The control of carrier sending device is finished by computer interface.When computer sends the carrier communication order, carrier sending device sends carrier signal, carrier signal is sent to tested carrier wave receiving system through the program control attenuating device of carrier signal, the carrier wave receiving system sends carrier signal again and carries out response mode communication after receiving correct carrier signal and decoding.
The communication process of computer control carrier transmitting-receiving device, number of times and wrong yardage that record sends and receives, the size of the calculating communication error rate.
The total yardage (formula 1) of yardage ÷ communication of the communication error rate=communication failure
Programmable attenuator is subjected to computer control, the attenuation of programmable attenuator can change, be used to regulate the size that carrier wave sends signal, also just changed the signal to noise ratio of carrier wave receiving terminal, cause that the carrier communication error rate rises, when reaching the error rate of setting, the pad value of this moment is relevant with receiving sensitivity.Computer reads attenuator numerical value, goes out the carrier wave receiving sensitivity according to carrier wave transmission level and decay numerical computations.
Carrier wave receiving sensitivity=carrier wave transmission level ÷ attenuation multiple (formula 2)
Attenuation multiple=10
Pad value/20(formula 3)
At the input of tested carrier wave receiving system, noise simulator applies certain other noise signal of level the carrier signal that carrier sending device sends is disturbed, and noise simulator is subjected to computer control.
Noise simulator can produce white noise, coloured background noise, narrow-band noise, synchronous and asynchronous recurrent pulses noise and random impulsive noise, and the output frequency of noise simulator and amplitude can change.Computer has preestablished 1 grade to 30 grades noise intensity, output level, output frequency and waveform that corresponding noise simulator is different.Can revise noise intensity definition standard as required.
In the carrier communication process, apply the noise of different stage, the error rate delta data under recording noise disturbs is as the basis for estimation of the antinoise interference performance of carrier transmitting-receiving equipment.
The computational methods of the carrier communication error rate are equal to communication error rate calculation formula in the carrier wave receiving sensitivity.
At the input of carrier wave receiving system, the impedance simulator is attempted by on the carrier loop, analog electrical line of force load impedance, and the impedance simulator is subjected to computer control.
The impedance simulator can be set the topological structure of dissimilar impedances, and the various combination model according to cell impedance parallel connection and series connection produces the equiva lent impedance under the carrier frequency, and is redefined for 1 grade to 30 grades impedance model with computer.Can revise impedance model definition key element as required.
In the carrier communication process, change the rank of impedance simulator, also just changed the environment parameter of carrier communication channel, also just changed the communication error rate, the error rate under the different impedance ranks of computer recording, thus judge the anti-line load impedance variation of carrier transmitting-receiving equipment ability.
The computational methods of the carrier communication error rate are equal to communication error rate calculation formula in the carrier wave receiving sensitivity.
Claims (1)
1, low-voltage powerline carrier communication pilot system is characterized in that the carrier signal output of the carrier sending device in the pilot system and the signal input part of program control attenuating device join; The signal input part of the signal output part of program control attenuating device and tested carrier wave receiving system joins; Tested carrier wave receiving system is after receiving correct carrier signal and decoding, and the signal output part by tested carrier wave receiving system sends carrier signal again and replys communication; The carrier level that carrier level that carrier sending device sends and tested carrier wave receiving system send all inserts the frequency spectrograph receiver and measures by the artificial mains network sampling back that is coupled; Computer connects the frequency spectrograph interface and reads the carrier level test data; The input one tunnel and the noise simulator of tested carrier wave receiving system join, and noise simulator connects computer control; Another road of the input of tested carrier wave receiving system and impedance simulator join, and the impedance simulator connects computer control; The output of power conditioner is delivered to two-way carrier wave isolated power supply respectively, and wherein one tunnel power supply of isolating is as the working power of tested carrier sending device, and another road power supply is as the working power of tested carrier wave receiving system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201612645U CN201312312Y (en) | 2008-11-19 | 2008-11-19 | Low voltage power cord carrier communication test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201612645U CN201312312Y (en) | 2008-11-19 | 2008-11-19 | Low voltage power cord carrier communication test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201312312Y true CN201312312Y (en) | 2009-09-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008201612645U Expired - Lifetime CN201312312Y (en) | 2008-11-19 | 2008-11-19 | Low voltage power cord carrier communication test system |
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| CN (1) | CN201312312Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102377681A (en) * | 2011-12-09 | 2012-03-14 | 重庆市电力公司电力科学研究院 | Power line carrier routing algorithm-based testing device and system |
| CN101404523B (en) * | 2008-11-19 | 2013-03-20 | 南京新联电子股份有限公司 | Low-voltage powerline carrier communication experiment method and its experiment system |
| CN105356909A (en) * | 2015-10-16 | 2016-02-24 | 瑞斯康微电子（深圳）有限公司 | Power line carrier communication performance detection device |
| CN105933079A (en) * | 2016-06-01 | 2016-09-07 | 国网河北省电力公司电力科学研究院 | Detection system and detection method for communication performance of carrier signals with different frequencies |
| WO2017063180A1 (en) * | 2015-10-16 | 2017-04-20 | 瑞斯康微电子（深圳）有限公司 | Power line carrier communication performance detection device |
| CN108768451A (en) * | 2018-04-28 | 2018-11-06 | 华立科技股份有限公司 | power line carrier integrated test system and test method |
| CN109302244A (en) * | 2018-10-23 | 2019-02-01 | 国网天津市电力公司电力科学研究院 | A kind of low-voltage powerline carrier communication unit communication ability detection method and system |
| CN111030730A (en) * | 2019-12-05 | 2020-04-17 | 国网天津市电力公司电力科学研究院 | Low-voltage power line noise recording and injecting system |
| CN113507297A (en) * | 2021-05-26 | 2021-10-15 | 青岛鼎信通讯股份有限公司 | Test method and system for evaluating performance of HPLC communication unit |
-
2008
- 2008-11-19 CN CNU2008201612645U patent/CN201312312Y/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101404523B (en) * | 2008-11-19 | 2013-03-20 | 南京新联电子股份有限公司 | Low-voltage powerline carrier communication experiment method and its experiment system |
| CN102377681A (en) * | 2011-12-09 | 2012-03-14 | 重庆市电力公司电力科学研究院 | Power line carrier routing algorithm-based testing device and system |
| CN105356909A (en) * | 2015-10-16 | 2016-02-24 | 瑞斯康微电子（深圳）有限公司 | Power line carrier communication performance detection device |
| WO2017063180A1 (en) * | 2015-10-16 | 2017-04-20 | 瑞斯康微电子（深圳）有限公司 | Power line carrier communication performance detection device |
| CN105933079A (en) * | 2016-06-01 | 2016-09-07 | 国网河北省电力公司电力科学研究院 | Detection system and detection method for communication performance of carrier signals with different frequencies |
| CN108768451A (en) * | 2018-04-28 | 2018-11-06 | 华立科技股份有限公司 | power line carrier integrated test system and test method |
| CN108768451B (en) * | 2018-04-28 | 2021-07-20 | 华立科技股份有限公司 | Power line carrier integrated test system and test method |
| CN109302244A (en) * | 2018-10-23 | 2019-02-01 | 国网天津市电力公司电力科学研究院 | A kind of low-voltage powerline carrier communication unit communication ability detection method and system |
| CN111030730A (en) * | 2019-12-05 | 2020-04-17 | 国网天津市电力公司电力科学研究院 | Low-voltage power line noise recording and injecting system |
| CN113507297A (en) * | 2021-05-26 | 2021-10-15 | 青岛鼎信通讯股份有限公司 | Test method and system for evaluating performance of HPLC communication unit |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20090916 Effective date of abandoning: 20081119 |
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| RGAV | Abandon patent right to avoid regrant |