CN108964703B - Testing device of power line carrier communication equipment - Google Patents
Testing device of power line carrier communication equipment Download PDFInfo
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- CN108964703B CN108964703B CN201710351468.9A CN201710351468A CN108964703B CN 108964703 B CN108964703 B CN 108964703B CN 201710351468 A CN201710351468 A CN 201710351468A CN 108964703 B CN108964703 B CN 108964703B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/46—Monitoring; Testing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/46—Monitoring; Testing
- H04B3/48—Testing attenuation
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The invention provides a testing device of power line carrier communication equipment, which comprises an alternating current power supply, a filter, a conversion module, an attenuator, a recording module, a control module and an indication module; two ends of the alternating current power supply are connected with a filter and power line carrier communication equipment; one end of the conversion module is connected between the filter and the power line carrier communication equipment, and the other end of the conversion module is connected with an attenuator; the control module is connected with the attenuator, the recording module and the indicating module; the attenuator is connected with the control module, and the control module controls the attenuation value of the attenuator; the recording module is connected between the alternating current power supply and the filter at one end, collects and records test data, is connected with the control module at the other end, transmits the test data to the control module, and the control module reads the test data to judge the test result of the power line carrier communication equipment; the indication module is controlled to display the test result. By adopting the technical scheme, a pure test environment can be established, and the accuracy of the test result of the tested equipment is improved.
Description
Technical Field
The present invention relates to the field of testing power line carrier communication devices, and in particular, to a testing apparatus for a power line carrier communication device.
Background
Power line carrier communication (PLC) is a basic communication system specific to a power system, and is a technology for transmitting analog or digital signals at high speed by a carrier system using an existing power line. However, the voltage power line is not dedicated to transmitting communication data, and its topology and physical characteristics are different from those of conventional communication transmission media, such as twisted pair, coaxial cable, optical fiber, and the like. The power line has complex channel characteristics, more load, strong noise interference, large channel attenuation and channel delay when transmitting communication signals, and the power line carrier communication equipment has high requirements on the communication performance. However, the current testing device and testing means have certain limitations, and cannot reasonably verify the communication function of the carrier communication product, and particularly under the condition of strong external noise interference, the performance test of the power line carrier communication equipment is difficult to perform.
Therefore, a novel testing device for the power line carrier communication equipment is needed, a pure testing environment can be established, and the accuracy of the testing result of the tested equipment is improved.
Disclosure of Invention
In order to overcome the technical defects, the invention aims to provide a testing device of a power line carrier communication device.
The invention discloses a testing device of power line carrier communication equipment, which comprises an alternating current power supply, a filter, a conversion module, an attenuator, a recording module, a control module and an indication module; the two ends of the alternating current power supply are respectively connected with the filter and then connected with the power line carrier communication equipment to supply power for the power line carrier communication equipment to form an alternating current circuit; one end of the conversion module is connected between the filter and the power line carrier communication equipment, the other end of the conversion module is connected with the attenuator, and the conversion module and the attenuator form a carrier communication line; the control module is connected with the attenuator, the recording module and the indicating module; the attenuator is connected with the control module, and the control module controls the attenuation value of the attenuator; the recording module is connected between the alternating current power supply and the filter at one end, collects and records test data, is connected with the control module at the other end, and transmits the test data to the control module, and the control module reads the test data and judges the test result of the power line carrier communication equipment according to the test data; the indication module is connected with the control module and used for controlling the indication module to display the test result of the power line carrier communication equipment.
Preferably, the conversion module is configured to convert a differential signal passing through the carrier communication line into a single-ended signal, and simultaneously transmit the single-ended signal to the attenuator.
Preferably, the control module comprises a GPIO interface, and is respectively connected with the attenuator, the recording module and the indicating module through the GPIO interface, and further comprises a USB interface, and is connected with an interaction module through the USB interface.
Preferably, the control module further comprises a microprocessor, wherein one end of the microprocessor is connected with the USB interface, further connected with the interaction module, and one end of the microprocessor is connected with the GPIO interface, further connected with the attenuator, the recording module and the indication module; the interaction module controls the microprocessor to set the attenuation value of the attenuator; the microprocessor reads the test data of the recording module, transmits the test data to the interaction module and displays the test data in the interaction module; and the microprocessor calculates according to the test data and controls the indication module to display the test result.
Preferably, the attenuator is connected to the coupler.
Preferably, the coupler is connected to an SMA connector.
Preferably, the filter is a low pass filter attenuating signals having frequencies between 1MHz and 200MHz by 60 dB.
Preferably, the low pass filter forms 100dB of isolation for the signal between the power line carrier communication devices.
Preferably, the power converter is one or both of an AC-DC converter and a DC-DC converter.
After the technical scheme is adopted, compared with the prior art, the method has the following beneficial effects:
1. filtering the external noise interference signals and providing a testable environment for tested equipment which cannot be tested under normal conditions;
2. through the interactive center, the performance testing device of the automatic power line carrier communication equipment is established by taking programmable adjustment of transmission channel parameters as a means.
Drawings
Fig. 1 is a schematic structural diagram of a testing apparatus of a power line carrier communication device according to a preferred embodiment of the present invention.
Reference numerals:
10-ac power, 11-filter, 12-conversion module, 13-attenuator, 14-recording module, 15-control module, 16-indication module, 17-power converter, 18-coupler interface.
Detailed Description
Advantages of the invention are further illustrated in the following description, taken in conjunction with the accompanying drawings and detailed description.
Referring to fig. 1, a schematic diagram of a testing apparatus of a power line carrier communication device according to a preferred embodiment of the present invention includes an ac power supply 10, a filter 11, a conversion module 12, an attenuator 13, a recording module 14, a control module 15, and an indication module 16;
an ac power supply 10 for supplying 110V or 220V ac power to the test device, and a power switch for turning on or off the power supply and connected to a power indicator lamp for displaying the on or off state of the power supply;
filter 11, connected to each end of ac power supply 10 is a filter 11, which is then connected to the power line carrier communication device, to supply power to the power line carrier communication device, forming an ac power line. In this ac line, the filter 11 is used to filter the external low voltage noise signal, preferably for detection by an engineer on the line, a three-phase ac clean regulated power supply may be used. The two ends of the power supply are respectively connected with the filter 11, the high-performance isolator and the artificial power supply network so as to realize effective isolation between the whole testing environment and the commercial power supply network, and the power line carrier communication equipment which cannot be tested under normal conditions can be provided with a testable environment after noise in power supply signals is filtered out, so that the tested equipment is not interfered by the external environment.
A conversion module 12, one end of which is connected between the filter 11 and the power line carrier communication device, and the other end of which is connected with an attenuator 13, the conversion module 12 and the attenuator 13 forming an independent carrier communication line and completely isolating the carrier signal on the ac line, at least until communication is not successful in the event of disconnection of the attenuation channel;
an attenuator 13, in which an attenuation-adjustable power line attenuator 13 is interposed on the carrier communication line, the gradual progress from on to off of the carrier signal can be realized by adjusting the attenuator 13, the attenuation of the attenuator 13 can be set to a fixed value (e.g. 20 dB), or the attenuation can be gradually increased from a certain amount, and the carrier communication test is performed for a certain number of times (e.g. 100 times) under each attenuation condition, so as to record the communication success rate. The on-off condition of the carrier signal in each actual condition is simulated by the attenuator 13, so that the performance of the tested device under the on-off condition can be tested, and the test of the tested device is completed.
The recording module 14, which may be a three-phase smart meter, has one end connected between the ac power supply 10 and the filter 11, collects and records serial data such as status and electrical energy value, and the other end connected with the control module 15, and transmits the data to the control module 15, and the control module 15 reads the data;
the control module 15, which serves as a master station of the carrier communication line, is connected with the attenuator 13, the recording module 14 and the indicating module 16 through the ethernet/USB/serial bus, so as to realize control of the test environment, and performs data intercommunication, the control module 15 controls the attenuation of the attenuator 13, the recording module 14 is controlled to read the data of the recording module 14, the indicating module 16 is controlled to display the test result of the power line carrier communication device according to the data of the recording module 14, and if the test result is in a normal range, the tested device can be judged to reach the required performance. And if the test result belongs to an abnormal range, judging that the tested equipment does not reach the required performance.
The indication module 16, which is two performance indicator lamps, is connected to the control module 15, and displays whether the power line carrier communication device meets the performance requirement according to the instruction of the control module 15. For example, different test results are displayed by different lighting conditions and color conditions of the indicator lights when illuminated.
Based on the above configuration, under the control of the control module 15, the attenuator 13 performs carrier communication with the device under test through the power line transmission path, changes the channel attenuation of the carrier communication line, the recording module 14 receives the control and meter reading commands sent by the control module 15, returns serial data such as state and electric energy value, changes the test conditions, collects and records various parameters and indexes under different test conditions, the control module 15 reads the data of the recording module 14, and accordingly analyzes, diagnoses and evaluates the communication performance of the device under test, and the control indication module 16 displays whether the device under test meets the performance requirement.
In a preferred embodiment, the conversion module 12 may be designed as a Balun circuit for converting a differential signal through the carrier communication line into a single-ended signal while transmitting the single-ended signal to the attenuator 13.
Further preferably, the control module 15 includes a GPIO interface, and is connected to the attenuator 13, the recording module 14, and the indicating module 16 through the GPIO interface, and further includes a USB interface, and is connected to an external interaction module through the USB interface, so that a user can input the amount of attenuation required by the attenuator 13, the data to be tested, and the like into the control module 15 through the operation on the interaction module, so that the control module 15 further tests the device to be tested according to the requirement of the user.
The testing device can also comprise a microprocessor, wherein one end of the microprocessor is connected with the USB interface, then connected with the interaction module, and one end of the microprocessor is connected with the GPIO interface, then connected with the attenuator 13, the recording module 14 and the indicating module 16; the user operates the interactive module, the microprocessor is controlled by setting the interactive module, the attenuation value of the attenuator 13 is further set, the microprocessor reads the data of the recording module 14 and transmits the data to the interactive module, the data are displayed in the interactive module, the microprocessor analyzes and calculates the data, the communication performance of the tested equipment is evaluated according to the data, and the control indication module 16 displays whether the tested equipment meets the performance requirement.
Further preferably or alternatively, the attenuator 13 is connected to a coupler, integral with the coupler, and the coupler interface 18 of the coupler is in turn connected to an SMA connector. The filter 11 is a low pass filter 11, has no effect on signals with frequencies lower than 10KHz, attenuates carrier signals with frequencies between 1MHz and 200MHz by 60dB, and the maximum current passed is 6A. The low pass filter 11 forms 100dB of isolation for the carrier signal between the devices under test. The power converter 17 is one or both of an AC-DC converter and a DC-DC converter.
After the configuration is adopted, a user can realize the test requirement on the tested equipment through the interaction equipment, and meanwhile, the whole test environment built by the test device is clean and noiseless, and the accuracy of a test result is ensured.
It should be noted that the embodiments of the present invention are preferred and not limited in any way, and any person skilled in the art may make use of the above-disclosed technical content to change or modify the same into equivalent effective embodiments without departing from the technical scope of the present invention, and any modification or equivalent change and modification of the above-described embodiments according to the technical substance of the present invention still falls within the scope of the technical scope of the present invention.
Claims (6)
1. A testing device of power line carrier communication equipment comprises an alternating current power supply, a filter, a conversion module, an attenuator, a recording module, a control module and an indication module; the filter, the conversion module and the recording module are used in pairs;
the two ends of the alternating current power supply are respectively connected with the filter and then connected with the power line carrier communication equipment to supply power for the power line carrier communication equipment to form an alternating current circuit;
the filter is a low-pass filter, and attenuates signals with frequencies between 1MHz and 200MHz by 60 dB;
one end of the conversion module is connected between the filter and the power line carrier communication equipment, the other end of the conversion module is connected with the attenuator, the conversion module and the attenuator form a carrier communication line, the conversion module is used for converting a differential signal passing through the carrier communication line into a single-ended signal and simultaneously transmitting the single-ended signal to the attenuator,
the conversion module comprises a power supply converter, wherein the power supply converter is one or two of an AC-DC converter and a DC-DC converter, and the conversion module is connected with the AC power supply;
the control module is connected with the attenuator, the recording module and the indicating module;
the attenuator is connected with the control module, and the control module controls the attenuation value of the attenuator;
the recording module is connected between the alternating current power supply and the filter at one end, collects and records test data, is connected with the control module at the other end, and transmits the test data to the control module, and the control module reads the test data and judges the test result of the power line carrier communication equipment according to the test data;
the indication module is connected with the control module and used for controlling the indication module to display the test result of the power line carrier communication equipment.
2. The test apparatus of the power line carrier communication device according to claim 1, wherein the control module includes a GPIO interface, and is connected to the attenuator, the recording module, and the indicating module through the GPIO interface, respectively;
the control module further comprises a USB interface, and is connected with an interaction module through the USB interface.
3. The test device of the power line carrier communication equipment according to claim 2, wherein the control module further comprises a microprocessor, one end of the microprocessor is connected with the USB interface and then connected with the interaction module, and one end of the microprocessor is connected with the GPIO interface and then connected with the attenuator, the recording module and the indicating module;
the interaction module controls the microprocessor to set the attenuation value of the attenuator;
the microprocessor reads the test data of the recording module, transmits the test data to the interaction module and displays the test data in the interaction module;
and the microprocessor calculates according to the test data and controls the indication module to display the test result.
4. A testing apparatus of a power line carrier communication device according to claim 3, wherein the attenuator is connected to a coupler.
5. The test apparatus of claim 4, wherein the coupler is connected to an SMA connector.
6. The test apparatus of power line carrier communication devices of claim 1, wherein the low pass filter forms 100dB of isolation for the signals between the power line carrier communication devices.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710351468.9A CN108964703B (en) | 2017-05-18 | 2017-05-18 | Testing device of power line carrier communication equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710351468.9A CN108964703B (en) | 2017-05-18 | 2017-05-18 | Testing device of power line carrier communication equipment |
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| CN108964703A CN108964703A (en) | 2018-12-07 |
| CN108964703B true CN108964703B (en) | 2023-10-20 |
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| CN201710351468.9A Active CN108964703B (en) | 2017-05-18 | 2017-05-18 | Testing device of power line carrier communication equipment |
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| CN113691280A (en) * | 2021-09-18 | 2021-11-23 | 广东电网有限责任公司 | Modular carrier communication testing arrangement |
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| CN102655422A (en) * | 2011-03-02 | 2012-09-05 | 华北电力科学研究院有限责任公司 | Test system for low-voltage power carrier communication equipment |
| CN106100767A (en) * | 2016-07-15 | 2016-11-09 | 国网江西省电力科学研究院 | A kind of carrier communication module intelligent checking system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9615270B2 (en) * | 2013-11-04 | 2017-04-04 | State Grid Corporation Of China | Intelligent power utilization communication product detecting system |
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| CN102655422A (en) * | 2011-03-02 | 2012-09-05 | 华北电力科学研究院有限责任公司 | Test system for low-voltage power carrier communication equipment |
| CN106100767A (en) * | 2016-07-15 | 2016-11-09 | 国网江西省电力科学研究院 | A kind of carrier communication module intelligent checking system |
| CN106330260A (en) * | 2016-08-23 | 2017-01-11 | 杭州海兴电力科技股份有限公司 | Laboratory test device and method of low-voltage power line carrier performance |
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