CN204119227U - Intelligent electric meter carrier communication module test gimulator - Google Patents
Intelligent electric meter carrier communication module test gimulator Download PDFInfo
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Abstract
The utility model relates to power line carrier communication field, be specifically related to a kind of intelligent electric meter carrier communication module test gimulator, comprise power purification unit, electric energy meter base table interface unit, carrier module interface unit, LV-PLC channel analogue unit, detecting unit and centralized control computer, described power purification unit and described LV-PLC channel analogue unit, carrier module interface unit connects respectively, described centralized control computer and described LV-PLC channel analogue unit, carrier module interface unit, electric energy meter base table interface unit connects respectively, described carrier module interface unit also with LV-PLC channel analogue unit, detecting unit connects respectively.The utility model comprehensively and effectively simulated intelligence electric meter carrier wave communication module, in every essential characteristic of practical communication environment, effectively can be tested the performance parameter of carrier module in different power line environment, realize cost low, easy to operate.
Description
Technical field
The utility model relates to power line carrier communication field, is specifically related to a kind of intelligent electric meter carrier communication module test gimulator.
Background technology
Intelligent electric meter carrier communication module is mainly used in power user power consumption information acquisition system.Current electric-power centralized meter reading system is generally made up of jointly main website, concentrator, cascade terminal, collector and electric energy meter, and system architecture can be divided into 3 communication channels: the uplink communication channel of main website and concentrator; The downlink communication channel of concentrator and collector and electric energy meter; The cascaded communication channel of concentrator and cascade terminal.In downlink communication channel, present stage mostly adopts PLC technology.Along with the development gradually of domestic and international PLC technology, signal madulation mode also gets more and more, and the modulation system that low-voltage powerline carrier communication chip is conventional has: narrow band communication technology, SSC technology, OFDM (OFDM) technology, orthogonal multiple carrier technology, chain code adaptive technique etc.
Along with the development of intelligent grid, intelligent electric meter application is more and more extensive.While the producer of production of intelligent ammeter increases on market, the carrier communication module of use separately and modulation system thereof are varied.In the face of the power line communication environment of China's bulky complex, the performance that the product of each carrier communication module producer shows in actual power line environment is different, this just brings difficulty for carrier communication module interchangeability in actual applications, seriously constrain the development of intelligent grid, improve the construction cost of electrical network.In order to the communication performance of the low-voltage power line carrier communication module that different manufacturers is produced can be passed judgment on, for providing Data support to the research of carrier communication module interchangeability afterwards, present stage is starved of a kind of carrier communication module test gimulator, with realization to the test of carrier communication module parameter and assessment, and can the key technology of this test gimulator be just effectively simulate low-voltage power line communication environment.
Intelligent electric meter carrier communication module is between electric energy meter base table and power line, and its communication environment is comparatively complicated, large to the measurement difficulty of carrier communication module parameter in actual environment, cost is high, do not have universality in specific environment.Test gimulator can the communication environment of analog carrier communication module effectively, conveniently measures carrier communication module parameter.The analogue system of current low-voltage power line communication environment relates generally to the communication between concentrator and electric meter carrier wave module, do not consider the impact that electric energy meter base table produces carrier communication module parameter, there is the defect that complex structure, specific aim are not strong, cost is high.For carrier communication module test concentrator only serve and send the effect of communication instruction, and need not to add for the test of carrier communication module, to cause the waste of functional parameter.
In sum, existing low-voltage powerline carrier communication analogue technique does not design for carrier communication module test, can not the communication environment of comprehensive and accurate reflection intelligent electric meter carrier communication module both sides, there is the defect that complex structure, specific aim are not strong, cost is high, the needs of intelligent electric meter carrier communication module interchangeability research cannot be met.
Utility model content
The purpose of this utility model is to provide a kind of intelligent electric meter carrier communication module test gimulator, solves the communication environment reflection of existing analogue technique to intelligent electric meter carrier communication module both sides not accurate and comprehensive enough, and the problem that complex structure cost is high.
For solving above-mentioned technical problem, the utility model is by the following technical solutions: a kind of intelligent electric meter carrier communication module test gimulator, comprise power purification unit, electric energy meter base table interface unit, carrier module interface unit, LV-PLC channel analogue unit, detecting unit and centralized control computer, described power purification unit and described LV-PLC channel analogue unit, carrier module interface unit connects respectively, described centralized control computer and described LV-PLC channel analogue unit, carrier module interface unit, electric energy meter base table interface unit connects respectively, described carrier module interface unit also with LV-PLC channel analogue unit, detecting unit connects respectively,
Described power purification unit be used for for this simulator inside provide electric energy, isolation interference noise and eliminate described in LV-PLC channel analogue unit produce carrier signal and noise on the impact of described carrier module interface unit; Described LV-PLC channel analogue unit is used for the simulation signal that described power purification unit exports being comprised to the communication environment features such as concentrator signal, power line noise, loss decay, power line impedance and power line load; Described carrier module interface unit is used for providing electric energy for the carrier module be connected with described carrier module interface unit, and realizes from described LV-PLC channel analogue unit to the communication link of described electric energy meter base table interface unit; Described electric energy meter base table interface unit is used for providing communication connection for the electric energy meter be connected with described electric energy meter base table interface unit; Described detecting unit is for testing described carrier communication module input and output signal parameter; Described centralized control computer is used for communicating to test described communication equipment and communicate with detection and control electric energy meter state parameter with described electric energy meter base table interface unit with carrier communication unit to the control of each channel characteristics simulation in described LV-PLC channel unit.
Further technical scheme is, described power purification unit comprises the first order filter circuit and second level filter circuit that connect successively from civil power, second level filter circuit is connected to described carrier module interface unit, and described LV-PLC channel analogue unit is connected between first order filter circuit and second level filter circuit by carrier wave split circuit;
Described first order filter circuit is used for providing power supply for this simulator, and eliminates by impedance matching the interference noise that external power source brings to communication channel; Described second level filter circuit is used for providing power supply for described carrier module interface unit, and the carrier signal that produces of the LV-PLC channel analogue unit described in eliminating and noise are on the impact of described carrier module interface unit; The power frequency component that described carrier wave split circuit exports for separating of first order filter circuit and high frequency carrier signal of communication.
Further technical scheme is, described LV-PLC channel analogue unit comprises and being all connected with centralized control computer and the concentrator signal loading module, noise load-on module, fading channel module, power line transmission module and the power line load blocks that connect successively from carrier wave split circuit, and described power line load blocks is connected to electric energy meter base table interface unit, carrier module interface unit and detecting unit respectively;
Described concentrator signal loading module is used for, in the electric power signal simulation concentrator instruction load produced by described centralized control computer exported to the first order filter circuit from described power purification unit, completing concentrator sends control command simulation to intelligent electric meter; The multicarrier communication signal that described noise load-on module is used for exporting to described concentrator signal loading module loads noise; The signal that described fading channel module is used for described noise load-on module exports carries out damped impedance simulation; Described power line transmission module is used for carrying out transfer impedance simulation to the output signal of described fading channel module; The signal that described power line load blocks is used for described power line transmission module exports carries out load impedance simulation.
Further technical scheme is, described concentrator signal loading module comprises and connects serial communication interface, storage chip, D/A conversion chip and power amplifier successively, wherein said serial communication interface is connected to centralized control computer by RS232 interface, described power amplifier is connected to noise load-on module, and described power purification unit is connected between D/A conversion chip and power amplifier.
Further technical scheme is, described carrier module interface emulates unit comprises the power supply noise injection circuit, protective circuit unit and the carrier module socket that connect successively from power purification unit, described carrier module socket connects LV-PLC channel analogue unit and electric energy meter base table interface unit, and described power supply noise injection circuit is connected with centralized control computer;
The power supply that described power supply noise injection circuit is used for providing to carrier module adds noise, to simulate the characteristics such as power supply noise noise in power supply that electric energy meter in side circuit provides for carrier module and power supply ripple noise; The power supply that described protective circuit unit is used for being supplied to for electric energy meter base table described carrier module interface unit provides overvoltage, overcurrent and electrostatic protection; Described carrier module socket is for transmitting the carrier (boc) modulated signals between LV-PLC channel analogue unit and electric energy meter base table interface unit.
Further technical scheme is, described electric energy meter interface module comprises the electric appliance load module and electric energy meter base table socket that connect successively from centralized control computer, and described electric energy meter base table socket is connected to carrier module interface unit;
Described electric appliance load module is used for electric appliance load characteristic simulation user in reality being accessed to ammeter; Described electric energy meter base table socket is for transmitting the ammeter information between electric appliance load characteristic simulation and carrier module interface unit.
Further technical scheme is, described detecting unit is oscilloscope or frequency spectrograph.
Compared with prior art, the beneficial effects of the utility model are:
The utility model passes through the interference that power subsystem filtering external power source noise is tested carrier communication channel and carrier module power supply noise, for whole simulator provides good test environment; By the control of centralized control computer to low-voltage powerline carrier communication unit and carrier module interface unit, achieve the simulation of power line interface to carrier module and this both sides communication environment of electric energy meter base table interface; By the cooperation of the electric energy meter base table socket in the carrier module socket in carrier module interface unit and electric energy meter base table interface unit, solve the adaptive test problem between the electric energy meter base table of the different vendor's production run in actual conditions and different carrier module.Compared to existing technology, the utility model example can meet the requirement of various different carrier module testing, comprehensively and effectively simulated intelligence electric meter carrier wave communication module is in every essential characteristic of practical communication environment, effectively can test the performance parameter of carrier module in different power line environment, realize cost low, easy to operate, be conducive to promoting the research of intelligent electric meter carrier communication module interchangeability.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the utility model intelligent electric meter carrier communication module test gimulator embodiment.
Fig. 2 is the detailed block diagram of the test gimulator based on Fig. 1.
Fig. 3 is the structured flowchart of the concentrator signal loading module according to the utility model example.
Fig. 4 is the structured flowchart of the carrier module interface unit according to the utility model example.
Fig. 5 is the structured flowchart of the electric energy meter base table interface unit according to the utility model example.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Fig. 1 shows an embodiment of the utility model intelligent electric meter carrier communication module test gimulator: a kind of intelligent electric meter carrier communication module test gimulator, it is characterized in that: comprise power purification unit, electric energy meter base table interface unit, carrier module interface unit, LV-PLC channel analogue unit, detecting unit and centralized control computer, described power purification unit and described LV-PLC channel analogue unit, carrier module interface unit connects respectively, described centralized control computer and described LV-PLC channel analogue unit, carrier module interface unit, electric energy meter base table interface unit connects respectively, described carrier module interface unit also with LV-PLC channel analogue unit, detecting unit connects respectively,
Described power purification unit be used for for this simulator inside provide electric energy, isolation interference noise and eliminate described in LV-PLC channel analogue unit produce carrier signal and noise on the impact of described carrier module interface unit; Described LV-PLC channel analogue unit is used for the simulation signal that described power purification unit exports being comprised to the communication environment features such as concentrator signal, power line noise, loss decay, power line impedance and power line load; Described carrier module interface unit is used for providing electric energy for the carrier module be connected with described carrier module interface unit, and realizes from described LV-PLC channel analogue unit to the communication link of described electric energy meter base table interface unit; Described electric energy meter base table interface unit is used for providing communication connection for the electric energy meter be connected with described electric energy meter base table interface unit; Described detecting unit is for testing described carrier communication module input and output signal parameter; Described centralized control computer is used for communicating to test described communication equipment and communicate with detection and control electric energy meter state parameter with described electric energy meter base table interface unit with carrier communication unit to the control of each channel characteristics simulation in described LV-PLC channel unit.
In the above-described embodiments, described carrier module is directly used in the power supply of LV-PLC channel analogue unit, decreases the impact of carrier signal on simulator power supply, save the power supply circuits of LV-PLC channel analogue unit simultaneously; Carrier module is separated with electric energy meter base table, realizes freely mating between dissimilar carrier module and electric energy meter, contribute to the research of carrier communication module interchangeability.
Fig. 2 shows a preferred embodiment of the utility model intelligent electric meter carrier communication module test gimulator, described power purification unit comprises the first order filter circuit and second level filter circuit that connect successively from civil power, second level filter circuit is connected to described carrier module interface unit, and described LV-PLC channel analogue unit is connected between first order filter circuit and second level filter circuit by carrier wave split circuit;
Described first order filter circuit is used for providing power supply for this simulator, and eliminates by impedance matching the interference noise that external power source brings to communication channel; Described second level filter circuit is used for providing power supply for described carrier module interface unit, and the carrier signal that produces of the LV-PLC channel analogue unit described in eliminating and noise are on the impact of described carrier module interface unit; The power frequency component that described carrier wave split circuit exports for separating of first order filter circuit and high frequency carrier signal of communication.
As preferably, carrier wave split circuit adopts V-type artificial mains network, power supply input is connected with first order filter circuit, power output end provides 220V power frequency component for described LV-PLC channel analogue unit, disturbs output and described concentrator signal loading model calling to export high frequency carrier signal of communication.
Fig. 2 also show another preferred embodiment of the utility model intelligent electric meter carrier communication module test gimulator, described LV-PLC channel analogue unit comprises and being all connected with centralized control computer and the concentrator signal loading module, noise load-on module, fading channel module, power line transmission module and the power line load blocks that connect successively from carrier wave split circuit, and described power line load blocks is connected to electric energy meter base table interface unit, carrier module interface unit and detecting unit respectively;
Described concentrator signal loading module is used for, in the electric power signal simulation concentrator instruction load produced by described centralized control computer exported to the first order filter circuit from described power purification unit, completing concentrator sends control command simulation to intelligent electric meter; The multicarrier communication signal that described noise load-on module is used for exporting to described concentrator signal loading module loads noise; The signal that described fading channel module is used for described noise load-on module exports carries out damped impedance simulation; Described power line transmission module is used for carrying out transfer impedance simulation to the output signal of described fading channel module; The signal that described power line load blocks is used for described power line transmission module exports carries out load impedance simulation.
Above-mentioned is in strength, described noise load-on module, forms noise file storehouse, realize the effective simulation to power supply noise noise and power supply ripple noise characteristic under actual measurement environment; Described concentrator signal loading module, forms instruction database file to dissimilar concentrator command signal collection, realizes multiple concentrator instruction simulation, reduce testing cost by centralized control computer.
Fig. 3 shows another preferred embodiment of the utility model intelligent electric meter carrier communication module test gimulator, described concentrator signal loading module comprises and connects serial communication interface, storage chip, D/A conversion chip and power amplifier successively, wherein said serial communication interface is connected to centralized control computer by RS232 interface, described power amplifier is connected to noise load-on module, and described power purification unit is connected between D/A conversion chip and power amplifier.
Described concentrator signal loading module acquires concentrator different instruction signal forms command signal library file, by centralized control computer, corresponding concentrator command signal is imported into the described serial communication interface of concentrator signal loading module by RS232 interface when testing carrier module, described storage chip carries out buffer-stored to concentrator command signal, described D/A conversion chip is used for concentrator command signal to be converted to analog signal, to realize and the superposing of carrier signal, signal after superposition is carried out power amplification by described power amplifier, thus realize the loading of concentrator signal.
Fig. 4 shows another preferred embodiment of the utility model intelligent electric meter carrier communication module test gimulator, described carrier module interface emulates unit comprises the power supply noise injection circuit, protective circuit unit and the carrier module socket that connect successively from power purification unit, described carrier module socket connects LV-PLC channel analogue unit and electric energy meter base table interface unit, and described power supply noise injection circuit is connected with centralized control computer;
The power supply that described power supply noise injection circuit is used for providing to carrier module adds noise, to simulate the characteristics such as power supply noise noise in power supply that electric energy meter in side circuit provides for carrier module and power supply ripple noise; The power supply that described protective circuit unit is used for being supplied to for electric energy meter base table described carrier module interface unit provides overvoltage, overcurrent and electrostatic protection; Described carrier module socket is for transmitting the carrier (boc) modulated signals between LV-PLC channel analogue unit and electric energy meter base table interface unit.
Described noise load-on module is connected with described centralized control computer, due to the complexity of noise, actual measurement gathers the formation of noise noise file storehouse in varying environment, noise file is provided by described centralized control computer, change through the D/A of described noise load-on module, noise amplify, be loaded in carrier signal, complete the simulation to power line noise feature.As preferably, described signal attenuation unit adopts adjustable attenuator, to realize simulating in power line environment decay in various degree, completes carrier communication modularity parameter testing under differential declines.
Fig. 5 shows another preferred embodiment of the utility model intelligent electric meter carrier communication module test gimulator, described electric energy meter interface module comprises the electric appliance load module and electric energy meter base table socket that connect successively from centralized control computer, and described electric energy meter base table socket is connected to carrier module interface unit;
Described electric appliance load module is used for electric appliance load characteristic simulation user in reality being accessed to ammeter; Described electric energy meter base table socket is for transmitting the ammeter information between electric appliance load characteristic simulation and carrier module interface unit.
According to another preferred embodiment of the utility model intelligent electric meter carrier communication module test gimulator, described detecting unit is oscilloscope or frequency spectrograph.
In sum, the interface simulator that the utility model embodiment provides can realize following beneficial effect:
(1) this interface simulator for carrier communication module comprehensive simulated power line channel environmental characteristic, power supply noise feature, electric energy meter base table communication feature that the work of carrier module is had an impact;
(2) connected by centralized control computer, realize the regulable control to channel parameters such as power line noise, power line channel decay, power line transmission impedance, power line load, carrier module power supply noise and electric appliance loads in carrier communication, to realize the test of carrier communication module parameter under different communication environment;
(3) collection is carried out to the command signal of dissimilar concentrator and form instruction database file, the control to intelligent electric meter end carrier communication module input and output carrier signal can be realized by concentrator signal loading module, realizing multiple concentrator is simulation, and reducing concentrator is use cost;
(4) noise file storehouse produces by surveying ambient noise, power supply noise injection module realizes the effective simulation to power supply noise noise and power supply ripple noise characteristic, by the adjustment noise of centralized control computer, realize testing carrier communication module power adaptation;
(5) carrier module socket and electric energy meter base table socket meet the communication interface specification of carrier module and electric energy meter base table respectively, realize meeting different electric energy meter base table and test the matching of different carrier module.
Although be described the utility model with reference to multiple explanatory embodiment of the present utility model here, but, should be appreciated that, those skilled in the art can design a lot of other amendment and execution mode, these amendments and execution mode will drop within spirit disclosed in the present application and spirit.More particularly, in the scope of, accompanying drawing open in the application and claim, multiple modification and improvement can be carried out to the building block of subject combination layout and/or layout.Except the distortion carried out building block and/or layout and improving, to those skilled in the art, other purposes also will be obvious.
Claims (7)
1. an intelligent electric meter carrier communication module test gimulator, it is characterized in that: comprise power purification unit, electric energy meter base table interface unit, carrier module interface unit, LV-PLC channel analogue unit, detecting unit and centralized control computer, described power purification unit and described LV-PLC channel analogue unit, carrier module interface unit connects respectively, described centralized control computer and described LV-PLC channel analogue unit, carrier module interface unit, electric energy meter base table interface unit connects respectively, described carrier module interface unit also with LV-PLC channel analogue unit, detecting unit connects respectively,
Described power purification unit be used for for this simulator inside provide electric energy, isolation interference noise and eliminate described in LV-PLC channel analogue unit produce carrier signal and noise on the impact of described carrier module interface unit; Described LV-PLC channel analogue unit is used for the simulation signal that described power purification unit exports being carried out to communication environment feature; Described carrier module interface unit is used for providing electric energy for the carrier module be connected with described carrier module interface unit, and realizes from described LV-PLC channel analogue unit to the communication link of described electric energy meter base table interface unit; Described electric energy meter base table interface unit is used for providing communication connection for the electric energy meter be connected with described electric energy meter base table interface unit; Described detecting unit is for testing described carrier communication module input and output signal parameter; Described centralized control computer is used for communicating to test described communication equipment and communicate with detection and control electric energy meter state parameter with described electric energy meter base table interface unit with carrier communication unit to the control of each channel characteristics simulation in described LV-PLC channel unit.
2. intelligent electric meter carrier communication module test gimulator according to claim 1, it is characterized in that: described power purification unit comprises the first order filter circuit and second level filter circuit that connect successively from civil power, second level filter circuit is connected to described carrier module interface unit, and described LV-PLC channel analogue unit is connected between first order filter circuit and second level filter circuit by carrier wave split circuit;
Described first order filter circuit is used for providing power supply for this simulator, and eliminates by impedance matching the interference noise that external power source brings to communication channel; Described second level filter circuit is used for providing power supply for described carrier module interface unit, and the carrier signal that produces of the LV-PLC channel analogue unit described in eliminating and noise are on the impact of described carrier module interface unit; The power frequency component that described carrier wave split circuit exports for separating of first order filter circuit and high frequency carrier signal of communication.
3. intelligent electric meter carrier communication module test gimulator according to claim 2, it is characterized in that: described LV-PLC channel analogue unit comprises and being all connected with centralized control computer and the concentrator signal loading module, noise load-on module, fading channel module, power line transmission module and the power line load blocks that connect successively from carrier wave split circuit, and described power line load blocks is connected to electric energy meter base table interface unit, carrier module interface unit and detecting unit respectively;
Described concentrator signal loading module is used for, in the electric power signal simulation concentrator instruction load produced by described centralized control computer exported to the first order filter circuit from described power purification unit, completing concentrator sends control command simulation to intelligent electric meter; The multicarrier communication signal that described noise load-on module is used for exporting to described concentrator signal loading module loads noise; The signal that described fading channel module is used for described noise load-on module exports carries out damped impedance simulation; Described power line transmission module is used for carrying out transfer impedance simulation to the output signal of described fading channel module; The signal that described power line load blocks is used for described power line transmission module exports carries out load impedance simulation.
4. intelligent electric meter carrier communication module test gimulator according to claim 1, it is characterized in that: described concentrator signal loading module comprises and connects serial communication interface, storage chip, D/A conversion chip and power amplifier successively, wherein said serial communication interface is connected to centralized control computer by RS232 interface, described power amplifier is connected to noise load-on module, and described power purification unit is connected between D/A conversion chip and power amplifier.
5. intelligent electric meter carrier communication module test gimulator according to claim 1, it is characterized in that: described carrier module interface emulates unit comprises the power supply noise injection circuit, protective circuit unit and the carrier module socket that connect successively from power purification unit, described carrier module socket connects LV-PLC channel analogue unit and electric energy meter base table interface unit, and described power supply noise injection circuit is connected with centralized control computer;
The power supply that described power supply noise injection circuit is used for providing to carrier module adds noise, to simulate the characteristics such as power supply noise noise in power supply that electric energy meter in side circuit provides for carrier module and power supply ripple noise; The power supply that described protective circuit unit is used for being supplied to for electric energy meter base table described carrier module interface unit provides overvoltage, overcurrent and electrostatic protection; Described carrier module socket is for transmitting the carrier (boc) modulated signals between LV-PLC channel analogue unit and electric energy meter base table interface unit.
6. intelligent electric meter carrier communication module test gimulator according to claim 1, it is characterized in that: described electric energy meter interface module comprises the electric appliance load module and electric energy meter base table socket that connect successively from centralized control computer, and described electric energy meter base table socket is connected to carrier module interface unit;
Described electric appliance load module is used for electric appliance load characteristic simulation user in reality being accessed to ammeter; Described electric energy meter base table socket is for transmitting the ammeter information between electric appliance load characteristic simulation and carrier module interface unit.
7. intelligent electric meter carrier communication module test gimulator according to claim 1, is characterized in that: described detecting unit is oscilloscope or frequency spectrograph.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104202067A (en) * | 2014-09-25 | 2014-12-10 | 国家电网公司 | Testing simulator for intelligent electric meter carrier communication module |
| CN105551231A (en) * | 2015-12-30 | 2016-05-04 | 国网浙江省电力公司电力科学研究院 | Collector detection device |
| CN106571851A (en) * | 2016-09-28 | 2017-04-19 | 华电智连信达科技（北京）有限公司 | Method and system for debugging intelligent ammeter carrier wave module |
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| CN107450043A (en) * | 2017-07-21 | 2017-12-08 | 国网江西省电力公司电力科学研究院 | Communication module of intelligent electric energy meter interface load capacity test device and method |
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| CN108631819A (en) * | 2017-03-15 | 2018-10-09 | 国网四川省电力公司电力科学研究院 | Power line carrier noise jamming tests system and test method |
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| CN104202067A (en) * | 2014-09-25 | 2014-12-10 | 国家电网公司 | Testing simulator for intelligent electric meter carrier communication module |
| CN105551231A (en) * | 2015-12-30 | 2016-05-04 | 国网浙江省电力公司电力科学研究院 | Collector detection device |
| CN105551231B (en) * | 2015-12-30 | 2019-03-26 | 国网浙江省电力公司电力科学研究院 | A kind of collector detection device |
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