CN103281101B - A kind of PLC automated test device - Google Patents
A kind of PLC automated test device Download PDFInfo
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- CN103281101B CN103281101B CN201310223548.8A CN201310223548A CN103281101B CN 103281101 B CN103281101 B CN 103281101B CN 201310223548 A CN201310223548 A CN 201310223548A CN 103281101 B CN103281101 B CN 103281101B
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Abstract
The invention discloses a kind of PLC automated test device, it is characterized in that, comprise power input interface, first signal isolation system, first data input/output interface, first high_voltage isolation system, secondary signal shielding system, second data input/output interface, second high_voltage isolation system, attenuation network, Power Entry Module, system control cpu and signal test system, system control cpu is connected with attenuation network with Power Entry Module respectively, power input interface is connected with secondary signal shielding system with the first signal isolation system respectively, attenuation network is connected with the second high_voltage isolation system with the first high_voltage isolation system respectively, first data input/output interface is connected with the first high_voltage isolation system with the first signal isolation system respectively, second data input/output interface is connected with the second high_voltage isolation system with secondary signal shielding system respectively, signal test system is used in connecting test two PLC device to be measured.PLC automated test device of the present invention can carry out automatic test to PLC device.
Description
Technical field
The present invention relates to the communications field, particularly relate to a kind of PLC automated test device.
Background technology
Along with developing rapidly of science and technology, equipment based on power line communication (PLC) technology obtains the application of more and more wider model, by utilizing the power line of transmission current as communications carrier, power line communication is made to have great convenience, as long as any place having supply socket in room, need not dial, just can enjoy the express network access of 4.5 ~ 45Mbps immediately, carry out browsing page, call, with the online film of viewing, thus realize collection data, voice, video, and electric power is in " four networks one platform " of one! In addition, can PLC be utilized to couple together the household electrical appliances such as the phone in house, TV, sound equipment, refrigerator, carry out centralized control, realize the dream of " wired home ".At present, PLC, mainly as a kind of access technology, provides the solution of broadband network " last one kilometer ", is applicable to residential quarter, school, hotel, the fields such as office building.
Power line communications apparatus (PLC) just will can be supplied to end user through strict test before dispatching from the factory, but do not have instrument factory prerequisite to supply testing scheme and the testing equipment of the power line communications apparatus (PLC) of complete set at present, so the testing equipment of power line communications apparatus (PLC) has become the current technical problem being badly in need of solving.
Summary of the invention
In order to solve the problems referred to above of prior art, be necessary to provide a kind of automated test device for PLC device.
The technical scheme that technical solution problem of the present invention provides is:
A kind of PLC automated test device, it comprises power input interface, first signal isolation system, first data input/output interface, first high_voltage isolation system, secondary signal shielding system, second data input/output interface, second high_voltage isolation system, attenuation network, Power Entry Module, system control cpu and signal test system, system control cpu is connected with attenuation network with Power Entry Module respectively, power input interface is connected with secondary signal shielding system with the first signal isolation system respectively, attenuation network is connected with the second high_voltage isolation system with the first high_voltage isolation system respectively, first data input/output interface is connected with the first high_voltage isolation system with the first signal isolation system respectively, second data input/output interface is connected with the second high_voltage isolation system with secondary signal shielding system respectively, signal test system is used in connecting test two PLC device to be measured.
Wherein, described first data input/output interface and the second data input/output interface are respectively used to be connected to two PLC device to be measured.
Wherein, described first signal isolation system and secondary signal shielding system are for isolating PLC network signal.
Wherein, described first high_voltage isolation system and the second high_voltage isolation system are for isolating the high-voltage signal in PLC signal.
Wherein, described attenuation network is for simulating the transmission environment of PLC signal.
Compared with prior art, PLC automated test device of the present invention is by the signal transmission environment of attenuation network simulation reality, and tested PLC device by the means of testing of automation, the early stage decreasing PLC device verifies workload and testing time.
Accompanying drawing explanation
Fig. 1 is the theory diagram of PLC automated test device of the present invention.
Fig. 2 is the test flow chart of PLC automated test device of the present invention.
Embodiment
As shown in Figure 1, PLC automated test device of the present invention comprises power input interface, the first signal isolation system, the first data input/output interface, the first high_voltage isolation system, secondary signal shielding system, the second data input/output interface, the second high_voltage isolation system, attenuation network, Power Entry Module, system control cpu and signal test system.System control cpu is connected with attenuation network with Power Entry Module respectively.Power input interface is connected with secondary signal shielding system with the first signal isolation system respectively.Attenuation network is connected with the second high_voltage isolation system with the first high_voltage isolation system respectively.First data input/output interface is connected with the first high_voltage isolation system with the first signal isolation system respectively.Second data input/output interface is connected with the second high_voltage isolation system with secondary signal shielding system respectively.Signal test system is used for two PLC device in connecting test.
First signal isolation system and secondary signal shielding system, for isolating PLC network signal, prevent two PLC device from being connected by power input interface.First high_voltage isolation system and the second high_voltage isolation system for isolating the high-voltage signal in PLC signal, thus isolate PLC network signal to attenuation network.Attenuation network is for simulating the transmission environment of PLC signal.System control cpu is used for controlling the attenuation degree of attenuation network.Signal test system for testing the signal strength signal intensity of two PLC device, thus judges signal attenuation between two PLC device whether in rational scope, thus judge whether qualified.
Because PLC device wants two or more monomer could realize the transmission of data, that is want two or more PLC device synchronously to form the communication that a local area network (LAN) realizes data afterwards, this just requires to ensure that when testing two PLC device could realize test after synchronous.Therefore, when adopting automated test device of the present invention to test, two PLC device are received the first data input/output interface and the second data input/output interface respectively, and two PLC device are all connected with signal test system.Power input interface is for accessing power supply, and power supply powers to two PLC device respectively by the first signal isolation system and secondary signal shielding system.Two PLC device in same network can be carried out synchronously automatically, at this moment system control cpu control attenuation network decay to 0dB, make to carry out data transmission test by network interface between two PLC, the pad value that system control cpu controls attenuation network is increased to 60dB gradually from 0dB, detect in this impact of interval decay on PLC device Signal transmissions by signal test system, if do not affect by test, if transfer of data has impact, test will do not passed through to transfer of data.
As shown in Figure 2, comprise the steps: when PLC automated test device of the present invention is tested
Step 1: when PLC automated test device, the pad value of attenuation network can be defined into 0dB by system control cpu, and at this moment the pad value of signal isolation system can at more than 70dB, to ensure that two power line communications apparatus can not be undertaken synchronously by this path.
Step 2: when PLC device electrifying startup can be undertaken synchronously by this path search of attenuation network the other side automatically.When carrying out automatic synchronization when consolidated network environment, when not at consolidated network environment, (pad value can be greater than 70dB) can not be synchronous.If can not be synchronous, then system control cpu can check the pad value of attenuation network.
Step 3: after two power line communications apparatus are synchronous, carry out flow rate test.
The pad value that step 4:CPU control system controls attenuation network increases gradually, detects the flow performance performance of power line communications apparatus under differential declines environment with this.
Step 5: adopt signal test system to carry out flow rate test while attenuation network increases pad value gradually.
Step 6: terminate test job when the pad value of attenuation network reaches 60dB.
Compared with prior art, PLC automated test device of the present invention is by the signal transmission environment of attenuation network simulation reality, and tested PLC device by the means of testing of automation, the early stage decreasing PLC device verifies workload and testing time.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (4)
1. a power line communication automated test device, it is characterized in that, comprise power input interface, first signal isolation system, first data input/output interface, first high_voltage isolation system, secondary signal shielding system, second data input/output interface, second high_voltage isolation system, attenuation network, system control cpu and signal test system, system control cpu is connected with attenuation network with power input interface respectively, power input interface is connected with secondary signal shielding system with the first signal isolation system respectively, attenuation network is connected with the second high_voltage isolation system with the first high_voltage isolation system respectively, first data input/output interface is connected with the first high_voltage isolation system with the first signal isolation system respectively, second data input/output interface is connected with the second high_voltage isolation system with secondary signal shielding system respectively, signal test system is used in connecting test two power line communications apparatus to be measured, wherein, first data input/output interface and the second data input/output interface are respectively used to be connected to two power line communications apparatus to be measured.
2. power line communication automated test device according to claim 1, is characterized in that, described first signal isolation system and secondary signal shielding system are for isolating power line communication network signal.
3. power line communication automated test device according to claim 1, is characterized in that, described first high_voltage isolation system and the second high_voltage isolation system are for isolating the high-voltage signal in electric-power wire communication signal.
4. power line communication automated test device according to claim 1, is characterized in that, described attenuation network is for simulating the transmission environment of electric-power wire communication signal.
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| CN201310223548.8A CN103281101B (en) | 2013-06-03 | 2013-06-03 | A kind of PLC automated test device |
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| CN201310223548.8A CN103281101B (en) | 2013-06-03 | 2013-06-03 | A kind of PLC automated test device |
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| CN103281101B true CN103281101B (en) | 2016-03-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110995314A (en) * | 2019-12-05 | 2020-04-10 | 国网天津市电力公司电力科学研究院 | Low-voltage broadband power line carrier communication comprehensive test system |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104617984B (en) * | 2015-03-04 | 2017-02-22 | 深圳市汇思易达科技有限公司 | Test instrument for PLC (power line communication) or EoC (Ethernet over coax) |
| CN105024731B (en) * | 2015-08-26 | 2017-06-16 | 上海斐讯数据通信技术有限公司 | A kind of power line network product testing system |
| CN105307196B (en) * | 2015-09-25 | 2018-11-06 | 国网天津市电力公司 | A kind of acquisition terminal wireless public network communication test system and method |
| CN107181504B (en) * | 2017-07-12 | 2019-08-30 | 武汉盛帆电子股份有限公司 | Power wire broadband carrier communication test method and device |
| CN114421996B (en) * | 2022-03-28 | 2022-07-15 | 欧智通科技股份有限公司 | Anti-attenuation test system of PLC signal |
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