CN104158564B - Low-voltage powerline carrier communication affects tentative module - Google Patents
Low-voltage powerline carrier communication affects tentative module Download PDFInfo
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- CN104158564B CN104158564B CN201410223501.6A CN201410223501A CN104158564B CN 104158564 B CN104158564 B CN 104158564B CN 201410223501 A CN201410223501 A CN 201410223501A CN 104158564 B CN104158564 B CN 104158564B
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Abstract
The present invention relates to carrier communication network experimental test module, specially low-voltage powerline carrier communication affects tentative module.The problem lacking LV-PLC channel model at present.This low-voltage powerline carrier communication affects tentative module, including a control computer, with control controls MCU circuit that computer is connected, with control the signal drive circuit that MCU circuit is connected, the control relay circuit being connected with signal drive circuit, the carrier wave that controlled by control relay circuit are affected loads switching circuit, load and switch indicating circuit.The present invention is according to low-voltage power distribution network characteristic, it is achieved that the impedance operator hardware simulation of carrier communication circuit.The length of analog carrier communication line, load impedance, inductance characteristic and capacitance characteristic can be distinguished, its reasonable in design, novelty, uniqueness, provide the foundation for low-voltage power carrier further investigation and the test of simulated field communication performance.
Description
Technical field
The present invention relates to carrier communication network experimental test module, specially low-voltage powerline carrier communication affects tentative module.
Background technology
Low-voltage power line communication circuit is solid and reliable, need not the features such as other investment construction communication line by it for low-voltage powerline carrier communication, have become as the important means of local communication in the widest low-voltage network communication mode of coverage and intelligent grid construction, be usually used in the carrier communication between acquisition terminal equipment (such as electric energy meter) and concentrator.But owing to low-voltage network opens to all low-voltage customers, circuit has the load of different impedance operator cut at any time and cut out, circuit is generally tree-shaped irradiation structure, network configuration is complicated and pattern is various, cause carrier communication channel impedance matching difficulties, have a strong impact on the reliability of low-voltage power carrier communication.Therefore, suitable LV-PLC channel model is set up significant to low-voltage power carrier further investigation and the test of simulated field communication performance.
Summary of the invention
The problem that the present invention solves to lack LV-PLC channel model at present, it is provided that a kind of low-voltage powerline carrier communication affects tentative module.
The present invention adopts the following technical scheme that realization: low-voltage powerline carrier communication affects tentative module, including a control computer, the control MCU circuit being connected with control computer, signal drive circuit, control relay circuit, carrier wave impact load switching circuit, load switching indicating circuit；
Described MCU circuit includes STM32F103 chip, and the input of this chip is connected with controlling computer；By controlling computer and send to STM32F103 chip the instruction of PC test software, STM32F103 chip is with the program judging the instruction of PC software；
Described signal drive circuit is by photoelectrical coupler EL817 and sealing in/and goes out high-speed converters 4094 and driving chip ULN2003 is connected in turn, and the input of photoelectrical coupler EL817 is connected with the output port of STM32F103 chip；
Described control relay circuit includes that multiple relay, one end of each relay are all connected with power supply, and the other end of each relay is connected with each line end of the output bus of driving chip ULN2003 respectively；
Described carrier wave impact load switching circuit includes resistor coupled in parallel branch road group, impedance parallel branch group, electric capacity parallel branch group and inductance series arm；Each parallel branch of resistor coupled in parallel branch road group is formed by normally opened contact and a resistant series of a relay；Each parallel branch of impedance parallel branch group is in series by normally opened contact and an impedance of a relay；Each parallel branch of electric capacity parallel branch group is formed by normally opened contact and a capacitances in series of a relay；Inductance series arm is in series by multiple inductance and the normally opened contact of a two ends relay in parallel of each inductance；Impedance parallel branch group and electric capacity parallel branch group are connected in parallel between two carrier signal transmission lines, and resistor coupled in parallel branch road group and inductance series arm are connected on carrier signal transmission line；Wherein the relay quantity in control relay circuit is at least equal to the inductance number sum of resistor coupled in parallel circuitry number, impedance parallel branch number, electric capacity parallel branch number and inductance series arm；
Described load switching indicating circuit comprises quantity circuitry number in parallel with a resistor, impedance parallel branch number, multiple light emitting diodes that electric capacity parallel branch number is identical with the inductance number sum of inductance series arm, one end of each light emitting diode is all connected with power supply, and the other end of each light emitting diode is connected with each line end of the output bus of ULN2003 chip respectively.
The resistance simulation carrier line different length in each branch road impact on carrier communication in resistor coupled in parallel branch road group；The impedance simulation carrier line different loads in each branch road impact on carrier communication in impedance parallel branch group；The impact on carrier communication of each inductance analogy carrier line different induction amount in inductance series arm；The capacitance simulation carrier line difference capacitance in each branch road impact on carrier communication in electric capacity parallel branch group.
Controlling the control centre that MCU is whole module, load switching circuit is the actuating mechanism of module.The instruction controlling the PC test software that MCU circuit receives control computer carries out the switching of loadtype, after controlling the instruction of MCU reception PC software, program judges which relay needs adhesive, then relay control signal is sent, control signal is given through Phototube Coupling EL817 and is sealed in and go out transducer 4094 and driving chip ULN2003, the 3.3V logical signal of MCU is converted into the relay control signal of 12V, the corresponding actuating of relay, carrier communication is affected test load incision, corresponding display lamp on indication panel is the most glittering, conveniently check load type and the gear of incision, now the two ends (i.e. the two ends of carrier-wave transmission line) of the laod network that load switching circuit is constituted i.e. simulate the network characteristic of a kind of electrical network.Each relay normally open contact can arbitrarily be arranged under PC software controls in opening and closing, and any opening and closing is combined, under simulation Different field carrier communication line environment, and the test of carrier communication performance.When carrier-wave transmission line (being equivalent to the live wire in reality and the zero line) two ends loading switching circuit are respectively connected to carrier wave frock electric energy meter and concentrator, by test or the data cases of the carrier electric energy meter observing the concentrator reading network other end, complete the test of carrier performance under this kind of laod network.Here, control the PC test software needed for computer and the instruction determining program needed for STM32F103 chip is that those skilled in the art easily realize.
The PC test software controlling computer in the present invention is realized by following flow process: 1) carrier wave affects on-test；2) carrier wave impact load whether is converted；3) if selecting to be that the load number in the different parallel branches of selection Different Effects load and series arm (i.e. selects influence amount gear；Screen showing, each load includes all of resistance, inductance, electric capacity and impedance, carries out selecting as drawn hook etc.)；4) to controlling MCU transmission switching command；If selecting no, also to controlling MCU transmission order.
In the present invention, the instruction determining program needed for STM32F103 chip is existing by following flow process: 1) on-test；2) system initialization；3) switching command is received；4) judge that order is the most complete；5) if complete, switching command is performed；If imperfect, it is not responding to.
The present invention is according to low-voltage power distribution network characteristic, it is achieved that the impedance operator hardware simulation of carrier communication circuit.The length of analog carrier communication line, load impedance, inductance characteristic and capacitance characteristic can be distinguished, switched by relay under the control of MCU, realize the different line impedances of the different distribution network of simulation, i.e. Different field carrier communication line environment, with carrier communication Testing Platform or the docking of correlation test equipment, carry out the test of carrier communication performance.Its reasonable in design, novelty, uniqueness, provide the foundation for low-voltage power carrier further investigation and the test of simulated field communication performance.
Accompanying drawing explanation
Fig. 1 is that low-voltage powerline carrier communication of the present invention affects tentative module block diagram；
Fig. 2 is the schematic diagram controlling MCU circuit；
Fig. 3 is the schematic diagram of signal drive circuit；
Fig. 4 is the schematic diagram of control relay circuit；
Fig. 5 is the schematic diagram of carrier wave impact load switching circuit；
Fig. 6 is the schematic diagram of load switching indicating circuit；
Fig. 7 is the flow chart of the PC test software controlling computer；
Fig. 8 is to control the instruction determining program flow chart needed for the STM32F103 chip in MCU circuit.
Detailed description of the invention
Low-voltage powerline carrier communication affects tentative module, including a control computer PC, and controls control MCU circuit 1 that computer is connected, signal drive circuit 2, control relay circuit 3, carrier wave impact load switching circuit), load switch indicating circuit 5；
Described MCU circuit 1 includes STM32F103 chip, and the input of this chip is connected with controlling computer；By controlling computer and send to STM32F103 chip the instruction of PC test software, STM32F103 chip is with the program judging the instruction of PC software；When being embodied as, STM32F103 chip need to configure corresponding peripheral circuit, and the configuration of peripheral circuit is as well known to those skilled in the art or easy realization；
Described signal drive circuit 2 is by photoelectrical coupler EL817 and sealing in/and goes out high-speed converters 4094 and driving chip ULN2003 is connected in turn, and the input of photoelectrical coupler EL817 is connected with the output port of STM32F103 chip；
Described control relay circuit (3) includes that multiple relay, one end of each relay are all connected with power supply, and the other end of each relay is connected with each line end of the output bus of driving chip ULN2003 respectively；
Described carrier wave impact load switching circuit (4) includes resistor coupled in parallel branch road group, impedance parallel branch group, electric capacity parallel branch group and inductance series arm；Each parallel branch of resistor coupled in parallel branch road group is formed by normally opened contact and a resistant series of a relay；Each parallel branch of impedance parallel branch group is in series by normally opened contact and an impedance of a relay；Each parallel branch of electric capacity parallel branch group is formed by normally opened contact and a capacitances in series of a relay；Inductance series arm is in series by multiple inductance and the normally opened contact of a two ends relay in parallel of each inductance；Impedance parallel branch group and electric capacity parallel branch group are connected in parallel between two carrier signal transmission lines, and resistor coupled in parallel branch road group and inductance series arm are connected on carrier signal transmission line；Wherein the relay quantity in control relay circuit (3) is at least equal to the inductance number sum of resistor coupled in parallel circuitry number, impedance parallel branch number, electric capacity parallel branch number and inductance series arm；
Described load switching indicating circuit (5) comprises quantity circuitry number in parallel with a resistor, impedance parallel branch number, multiple light emitting diodes that electric capacity parallel branch number is identical with the inductance number sum of inductance series arm, one end of each light emitting diode is all connected with power supply, and the other end of each light emitting diode is connected with each line end of the output bus of ULN2003 chip respectively.
Described resistor coupled in parallel branch road is 5, and impedance parallel branch number is 5, and electric capacity parallel branch number is 5, and the inductance number in inductance series arm is 5, and so, the quantity of relay is 20；Correspondingly, the photoelectrical coupler EL817 in signal drive circuit (2), seal in/and go out high-speed converters 4094 and driving chip ULN2003 is respectively three.In signal drive circuit (2), the connection between each chip or parts is known or those skilled in the art easily realize.Relay selects 14FF-012-1HS or 140FF-012-2ZS relay.
Claims (3)
1. a low-voltage powerline carrier communication affects tentative module, it is characterized in that, including a control computer (PC), control MCU circuit (1) being connected with control computer, signal drive circuit (2), control relay circuit (3), carrier wave impact load switching circuit (4)；
Described MCU circuit (1) includes STM32F103 chip, and the input of this chip is connected with controlling computer；By controlling computer and send to STM32F103 chip the instruction of PC test software, STM32F103 chip is with the program judging the instruction of PC software；
Described signal drive circuit (2) is by photoelectrical coupler EL817 and sealing in/and goes out high-speed converters 4094 and driving chip ULN2003 is connected in turn, and the input of photoelectrical coupler EL817 is connected with the output port of STM32F103 chip；
Described control relay circuit (3) includes that multiple relay, one end of each relay are all connected with power supply, and the other end of each relay is connected with each line end of the output bus of driving chip ULN2003 respectively；
Described carrier wave impact load switching circuit (4) includes resistor coupled in parallel branch road group, impedance parallel branch group, electric capacity parallel branch group and inductance series arm；Each parallel branch of resistor coupled in parallel branch road group is formed by normally opened contact and a resistant series of a relay；Each parallel branch of impedance parallel branch group is in series by normally opened contact and an impedance of a relay；Each parallel branch of electric capacity parallel branch group is formed by normally opened contact and a capacitances in series of a relay；Inductance series arm is in series by multiple inductance and the normally opened contact of a two ends relay in parallel of each inductance；Impedance parallel branch group and electric capacity parallel branch group are connected in parallel between two carrier signal transmission lines, and resistor coupled in parallel branch road group and inductance series arm are connected on carrier signal transmission line；Wherein the relay quantity in control relay circuit (3) is at least equal to the inductance number sum of resistor coupled in parallel circuitry number, impedance parallel branch number, electric capacity parallel branch number and inductance series arm.
Low-voltage powerline carrier communication the most according to claim 1 affects tentative module, characterized by further comprising load switching indicating circuit (5), described load switching indicating circuit (5) comprises quantity circuitry number in parallel with a resistor, impedance parallel branch number, multiple light emitting diodes that electric capacity parallel branch number is identical with the inductance number sum of inductance series arm, one end of each light emitting diode is all connected with power supply, and the other end of each light emitting diode is connected with each line end of the output bus of ULN2003 chip respectively.
3. require that the low-voltage powerline carrier communication described in 2 affects tentative module according to claim, it is characterised in that resistor coupled in parallel branch road is 5, and impedance parallel branch number is 5, electric capacity parallel branch number is 5, inductance number in inductance series arm is 5, and so, the quantity of relay is 20；Correspondingly, the photoelectrical coupler EL817 in signal drive circuit (2), seal in/and go out high-speed converters 4094 and driving chip ULN2003 is respectively three.
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| CN201410223501.6A CN104158564B (en) | 2014-05-23 | 2014-05-23 | Low-voltage powerline carrier communication affects tentative module |
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| CN104158564B true CN104158564B (en) | 2016-08-17 |
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| CN108347264B (en) * | 2017-12-29 | 2021-09-14 | 北京智芯微电子科技有限公司 | Impedance transformation equipment in power line broadband carrier communication test circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86105213A (en) * | 1986-08-24 | 1987-02-11 | 河南省科学院地理研究所 | Impedance component and special switch thereof with the binary ciruit modulation |
| CN2394255Y (en) * | 1999-06-25 | 2000-08-30 | 教育部教学仪器研究所 | Computer interface for teaching |
| CN101699691A (en) * | 2009-11-17 | 2010-04-28 | 重庆大学 | Multi-order multi-parameter adjustable electrical load device |
| CN101968643A (en) * | 2010-08-23 | 2011-02-09 | 中国矿业大学(北京) | PC/104-Plus multifunctional data acquisition card |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1236106A (en) * | 1999-04-05 | 1999-11-24 | 北京电力设备总厂 | Connection method for electric power carrier wave connection filter detection and its detection connector |
| US7129821B2 (en) * | 2004-08-20 | 2006-10-31 | International Business Machines Corporation | Communication systems and methods using microelectronics power distribution network |
| CN101902255B (en) * | 2010-04-02 | 2013-01-09 | 深圳市蓝可迪科技有限公司 | Simulation test device and method of power line carrier communication |
| CN202904359U (en) * | 2012-02-15 | 2013-04-24 | 天津瑞灵石油设备有限公司 | Low-voltage direct-current load redundancy control device |
| CN202872800U (en) * | 2012-11-16 | 2013-04-10 | 哈尔滨理工大学 | Portable power line carrier communication environment simulator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86105213A (en) * | 1986-08-24 | 1987-02-11 | 河南省科学院地理研究所 | Impedance component and special switch thereof with the binary ciruit modulation |
| CN2394255Y (en) * | 1999-06-25 | 2000-08-30 | 教育部教学仪器研究所 | Computer interface for teaching |
| CN101699691A (en) * | 2009-11-17 | 2010-04-28 | 重庆大学 | Multi-order multi-parameter adjustable electrical load device |
| CN101968643A (en) * | 2010-08-23 | 2011-02-09 | 中国矿业大学(北京) | PC/104-Plus multifunctional data acquisition card |
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Address after: 100031 West Chang'an Avenue, Xicheng District, Xicheng District, Beijing Co-patentee after: Measurement centre of Guo Wang Shanxi Province Utilities Electric Co. Patentee after: State Grid Corporation of China Address before: 100031 West Chang'an Avenue, Xicheng District, Xicheng District, Beijing Co-patentee before: Measurement centre of Guo Wang Shanxi Province Utilities Electric Co. Patentee before: State Grid Corporation of China |
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