CN205693669U - A kind of electric carrier apparatus for TT&C system - Google Patents

A kind of electric carrier apparatus for TT&C system Download PDF

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Publication number
CN205693669U
CN205693669U CN201620314013.0U CN201620314013U CN205693669U CN 205693669 U CN205693669 U CN 205693669U CN 201620314013 U CN201620314013 U CN 201620314013U CN 205693669 U CN205693669 U CN 205693669U
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China
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module
wire
coupling
circuit
modem
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CN201620314013.0U
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李泽滔
夏磊
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Guizhou University
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Guizhou University
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Abstract

The utility model discloses a kind of electric carrier apparatus for TT&C system, it includes control chip, modem and coupling circuit, control chip is connected with modem wire, modem digital signal output end is connected with D/A module wire, D/A module is connected with sending filtration module wire, send filtration module and be connected with sending amplifying circuit wire, send amplifying circuit and be connected with coupling circuit lead;Modem digital signal input end is connected with A/D module wire, and A/D module is connected with the module wire that accepts filter, and the module that accepts filter is connected with receiving amplifying circuit wire, receives amplifying circuit and is connected with coupling circuit lead, and coupling circuit is connected with power line;Solve the low voltage power line carrier of prior art to use TT&C system exists interference is strong, poor stability, there is the problems such as transmission range falls short of, and reliability big by load effect is the highest.

Description

A kind of electric carrier apparatus for TT&C system
Technical field
This utility model belongs to carrier communication, particularly relates to a kind of electric carrier apparatus for TT&C system.
Background technology
Low-voltage powerline carrier communication PLC(Power Line Communication) refer to utilize existing low-voltage distribution Net, as transmission medium, realizes data transmission and a kind of technology of information exchange.From the power line carrier communication twenties in 20th century Since release, PLC is effectively applied to power system by maturation, security protection controls, Street lamps control, kilowatt meter reading-out system etc. are many Field.It is good that it has channel reliability, and survivability is strong, small investment, it is not necessary to set up the advantages such as special circuit and by extensively Application.
As an application of communication technology, prior art is the most substantial amounts of has used PLC technology, due to Its practicality and huge market prospect, tried to be the first employing by each company rapidly.It utilizes existing AC power cord conduct Communication line, eliminates unpractical paving lineman's journey, with the obvious advantage.Power-line carrier communication is applied to TT&C system In, the communication mode of a kind of novel low cost is provided for industrial processes system and important living facilities system, but In TT&C system there is the problems such as strong, the poor stability of interference in data transmission, there is transmission range and falls short of, by load effect Big and that reliability is not high enough problem.
Utility model content
The technical problems to be solved in the utility model: provide a kind of electric carrier apparatus for TT&C system, to solve The low voltage power line carrier of prior art is used and is had in TT&C system that interference is strong, poor stability, there is transmission range not The problems such as enough long, big by load effect and reliability is the highest.
Technical solutions of the utility model:
A kind of electric carrier apparatus for TT&C system, it includes control chip, modem and coupling circuit, controls Coremaking sheet is connected with modem wire, and modem digital signal output end is connected with D/A module wire, D/A module It is connected with sending filtration module wire, sends filtration module and be connected with sending amplifying circuit wire, send amplifying circuit and couple Circuit lead connects;Modem digital signal input end is connected with A/D module wire, and A/D module is led with the module that accepts filter Line connects, and the module that accepts filter is connected with receiving amplifying circuit wire, receives amplifying circuit and is connected with coupling circuit lead.Coupling Circuit is connected with power line.
Described coupling circuit includes coupling transformer T1 and coupling electric capacity C51, coupling transformer T1 and couples electric capacity C51 even Connect, be parallel with moment suppression diode TVS2 at the outlet side two ends of coupling transformer T1, in the power line side of coupling circuit It is parallel with transient supression diode TVS3.
Described modem is digital adjustment demodulator, and it uses FPGA to constitute, and its model is EP2C5T144C8.
Described control chip is AVR control chip, and its model is ATmega16.
D/A module chip uses the AD9764 of AD company to constitute;A/D module chip uses the TLC5510 of TI company to constitute, And it is parallel with shunt capacitance at the power supply end of TLC5510 chip.
The module that accepts filter and transmission filtration module use low pass filter.
Sending amplifying circuit uses AD8009 to constitute, and receives amplifying circuit and uses OPA690 to constitute.
AccessPort interface, LED light and button it is integrated with on control chip.
The control method of described electric carrier apparatus, it include data send control, it comprises the steps:
Step 1, control chip receive the level signal from external key, generate order control frame in control chip, And send into the data segment sending order control frame to adjust in demodulator and carry out the transmission of signal and process;
Step 2, be adjusted demodulator processes after digital carrier signal first pass around D/A conversion, generate analog carrier Signal;In order to filter the high-frequency harmonic of waveform in analog carrier signal, after D/A changes, carry out low-pass filtering, then pass through Sending amplifying circuit and carrier signal is uploaded on electric lines of force by coupling circuit, the transmission completing carrier signal controls.
The control method of described electric carrier apparatus, it includes data receiver control, and it comprises the steps:
Step 1, receive carrier signal time, coupling circuit download carrier signal from power line channel;
Step 2, the module that accepts filter filter the clutter in carrier signal, send into and are converted to digital carrier letter in A/D module Number;
After step 3, digital carrier signal are demodulated in adjusting demodulator, restore the digital signal of transmitting terminal, send Enter control chip and determine whether the order of this node control;
Step 4, it is that the order of this node control then processes.
The beneficial effects of the utility model:
This utility model is capable of being applied in TT&C system by power-line carrier communication, for industrial processes System and important living facilities system provide a kind of novel low cost, convenience, reliable electric carrier apparatus.This utility model It is suitable for the power line carrier data transmission of TT&C system, improves power line carrier, PLC in measuring and control data by this utility model Reliability, real-time and stability in transmission.The communication module of this utility model design can be in conventional industrial environment Steady operation, it is possible to on-the-spot industrial data is sent to measurement and control host computer the most reliably by power line carrier communication mode, Accurately and real-time various control commands can be sent to each scene by power line carrier communication mode simultaneously and perform joint Point.
This utility model reduces engineering cost and the engineering difficulty of TT&C system, makes the accuracy of TT&C system, practicality Property, economy and motility be greatly increased, for improving the quality of production, energy-saving and cost-reducing providing condition;Solve prior art Low voltage power line carrier is used and is had in TT&C system that interference is strong, poor stability, there is transmission range and falls short of, loaded The problems such as impact is big and reliability is the highest.
Accompanying drawing illustrates:
Fig. 1 is this utility model apparatus structure schematic diagram;
Fig. 2 is this utility model coupled circuit configuration schematic diagram.
Detailed description of the invention:
A kind of electric carrier apparatus for TT&C system, it includes control chip, modem and coupling circuit, controls Coremaking sheet is connected with modem wire, and modem digital signal output end is connected with D/A module wire, D/A module It is connected with sending filtration module wire, sends filtration module and be connected with sending amplifying circuit wire, send amplifying circuit and couple Circuit lead connects;Modem digital signal input end is connected with A/D module wire, and A/D module is led with the module that accepts filter Line connects, and the module that accepts filter is connected with receiving amplifying circuit wire, receives amplifying circuit and is connected with coupling circuit lead.Coupling Circuit is connected with power line.
Described coupling circuit includes coupling transformer T1 and coupling electric capacity C51, coupling transformer T1 and couples electric capacity C51 even Connect, be parallel with moment suppression diode TVS2 at the outlet side two ends of coupling transformer T1, in the power line side of coupling circuit It is parallel with transient supression diode TVS3.
Moment suppression diode TVS2 is mainly voltage surge impact in absorbing circuit, and circuit is played protective effect.
Access and the disconnection of electric power built-in unit all may produce spike or instantaneous overvoltage, so accessing electricity The overvoltage protection of line of force one end is the most necessary, the most easily burns out circuit, uses transient supression two pole in this utility model Overvoltage from electric lines of force one end is eliminated by pipe TVS3, protects circuit.
Described modem is digital adjustment demodulator, and it uses FPGA to constitute, and its model is EP2C5T144C8.
This utility model employing fpga chip EP2C5T144C8 is as carrier communication modem, primarily to solve Certainly adjust capacity and performance issue, the CycloneII type of altera corp's low cost series 90nm Technology of demodulator Fpga chip EP2C5T144C8, is a fpga chip that cost performance is the highest in the market.There are 4608 logical blocks etc. Effect is 230,000 gates, 119808 bit memory, 2 phaselocked loops, 13 hardware multiplier modules, 26 embedded units, Each unit 4kbit, and support the configuration modes such as JTAG, AS, PS.This chip solves as adjusting be applicable to this utility model Tune device uses.
The control chip of system be use one piece of AVR control chip realize, due to AVR chip performance indications need and Adjust the fpga chip coupling of demodulator, be 3.3V owing to this utility model adjusting the I/O voltage of demodulator fpga chip, because of This this utility model needs to select the AVR chip of 3.3V powering mode, owing to needs design external key, institute in peripheral circuit Also it is key of the present utility model with the selection of the I/O quantity of AVR chip, is secondly exactly its internal timer number and program Whether the size of memorizer can meet the needs of power carrier.Comprehensive considerations above, this utility model is selected in AVR controller ATmega16, as control chip, it is the 8-bit microprocessor of a kind of high-performance, low-power consumption, and work clock is up to 16MIPS, The In-System Programmable Flash of 16K byte, the on-chip SRAM of EEPROM, 1K byte of 512 bytes, two 8 bit timing devices/meters Number devices, there is independent comparator and pre-divider function, a 16 bit timing devices/enumerator, have pre-divider catch and Comparing function.There are battery saving mode function, the TQFP encapsulation of 44 pins, 32 programmable I/O mouths, when 1MHZ, 3V, 25oC Normal power consumption is only 1.1mA.
According to the needs of carrier communication, D/A and A/D module is the important device of signal conversion in carrier communication modulation /demodulation Part, this utility model is selected the AD9764 of AD company as D/A conversion chip, is selected the TLC5510 of TI company to change as A/D Chip.Owing to the switching rate of AD9764 is the highest be 105MSPS, TLC5510 switching rate be 20MSPS, its sample rate is complete The needs of observing and controlling carrier communication system can be met.
In signal modulation sends, the importance of D/A module is only second to FGPA, AD9764 is high-speed d/a transducer, is one Individual can compatible 8,10,12, the D/A converter of 14, be particularly well-suited to the transmission of communication system.Owing to being poor Divide electric current output, it is therefore desirable to use operational amplifier that current signal is converted to voltage signal.Therefore this utility model uses High speed low distortion amplifier AD8009 is as sending amplifying circuit, and reduces interference by the mode of large area paving copper ground connection, improves The reliability of D/A conversion.
In the demodulating process receiving signal, A/D module is important device, and under regular situation, A/D module figure place is more Height, can obtain the signal to noise ratio that comparison is high, but when the signal to noise ratio of A/D module is higher than the signal to noise ratio of input signal, the highest position Number is without practical significance, and A/D module is made an uproar and calculated than by following formula
SNR=6.02n+1.76dB+10lg[fs/2B]
Wherein, fs is sample frequency, and B is A/D module bandwidth, and n is that A/D module changes figure place;
This utility model is considered when input carrier signal is less, is easily subject to digital display circuit interference, at power supply end The mode of shunt capacitance improves A/D module stability in parallel, reduces the interference of digital display circuit, improves the anti-of whole device Interference performance, increases data transmission credibility and the stability of device.
During practical communication, the intensity of carrier signal is always in change, in order to reach optimal A/D module samples Effect, carrier signal is mated before signal enters A/D module by this utility model, uses OPA690 in this utility model Operational amplifier mates with A/D module as receiving amplifying circuit, and OPA690 constitutes Voltage Feedback amplifier, to signal stabilization Gain has the biggest effect.
The module that accepts filter and transmission filtration module use low pass filter.
AccessPort interface, LED light and button it is integrated with on control chip.

Claims (8)

1. for an electric carrier apparatus for TT&C system, it includes control chip, modem and coupling circuit, and it is special Levying and be: control chip is connected with modem wire, modem digital signal output end is with D/A module wire even Connecing, D/A module is connected with sending filtration module wire, sends filtration module and is connected with sending amplifying circuit wire, sends and amplify Circuit is connected with coupling circuit lead;Modem digital signal input end is connected with A/D module wire, A/D module and reception Filtration module wire connects, and the module that accepts filter is connected with receiving amplifying circuit wire, receives amplifying circuit and leads with coupling circuit Line connects, and coupling circuit is connected with power line.
A kind of electric carrier apparatus for TT&C system the most according to claim 1, it is characterised in that: described coupling electricity Road includes that coupling transformer T1 and coupling electric capacity C51, coupling transformer T1 are connected, at coupling transformer T1 with coupling electric capacity C51 Outlet side two ends be parallel with moment suppression diode TVS2, coupling circuit power line side be parallel with transient supression two pole Pipe TVS3.
A kind of electric carrier apparatus for TT&C system the most according to claim 1, it is characterised in that: described modulatedemodulate Adjusting device is digital adjustment demodulator, and it uses FPGA to constitute, and its model is EP2C5T144C8.
A kind of electric carrier apparatus for TT&C system the most according to claim 1, it is characterised in that: described control core Sheet is AVR control chip, and its model is ATmega16.
A kind of electric carrier apparatus for TT&C system the most according to claim 1, it is characterised in that: D/A module core Sheet uses the AD9764 of AD company to constitute;A/D module chip uses the TLC5510 of TI company to constitute, and at TLC5510 chip Power supply end is parallel with shunt capacitance.
A kind of electric carrier apparatus for TT&C system the most according to claim 1, it is characterised in that: accept filter mould Block and transmission filtration module use low pass filter.
A kind of electric carrier apparatus for TT&C system the most according to claim 1, it is characterised in that: send and amplify electricity Road uses AD8009 to constitute, and receives amplifying circuit and uses OPA690 to constitute.
A kind of electric carrier apparatus for TT&C system the most according to claim 1, it is characterised in that: on control chip It is integrated with AccessPort interface, LED light and button.
CN201620314013.0U 2016-04-15 2016-04-15 A kind of electric carrier apparatus for TT&C system Active CN205693669U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620314013.0U CN205693669U (en) 2016-04-15 2016-04-15 A kind of electric carrier apparatus for TT&C system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620314013.0U CN205693669U (en) 2016-04-15 2016-04-15 A kind of electric carrier apparatus for TT&C system

Publications (1)

Publication Number Publication Date
CN205693669U true CN205693669U (en) 2016-11-16

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105915267A (en) * 2016-04-15 2016-08-31 贵州大学 Power line carrier device for measurement and control system and control method thereof
CN107072010A (en) * 2017-05-22 2017-08-18 合肥联信电源有限公司 A kind of safe voltage type emergence lighting lamp with carrier communication function

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105915267A (en) * 2016-04-15 2016-08-31 贵州大学 Power line carrier device for measurement and control system and control method thereof
CN107072010A (en) * 2017-05-22 2017-08-18 合肥联信电源有限公司 A kind of safe voltage type emergence lighting lamp with carrier communication function

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