CN201904780U

CN201904780U - PLC communication module

Info

Publication number: CN201904780U
Application number: CN2010206821358U
Authority: CN
Inventors: 陈立新
Original assignee: DONGGUAN HUAYE XINKE ELECTRONIC TECHNOLOGY Co Ltd
Current assignee: DONGGUAN HUAYE XINKE ELECTRONIC TECHNOLOGY Co Ltd
Priority date: 2010-12-27
Filing date: 2010-12-27
Publication date: 2011-07-20
Anticipated expiration: 2020-12-27

Abstract

The utility model relates to a communication module technology, in particular to a PLC (Power Line Carrier) communication module, which comprises a central control circuit, a synchronous signal processing circuit, a signal receiving circuit, a signal transmitting circuit, an external interface circuit, an external control circuit, and a power supply circuit for supplying a power supply, wherein the signal receiving circuit comprises a voltage-multiplying unit for doubly magnifying data signals and a voltage-dividing unit. In the PLC communication module, the data signals loaded from a power line can receive doubly magnification and voltage division sequentially by the signal receiving circuit via the voltage-multiplying unit and the voltage-dividing unit, to enable that most of interference signals are eliminated before being inputted to the central control circuit, so that the influence to the detection or demodulation of the central control circuit can be reduced, and the PLC communication module has higher reliability and stability.

Description

A kind of electric line carrier communication module

Technical field

The utility model relates to the communication module technology, relates in particular to a kind of electric line carrier communication module.

Background technology

Electric line carrier communication is meant and utilizes existing power line, the analog or digital signal carried out the technology of high-speed transfer by carrier system.Because electric line carrier communication has that message transmission is reliable and stable, route rationally, simultaneously multiplexing remote motion signal, do not need characteristics such as track investment, the electric line carrier communication technology is as emerging mechanics of communication, be applied to every field just gradually, for example: in the Smart Home field, usually electrification line carrier communication module realizes communicating by letter between main control system and the electric equipments such as light fixture, mains switch.

At present, the electric line carrier communication module mainly comprises central control circuit (MCU), synchronization signal processing circuit, signal receiving circuit, signal transmission circuit, external interface circuit, is used to foregoing circuit that the power circuit of power supply is provided; Central control circuit has functions such as modulation, demodulation, in use, central control circuit can load the data-signal that obtains on the power line by signal receiving circuit, can will need data signals transmitted to be loaded on the power line by signal transmission circuit, can carry out exchanges data and corresponding control by external equipments such as external interface circuit and main control system, electric equipment or external control circuit; And synchronization signal processing circuit is used for synchronizing signal is imported central control circuit.

But, the simple filter circuit that the signal receiving circuit of electric line carrier communication module is made up of resistance, electric capacity, inductance mostly in the prior art, it will load the data-signal that obtains on the power line, only just input to central control circuit through simple filtering, this data-signal that may cause inputing to central control circuit has more interference signal, influence the detection or the demodulation of central control circuit, and then reduce the reliability and stability of whole electric line carrier communication module.

Summary of the invention

The purpose of this utility model is to provide a kind of reliability high and stable high electric line carrier communication module at the deficiencies in the prior art.

The purpose of this utility model realizes by following technical measures: a kind of electric line carrier communication module, it includes central control circuit, synchronization signal processing circuit, signal receiving circuit, signal transmission circuit, external interface circuit, external control circuit, be used to provide the power circuit of power supply, the output of synchronization signal processing circuit is connected with the synchronous signal input end of central control circuit, the input of signal transmission circuit is connected with the data-signal output of central control circuit, central control circuit is connected with external control circuit by external interface circuit, described signal receiving circuit includes the multiplication of voltage unit that is used for double amplified data signal, partial pressure unit, the input of multiplication of voltage unit is connected with power line, the output of multiplication of voltage unit is connected with the input of partial pressure unit, and the output of partial pressure unit is connected with the data-signal input of central control circuit.

Be connected with the capacitor C 4 that is used for the isolated DC electricity between the input of described multiplication of voltage unit and the power line, capacitor C 4 one ends are connected with power line, and capacitor C 4 other ends are connected with the input of multiplication of voltage unit.

Described multiplication of voltage unit comprises diode D1, diode D2, the input of the just very multiplication of voltage unit of diode D2, and the negative pole of diode D2 is the output of multiplication of voltage unit, the negative pole of diode D1 is connected with the positive pole of diode D2, the plus earth of diode D1.

Described partial pressure unit comprises resistance R 6, resistance R 14, and resistance R 14 1 ends are the input of partial pressure unit, and resistance R 14 other ends are the output of partial pressure unit, and resistance R 6 one ends are connected with resistance R 14 1 ends, resistance R 6 other end ground connection.

Described synchronization signal processing circuit comprises resistance R 1, resistance R 2, resistance R 3, resistance R 10, triode Q1, triode Q2, resistance R 1 one ends are the input of synchronization signal processing circuit, resistance R 1 one ends are connected with power line, resistance R 1 other end and resistance R 10 1 ends, the base stage of triode Q2 connects, the collector electrode of triode Q2 and resistance R 2 one ends, the base stage of triode Q1 connects, the current collection of triode Q1 is the output of synchronization signal processing circuit very, resistance R 3 one ends are connected with the collector electrode of triode Q1, resistance R 2 other ends, resistance R 3 other ends all are connected with the power supply of power circuit, resistance R 10 other ends, the emitter of triode Q2, the equal ground connection of the emitter of triode Q1.

Described signal transmission circuit comprises resistance R 7, resistance R 8, capacitor C 8, inductance L 2, bidirectional triode thyristor Q5, resistance R 8 one ends are the input of signal transmission circuit, resistance R 8 other ends are connected with the 3rd pin of bidirectional triode thyristor Q5, the 1st pin ground connection of bidirectional triode thyristor Q5, the 2nd pin of bidirectional triode thyristor Q5 is connected with resistance R 7 one ends, capacitor C 8 one ends, resistance R 7 other ends, capacitor C 8 other ends are connected with inductance L 2 one ends, inductance L 2 other ends are the output of signal transmission circuit, and inductance L 2 other ends are connected with power line.

Described external control circuit comprises key circuit, light adjusting circuit, switching circuit, USB change-over circuit, and key circuit, light adjusting circuit, switching circuit, USB change-over circuit all are connected with central control circuit by external interface circuit.

Described USB change-over circuit comprises conversion processing unit, two-way isolated location, and conversion processing unit is connected with external interface circuit by two-way isolated location.

The utility model beneficial effect is: the utility model includes central control circuit, synchronization signal processing circuit, signal receiving circuit, signal transmission circuit, external interface circuit, external control circuit, is used to provide the power circuit of power supply, signal receiving circuit includes multiplication of voltage unit, the partial pressure unit that is used for double amplified data signal, the input of multiplication of voltage unit is connected with power line, the output of multiplication of voltage unit is connected with the input of partial pressure unit, and the output of partial pressure unit is connected with the data-signal input of central control circuit.Signal receiving circuit of the present utility model can be carried out successively the double amplification of amplitude, voltage division processing to loaded data signal from power line respectively by multiplication of voltage unit, partial pressure unit, thereby most interference signal is eliminated, input to central control circuit again, reduce influence, make the electric line carrier communication module have higher reliability and stability central control circuit detection or demodulation.

Description of drawings

Fig. 1 is the frame principle figure of a kind of electric line carrier communication module of the utility model.

Fig. 2 is the central control circuit of a kind of electric line carrier communication module of the utility model and the circuit theory diagrams of external interface circuit.

Fig. 3 is the synchronization signal processing circuit of a kind of electric line carrier communication module of the utility model and the circuit theory diagrams of signal transmission circuit.

Fig. 4 is the signal receiving circuit of a kind of electric line carrier communication module of the utility model and the circuit theory diagrams of power circuit.

Fig. 5 is the key circuit of a kind of electric line carrier communication module of the utility model and the circuit theory diagrams of switching circuit.

Fig. 6 is the circuit theory diagrams of the light adjusting circuit of a kind of electric line carrier communication module of the utility model.

Fig. 7 is the circuit theory diagrams of the USB change-over circuit of a kind of electric line carrier communication module of the utility model.

In Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, include:

1---central control circuit 2---synchronization signal processing circuit

3---signal receiving circuit 31---multiplication of voltage unit

32---partial pressure unit 4---signal transmission circuit

5---external interface circuit 6---power circuit

7---external control circuit 71---key circuit

72---switching circuit 731---conversion processing unit

732---two-way isolated location.

Embodiment

Below in conjunction with accompanying drawing the utility model is further described.

A kind of electric line carrier communication module of the present utility model, shown in Fig. 1～7, include central control circuit 1, synchronization signal processing circuit 2, signal receiving circuit 3, signal transmission circuit 4, external interface circuit 5, external control circuit 7, be used to provide the power circuit 6 of power supply, the output of synchronization signal processing circuit 2 is connected with the synchronous signal input end of central control circuit 1, make synchronization signal processing circuit 2 synchronizing signal can be imported central control circuit 1, the input of signal transmission circuit 4 is connected with the data-signal output of central control circuit 1, signal transmission circuit 4 can be loaded into the data-signal (analog or digital signal) of central control circuit 1 output on the power line, central control circuit 1 is connected with external control circuit 7 by external interface circuit 5, makes central control circuit 1 carry out exchanges data or control corresponding by external interface circuit 5 and external control circuit 7.

Signal receiving circuit 3 includes the multiplication of voltage unit 31 that is used for double amplified data signal, partial pressure unit 32, the input of multiplication of voltage unit 31 is connected with power line, make the multiplication of voltage unit 31 can be from loading data signal on the power line (analog or digital signal), the output of multiplication of voltage unit 31 is connected with the input of partial pressure unit 32, after making the double amplification of amplitude of data-signal through multiplication of voltage unit 31, import partial pressure unit 32 again, the output of partial pressure unit 32 is connected with the data-signal input of central control circuit 1, make data-signal through after the voltage division processing of partial pressure unit 32, input to the data-signal input of central control circuit 1 again.

Be connected with the capacitor C 4 that is used for the isolated DC electricity between the input of multiplication of voltage unit 31 and the power line, capacitor C 4 one ends are connected with power line, more particularly, capacitor C 4 one ends are that the RC pressure unit by power circuit 6 is connected with the L line of power line, capacitor C 4 other ends are connected with the input of multiplication of voltage unit 31, capacitor C 4 can be isolated the d-c component of loaded data signal from power line, and the data-signal after the isolation is imported multiplication of voltage unit 31 again.

Multiplication of voltage unit 31 comprises diode D1, diode D2, the input of the just very multiplication of voltage unit 31 of diode D2, the negative pole of diode D2 is the output of multiplication of voltage unit 31, the negative pole of diode D1 is connected with the positive pole of diode D2, the plus earth of diode D1 (GND), the multiplication of voltage unit 31 that diode D1 and diode D2 form can carry out the processing of the double amplification of amplitude to data-signal.

Partial pressure unit 32 comprises resistance R 6, resistance R 14, resistance R 14 1 ends are the input of partial pressure unit 32, resistance R 14 other ends are the output of partial pressure unit 32, resistance R 6 one ends are connected with resistance R 14 1 ends, resistance R 6 other end ground connection, the partial pressure unit 32 that resistance R 6 and resistance R 14 are formed can be carried out voltage division processing to the data-signal of input, and is converted to the signal that meets central control circuit 1 detection or demodulation.

Synchronization signal processing circuit 2 comprises resistance R 1, resistance R 2, resistance R 3, resistance R 10, triode Q1, triode Q2, resistance R 1 one ends are the input of synchronization signal processing circuit 2, resistance R 1 one ends are connected with power line, more particularly, the input of synchronization signal processing circuit 2 is to be connected with the L line of power line, resistance R 1 other end and resistance R 10 1 ends, the base stage of triode Q2 connects, the collector electrode of triode Q2 and resistance R 2 one ends, the base stage of triode Q1 connects, the current collection of triode Q1 is the output of synchronization signal processing circuit 2 very, resistance R 3 one ends are connected with the collector electrode of triode Q1, resistance R 2 other ends, resistance R 3 other ends all are connected with the power supply (VCC) of power circuit 6, resistance R 10 other ends, the emitter of triode Q2, the equal ground connection of the emitter of triode Q1.Synchronization signal processing circuit 2 operation principles are: resistance R 1 one ends extract synchronizing signal from the L line of power line, after the voltage division processing of synchronizing signal through resistance R 1 and resistance R 10, carry out anti-phase processing by triode Q2 again, carry out the anti-phase processing of secondary by triode Q1 at last, make the synchronizing signal of input central control circuit 1 keep identical with the phase place of the sinusoidal signal of power line.

Signal transmission circuit 4 comprises resistance R 7, resistance R 8, capacitor C 8, inductance L 2, bidirectional triode thyristor Q5, resistance R 8 one ends are the input of signal transmission circuit 4, resistance R 8 other ends are connected with the 3rd pin of bidirectional triode thyristor Q5, the 1st pin ground connection of bidirectional triode thyristor Q5, the 2nd pin of bidirectional triode thyristor Q5 and resistance R 7 one ends, capacitor C 8 one ends connect, resistance R 7 other ends, capacitor C 8 other ends are connected with inductance L 2 one ends, inductance L 2 other ends are the output of signal transmission circuit 4, inductance L 2 other ends are connected with power line, more particularly, the output of signal transmission circuit 4 is to be connected with the L line of power line, wherein, and the N line ground connection of power line.The operation principle of signal transmission circuit 4 is: the energy of power line is stored by capacitor C 8 and inductance L 2, the data-signal of central control circuit 1 output is through after the resistance R 8, promotion bidirectional triode thyristor Q5 is discharged into the energy of capacitor C 8 and inductance L 2 storages on the power line, realizes that the data-signal of central control circuit 1 output is loaded on the power line; The effect of resistance R 7 is the discharge process after the energy to 2 storages of capacitor C 8 and inductance L cuts off the power supply, to guarantee the fail safe of circuit.

Power circuit 6 comprises the circuit units such as RC pressure unit that composed in parallel by resistance R 5 and capacitor C 3, the operation principle of power circuit 6 is: after carrying out step-down from the voltage of power line input through the RC pressure unit, carry out isolation processing by inductance L 1, noise on the power line is partly carried out filtering, pass through again by diode D3, the rectification unit that voltage stabilizing didoe D4 forms carries out rectification to be handled, the power supply of output+12V, after the power supply process resistance R 9 of+12V and the voltage stabilizing and smoothing processing that capacitor C 11 is carried out, the voltage stabilizing of carrying out secondary through voltage stabilizing didoe D5 is handled and is made voltage range meet the input requirement of back-end circuit again, then, process is by inductance L 3, the L type filter unit that capacitor C 9 and capacitor C 12 are formed carries out the stable of secondary, after filtering reaches and smoothly waits processing, input supply voltage conversion chip IC2, the power supply of supply voltage conversion chip IC2 output, process is by resistance R 13, the ∏ type filter unit that capacitor C 10 and capacitor C 13 are formed carries out last voltage stabilizing and Filtering Processing, forms to meet the power supply (VCC) that back-end circuit requires fully.

External control circuit 7 comprises key circuit 71, light adjusting circuit, switching circuit 72, USB change-over circuit 73, and key circuit 71, light adjusting circuit, switching circuit 72, USB change-over circuit all are connected with central control circuit 1 by external interface circuit 5.External interface circuit 5 comprises link KEY_1, KEY_2, KEY_3, KEY_4, TRIAC_A, TRIAC_B, RELAY_A, RELAY_B, RX, TX.

Key circuit 71 is connected with central control circuit 1 by link KEY_1, KEY_2, KEY_3, the KEY_4 of external interface circuit 5, change level state with central control circuit 1 linkage section by whether pressing of button, thereby transmit relevant switching information.

Light adjusting circuit is connected with central control circuit 1 by link TRIAC_A, the TRIAC_B of external interface circuit 5, makes central control circuit 1 can control light adjusting circuit, reaches the purpose of light modulation.

Switching circuit 72 is connected with central control circuit 1 by link RELAY_A, the RELAY_B of external interface circuit 5, makes central control circuit 1 can pass through control switch circuit 72 and controls the various electric equipments relevant with switching circuit 72.

The USB change-over circuit comprises conversion processing unit 731, two-way isolated location 732, conversion processing unit 731 is connected with external interface circuit 5 by two-way isolated location 732, two-way isolated location 732 is connected with central control circuit 1 by link RX, the TX of external interface circuit 5, makes central control circuit 1 carry out exchanges data by USB change-over circuit and external equipment (as computer) or circuit.

Wherein, central control circuit 1 adopts single-chip microcomputer IC1, and its model is PIC16F648, and single-chip microcomputer IC1 is that the data-signal of 1～200KHz can both be finished detection accurately to incoming frequency; Triode Q1, triode Q2, triode Q3, triode Q4 are NPN type triode; Certainly, the model and the parameter of above-mentioned electronic devices and components are only for reference, and when specifically implementing the technical program, its model and parameter value can be made amendment according to actual environment.

Signal receiving circuit 3 of the present utility model can be carried out successively the double amplification of isolated DC, amplitude, voltage division processing etc. to loaded data signal from power line, thereby most interference signal is eliminated, input to central control circuit 1 again, reduce influence, make the electric line carrier communication module have higher reliability and stability central control circuit 1 detection or demodulation.Certainly, the utility model can be widely used in the communication system in fields such as Smart Home, the carrier of its data is the power line of 100～220V, 50Hz, each power cycle transmits 4 digital signal, per two power cycle go out to send complete data, with 8 complete data is a transmission unit, thereby realizes the transmission of the data-signal of equipment room.

Should be noted that at last; above embodiment is only in order to the explanation the technical solution of the utility model; but not to the restriction of the utility model protection range; although the utility model has been done to explain with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can make amendment or be equal to replacement the technical solution of the utility model, and not break away from the essence and the scope of technical solutions of the utility model.

Claims

1. electric line carrier communication module, it includes central control circuit, synchronization signal processing circuit, signal receiving circuit, signal transmission circuit, external interface circuit, external control circuit, be used to provide the power circuit of power supply, the output of synchronization signal processing circuit is connected with the synchronous signal input end of central control circuit, the input of signal transmission circuit is connected with the data-signal output of central control circuit, central control circuit is connected with external control circuit by external interface circuit, it is characterized in that: described signal receiving circuit includes the multiplication of voltage unit that is used for double amplified data signal, partial pressure unit, the input of multiplication of voltage unit is connected with power line, the output of multiplication of voltage unit is connected with the input of partial pressure unit, and the output of partial pressure unit is connected with the data-signal input of central control circuit.

2. electric line carrier communication module according to claim 1, it is characterized in that: be connected with the capacitor C 4 that is used for the isolated DC electricity between the input of described multiplication of voltage unit and the power line, capacitor C 4 one ends are connected with power line, and capacitor C 4 other ends are connected with the input of multiplication of voltage unit.

3. electric line carrier communication module according to claim 1 and 2, it is characterized in that: described multiplication of voltage unit comprises diode D1, diode D2, the input of the just very multiplication of voltage unit of diode D2, the negative pole of diode D2 is the output of multiplication of voltage unit, the negative pole of diode D1 is connected with the positive pole of diode D2, the plus earth of diode D1.

4. electric line carrier communication module according to claim 1 and 2, it is characterized in that: described partial pressure unit comprises resistance R 6, resistance R 14, resistance R 14 1 ends are the input of partial pressure unit, resistance R 14 other ends are the output of partial pressure unit, resistance R 6 one ends are connected with resistance R 14 1 ends, resistance R 6 other end ground connection.

5. electric line carrier communication module according to claim 1, it is characterized in that: described synchronization signal processing circuit comprises resistance R 1, resistance R 2, resistance R 3, resistance R 10, triode Q1, triode Q2, resistance R 1 one ends are the input of synchronization signal processing circuit, resistance R 1 one ends are connected with power line, resistance R 1 other end and resistance R 10 1 ends, the base stage of triode Q2 connects, the collector electrode of triode Q2 and resistance R 2 one ends, the base stage of triode Q1 connects, the current collection of triode Q1 is the output of synchronization signal processing circuit very, resistance R 3 one ends are connected with the collector electrode of triode Q1, resistance R 2 other ends, resistance R 3 other ends all are connected with the power supply of power circuit, resistance R 10 other ends, the emitter of triode Q2, the equal ground connection of the emitter of triode Q1.

6. electric line carrier communication module according to claim 1, it is characterized in that: described signal transmission circuit comprises resistance R 7, resistance R 8, capacitor C 8, inductance L 2, bidirectional triode thyristor Q5, resistance R 8 one ends are the input of signal transmission circuit, resistance R 8 other ends are connected with the 3rd pin of bidirectional triode thyristor Q5, the 1st pin ground connection of bidirectional triode thyristor Q5, the 2nd pin of bidirectional triode thyristor Q5 and resistance R 7 one ends, capacitor C 8 one ends connect, resistance R 7 other ends, capacitor C 8 other ends are connected with inductance L 2 one ends, inductance L 2 other ends are the output of signal transmission circuit, and inductance L 2 other ends are connected with power line.

7. electric line carrier communication module according to claim 1, it is characterized in that: described external control circuit comprises key circuit, light adjusting circuit, switching circuit, USB change-over circuit, and key circuit, light adjusting circuit, switching circuit, USB change-over circuit all are connected with central control circuit by external interface circuit.

8. electric line carrier communication module according to claim 7 is characterized in that: described USB change-over circuit comprises conversion processing unit, two-way isolated location, and conversion processing unit is connected with external interface circuit by two-way isolated location.