CN115913285B - Power line carrier communication system - Google Patents
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Abstract
The invention relates to the technical field of power carrier communication, and provides a power carrier communication system which comprises a coupling module and a singlechip, wherein the coupling module is connected with a power line, a line switch control module is arranged in the coupling module and is connected with the singlechip, the line switch control module is communicated with an internal line of the coupling module when the coupling module is communicated with the power line, and the line switch control module is disconnected with the internal line of the coupling module when the coupling module is not communicated with the power line. Through the technical scheme, the problems that whether carrier communication is carried out or not, the carrier coupling circuit is in a working state, apparent power consumption is large, and electric energy loss is large in the prior art are solved.
Description
Technical Field
The invention relates to the technical field of power carrier communication, in particular to a power carrier communication system.
Background
With the gradual propulsion of the smart grid, the application of the power carrier wave in the power grid is gradually expanded. Various types of products have been developed, and power carriers are used as communication means, and power carrier communication technology is also used in vehicle instruments to transmit signals and power.
In the prior art of power line carrier communication, the distance of carrier communication is limited due to attenuation of carrier signals, and the data volume of carrier communication nodes in the same local area network is also limited. In order to improve the communication distance and the reliability of communication, it is now common practice to increase the transmission power of the carrier, which increases the power consumption of the carrier communication, i.e. the apparent power consumption of the coupling circuit is larger; in addition, in the prior art, no matter whether carrier communication is performed or not, the carrier coupling circuit is in a working state, the apparent power consumption is large, the line power consumption is large, the electric energy loss is large, and the current development direction of energy conservation and consumption reduction is not met.
Disclosure of Invention
The invention provides a power carrier communication system, which solves the problems of larger apparent power consumption and larger electric energy loss in the prior art that a carrier coupling circuit is in a working state no matter whether carrier communication is carried out or not.
The technical scheme of the invention is as follows:
the power carrier communication system comprises a coupling module and a singlechip, wherein the coupling module is connected with a power line, a line switch control module is arranged in the coupling module and is connected with the singlechip,
the circuit switch control module is communicated with the internal circuit of the coupling module when the coupling module is communicated with the power circuit, and is disconnected with the internal circuit of the coupling module when the coupling module is not communicated with the power circuit.
As a further technical scheme, the line switch control module comprises a switch control circuit,
the coupling module comprises a coupling circuit, the coupling circuit comprises a coupling coil T1, a resistor R1, a capacitor C2, an inductor L2, a diode D1, a diode D2, a capacitor C4 and a carrier amplifying circuit, wherein the first end of a secondary coil of the coupling coil T1 is connected with the first end of a switch control circuit, the second end of the secondary coil of the coupling coil T1 is grounded, the second end of the switch control circuit is connected with the first end of the resistor R1, the second end of the resistor R1 is connected with the first end of the capacitor C1, the second end of the capacitor C1 is grounded, the first end of the capacitor C2 is connected with the first end of the inductor L2, the second end of the inductor L2 is grounded, the first end of the inductor L2 is connected with the cathode of the diode D1, the anode of the diode D1 is grounded, the second end of the diode D1 is connected with the cathode of the diode D2 is grounded, the first end of the capacitor C2 is connected with the carrier amplifying circuit, and the first end of the capacitor C2 is connected with the carrier amplifying circuit.
As a further technical scheme, the switch control circuit includes a resistor R6, an optocoupler U11, a triode Q1, a diode D4, a thyristor Q4, a resistor R7, a resistor R8, a thyristor Q5, a diode D5, a resistor R11, a resistor R12, a resistor R10 and a resistor R9, a first end of a secondary coil of the coupling coil T1 is connected to a cathode of the diode D4, an anode of the diode D4 is connected to an emitter of a triode in the optocoupler U11, an anode of a diode in the optocoupler U11 is connected to a first end of the resistor R6, a second end of the resistor R6 is connected to a power supply VCC, a cathode of a diode in the optocoupler U11 is connected to a control pin of the singlechip, a collector of the triode in the optocoupler U11 is connected to a base of the triode Q1, a cathode of the diode D4 is connected to an anode of the thyristor Q4, a cathode of the thyristor Q4 is connected to a cathode of the optocoupler U11, an anode of the diode D4 is connected to a second end of the thyristor Q5 is connected to a third end of the resistor R5, a third end of the triode Q5 is connected to the resistor R5, a second end of the triode is connected to the resistor R5, and a third end of the triode is connected to the resistor R5 is connected to the resistor Q5, the second end of the resistor R11 is connected with the cathode of the diode D4, the second end of the resistor R11 is connected with the first end of the resistor R12, the second end of the resistor R12 is connected with the base electrode of the triode Q1, the base electrode of the triode Q1 is connected with the first end of the resistor R10, the second end of the resistor R10 is connected with the anode of the thyristor Q5, the second end of the resistor R10 is connected with the first end of the resistor R9, and the second end of the resistor R9 is connected with the collector electrode of the triode Q1.
As a further technical scheme, the switch control circuit further comprises a capacitor C8 and a resistor R13, the first end of the secondary coil of the coupling coil T1 is connected with the first end of the capacitor C8, the second end of the capacitor C8 is connected with the first end of the resistor R13, and the second end of the resistor R13 is connected with the first end of the resistor R5.
As a further technical scheme, the carrier amplifying circuit includes an inductor L3, a capacitor C5, a MOS transistor Q3, a resistor R2, a MOS transistor Q2, a capacitor C6, a resistor R3, a zener diode D3, a capacitor C7, and a resistor R4, wherein a first end of the resistor R1 is connected to the first end of the inductor L3, a second end of the inductor L3 is connected to the first end of the capacitor C5, a second end of the capacitor C5 is connected to a drain electrode of the MOS transistor Q3, a second end of the capacitor C5 is connected to a first end of the resistor R2, a second end of the resistor R2 is connected to a drain electrode of the MOS transistor Q2, a source electrode of the MOS transistor Q2 is grounded, a gate electrode of the MOS transistor Q2 is connected to a first end of the resistor R4, a second end of the resistor R4 is connected to a single chip microcomputer, a second end of the resistor R4 is connected to the first end of the capacitor C7, a second end of the capacitor C7 is connected to a gate electrode of the MOS transistor Q3, a second end of the MOS transistor Q3 is connected to a gate electrode of the MOS transistor VCC 3, and a second end of the diode is connected to a cathode 3.
As a further technical scheme, the coupling circuit further comprises a capacitor C3, an inductor L1 and a bidirectional zener diode U1, wherein the second end of the resistor R1 is connected with the first end of the capacitor C3, the second end of the capacitor C3 is connected with the first end of the inductor L1, the second end of the inductor L1 is connected with the first end of the capacitor C1, the first end of the bidirectional zener diode U1 is connected with the first end of the resistor R1, and the second end of the bidirectional zener diode U1 is connected with the second end of the secondary coil of the coupling coil T1.
As a further technical scheme, the spread spectrum carrier communication circuit further comprises a carrier communication chip U2, a carrier communication chip U3, a control chip U4, a signal receiving adjustment circuit and a signal sending adjustment circuit, wherein a first end of the signal receiving adjustment circuit is used as a signal input end of the spread spectrum carrier communication circuit, a second end of the signal receiving adjustment circuit is connected with a first input end of the carrier communication chip U3, a first output end of the carrier communication chip U3 is connected with an input end of the control chip U4, an output end of the control chip U4 is connected with a second input end of the carrier communication chip U3, a second output end of the carrier communication chip U3 is connected with the signal sending adjustment circuit, an output end of the signal sending adjustment circuit is connected with the carrier communication chip U2, and an output end of the carrier communication chip U2 is used as a signal output end of the spread spectrum carrier communication circuit.
As a further technical scheme, the signal receiving and adjusting circuit includes a resistor R32, a capacitor C27, an inductor L7, a capacitor C26, an inductor L6, a capacitor C25, a capacitor C24, a diode D10, a resistor R31, a resistor R30, a triode Q7, a resistor R29 and a resistor R28, wherein the first end of the resistor R32 is used as a signal input end of the spread spectrum carrier communication circuit, the second end of the resistor R32 is connected with the first end of the capacitor C27, the second end of the capacitor C27 is connected with the first end of the inductor L7, the second end of the inductor L7 is grounded, the second end of the capacitor C27 is connected with the first end of the capacitor C26, the second end of the capacitor C26 is grounded, the second end of the inductor L6 is connected with the first end of the capacitor C25, the second end of the capacitor C25 is grounded, the first end of the capacitor C24 is connected with the second end of the capacitor C24 is connected with the third end of the triode Q7, the second end of the triode Q29 is connected with the base of the resistor Q7, the third end of the triode Q7 is connected with the base of the resistor Q29, and the triode Q2 is connected with the base of the resistor R30.
As a further technical scheme, the device further comprises a diode D11 and a diode D12, wherein the base electrode of the triode Q7 is connected with the cathode of the diode D11, the anode of the diode D11 is grounded, the base electrode of the triode Q7 is connected with the anode of the diode D12, and the cathode of the diode D12 is connected with the power supply VCC.
As a further technical scheme, the signal sending adjusting circuit includes a capacitor C21, a resistor R25, a capacitor C28, a resistor R23, a resistor R24, a triode Q6, a resistor R26, a capacitor C22, an inductor L5, a capacitor C23, and a resistor R27, wherein a second output end of the carrier communication chip U3 is connected to the first end of the capacitor C21, a second end of the capacitor C21 is connected to the first end of the resistor R25, a second end of the resistor R25 is connected to a base of the triode Q6, a base of the triode Q6 is connected to the first end of the resistor R23, a second end of the resistor R23 is connected to a power supply VCC, a collector of the triode Q6 is connected to the power supply VCC, a second end of the resistor R24 is connected to the first end of the capacitor C28, a second end of the resistor R25 is grounded, a second end of the capacitor C28 is connected to the ground, a base of the triode Q6 is connected to the first end of the resistor R26, a first end of the capacitor C22 is connected to the second end of the resistor C22, a second end of the resistor C23 is connected to the second end of the resistor C27 is grounded, and a first end of the resistor C22 is connected to the second end of the resistor C23.
The working principle and the beneficial effects of the invention are as follows:
in the invention, the line switch control module is controlled by the singlechip in the process of communication between the coupling module and the power grid, and when the coupling module is communicated with the power grid, the singlechip sends out a signal to control the line switch control module to control the line to be closed so as to carry out carrier communication; when the coupling module does not communicate, the coupling module line is disconnected, and when the coupling module line is disconnected, the coupling module line is equivalent to infinite load resistance for a carrier signal, and the attenuation of the carrier signal is reduced to the minimum; therefore, the problems that a large amount of apparent power consumption is consumed and carrier signals are attenuated when communication is not needed are solved, the electric energy loss is further reduced, and the stability of communication is improved.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a schematic diagram of a coupling circuit, a switch control circuit and a carrier amplifying circuit according to the present invention;
fig. 2 is a schematic diagram of a spread spectrum carrier communication circuit in accordance with the present invention.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, the embodiment provides a power carrier communication system, which comprises a coupling module and a singlechip, wherein the coupling module is connected with a power line, a line switch control module is arranged in the coupling module, the line switch control module is connected with the singlechip,
the circuit switch control module is communicated with the internal circuit of the coupling module when the coupling module is communicated with the power circuit, and is disconnected with the internal circuit of the coupling module when the coupling module is not communicated with the power circuit.
In the embodiment, in the process of communication between the coupling module and the power grid, the single chip microcomputer controls the line switch control module, and when the coupling module is in communication with the power grid, the single chip microcomputer sends a signal to control the line switch control module to control the line to be closed, so that carrier communication is performed; when the coupling module does not communicate, the coupling module line is disconnected, and when the coupling module line is disconnected, the coupling module line is equivalent to infinite load resistance for a carrier signal, and the attenuation of the carrier signal is reduced to the minimum; therefore, the problems that a large amount of apparent power consumption is consumed and carrier signals are attenuated when communication is not needed are solved, the electric energy loss is further reduced, and the stability of communication is improved.
The line switch control module comprises a switch control circuit,
the coupling module comprises a coupling circuit, the coupling circuit comprises a coupling coil T1, a resistor R1, a capacitor C2, an inductor L2, a diode D1, a diode D2, a capacitor C4 and a carrier amplifying circuit, wherein the first end of a secondary coil of the coupling coil T1 is connected with the first end of a switch control circuit, the second end of the secondary coil of the coupling coil T1 is grounded, the second end of the switch control circuit is connected with the first end of the resistor R1, the second end of the resistor R1 is connected with the first end of the capacitor C1, the second end of the capacitor C1 is grounded, the first end of the capacitor C2 is connected with the first end of the inductor L2, the second end of the inductor L2 is grounded, the first end of the inductor L2 is connected with the cathode of the diode D1, the anode of the diode D1 is grounded, the second end of the diode D1 is connected with the cathode of the diode D2 is grounded, the first end of the capacitor C2 is connected with the carrier amplifying circuit, and the first end of the capacitor C2 is connected with the carrier amplifying circuit.
In the embodiment, a carrier signal in a power grid is transmitted to a secondary side coil through a coupling coil T1, and then the signal is filtered through a capacitor C1, a capacitor C2 and an inductor L2 to obtain a carrier signal which can be received, and the carrier signal is input into a singlechip from a second end of the capacitor C4 for communication; when transmitting signals, the singlechip sends out signals, the signals are amplified by the carrier amplifying circuit, the amplified signals are transmitted to the power grid line through the coupling coil T1, when the coupling circuit does not communicate, the switch control circuit can disconnect the loop of the switch control circuit, the carrier signal is equivalent to infinite load resistance, and the attenuation of the carrier signal is reduced to the minimum.
The switch control circuit comprises a resistor R6, an optocoupler U11, a triode Q1, a diode D4, a thyristor Q4, a resistor R7, a resistor R8, a thyristor Q5, a diode D5, a resistor R11, a resistor R12, a resistor R10 and a resistor R9, wherein a first end of a secondary coil of the coupling coil T1 is connected with a cathode of the diode D4, an anode of the diode D4 is connected with an emitter of a triode in the optocoupler U11, an anode of the diode in the optocoupler U11 is connected with a first end of the resistor R6, a second end of the resistor R6 is connected with a power supply VCC, a cathode of the diode in the optocoupler U11 is connected with a control pin of the singlechip, a cathode of the diode D4 is connected with an anode of the thyristor Q4, a cathode of the thyristor Q4 is connected with an emitter of the diode, an anode of the diode D4 is connected with a third end of the thyristor Q5, a second end of the thyristor Q7 is connected with the resistor R1, a third end of the diode Q5 is connected with the triode Q5 is connected with the resistor R5, and a third end of the triode Q5 is connected with the resistor R5, the second end of the resistor R11 is connected with the first end of the resistor R12, the second end of the resistor R12 is connected with the base electrode of the triode Q1, the base electrode of the triode Q1 is connected with the first end of the resistor R10, the second end of the resistor R10 is connected with the anode of the thyristor Q5, the second end of the resistor R10 is connected with the first end of the resistor R9, and the second end of the resistor R9 is connected with the collector electrode of the triode Q1.
In this embodiment, when the coupling circuit does not perform communication, the control pin of the singlechip outputs a high level, the optocoupler U11 is in an off state, that is, the triode Q1 is in an on state, and gate currents of the thyristors Q4 and Q5 are bypassed by the triode Q1, so that the thyristors Q4 and Q5 are in an off state, that is, the coupling coil T1 is in an off state;
when the coupling circuit is to be communicated, a control pin of the singlechip outputs a low level, a diode in the optocoupler U11 is conducted, then a triode of the optocoupler U11 is conducted, a triode Q1 is cut off, the gate electrodes of the thyristors Q4 and Q5 are conducted by trigger voltage, a main loop of the coupling coil T1 is conducted, at the moment, the forward current direction is from the thyristors Q4 to the diode D5 and then to the resistor R5, the reverse current direction is from the resistor R5 to the thyristors Q5 and then to the diode D4, the coupling coil T1 can normally receive carrier signals for communication, and the purposes that when the coupling module is communicated with a power grid, the singlechip sends out signals to control a circuit switch control module to control circuit to be closed and carry out carrier communication are achieved; when the coupling module does not communicate, the coupling module line is disconnected, and when the coupling module line is disconnected, the coupling module line is equivalent to infinite load resistance for a carrier signal, and the attenuation of the carrier signal is reduced to the minimum; therefore, the problems that a large amount of apparent power consumption is consumed and carrier signals are attenuated when communication is not needed are solved, the electric energy loss is further reduced, and the stability of communication is improved.
The switch control circuit further comprises a capacitor C8 and a resistor R13, wherein the first end of the secondary coil of the coupling coil T1 is connected with the first end of the capacitor C8, the second end of the capacitor C8 is connected with the first end of the resistor R13, and the second end of the resistor R13 is connected with the first end of the resistor R5.
In this embodiment, the capacitor C8 and the resistor R13 are connected in series, so that the capacitor C8 is used for preventing voltage abrupt change, absorbing voltage in peak state, protecting the circuit, and the resistor R13 is used for damping to consume energy of overvoltage, thereby suppressing oscillation of the circuit.
The carrier amplifying circuit comprises an inductor L3, a capacitor C5, a MOS tube Q3, a resistor R2, a MOS tube Q2, a capacitor C6, a resistor R3, a voltage stabilizing diode D3, a capacitor C7 and a resistor R4, wherein the first end of the resistor R1 is connected with the first end of the inductor L3, the second end of the inductor L3 is connected with the first end of the capacitor C5, the second end of the capacitor C5 is connected with the drain electrode of the MOS tube Q3, the second end of the capacitor C5 is connected with the first end of the resistor R2, the second end of the resistor R2 is connected with the drain electrode of the MOS tube Q2, the source electrode of the MOS tube Q2 is grounded, the gate electrode of the MOS tube Q2 is connected with the first end of the resistor R4, the second end of the resistor R4 is connected with the single chip microcomputer, the first end of the resistor R4 is connected with the first end of the capacitor C7, the second end of the capacitor C7 is connected with the gate electrode of the MOS tube Q3, the second end of the MOS tube Q3 is connected with the gate electrode of the VCC 3, and the voltage stabilizing diode Q3 is connected with the gate electrode of the resistor D3.
In this embodiment, the traditional triode amplifying mode is replaced by the driving mode of the MOS transistor Q3 and the MOS transistor Q2, so that the carrier wave transmitting efficiency is greatly improved, the problem of self-oscillation in the triode amplifying circuit is solved, the generation of higher harmonics is reduced, meanwhile, the equivalent internal resistance of the driving mode of the MOS transistor is smaller than that of the triode amplifying mode, the consumption of the circuit itself to electric energy is reduced, the carrier wave transmitting efficiency and power are improved, and the reliability of carrier wave communication is improved.
The singlechip sends out signals through a resistor R4 and a capacitor C7, the signals are then transmitted to grids of a MOS tube Q3 and a MOS tube Q2 respectively, the MOS tube Q3 and the MOS tube Q2 are conducted, drain current of the MOS tube Q3 flows to the capacitor C5, and the other part flows through the resistor R2 to form voltage drop and is transmitted to a coupling coil T1 through an inductor L3, and the voltage drop is further transmitted to a power grid line for communication.
The coupling circuit further comprises a capacitor C3, an inductor L1 and a bidirectional zener diode U1, wherein the second end of the resistor R1 is connected with the first end of the capacitor C3, the second end of the capacitor C3 is connected with the first end of the inductor L1, the second end of the inductor L1 is connected with the first end of the capacitor C1, the first end of the bidirectional zener diode U1 is connected with the first end of the resistor R1, and the second end of the bidirectional zener diode U1 is connected with the second end of the secondary coil of the coupling coil T1.
In the embodiment, the bidirectional zener diode U1 protects the output voltage of the coupling coil T1, so as to avoid damage to the circuit caused by too high voltage; the capacitor C3 and the inductor L1 can select the carrier signal to form a signal with stable frequency to be accepted.
As shown in fig. 2, the spread spectrum carrier communication circuit further includes a carrier communication chip U2, a carrier communication chip U3, a control chip U4, a signal receiving adjustment circuit and a signal sending adjustment circuit, wherein a first end of the signal receiving adjustment circuit is used as a signal input end of the spread spectrum carrier communication circuit, a second end of the signal receiving adjustment circuit is connected with a first input end of the carrier communication chip U3, a first output end of the carrier communication chip U3 is connected with an input end of the control chip U4, an output end of the control chip U4 is connected with a second input end of the carrier communication chip U3, a second output end of the carrier communication chip U3 is connected with the signal sending adjustment circuit, an output end of the signal sending adjustment circuit is connected with the carrier communication chip U2, and an output end of the carrier communication chip U2 is used as a signal output end of the spread spectrum carrier communication circuit.
The signal receiving and adjusting circuit comprises a resistor R32, a capacitor C27, an inductor L7, a capacitor C26, an inductor L6, a capacitor C25, a capacitor C24, a diode D10, a resistor R31, a resistor R30, a triode Q7, a resistor R29 and a resistor R28, wherein the first end of the resistor R32 is used as a signal input end of the spread spectrum carrier communication circuit, the second end of the resistor R32 is connected with the first end of the capacitor C27, the second end of the capacitor C27 is connected with the first end of the inductor L7, the second end of the inductor L7 is grounded, the second end of the capacitor C27 is connected with the first end of the capacitor C26, the second end of the capacitor C26 is grounded, the second end of the inductor L6 is connected with the first end of the capacitor C25, the second end of the capacitor C25 is grounded, the first end of the capacitor C25 is connected with the first end of the capacitor C24, the second end of the capacitor C24 is connected with the second end of the triode Q7, the third end of the triode Q7 is connected with the first end of the triode Q29, the triode Q7 is connected with the third end of the triode Q2, the triode Q is connected with the third end of the triode Q29, and the triode Q is connected with the resistor Q30.
The LED lamp further comprises a diode D11 and a diode D12, wherein the base electrode of the triode Q7 is connected with the cathode of the diode D11, the anode of the diode D11 is grounded, the base electrode of the triode Q7 is connected with the anode of the diode D12, and the cathode of the diode D12 is connected with a power supply VCC.
The signal sending adjusting circuit comprises a capacitor C21, a resistor R25, a capacitor C28, a resistor R23, a resistor R24, a triode Q6, a resistor R26, a capacitor C22, an inductor L5, a capacitor C23 and a resistor R27, wherein the second output end of a carrier communication chip U3 is connected with the first end of the capacitor C21, the second end of the capacitor C21 is connected with the first end of the resistor R25, the second end of the resistor R25 is connected with the base electrode of the triode Q6, the base electrode of the triode Q6 is connected with the first end of the resistor R23, the second end of the resistor R23 is connected with a power supply VCC, the base electrode of the triode Q6 is connected with the first end of the resistor R24, the second end of the resistor R24 is grounded, the second end of the resistor R25 is connected with the first end of the capacitor C28, the emitter electrode of the triode Q6 is connected with the first end of the resistor R26, the second end of the capacitor C22 is connected with the first end of the capacitor C22, the second end of the resistor C22 is connected with the first end of the resistor C27, and the second end of the resistor C22 is grounded.
In this embodiment, the carrier communication chip U2, the carrier communication chip U3 and the control chip U4 are respectively SSC P111, SSC P300 and AT89LS8252, when the system is in a receiving state, the TS end of the carrier communication chip U2 is AT a high level, so that the carrier communication chip U2 is in a high-impedance state, when there is a corresponding spread spectrum signal on the power line, the carrier signal enters from pin a through a coupling transformer in the coupling module, then the spread spectrum signal passes through a band-pass filter composed of R32, capacitor C27, inductor L7, capacitor C26, inductor L6, capacitor C25 and capacitor C24, the filtered signal enters through an amplifying circuit composed of diode D10, resistor R31, resistor R30, triode Q7, resistor R29 and resistor R28, the amplified signal enters from the first input end of the carrier communication chip U3, and is subjected to amplification, despreading, a/D conversion, unpacking and other processes in the carrier communication chip U3, the obtained data information is transmitted from the output end to the control chip U4, and if the control chip U4 is judged to stop the processing if the signal is the address of the host is not needed.
If there is signal transmission, the TS end of the carrier communication chip U2 is set to low level, the carrier communication chip U2 is in an amplified state, the signal to be transmitted is transmitted to the carrier communication chip U3 by the control chip U4, the carrier communication chip U3 performs packaging D/a conversion on the data, the spread spectrum signal is obtained after processing such as spread spectrum modulation, the spread spectrum signal is output from the SO pin of the carrier communication chip U3, the signal is ac-coupled through the capacitor C21, then passes through the low-pass filter formed by the resistor R25 and the capacitor C28, enters the voltage follower formed by the resistor R23, the resistor R24, the triode Q6 and the resistor R26, amplifies the output power, reduces the output impedance, increases the capacity of carrying load, the amplified signal is ac-coupled to the input TXI of the power amplifier of the carrier communication chip U2 through the capacitor C29, the spread spectrum signal is amplified from the o pin, filtered through the inductor L4, and transmitted from the power line B through the capacitor C9, and the spread spectrum signal is transmitted to the power line coupler to realize the spread spectrum reception.
The carrier communication technology is applied to the instrument, the traditional instrument hardware adopts at least 4 core wires (power+, power-, communication RX, communication TX) to be connected with the whole vehicle system, and the novel invention is that the instrument only outputs 2 core wires (power+, power-) to be connected with the whole vehicle system, and the power wires are both power supply wires and communication wires.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (8)
1. The utility model relates to a power carrier communication system, which is characterized by comprising a coupling module and a singlechip, wherein the coupling module is connected with a power line, a line switch control module is arranged in the coupling module, the line switch control module is connected with the singlechip,
the circuit switch control module is communicated with the internal circuit of the coupling module when the coupling module is communicated with the power circuit, and is disconnected with the internal circuit of the coupling module when the coupling module is not communicated with the power circuit;
the line switch control module comprises a switch control circuit,
the coupling module comprises a coupling circuit, the coupling circuit comprises a coupling coil T1, a resistor R1, a capacitor C2, an inductor L2, a diode D1, a diode D2, a capacitor C4 and a carrier amplifying circuit, wherein a first end of a secondary coil of the coupling coil T1 is connected with a first end of a switch control circuit, a second end of a secondary coil of the coupling coil T1 is grounded, a second end of the switch control circuit is connected with a first end of the resistor R1, a second end of the resistor R1 is connected with a first end of the capacitor C1, a second end of the capacitor C1 is grounded, a first end of the capacitor C1 is connected with a first end of the capacitor C2, a second end of the capacitor C2 is grounded, a first end of the inductor L2 is connected with a cathode of the diode D1, an anode of the diode D1 is grounded, a second end of the diode D1 is connected with a cathode of the capacitor C2 is connected with a first end of the carrier amplifying circuit, and the first end of the capacitor C2 is connected with the carrier amplifying circuit;
the switch control circuit comprises a resistor R6, an optocoupler U11, a triode Q1, a diode D4, a thyristor Q4, a resistor R7, a resistor R8, a thyristor Q5, a diode D5, a resistor R11, a resistor R12, a resistor R10 and a resistor R9, wherein a first end of a secondary coil of the coupling coil T1 is connected with a cathode of the diode D4, an anode of the diode D4 is connected with an emitter of a triode in the optocoupler U11, an anode of the diode in the optocoupler U11 is connected with a first end of the resistor R6, a second end of the resistor R6 is connected with a power supply VCC, a cathode of the diode in the optocoupler U11 is connected with a control pin of the singlechip, a cathode of the diode D4 is connected with an anode of the thyristor Q4, a cathode of the thyristor Q4 is connected with an emitter of the diode, an anode of the diode D4 is connected with a third end of the thyristor Q5, a second end of the thyristor Q7 is connected with the resistor R1, a third end of the diode Q5 is connected with the triode Q5 is connected with the resistor R5, and a third end of the triode Q5 is connected with the resistor R5, the second end of the resistor R11 is connected with the first end of the resistor R12, the second end of the resistor R12 is connected with the base electrode of the triode Q1, the base electrode of the triode Q1 is connected with the first end of the resistor R10, the second end of the resistor R10 is connected with the anode of the thyristor Q5, the second end of the resistor R10 is connected with the first end of the resistor R9, and the second end of the resistor R9 is connected with the collector electrode of the triode Q1.
2. The power carrier communication system of claim 1, wherein the switch control circuit further comprises a capacitor C8 and a resistor R13, the first end of the secondary coil of the coupling coil T1 is connected to the first end of the capacitor C8, the second end of the capacitor C8 is connected to the first end of the resistor R13, and the second end of the resistor R13 is connected to the first end of the resistor R5.
3. The power carrier communication system according to claim 2, wherein the carrier amplifying circuit comprises an inductor L3, a capacitor C5, a MOS transistor Q3, a resistor R2, a MOS transistor Q2, a capacitor C6, a resistor R3, a zener diode D3, a capacitor C7 and a resistor R4, wherein a first end of the resistor R1 is connected to the first end of the inductor L3, a second end of the inductor L3 is connected to the first end of the capacitor C5, a second end of the capacitor C5 is connected to a drain electrode of the MOS transistor Q3, a second end of the capacitor C5 is connected to the first end of the resistor R2, a second end of the resistor R2 is connected to a drain electrode of the MOS transistor Q2, a source electrode of the MOS transistor Q2 is grounded, a gate electrode of the MOS transistor Q2 is connected to the first end of the resistor R4, a second end of the resistor R4 is connected to the first end of the capacitor C7, a second end of the capacitor C7 is connected to the first end of the capacitor C5, a second end of the capacitor C5 is connected to the gate electrode of the MOS transistor Q3 is connected to the cathode of the resistor Q3, and a source electrode of the MOS transistor Q3 is connected to the cathode of the resistor Q3.
4. The power carrier communication system of claim 3, wherein the coupling circuit further comprises a capacitor C3, an inductor L1, and a zener diode U1, the second end of the resistor R1 is connected to the first end of the capacitor C3, the second end of the capacitor C3 is connected to the first end of the inductor L1, the second end of the inductor L1 is connected to the first end of the capacitor C1, the first end of the zener diode U1 is connected to the first end of the resistor R1, and the second end of the zener diode U1 is connected to the second end of the secondary winding of the coupling winding T1.
5. The power carrier communication system according to claim 4, further comprising a spread spectrum carrier communication circuit, wherein the spread spectrum carrier communication circuit comprises a carrier communication chip U2, a carrier communication chip U3, a control chip U4, a signal receiving adjustment circuit and a signal transmitting adjustment circuit, a first end of the signal receiving adjustment circuit is used as a signal input end of the spread spectrum carrier communication circuit, a second end of the signal receiving adjustment circuit is connected to a first input end of the carrier communication chip U3, a first output end of the carrier communication chip U3 is connected to an input end of the control chip U4, an output end of the control chip U4 is connected to a second input end of the carrier communication chip U3, a second output end of the carrier communication chip U3 is connected to the signal transmitting adjustment circuit, an output end of the signal transmitting adjustment circuit is connected to the carrier communication chip U2, and an output end of the carrier communication chip U2 is used as a signal output end of the spread spectrum carrier communication circuit.
6. The power carrier communication system according to claim 5, wherein the signal receiving and adjusting circuit comprises a resistor R32, a capacitor C27, an inductor L7, a capacitor C26, an inductor L6, a capacitor C25, a capacitor C24, a diode D10, a resistor R31, a resistor R30, a transistor Q7, a resistor R29, and a resistor R28, wherein a first end of the resistor R32 is used as a signal input end of the spread spectrum carrier communication circuit, a second end of the resistor R32 is connected to a first end of the capacitor C27, a second end of the capacitor C27 is connected to a first end of the inductor L7, a second end of the capacitor C27 is connected to a ground, a second end of the capacitor C27 is connected to a first end of the capacitor C26, a second end of the capacitor C26 is connected to a first end of the inductor L6, a second end of the capacitor C25 is connected to a second end of the capacitor C7, a second end of the transistor C24 is connected to a second end of the transistor Q29 is connected to a first end of the resistor Q7, a second end of the transistor Q7 is connected to a second end of the transistor Q29 is connected to a second end of the resistor Q7, a base of the transistor is connected to a second end of the resistor Q7 is connected to a second end of the resistor Q30, and a third end of the resistor is connected to a second end of the resistor.
7. The power carrier communication system of claim 6, further comprising a diode D11 and a diode D12, wherein the base of the transistor Q7 is connected to the cathode of the diode D11, the anode of the diode D11 is grounded, the base of the transistor Q7 is connected to the anode of the diode D12, and the cathode of the diode D12 is connected to the power source VCC.
8. The power carrier communication system according to claim 7, wherein the signal transmission adjustment circuit comprises a capacitor C21, a resistor R25, a capacitor C28, a resistor R23, a resistor R24, a transistor Q6, a resistor R26, a capacitor C22, an inductor L5, a capacitor C23, and a resistor R27, wherein a second output terminal of the carrier communication chip U3 is connected to the first terminal of the capacitor C21, a second terminal of the capacitor C21 is connected to the first terminal of the resistor R25, a second terminal of the resistor R25 is connected to a base of the transistor Q6, a base of the transistor Q6 is connected to the first terminal of the resistor R23, a second terminal of the resistor R23 is connected to a power source VCC, a collector of the transistor Q6 is connected to a power source VCC, a base of the transistor Q6 is connected to the first terminal of the resistor R24, a second terminal of the resistor R25 is connected to the first terminal of the capacitor C28, a second terminal of the capacitor C28 is connected to the second terminal of the capacitor C28, a second terminal of the resistor Q6 is connected to the first terminal of the resistor C26, a first terminal of the capacitor C22 is connected to the second terminal of the resistor C26, a first terminal of the resistor C23 is connected to the second terminal of the resistor C23, a second terminal of the resistor C2 is connected to the second terminal of the resistor C23, and a second terminal of the resistor C23 is connected to the first terminal of the resistor C2 is connected to the capacitor C27.
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