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Signal transmission method and system on basis of two-wire bus capable of supplying power

A signal transmission system and signal transmission technology, which are applied in the field of signal transmission methods and systems based on a power supply two-wire bus

Active Publication Date: 2012-10-10
HUNAN YIMAIDE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a signal transmission method and system based on a power supply two-wire bus, so as to realize the lossless transmission of analog signals or / and digital signals on a pair of power supply wires, and at the same time solve the equivalence of signals between communication nodes transmission problem

Method used

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  • Signal transmission method and system on basis of two-wire bus capable of supplying power
  • Signal transmission method and system on basis of two-wire bus capable of supplying power
  • Signal transmission method and system on basis of two-wire bus capable of supplying power

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Embodiment 1

[0066] Specific embodiment 1 sees when the present invention transmits digital signal Figure 8 with Figure 9 :

[0067] Figure 8 It is one of the circuit diagrams of the voltage source 1 when transmitting analog signals, wherein the current sampling circuit 13 is R1, the AC coupling circuit 14 is C1; the control circuit 15 is a voltage comparator composed of resistors R8, R9, R10 and a voltage comparator U3 Circuit; the controlled voltage source 16 is composed of resistors R6, R7 and a three-terminal adjustable voltage regulator U2. According to the circuit principle, it can be deduced that: when the first supply current decreases or the variation range is smaller than the predetermined value of the first supply current variation range, the supply voltage is the predetermined highest value of the supply voltage; when the first supply current increases and the increase is greater than the first When the predetermined value of the power supply current variation range, the ...

specific Embodiment 2

[0070] Specific embodiment 2 when the present invention transmits digital signal sees Figure 10 with Figure 11 :

[0071] Figure 10 It is the second schematic diagram of the voltage source 1 when transmitting digital signals, wherein the current sampling circuit 13 is R1, the AC coupling circuit 14 is C1; the control circuit 15 is a voltage comparator composed of resistors R8, R9, R10 and a voltage comparator U3 Circuit; the controlled voltage source 16 is a driven H-bridge circuit composed of resistors R26, R27, R28, R29, NPN transistors T3, T5, PNP transistors T4, T6 and inverter U8. According to the circuit principle, it can be deduced that: when the first supply current decreases or the range of change is smaller than the predetermined value of the range of change of the first supply current, the polarity of the supply voltage is the predetermined polarity of the supply voltage; when the first supply current increases and the amplitude When it is greater than the pre...

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Abstract

The invention discloses a signal transmission method and system on the basis of a two-wire bus capable of supplying power. The signal transmission method is characterized in that analog signals and / or digital signals are transmitted to the system consisting of the two-wire bus, a plurality of nodes connected with the bus, and a voltage source for supplying a first power supply current to the bus, and a power supply voltage supplied to the two-wire bus by the voltage source changes along with the change of the first power supply current; and the nodes transmit current loop signals to the two-wire bus, receive voltage signals from the two-wire bus and absorb constant currents from the two-wire bus. The signal transmission method and system realize the transmission of the analog signals, the digital signals and the signals of a power supply with large power in a two-wire bus system capable of supplying power, so that the two-wire bus system capable of supplying power in the future simultaneously has capacities of digital communication, voice communication and large electrical load drive, thus having great significance on a self-distribution communication and control system needing to provide call and communication functions simultaneously.

Description

technical field [0001] The invention belongs to a signal transmission method and system, in particular to a signal transmission method and system based on a power supply two-wire bus. Background technique [0002] In the field of communication and control, the two-wire bus system technology that simultaneously transmits power and signals has always been the focus of common attention of engineers and technicians in the field. [0003] Carrier signal superposition on the power line is a traditional method, but due to the difficulty of adopting effective isolation measures, the carrier signal will be greatly attenuated by the power supply circuit and the power consumption circuit, resulting in short signal transmission distance, low communication speed, and small node capacity , the emergence of high performance requirements for power supply equipment and electrical equipment. In view of this, a patent (application number: 201010125972.5) entitled "Single-bus Communication Sys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B3/54
Inventor 肖伏初
Owner HUNAN YIMAIDE TECH