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Communication interface circuit based on power line

A communication interface circuit, power line technology, applied in the direction of data switch current source, distribution line transmission system, electrical components, etc.

Inactive Publication Date: 2020-02-04
SUZHOU R&D CENT OF NO 214 RES INST OF CHINA NORTH IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In some product circuits, there is usually only a power supply line, but the power supply line is required to be able to provide power to the product and realize two-way data communication to the product. The existing serial communication protocol transmission based on RS485 / 422 / 232 The data scheme cannot be realized, and a dedicated interface circuit needs to be developed

Method used

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  • Communication interface circuit based on power line
  • Communication interface circuit based on power line
  • Communication interface circuit based on power line

Examples

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0031] Depend on figure 1 As shown, a power line-based communication interface circuit of the present invention includes: a power supply isolation unit 1 , a data sending unit 2 and a data receiving unit 3 . The communication bus implements power supply, data sending and receiving functions. Among them, the power supply isolation unit 1 separates the electric energy on the communication bus to provide working energy for the normal operation of the circuit main control unit, including the power isolation circuit 4; the sending data unit 2 is used to realize the conversion of communication data into high-frequency signals, And then loaded onto the power line, including carrier synthesis circuit ...

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Abstract

The invention discloses a communication interface circuit based on a power line, and the circuit comprises: a power supply isolation unit which separates electric energy on a communication bus, and provides working electric energy for the normal operation of a circuit main control unit; a data sending unit which is used for converting communication data into high-frequency signals and loading thehigh-frequency signals to the power line, and comprises a carrier synthesis circuit and a signal and power supply coupling circuit; and a data receiving unit which is used for demodulating data on thecommunication bus and converting the demodulated data into a level signal which can be identified by the controller, and comprises a filter circuit, a differential amplification circuit, a comparatorand a logic signal conditioning circuit. According to the communication interface circuit based on the power line, based on an existing power supply line, bidirectional data transmission between theoutside and a product main control system can be achieved under the condition that extra connection lines are not added, and the communication function is achieved.

Description

technical field [0001] The invention relates to a communication interface circuit based on a power supply line, belongs to the technical field of data communication, and can be applied to various instruments and meters based on power supply line data communication. Background technique [0002] Communication technology includes wireless communication and wired communication. Wired communication is widely used due to its advantages of no external environment interference, simple circuit structure, and high communication reliability. Wired communication usually uses serial communication protocols such as RS485 / 422 / 232 to transmit data. Standard integrated circuits are used as signal drivers. The voltage on the communication signal transmission line is kept within the standard range, with high data transmission rate and long sensing distance. [0003] In some product circuits, there is usually only a power supply line, but the power supply line is required to be able to provid...

Claims

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Application Information

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IPC IPC(8): H04B3/56H04B3/54H04L12/10
CPCH04B3/542H04B3/56H04L12/10
Inventor 张建新梁宛玉贾丹丹杨翠侠李坤
Owner SUZHOU R&D CENT OF NO 214 RES INST OF CHINA NORTH IND GRP
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