Unlock instant, AI-driven research and patent intelligence for your innovation.

Power line carrier wave communication method based on ARM7 and ST7538

A technology of ST7538 and power line carrier, applied in distribution line transmission system, etc., can solve problems such as easy to be damaged by human beings, huge wired communication line laying project, and inconvenience to residents

Inactive Publication Date: 2011-05-04
陕西银河电力仪表股份有限公司
View PDF0 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a traditional method, wired communication technology has an advantage in its stability, but the wired communication wiring project is huge and easily damaged by man-made; especially in the case of residential buildings that have been built, pulling the wires on the wall surface will cause great inconvenience to the residents

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Power line carrier wave communication method based on ARM7 and ST7538
  • Power line carrier wave communication method based on ARM7 and ST7538
  • Power line carrier wave communication method based on ARM7 and ST7538

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] Below in conjunction with accompanying drawing, describe an embodiment of the present invention.

[0020] This embodiment contains hardware: a microcontroller, a modem chip, and a power line interface. The microcontroller chooses Philips (Philips) LP2132 microcontroller with ARM core; the modem chip chooses ST7538 from SGSTHOMSON.

[0021] The circuit of the power line interface is as figure 2 As shown: it is firstly a coupling circuit for the transmission and reception of FSK signals; it is also a filter system that can reliably filter out 220V / 50Hz power signals, noise signals and surge signals. The sending circuit is composed of C4, C5, R3, L3, D1, D2, D3, T1, C1, L1, R1, where C4, C5, R3, L3 and C1, L1, R1 form two band-pass filters respectively, and D1, D2, D3 constitute a protection circuit. The ideal resonant frequency of the two bandpass filters can be calculated by the following formula:

[0022]

[0023]

[0024] The receiving circuit is composed of...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to power line carrier wave communication technology, comprising a microcontroller, a modulation-demodulation chip, a power line interface and a software control program. The invention provides a new power communication method with small investment and rapid effectiveness by utilizing an AC power line as a communication line and applying the electric power carrier wave communication technology.

Description

technical field [0001] The invention relates to a power line carrier communication technology. technical background [0002] The automatic meter reading system mainly includes wired communication technology and power carrier communication technology at present. As a traditional method, wired communication technology has an advantage in its stability, but the wired communication line laying project is huge, and it is easy to be damaged by man-made; especially in the case of residential buildings that have been built, pulling the wires on the wall surface will cause great inconvenience to the residents . [0003] The communication principle of the traditional low-voltage power line carrier system is as follows: figure 1 Shown: [0004] The data is sent by the main communication equipment, stored in a section of the buffer in the microcontroller processing through the communication interface module, and then encoded and processed for communication modulation, and finally cou...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04B3/54
Inventor 郗晓勇孟小军汪鑫
Owner 陕西银河电力仪表股份有限公司