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Micropower wireless communicating method and apparatus for local monitor and control

A micro-power wireless and local area technology, applied in radio relay systems, signal transmission systems, instruments, etc., can solve the problems of simultaneous transmission of multiple data channels, no clear transmission direction, difficult processing of receivers, etc., to improve flexibility performance, improve efficiency, and reduce system cost

Inactive Publication Date: 2007-12-05
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the amount of data transmitted by each signal is not large in local monitoring and control, it can be considered to increase the transmission distance by providing signal relay. However, wireless transmission is different from wired transmission, and there is no clear transmission direction. As the transmission distance increases, there will be a problem of simultaneous transmission of multiple data channels, which will cause difficulties in the processing of the receiver

Method used

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  • Micropower wireless communicating method and apparatus for local monitor and control
  • Micropower wireless communicating method and apparatus for local monitor and control
  • Micropower wireless communicating method and apparatus for local monitor and control

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Embodiment one: referring to accompanying drawing 1 to shown in accompanying drawing 8, a kind of micropower wireless communication device that is used for local area monitoring, control, comprises single-chip microcomputer (Atmega8 series CPU), wireless receiving and sending control unit (with nRF401 as wireless transceiver The PTRs2000 series micro-power data transmission module of the device) and the antenna, the input and output interfaces of the single-chip microcomputer are connected with a general asynchronous communication interface expansion circuit, two sets of 8-bit control switches (DIP switches), and display circuits (8-segment digital tubes and light-emitting diodes) , the XP3 socket of the universal asynchronous communication interface expansion circuit is connected to the wireless receiving and sending control part, and the XP4 socket is connected to an RS-232 interface or an RS-485 interface, and the display circuit is used to display the local ID and oth...

Embodiment 2

[0044] Embodiment 2: A micro-power wireless communication device for local area monitoring and control. Its structural features are the same as in Embodiment 1, but the transmitted data structure is different, and it is suitable for the monitoring function of leaf node connection with more than one type of data. monitoring device. The difference in its data structure is that the format of the query command issued by the central point includes the characteristic word, the signal sequence identification mark related to time, the ID number of the leaf node receiving the command, and the number of the data to be obtained. Thus, the monitoring device (such as a secondary instrument) connected to the leaf node can send back the corresponding required data).

Embodiment 3

[0045] Embodiment three: a micropower wireless communication device for local area monitoring and control. Compared with embodiment one, the single-chip microcomputer is only connected to a group of 8-bit DIP switches (DIP1 # ), use 2 of the 8-bit control switch to set the device identity control, 1 bit defines the RS-232 or RS-485 interface, and the remaining 5 bits are used to set the identification code; do not install U4: LS245 and DIP2 # . It is suitable for monitoring and controlling the local area where the effective range of micro-power wireless communication is within 600 meters to 700 meters, and the monitoring points are within 32 occasions. The data of wireless communication is directly transmitted between the center point and the leaf node. , or passed through a level 1 relay child node.

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Abstract

A micro-power radio communication method of local detection and control includes forming star shaped topological dynamic tree structure by setting relay with each node using micro-power to emit and receive signal, using time delay and identification mark to shield the other channel to form the only dynamic transmission channel between root node and special leaf node at certain time for realizing detection and control of signal transmission. The device for realizing the method is also disclosed.

Description

technical field [0001] The present invention relates to a method and device for micro-power wireless communication, in particular to a method for transmitting signals of monitoring signals and control signals in a local area through micro-power wireless communication in an open frequency band and an implementation device thereof. Background technique [0002] In production process control, and some occasions that require remote monitoring, it is necessary to transmit the signal obtained by the sensor or instrument to the computer, or to transmit the control signal given by the computer to the control device. This kind of signal transmission is generally in the workshop, factory area, building, Local areas such as residential quarters, the transmission distance is usually between hundreds of meters to thousands of meters. The number of sampling points or controlled points is usually between dozens and nearly a hundred, and they are connected to the host computer through the t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08C17/02H04B7/15
Inventor 王宏张群
Owner SUZHOU UNIV