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Clearance-type waking up method of wireless meter reading system

A wireless meter reading and intermittent technology, applied in signal transmission systems, instruments, etc., can solve the problems of co-channel interference, high power consumption, shortened battery power supply time, etc., and achieve the effect of solving communication dead ends and low power consumption

Active Publication Date: 2009-12-23
上海桑锐电子科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are several disadvantages in such a system: 1. The terminal consumes a lot of power
Because the data is constantly sent out regularly, the system must always be in the working state and cannot enter the sleep energy-saving state, or wake up repeatedly after entering the sleep state, so the power consumption is large and the battery power supply time is shortened.
2. The communication time of meter reading is long, because the normal wake-up time of the terminal is long, up to 10mS
3. The same frequency interference affects the normal operation of the system

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] When the wireless routing acquisition terminal adopting the "automatic power up" mode is in a dormant state, the microprocessor in the wireless routing acquisition terminal sends a very short pulse every second, such as a pulse width of 1μS, to the wireless communication chip, so that the wireless communication chip The individual registers related to information collection are set and started to monitor whether there is a pre-set same-frequency signal, and the monitoring time is about 2mS. If there is no co-frequency signal within the 2mS monitoring time, the wireless communication chip will continue to be in a dormant state; if there is a co-frequency signal, the wireless communication chip will immediately send back a response pulse to the microprocessor, and the microprocessor will issue a command accordingly. Quickly wake up the wireless communication chip, make it into a full working state, that is, the normal receiving mode, receive the same frequency data, and th...

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PUM

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Abstract

The invention is a clearance-type waking up method of a wireless meter reading system, comprising the following steps: transmitting a pulse every second to a wireless communication chip by a microprocessor in a wireless collection terminal; placing the pulse into an information collection register in the wireless communication chip; judging whether the same frequency signal having the same overlapping with the work frequency of 470MHz exists or not in monitoring time, if not, the wireless communication chip being at dormant state, if so, sending back a response pulse to the microprocessor by the wireless communication chip; sending a directive for waking up the wireless communication chip quickly and leading the wireless communication chip at work state. The invention solves the problems of large energy consumption of repeatedly waking up of the wireless collection terminal, same frequency inference and small distance of meter reading in existing wireless meter reading system.

Description

technical field [0001] The invention relates to an intermittent wake-up method of a wireless meter reading system, which can greatly shorten the meter reading time and realize high-efficiency meter reading. Background technique [0002] The domestic wireless meter reading system is generally composed of a battery-powered wireless routing acquisition terminal, a hand copy device, a concentrator, and a control center. The wireless routing acquisition terminal is mainly composed of a microprocessor, a wireless communication chip, and a wireless communication signal processing circuit. There are two ways of wireless data transmission, one-way communication and two-way communication, that is, a micro-power wireless data transmission module is installed at the end of the meter, and the end of the meter constantly sends measurement data regularly or sends parameters to the concentrator and management center after receiving instructions. Such a system has several disadvantages: 1. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08C17/02
Inventor 聂光义毛加兴魏建军
Owner 上海桑锐电子科技股份有限公司
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