A synchronization method for low-power wireless meter reading system

Abstract

The invention discloses a synchronization method for a low-power-consumption wireless meter reading system. According to the synchronization method, a clock of a tail electricity meter node of an electricity meter backbone network is taken as a synchronization time source, and the time synchronization between each low-power-consumption node and the electricity meter node is realized by triple effective data interaction processes between the low-power-consumption node and the electricity meter node and the time regulation on the node. The triple effective data interaction processes include network accessing synchronization of nodes, periodic synchronous maintenance and periodic synchronous detection. The synchronization realized by the method is the synchronization among subnets, namely, the time synchronization maintained among the low-power-consumption subnets which take the tail electricity meter node of the electricity meter network as a root node. The synchronization scheme is built on a low-power-consumption hardware platform MSP430+CC1100E, and the low-power-consumption control from a software protocol stack to hardware is finished by interaction of various data frames containing time information, and hardware underlying drive related to a low-power-consumption mechanism.

Description

technical field [0001] The invention belongs to the technical field of wireless sensor networks, and in particular relates to a synchronization method for a low-power consumption wireless meter reading system. Background technique [0002] Most of the automatic meter reading devices that have appeared at present are semi-automatic. In a certain community or a certain area, the electric meter or water meter, gas meter, and heat meter of each household are transformed into a way that can output pulses. Take the electric meter as an example. , Each meter is marked with a pulse constant, which represents how many times the dial turns to be one degree of electricity. Assuming that 720 is the pulse constant, it means that after the meter rotates 720 times on the dial, the electric degree will increase by one degree. The function of the photoelectric probe is to convert the mechanical revolutions of the dial into electrical pulses, that is, every revolution of the dial of the elec...

AI Technical Summary

Problems solved by technology

For low-power meters, its biggest bottleneck is energy consumption. Due to the use of battery power, excessive energy consumption will shorten the life of nodes and reduce practicability.

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