Real time energy detection system of wireless sensor network node

A wireless sensor and network node technology, applied in the direction of instruments, measuring electronics, measuring devices, etc., can solve the problems of difficult errors, affecting the measurement accuracy of open circuit voltage, and the difference between open circuit voltage and capacity, and achieve the effect of low power consumption
CN101408591AInactive Publication Date: 2009-04-15NANKAI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANKAI UNIV
Publication Date
2009-04-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a real-time energy detecting system for a wireless sensor network node. The real-time energy detecting system provided by the invention consists of a stand alone type coulometer chip DS2786 which is based on open-circuit voltage (OCV) and belongs to Maxim company, a control core which is an ultra low power microcontroller C8051F920 belonging to Silicon Laboratories company, and peripheral circuits thereof. The invention provides a hardware solving proposal for energy management of a low power-consumption wireless sensor network node; the solving proposal includes: according to the OCV of the battery being unused for a period of time, available electric quantity of a chargeable lithium ion battery and a lithium ion polymer battery is estimated; relative electric quantity is estimated by a coulometer when discharging at high speed; compensation is carried out according to the detected temperature data to obtain more accurate dump energy value of the battery.
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Description

【Technical field】:

[0001] The invention relates to a real-time energy detection system of a wireless sensor network node, in particular to a low power consumption, high-precision lithium battery power detection method. 【Background technique】:

[0002] The wireless sensor nodes are small in size and generally carry batteries with very limited energy. When the battery power is exhausted, the nodes will fail immediately. Therefore, the detection of node energy is of great significance for estimating node lifetime and communication capability. Node energy is also the first factor to be considered when performing cluster head rotation in a hierarchical network. The earliest applied method is to obtain the remaining capacity by monitoring the open circuit voltage of the battery. This is because there is a definite relationship between the battery terminal voltage and the remaining capacity, and the remaining capacity can be estimated by measuring the battery terminal voltage. Th...

Claims

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