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Design and Analysis of Intrinsic Safety Power of Wireless Sensor Network Node
CHEN Guangzhu * #,Zhu Zhencai,LU qian,SHEN Chunfeng,Zhou Lijuan
School of Mechanical and Electrical Engineering, China University of Mining and Technology
*Correspondence author
#Submitted by
Subject:
Funding: 中国博士后科学基金,教育部博士点新教师基金,江苏省博士后科研资助计划(No.20070411065,200802901507,0801028B)
Opened online:22 January 2009
Accepted by: none
Citation: CHEN Guangzhu,Zhu Zhencai,LU qian.Design and Analysis of Intrinsic Safety Power of Wireless Sensor Network Node[OL]. [22 January 2009] http://en.paper.edu.cn/en_releasepaper/content/28250
 
 
Wireless sensor networks may be used in the explosion environment, such as underground tunnel in coal mine. In order to assure that nodes work normally, the power of the node must be intrinsic safety. An intrinsic safety power of nodes of which consists of power supply and intrinsic safety protection is developed. The power supply mainly consists of current-mode controller chip LTC1871 which controls the output voltage, can attains a stable output voltage. The intrinsic safety protection consists of a dual-stage electric current monitor chip and a voltage regulator tube, which is combined with an over-voltage protection that was integrated in LTC1871 to make up intrinsic safety protection circuit of double over-voltage and over-current protection. The theory analysis and simulation tests on discharge process of intrinsic safety power are described. The results display that the discharge energy is the nonlinear proportion of the current, increases with the current increasing, and the maximum discharge energy is less than 0.02mJ; the discharge power is the linear proportion of current, increases with the current increasing, and the maximum discharge power is less than 60W, which is within the permissible intrinsic safety standard, therefore the power is the intrinsic safety.
Keywords:Wireless sensor networks;Node;Power;Intrinsic Safety;Double Protection
 
 
 

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