Aiming at the localization problem of the wired sensor nodes

an approach is proposed to measure the distance between the wired sensor nodes.A host node with ranging function and several sensor nodes are distributed in a communication bus by sequence.The host node has pulse reflection and receiving circuits.Following the preset command

the sensor nodes short its electronic switch on the communication bus.Using the time-domain pulse reflection theory

ranging experiments are implied to detect the distance between the host node and sensor nodes in the bus.The experiment results show that this method can detect the sequence of the host node and sensor nodes in the bus and the distance between them.