Abstract
We develop and study a manual stop switch of the mobile robot. We evaluate manual stop system by questionnaire. The operator or administrator is not near to the mobile robot at all times, so it is necessary to find uncontrollable robot and stop it by third person. In addition, the range of movement of the robot is wide and there are some situations which are dangerous. We are trying to solve this problem using a prototype switch using a mesh network. We develop safety switch and send out questionnaire in my laboratory to evaluate practicability of it. As a result, we show efficiency and safety through use of whole system.