HEAT RAY SENSOR ON-BOARD BURGLAR ALARM

摘要

PROBLEM TO BE SOLVED: To provide a heat ray sensor on-board burglar alarm which can surely detect when a vehicle door is opened. SOLUTION: The heat ray sensor on-board burglar alarm which detects when the door is opened by using the heat ray sensor 5 sensing the temperature of an object and gives an alarm, is provided with a heating body 2 which is attached to the inside of the door and is heated up to a temperature that is higher than a human body temperature sensed by the heat ray sensor 5 and is capable of being discriminated from the human body, the heat ray sensor 5 which is attached to the ceiling of the cabin or its periphery and the sensing direction of which is set so as to detect the temperature of the heating body 2, and a control means 17 which judges the door is opened when there is a drastic reduction in temperature sensed by the heat ray sensor 5 and operates an alarm means 8, 23.