WIRELESS SENSOR, WIRELESS CONTROLLER, AND WIRELESS GUARD SYSTEM USING THEM

摘要

PROBLEM TO BE SOLVED: To reduce the power consumption of a battery for a wireless sensor. SOLUTION: A transmission timing of a prescribed period is set to a wireless controller. When some signal is transmitted to the wireless sensor, a synchronizing signal and a data string of a signal to be essentially transmitted are transmitted repeatedly by a prescribed number of times in the period of an actual data part. The wireless sensor is provided with a transmission part 9 and a reception part 23. An actual processing part 21 closes a switch 25 only in the period of the actual data part of the transmission timing set to the controller to supply the power from a battery 10 to the reception part 23.