| 摘要 |
<P>PROBLEM TO BE SOLVED: To restrain the consumption of a battery built in a transmitter while continuing notification of calling as long as a mat sensor is stepped on. <P>SOLUTION: A one-shot call signal is transmitted from the transmitter to a receiver when the mat sensor is stepped on, and if the mat sensor is stepped on even after the lapse of a predetermined time, a continuous call signal that instructs continuous calling is transmitted from the transmitter to the receiver. At a point of time when the mat sensor is no longer stepped on after transmitting the continuous call signal, a call release signal that instructs call restoration is transmitted from the transmitter to the receiver. Calling of a nurse call master unit is thereby performed continuously as long as the mat sensor is stepped on, and even when the mat sensor is continuously stepped on, the transmission frequency of signals from the transmitter to the receiver is set to only three times. <P>COPYRIGHT: (C)2012,JPO&INPIT |
