| 摘要 |
PROBLEM TO BE SOLVED: To specify easily a calling position of a wireless call button. SOLUTION: A nurse call apparatus includes the wireless call button having a call switch T11 for starting the call, a transmitting ID code storage circuit T19 for storing previously an ID code, and a call high-frequency transmitting circuit T15 for adding the ID code to a call radio wave for calling when the call switch is pressed and transmitting the call radio wave. A receiver has a receiving ID code storage circuit J15 for storing previously the ID code; a called high frequency receiving circuit J12 for receiving the call radio wave; an electric field intensity detector circuit J13 for reading an electric field intensity of the call radio wave from a wireless call button received by the called high frequency receiving circuit; and a control circuit J14 for setting to switch from one to the other of the maximum receiving sensitivity and low receiving sensitivity in the called high frequency receiving circuit, and transmitting the electric field intensity data from the electric field intensity detector circuit via a passage light to specify the calling position of the wireless call button. COPYRIGHT: (C)2005,JPO&NCIPI
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