NOTIFICATION SIGNAL TRANSMISSION DEVICE

PROBLEM TO BE SOLVED: To provide a notification signal transmission device which is operated while saving power, the notification signal transmission device being configured to transmit a notification signal reporting the existent of protected equipment for which it is undesired to be influenced by an electromagnetic field.SOLUTION: A notification signal transmission device 100 comprises: an electromagnetic field sensor 101; an interval control part 103 for identifying a transmission interval and/or transmission power of a notification signal corresponding to a measured strength of an electromagnetic field obtained by the electromagnetic field sensor 101 in accordance with control information previously determining a correspondence between the measured strength of the electromagnetic field and the transmission interval and/or the transmission power of the notification signal; and a transmission control part 105 for transmitting the notification signal with the transmission interval and/or the transmission power identified by the interval control part 103. The control information is determined in such a manner that the notification signal is not transmitted in the case where the measured strength of the electromagnetic field is lower than a predetermined reference value and that the transmission interval of the notification signal becomes longer and/or the transmission power becomes smaller as the measured strength of the electromagnetic field is lower in the other cases.SELECTED DRAWING: Figure 2 【課題】電磁界の影響を受けることが好ましくない被保護機器の存在を知らせる報知信号を送信する報知信号送信装置であって、省電力で動作する報知信号送信装置を提供する。【解決手段】報知信号送信装置１００は、電磁界センサ１０１と、電磁界の測定強度と報知信号の送信間隔および／または送信電力との対応関係を予め定めた制御情報に従って、電磁界センサ１０１によって得られた電磁界の測定強度に対応する報知信号の送信間隔および／または送信電力を特定する間隔制御部１０３と、間隔制御部１０３によって特定された送信間隔および／または送信電力で報知信号を送信する送信制御部１０５とを含む。制御情報は、予め定められた基準値よりも電磁界の測定強度が低い場合には報知信号の送信を行わず、且つ、当該場合以外の場合には電磁界の測定強度が低いほど報知信号の送信間隔がより長くおよび／または送信電力が小さくなるように、定められている。【選択図】図２