SEARCH DEVICE AND PROGRAM

To provide technology that efficiently searches for a device to be searched, while reducing a risk of a battery of the device to be searched running out of power.SOLUTION: A reception unit 180 receives a signal transmitted at prescribed transmission intervals from a device 200 to be searched. A processing unit 150 executes at least one of a first determination process of deriving a distance to the device 200 to be searched, on the basis of first received information and determining reduction of signal transmission output from the device 200 to be searched, when reception strength of the received signal is greater than or equal to a first threshold or the derived distance is less than a second threshold, and a second determination process of determining extension of signal transmission intervals from the device 200 to be searched, when the reception strength of the received signal is less than a third threshold or the derived distance is greater than or equal to a fourth threshold.SELECTED DRAWING: Figure 1 【課題】被探索装置のバッテリーが切れるリスクを低減しながら、被探索装置を効率的に探索する技術を提供する。【解決手段】受信部１８０は、被探索装置２００から所定の送信間隔で送信された信号を受信する。処理部１５０は、第１受信情報をもとに被探索装置２００との距離を導出し、受信した信号の受信強度が第１しきい値以上である場合、または導出した距離が第２しきい値未満である場合に、被探索装置２００における信号の送信出力の低下を決定する第１決定処理、および、受信した信号の受信強度が第３しきい値未満である場合、または導出した距離が第４しきい値以上である場合に、被探索装置２００における信号の送信間隔の延長を決定する第２決定処理のうちの少なくとも一方の処理を実行する。【選択図】図１