To more surely detect an unsafe action of a maintenance worker and reduce an erroneous report and a report failure.SOLUTION: A safety confirmation system includes: a first transmitter 501 provided in an external opening key 401 for opening a landing door; a second transmitter 502 provided on a hook 402 of a fall prevention device; a reception unit worn by a maintenance worker, configured to receive radio waves transmitted by the first transmitter 501 and the second transmitter 502; and a control unit configured to measure a reception signal intensity of the received radio waves. The control unit rings an alarm for urging hooking of the fall prevention device, while the reception signal intensity of the radio waves from the second transmitter 502 is not reduced to a predetermined ratio with respect to an initial value after it is detected that the reception signal intensity from the first transmitter 501 is reduced to the predetermined ratio with respect to the initial value measured at a start of a maintenance work.SELECTED DRAWING: Figure 8
【課題】より確実に保守作業員の不安全な行動を検知し、誤報や失報を低減できるようにする。【解決手段】乗り場ドアを開放するための外部開放キー401に設けられた第1の送信機501と、墜落制止用器具のフック402に設けられた第2の送信機502と、第1の送信機501及び第2の送信機502が発信する電波を受信する、保守作業員が身に付ける受信部と、受信した電波の受信信号強度を測定する制御部と、を備える。制御部は、第1の送信機501からの受信信号強度が、保守作業開始時に測定した初期値に対して所定の比率まで低下したことが検出された後に、第2の送信機502からの電波の受信信号強度が、初期値に対して所定の比率まで低下しない間は、墜落制止用器具のフック掛けを促すアラームを鳴動させる。【選択図】図8
SAFETY CONFIRMATION SYSTEM AND SAFETY CONFIRMATION METHOD
安全確認システム及び安全確認方法
15.10.2024
Patent
Elektronische Ressource
Japanisch
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