To accurately detect presence/absence of stability failure in which a movement of a movable member of an electromagnetic brake of an elevator fluctuates at random.SOLUTION: A brake diagnostic system according to the embodiment includes an obtaining part, a calculating part, and a determining part. The obtaining part obtains an electric current waveform representing a change of the value of the electric current flowing in a coil of an electromagnetic brake in an operation section in which a movable member moves at the time of braking or releasing of the electromagnetic brake. The calculating part calculates a difference level between an electric current waveform in the operation section at the time of N-th braking of the electromagnetic brake and the electric current waveform in the operation section at the time of N-1-th braking of the electromagnetic brake, or a difference level between an electric current waveform in the operation section at the time of N-th releasing of the electromagnetic brake and the electric current waveform in the operation section at the time of N-1-th releasing of the electromagnetic brake. The determining part determines presence/absence of a stability failure in which a movement of the movable member fluctuates at random based on a distribution of the difference level of the predefined times.SELECTED DRAWING: Figure 4
【課題】エレベータの電磁ブレーキの可動部材の動きがランダムに変動する安定性不良の有無を精度よく検知できるようにする。【解決手段】実施形態に係るブレーキ診断システムは、取得部と、算出部と、判定部と、を備える。取得部は、電磁ブレーキの制動時または解放時の可動部材が動く動作区間において電磁ブレーキのコイルを流れる電流の値の変化を表す電流波形を取得する。算出部は、電磁ブレーキのN回目の制動時の動作区間の電流波形と電磁ブレーキのN−1回目の制動時の動作区間の電流波形との相違度、または、電磁ブレーキのN回目の解放時の動作区間の電流波形と電磁ブレーキのN−1回目の解放時の動作区間の電流波形との相違度を算出する。判定部は、所定回数分の相違度の分散に基づいて、可動部材の動きがランダムに変動する安定性不良の有無を判定する。【選択図】図4
BRAKE DIAGNOSTIC SYSTEM AND BRAKE REMOTE DIAGNOSTIC DEVICE
ブレーキ診断システムおよびブレーキ遠隔診断装置
2020-06-04
Patent
Electronic Resource
Japanese
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