Invention Grant
- Patent Title: Condition monitoring method
- Patent Title (中): 状态监测方法
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Application No.: US12465221Application Date: 2009-05-13
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Publication No.: US07708118B2Publication Date: 2010-05-04
- Inventor: Tapio Tyni , Pekka Perälä
- Applicant: Tapio Tyni , Pekka Perälä
- Applicant Address: FI Helsinki
- Assignee: Kone Corporation
- Current Assignee: Kone Corporation
- Current Assignee Address: FI Helsinki
- Agency: Birch, Stewart, Koalsch & Birch, LLP
- Priority: FI20061090 20061208
- Main IPC: B66B1/34
- IPC: B66B1/34
Abstract:
Method for the condition monitoring of the safety switches of the safety circuit of an elevator. Inferences can be made about the condition of a safety switch by measuring and examining the current of the safety circuit of the elevator after the state of the safety circuit has changed. The current signal is filtered, after which the amount of interference caused by contact malfunctions of the switch is determined from it. Based on the amount of interference it is possible to determine in what condition the switch is.
Public/Granted literature
- US20090218176A1 CONDITION MONITORING METHOD Public/Granted day:2009-09-03
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