Elevator safety system
AssigneeOtis Elevator Company
InventorPeter Herkel
Life of this patent
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Abstract
An elevator safety system (20) for an elevator system (2) with a self-diagnostic functionality includes at least two safety channels (22a, 22b), wherein each safety channel (22a, 22b) is configured for supplying a safety signal (23a, 23b) in case a safety issue has been detected. The elevator safety system (20) comprises a self-diagnostic evaluator (24), which is configured for receiving any safety signals (23a, 23b) supplied via the safety channels (22a, 22b); starting a timer (25) for measuring a predetermined period of time in case a safety signal (23a, 23b) is supplied on one of the safety channels (22a, 22b); and stopping any further operation of the elevator system (2) in case the received signal (23a, 23b) is still supplied after the predetermined period of time has expired.
Claims13
Elevator safety system (20) for an elevator system (2) with a self-diagnostic functionality including at least two safety channels (22a, 22b), each safety channel (22a, 22b) configured for supplying a safety signal (23a, 23b) in case a safety issue has been detected;
- wherein the elevator safety system (20) comprises a self-diagnostic evaluator (24), which is configured for receiving any safety signals (23a, 23b) supplied via the safety channels (22a, 22b);
- starting a timer (25) for measuring a predetermined period of time in case a safety signal (23a, 23b) is supplied on one of the safety channels (22a, 22b);
- and
- stopping any further operation of the elevator system (2) in case the safety signal (23a, 23b) is still supplied after the predetermined period of time has expired;
- wherein the self-diagnostic evaluator (24) is configured for stopping any further operation of the elevator system (2) in case safety signals (23a, 23b) are simultaneously supplied on at least two safety channels (22a, 22b) and/or in case a further safety signal (23b, 23a) is supplied on another safety channel (22b, 22a) before the predetermined period of time has expired.
Elevator safety system (20) for an elevator system (2) with a self-diagnostic functionality including at least two safety channels (22a, 22b), each safety channel (22a, 22b) configured for supplying a safety signal (23a, 23b) in case a safety issue has been detected;
- wherein the elevator safety system (20) comprises a self-diagnostic evaluator (24), which is configured for receiving any safety signals (23a, 23b) supplied via the safety channels (22a, 22b);
- starting a timer (25) for measuring a predetermined period of time in case a safety signal (23a, 23b) is supplied on one of the safety channels (22a, 22b);
- and
- stopping any further operation of the elevator system (2) in case the safety signal (23a, 23b) is still supplied after the predetermined period of time has expired;
- wherein the self-diagnostic evaluator (24) is configured for resetting the timer (25) in case the received safety signal (23a, 23b) is not supplied anymore after the predetermined period of time has expired and no further safety signal (23b, 23a) has been supplied on another safety channel (22b, 22a) before the predetermined period of time has expired.
Method of operating an elevator safety system (20) system with a self-diagnostic functionality including at least two safety channels (22a, 22b), each safety channel (22a, 22b) configured for supplying a safety signal (23a, 23b) in case a safety issue has been detected;
- wherein the method comprises:
- starting a timer (25) for measuring a predetermined period of time in case a safety signal (23a, 23b) is supplied on only one of the safety channels (22a, 22b);
- stopping any further operation of the elevator system (2) in case the supplied safety signal (23a, 23b) is still supplied after the predetermined period of time has expired;
- wherein the method further includes stopping any further operation of the elevator system (2) in case safety signals (23a, 23b) are simultaneously supplied on at least two safety channels (22a, 22b) and/or a further safety signal (23b, 23a) is supplied on another safety channel (22b, 22a) before the predetermined period of time has expired.
Method of operating an elevator safety system (20) system with a self-diagnostic functionality including at least two safety channels (22a, 22b), each safety channel (22a, 22b) configured for supplying a safety signal (23a, 23b) in case a safety issue has been detected;
- wherein the method comprises:
- starting a timer (25) for measuring a predetermined period of time in case a safety signal (23a, 23b) is supplied on only one of the safety channels (22a, 22b);
- stopping any further operation of the elevator system (2) in case the supplied safety signal (23a, 23b) is still supplied after the predetermined period of time has expired;
- wherein the method further includes resetting the timer (25) in case the safety signal (23a, 23b) is not supplied after the predetermined period of time has expired and no further safety signal (23b, 23a) has been supplied on another safety channel (22b, 22a) before the predetermined period of time has expired.
Dependencies are inferred from the claim text.