Electronic elevator guard device and method for monitoring a set of integrity states of a plurality of elevator features

An electronic elevator guard device for monitoring a set of integrity states of a plurality of elevator features of an elevator, the electronic elevator guard device comprising:

• a sensor installed in the elevator and adapted to monitor a first integrity state of the set of integrity states, the sensor generating a first monitoring signal based on a sensed current status of the first integrity state;
• a questioning device including or communicating with a human-machine interface and adapted to ask predetermined questions to a consulted person and to receive answers of the person via the human-machine interface, the questions relating to a second integrity state of the set of integrity states, the questioning device generating a second monitoring signal based on at least one of the answers, wherein the questioning device asks the questions at time intervals being longer than a predetermined minimum time interval;
• and
• an evaluation device connected to the sensor and to the questioning device, the evaluation device generating an overall monitoring signal based on the first monitoring signal and the second monitoring signal, the overall monitoring signal indicating a current safety status of the elevator.

A method for monitoring a set of integrity states of a plurality of elevator features of an elevator, the method comprising the steps of:

• monitoring a first integrity state of one of the elevator features using a sensor installed in the elevator and generating a first monitoring signal based on a sensed current status of the first integrity state;
• asking predetermined questions to a consulted person and receiving answers to the questions from the person using a questioning device communicating with a human-machine interface, the questions relating to a second integrity state of another one of the elevator features, and generating a second monitoring signal based on at least one of the answers;
• and
• generating an overall monitoring signal based on the first monitoring signal and the second monitoring signal, the overall monitoring signal indicating a current safety status of the elevator.

An electronic elevator guard device for monitoring a set of integrity states of a plurality of elevator features of an elevator, the integrity states being related to a safety status of the elevator, the electronic elevator guard device comprising:

• at least one sensor installed in the elevator and adapted to monitor at least a first integrity state of the set of integrity states, the sensor generating a first monitoring signal based on a sensed current status of the first integrity state;
• a questioning device including or communicating with a human-machine interface and adapted to ask predetermined questions to a consulted person and for receiving answers of the person via the human-machine interface, the questions relating to a second integrity state of the set of integrity states, the questioning device generating a second monitoring signal based on at least one of the answers, wherein the questioning device asks the questions at time intervals being longer than a predetermined minimum time interval;
• and
• an evaluation device connected to the at least one sensor and the questioning device, the evaluation device generating an overall monitoring signal based on the first monitoring signal and the second monitoring signal, the overall monitoring signal indicating a current safety status of the elevator.