A door switch inspection device (11) for detecting an abnormal condition of a landing door switch (4) used in an elevator. Each of a plurality of landing door switches (4) is disposed on a corresponding landing door at each landing floor for detecting an open/closed state of the landing door. The door switch inspection device (11) includes a plurality of voltage detection units (A, B, C, ... N) connected to the ground side of their respective landing door switches (4) for detecting a voltage value of their respective landing door switches (4), and a switch contact monitoring unit (9) for detecting an abnormal condition of a landing door switch (4), which is carried out by calculating a voltage difference between two adjacent floors and comparing the voltage difference with a threshold voltage.
AUTOMATIC DOOR SWITCH INSPECTION
AUTOMATISCHE TÜRSCHALTERINSPEKTION
INSPECTION D'INTERRUPTEUR DE PORTE AUTOMATIQUE
2023-04-05
Patent
Elektronische Ressource
Englisch
IPC: | B66B Aufzüge , ELEVATORS |
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