Pre-warning device used when elevator is close to landing door
An acousto-optic alarm device and elevator technology, applied in transportation and packaging, elevators, etc., can solve problems such as elevator safety accidents, threats to the personal safety of passengers, and uneven elevator maintenance quality, achieving simple structure and convenient installation. Effect
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[0014] Example: A safety pre-warning device for elevator near landing door, such as figure 1 As shown, the door interlock switch (1) is included, and the door interlock switch (1) is sequentially connected with the distance sensor (2), the controller (3), and the sound and light alarm device (4).
[0015] Working principle: The door interlock switch (1) is installed on both sides of the door, the elevator landing door is closed, the door interlock switch (1) is turned on, the distance sensor (2) starts to work, the number of distance sensors (2) is more than one, Installed on the elevator landing door, the probe of the distance sensor (2) faces the waiting hall for sending and receiving signals, and the controller (3) processes the signal to calculate the distance between the elevator and the elevator landing door. When the distance sensor (2) detects that the waiting distance of the elevator rider exceeds the distance set by the system, the system will send out an audible and vi...
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