| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a signal transmission device of an elevator capable of properly transmitting signals, even if an output voltage of a power supply device is lowered. <P>SOLUTION: The signal transmission device of the elevator has a master station 2 arranged in the control board 1 of the elevator, a slave station 7 arranged in the landing place or the car of the elevator, the power supply device 10 supplying power to one of the master station 2 and the slave station 7 via an electric wire 12, a voltage dividing means R2 using the voltage supplied from the power supply device 10 in the electric wire 12 near one of the master station 2 and the slave station 7 and dividing the signal transmitted via a signal line 8 from the other of the master station 2 and the slave station 7 to the one near the one of the master station 2 and the slave station 7, an observing means 16 observing the voltage supplied to the voltage dividing means from the power supply device 10 by the electric wire 12 near one of the master station 2 and the slave station 7, and a control means 7 controlling the voltage dividing means R2 such that the value of the voltage when dividing the signal becomes the range capable of being normally determined by one of the master station 2 and the slave station 7 based on the value of the voltage observed by the observing means 16. <P>COPYRIGHT: (C)2012,JPO&INPIT |
