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Hitachi Introduces Elevator with Earthquake Control Operation System.

Tokyo, Japan, Jan 25, 2007 - (JCN) - Hitachi, Ltd. announced the release of a new elevator control system with earthquake detection built- in. This sensor detects long-period seismic waves and responds by stopping the elevator safely.

Compared with conventional elevators the new system can control the oscillation of long ropes, which are attached to elevators, for increased safety and convenience.

The long-period sensors, which are installed in the machine room, can detect the strength of an earthquake and they take into account the numerical value of the building's earthquake period, which is registered beforehand, to estimate the swaying of ropes from its initial swaying stage to its resolution in real-time.

If the amount of the rope swaying is small, the elevators will continue again to operate. However, if it is large then the elevators might stop. The lifts will start up after the ropes reduce their swing arcs.

Hitachi's elevator earthquake control operation system will be available in the beginning of February 2007.

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Publication:JCNN News Summaries
Date:Feb 6, 2007
Words:172
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