Elevator door control device

Abstract

An elevator door control device is provided in which the precision of abnormality detection in door opening and closing operations is increased by appropriately detecting abnormalities in torque commands, so that there is little erroneous detection of abnormalities in door opening and closing operations. The elevator door control device has: a speed command portion that outputs a speed command; a speed control portion that outputs a torque command corresponding to a deviation between the speed command and a feedback speed; a reference torque command pattern storage portion that stores a plurality of torque command patterns that are formed by a plurality of the torque commands sampled according to door opening and closing operations, and stores a reference torque command pattern that is obtained based on the torque commands at each common sampling of the plurality of torque commands; an abnormality detection torque pattern generator portion that generates an abnormality detection torque pattern from the reference torque command pattern; and an abnormality avoiding unit that outputs an abnormality avoiding command to the speed command portion when the torque command exceeds the abnormality detection torque pattern.

Description

technical field [0001] The present invention relates to a control device for an elevator door, and more specifically, to a control device for an elevator door that avoids the abnormal state while detecting the abnormal state during the opening and closing of the elevator door with high precision. Background technique [0002] In the conventional elevator door control device, during the door opening and closing operation of the elevator, for the abnormal state of the elevator opening and closing operation, such as the elevator user's body or fingers being pinched or pulled into the door part, monitor the opening and closing operation of the door. In the abnormal state, the motor current increases, and at the same time, it detects whether there is any abnormality in the opening and closing action of the door, and when it is abnormal, the door is reversed. [0003] Specifically, focusing on the difference between the normal and abnormal motor currents that change simultaneously...

AI Technical Summary

Problems solved by technology

[0007] As described above, the conventional elevator door control device adds the torque waveform (motor current waveform) or the torque command waveform to the motor torque waveform (motor current waveform) or torque command waveform accompanying the actual door opening and closing operation without performing calculation processing. Predetermined margin torque is used for abnormality detection torque pattern for abnormality detection, but in reality, due to external disturbances caused by aging, such as garbage and friction around the door accompanying door opening and closing , the actual torque waveform or torque command waveform changes every time the door opens and closes

Therefore, when the added margin torque is too small, or the torque waveform or the torque command waveform that becomes the original waveform of the abnormality detection torque is not ideal, normal abnormality detection cannot be performed and false detection is performed. problems

[0008] That is, if the residual torque added to the torque command graph of the actual motor that is stored without calculation processing is set to a small value, the detection sensitivity of abnormal torque will increase, but due to the accompanying When the torque command increases due to torque fluctuations such as dust and friction near the door that opens and closes, it is judged to be abnormal, and unnecessary door reversal operations are repeated.

In addition, on the contrary, if the margin torque is increased, the malfunction is reduced, but on the opposite side, since the allowable value of the torque command increases as a result of the increase in the abnormality detection torque pattern, there is a risk of increasing the number of elevator users. issues such as sex

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