Elevator door control device

Abstract

The present invention provides an elevator door control device that improves the abnormal detection accuracy of the door opening and closing action by properly detecting the abnormality of the torque command, and reduces the false detection of the abnormal door opening and closing action. It is equipped with a speed command unit that outputs a speed command; The speed control unit of the torque command based on the deviation between the speed command and the feedback speed; store a plurality of torque command graphics formed by sampling a plurality of torque commands according to the door opening and closing action, and store the torque command graphics based on the multiple torque command graphics The reference torque instruction graph storage unit of the reference torque instruction graph obtained by each common sampled torque instruction; the abnormal detection torque graph generation unit that generates the abnormal detection torque graph from the reference torque instruction graph; when the torque instruction exceeds An abnormality avoidance unit that outputs an abnormality avoidance command to a speed command unit when an abnormality detection torque pattern is detected.

Description

technical field [0001] The present invention relates to a control device for elevator doors, and more specifically, to a control device for elevator doors that detects abnormal states during opening and closing of elevator doors with high precision and avoids the abnormal states at the same time. 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 a predetermined value to the torque waveform (motor current waveform) or torque command waveform of the motor accompanied by the actual door opening and closing operation without performing calculation processing. The residual torque is used for abnormal torque detection abnormality detection torque graph for abnormality detection, but in fact, 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 is opened and closed

Therefore, when the added surplus 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, there is a possibility that normal abnormality detection cannot be performed and false detection is performed. question

[0008] That is, if the residual torque added to the torque command graph of the actual motor that is not processed but stored is set to a small value, the detection sensitivity of torque abnormality will increase. However, due to the accompanying When the torque command increases due to torque fluctuations such as dust and friction near the door opening and closing the door, 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

Images