Door opening/closing control device

Abstract

A device for controlling a speed of a door includes a detecting unit that detects a position of the door, and a control unit that controls the speed of the door in such a manner that an acceleration of the door becomes substantially zero at a point that is calculated based on the position. Thus, a target maximum speed of the door is adjusted depending on the remaining moving distance.

1 . A device for controlling a speed of movement of the door, comprising: 
 a detecting unit configured to detect a present position of the door; and    a control unit configured to control the speed of the door in such a manner that an acceleration of the door becomes substantially zero at a point that is calculated based on the present position.    
   
   
       2 . The device according to  claim 1 , wherein the control unit is configured to control the speed of the door in such a manner that a maximum speed of the door is rather low when a distance between the present position and a destination position is shorter than a threshold, the destination position being any one of a position at which the door is completely closed and a position at which the door is fully open.  
   
   
       3 . The device according to  claim 1 , further comprising a detecting unit configured to detect a posture of the door, wherein 
 the control unit is configured to control the speed of the door in such a manner that a deceleration of the door starts at a point that is calculated based on the posture, wherein    the point at which the acceleration of the door becomes substantially zero is calculated based on the point at which the deceleration starts.    
   
   
       4 . A method of controlling a speed of movement of the door, comprising: 
 detecting a present position of the door; and    controlling the speed of the door in such a manner that an acceleration of the door becomes substantially zero at a point that is calculated based on the present position.    
   
   
       5 . The method according to  claim 4 , wherein the controlling includes controlling the speed of the door in such a manner that a maximum speed of the door is rather low when a distance between the present position and a destination position is shorter than a threshold, the destination position being any one of a position at which the door is completely closed and a position at which the door is fully open.  
   
   
       6 . The method according to  claim 4 , further comprising: 
 detecting a posture of the door; and    controlling the speed of the door in such a manner that a deceleration of the door starts at a point that is calculated based on the posture, wherein    the point at which the acceleration of the door becomes substantially zero is calculated based on the point at which the deceleration starts.