Patent ID: 7984590

Claim:
An automatic door apparatus comprising: a pair of doors opening and closing by moving on a same vertical plane; a pair of moving device moving the pair of doors individually; a controller controlling the pair of moving device; a pair of two-dimensional image sensors for detecting a moving object at both sides of the pair of doors; and a pair of spare sensors for detecting a moving object at both sides of the pair of doors, wherein the controller includes: an image processor processing an output of the two-dimensional image sensors; a moving status calculator individually recognizing the moving object and calculating a position and a moving direction of the moving object from an image processing signal of the image processor wherein the moving status calculator judges if the image processor is one of disabled due to an apparatus trouble or due to an optical condition and not disabled; an opening degree calculator predicting a passing position of the moving object on the vertical plane on the basis of the position and moving direction of the moving object calculated by the moving status calculator and calculating a target opening degree of each of the doors on the basis of the predicted passing position when the moving object approaches, and determining the target opening degrees of the doors in fully closed state when the moving object moves away; a first move command unit outputting move command signals to the pair of moving device so that the doors may be opened to the calculated target opening degrees; and a second move command unit outputting move command signals to the pair of moving device to open the doors fully immediately or after the moving object is detected by the spare sensor if the moving status calculator cannot calculate the position and moving direction of the moving object due to individual recognition failure of the moving object in the crowd even if the moving status calculator indicates the image processor is not disabled.