Method and device for controlling the position of an automatic door

Abstract

Abstract Method and device for controlling the position of an automatic door, the door position being controlled in dependence on the presence and behaviour of persons (7) in the fore-space and the automatic door. Persons (7) present on the fore-space area (5) of an entrance are subjected to infra-red radiation (3.1) in strips and the infra-red light reflexes (3.2) coming from the irradiated person (7) are recorded by an infra-red camera (1). A control and processing unit (10) generates signals for the door stop, door reversing, door opening and door closing. The infra-red camera has a vertically arranged LCD microshutter (1.2) and a vertically arranged CCD linear-image sensor (1.5), and signals are generated in the control and processing unit (10) in response to typical object-related contours of the reflex images (14) and their variations in time. For a better detection of relevant image signals, images with and without infra-red light (3.1) are recorded in turn. <IMAGE>

Inventors

• 👤 Guntram Dipl.-Ing. Begle

Bibliographic Details