Patent ID: 8875441
Filing Date: 2014-11-04
Classification: E05F,E05Y,G01S

Abstract:
1. An adaptive ultrasound detecting system for a door assembly, the door assembly being for closing a door entrance and including a door movable along a path; the system comprising: an ultrasound transducer assembly including a plurality of ultrasound transducers mounted to the door assembly adapted to emit at least one ultrasound detecting beam within the door path, to receive an echo indicative of a body located within the door path when the body intersects one of the at least one ultrasound detecting beam, and to trigger a detecting signal indicative of the body within the door path; a controller coupled to the ultrasound transducer assembly adapted for receiving information indicative of a position of the door along the path, and for varying the emission of at least one ultrasound detecting beam in accordance to the position of the door relative to the at least one detecting beam; wherein varying the emission of at least one ultrasound detecting beam includes temporarily triggering off at least one of the plurality of ultrasound transducers; wherein temporarily triggering off at least one of the plurality of ultrasound transducers includes sequentially triggering off each of the at least one of the plurality of ultrasound transducers before the door penetrates the corresponding one of the at least one ultrasound detecting beam.