Patent ID: 6452508
Filing Date: 2002-09-17
Classification: E01F

Abstract:
An automatic cleaning device for a vehicle traffic detecting device and comprising at least one cleaning unit including:a fastener fastening the cleaning unit to a casing of the detecting device; a dispenser dispensing a transparent film; a contoured guide defining a path along which the dispensed film resides, a portion of the defined path being located in front of an element of the detecting device and thereby positioning a portion of the dispensed film in front of the element of the detecting device; an actuator for moving the dispensed film along the defined path; and a controller for automatically activating the actuator in response to a predetermined signal from the detecting device signifying that the portion of the dispensed film currently in front of the element of the detecting device is fouled, the actuator being activated by the controller to move the dispensed film a distance along the defined path such that the fouled portion of the dispensed film is moved beyond the front of the element of the detecting device and the portion of the dispensed film newly in front of the element of the detecting device is clean.