Patent ID: 6088923
Filing Date: 2000-07-18
Classification: G01B

Abstract:
A device for checking the geometry of a hole bored in a part, comprising:an external support equipped with means for moving the external support into and holding the external support in a fixed position relative to the hole and holding the external support in this position,a bearing piece mounted on the external support and capable of moving relative to the external support in a first direction that moves the bearing piece towards or away from the hole, the bearing piece having means for driving said movement and a sensor responsive to the position of the bearing piece relative to the external support,a sensing system including a sensor arm having an axis, mounted for pivoting relative to the bearing piece and carrying a contact member at one end and a source at the other end for protecting a light beam, the sensing system being mounted on the bearing piece and equipped with means for exerting on the sensor arm a transverse force tending to move the direction of the axis of the sensor arm away from the first direction and means for rotating the sensor arm about a rotation axis parallel to the first direction without moving it in the first direction relative to the bearing piece,a photo-sensitive sensor fixedly mounted on the bearing piece and having a sensitive surface on which the light beam impinges on the sensitive surface during rotation of the sensor arm, anddata processing means adapted to receive signals from the sensor responsive to the position of the bearing piece and signals from the photo-sensitive sensor and to deduce therefrom information relating to the shape of the hole.