Patent ID: 9010187
Filing Date: 2015-04-21
Classification: G01N

Abstract:
1. A scanner comprising: a chassis, a scanning assembly having an ultrasonic scanning array having a scanning direction, the scanning assembly having a rotating component rotatably mounted relative to the chassis, the rotating component comprising an ultrasonic couplant and having a peripheral contact surface for contacting a surface of a workpiece to provide ultrasonic coupling between the array and a surface of a workpiece such that movement of the chassis relative to a workpiece with the contact surface in contact with a surface of a workpiece results in rotation of the rotating component with the array orientated to keep the scanning direction perpendicular to the surface, and an encoder comprising a movement sensor, wherein; the sensor is arranged to sense a movement of the rotating component, and in which the array is rotationally adjustable relative to the chassis to provide a selectable fixed chassis position in use.