| 摘要 |
A sensor positioning apparatus comprising a mounting plate, a sensor housing, a sensor assembly pivotally mounted to the sensor housing, and a sensor pivotally mounted within the sensor assembly. The sensor housing includes an upper plate and a base plate connected in a spaced relationship and a central axis. The upper plate is coupled to the mounting plate and the base plate includes a socket adapted to receive a ball joint. The sensor assembly is carried by the housing and comprises a cylindrical body having an opening therein and defining a body axis. The sensor assembly also includes a piston within the body movable between a retracted and an extended position, a ball joint rotatably coupled to the base plate socket, a resilient member for maintaining the body axis substantially coaxial with the central axis, and three contact members for contacting a surface and orienting the sensor assembly normal to the surface. The sensor is pivotally coupled to the piston within the sensor assembly body for orienting the sensor normal to the surface when the piston is in the extended position.
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