The development project for a bore hole sensor originally conceived by manufacturer Micro-Epsilon in 2009 has now resulted in a new sensor for the inspection of the internal walls of bore holes. Introduced in Australia by Bestech , this miniature confocal sensor with diameter of just 3.5mm can be used for measuring bore holes with diameters of 4.0mm or higher.
Rotated by an electric servomotor, the new sensor can measure a number of bore hole characteristics, including diameter, roundness, concentricity, tapers and straightness. A sophisticated integrated precision ball bearing system provides the required rotation stability.
The bore hole inspection system comprises of a stainless steel measuring head with integrated mechanics, a sensor probe with integrated confocal sensor, as well as two controllers. The sensor does not require any reference points during measurements, as it is able to recognise edges and steps and is suitable for numerous surface types. Thanks to its compact installation length, the sensor is capable of measuring bore holes with depths of up to 90mm.
The sensor probe can be replaced easily and quickly should there be a need for different measuring ranges.
The system is used in industrial applications for quality inspection of bore holes in production lines or R&D test laboratories.