The development project for a bore hole sensor originally conceived by manufacturer Micro-Epsilon in 2009 has now resulted in this commercially available sensor product.
This miniature confocal sensor with diameter of just 3.5mm can be used for measuring bore holes with diameters of 4.0mm or higher. The sensor, which is rotated by an electric servomotor, 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. Similar to the standard linear systems, the confocal technology is suitable for numerous surface types. The sensor does not require any reference points during measurements, as it is able to recognise edges and steps.
Due to its compact installation length, the sensor can measure bore holes with depths of up to 90mm. In doing so, the sensor probe is guided into the bore hole using a linear unit provided by the customer (Bestech can assist with this). Depending on the application parameters, individual planes can be measured or a spiral profile of the bore hole can be produced. If different measuring ranges are required for a system, the sensor probe can be replaced easily and quickly. The system is used in industrial applications for quality inspection of bore holes in production lines or R&D test laboratories.
This bore hole sensor is now available in Australia and New Zealand from Bestech Australia Pty Ltd