Contactless position sensing using piezoresistive pressure sensor

An improved range with new principle is developed for contactless position sensing using piezoresistive position sensor. An attempt is made in devising a transducer based on piezoresistive principle for contactless position measurement. The sensor has non-contact and non-optical nature which is advantageous in many applications. However, in order to be competitive with existing sensors, we intend to improve the accuracy considerably. An attempt has been made to analyze the existing position measurement systems and to propose an improved sensor version for the same which is cost effective. The idea presented in this paper contributes in developing a new contactless position sensor for industrial applications which is cheaper and accurate with noise levels in sub angstrom and stable with temperature over the existing ones.