Design and analysis of resonant inductive position sensor using spiral technology

Abstract

In general, many sensing technologies are available to sense the newlinemeasurands such as current, voltage, position, speed, direction, pressure, newlinetemperature, acceleration etc. Of these measureands, position is the one used newlinein many applications such as feedback systems. It is used in linear and rotary newlinesensors. Many sensing technologies are used to sense the positions. These newlinetechnologies are either contact or non-contact sensing. Mostly, the magnetic newlinesensing technologies are used in position sensing applications. Among these newlinemagnetic sensing technologies, the Resonant Inductive Position Sensing newline(RIPS) technology has wide range of applications in aerospace, automotive, newlineindustry and a lot more, where position sensors are used. This is a contactless newlinesensor used for detecting linear or angular position. As this is non-contact newlinetype sensing, it is gaining confidence due to its wear free sensing. This is newlinereliable and has high speed and long life and is directly compatible with other newlineelectronic circuits. This is more economical due to low-cost components and newlinesimple electronics.As this technology uses the spiral inductors, the positional accuracy newlineof sensor depends on the dimensions of spiral inductors, coupling between newlineexcitation coil and resonator and output coils sine and cosine coils. An newlineaccurate prediction of inductance of these spiral inductors and sensor output newlinecharacteristics are very critical in sensor design. The proposed method uses newlineanalytical approach to predict the inductance of spiral inductors with shape of newlinerectangular, sine and cosine as well as the sensor outpu newline newline