PROXIMITY SENSOR CABLE COMPENSATION USING MULTIPLE FREQUENCIES

摘要

A system and method for determining characteristics of a proximity sensor (102). According to a preferred embodiment, the admittance of a proximity sensor/cable assembly (102, 104) is measured at two frequencies. Assumptions about sensor characteristics and cable characteristic are made, and an admittance corresponding to the assumed characteristics is derived. The assumptions are adjusted to obtain a correspondence between the measured admittance and the derived admittance. When the assumptions have been updated a specified number of times or when a desired accuracy threshold has been met, the adjusted assumptions may be used to determine one or more sensor characteristics, such as the separation (108) between the proximity sensor and the target object.