Measurement method for aviation-specific proximity sensor

摘要

A measurement method for an aviation-specific inductive proximity sensor (IPS for short) includes steps of: 1) building a measurement circuit, wherein an IPS comprises an internal resistance r and an inductance L; 2) building a look-up table, wherein the step 2) specifically comprises steps of: sampling a first voltage measured value U₁ corresponding to a first constant delay time T₁ with the ADC; sampling a second voltage measured value U₂ corresponding to a second constant delay time T₂ with the ADC; then obtaining voltage discharge formulas U₁(T₁, R, r, L) and U₂(T₂, R, r, L) of an r-L circuit; and 3) compressing the look-up table, utilizing the compressed look-up table for calculation during measurement. The present invention ensures that the system works within a standard temperature range, and improves measurement stability, reliability, and real-time performance. Furthermore, there is no floating point calculation, which saves CPU or MCU hardware resources.