Periodic electrical signal amplitude determination procedure for car tire side wall deformation sensors uses integration between null crossings found by trigger

摘要

A periodic electrical signal (1) amplitude determination procedure integrates the signal between two successive null crossings found by a trigger unit (7) and calculates (5) the amplitude as the quotient of the digitized (15) integrated (4) value and the integration time. Includes Independent claims for equipment using the procedure and for the use of constant signal offset, noise filtering, and trigger unit sensitivity adjustment depending on the periodic signal. The null crossings can be used to determine the relative phase of two signals.