Timer controlled measurement signal processing - using separate filtering, averaging and digitising of opposite polarity half waves for optimised signal-noise separation

摘要

The positive and negative half waves of an amplified measurement signal are filtered separately in time and averages of the positive and negative half waves formed over several cycles. The average values are digitised and their difference computed to form the measurement value. Where there are several measurement ranges, the signals are processed in amplifier channels dedicated to the ranges. The filtered average values from the separate channels are multiplexed. USE/ADVANTAGE - For timer controlled measurement signal processing in alternating light pyrometers with optimised signal-noise separation and enhanced temp. resolution.