Turning Sensor Noise Into Signal: FFT and Power Spectrum Features
How we used Welch’s method and grouped Polars operations to extract frequency-domain features from 180+ sensors — and improved anomaly detection by 11% The Problem With Raw Sensor Data If you’ve ever worked with industrial sensor data, you know the feeling. You’re staring at a time-series plot — vacuum pressure oscillating, milk yield pulsing, hydraulic oil pressure fluctuating — and somewhere in that mess is a signal that says “this machine is about to break down.” Our project monitors milking robots at dairy farms. Each robot has […]