A Summary of Rotational Speed Measurement Techniques for Bearing and Rotor Systems—Part I

Rotational speed measurement is a fundamental technology used in various industries to monitor and control the speed of rotating equipment. Accurate speed measurement is crucial for optimizing performance, ensuring safety, and monitoring equipment health. This summary explores different techniques used for measuring rotational speed, which are categorized into analog, digital, and hybrid analog-digital methods. Analog methods convert rotation into proportional signals in other media, while digital methods convert rotation into a series of electrical pulses with the number of pulses proportional to the speed. Hybrid analog-digital methods convert rotation into proportional signals and calculate the frequency of the signal to obtain speed. This summary provides guidance for the design, optimization, and application of rotational speed measurement solutions in the industry.