What Signals Does a Magnetic Scale Output?

A magnetic scale is a sensor used to measure linear displacement; its output is a voltage signal proportional to the measured displacement. A magnetic scale typically consists of a fixed magnetic ruler and a moving read head. As the read head moves along the magnetic ruler, the sensor generates a voltage proportional to displacement.

The working principle relies on changes in the magnetic field. The magnetic ruler has a series of magnetic stripes, and the read head contains sensors that detect field changes. Movement causes pulses whose frequency and count correlate with displacement; these pulses can be used to calculate displacement and interface with digital displays, computers, or control systems. Magnetic scales provide high pulse accuracy and fast response, making them widely used in industrial automation.

In short, a magnetic scale outputs a voltage or pulse signal proportional to displacement, making it an important sensor for linear measurement and control.