Magnetic sensor arrangement for determining speed of a moving body, such as a piston, and its associated signaling device move past a sensor that is both simple and cost-effective

摘要

Method for determining the speed with which a position signaler (1) passes a sensor arrangement (2) that generates a signal when the position signaler passes it. The signal from the sensor arrangement is processed and the width of the signal impulse is proportional to the speed with which the piston passes the signaler. The sensor is an array of two permanent magnets (1a, 1b) while the sensor is a Hall or GMR sensor. An Independent claim is made for a method for determining acceleration is which two position signalers are arranged adjacent to each other so that two signal pulses are produced. The difference in the width of the two pulses can be used to determine the acceleration. An Independent claim is made for a sensor arrangement for determining the velocity or acceleration of a position signaling device.