Patent Number: 6,512,589

Title: Measurement transmitter and method for measuring a position of a sensing head with respect to a scale embodiment

Abstract: A position of a sensing head, which contains at least one sensor, is measured with respect to a scale embodiment which contains a linear code. The measurement is performed such that a predefined resolution is achieved. Firstly, an absolute value of an initial position is determined with at least the predefined resolution, for example by evaluating the signals from all the sensors at a standstill. During the measurement, the sensing head and the scale embodiment are moved relative to each other. Fewer sensors are used than would be needed at a standstill, for example, only a single sensor is used. The information needed to achieve the predefined resolution is obtained from sensor signals of the relative movement, which are derived from the linear code. In this way, a signal for the absolute position and the number of revolutions is determined, even at high speeds. The limits set by signal processing and signal transmission are much higher than in the case of known measurement transmitters.

Inventors: Rodi; Anton (Leimen, DE)

Assignee: HERA Rotterdam B.V

International Classification: G01D 5/245 (20060101); G01D 5/249 (20060101); G01D 5/12 (20060101); G01B 011/14 ()

Expiration Date: 01/28/2020