Product dimension measurement device has not-contact sensor elements placed at each end of an object to be measured for measuring the positions of the ends of the object and measures the distance between the elements

摘要

Measurement device for contactless determination of an extent (L) of a body (10) has two contact free measurement elements (40, 70) that are displaced in a measurement direction (M) relative to each other and generate first and second signals for the respective position (X1, X2) of points characterizing the limits of the expanding body. A third measurement element (25) generates a third signal representative of the distance (Z) between the two measurement elements. The signals are processed by a signal processing unit (84). By incorporation of a temperature sensor, especially a pyrometer length measurements can be corrected for temperature variations. The contact less measurement elements can be based on optical light barriers, electromagnetic sensors or ultrasonic sensors.