Non-contact optical motion sensors with two orthogonal measuring axes

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Cologne INTACTON GmbH, a subsidiary of the FRABA group, has developed an optical sensor system which can replace contact-based measuring wheel systems in many areas.

The OPTIPACT system is the first motion sensor for industrial applications which offers synchronous measurement of two orthogonal axes.

This feature makes it possible to detect two-dimensional movements in any direction, rendering cumbersome adjustment and calibration unnecessary. Because the measuring process is based on an optical correlation method, no external reference pattern is needed. The device is able to directly measure on rough or structured surfaces.

Errors caused by slip and accumulated dust or dirt are thereby avoided, which results in considerable benefits for a variety of applications such as automated guide vehicles (AGV) where the position of vehicles is usually determined by means of an encoder fitted with a pull wire or measuring wheel.

The OPTIPACT enables direct, reliable measurement of relative movements and speed, ensuring smooth operation and improved availability.

The sensors are available with a speed range of up to ±4 m/s. Depending on the type, they have a maximum resolution of 15 µm. The system features an incremental interface and can be used as a direct drop-in replacement for incremental encoders with measuring wheels.