Multi-cell sonic sensor

The VÖGELE multi-cell sonic sensor is highly versatile. By calculating an average, it can compensate for brief irregularities in a reference. The sensor is capable of scanning not only the ground, but also references such as a stringline or tensioned rope with a minimum thickness of 0.1 in (2.5 mm). To do that, the sensor is positioned perpendicular to the direction of motion, meaning it is rotated through 90° relative to the “Ground mode” position. The screed operator switches from “Ground mode” to “Stringline mode” in the Niveltronic Plus menu at the press of a button. An average is then no longer calculated; only the sound cone closest to the reference is used for grade control. In this mode, a reference can be copied on a 1:1 basis just as with the single-cell sonic sensor.

The single-cell sonic sensor emits just one sound cone, meaning it copies references 1:1, with no averaging. This allows a wide variety of references to be scanned, with the sensor being easily adapted to different job site conditions. It is also quick and easy to install and operate.

This sensor determines the temperature compensation value with the aid of a metal bow located a fixed distance from the sensor. Part of the sound cone reaches this bow, and measures the distance. If the value measured deviates from the actual value, the difference serves as a correction value for the sensor.