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The BULKSCAN system measures volume throughput of any bulk materials on conveyer belts and determines the volumes of such materials in storage. The measured values can then be used for control and adjustment functions.
Measurement Principle
LMS sensors work according to theprinciple of time-of-flight measurement. A pulsed laser beam is emitted as a "measuring feeler". If it encounters an object (bulk material) it is reflected and the reflection is registered in the scanner‘s receiver. The time between transmission and reception of the impulse is directly proportional to the distance between the scanner and the object (time-of-flight). The pulsed laser beam is deflected by an internal rotating mirror so that a fanshaped scan is made of the surrounding area (laser radar). The contours of the target objects are determined from the sequence of impulses received.
The scanner's 2-dimensional contour data are transferred to the LMI evaluation unit via an RS422 data interface.
The volume or throughput at any particular time can be determined by combining this data with other known quantities such as, for example, belt speed (shaft encoder or analog value) or the density of the bulk material (analog input).
Application Scope
- Measurement of volume throughput of bulk material on conveyor belts
- Monitoring of transport equipment for coal or ore
- Measuring the ash removal in power plants
- Loading control of trucks, ships and freight train wagons
- Volume and mass measurement in gravel works
- Other operations in the building materials industry
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