Advertisement feature Materials handling & conveyors
Saving shipping costs with light section sensors A
newly developed function of UniWare (a warehouse management software from Unitechnik Cieplik &
Poppek AG) supports the three-dimensional measure- ment of packages – from padded letters to parcels mea- suring 750 x 500 x 500mm. Volume measurement and weight determination allow the least expensive delivery service to be selected. The optimum sensor solution for this task: light section sensors from Leuze electronic The packages to be scanned are transported by
conveying belt. The items on the conveying belt can be in any position. As the items pass through the mea- suring station, their length, width and height as well as their weight are determined. A continuous scale unit as well as three Leuze electronic LPS 36 light section sensors are used for this. The sensors are attached at different angles to a measuring gate (as pictured). Rather like a laser scanner or light barrier, Leuze
electronic light section sensors detect the presence of objects – even in undefined object positions. They do not work with individual light spots; instead they project a divergent light beam using a laser line illumination up to 600mm wide. The LPS 36 light section sensors used in the application are specifically intended for 2D/3D object measurement. Each sensor emits a line with 376 measuring points. The lasers and receivers are contained together in an easy-to-install unit. A connection on the sensor for a standard
incremental encoder supports the generation of calibrated 3D data. In this way, the incremental
transmitter, which is directly connected to one of the sensors, sends information about the path traveled by the items. Transmission of the measurement data and configuration of the sensor take place via the Ethernet. The distances to the target points are determined every 10 ms and transmitted to UniWare. Measurement con- tinues until all sensors "see" only the conveying belt. UniWare determines the largest possible cuboid
which envelopes the resulting cloud of laser points and defines the dimensions of the letter or parcel on the basis of this information. The measured dimensions and the weight are used to select the least expensive delivery service, e.g. DHL, UPS, FedEx and so on. The volume measurement application is
programmed in such a way that it can be used with any number and type of sensors. This allows the system to be adapted for various different applications. For example, it can be used to detect empty containers or to measure air freight pallets or containers. The latter could be used as the basis for planning aircraft loads. High
demands with regard to availability can be met by arranging several measuring stations one after the other. Leuze electronic GmbH + Co. KG Gary Hockin, Tel. 01480 408500
gary.hockin@leuze.co.uk
Special variant LPS 36 HI with even higher resolu- tion Unlike "normal" LPS 36 light section sensors with resolutions from 1 to 3 mm like those used by Unitechnik, the new LPS 36 HI variants provide resolutions up to 0.1 mm. At vertical distances of 200 to 600 mm, these variants are used for the economical object detection of items which are even smaller than 3mm. Here too, an additional connection for a standard incremental encoder supports the generation of calibrated 3D data. As a result, this special variant can provide excellent solutions for, for example, robot controllers for pick-and-place applications as well as positioning tasks in packaging and assembly. In areas where once complex sensor solutions, sensor combinations or additional evaluation units were necessary, the LPS 36 HI light section sensors with their excellent resolution are opening up application fields which were previously the domain of camera systems – with a considerably lower capital investment.
Measuretaker
When it comes to developing innovative optoelectronic distance sensors we get very fussy. And sometimes this love of detail is actually written in our face. The result of this passion is solutions that bring you genuine added value – and us, satisfi ed customers.
Welcome to the specialists for optoelectronic sensors – welcome to the sensor people
LPS and LRS light section sensors for object measurement and detection as an economical alternative in new areas of application.
Further information and product details at
www.leuze.co.uk
For more information call 01480 408 500 or go to
www.leuze.co.uk Follow us on
@LeuzeUK
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