CDMA-based ultrasound localization of tools at assembly workstations

Project partner: Sarissa

Development of a system for the simultaneous tracking of the positions and orientations of almost any desired number of tools for quality assurance at assembly workstations


For quality assurance during manual handling processes in industrial assembly and logistics, systems for the recording of the position(s) and orientation(s) of work pieces and tools are used. For this purpose, robust, opto-acoustic systems based on unilateral distance measurement through time-of-flight measurement prevailed. Ultrasound transmitters are sending signals one by one in a time-division multiple access (TDMA) mode. Due to the ultrasound propagation time, only a limited amount of tools can be tracked permanently. Thus, the project goal is the development of a code-division multiple access (CDMA) based indoor localization system which allows the permanent, simultaneous transmission of code-modulated ultrasound signals for positioning. Hence, the limitations of TDMA systems regarding the amount of trackable tools can be overcome.



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This image shows Martin Oberdorfer

Martin Oberdorfer

M. Sc.

Research Assistant

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