Torque and angle sensor development based on inductive technology

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Dr. Tevesz Gábor
Department of Automation and Applied Informatics

During the work on my thesis, I was developing a torque-and-angle (TAS) sensor unit based on inductive technology, this would measure the rotation and torque applied to the steering column of a vehicle.

First I worked out the concept of measurement based on inductive technology. For this I needed to do research on the topic (mainly on inductive technology and the production of flexible printed circuit boards). Then I started developing the schematics of the sensor. The schematics describe the logical connection between the components. These components include the PIC microcontrollers, the oscillating LC tanks and their exciters, and the parts that enable connection with outside sources.

After finishing and reviewing the schematics I developed the actual printed circuit boards (PCBs). I had to deal with the „rigid-flexible” PCB structures because the detectors are placed on flexible circuit boards and the controllers and other digital components are placed on a rigid board.

I made the first PCBs of the sensor, then revived the boards (which means I checked if they worked). For this I had to mount the modules on a testbench to check the frequency characteristics and the tolerances, and I also had to choose th ebest metallic target. Finally I collected the measurement data and analyzed them with Python scripts.


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