General purpose interface device design for automotive sensors

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Scherer Balázs Attila
Department of Measurement and Information Systems

The AE/ESI department of the Robert Bosch Kft. is engaged in automotive sensor development. In the final phase of the sensor development, the finished products are subject to inspection and functional tests under pre-determined environmental conditions. During the electrical measurements, the validity and stability of the parameters characterising the specific sensor are monitored. The measurement data collecting and processing hardware-software components, which are necessary for these analysis, are developed by the measurement engineering group.

Due to the complexity of the measurement systems, the monitoring is stationary, moving the equipment would be hard to implement. In addition numerous test sequences are running simultaneously, therefore challenges of measurement capacity have to be faced as well.

The aim of this thesis is to design such an interface, with which the pretesting can be performed without a complex measurement system. This unit has to be a mobile, multi-sensor interface, which has to operate as a test panel for the specified measurements.

In current study, I will summarize the main features and development of automotive sensor types and their communication interface versions. After that I will design the schematics and PCB layout of the interface unit and define the required components. Following that, I will study the basics of the microcontroller programming. Finally, I will implement a measurement program and perform the related test measurements on the physically produced circuit boards.


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