Multi-DSP Hierarchical Architecture with Feild-Programmable Logic for Hard-Field Tomography Sensors

The system reported in here is aimed to perform multi-channel sensor measurements and data processing of a type widely used in hard-field tomographic sensing. It is implemented as a complete tomography system, capable of imaging from incomplete data and with limited resources. The system´s architecture is modular and reconfigurable, to allow easy expansion as well as a number of applications. As a direct demonstration of the distinctive characteristics of the proposed system, a special case is studied: the application of guided path tomography sensors for temperature mapping. The temperature distribution is obtained from ac measurements of the temperature-induced resistance changes in an array of non-interacting transducers. Then, lock-in detection is applied at each channel to extract the information which is further processed and sent trough a high speed interface.