Low-cost integrated multiple-sensor electronics

Gerard C. M. Meijer; Frank M.L. van der Goes; Paul C. de Jong; Xiujun Li; Ferry N. Toth

doi:10.1117/12.320175

20 July 1998 Low-cost integrated multiple-sensor electronics

Gerard C. M. Meijer, Frank M.L. van der Goes, Paul C. de Jong, Xiujun Li, Ferry N. Toth

Proceedings Volume 3328, Smart Structures and Materials 1998: Smart Electronics and MEMS; (1998) https://doi.org/10.1117/12.320175
Event: 5th Annual International Symposium on Smart Structures and Materials, 1998, San Diego, CA, United States

Abstract

The paper reviews the architecture and design of low-cost high-performance sensor systems. These systems consist of a number of multiplexed sensor elements, sensor-specific front-ends, modifies and microcontroller or digital signal processors (DSPs). Important properties that act as focus points for the system design are: adaptability, accuracy, dynamic range, speed, power consumption, reliability and costs. To enable low-cost design and implementation, a universal set-up, using universal components, is used. Universal sensor interfaces with front-ends for resistive, capacitive, resistive-bridge sensing elements, as well as voltage-, current- and charge-generating sensing elements are discussed. The analog sensor signals are converted to analog signals in the time domain using period-modulated oscillators. The A/D conversion of the time-domain signal can be implemented in the microcontroller or DSP. It is shown that, also in this case, the principles of the sigma- delta converters can be applied. As an example the paper deals with a systematic approach to the design of reliable, high-performance low-cost capacitive sensors. The problems and their solutions of both the physical- and the electrical-signal processing are discussed. The examples consider the application of capacitive sensors in position detectors, liquid-level detectors and personnel detectors.

Citation Download Citation

Gerard C. M. Meijer, Frank M.L. van der Goes, Paul C. de Jong, Xiujun Li, and Ferry N. Toth "Low-cost integrated multiple-sensor electronics", Proc. SPIE 3328, Smart Structures and Materials 1998: Smart Electronics and MEMS, (20 July 1998); https://doi.org/10.1117/12.320175

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