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Heinrich Ruser

Ultrasonic-Microwave-Multisensor based on the Principle of Phase Coincidence

The potential of a combination of ultrasound and microwaves to improve existing sensors in terms of sensitivity and reliability is demonstrated. While noise and disturbances affect both waves differently, signal returns form target reflectors will be coherent. With data fusion performed on the signal level, the applicability is significantly improved compared with multisensors based on complementary sensor outputs. A compact low-cost sensor for the robust measurement of presence, velocity, and distance of objects, using 40 kHz ultrasound and 24 GHz microwaves, has been designed. Key issues for a smart sensor design, inherently exploited by the multisensor approach, are the adaptation to the environment, function monitoring, and plausibility tests.

tm – Technisches Messen, Oldenbourg Wissenschaftsverlag

Print ISSN: 0171-8096
Volume: 71, 03/2004
Pages: 184 - 191

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