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Combined Capacitive and Ultrasonic Distance Measurement for Automotive Applications

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4 Author(s)
Schlegl, T. ; Inst. of Electr. Meas. & Meas. Signal Process., Graz Univ. of Technol., Graz, Austria ; Bretterklieber, T. ; Neumayer, M. ; Zangl, H.

This work presents a sensor fusion concept based on capacitive and ultrasonic techniques for distance measurement in automotive applications. Although ultrasonic sensors are a well accepted technology for distance sensing applications, they reveal drawbacks in the immediate vicinity of a vehicle. Capacitive sensors are suited for distance measurements of up to 0.3 m and may also provide information about the approaching object itself. The measurement range of the proposed fusion concept reaches up to 2 m whereby blind spots are avoided and means for object classification are provided. The feasibility of the approach and its robustness against environmental influences are demonstrated by means of experimental investigations.

Published in:

Sensors Journal, IEEE  (Volume:11 ,  Issue: 11 )