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Article
Publication date: 1 March 2001

Céline Corbrion, Thierry Ditchi, Stephane Holé, Eric Carreel and Jacques Lewiner

On‐board absolute speed sensors would be very useful in automotive applications in order to perform the measurement of the speed independently of the wheel rotation…

Abstract

On‐board absolute speed sensors would be very useful in automotive applications in order to perform the measurement of the speed independently of the wheel rotation. Narrow beam Doppler sensors give a good accuracy but only operate if there is a reflecting obstacle in the antenna footprint on the road. Broad beam Doppler sensors have the advantage of offering a higher probability of getting a reflected wave, but they require multiple frequencies. A novel sensor is presented. It uses a single frequency emission, which leads to low cost devices. Simulations and measurements have been carried out which show that it is particularly well adapted to high‐risk situations, for instance icy or very wet road surfaces, when only a few reflecting obstacles are present. In such situations, the accuracy of the measurement is typically of the order of 0.5 per cent.

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Sensor Review, vol. 21 no. 1
Type: Research Article
ISSN: 0260-2288

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Article
Publication date: 1 December 2003

Jérôme Lucas, Christophe Batis, Stéphane Holé, Thierry Ditchi, Claude Launay, Joaquim Da Silva, Hervé Dirand, Laurent Chabert and Marc Pajon

The Federal Motor Vehicle Safety Standards No. 208 includes directives rendering the morphological estimation of passengers mandatory for advanced air bag systems. The…

Abstract

The Federal Motor Vehicle Safety Standards No. 208 includes directives rendering the morphological estimation of passengers mandatory for advanced air bag systems. The dynamic automatic suppression system uses both the morphological and positional information about the passenger to allow or prevent air bag deployment. Various solutions have been proposed to obtain these information by using capacitive sensors. This paper presents a method, that makes possible use of such sensors in the car industry by correcting their responses from these perturbing parameters.

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Sensor Review, vol. 23 no. 4
Type: Research Article
ISSN: 0260-2288

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Article
Publication date: 1 December 2002

Clive Loughlin

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Sensor Review, vol. 22 no. 4
Type: Research Article
ISSN: 0260-2288

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Article
Publication date: 1 December 2004

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181

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Sensor Review, vol. 24 no. 4
Type: Research Article
ISSN: 0260-2288

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