Delphi Technologies, Inc.

Université Louis Pasteur

Olivier R Marroux

Laurent Tupinier

Bernard Kress

Mandiaye Ndao

Johann Michel

Paul-Antoine Tritschler

Patrick Meyrueis

Lionel Ocard

Nandiaye Ndao

Paul Antoine Tritschler

Johan Michel

An angle sensor for detecting an out-of-round condition includes a disc supporting angle coder rigidly attached to a rotating shaft and at least one fixed optical system including a coherent light source emitting a beam interfering with the angle coder of the support disc in order to code its angular position, a collimator of the said beam before interference and a photo detector of the modulated beam after interference. In one embodiment, two optical systems arranged 90&#xb0; from each other are employed. An alternative embodiment includes one optical system and the disc includes a circular track radially centred in at least one of its angular positions relative to the incident collimated light beam, and a radially orientated photo detector.

Out-of-round coder

Optical rotation counter associated with a rotary disc of an angle sensor provided with means for coding the angular position of the disc, including at least one fixed source of coherent light emitting a light beam, a diaphragm and a support moved by the rotation of the coding disc. On its face facing the incident beam, the support includes at least one cell for coding its displacement orientated in the direction of the said displacement and generates an optical code by interference with the incident light beam, the said optical code being readable after interference on at least one photodetector.

Optical rotation counter

Device for detection of out-of-round on an angle sensor including a disc supporting angle coding means rigidly attached to a rotating shaft and at least one fixed optical system including a coherent light source emitting a beam interfering with the angle coding means of the support disc in order to code its angular position, means for collimation of the said beam before interference and a photodetector of the modulated beam after interference. In accordance with one possibility, it includes two optical systems arranged 90&#xb0; from each other. Alternatively, there is only one optical system and the disc includes a circular track radially centered in at least one of its angular positions relative to the incident collimated light beam, and a radially orientated photodetector.

A method for determining the position of one of two components in relative motion with respect to each other, using optical means, comprises:

Method for determining the position of a first moving component relatively to a second component and device for applying said method

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Biard, France

Olivier R Marroux