Patent ID: 7595634
Filing Date: 2009-09-29
Classification: B60Q,G01D

Abstract:
1. A method of determining an instantaneous angular position of a headlight, in particular for a motor vehicle, that is mounted so as to pivot about a pivot axis in a predetermined range of movement delimited by two extreme angular positions, by means of a measuring device that comprises: at least one ferromagnetic element that emits a magnetic field that is defined at any point in space by a direction and an intensity, at least one first measurement means of measuring an intensity of a magnetic field along a first axis that emit a first electrical measurement signal, said at least one ferromagnetic element being mounted so as to pivot with respect to said at least one first measurement means about said pivot axis between two extreme angular positions corresponding respectively to extreme angular positions of the headlight; an electronic processing unit; said method comprising a step of measuring the intensity of said magnetic field along said first axis, and a second processing step during which the electronic processing unit calculates an angular position of the headlight from the value of said first electrical measurement signal, wherein during the measurement step, the intensity of said magnetic field is measured along at least a second axis orthogonal to said first axis by at least one second measurement means that emits a second electrical measurement signal, and in that, during said second processing step, said electronic processing unit calculates a value representing an angle of said magnetic field with respect to said first axis and said at least a second axis.