| 摘要 |
<p>The invention concerns a method for measuring the relative angular position of an object (E) and an angular position measuring device (10) comprising at least a first and a second transducers (D1, D2) delimiting respectively a first and a second reception fields, the first and second reception fields overlapping in area defined as the field of view of the device (10), the method comprising the following steps:
a) carrying out an amplitude modulation of the signals delivered by the first and the second transducers (D1, D2); and
b) calculating an output signal (A) starting from the amplitude modulated signals (Ph1, Ph2) delivered by the first and the second transducers (D1, D2) as a function of said relative angular position,
characterized in that step a) is done by receiving radiation (M), whose intensity is modulated in time at a known frequency, from said object (E) with said transducers (D1, D2) within the field of view.</p> |
