G - Physics – 01 – D
Patent
G - Physics
01
D
G01D 5/241 (2006.01) G06F 3/033 (2006.01)
Patent
CA 2314176
A method of obtaining positional information utilising a device (10) comprising a first member (11) having at least two electrically isolated conducting parts (13-16), and a second electrically conducting member (12) adjacent to and capacitively coupled to the first member (11), the first and second members (11, 12) being relatively movable such that the proportions of the respective parts (13-16) of the first member (11) in overlapping relationship with the second member (12) may be varied, the method comprising the steps of providing a first square waveform signal (26) to one of the parts (13-16) of the first member (11) and a second square waveform signal (27) to the other of the parts (13-16) of the first member (11), analysing a signal arising in the capacitively coupled second member (12) to obtain a device output signal (50) containing information about the relative positions of the first and second members (11, 12).
La présente invention concerne un procédé d'obtention d'informations de position par l'utilisation d'un dispositif (10) constitué d'un premier élément (11) muni d'au moins deux conducteurs électriques isolés (13-16) et d'un second élément électriquement conducteur (12) adjacent et en couplage capacitif avec le premier. Ces deux éléments (11,12) sont relativement mobiles de manière à pouvoir faire varier les proportions des parties respectives (13-16) du premier élément (11) et du deuxième élément (12) qui se recouvrent. Le procédé consiste à fournir un premier signal d'onde carré (26) à l'une des parties (13-16) du premier élément (11) et un second signal d'onde carrée (27) à l'autre des parties (13-16) du premier élément (11), à analyser le signal apparaissant dans le second élément (12), en couplage capacitif, pour obtenir un signal de sortie (50) du dispositif qui contient des informations concernant les positions relatives des deux éléments (11,12).
Fetherstonhaugh & Co.
Woodfield David
LandOfFree
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