CONTACT SENSITIVE DEVICE
First Claim
Patent Images
1. A method of determining information relating to a contact on a contact sensitive device comprising:
- providing a member capable of supporting bending waves and a plurality of sensors for measuring bending wave vibration in the member;
measuring a bending wave signal using each of the sensors in response to a contact being applied to the member at a location;
determining a phase angle for each measured bending wave signal;
calculating a phase difference between the phase angles of at least two pairs of sensors; and
determining the location of the contact utilizing the at least two calculated phase differences.
1 Assignment
0 Petitions
Accused Products
Abstract
A contact sensitive device includes a member capable of supporting bending waves and a plurality of sensors mounted on the member for measuring bending wave vibration in the member. The sensors measure the bending wave signals and by calculating a phase angle for each measured bending wave signal and a phase difference between the phase angles of at least two pairs of sensors so that at least two phase differences are calculated, the location of the contact can be determined.
-
Citations
14 Claims
-
1. A method of determining information relating to a contact on a contact sensitive device comprising:
-
providing a member capable of supporting bending waves and a plurality of sensors for measuring bending wave vibration in the member;
measuring a bending wave signal using each of the sensors in response to a contact being applied to the member at a location;
determining a phase angle for each measured bending wave signal;
calculating a phase difference between the phase angles of at least two pairs of sensors; and
determining the location of the contact utilizing the at least two calculated phase differences. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method for determining a location of a contact on a member capable of supporting bending waves, the member having a plurality of sensors for measuring bending wave vibration in the member, the method comprising:
-
measuring bending wave signals at respective sensors in response to the contact being applied to the member at the location;
determining the location of the contact using at least one path-length difference for each sensor pair of at least two sensor pairs, the at least one path-length difference of each sensor pair being determined according to a phase angle difference of the bending wave signals measured respective sensors of the sensor pair. - View Dependent Claims (12, 13, 14)
-
Specification