Contact sensitive device
First Claim
Patent Images
1. A contact sensitive device comprising:
- a member capable of supporting bending waves;
a plurality of sensors mounted on the member for measuring bending wave vibration in the member, wherein each of the sensors determines a measured bending wave signal; and
a processor responsive to the measured bending wave signals to calculate a location of a contact on the member;
the processor calculating a phase angle for each measured bending wave signal and a phase difference between the phase angles of least two pairs of sensors so that at least two phase differences are calculated from which the location of the contact is determined.
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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 least two pairs of sensors so that at least two phase differences are calculated, the location of the contact can be determined.
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Citations
39 Claims
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1. A contact sensitive device comprising:
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a member capable of supporting bending waves;
a plurality of sensors mounted on the member for measuring bending wave vibration in the member, wherein each of the sensors determines a measured bending wave signal; and
a processor responsive to the measured bending wave signals to calculate a location of a contact on the member;
the processor calculating a phase angle for each measured bending wave signal and a phase difference between the phase angles of least two pairs of sensors so that at least two phase differences are calculated from which the location of the contact is determined. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A method of determining information relating to a contact on a contact sensitive device comprising:
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providing a member capable of supporting bending waves and a plurality of sensors mounted on the member for measuring bending wave vibration in the member;
applying a contact to the member at a location, using each of the sensors to determine a measured bending wave signal; and
calculating the location of a contact from the measured bending wave signals by calculating 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 from the at least two calculated phase differences. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A contact sensitive device comprising:
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a member capable of supporting bending waves;
a plurality of sensors mounted on the member for measuring bending wave vibration in the member; and
means for calculating the location of a contact from the measured bending wave signal by calculating 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 from the at least two calculated phase differences.
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Specification