Apparatus and method for position determination
First Claim
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1. An apparatus for determining a distance, the apparatus comprising:
- a converter element operable to generate an acoustic surface wave;
a surface operable to feed at least part of the acoustic surface wave to a reflection point; and
a processor configured to determine a distance between the apparatus and the reflection point from a propagation time of the acoustic surface wave,wherein the converter element is operable to register the acoustic surface wave reflected at the reflection point,wherein a position of the reflection point relative to an end of a surface having the reflection point is known, andwherein the processor is configured to calculate a position of the end from the distance between the apparatus and the reflection point and the position of the reflection point relative to the end.
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Abstract
An apparatus for determining a distance includes a converter element that generates n acoustic surface wave, a surface that feeds over at least part of the acoustic surface wave to a surface having a reflection point, and a processor that determines a distance between the apparatus and the reflection point from the propagation time of the acoustic surface wave. The converter element registers the acoustic surface wave reflected at the reflection point.
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Citations
17 Claims
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1. An apparatus for determining a distance, the apparatus comprising:
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a converter element operable to generate an acoustic surface wave; a surface operable to feed at least part of the acoustic surface wave to a reflection point; and a processor configured to determine a distance between the apparatus and the reflection point from a propagation time of the acoustic surface wave, wherein the converter element is operable to register the acoustic surface wave reflected at the reflection point, wherein a position of the reflection point relative to an end of a surface having the reflection point is known, and wherein the processor is configured to calculate a position of the end from the distance between the apparatus and the reflection point and the position of the reflection point relative to the end. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An apparatus for determining a distance, the apparatus comprising:
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a converter element operable to generate an acoustic surface wave; a surface operable to feed at least part of the acoustic surface wave to a reflection point; and a processor configured to determine a distance between the apparatus and the reflection point from a propagation time of the acoustic surface wave, wherein the converter element is operable to register the acoustic surface wave reflected at the reflection point, wherein the converter element is operable to transmit an additional acoustic surface wave along a path within the apparatus, and wherein the processor is configured to; determine a propagation time of the additional acoustic surface wave for the transmission; and determine the distance between the apparatus to the reflection point using the propagation time of the additional acoustic surface wave, a length of the path within the apparatus, and the propagation time of the acoustic surface wave.
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17. An apparatus for determining a distance, the apparatus comprising:
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a converter element operable to generate an acoustic surface wave; a surface operable to feed at least part of the acoustic surface wave to a reflection point; and a processor configured to determine a distance between the apparatus and the reflection point from a propagation time of the acoustic surface wave, wherein the converter element is operable to register the acoustic surface wave reflected at the reflection point, wherein the converter element is operable to register acoustic surface waves reflected at two different reflection points, and wherein the processor is configured to; determine a propagation speed of the acoustic surface waves from distances between the apparatus and the reflection points and two propagation times of the reflected acoustic surface waves; and use the propagation speed to determine a distance to another reflection point from a propagation time of another acoustic surface wave reflected at the another reflection point.
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Specification