Method for determining the position of an object relative to the background with ultrasound
First Claim
1. A method for determining a degree of coverage of an object relative to a background with ultrasound, comprising the steps of:
- emitting an ultrasound reference signal in a direction of the background where the reference signal is reflected;
storing an amplitude and an occurrence time of a maximum of the reflected reference signal;
emitting an ultrasound measurement signal in the direction of the object and of the background where the measurement signal is reflected;
if a maximum occurs in the reflected measurement signal at said occurrence time of the maximum of the reflected reference signal, storing the amplitude of the maximum of the reflected measurement signal; and
determining a first coverage degree from said amplitude of the maximum of the reflected reference signal and said amplitude of the maximum of the reflected measurement signal, said first coverage degree being a measure for the degree of coverage of the background by the object since the coverage of the background becomes greater the smaller is the amplitude of the maximum of the reflected measurement signal compared to the amplitude of the maximum of the reflected reference signal.
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Accused Products
Abstract
In a method for determining the position of an object relative to the background with ultrasound, a plurality of ultrasound transducers arranged in a row simultaneously transmit ultrasound in line-shaped fashion in the direction of an object scene and receive both the echo of the signal transmitted by the transducer itself as well as the echoes of the signals generated by the neighboring ultrasound transducers. On the basis of a reference measurement wherein no object is located in the measurement region, the amplitudes and the times of incidence of the echo signals are stored. In the following measurements with an object, the echo amplitudes and the times of incidence of the echo signals are again stored and compared by fuzzy logic to those of the reference measurement. As a result, this supplies the position of the object relative to the background.
22 Citations
14 Claims
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1. A method for determining a degree of coverage of an object relative to a background with ultrasound, comprising the steps of:
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emitting an ultrasound reference signal in a direction of the background where the reference signal is reflected; storing an amplitude and an occurrence time of a maximum of the reflected reference signal; emitting an ultrasound measurement signal in the direction of the object and of the background where the measurement signal is reflected; if a maximum occurs in the reflected measurement signal at said occurrence time of the maximum of the reflected reference signal, storing the amplitude of the maximum of the reflected measurement signal; and determining a first coverage degree from said amplitude of the maximum of the reflected reference signal and said amplitude of the maximum of the reflected measurement signal, said first coverage degree being a measure for the degree of coverage of the background by the object since the coverage of the background becomes greater the smaller is the amplitude of the maximum of the reflected measurement signal compared to the amplitude of the maximum of the reflected reference signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for determining a degree of coverage of an object relative to a background with ultrasound, comprising the steps of:
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emitting an ultrasound reference signal in a direction of the background where the reference signal is reflected; storing an amplitude and an occurrence time of a maximum of the reflected reference signal; emitting an ultrasound measurement signal in the direction of the object and of the background where the measurement signal is reflected; if a maximum occurs in the reflected measurement signal at said occurrence time of the maximum of the reflected reference signal, storing the amplitude of the maximum of the reflected measurement signal; and determining a first coverage degree from a comparison of said amplitude of the maximum of the reflected reference signal and said amplitude of the maximum of the reflected measurement signal, said first coverage degree being a measure, for a coverage of the background by the object.
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Specification