Method for distance measurement between moving objects
First Claim
1. A method for the correction of an influence to a distance measurement between at least two objects on a basis of phase angle information of transmitted signals between said at least two objects, wherein said influence is a change in the phase angles of the signals due to a relative movement between said at least two objects said method comprising steps of:
- providing at least one emission and reception component in each of the at least two objects;
providing at least one measurement component for determining phase angles of first and second signals at least at the first object;
emitting only one signal from each of said at least one emission and reception component of each of said at least two objects at any given time;
wherein the emissions of each emission and reception component are performed with interposed time intervals therebetween and wherein each of the following steps a-e is performed at least two times;
a) emission of a first signal from a first emission and reception component of a first object of the said at least two objects;
b) reception of said first signal at a second emission and reception component of a second object of said at least two objects;
c) emission of a second signal from said second emission and reception component of the second object; and
d) reception of said second signal at said first emission and reception component of the first object;
e) measuring phase angles of the first and second signals with the at least one measurement component;
providing at least one computing unit programmed to calculate changes in measured phase angles;
receiving, in said at least one computing unit, said measured phase angles from said measurement component;
calculating a change between the measured phase angles using the at least one computing unit;
determining the distance between the two objects using the at least one computing unit, wherein the distance change calculated from the change of phase using the at least one computing unit or the change of phase shift due to the distance change between said objects between the transmissions is taken into consideration in the determination of the distance between at least two objects.
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Accused Products
Abstract
A method, device, system and use for determining a distance, location and/or orientation including the at least relative determination of a position of at least one object using at least two active anchors. A first signal is emitted by a first of the two anchors and is received at the object and by a second of said two anchors. A phase measurement is performed at said second anchor and wherein a distance determination with respect to said first anchor is performed and/or the distance from said first anchor to said second anchor is known. A second, particularly electromagnetic, signal is emitted from said second anchor, and information on phase measurement and distance between said first and second anchors is made available to a computation unit and at least one phase measurement respectively of said first and second signal is performed at said object and made available to said computation unit.
29 Citations
24 Claims
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1. A method for the correction of an influence to a distance measurement between at least two objects on a basis of phase angle information of transmitted signals between said at least two objects, wherein said influence is a change in the phase angles of the signals due to a relative movement between said at least two objects said method comprising steps of:
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providing at least one emission and reception component in each of the at least two objects; providing at least one measurement component for determining phase angles of first and second signals at least at the first object; emitting only one signal from each of said at least one emission and reception component of each of said at least two objects at any given time; wherein the emissions of each emission and reception component are performed with interposed time intervals therebetween and wherein each of the following steps a-e is performed at least two times; a) emission of a first signal from a first emission and reception component of a first object of the said at least two objects; b) reception of said first signal at a second emission and reception component of a second object of said at least two objects; c) emission of a second signal from said second emission and reception component of the second object; and d) reception of said second signal at said first emission and reception component of the first object; e) measuring phase angles of the first and second signals with the at least one measurement component; providing at least one computing unit programmed to calculate changes in measured phase angles; receiving, in said at least one computing unit, said measured phase angles from said measurement component; calculating a change between the measured phase angles using the at least one computing unit; determining the distance between the two objects using the at least one computing unit, wherein the distance change calculated from the change of phase using the at least one computing unit or the change of phase shift due to the distance change between said objects between the transmissions is taken into consideration in the determination of the distance between at least two objects. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22, 23, 24)
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20. The method as defined in 1, wherein the following method steps are performed at least two times:
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a. emitting said first signal with a first frequency from a first object of said at least two objects; b. receiving said first signal at a second of said at least two objects; c. emitting said second signal with a second frequency from said second object; d. receiving said second signal at said first object; e. measuring a frequency difference between the first and second frequencies with said at least one measurement component and providing the result to said at least one computing unit; f. calculating a first phase difference between said first signal at said first object and said second signal at said first object with said at least one computing unit; g. calculating a second phase difference between the first signal at said second object and the second signal at said second object with said at least one computing unit; and determining the distance between the first object and the second object with the at least one computing unit using the calculated phase and frequency differences.
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Specification