Device for determining the position of a signal source
The invention relates to a device for determining the position of a signal source configured to emit signals modulated by a modulation frequency, comprising: a conductor arranged in such a way that it receives the modulated signals at various positions along the conductor and configured to conduct the modulated signal, respectively in opposite directions, to a first conductor end and to a second conductor end when a modulated signal is received; a detector configured to acquire the modulated signal at the first conductor end and at the second conductor end; and a determination apparatus configured to: determine a phase difference between the modulated signal acquired at the first conductor end and the modulated signal acquired at the second conductor end, and determine the position of the signal source in relation to the conductor on the basis of the phase difference.
1 . Device for determining the position of a signal source ( 1 ) configured to emit signals modulated by a modulation frequency, comprising;
a conductor ( 3 ) arranged in such a way that it receives the modulated signals at various positions along the conductor and configured to conduct the modulated signal, respectively in opposite directions, to a first conductor end ( 5 ) and to a second conductor end ( 5 ) when a modulated signal is received,
a detector ( 7 ) configured to acquire the modulated signal at the first conductor end and at the second conductor end, and
a determination apparatus ( 9 ) configured to:
determine a phase difference between the modulated signal acquired at the first conductor end and the modulated signal acquired at the second conductor end, and
determine the position of the signal source in relation to the conductor on the basis of the phase difference.
2 . Device according to claim 1 , wherein the determination apparatus ( 9 ) is furthermore configured to:
determine a travel time of the modulated signal acquired at the first conductor end ( 5 ) as a first travel time and a travel time of the modulated signal acquired at the second conductor end ( 5 ) as a second travel time on the basis of the phase difference,
determine a ratio of the first travel time to the second travel time, and
determine the position of the signal source ( 1 ) on the basis of the ratio of the first travel time to the second travel time.
3 . Device for determining the position of a signal source ( 1 ) configured to emit a signal modulated by a modulation frequency, which can be coupled into a conductor ( 3 ) at different positions and is conducted along the conductor ( 3 ) in opposite directions, wherein the device is configured to:
determine a phase difference between a modulated signal acquired at a first end ( 5 ) of a conductor ( 3 ) and a modulated signal acquired at a second end ( 5 ) of the conductor, and
determine the position of the signal source in relation to the conductor on the basis of the phase difference.
4 . Device according to claim 3 , wherein the device is furthermore configured to:
determine a travel time of the modulated signal acquired at the first conductor end ( 5 ) as a first travel time and a travel time of the modulated signal acquired at the second conductor end ( 5 ) as a second travel time on the basis of the phase difference,
determine a ratio of the first travel time to the second travel time, and
determine the position of the signal source ( 1 ) on the basis of the ratio of the first travel time to the second travel time.
5 . Device according to claim 1 , wherein the signal source ( 1 ) and the conductor ( 3 ) are configured to be movable relative to one another.
6 . Device according to claim 1 , wherein the conductor ( 3 ) is embodied in a ring shape.
7 . Device according to claim 1 , wherein the conductor ( 3 ) is formed from at least one conductor section.
8 . Device according to claim 1 , wherein the signals emitted by the signal source ( 1 ) are optical signals and the conductor ( 3 ) is a fluorescing optical fibre.
9 . Device according to claim 1 , wherein the signal emitted by the signal source ( 1 ) are electrical signals and the conductor ( 3 ) is an electrically conductive conductor.
10 . Device according to claim 1 , wherein the signals emitted by the signal source ( 1 ) are acoustic signals and the conductor ( 3 ) is an acoustic conductor.
11 . Instrument ( 15 ) for transmitting data between two parts rotating relative to one another about a common axis, comprising a device according to one of claims 8 to 10 , wherein the signal source ( 1 ) is arranged on one part and the conductor ( 3 ) is arranged about the rotational axis on the other part.
12 . Instrument ( 15 ) according to claim 11 , wherein the instrument is a computed tomography scanner.
13 . Instrument ( 15 ) according to claim 11 , wherein the instrument is a radar instrument.
14 . Device according to claim 2 , wherein the signal source ( 1 ) and the conductor ( 3 ) are configured to be movable relative to one another.
15 . Device according to claim 2 , wherein the conductor ( 3 ) is embodied in a ring shape.
16 . Device according to claim 2 , wherein the conductor ( 3 ) is formed from at least one conductor section.
17 . Device according to claim 2 , wherein the signs emitted by the signal source ( 1 ) are optical signals and the conductor ( 3 ) is a fluorescing optical fibre.
18 . Device according to claim 2 , wherein the signal emitted by the signal source ( 1 ) are electrical signals and the conductor ( 3 ) is an electrically conductive conductor.
19 . Device according to claim 2 , wherein the signals emitted by the signal source ( 1 ) are acoustic signals and the conductor ( 3 ) is an acoustic conductor.
20 . Device according to claim 3 , wherein the signal source ( 1 ) and the conductor ( 3 ) are configured to be movable relative to one another.