Method and device for positioning an emitter
A method for positioning an emitter relative to a detector includes determining the position of the detector relative to the emitter, changing the position of the detector and measuring the change in position using a measuring device located in the detector. Data related to the change in position of the detector is then supplied to a device for positioning the emitter, and the position of the emitter is changed in accordance with the data. An image capture device is also provided.
1. A method for positioning an emitter relative to a detector, the method comprising the following steps:
determining a position of the detector relative to the emitter by using at least one marker mounted on the detector and by using at least one camera mounted on the emitter, for detecting the at least one marker;
changing the position of the detector and measuring a change in position of the detector by using a measuring device disposed in the detector;
supplying data, relating to the change in position of the detector, to a device for positioning the emitter;
changing the position of the emitter in accordance with the data;
determining a change in position of the detector using the at least one camera mounted on the emitter when the at least one camera is in visual contact with said at least one marker and is able to measure the change of position of the detector, otherwise,
determining the change in position of the detector using the measuring device disposed in the detector when the at least one camera mounted on the emitter loses visual contact with said at least one marker and does not supply any measured results for the change in position of the detector.
2. The method according to claim 1 , which further comprises:
monitoring the measurement of the change in position of the detector using the at least one camera mounted on the emitter; and
automatically switching to measurement of the change in position by the measuring device disposed in the detector, or to measured results obtained by the measuring device, when the at least one camera mounted on the emitter provides no measured results for the change in position of the detector.
3. The method according to claim 1 , which further comprises determining an orientation of the detector in addition to the relative position of the detector.
4. The method according to claim 1 , which further comprises measuring a change in an orientation of the detector by using the measuring device disposed in the detector, when the position of the detector is changed.
5. The method according to claim 1 , which further comprises predefining a desired distance between the emitter and the detector, and changing the position of the emitter in accordance with the data to cause the distance between the emitter and the detector to correspond to the desired distance.
6. The method according to claim 1 , which further comprises finely adjusting at least one of a distance or an orientation between the emitter and the detector after changing the position of the emitter by using the at least one marker mounted on the detector and by using the at least one camera mounted on the emitter for detecting the at least one marker.
7. The method according to claim 3 , which further comprises, before changing the position of the detector, adapting the orientation of the detector in accordance with a deviation of the orientation from a desired orientation.
8. The method according to claim 4 , wherein said measuring device disposed in the detector includes at least one of a gyroscope, an acceleration sensor, a compass or a combination of a gyroscope, an acceleration sensor and a compass for measuring the change in position or the change in orientation.
9. The method according to claim 4 , which further comprises transmitting data relating to the change in position or change in orientation of the detector, from a transmitter mounted on the detector to a control system of the device for positioning the emitter.
10. An image capture device for positioning an emitter relative to a detector, the image capture device comprising:
an emitter;
a detector;
said emitter positionable relative to said detector by an apparatus including:
at least one camera mounted on said emitter and configured to visually detect at least one marker mounted on said detector and determine a change in position of said detector;
a first drive configured to change the position of said detector,
a position sensor arranged in said detector and configured to measure the change in position of said detector, the change in position of said detector measured by said position sensor being used to determine a change in the position of said detector when said at least one camera mounted on said emitter loses visual contact with said at least one marker and does not supply any measured results for the change in position of said detector,
a transmitter for supplying data relating to the change in position of said detector to a second drive configured to change the position of said emitter, and
said second drive configured to change the position of said emitter in accordance with the data supplied by said transmitter.
11. The image capture device according to claim 10 , wherein said detector contains an extendable element including said at least one marker to be detected by said at least one camera of said emitter.