FNV IP B.V.

A interference detection device performing the following actions: receiving individual position data from mobile terminals which individual position data indicates an area in which individual ones of the mobile terminals are located based on positioning signals received by the mobile terminals; identifying if individual position data may have been affected by one or more interfering signals transmitted by interfering device and interfering with the positioning signals; (A) identifying if a number of mobile terminals in a first area is higher than a maximum threshold number, and, if so, determining that individual position data of the number of mobile terminals may have been affected by the interfering signals; or (B) identifying if a number of the mobile terminals in a second area is lower than a minimum threshold number; and, if so, determining that individual position data of the number of mobile terminals may have been affected by interfering signals; or (C) receiving further individual position data which indicates further areas in which mobile terminals are located based on another positioning technique than a positioning technique used to determine the individual position data as received from the mobile terminals; determining if the areas overlap with the further areas at least to a minimum extent, and, if not, determining that individual position data of the mobile terminals may have been affected by the interfering signals.

A system for monitoring survey reflectors arranged at a plurality of locations on an object, having: a camera, including: one or more light sources arranged to illuminate a field in space corresponding to at least 10% of a field of view of the camera, preferably the whole field of view; an image sensor receiving light beams from reflections of the beam by the survey reflectors and providing data; a body with an optical entry system, the image sensor located on a first side and the light source on a second side of the body; and a processing unit processing the data. The processing unit is configured to determine locations of the survey reflectors from the image sensor data and detect movement of the survey reflectors based on a comparison of the determined locations with previously determined locations.

A track monitoring system (and a method thereof) for mounting to a vehicle on a track comprising at least one rail is provided. The track monitoring system comprises a position and attitude measurement unit configured to determine a geographical position and attitude of the system during at least one pass of the vehicle on the track, a storage medium for storing track geometry data, a laser imaging and/or scanning unit configured to determine a position of the at least one rail relative to the track monitoring system, and a position of the at least one rail and surroundings relative to the track monitoring system during the at least one pass, a processor configured to determine, in the at least one pass, a first geographically referenced rail position based on the geographical position and attitude of the rail monitoring system and the position of the at least one rail relative to the system, determine, in the at least one pass, a second geographically referenced rail position based on the geographical position and attitude of the rail monitoring system and the position of the at least one rail and surroundings relative to the rail monitoring system, determine a third geographically referenced rail position based on the first and the second geographically referenced rail positions, and corresponding geographically referenced track geometry data, acquire, in a further pass, track geometry data associated with each position of the rail relative to the rail monitoring system, and the output of the position and attitude measurement unit, update, based on the third geographically referenced position of the rail, the track geometry data acquired in the further pass, and store updated track geometry data to the storage medium.

A camera monitors positions on an external object having a beacon ( 1 ( i ), i= 1, 2 , . . . , I; 130; 430 ) attached to it. The apparatus has at least one image sensor ( 120; 321, 322; 420; 520 ), an imaging optical element ( 101 ) for projecting light on the image sensor ( 120 ), and a processing unit ( 9 ). The imaging optical element ( 101 ) may be non-refractive and receives a light beam ( 5 ( i ); 131 ) transmitted from the beacon ( 1 ( i ); 130; 430 ) and transfers the light beam ( 5 ( i ); 131 ) to the image sensor ( 120; 321, 322; 420; 520 ). The image sensor ( 120; 321, 322; 420; 520 ) forms image data based on the received light beam ( 5 ( i ); 131 ) and background light. The processing unit ( 9 ) processes the image data such that it filters image data components relating to the background light and renders image data components relating to the light beam.

A method and apparatus for dissemination of a timescale signal (T2) from at least one server site to at least one client site is provided. The method comprises running, at each server site, a server Global Navigation Satellite System, GNSS, process ( 202 ( i )) configured to generate a server GNSS output raw data signal (R7(T2); R7(T2(i))) based at least on one or more first satellite signals; generating a precise orbits and clocks signal (C8(T2); C10(T2); T4(Tppp-T2); T9(Tppp-T2)) embedding said timescale signal (T2) based on all server GNSS output signals (T2(i); T7(T2(i))) and broadcasting said precise orbits and clocks signal (C8(T2); C10(T2); T4(Tppp-T2); T9(Tppp-T2)) via a telecom network ( 206 ); running, at each client site, a client Global Navigation Satellite System, GNSS, process ( 201 ( c )) configured to generate a client GNSS output raw data signal (R5(T1(c))) based on a client clock signal (T1(c)) and based on one or more second satellite signals, running a client Precise Point Positioning, PPP, process ( 203 ( c )) configured to receive said client GNSS output raw data signal (R5(T1(c))) and said precise orbits and clocks signal (C8(T2); C10(T2); T4(Tppp-T2); T9(Tppp-T2)) and to generate a difference signal (T1(c)-T2) between said client clock signal (T1(c)) and timescale signal (T2).

A system for monitoring survey reflectors arranged at a plurality of locations on an object, having: a camera, including: one or more light sources arranged to illuminate a field in space corresponding to at least 10% of a field of view of the camera, preferably the whole field of view; an image sensor receiving light beams from reflections of the beam by the survey reflectors and providing data; a body with an optical entry system, the image sensor located on a first side and the light source on a second side of the body; and a processing unit processing the data. The processing unit is configured to determine locations of the survey reflectors from the image sensor data and detect movement of the survey reflectors based on a comparison of the determined locations with previously determined locations.

A interference detection device ( 22 ) perform the following actions: receiving individual position data from mobile terminals ( 4 ( j )) which individual position data indicates an area ( 12 ( j )) in which individual ones of the mobile terminals ( 4 ( j )) are located based on positioning signals received by the mobile terminals ( 4 ( j )); identifying if individual position data may have been affected by one or more interfering signals transmitted by interfering device ( 14 ( m )) and interfering with the positioning signals; (A) identifying if a number of mobile terminals ( 4 v ( j )) in a first area ( 18 ) is higher than a maximum threshold number, and, if so, determining that individual position data of the number of mobile terminals ( 4 v ( j )) may have been affected by the interfering signals; or (B) identifying if a number of the mobile terminals ( 4 ( j )) in a second area ( 36 ) is lower than a minimum threshold number; and, if so, determining that individual position data of the number of mobile terminals ( 4 ( j )) may have been affected by interfering signals; or (C) receiving further individual position data which indicates further areas ( 18 ) in which mobile terminals ( 4 ( j )) are located based on another positioning technique than a positioning technique used to determine the individual position data as received from the mobile terminals ( 4 ( j )); determining if the areas ( 12 ( j )) overlap with the further areas ( 18 ) at least to a minimum extent, and, if not, determining that individual position data of the mobile terminals ( 4 ( j )) may have been affected by the interfering signals.

Method for determining a spatial property of a submerged object in a 3D-space, using an underwater moveable platform, that is provided with a camera and with a position and orientation measurement system configured to output a position and orientation of the camera. The method includes receiving user input for visually fitting a bounding volume to the object, and determining the spatial property of the object based on a corresponding spatial property of a bounding volume once the user is satisfied that the bounding volume sufficiently fits the object. The method provides an interactive manner of visually fitting the bounding volume to the object, based on images of the object taken at different positions and/or orientations of the camera relative to the object, as well as on a representation of a position and orientation of the camera in the 3D space at the time each image was captured.

An apparatus monitors positions on an external object having at least one beacon ( 1 ( i ), i=1, 2, . . . , I) attached to it. The apparatus has an image sensor ( 11 ), a lens system ( 13 ) and a processing unit ( 9 ). The lens system ( 13 ) receives at least one light beam ( 5 ( i )) transmitted from the at least one beacon ( 1 ( i )) and transfer the at least one light beam ( 5 ( i )) to the image sensor ( 11 ). The image sensor ( 11 ) forms image data. The processing unit ( 9 ) identifies the at least one beacon ( 1 ( i )) within the image data based on the at least one light beam ( 5 ( i )), determines current location data of the at least one beacon ( 1 ( i )) based on the image data, compares the current location data with former location data of the one or more beacons ( 1 ( i )) as stored in a memory ( 15 ) and determines whether the object has moved relative to a fixed reference frame based on the comparison.

Method for determining a spatial property of a submerged object in a 3D-space, using an underwater moveable platform, that is provided with a camera and with a position and orientation measurement system configured to output a position and orientation of the camera. The method includes receiving user input for visually fitting a bounding volume to the object, and determining the spatial property of the object based on a corresponding spatial property of a bounding volume once the user is satisfied that the bounding volume sufficiently fits the object. The method provides an interactive manner of visually fitting the bounding volume to the object, based on images of the object taken at different positions and/or orientations of the camera relative to the object, as well as on a representation of a position and orientation of the camera in the 3D space at the time each image was captured.