XSENS HOLDING B.V.
|XSENS HOLDING B.V. Patent applications|
|Patent application number||Title||Published|
|20140081592||System and Method for Magnetic Field Data Compression - A technique for calculating magnetic field information from a magnetic sensor employs a sensing unit containing the magnetic sensor and another sensor capable of providing a measure of change in orientation. The method includes sampling a magnetic field at points in time and sampling the other sensor at each point in time. The method then entails rotating to a common time instant the magnetic field samples using the orientation of the sensing unit estimated by means of the other sensing modality in order to eliminate variations between magnetic samples due to changes in orientation of the sensor unit within such time interval. The magnetic samples, corrected for the sensor rotation in such interval, are used to calculate magnetic field related information specific to the given time interval and the magnetic field related information is communicated to a receiver at a rate lower than the sample rate.||03-20-2014|
|20120226468||REDUCTION OF IMU/AP LINK REQUIREMENTS FOR SDI - A method, controller and system in accordance with various aspects of the present disclosure facilitate reduced energy consumption in a motion sensing device having an inertial measurement unit (IMU), with a strap down integration unit, and an application processing unit (AP). The system and method include sensing acceleration values and rotational values at the IMU and converting the sensed acceleration and rotational values into velocity and orientation increments by strap down integration. The velocity and orientation increments are stored in a first buffer at the IMU between updates to the AP. When an update request is received at the IMU from the AP over an interrupt link, the buffer contents are transmitted over a serial link from the IMU to the AP.||09-06-2012|
|20120223846||COMPRESSION OF IMU DATA FOR TRANSMISSION OF AP - A method, controller and system in accordance with various aspects of the present disclosure facilitate reduced energy consumption in a motion sensing device having an inertial measurement unit (IMU), with a strap down integration unit, and an application processing unit (AP). The system and method include rounding velocity increments and orientation increments at the inertial measurement unit, thereby producing a remainder values. The remainder values are added to subsequent velocity increments and orientation increments prior to rounding of those values, and so on. In this way, while motion granularity is slightly decreased, there is no drift of integration errors over time.||09-06-2012|
|20110109438||Method and A System for Enabling A Wireless Communication Between A Master Unit and A Sensor Unit - A method of enabling a wireless communication between a master unit and at least one sensor unit is executed within a frame, the sensor unit having an internal data sampling frequency and being adapted to store samples with corresponding sample sequence numbers. The sensor unit transmits an integrated value to the master unit. The master unit transmits, during a master unit portion of the frame, a data update request message comprising an initial sample sequence number from which integration by the at least one sensor unit has to be carried out. The sensor unit integrates the sample values from the initial sample sequence number to a current sample sequence number and then transmits the integrated sample value and the current sample sequence number. The master unit receives the integrated sample value and current sample sequence number and stores at least the current sample sequence number.||05-12-2011|
|20110046915||USE OF POSITIONING AIDING SYSTEM FOR INERTIAL MOTION CAPTURE - The invention provides robust real-time motion capture, using an inertial motion capture system, aided with a positioning system, of multiple closely interacting actors and to position the actor exactly in space with respect to a pre-defined reference frame. It is a further object of the invention to use such positioning systems to aid the inertial motion capture system that the known advantages of using inertial motion capture technology is not compromised to a great extent. Such positioning systems include pressure sensors, UWB positioning systems and GPS or other GNSS systems. It is a further object of the invention to avoid the use of the earth magnetic field as a reference direction as much as possible, due to the known problems of distortion thereof.||02-24-2011|
Patent applications by XSENS HOLDING B.V.