Abstract: A method for measuring the force generated by at least one athlete jumping on a measuring platform includes generating exercise data for jumping exercises. The exercise data is presented to the athlete. As the athlete performs jumping exercises on the measuring platform, a jumping force of the jumping exercises is measured and recorded as measurement data for the measured jumping force. The measurement data is sent to a data processing system that evaluates the measurement data and generates performance data from the measurement data. Expert data is determined from the performance data, and either the performance data or the expert data or both, are outputted to the athlete or to someone monitoring the performance of the athlete.

Abstract: A system is provided for capturing motion of a moving object via a plurality of motion sensor modules placed on various body segments. The sensor modules capture both 3D position and 3D orientation data relating to their respective body segments, thereby gathering motion data having six degrees of freedom with respect to a coordinate system not fixed to the body. Each body sensor collects 3D inertial sensor data and, optionally, magnetic field data. In embodiments, either DSP circuitry within the sensor modules or an external computing device, processes the sensor data to arrive at orientation and position estimates by using an estimation algorithm, such as a Kalman filter or a particle filter. The processing includes biomechanical model constraints that allow flexibility in the joints and provide characteristics for various joint types. To improve estimation accuracy, the system may be integrated with various types of aiding sensors.

Abstract: 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.

Abstract: A method is disclosed for measuring the motion of an object, composed of multiple segments connected by joints, via the estimation of the 3D orientation of the object segments relative to one another without dependence on a magnetic field as a reference for heading. The method includes first applying a plurality of inertial sensor units to the segments of the object, e.g., a user thigh, shank, foot, etc. Next an approximation of the distance between each inertial sensor unit and at least one adjacent joint is provided and the joint is subjected to an acceleration, e.g., as the user takes a step or two. The relative orientations of the segments are calculated and the orientations are used to form an estimation of the 3D orientation of the object segments relative to one another without using the local magnetic field as a reference for heading.

Abstract: The invention relates to motion tracking system (10) for tracking a movement of an object (P) in a three-dimensional space, the said object being composed of object portions having individual dimensions and mutual proportions and being sequentially interconnected by joints the system comprising orientation measurement units (S1, S3, . . .

Abstract: A motion tracking system for tracking an object composed of object parts in a three-dimensional space. The system comprises a number of magnetic field transmitters; a number of field receivers for receiving the magnetic fields of the field transmitters; a number of inertial measurement units for recording a linear acceleration; a number of angular velocity transducers for recording angular velocities. The system further comprises a processor for controlling the transmitters and receiving signals coming from the field receivers and the inertial measurement unit; which processor contains a module for deriving orientation and/or position information of the constituent object parts of the object on the basis of the received signals.

Abstract: A system is provided for capturing motion of a moving object via a plurality of motion sensor modules placed on various body segments. The sensor modules capture both 3D position and 3D orientation data relating to their respective body segments, thereby gathering motion data having six degrees of freedom with respect to a coordinate system not fixed to the body. Each body sensor collects 3D inertial sensor data and, optionally, magnetic field data. In embodiments, either DSP circuitry within the sensor modules or an external computing device, processes the sensor data to arrive at orientation and position estimates by using an estimation algorithm, such as a Kalman filter or a particle filter. The processing includes biomechanical model constraints that allow flexibility in the joints and provide characteristics for various joint types. To improve estimation accuracy, the system may be integrated with various types of aiding sensors.

Abstract: The invention relates to motion tracking system (10) for tracking a movement of an object (P) in a three-dimensional space, the said object being composed of object portions having individual dimensions and mutual proportions and being sequentially interconnected by joints the system comprising orientation measurement units (S1, S3, . . .