Samba Sensors Ab

Qualisys Ab

Fiso Technologies Inc.

Thorleif Josefsson

Svante Höjer

Martin Krantz

Nevio Vidovic

Martin Kranz

The invention relates to a method for optical measuring systems, comprising a sensor element () connected to a measuring and control unit () via an optical connection (), and being adapted for providing a signal defining a measurement of a physical parameter (p) influencing the sensor element (), said method comprising generation of a measuring signal that is brought to come in towards the sensor element (), and detection of the intensity of the measuring signal (B) in the measuring and control unit (), after influencing the measuring signal in the sensor element (). The invention is characterised by comprising partial reflection of the measuring signal at a point along the optical connection (), at a predetermined distance from the sensor element (), detection of the intensity of the signal (A), corresponding to said partially reflected measuring signal, and determination of a measurement of said parameter (p) based upon the intensity of the partially reflected signal (A) and the intensity of the measuring signal (B). The invention also relates to a device for carrying out said method. Through the invention, measurements with an optical pressure measuring system are allowed, which exhibit effective compensation for any existing sources of error.

Method and device for fibre-optical measuring systems

Method and device for fiber-optical measuring systems

A motion analysis system for tracking the motion of one or more light-emitting markers attached to an object includes at least one camera for recording a series of image frames, and at least one light source in communication with said at least one camera for generating optical trigger signals. Each of the light-emitting markers includes a sensor for detecting the optical trigger signals generated by the at least one light source. Each light-emitting marker also includes one or more light-emitting elements for generating optical response signals after the sensor detects the optical trigger signals, the optical response signals having a first state and a second state being recordable by the camera as a series of image frames. The system also includes a detector for detecting the positions of the optical response signals in each recorded image frame, an arrangement mechanism for arranging the detected positions of the optical response signals in a sorted list, a processor for processing the sorted list and a generator for generating a unique identification code for each light-emitting marker based upon the optical response signals and the state of the response signals in the sorted list.

Motion analysis system

A method for determining a position of a body having at least one marker object with a known dimension parameter. The method utilizes at least one camera unit having a sensor device and an optical element a determinable distance from the sensor device. The at least one camera unit includes an element for retrieving and calculation. The method includes the steps of computing the coordinates of an image of the object reproduced on the sensor device, computing a dimension parameter of the object corresponding to the known dimension parameter of the at least one marker object and calculating the proportion of parameters obtained to determine the position of the object.

Method and arrangement for determining the position of an object

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Partille, Sweden

Thorleif Josefsson