Samba Sensors Ab

Fiso Technologies Inc.

Nevio Vidovic

Svante Höjer

Martin Krantz

Thorleif Josefsson

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

Compensation is provided for bending of an optical fibre in intensity-based optical measuring systems. A measuring signal and a reference signal of different wavelengths are generated and transmitted through an optical connection towards a sensor element. The reference signal is not influenced in the sensor element. The measuring and reference signals are detected and compensation is carried out for bending of the optical connection using correction data. The correction data is based upon pre-store data concerning the relationship between the measured reference signal and the measured measuring signal as a function of the bending influence on the optical connection. Devices and methods according to the invention allow for measurements with an optical pressure measuring system that exhibit effective compensation for any bending of the optical connection.

Method and a device for bending compensation in intensity-based fibre-optical measuring systems

Method and device for fiber-optical measuring systems

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Kållered, Sweden

Nevio Vidovic