Inphotech Spolka Z Ograniczona Odpowiedzialnoscia

Inphotech Sp. Z O.o.

Alejandro Dominguez-Lopez

Tomasz Nasilowski

Marek Napierala

Jakub Kaczorowski

Lukasz Szostkiewicz

Krzystof Markiewicz

Krzysztof Markiewicz

Lukasz Szostkiewcz

Mariusz Biela

Piotr Plaszczykowski

A temperature monitoring device containing a control system adapted to generate substantially periodic control waveforms applied to the control input of the light source with tunable wavelength connected to an optical fiber interferometer, in which a measuring optical fiber is connected in one its arms, and the interferometer output is connected to a detector whose output is connected to a signal processing module adapted to identify temperature changes in the optical fiber length function, in accordance with the invention, characterized in that the light source coherence length is longer than 0.5 m, and the period of the periodic waveform is shorter than or equal to 20 s, the difference between the minimum and maximum wavelength is higher than 3 pm, and the optical fiber is adapted to its placement near exoenergetic devices in a vehicle, during its operation. The temperature monitoring method according to the invention is characterized in that the temperature is determined by cumulatively accounting for changes detected using the device according to the invention at measurement points on the measuring optical fiber of this device. The temperature monitoring system according to the invention is characterized in that the measuring optical fiber of the device according to the invention is placed near exoenergetic devices in a vehicle.

Temperature monitoring device, temperature monitoring method, and temperature monitoring system

Optical fibre based measurement system having a system for generating radiation (Z) with monotonically tuneable wavelength during sweep periods, an optical path (T) and a detector (D) connected to the system for generating radiation (Z) via the optical path (T). The optical path (T) comprises the interferometer (I) comprising the multi-port element (EW) and the attached measuring optical fibre (F) sensitive to at least two environmental parameters, the mode excitation system (P) adapted for excitation in the measuring optical fibre (F) of at least the measuring mode (Mn1) with the first effective refractive index and the measuring mode (Mn2) with the second effective refractive index, having different sensitivity to these two parameters. The measurement system comprises the processing unit (UP) to which the detector (D) is connected via the analogue-to-digital converter (ADC), and the processing unit (UP) is adapted to generate the control signal for the system for generating radiation (Z). The object of the invention is also the method of measuring at least two parameters, and the computer program product.

Optical fibre based measurement method of measuring parameters, and computer program product

A fibre-optic measurement system equipped with a controlled light generation system () and a receiving system () connected via an optical path which comprises a directional device () and which, in addition, has a processing unit () for controlling the light generation system () and for receiving and processing the signal from the receiving system (), according to the invention, it is characterized by the fact that it has a selective mode device () and is adapted to be connected to a fibre-optic telecommunications network by a selective mode device () and the processing unit () is adapted to implement the OFDR and/or COTDR measurement technique for measuring changes in the optical distance and processing them into one or more parameters. Moreover, the object of the invention is also the method of adaptation of a telecommunications network into a sensor network and a fibre-optic measurement and communication system.

Fibre-optic measurement system, method of adaptation of the communication optical fibre into a measurement system, and fibre-optic measurement and communication system

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Granada, Spain

Alejandro Dominguez-Lopez