Abstract:
An optical sensor for detecting hydrogen in a fluid in physical contact with the sensor is provided. The sensor comprises an optical fiber, wherein an end portion of the optical fiber is coated with a multilayer comprising: a sensing layer, comprising a film of an alloy, the alloy comprising Mg, Ni, and M, wherein M is at least one of Zr, Ta, and Hf, and wherein the alloy has the composition Mg x Ni y M z , and wherein x is from 40 to 60, y is from 10 to 40, and z is from 10 to 40, and a catalyst layer comprising Pd. Further, a detection system for hydrogen, comprising such an optical sensor, and an electrical device having such a detection system are provided.
Abstract translation:提供了一种用于在与所述传感器物理接触的流体检测氢的光学传感器。 光纤,worin在光纤的端部的所述传感器包括被涂覆有多层,包括:感测层,其包括合金的膜,该合金包含Mg,Ni和男,worin M是中的至少一个 的Zr,Ta和Hf和worin该合金具有的Mg X的Ni Y M z中的组合物,和worin x是40至60,y为10至40,z是10至40,和催化剂层,其包括 钯。 另外,在审查的检测系统被设置在电子装置为氢的检测系统,包括寻求光学传感器,和。
Abstract:
A sensor (100) to measure a liquid (120), such as an urea solution. The sensor (100) includes a light source (132) operably coupled to a lumen (136) disposed in a liquid solution (120), the light source (132) configured to emit light and communicate the light to the lumen (136); a light detector (134) operably coupled to the lumen (136), the light detector (134) configured to receive at least a portion of the light from the lumen (136); and a controller (140) configured to determine a concentration or quality of the liquid solution (120) based on the light emitted by the light source (132) and the portion of light received by the light detector (134).
Abstract:
An optical sensor for detecting hydrogen in a fluid in physical contact with the sensor is provided. The sensor comprises an optical fiber, wherein an end portion of the optical fiber is coated with a multilayer comprising: a sensing layer, comprising a film of an alloy, the alloy comprising Mg, Ni, and M, wherein M is at least one of Zr, Ta, and Hf, and wherein the alloy has the composition Mg x Ni y M z , and wherein x is from 40 to 60, y is from 10 to 40, and z is from 10 to 40, and a catalyst layer comprising Pd. Further, a detection system for hydrogen, comprising such an optical sensor, and an electrical device having such a detection system are provided.
Abstract:
The invention relates to a device (100) for detecting and/or dosing hydrogen intended for monitoring an installation (1). Said device (100) comprises a first measurement optical fibre (10) intended to equip the installation (1), and an optical system (20) linked optically to the first measurement optical fibre (10) and adapted for measuring the variation of at least one parameter of the first measurement optical fibre (10). The optical system (20) is adapted for performing the measurement of the parameter along the first optical fibre (10) according to the measurement principle of the Brillouin type. The invention also relates to a method of implementing such a device (100).
Abstract:
The invention relates to a fibre sensor that enables the propagation of infrared light at at least one wavelength of 0.8 to 25 micrometres, the fibre successively comprising along its length a first infrared waveguide section (23), a second detection section (25) intended to come into contact with an external environment in order to detect infrared signatures interfering with the propagation of the evanescent waves propagating along the fibre (2), and a third infrared waveguide section (27). The invention is characterized in that, in the second fibre section (25) that has the detection role, the fibre (2) is constituted of a curved part, the radius of curvature of which is locally less than 2.3 millimetres.
Abstract:
Apparatus and a method for monitoring various conditions of a vehicle structure including an optical sensor comprising an optical fiber bearing a photonic crystal mounted to one end, an interrogation system including an optical signal generator interfacing with one or more of the optical sensors located remotely from the interrogation module, and a method of monitoring the vehicle structural health using the interrogation system.
Abstract:
An optical waveguide (1) has a grating structure (2) in which gratings of different orders are superimposed. When first and second order gratings are superimposed, input light is partially reflected by the first order component and partially coupled out of the waveguide by the second order component. The second order component can also be used to couple external light into the waveguide (1). The grating structure (2) has applications to free space couplers, optical sensors, and suppression of ripples in dispersion compensators.