Abstract:
A method of characterizing a coated body by at least one coating parameter based on fitting to a physical model is provided. The coated body comprises a substrate coated by a polymeric coating such as a paint film, the polymeric coating having at least one layer. The method is carried out by a sensor system in a non-contact manner, the sensor system comprising an emitter system for emitting THz radiation, a detector system for detecting THz radiation, and a processing unit operationally coupled to the emitter system and the detector system. The method comprises : Emitting, by the emitter system, a THz radiation signal towards the coated body such that the THz radiation interacts with the polymeric coating; Detecting, by the detector system, a response signal being the detected THz radiation signal having interacted with the polymeric coating; Determining model parameters of the physical model by optimizing the model parameters such that a predicted response signal of the physical model is fitted to the detected response signal, the model parameters being indicative of optical properties of the polymeric coating describing the interaction of the THz radiation signal with the polymeric coating; Determining, from the determined model parameters, the at least one coating parameter, wherein the at least one coating parameter includes a thickness of the polymeric coating.
Abstract:
A method of characterizing a wet paint layer 4a of a painted body 2 by paint layer parameters based on fitting to a physical model is provided. The method is carried out by a sensor system 1 in a non-contact manner, the sensor system comprising an emitter system 10 for emitting THz radiation, a detector system 20 for detecting THz radiation, and a processing unit 30 operationally coupled to the emitter system 10 and the detector system 20. The method comprises: Emitting, by the emitter system 10, a THz radiation signal 60 towards the painted body 2 such that the THz radiation interacts with the wet paint layer 4a, the wet paint layer 4a having not yet finished a drying process during which the wet paint layer becomes a dry paint layer; Detecting, by the detector system 20, a response signal 74 being the detected THz radiation signal 70 having interacted with the wet paint layer 4a; Determining model parameters of the physical model by optimizing the model parameters such that a predicted response signal of the physical model is fitted to the detected response signal, wherein the model parameters are indicative of optical properties of the wet paint layer 4a describing the interaction of the THz radiation signal with the wet paint layer 4a; and Determining, from the determined model parameters, the paint layer parameters, wherein the paint layer parameters include a predicted dry layer thickness of the wet paint layer 4a.
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:
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:
A sensor system for characterizing a coating 4, such as a paint film, of a coated body 2 in a non-contact manner by use of THz radiation is provided. The sensor system comprises a THz system 1, a processing unit 30 and a positioning system 40. The THz system 1 comprises a light source 50 for generating a source light radiation; a flexible first radiation guide cable 51 for transmitting the source light radiation; a THz emitter 10 comprising a THz radiation generator 12 coupled to the light source 50 via the flexible first radiation guide cable 51 for receiving the source light radiation from the light source 50 and adapted for generating outgoing THz radiation 60 from the source light radiation, and a THz optical system 14 for directing the outgoing THz radiation towards the coated body 2; and a THz detector 20 for detecting incoming THz radiation 70 having interacted with the coating 4. The positioning system 40 comprises a movable unit 42 carrying the THz emitter 10 so that by moving the movable unit 42 the THz emitter 10 is positioned relative to the coated body 2. The light source 50 is arranged outside of the movable unit 42 so that when the movable unit 42 is moved, the THz emitter 10 is moved relative to the light source 50 while the THz emitter 10 keeps being coupled to light source 50 via the flexible first radiation guide cable 51. The processing unit 30 is operationally coupled to the THz detector 20 for receiving and processing a detected response signal representing the detected THz radiation.