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公开(公告)号：KR1020120122612A
公开(公告)日：2012-11-07
申请号：KR1020110040874
申请日：2011-04-29
Applicant: 국방과학연구소
CPC classification number: G01K11/3206 , G01J3/0213 , G01K15/005 , G01L1/246 , G02B6/02052
Abstract: PURPOSE: An optical fiber sensor system based on a spectroscope is provided to perform a frequency measurement of lights reflected by an optical fiber bragg grating and frequency correction of an optical spectrometer at the same time and to measure a physical quantity of a structure at various spots more accurately. CONSTITUTION: An optical fiber sensor system based on a spectroscope comprises a light source(10), a beam isolator(11), an optical coupler(12), an optical filter(13), an optical spectrometer(15), an optical signal processing unit(16), and a plurality of optical fiber bragg grating. The light source provides lights having a wide frequency region with a single mode optical fiber cable. The beam isolator transmits the lights provided by the light source to a single direction through the single mode optical fiber cable and blocks the transmission of the lights to an opposite direction. The optical coupler divides input lights transmitted through the optical fiber cable into two or more output light or joins two or more input lights as one output optical signal. The optical filter receives one output light from the optical coupler and use an optical fiber ferrule and transmits lights of a specific frequency by a WDM(Wavelength Division Multiplexing) and reflect the lights of a different frequency. The optical spectrometer receives the lights of the specific frequency reflected by the optical fiber bragg grating existed on the single mode optical fiber cable and the lights including optical frequency grating signals being reflected by the optical filter, thereby measuring optical spectrums of the two lights at the same time. [Reference numerals] (10) Light source; (12) Optical coupler; (13) Optical filter; (14) Temperature controlling device(maintaining a constant temperature); (15) Optical spectrometer; (16) Optical signal processing unit; (AA) Measured optical spectrum; (BB) Noise-class optical frequency lattice signals by an optical filter; (CC) Add
Abstract translation: 目的：提供一种基于分光镜的光纤传感器系统，对光纤布拉格光栅反射的光进行频率测量，同时对光谱仪进行频率校正，并测量各种结点的物理量 更精确地。 构成：基于分光镜的光纤传感器系统包括光源（10），光束隔离器（11），光耦合器（12），滤光器（13），光谱仪（15），光信号 处理单元（16）和多个光纤布拉格光栅。 光源用单模光缆提供具有宽频率区域的灯。 光束隔离器通过单模光缆将光源提供的光传输到单个方向，并将光的传输阻挡在相反的方向。 光耦合器将通过光纤电缆传输的输入光分成两个或更多个输出光，或者将两个或更多个输入光连接为一个输出光信号。 光滤波器从光耦合器接收一个输出光，并使用光纤套圈，并通过WDM（波分复用）传输特定频率的光，并反射不同频率的光。 光谱仪接收由单模光缆存在的光纤布拉格光栅反射的特定频率的光，包括光频光栅信号的光被光滤波器反射，从而测量两个光的光谱 同时。 （附图标记）（10）光源; （12）光耦合器; （13）滤光片; （14）温度控制装置（保持恒温）; （15）光谱仪; （16）光信号处理单元; （AA）测量光谱; （BB）滤光器噪声级光频点阵信号; （CC）Add
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公开(公告)号：KR101247575B1
公开(公告)日：2013-03-26
申请号：KR1020110100484
申请日：2011-10-04
Applicant: 국방과학연구소
Abstract: PURPOSE: An optical spectrometer and a system for measuring a physical quantity of a structure using the same at a high speeds are provided to enable to measure the physical quantity of the structure at a high speed under a condition in which electromagnetic waves are generated, thereby measuring the vibration and the soundness of the structure on a real time basis. CONSTITUTION: A system for measuring a physical quantity of a structure using an optical spectrometer at high speeds comprises a broadband light source(100), a photo coupler(101), a fiber bragg gratings(120), a digital signal processing unit(140), and a signal control and detection system(170). The photo coupler makes lights emitted from the broadband light source incident into optical fibers where the optical fiber bragg gratings with different reflective wavelengths are connected and the lights reflected by the optical fiber bragg gratings with the different reflective wavelengths incident into an optical spectrometer(130). The optical fiber bragg gratings receive the broadband light source from the photo coupler and have different reflective wavelengths for measuring each physical quantity of a plurality of spots of the structure. The optical spectrometer measures the reflecting spectra of the optical fiber bragg gratings reflected by the photo coupler at high speeds. The digital signal processing unit generates the optical spectrum data of the lights reflected by the optical fiber bragg gratings having different reflective wavelengths. The signal control and detection system generates signal periodically to measure the optical spectra with the optical spectrometer. [Reference numerals] (100) Broadband light source; (101) Photo coupler; (120) Fiber bragg gratings(FBG); (130) Optical spectrometer; (131) Lights reflected from the fiber bragg gratings; (132) Light diffraction gratings; (133) Mirror; (134) Light receiving diode; (135) Light current/voltage converting amplifier; (136) Analog/digital signal converter; (140) Digital signal processing unit(FPGA); (170) Signal control and detection system; (AA) Light source
Abstract translation: 目的：提供一种光谱仪和用于以高速测量结构的物理量的系统，以便能够在产生电磁波的条件下高速地测量结构的物理量，由此 实时测量结构的振动和稳定性。 构成：使用高速光谱仪测量结构的物理量的系统包括宽带光源（100），光耦合器（101），光纤布拉格光栅（120），数字信号处理单元（140） ）和信号控制和检测系统（170）。 光耦合器使得从宽带光源发射的光入射到光纤中，其中具有不同反射波长的光纤布拉格光栅被连接，并且具有不同反射波长的光纤布拉格光栅反射的光入射到光谱仪（130）中， 。 光纤布拉格光栅从光耦合器接收宽带光源并且具有不同的反射波长，用于测量结构的多个点的每个物理量。 光谱仪测量由光耦合器高速反射的光纤布拉格光栅的反射光谱。 数字信号处理单元产生由具有不同反射波长的光纤布拉格光栅反射的光的光谱数据。 信号控制和检测系统周期性地产生信号，用光谱仪测量光谱。 （附图标记）（100）宽带光源; （101）光耦合器; （120）光纤布拉格光栅（FBG）; （130）光谱仪; （131）从光纤布拉格光栅反射的光; （132）光衍射光栅; （133）镜; （134）光接收二极管; （135）电流/电压转换放大器; （136）模拟/数字信号转换器; （140）数字信号处理单元（FPGA）; （170）信号控制和检测系统; （AA）光源
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公开(公告)号：KR101209627B1
公开(公告)日：2012-12-07
申请号：KR1020110040874
申请日：2011-04-29
Applicant: 국방과학연구소
Abstract: 본발명은분광기(광스펙트로미터)를기반으로하는광섬유센서시스템에관한것으로, 구조물의정확한물리량측정을위해광스펙트로미터의실시간파장교정기능을포함하며, 광원, 광 Isolator, 광커플러, 반사형광필터, 광필터의항온유지를위한온도조절장치, 광스펙트로미터, 광신호처리부그리고물리량측정을위해직렬로연결되어있는단일모드광섬유케이블에복수개의파장으로구성된복수개의광섬유브래그격자(FBG)를포함하여구성된다. 광스펙트로미터는광섬유브래그격자(FBG)에의해반사되는빛과광필에의해광주파수격자정보를포함하고있는빛의광스펙트럼을동시에측정하며, 반사형광필터에의해발생되는잡음크기의광주파수격자정보를포함하는광스펙트럼을이용하여광스펙트로미터에대해실시간적파장보정을실시한다. 파장보정을위해사용되는저반사율의반사형광필터는광필터에의해형성되는광주파수격자가 위치하는광주파수를알 수있으며광섬유페룰을이용하기때문에제작이용이하고제작비용이저렴한장점을지닌다.
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