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公开(公告)号：US09297691B2
公开(公告)日：2016-03-29
申请号：US14076502
申请日：2013-11-11
申请人： Gangbing Song , Siu Chun Michael Ho , Ren Liang , Hongnan Li
发明人： Gangbing Song , Siu Chun Michael Ho , Ren Liang , Hongnan Li
CPC分类号： G01H9/004 , G01D5/35316
摘要： A fiber Bragg grating (FBG) interrogation method allows for high frequency dynamic measurement. The method may utilize a broad band light source connected to the sensing elements. Each sensing element may comprise two wavelength matching FBGs, a coupler, and a photodiode. The FBG closest to the light source may attenuate the central wavelength in the transmission spectrum and thus the reflection spectrum of the second FBG. Variations in intensity of the second FBG may be measured by the photodiode and can be calibrated to the desired measurands.
摘要翻译： 光纤布拉格光栅（FBG）询问方法允许高频动态测量。 该方法可以利用连接到感测元件的宽带光源。 每个感测元件可以包括两个波长匹配FBG，耦合器和光电二极管。 最靠近光源的FBG可以衰减透射光谱中的中心波长，从而衰减第二FBG的反射光谱。 可以通过光电二极管测量第二FBG的强度变化，并且可以校准到所需的被测量。
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公开(公告)号：US20140131562A1
公开(公告)日：2014-05-15
申请号：US14076502
申请日：2013-11-11
申请人： Gangbing Song , Siu Chun Michael Ho , Ren Liang , Hongnan Li
发明人： Gangbing Song , Siu Chun Michael Ho , Ren Liang , Hongnan Li
IPC分类号： G01H9/00
CPC分类号： G01H9/004 , G01D5/35316
摘要： A fiber Bragg grating (FBG) interrogation method allows for high frequency dynamic measurement. The method may utilize a broad band light source connected to the sensing elements. Each sensing element may comprise two wavelength matching FBGs, a coupler, and a photodiode. The FBG closest to the light source may attenuate the central wavelength in the transmission spectrum and thus the reflection spectrum of the second FBG. Variations in intensity of the second FBG may be measured by the photodiode and can be calibrated to the desired measurands.
摘要翻译： 光纤布拉格光栅（FBG）询问方法允许高频动态测量。 该方法可以利用连接到感测元件的宽带光源。 每个感测元件可以包括两个波长匹配FBG，耦合器和光电二极管。 最靠近光源的FBG可以衰减透射光谱中的中心波长，从而衰减第二FBG的反射光谱。 可以通过光电二极管测量第二FBG的强度变化，并且可以校准到所需的被测量。
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公开(公告)号：US09222877B2
公开(公告)日：2015-12-29
申请号：US14054156
申请日：2013-10-15
申请人： Gangbing Song , Siu Chun Michael Ho , Ren Liang
发明人： Gangbing Song , Siu Chun Michael Ho , Ren Liang
CPC分类号： G01N21/17 , G01M3/047 , Y10T29/49117
摘要： A fiber Bragg grating (FBG) sensor for detecting moisture may include a sensor housing, FBG cable, water-swellable bead(s), and retaining mechanism. The housing secures the FBG cable and water-swellable bead. The retaining mechanism, such as one or more wire(s), placed adjacent to the FBG cable may be utilized to minimize lateral displacement of the water-swellable bead(s). The water-swellable bead(s) may swell as they absorb water, thereby causing the FBG to be strained to allow the detection of liquid moisture.
摘要翻译： 用于检测水分的光纤布拉格光栅（FBG）传感器可能包括传感器外壳，FBG电缆，水溶胀珠和保持机构。 外壳固定FBG电缆和水润湿珠。 放置在FBG电缆附近的一个或多个导线的保持机构可用于最小化水溶胀珠的横向位移。 水溶胀珠可以吸收水而膨胀，从而导致FBG变形以允许检测液体水分。
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公开(公告)号：US20140102190A1
公开(公告)日：2014-04-17
申请号：US14054156
申请日：2013-10-15
申请人： Gangbing Song , Siu Chun Michael Ho , Ren Liang
发明人： Gangbing Song , Siu Chun Michael Ho , Ren Liang
IPC分类号： G01N21/17
CPC分类号： G01N21/17 , G01M3/047 , Y10T29/49117
摘要： A fiber Bragg grating (FBG) sensor for detecting moisture may include a sensor housing, FBG cable, water-swellable bead(s), and retaining mechanism. The housing secures the FBG cable and water-swellable bead. The retaining mechanism, such as one or more wire(s), placed adjacent to the FBG cable may be utilized to minimize lateral displacement of the water-swellable bead(s). The water-swellable bead(s) may swell as they absorb water, thereby causing the FBG to be strained to allow the detection of liquid moisture.
摘要翻译： 用于检测水分的光纤布拉格光栅（FBG）传感器可能包括传感器外壳，FBG电缆，水溶胀珠和保持机构。 外壳固定FBG电缆和水润湿珠。 放置在FBG电缆附近的一个或多个导线的保持机构可用于最小化水溶胀珠的横向位移。 水溶胀珠可以吸收水而膨胀，从而导致FBG变形以允许检测液体水分。
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