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    • 82. 发明授权
    • Method and apparatus for distributed sensing utilizing optical scattering in optical waveguides
    • 在光波导中利用光散射的分布式感测的方法和装置
    • US08203707B2
    • 2012-06-19
    • US11938781
    • 2007-11-13
    • Wei Xu
    • Wei Xu
    • G01J3/44
    • G01F23/292G01D5/35358G01F23/22
    • The present invention relates to a method and apparatus for distributed sensing utilizing optical scattering in optical waveguides and reveals two types of the invention. One type of the invention is to characterize optical scattering while actively controlling the temperature of the optical waveguide. The other type of the invention is to characterize optical scattering while strain/stress is induced into the optical waveguide through interaction of the jackets or coatings of the optical waveguide with objects under test. In one embodiment of the invention, the optical scattering based method and apparatus can sense liquid level, liquid distribution, and temperature gradient on ground and in low gravity. Other embodiments of the invention can detect location and concentration of liquid spill and gas leak along pipelines, or measure liquid or gas flow rates. Moreover, the method and apparatus described in the invention have capabilities of sensing multiple physical and chemical parameters using one sensing optical waveguide.
    • 本发明涉及利用光波导中光散射的分布式感测方法和装置,揭示了本发明的两种类型。 本发明的一种类型是在主动地控制光波导的温度的同时表征光散射。 本发明的另一种类型是表征光学散射,同时通过光波导的外套或涂层与被测对象的相互作用将应变/应力引入到光波导中。 在本发明的一个实施例中,基于光散射的方法和装置可以感测地面和低重力的液面,液体分布和温度梯度。 本发明的其他实施例可以检测液体泄漏的位置和浓度以及沿管道的气体泄漏,或者测量液体或气体流速。 此外,本发明中描述的方法和装置具有使用一个感测光波导感测多个物理和化学参数的能力。
    • 87. 发明申请
    • Method And Apparatus For Inspecting Ceramic Wall Flow Filters
    • 陶瓷墙流量过滤器检测方法及装置
    • US20110048109A1
    • 2011-03-03
    • US12548057
    • 2009-08-26
    • Balram SumanSrinivasa Rao VaddirajuWei Xu
    • Balram SumanSrinivasa Rao VaddirajuWei Xu
    • G01N15/08G01M3/02
    • G01M3/38B01D46/2418B01D46/42G01N15/082G01N21/95692
    • Methods are disclosed for inspecting a cylindrical porous ceramic body by positioning a diffuser near, and spaced apart from, the first end of a ceramic body; flowing a tracer flow toward the diffuser, wherein a first portion of the tracer flow passes through the diffuser, and a second portion of the tracer flow does not pass through the diffuser, the first and second portions of the tracer flow then entering the first end of the ceramic body, wherein the average velocity of the first portion of the tracer flow entering the ceramic body VAVG1 is lower than the average velocity of the second portion of the tracer flow entering the ceramic body VAVG2; directing light toward the second end of the ceramic body; and detecting reflected light coming from a location proximate the second transverse face at the second end of the ceramic body.
    • 公开了用于通过将陶瓷体的第一端附近和间隔开设置扩散器来检查圆柱形多孔陶瓷体的方法; 使示踪剂流朝向扩散器流动,其中示踪剂流的第一部分通过扩散器,并且示踪剂流的第二部分不通过扩散器,示踪剂流的第一和第二部分然后进入第一端 其中进入陶瓷体VAVG1的示踪剂流的第一部分的平均速度低于进入陶瓷体VAVG2的示踪剂流的第二部分的平均速度; 将光引向陶瓷体的第二端; 以及检测来自陶瓷体的第二端处靠近第二横向面的位置的反射光。
    • 89. 发明授权
    • Accommodation belt for rolling element, and linear guide apparatus
    • 滚动元件用带,线性引导装置
    • US07736060B2
    • 2010-06-15
    • US11639246
    • 2006-12-15
    • Jun MatsumotoYoshinori MizumuraWei Xu
    • Jun MatsumotoYoshinori MizumuraWei Xu
    • F16C29/06
    • F16C29/0647F16C29/0609F16C33/3825F16C43/06
    • In a linear guide apparatus, a rolling-element accommodation belt 50 is incorporated into each of endless circulation passages. This rolling-element accommodation belt 50 is formed into a shape having ends and has a plurality of rolling-element accommodation sections for individually accommodating balls 46. Of the rolling-element accommodation sections, first rolling-element accommodation sections 55A located at the respective end sections are formed so as to constrain movement of a spacer section 59 located at the end section toward the outer periphery side of an endless circulation passage by means of the ball 46 accommodated in the spacer section. Second rolling-element accommodation sections 55B other than the first rolling-element accommodation sections are formed so as to enable removable accommodation of the balls 46 to be accommodated toward the inner periphery side of the endless circulation passage.
    • 在线性引导装置中,将滚动体容纳带50并入到各循环通路中。 该滚动体容纳带50形成为具有端部的形状,并且具有多个滚动体容纳部,用于分别容纳滚珠46.在滚动体容纳部中,位于各端的第一滚动体容纳部55A 形成为通过容纳在间隔部中的球体46来限制位于端部的间隔部分59的移动朝向循环循环通道的外周侧的运动。 形成除了第一滚动体容纳部以外的第二滚动体容纳部55B,能够使能够朝向环状循环通路的内周侧容纳的滚珠46的移动容纳。