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1.发明授权Method and an apparatus for determining the clearance between a turbine casing and the tip of a moving turbine blade 有权用于确定涡轮壳体与移动的涡轮叶片的尖端之间的间隙的方法和装置公开(公告)号：US07400418B2
公开(公告)日：2008-07-15
申请号：US11184864
申请日：2005-07-20
CPC分类号： G01B11/14
摘要： It is disclosed a method and an apparatus of determining the distance (D) between a collimator lens (13) and an object. Low-coherence light is emitted from a light source (1) and directed the low-coherence light through a collimator lens (13) to the object. The reflected light from the collimator lens (13) and the object is directed to a beam splitter (4) and split into two beams. Within the reference arm the frequency of the beam is shifted by an acousto-optical modulator (5) to a certain frequency and within the delay arm the time delay of the beam is scanned by a variable delay line (7). After combining both beams in a beam combiner (8), the presence of a frequency component equal to the frequency shift of the acousto-optical modulator (5) is detected and the distance (D) between the collimator lens (13) and the object is calculated.
摘要翻译： 公开了一种确定准直透镜（13）和物体之间的距离（D）的方法和装置。 低相干光从光源（1）发射并将低相干光通过准直透镜（13）引导到物体。 来自准直透镜（13）和物体的反射光被引导到分束器（4）并分成两束。 在参考臂内，光束的频率被声光调制器（5）移位到一定频率，并且在延迟臂内，通过可变延迟线（7）扫描光束的时间延迟。 在光束组合器（8）中组合两个光束之后，检测到与声光调制器（5）的频移相等的频率分量的存在，以及准直透镜（13）和物体之间的距离（D） 被计算。
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2.发明申请Method and an apparatus for determining the clearance between a turbine casing and the tip of a moving turbine blade 有权用于确定涡轮壳体与移动的涡轮叶片的尖端之间的间隙的方法和装置公开(公告)号：US20060002789A1
公开(公告)日：2006-01-05
申请号：US11184864
申请日：2005-07-20
IPC分类号： F03D11/00
CPC分类号： G01B11/14
摘要： It is disclosed a method and an apparatus of determining the distance (D) between a collimator lens (13) and an object. Low-coherence light is emitted from a light source (1) and directed the low-coherence light through a collimator lens (13) to the object. The reflected light from the collimator lens (13) and the object is directed to a beam splitter (4) and split into two beams. Within the reference arm the frequency of the beam is shifted by an acousto-optical modulator (5) to a certain frequency and within the delay arm the time delay of the beam is scanned by a variable delay line (7). After combining both beams in a beam combiner (8), the presence of a frequency component equal to the frequency shift of the acousto-optical modulator (5) is detected and the distance (D) between the collimator lens (13) and the object is calculated.
摘要翻译： 公开了一种确定准直透镜（13）和物体之间的距离（D）的方法和装置。 低相干光从光源（1）发射并将低相干光通过准直透镜（13）引导到物体。 来自准直透镜（13）和物体的反射光被引导到分束器（4）并分成两束。 在参考臂内，光束的频率被声光调制器（5）移位到一定频率，并且在延迟臂内，通过可变延迟线（7）扫描光束的时间延迟。 在光束组合器（8）中组合两个光束之后，检测到与声光调制器（5）的频移相等的频率分量的存在，以及准直透镜（13）和对象之间的距离（D） 被计算。
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