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    • 12. 发明申请
    • PROBE FOR SURFACE MEASUREMENT
    • 探测表面测量
    • WO1993002337A1
    • 1993-02-04
    • PCT/GB1992001373
    • 1992-07-24
    • BRITISH TECHNOLOGY GROUP LTD.BUTLER, CliveGREGORIOU, Gregorios
    • BRITISH TECHNOLOGY GROUP LTD.
    • G01B11/30
    • G01B11/303
    • The invention provides surface-measuring apparatus comprising a probe and means for moving the probe towards and away from a surface under examination and for monitoring such movement, the probe comprising a plurality of closely spaced light-collecting elements arranged in a light-collecting plane, lens means positioned to produce a sharply focussed image of said light collecting elements at an image plane movable relative to said surface by movement of the probe, illuminating means so arranged that the lens unit forms and illuminated spot image of it in the image plane in coincidence with the image in the image plane of one of the light-collecting elements, and means for measuring the incidence of light on the said one of the light-collecting elements and on surrounding ones of those elements. In one embodiment, the probe incorporates a bundle of, say, seven optical fibres which each have one end exposed at an end plane of the bundle and constituting a respective one of the light-collecting elements, the fibres being connected at their other ends to photodiodes or other photodetector means for measuring the incidence of light on the exposed ends of the fibres. In another embodiment, the light-collecting elements are the individual detector cells comprised in the detector array of a solid state camera, the cells being organised in groups each having a central cell and a plurality of surrounding cells, and the illuminating means may be a screen with appropriately located apertures illuminated from behind, so placed relative to a beam-splitter arranged between the detector array and the lens means that the images of the illuminated apertures in the beam splitter coincide with the central cells of the respective groups.
    • 本发明提供了一种包括探针的表面测量装置和用于将探针朝向和远离被检查表面移动并用于监测这种运动的装置,该探针包括布置在聚光平面中的多个紧密间隔的聚光元件, 透镜装置被定位成通过探头的移动在相对于所述表面可移动的图像平面上产生所述聚光元件的锐利聚焦图像,所述照明装置被布置成使得所述透镜单元在所述图像平面中一致地形成并照亮它们的斑点图像 其中一个光收集元件的图像平面中的图像,以及用于测量所述一个光收集元件上的所述一个以及这些元件周围的光的入射的装置。 在一个实施例中,探针包含一束,例如七根光纤,每束光纤的一端在光束的端面处露出,并构成相应的一个光收集元件,光纤的另一端连接到 光电二极管或其他光电检测器装置,用于测量纤维暴露端上的光的入射。 在另一个实施例中,光收集元件是包括在固态照相机的检测器阵列中的各个检测器单元,该单元被组织成各自具有中心单元和多个周围单元,并且该照明装置可以是 相对于布置在检测器阵列和透镜之间的分束器相对放置的适当定位的从后面照射的孔的屏幕意味着分束器中的照射孔径的图像与各个组的中心单元重合。
    • 18. 发明申请
    • FLOWMETERS
    • 流量计
    • WO1994002069A1
    • 1994-02-03
    • PCT/GB1993001498
    • 1993-07-16
    • BRITISH TECHNOLOGY GROUP LTD.SKIDMORE, Robert
    • BRITISH TECHNOLOGY GROUP LTD.
    • A61B08/06
    • A61B8/065A61B8/08
    • The invention provides a probe (1) and method for measuring parameters of fluid flow in a conduit within a human or animal body, with specific application to non-invasive measurement of the cross-sectional area of blood vessels, particularly the ascending aorta (24). The probe (1) contains an ultrasound transducer (2) and an acoustic reflector (4) drivable in an oscillatory manner by an electric motor (8). A narrow ultrasound beam (3) is directed downwardly via the suprasternal notch (26) and swept by the reflector through an arc. The probe (1) has an external dimension transverse to the ultrasound beam path (3) which reduces substantially from the region of the transducer to the region (14) where the beam exits the probe. The invention has application in monitoring cardiac output.
    • 本发明提供了一种用于测量人体或动物体内导管内的流体流动参数的探针(1)和方法,其具体应用于非侵入性测量血管横截面积,特别是升主动脉(24 )。 探针(1)包含超声换能器(2)和由电动机(8)以振荡方式驱动的声反射器(4)。 窄超声波束(3)经由超上限凹口(26)向下引导并被反射器扫过弧。 探针(1)具有横向于超声波束路径(3)的外部尺寸,其基本上从换能器的区域减小到射束离开探针的区域(14)。 本发明适用于监测心输出量。