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公开(公告)号：US5092176A
公开(公告)日：1992-03-03
申请号：US546283
申请日：1990-06-29
CPC分类号： G01N29/11 , G01N9/24 , G01N2291/0231 , G01N2291/02818 , G01N2291/0422 , G01N2291/101 , G01N2291/2634
摘要： A method of determining low density deposits on the inner surface of a boiler tube comprises the generation of ultrasonic energy which is directed from the outer surface of the tube to the inner surface of the tube. The energy is reflected back and forth between the inner and outer surfaces with each reflection of the inner surface loosing energy by attenuation into any existing low density deposit. The first and fourth reflections are measured and digitized for analysis to determine the amount of attenuation. The amount of attenuation is representative of the low density deposit on the inner surface of the tube. The tube is preferably empty of water to avoid transmission of ultrasonic energy through water in the tube.
摘要翻译： 确定锅炉管内表面上的低密度沉积物的方法包括从管的外表面引导到管的内表面的超声能量的产生。 能量在内表面和外表面之间来回反射，内表面的每个反射通过衰减成任何现有的低密度沉积物而失去能量。 测量第一和第四反射并数字化以进行分析以确定衰减量。 衰减量代表管内表面上的低密度沉积物。 管优选为空的水，以避免超声能量通过管中的水传播。
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公开(公告)号：US4193843A
公开(公告)日：1980-03-18
申请号：US764797
申请日：1977-02-02
CPC分类号： G21C17/07
摘要： Defects in the fuel rods of nuclear fuel assemblies are ascertained and located by ultrasonic means. The fuel assemblies are subjected to ultrasonic waves. Differences in fuel rod resonance is indicative of defective rods.
摘要翻译： 核燃料组件的燃料棒中的缺陷通过超声波装置确定和定位。 燃料组件经受超声波。 燃料棒共振的差异表明有缺陷的棒。
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公开(公告)号：US4907455A
公开(公告)日：1990-03-13
申请号：US198409
申请日：1988-05-25
摘要： An ultrasonic transducer arrangement for inspecting a work piece at an elevated temperature through the use of ceramic delay lines is disclosed. The ceramic material utilized for the delay lines is comprised of a composition of silicon nitride and boron nitride which is hot pressed so that the boron nitride platelets are aligned substantially parallel to the propagation direction of the ultrasonic pulses thus minimizing pulse attenuation. The ceramic material is heat and wear resistant and can be machined so as to conform to the surface of the work piece being inspected.
摘要翻译： 公开了一种用于通过使用陶瓷延迟线在高温下检查工件的超声换能器装置。 用于延迟线的陶瓷材料由氮化硅和氮化硼的组合物组成，其被热压，使得氮化硼薄片基本上平行于超声波脉冲的传播方向排列，从而使脉冲衰减最小化。 陶瓷材料是耐热和耐磨的，并且可以被机加工以符合被检查的工件的表面。
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公开(公告)号：US4702112A
公开(公告)日：1987-10-27
申请号：US764912
申请日：1985-08-12
CPC分类号： G01S7/52057 , G01N29/0618 , G01N29/343 , G01N29/348 , G01N29/36 , G01N29/4454 , G01S7/5203 , G01N2291/044
摘要： An ultrasonic apparatus and method for testing a material comprises an oscillator which generates a selected frequency in the ultrasonic range. A transducer is connected to the oscillator for applying an ultrasonic signal to the material and for receiving an echo signal back from the material. Two phase detectors are utilized one of which receives the echo signal and an in-phase oscillator signal to generate a first display signal, and the other of which receives a quadrature signal which is 90.degree. out of phase from the oscillator signal, as well as the echo signal to generate a second display signal. The first and second display signals are utilized in a visual display such as a cathode ray tube, to generate an image. The image changes according to the phase shift between the ultrasonic signal transmitted into the material and the echo signal, which, in turn, can be utilized to determine the presence and depth of a flaw or boundary in the material.
摘要翻译： 用于测试材料的超声波装置和方法包括在超声波范围内产生选定频率的振荡器。 传感器连接到振荡器，用于向材料施加超声波信号并从材料接收回波信号。 使用两相检测器，其中一个接收回波信号和同相振荡器信号以产生第一显示信号，另一个接收来自振荡器信号的90°异相的正交信号，以及 回波信号产生第二显示信号。 第一和第二显示信号用于诸如阴极射线管的视觉显示器中，以产生图像。 图像根据传输到材料中的超声波信号与回波信号之间的相移而发生变化，而回波信号又可用于确定材料中缺陷或边界的存在和深度。
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公开(公告)号：US4313791A
公开(公告)日：1982-02-02
申请号：US794507
申请日：1977-05-06
CPC分类号： G01N29/225 , G01N29/38 , G21C17/07 , G01N2291/044
摘要： Defects in nuclear fuel elements are ascertained and located within an assembled fuel assembly by ultrasonic means. In a typical embodiment of the invention, an ultrasonic search unit is positioned within the fuel assembly opposite the lower plenum of the fuel element to be tested. An ultrasonic pulse is radially projected into the element. Defective fuel elements are ascertained by ultrasonic reflection measurements.
摘要翻译： 确定核燃料元件的缺陷并通过超声波装置位于组装的燃料组件内。 在本发明的典型实施例中，超声波搜索单元位于燃料组件内，与待测试的燃料元件的下部增压室相对。 超声波脉冲径向投影到元件中。 通过超声波反射测量确定有缺陷的燃料元件。
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公开(公告)号：US4174255A
公开(公告)日：1979-11-13
申请号：US794508
申请日：1977-05-06
申请人： William E. Lawrie
发明人： William E. Lawrie
CPC分类号： G01N29/245 , G01N29/223 , G21C17/07
摘要： An ultrasonic search unit for locating defective fuel elements within a fuel assembly used in a water cooled nuclear reactor is presented. The unit is capable of freely traversing the restricted spaces between the fuel elements.
摘要翻译： 提出了一种用于在水冷核反应堆中使用的燃料组件内定位有缺陷的燃料元件的超声波搜索单元。 该单元能够自由地穿过燃料元件之间的限制空间。
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