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    • 6. 发明授权
    • Ultrasonic thickness measurement of multilayer structures
    • 多层结构超声波厚度测量
    • US5866819A
    • 1999-02-02
    • US910124
    • 1997-08-13
    • Dan AlbuSalem M. Taboun
    • Dan AlbuSalem M. Taboun
    • G01B17/02G01N29/06G01N29/10
    • G01B17/025G01N2291/044
    • A non-destructive method and apparatus for determining the thickness of individual layers of different materials in a multilayer structure particularly useful in analyzing the layers in a multilayer plastic fuel tank, utilizes a constant and relatively high frequency ultrasonic pulse transmitted into the multilayer structure and records the time when interference pulses are received to determine the thickness of the individual layers in the multilayer structure. The interference pulses are generated at the interface between adjacent layers of sufficiently different materials and thus, the time between interference pulses is a function of the amount of time needed for the ultrasonic pulse to pass through a layer of material. The duration between reflected pulses is called the transmission time which is the time for the ultrasonic frequency to originally pass through the material and also the time for the reflected pulse to bounce back to the transducer and is thus equal to twice the time needed for the ultrasonic pulse to pass through the layer. Therefore, the thickness of a layer within a multilayer structure can be readily computed as one-half of the transmission time multiplied by the speed of sound through the material comprising that layer.
    • 一种非破坏性的方法和装置,用于确定在多层结构中特别可用于分析多层塑料燃料箱中的层的不同材料的各层的厚度,利用传输到多层结构中的恒定且相对高频的超声波脉冲并记录 接收干涉脉冲以确定多层结构中各层的厚度的时间。 干扰脉冲是在相互充分不同的材料层之间的界面处产生的,因此干涉脉冲之间的时间是超声波脉冲穿过一层材料所需的时间量的函数。 反射脉冲之间的持续时间称为传输时间,这是超声频率最初通过材料的时间,反射脉冲的时间也称为反射回传感器的时间,因此等于超声波所需时间的两倍 脉冲通过层。 因此,多层结构中的层的厚度可以容易地计算为传输时间的一半乘以包含该层的材料的声速。
    • 7. 发明授权
    • Ultrasonic testing device for weld seams in pipes, sheets and containers
    • 超声波检测设备用于管道,床单和容器中的焊缝
    • US5677490A
    • 1997-10-14
    • US505339
    • 1996-08-18
    • Werner GuntherBernhard KarbachHelmut HeckhauserSiegmar Schulz
    • Werner GuntherBernhard KarbachHelmut HeckhauserSiegmar Schulz
    • G01N29/04G01N29/22G01N29/26G01N29/10
    • G01N29/043G01N29/221G01N29/26G01N2291/044G01N2291/106G01N2291/2675
    • The ultrasonic testing device for weld seams (28) in pipes, sheets and containers, preferably for circumferential welds in pipelines, is fitted with two identical test head supports (20), each fitted with at least one test head (e.g., 23), arranged in lateral inversion to the weld seam, which acoustically irradiate from the basic material (30) of the pipes or sheets laterally into the weld seam (28) and are coupled to the surface of the basic material (30) opposite the root (32) of the weld seam (28). Each test head support (20) has a plurality of immersion test heads (22-24) arranged one behind the other or side-by-side transversely to the weld seam (28) in such a way that their acoustic irradiation entry regions into the basic material (30) are as close together as possible and of which a) one immersion test head (22) is directed so that it generated a creeping wave in the basic material (30) on the side of the root (36) of the weld seam (28) which spreads out at the surface and of which b) at least two other immersion test heads (23, 24) irradiate at a flatter angle than the first-mentioned head (22) for longitudinal fault testing, and one of these immersion test heads (23) for longitudinal faults irradiates the weld seam (28) in the region of the root (32).
    • PCT No.PCT / DE94 / 00151 Sec。 371日期1996年2月16日 102(e)日期1996年2月16日PCT提交1994年2月14日PCT公布。 公开号WO94 / 19686 日期1994年9月1日管道,片材和容器中焊缝(28)的超声波检测装置,优选用于管道中的圆周焊缝,配有两个相同的测试头支撑件(20),每个测试头支架均装有至少一个测试头 例如23),其横向反转设置在焊接缝上,该焊缝从管道或片材的基本材料(30)侧向地声学照射到焊缝(28)中并且耦合到基材(30)的表面, 与焊缝(28)的根部(32)相对。 每个测试头支撑件(20)具有多个浸入式测试头(22-24),这些浸入式测试头(22-24)以横向于焊缝(28)的方式并排设置,使得它们的声辐射入口区域进入 基本材料(30)尽可能靠近在一起,并且其中a)一个浸入式测试头(22)被引导为使得其在所述基础材料(30)的根部(36)侧产生蠕变波 焊缝(28),其在表面上展开,其中b)至少两个其它浸没试验头(23,24)以比先前提及的头部(22)更平坦的角度照射用于纵向故障测试,并且 这些用于纵向断层的浸没试验头(23)照射在根部(32)的区域中的焊缝(28)。
    • 8. 发明授权
    • Ultrasonic technique for measuring the thickness of cladding on the
inside surface of vessels from the outside diameter surface
    • 用于从外径表面测量容器内表面上的包层的厚度的超声波技术
    • US5661241A
    • 1997-08-26
    • US526522
    • 1995-09-11
    • George Henry Harth, IIIDonald Meade StevensJimmy Wade Hancock
    • George Henry Harth, IIIDonald Meade StevensJimmy Wade Hancock
    • G01B17/02G01N29/07G01N29/10
    • G01B17/025G01N29/07G01N2291/011G01N2291/0231G01N2291/0258G01N2291/02854G01N2291/02881G01N2291/0421G01N2291/044G01N2291/101
    • An ultrasonic inspection method for measuring the thickness of non-welded (non-metallurgically bonded) cladding on the inside surface of a vessel from an outside diameter surface of the vessel relies upon the occurrence of a phase change at an interface between the base metal and cladding layers to precisely determine its presence and location. By measuring the length of time for the ultrasonic pulse to propagate through the cladding material, suitable predetermined calibration standards for the cladding material in question can be used to convert the time of flight of the ultrasonic pulses through the cladding into a thickness of the cladding. The cladding thickness can be measured from an outside surface of the vessel whether or not it is empty and/or without stopping the process and/or draining it, and the method can even be employed at elevated temperatures through the use of known delay lines. Alternatively, if safe access to the interior portion of the vessel is available, an internal direct inspection can be performed to determine the thickness of the non-welded cladding using a modification of the technique in which a first multiple or second reflection signal from the base metal/cladding layer interface is used.
    • 用于从容器的外径表面测量容器的内表面上的非焊接(非冶金结合)包层的厚度的超声波检查方法依赖于在贱金属和 包层以精确地确定其存在和位置。 通过测量超声脉冲传播通过包层材料的时间长度,可以使用所讨论的包层材料的合适的预定校准标准将超声波脉冲穿过包层的时间转换成包层的厚度。 可以从容器的外表面测量包层厚度,无论其是否为空和/或不停止该方法和/或排出,并且该方法甚至可以通过使用已知的延迟线在升高的温度下使用。 或者,如果可以安全地进入容器的内部部分,则可以进行内部直接检查,以使用其中来自基座的第一多个或第二反射信号的技术的修改来确定非焊接包层的厚度 使用金属/包层接口。
    • 9. 发明授权
    • Ultrasound signal processor
    • 超声信号处理器
    • US5591911A
    • 1997-01-07
    • US497803
    • 1995-07-03
    • Hiroshi MasuzawaRyuuichi ShinomuraKageyoshi Katakura
    • Hiroshi MasuzawaRyuuichi ShinomuraKageyoshi Katakura
    • G01B17/00A61B8/00G01B17/06G01N29/40G01N29/44G01N29/50G01S7/52G10K11/34G01N29/06G01N29/10
    • G01N29/50G01N29/069G01N29/40G01S15/8927G01S7/52025G01S7/52085G01S7/52095G10K11/341G01N2291/044G01N2291/106
    • An ultrasound signal processor for receiving an ultrasound signal from a testing body by a plurality of electro-magnetic transducer elements and processing a plurality of received signals to obtain information of the interior of the testing body is provided with analog-digital converters for sampling at least two of received analog signals, multipliers for multiplying the outputs of the analog-digital converters by first complex digital reference signals, first low-pass filters for limiting the signal bands of the outputs of the multipliers, first complex multipliers for multiplying the outputs of the first low-pass filters by second complex digital reference signals, adders for performing the addition of the outputs of the first complex multipliers for real signals and the addition thereof for imaginary signals, memory devices for storing the outputs of the adders, second complex multipliers for multiplying signals read from the memory devices by third complex digital reference signals, and second low-pass filters for limiting the signal bands of the outputs of the second complex multipliers.
    • 一种用于通过多个电磁换能器元件从测试体接收超声信号并处理多个接收信号以获得测试体内部的信息的超声信号处理器具有用于至少采样的模数转换器 两个接收到的模拟信号,乘法器,用于将模拟数字转换器的输出乘以第一复数数字参考信号;第一低通滤波器,用于限制乘法器的输出的信号频带;第一复数乘法器,用于将 通过第二复数数字参考信号的第一低通滤波器,用于执行用于实际信号的第一复数乘法器的输出和虚信号的相加的加法器,用于存储加法器的输出的存储器件,用于存储加法器的输出的第二复乘法器 将由存储器件读取的信号乘以第三复数数字参考信号 s和第二低通滤波器,用于限制第二复数乘法器的输出的信号频带。