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11. 发明申请

WO2020263082A1 CONTROL OF A PIEZOELECTRIC TRANSDUCER ARRAY 审中-公开
公开(公告)号：WO2020263082A1
公开(公告)日：2020-12-30
申请号：PCT/NL2020/050403
申请日：2020-06-22
申请人： NEDERLANDSE ORGANISATIE VOOR TOEGEPAST- NATUURWETENSCHAPPELIJK ONDERZOEK TNO
发明人： AKKERMAN, Hylke Broer , VAN NEER, Paul Louis Maria Joseph , VOLKER, Arno Willem Frederik
IPC分类号： B06B1/02 , B06B1/06 , G10K11/34
摘要： A method and system for controlling an array of piezoelectric transducers (11,12,13). Respective driving signals (Vn) are applied to the transducers. The driving signals (Vn) comprise an alternating component (A) oscillating at one or more driving frequencies to cause corresponding vibrations in the transducers for generating acoustic waves (Wn). One or more of the driving signals (Vn) are offset by a respective bias voltage (Bn). The bias voltage (Bn) is controlled to reduce a difference in resonance frequencies between the transducers. To eliminate any remaining difference, the alternating component (A) to at least a subset of the transducers (11,12) is periodically reset. In this way the phases of the resulting acoustic waves (W1,W2) can be synchronized.

12. 发明申请

WO2015119498A1 SYSTEM AND METHOD FOR CRACK MONITORING 审中-公开
标题翻译：破裂监测系统和方法
公开(公告)号：WO2015119498A1
公开(公告)日：2015-08-13
申请号：PCT/NL2015/050075
申请日：2015-02-04
申请人： NEDERLANDSE ORGANISATIE VOOR TOEGEPAST-NATUURWETENSCHAPPELIJK ONDERZOEK TNO
发明人： PAHLAVAN, Lotfollah , VOLKER, Arno Willem Frederik
IPC分类号： G01N29/14 , G01N29/44
CPC分类号： G01N29/14 , G01N29/4472 , G01N2291/0289 , G01N2291/0427
摘要： In accordance with an aspect of the present application, a system is provided for crack monitoring in a structure of interest, comprising means for extracting wave modes existing in a frequency interval of interest, means for finding a source of emission on the structure of interest, means for correcting for dispersion to reconstruct an original ratio of wave modes at the source of emission, and means for correlating the original ratio of wave modes to a crack depth. One advantage of this solution in contrast to prior art techniques is that no a priori knowledge on propagation speed is necessary since actual wave modes can be detected from dispersion relations of wave modes, e.g. Lamb waves at a fixed frequency band in accordance with their calculated speeds. Decentralized acquisition and processing, i.e. monitoring a structure from a localized area, is an important feature of this solution, consequent to which, the data transfer and storage are reduced substantially.
摘要翻译：根据本申请的一个方面，提供了一种用于感兴趣的结构中的裂纹监测的系统，包括用于提取在感兴趣的频率间隔中存在的波形模式的装置，用于在感兴趣的结构上找到发射源的装置，用于校正色散以重建在发射源处的波模的原始比率的装置，以及用于将波模的原始比率与裂纹深度相关联的装置。与现有技术相比，该解决方案的一个优点是不需要传播速度的先验知识，因为可以从波模式的色散关系，例如，兰姆波根据其计算的速度在固定频带。分散式采集和处理，即从局部区域监视结构是该解决方案的重要特征，结果，数据传输和存储被大大降低。

13. 发明申请

WO2015093960A1 ULTRASONIC PIPELINE INSPECTION SYSTEM AND METHOD 审中-公开
标题翻译：超声波管道检测系统及方法
公开(公告)号：WO2015093960A1
公开(公告)日：2015-06-25
申请号：PCT/NL2014/050887
申请日：2014-12-19
申请人： NEDERLANDSE ORGANISATIE VOOR TOEGEPAST-NATUURWETENSCHAPPELIJK ONDERZOEK TNO
发明人： VAN NEER, Paul Louis Maria Joseph , BLACQUIERE, Gerrit , VOLKER, Arno Willem Frederik , BLOKLAND, Huibert
IPC分类号： G01N29/04 , G01N29/07 , G01N29/26 , G01N29/46
CPC分类号： G01N29/07 , G01N29/043 , G01N29/262 , G01N29/46 , G01N2291/044 , G01N2291/106 , G01N2291/2636
摘要： A hollow structure like a pipeline is inspected using an array of ultrasound transmitters located within the hollow structure distributed over different radial directions from a center of the array. Parameters such as ellipticity, defining a shape and/or orientation of an inner surface of a wall of the hollow structure are first determined based on measured delays between transmission of ultrasound pulses from the transmitters to reception of first reflections of those ultrasound pulses. Parameters may be used that define an elliptically shaped cross-section of the inner wall surface for example. Next an ultrasound wavefront composed of joint transmissions from the transmitters along at least a sector of the array is transmitted, using relative time delays between waves transmitted by the respective ones of the transmitters to compensate for estimated differences between travel times from the transmitters to the shape defined by the parameters. Reflections of the joint transmissions are detected. The reflections may be detected by computing derivatives with respect to frequency of phase values of Fourier transforms of the reflected signals and detecting peaks in the size of the computed derivatives of the phase values.
摘要翻译：使用位于分布在阵列中心的不同径向方向上的中空结构内的超声波发射器阵列来检查像管道的中空结构。基于中空结构的壁的内表面的形状和/或定向的参数，例如椭圆度，首先基于从发射机到超声脉冲的第一次反射的传输之间的测量的延迟来确定。可以使用例如限定内壁表面的椭圆形横截面的参数。接下来，使用由发射机沿着阵列的至少一个扇区的联合传输组成的超声波波段，使用由相应发射机发射的波之间的相对时间延迟来补偿从发射机到形状的传播时间之间的估计差异由参数定义。检测到联合传输的反射。可以通过计算相对于反射信号的傅里叶变换的相位值的频率的导数并检测所计算的相位值的导数的大小来检测反射。

14. 发明申请

WO2015030592A2 SYSTEM AND METHOD FOR DEFECT MONITORING 审中-公开
标题翻译：用于缺陷监测的系统和方法
公开(公告)号：WO2015030592A2
公开(公告)日：2015-03-05
申请号：PCT/NL2014/050594
申请日：2014-09-01
申请人： NEDERLANDSE ORGANISATIE VOOR TOEGEPAST-NATUURWETENSCHAPPELIJK ONDERZOEK TNO
发明人： VOLKER, Arno Willem Frederik , VAN ZYL, Petrus Stephanus , PAHLAVAN, Pooria Lotfollah
CPC分类号： G01N29/07 , G01N29/043 , G01N29/44 , G01N29/4472 , G01N2291/0289 , G01N2291/103 , G01N2291/106
摘要： A defect monitoring system has ultrasound transmitters and receivers on a wall of a structure under test such as a pipeline. The receivers are arranged in an array of locations that substantially encloses an area under test on a wall of a structure under test. The array may comprise two circumferential rings along a pipeline at different axial positions. The array of ultrasound receivers is used to measure signals that result ultrasound that leave the area through the wall for other parts of the wall. From the measured signals backward propagated signals are computed for a location within the enclosed area, compensated for a modelled effect of propagation from the location within the area to the locations of the receivers at the perimeter. The backward propagated signals for the location in the enclosed area are summed over the locations of the receivers to obtain an approximate integral over the perimeter of the area. The integral is used as a normalization factor for the backward propagated signals for the location within the area. In this way reflection and/or transmission coefficients are obtained that are indicative of the size of defects in the wall, independent of calibration of ultrasound coupling coefficients.
摘要翻译：缺陷监测系统在被测结构（例如管道）的墙壁上具有超声波发射器和接收器。接收器被布置成基本上围绕被测结构的被测结构区域的位置阵列。阵列可以包括沿不同轴向位置的管道的两个圆周环。超声波接收器的阵列用于测量导致超声波的信号，该超声波将该区域通过墙壁用于墙壁的其他部分。从所测量的信号中，针对封闭区域内的位置计算反向传播信号，补偿了从区域内的位置到接收器在周边的位置的传播的建模效应。在封闭区域中的位置的反向传播信号在接收器的位置上相加以获得在该区域的周边上的近似积分。积分用作区域内位置的反向传播信号的归一化因子。以这种方式，获得指示壁中缺陷大小的反射和/或透射系数，而与超声耦合系数的校准无关。

15. 发明申请

WO2023018332A1 FLEXIBLE ULTRASOUND ARRAY FOR MEASURING A CURVED OBJECT WITH SCATTERING ELEMENT 审中-公开
公开(公告)号：WO2023018332A1
公开(公告)日：2023-02-16
申请号：PCT/NL2022/050468
申请日：2022-08-12
申请人： NEDERLANDSE ORGANISATIE VOOR TOEGEPAST-NATUURWETENSCHAPPELIJK ONDERZOEK TNO
发明人： VAN DER STEEN, Jan-Laurens Pieter Jacobus , PETERS, Laurens Christiaan Johannes Maria , VAN NEER, Paul Louis Maria Joseph , VOLKER, Arno Willem Frederik
IPC分类号： G01S7/52 , G01S15/89 , G01S5/18 , G01N29/22 , G01N29/26 , A61B8/00
摘要： A system and method for acoustically measuring a curved object (Obj). A flexible sheet (20) is provided with an array of acoustic transducers (10). The flexible sheet (20) is wrapped around the curved object (Obj) such that the acoustic transducers (10) acoustically contact the curved object (Obj). The acoustic transducers (10) are used to generate and/or measure acoustic waves (W) at variable locations depending on a shape of the curved object (Obj). Spatial coordinates (X,Y,Z) of the acoustic transducers (10) are determined, while the flexible sheet (20) is wrapped around the curved object (Obj). In particular, the spatial coordinates are determined based on respective subsets of travel times (Ta,Tb,Tc) used to calculate respective wave directions of the acoustic waves (Wa,Wb,Wc) arriving at respective subarrays (10a,10b,10c) from a common origin, e.g. scattering element (S) inside the curved object (Obj).

16. 发明申请

WO2020040640A1 DEVICE AND METHOD FOR INTERFEROMETRIC MEASUREMENT OF A TWO OR THREE DIMENSIONAL TRANSLATION OF AN OBJECT 审中-公开
公开(公告)号：WO2020040640A1
公开(公告)日：2020-02-27
申请号：PCT/NL2019/050546
申请日：2019-08-26
申请人： NEDERLANDSE ORGANISATIE VOOR TOEGEPAST- NATUURWETENSCHAPPELIJK ONDERZOEK TNO
发明人： CHENG, Lun Kai , VOLKER, Arno Willem Frederik , TOET, Peter Martijn
IPC分类号： G01B11/24 , G01B9/02
摘要： Translations of an object in a plurality of different spatial directions are measured using a plurality of interferometers to detect interference with light that has been reflected from a diffusively reflective surface, preferably using diffuse reflection from the same planar surface to measure in each of the different spatial directions. At least the interferometers that measure translation in directions that are not perpendicular to the surface each comprises a single mode fiber and a collimator configured to transmit the outgoing light to the object successively through the single mode fiber and the collimator, and to collect reflection into the single mode fiber with the collimator both along a same beam direction. It has been found that, when reflection of a beam with a beam direction at an oblique angle to a diffusively reflective surface is used, the interference resulting from translation of the object is due substantially only to translation in the beam direction.

17. 发明申请

WO2017086782A1 TORSION WAVE BASED FLUID DENSITY MEASURING DEVICE AND METHOD 审中-公开
标题翻译：基于扭转波的流体密度测量装置和方法
公开(公告)号：WO2017086782A1
公开(公告)日：2017-05-26
申请号：PCT/NL2016/050797
申请日：2016-11-16
申请人： NEDERLANDSE ORGANISATIE VOOR TOEGEPAST-NATUURWETENSCHAPPELIJK ONDERZOEK TNO
发明人： VAN NEER, Paul Louis Maria Joseph , VOLKER, Arno Willem Frederik , VAN DEN DOOL, Teunis Cornelis
IPC分类号： G01N9/24 , G01N29/02 , G01N29/024 , G01N29/22
CPC分类号： G01N9/24 , G01N29/024 , G01N29/222 , G01N2291/0222 , G01N2291/02818 , G01N2291/0426
摘要： A fluid density measuring device uses a pipe with a pipe wall that has an inner wall surface with a non-circular cross-section at least in an axial segment of the pipe. Preferably, the inner wall surface comprises one or more protrusions extending inward into the pipe and along the axial direction of the pipe. An ultrasound transducer located on the pipe wall is used to generate local motion of the pipe wall with a circumferential direction of motion. Preferably, the ultrasound transducer is located between successive protrusions. An ultrasound receiver located on the pipe wall receives an ultrasound torsion wave generated by said local motion after the torsion wave has traveled through the axial section wherein the inner wall surface has a non-circular cross-section. The fluid density is determined from the propagation speed of the torsion wave.
摘要翻译：流体密度测量装置使用具有管壁的管，该管壁具有至少在管的轴向部分中具有非圆形横截面的内壁表面。优选地，内壁表面包括一个或多个向内延伸到管中并沿着管的轴向方向的突起。位于管壁上的超声换能器用于产生具有周向运动的管壁的局部运动。优选地，超声换能器位于连续的突起之间。位于管壁上的超声波接收器在扭转波已经穿过其中内壁表面具有非圆形横截面的轴向部分之后接收由所述局部运动产生的超声扭转波。流体密度由扭转波的传播速度决定。

18. 发明申请

WO2022207634A1 ACOUSTIC INSPECTION DEVICE AND INSPECTION METHOD USING AN INVERSE WAVE FIELD PROPAGATION MODEL 审中-公开
公开(公告)号：WO2022207634A1
公开(公告)日：2022-10-06
申请号：PCT/EP2022/058253
申请日：2022-03-29
申请人： NEDERLANDSE ORGANISATIE VOOR TOEGEPAST-NATUURWETENSCHAPPELIJK ONDERZOEK TNO
发明人： VOLKER, Arno Willem Frederik , MERKS-SWOLFS, Egon Jacobus Wilhelmus , VAN DER BURG, Dennis Wilhelmus , DUIJSTER, Adrianus Johannes
IPC分类号： G01N29/04 , G01N29/11 , G01N2291/012 , G01N2291/015 , G01N2291/0258 , G01N2291/02854 , G01N2291/0425 , G01N2291/0427 , G01N29/043 , G01N29/045
摘要： A position dependent wave vector amplitude of vibrations on a surface of a structure is determined from acoustic measurements using a sensing device at distance from the surface. The device contains an array of microphones in a fluid medium outside the structure. Vibrations in the structure, which travel through the structure e.g. as Lamb waves. This generates sound outside the structure by leakage of sound waves from the surface of the structure. The microphones obtain measured signals from the sound. Furthermore, a measurement of such as distance is obtained that depends on the measurement position where the array of microphones is provided. The parameter is used in an inverse wave field propagation model for sound propagation in the fluid medium between the surface of the structure and the array of microphones. The inverse wave field propagation model is applied to the measured signals to obtain a position dependent estimation of the sound amplitude and/or phase at the surface. The wave vector amplitude of the vibration as a function of position on the surface is computed from the position dependent estimation.

19. 发明申请

WO2020122728A1 DEVICE AND METHOD FOR PERFORMING ULTRASONIC MEASUREMENTS OF FLUID PROPERTIES 审中-公开
公开(公告)号：WO2020122728A1
公开(公告)日：2020-06-18
申请号：PCT/NL2019/050838
申请日：2019-12-16
申请人： NEDERLANDSE ORGANISATIE VOOR TOEGEPAST- NATUURWETENSCHAPPELIJK ONDERZOEK TNO
发明人： VAN GROENESTIJN, Gert-Jan Adriaan , VAN NEER, Paul Louis Maria Joseph , WIERINGA, Fokko Pieter , VOLKER, Arno Willem Frederik , CHENG, Lun Kai
IPC分类号： G01F1/66
摘要： Ultrasonic measurements of fluid properties are performed with the aid of an optical fiber or a package of optical fibers by exciting ultrasound waves at a first location along the optical fiber in the fluid by means of light from the optical fiber and detecting an effect of the ultrasound waves on light reflection or propagation in the optical fiber and/or a further optical fiber in the package at a second location along the optical fiber or at the end of the optical fiber.

20. 发明申请

WO2013122466A1 A PRESSURE MEASURING DEVICE 审中-公开
标题翻译：压力测量装置
公开(公告)号：WO2013122466A1
公开(公告)日：2013-08-22
申请号：PCT/NL2013/050092
申请日：2013-02-15
申请人： NEDERLANDSE ORGANISATIE VOOR TOEGEPAST-NATUURWETENSCHAPPELIJK ONDERZOEK TNO
发明人： VOLKER, Arno Willem Frederik
IPC分类号： G01L9/00 , G01L11/02 , G01L11/04
CPC分类号： G01L9/0008 , G01L11/02 , G01L11/04 , G01N9/002
摘要： The invention relates to a pressure measurement device for enabling non-intrusive pressure measurement of a first fluid present in a volume having at least one wall, the device comprising: an enclosed space filled with a second fluid, a transmitter provided in the enclosed space and adapted to transmit a standing wave in a direction of the said wall, means for varying a pressure of the second fluid in the enclosed space, a detector for measuring data related to a resonance of the wall and a processor for determining a characteristic change in said data.
摘要翻译：本发明涉及一种能够对存在于具有至少一个壁的体积中的第一流体进行非侵入式压力测量的压力测量装置，所述装置包括：填充有第二流体的封闭空间，设置在封闭空间中的发射器，适于在所述壁的方向上传播驻波，用于改变所述封闭空间中的所述第二流体的压力的装置，用于测量与所述壁的共振相关的数据的检测器和用于确定所述壁的特性变化的处理器数据。

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