公开(公告)号：EP1356264A2

公开(公告)日：2003-10-29

申请号：EP01965456.5

申请日：2001-09-13

申请人： BAE Systems Ltd

发明人： BATES, Daniel

IPC分类号： G01N21/35 ,  G01N25/72 ,  G01N29/04

CPC分类号： G01N29/345 ,  G01N25/72 ,  G01N29/045 ,  G01N29/40 ,  G01N33/20 ,  G01N2021/1731 ,  G01N2291/014 ,  G01N2291/0231 ,  G01N2291/106 ,  G01N2291/2694

摘要： Apparatus (10) for non-destructively testing material (S) to enable detection of any damage sites (D), comprising means (14) for generating localised heating at any damage site in the material, and means (16) for imaging the material to enable detection of any localised heating at the damage site.

公开(公告)号：EP1325318A1

公开(公告)日：2003-07-09

申请号：EP01957517.4

申请日：2001-08-10

申请人： Swantech, L.L.C.

发明人： BOARD, David, B.

IPC分类号： G01N29/00 ,  G01N29/06

CPC分类号： G01N29/42 ,  G01H1/003 ,  G01L1/255 ,  G01N29/045 ,  G01N29/12 ,  G01N29/227 ,  G01N29/36 ,  G01N2291/014 ,  G01N2291/015 ,  G01N2291/02827 ,  G01N2291/269

摘要： A sensor (20) is disclosed specifically for detecting stress waves for use in a stress wave analysis system. The stress waves are preferably detected in a narrow frequency range of 35-40 KHz. At this range, stress waves from friction and impact source typically propagate through machine structures at detectable amplitudes. In order to maximize the signal to noise ratio of stress waves, relative friction and impact sources typically propagate through machine structures at detectable amplitudes. In order to maximize the signal to noise ratio of stress waves, relative to background noise and vibration, the sensor (20) of the present invention is designed and calibrated with a frequency response and damping features that are specifically tailored for stress wave analysis.

公开(公告)号：EP1208375A1

公开(公告)日：2002-05-29

申请号：EP00950113.1

申请日：2000-07-27

申请人： Carter Holt Harvey Limited

发明人： HARRIS, Paul, David ,  ANDREWS, Michael, Kenneth

IPC分类号： G01N33/46 ,  G01N29/18

CPC分类号： G01N3/48 ,  G01N29/045 ,  G01N29/46 ,  G01N33/46 ,  G01N33/48 ,  G01N2203/0623 ,  G01N2291/015 ,  G01N2291/0238 ,  G01N2291/02827 ,  G01N2291/0421

摘要： Apparatus (preferably portable) enabling a felled tree stem or log (2), tapped at one end in order to generate an acoustic wave, to have its stiffness characterised echo data both sensed and analysed. The analysis is with best fit recognition procedure and/or one that emphasises high harmonics to determine fundamental frequency related to acoustic speed which is indicative of the stiffness characteristics of the tree stem or log. The apparatus uses an accelerometer pressed compliantly against an end of the tree stem or log to detect reflections from the other end after impacting the first end. The accelerometer is compliantly mounted in a sensing head (1) connected by a flexible link to a housing carrying processing and display means (4, 5, 6). Also disclosed is a method of cutting a stem (2) into logs of predicted speeds by establishing a function which represents the nature of speed variation with distance along the stem characteristic for a species and locality. The average speed along a stem and the speed function are used to compute the likely speed at points along the stem, then marking and routing logs cut from the stem according to their speed.

公开(公告)号：EP1158296A2

公开(公告)日：2001-11-28

申请号：EP01500119.1

申请日：2001-05-14

申请人： Segui Pascuel, Vicente

发明人： Segui Pascuel, Vicente

IPC分类号： G01N33/38

CPC分类号： G01N29/46 ,  G01N21/88 ,  G01N29/045 ,  G01N29/4445 ,  G01N33/388 ,  G01N2291/0232 ,  G01N2291/2698

摘要： The machine comprises two areas. In the first area (5) the sound wave of each part is analysed in order to detect possible fissures or internal defects. IN the second area (6) the part is analysed by an artificial vision system in order to detect such faults as broken corners, incomplete parts, incorrect painting of the part, part sizes outside tolerance limits, incorrect colour hues and other characteristics which are detected by the computerised vision system (1), (2) which the machine includes.
The machine solves the problem of quality control of ceramic products by an automated and more reliable manner than the currently employed manual method. Alternatives: the machine may include only the artificial vision module to control only external or visible defects.

摘要翻译： 该机器包括两个方面。 在第一区域（5）各部分的声波，以便检测可能的裂缝或内部缺陷进行分析。 在第二区域（6）的一部分通过人工视觉系统中，为了检测寻求故障为已损坏角部，不完整的部分，该部分的不正确绘画，公差范围之外的部分的大小，不正确的颜色的色调和其他特性被检测，分析结果 由计算机化视觉系统（1.2）其中，机器包括。 该机解决了陶瓷产品的质量控制通过在自动化和更可靠的方式比目前使用的手动方法的麻烦。

公开(公告)号：EP0906560A1

公开(公告)日：1999-04-07

申请号：EP97928616.0

申请日：1997-06-17

申请人： Dynalyse AB

发明人： LARSSON, Daniel ,  OHLSSON, Sven ,  PERSTORPER, Mikael

IPC分类号： G01B17 ,  G01M7 ,  G01N3 ,  G01N29 ,  G01N33

CPC分类号： G01N3/307 ,  G01M7/08 ,  G01N29/045 ,  G01N33/46 ,  G01N2203/0623 ,  G01N2291/014 ,  G01N2291/0238 ,  G01N2291/0427 ,  G01N2291/262 ,  G01N2291/2632

摘要： Method and device for nondestructive determination of rigidity, strength and/or structural properties of preferably oblong and/or plate-shaped objects (11), alternatively determination of the geometrical dimensions of the object, through impact excitation and registration of resonance frequencies of natural modes of the object. According to the invention resonance frequency from at least one of the natural modes of the object is used, which resonance frequency is achieved by bringing the object (11) in vibration by means of a stroking body (24, 31, 38), and substantially controlling the initiation of the motion of the stroking body (24, 31, 38) and subsequent physical impact in time and space by motion of the object (11).

公开(公告)号：EP0704050B1

公开(公告)日：1998-08-26

申请号：EP94909835.4

申请日：1994-03-01

申请人： WASHINGTON UNIVERSITY

发明人： DIMAROGONAS, Andrew, D.

IPC分类号： G01H1/00 ,  G01H9/00 ,  G01H13/00 ,  G01D7/00 ,  G01N7/00 ,  G01N3/32 ,  G01N21/00 ,  G01N24/00 ,  G01N29/00 ,  G01N29/04 ,  G01N29/12 ,  G01M7/00

CPC分类号： G01N3/30 ,  G01H1/16 ,  G01N3/32 ,  G01N29/045 ,  G01N29/11 ,  G01N29/12 ,  G01N2203/0055 ,  G01N2203/0073 ,  G01N2203/0688 ,  G01N2291/0235 ,  G01N2291/0258 ,  G01N2291/02827 ,  G01N2291/101 ,  G01N2291/267

摘要： The fatigue integrity of metallic materials may be determined be either one of two methods. In a first method, an impulse of energy is introduced into the metallic material, such as by striking the metallic material (20), and the induced vibration is sensed and analyzed in order to compute the damping factor thereof, the damping factor being directly related to the fatigue thereof. With this method, a transducer (28) is coupled to the metallic material and its output is amplified by an amplifier (30) before being input to a computer (32) which determines the damping factor. In a second method, a continuous energy input is provided to the metallic material, such as by utilizing a frequency generator coupled to a power amplifier whose output drives a transducer such as a speaker or the like for inducing a continuous vibration in the metallic material. This continuous vibration is measured with a transducer, an amplifier, and a damping factor calculated with a computer as in the first method.

公开(公告)号：EP0832429A1

公开(公告)日：1998-04-01

申请号：EP96921246.0

申请日：1996-05-31

申请人： WASHINGTON UNIVERSITY

发明人： DIMAROGONAS, Andrew, D.

IPC分类号： G01N29 ,  G01H1 ,  G01H13 ,  G01M7 ,  G01N3

CPC分类号： G01H1/16 ,  G01N3/30 ,  G01N3/32 ,  G01N29/045 ,  G01N29/11 ,  G01N29/12 ,  G01N2203/0055 ,  G01N2203/0073 ,  G01N2203/0688 ,  G01N2291/0235 ,  G01N2291/0258 ,  G01N2291/02827 ,  G01N2291/101 ,  G01N2291/267

摘要： The integrity of structures may be determined by either one of two methods. In a first method, an impulse of energy is introduced into the structure (20), such as by striking the structure (20), and the induced vibration is measured and the modal damping factor is calculated, the modal damping factor being directly related to the integrity of the structure (20). In a second method, a continous energy input is provided to the structure (20) for inducing a continous vibration in the structure (20). This continous vibration is measured with a transducer (28) and a modal damping factor is calculated with a computer (32). The computer uses an algorithm to estimate the modal damping factor of the structure by calculating a theoretical response of an idealized system from several assumed parameters and varying those parameters.

公开(公告)号：EP0754263A1

公开(公告)日：1997-01-22

申请号：EP95914448.0

申请日：1995-04-05

申请人： ABERDEEN UNIVERSITY ,  UNIVERSITY OF BRADFORD

发明人： RODGER, Albert, Alexander ,  LITTLEJOHN, Gavin, Stuart

IPC分类号： E02D33 ,  G01N29

CPC分类号： E02D33/00 ,  G01N29/045

摘要： The invention relates to a method for monitoring the condition of a ground anchorage (2) in a bore in a ground formation (1) at a site, which method comprises: securing a means for monitoring frequency response spectra (10) to said ground anchorage, applying to said ground anchorage an impulse load (11) of a predetermined value, recording the signature of the frequency response spectra, and comparing said signature with a reference signature from the site, thereby to obtain an indication of the integrity of the ground anchorage in the formation.

公开(公告)号：EP0519045B1

公开(公告)日：1996-09-11

申请号：EP92903021.1

申请日：1991-12-13

申请人： CORNELL RESEARCH FOUNDATION

发明人： SANSALONE, Mary, J. ,  PRATT, Donald, G.

IPC分类号： G01N29/04 ,  G01N3/30

CPC分类号： G01N29/045 ,  G01N3/30 ,  G01N2203/0039 ,  G01N2203/0218 ,  G01N2203/0476 ,  G01N2203/0676 ,  G01N2291/044

摘要： The apparatus of the invention comprises a portable, hand-held unit having a plurality of impactors disposed therein. The plurality of impactors comprise a number of differently weighted spheres that are each designed to impart a different impact energy into the structure to be tested. Each sphere is disposed on a distal end of a spring-steel rod. A particular weighted sphere is chosen by a selector disposed on the testing unit. The sphere is withdrawn from the rest position by a pair of jaws to a given height above the structure. At a predetermined released point, the sphere is released, causing it to impact the structure with a specific duration and impart a given energy thereto. The impact produces stress waves that are reflected from the internal flaws and external surfaces of the structure. The reflected waves are detected by a transducer that converts the stress waves into an electrical signal (displacement waveform). The waveform is then processed to provide an amplitude spectrum, and in the case of plates, a reflection spectrum. For plates, the reflection spectrum can be interpreted by a neural network which provides results that are indicative of either the thickness of the structure or of the defects disposed therein.

公开(公告)号：EP0696734A1

公开(公告)日：1996-02-14

申请号：EP95401839.6

申请日：1995-08-04

申请人： AEROSPATIALE Société Nationale Industrielle

发明人： Baudrillard, Gilles ,  Bouju, Christophe Pierre

IPC分类号： G01N29/04

CPC分类号： G01N29/4481 ,  G01N29/045 ,  G01N29/30 ,  G01N29/4445 ,  G01N29/449 ,  G01N2291/0231

摘要： Pour effectuer le contrôle au son automatisé de pièces complexes (10) telles que des pales d'hélicoptères, on soumet la surface à contrôler à des chocs successifs, au moyen d'une tête d'impactage 12 que l'on déplace selon un pas déterminé. Les sons produits par ces chocs sont recueillis par un microphone 16, associé à un circuit d'acquisition 18. Au moins deux signaux sonores successifs, consécutifs ou non, sont comparés afin d'établir un diagnostic de défauts. La comparaison et le diagnostic sont rassurés par un réseau de neurones, après que le nombre de points représentatifs de chaque signal sonore ait été réduit lors d'un prétraitement comportant une étape de sélection suivie d'une étape de lissage.

摘要翻译： 工件（10）的表面进行冲击的从头部（12）的连续安装在支撑（13）在平行的平面正交的方向（X，Y）移动。 由冲击引起的声谐振是通过在同一载体上的麦克风（16）拾取。 信号由电子电路（18）的微型计算机（20），其控制诊断和缺陷映射的序列上传递，并bestimmt由控制电路（14）执行的头部运动的幅度和频率。