公开(公告)号：US5886352A

公开(公告)日：1999-03-23

申请号：US836150

申请日：1997-07-01

Applicant: David A Wright ,  Geoff McFarland

Inventor： David A Wright ,  Geoff McFarland

IPC: G01D5/347 ,  G01D5/38 ,  G01D5/34

CPC classification number: G01D5/34715 ,  G01D5/38

Abstract: A readhead for an opto-electronic encoder includes a light source, an analyser grating and a detector. The light source illuminates a scale of the opto-electronic encoder such that the light passed on by the scale forms a periodic light pattern. The analyser grating interacts with the periodic light pattern to generate a resultant fringe pattern. The resultant fringe pattern is incident upon the detector which generates a plurality of phase shifted cyclically modulating signals upon relative movement of the readhead positioned in registration with the scale. Either the periodic light pattern or the resultant fringe pattern is a linear pattern while a remaining one of the periodic light pattern and the resultant fringe pattern is an angular pattern.

Abstract translation: PCT No.PCT / GB96 / 02699。 371日期1997年7月1日 102（e）1997年7月1日PCT PCT 1996年11月4日PCT公布。 出版物WO97 / 16704 日期1997年5月9日光电编码器的读数头包括光源，分析仪光栅和检测器。 光源照亮光电编码器的刻度，使得由刻度尺通过的光形成周期性的光图案。 分析器光栅与周期性光图案相互作用以产生合成的条纹图案。 所得到的条纹图案入射到检测器上，该检测器在与标尺对准的读取头的相对运动时产生多个相移循环调制信号。 周期性光图案或所得到的条纹图案是线性图案，而周期性光图案和所得到的边缘图案中的剩余部分是角图案。

公开(公告)号：US06633051B1

公开(公告)日：2003-10-14

申请号：US09701699

申请日：2000-12-01

Applicant: Alan J Holloway ,  Kevyn B Jonas ,  David A Wright

Inventor： Alan J Holloway ,  Kevyn B Jonas ,  David A Wright

IPC: G01N2186

CPC classification number: G01B11/007

Abstract: A surface sensing device includes an articulating head adapted for attachment to the spindle of a measuring machine and having two relatively rotatable parts capable of rotation about two mutually perpendicular axes. The device additionally includes a stylus assembly having a relatively stiff hollow stylus carrier, and a relatively flexible hollow stylus. An optical transducer system is provided within the stylus assembly and comprises a fixed light source which directs a beam of light towards a stylus tip, and a retro-reflective component at the tip which reflects the beam back to a fixed detector. The arrangement is such that lateral displacement of the stylus tip when the tip is in contact with a surface can be measured directly.

Abstract translation: 表面感测装置包括铰接头，该铰接头适于附接到测量机的心轴上并且具有两个相对可旋转的部件，能够围绕两个相互垂直的轴线旋转。 该装置还包括具有相对刚性的空心触针托架的触针组件和相对柔性的中空触针。 光学传感器系统设置在触针组件内，并且包括将光束引向触针尖端的固定光源以及将光束反射回固定探测器的尖端处的反射反射部件。 这种布置使得当尖端与表面接触时触针尖端的横向位移可以直接测量。

公开(公告)号：US06434846B1

公开(公告)日：2002-08-20

申请号：US09701735

申请日：2000-12-04

Applicant: David R McMurtry ,  Alexander T Sutherland ,  David A Wright

Inventor： David R McMurtry ,  Alexander T Sutherland ,  David A Wright

IPC: G01B2104

CPC classification number: B82Y15/00 ,  G01B21/042

Abstract: A method of calibrating a scanning system comprising a machine and a measuring probe, includes the steps of error mapping the system statically and qualifying the stylus tip so that the system will provide accurate measurements, determining the positions of a number of datum points on the surface of an artefact with the probe stylus in contact with the workpiece and at zero deflection normal to the surface, scanning the surface through the datum points at a nominal stylus deflection and at the maximum speed which provides repeatable position measurements to make a second determination of the positions of the datum points, determining the errors attributable to the scanning process by subtracting the positions obtained in the first and second determinations, and storing the error values for correction of subsequent measurements of similar artefacts.

公开(公告)号：US06914433B2

公开(公告)日：2005-07-05

申请号：US10482554

申请日：2002-09-09

Applicant: David A Wright ,  Antoni M Ziolkowski ,  Bruce A Hobbs

Inventor： David A Wright ,  Antoni M Ziolkowski ,  Bruce A Hobbs

IPC: G01V3/02 ,  G01V3/08

CPC classification number: G01V3/02

Abstract: The invention relates to a method of mapping subsurface resistivity contrasts by making multichannel transient electromagnetic (MTEM) measurements on or near the earth's surface using at least one source, receiving means for measuring the system response and at least one receiver for measuring the resultant earth response. All signals from the or each source-receiver pair are processed to recover the corresponding electromagnetic impulse response of the earth and such impulse responses, or any transformation of such impulse responses, are displayed to create a subsurface representation of resistivity contrasts. The invention enables subsurface fluid deposits to be located and identified and the movement of such fluids to be monitored.

Abstract translation: 本发明涉及通过使用至少一个源在地球表面上或附近进行多通道瞬时电磁（MTEM）测量来映射地下电阻率对比的方法，用于测量系统响应的接收装置和用于测量所得到的地球响应的至少一个接收器 。 来自或每个源 - 接收器对的所有信号被处理以恢复地球的对应的电磁脉冲响应，并且显示这样的脉冲响应或这种脉冲响应的任何变换以产生电阻率对比的地下表示。 本发明使得能够定位和识别地下流体沉积物以及待监测的这种流体的移动。

公开(公告)号：US06601311B2

公开(公告)日：2003-08-05

申请号：US10191460

申请日：2002-07-10

Applicant: David R McMurtry ,  Alexander T Sutherland ,  David A Wright

Inventor： David R McMurtry ,  Alexander T Sutherland ,  David A Wright

IPC: G01B2104

CPC classification number: B82Y15/00 ,  G01B21/042

Abstract: A method of calibrating a scanning system comprising a machine and a measuring probe, includes the steps of error mapping the system statically and qualifying the stylus tip so that the system will provide accurate measurements, determining the positions of a number of datum points on the surface of an artefact with the probe stylus in contact with the workpiece and at zero deflection normal to the surface, scanning the surface through the datum points at a nominal stylus deflection and at the maximum speed which provides repeatable position measurements to make a second determination of the positions of the datum points, determining the errors attributable to the scanning process by subtracting the positions obtained in the first and second determinations, and storing the error values for correction of subsequent measurements of similar artefacts.

公开(公告)号：US06580964B2

公开(公告)日：2003-06-17

申请号：US10232396

申请日：2002-09-03

Applicant: Alexander T Sutherland ,  David A Wright

Inventor： Alexander T Sutherland ,  David A Wright

IPC: G06F1900

CPC classification number: G01B21/042

Abstract: An analogue probe having a stylus with a spherical tip of radius (r) is calibrated using a sphere of known radius (R) mounted on a machine. The stylus tip is driven into the sphere from a plurality of directions (at least 9), each nominally normal to the sphere surface, until the stylus has deflected a predetermined amount. The machine movement is then reversed, and probe (a,b,c) deflection outputs are recorded simultaneously with machine (X,Y,Z) axis positions until the stylus tip leaves the surface. The readings are extrapolated to obtain the (X,Y,Z) readings when the probe radial deflection is zero. The value of (R+r) is determined from these readings along with the position of the sphere center giving a value with zero probe errors. Values of (R+r) are also determined using a pre-selected radial deflection for each of the directions, by converting probe (a,b,c) outputs at that deflection to incremental machine (X,Y,Z) axis values using a trial probe transformation matrix. The differences in (R+r) values from the value obtained by extrapolation are noted as an error in each case, and the trial probe matrix is then optimized until the errors are minimized using the transformation obtained by the calibration, the probe can be error mapped.

Abstract translation: 具有具有半径（r）的球形尖端的触针的模拟探头使用安装在机器上的已知半径（R）的球来校准。 触针尖端从标称地垂直于球体表面的多个方向（至少9个）被驱动到球体中，直到触针已偏转预定量。 然后机器运动反转，并且探头（a，b，c）偏转输出与机器（X，Y，Z）轴位置同时记录，直到触针尖离开表面。 当探头径向偏转为零时，读数被外推以获得（X，Y，Z）读数。 从这些读数中确定（R + r）的值以及球中心的位置给出具有零探头误差的值。 通过将该偏转的探头（a，b，c）输出转换为增量机器（X，Y，Z）轴的值，使用每个方向的预选径向偏转来确定（R + r）的值。 试验探针变换矩阵。 通过外推获得的值中的（R + r）值的差异在每种情况下被记作为误差，然后优化试验探针矩阵，直到使用通过校准获得的变换将误差最小化，探针可能是错误的 映射