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41. 发明公开

EP1474734A2 DIGITAL PHASE-QUADRATURE OSCILLATOR 有权
标题翻译：数字相位四通道振荡器
公开(公告)号：EP1474734A2
公开(公告)日：2004-11-10
申请号：EP03709935.5
申请日：2003-02-14
申请人： RADIODETECTION LIMITED
发明人： Royle, John Mark
IPC分类号： G06F1/02
CPC分类号： G06F1/022 , G06F2101/04
摘要： A digital phase-quadrature oscillator generates a series of sine values representative of a sine wave, and a series of cosine values representative of a cosine wave. In each iteration of the oscillator, a sum of the squares of past sine and cosine values is used as a negative feedback term in synthesizing next sine and cosine values, in order to stabilize the amplitudes of the sine and cosine values.
摘要翻译：数字相位正交振荡器产生表示正弦波的一系列正弦值和表示余弦波的一系列余弦值。在振荡器的每次迭代中，为了稳定正弦值和余弦值的幅度，将过去的正弦值和余弦值的平方和用作合成下一个正弦值和余弦值的负反馈项。

42. 发明公开

EP1321779A3 Locating device 失效
标题翻译：检测系统
公开(公告)号：EP1321779A3
公开(公告)日：2004-03-24
申请号：EP03075551.6
申请日：1995-04-13
申请人： RADIODETECTION LIMITED
发明人： Haddy, Alan
IPC分类号： G01V11/00 , G01V3/15 , G01C21/00 , G09B29/10
CPC分类号： G01V3/15
摘要： A locating device is disclosed which includes: positional data receiving means (6) for receiving data relating to the geographical position of the locating device; data storage means (12) for storing data relating to the position of the underground object (16); means for comparing the stored data with the positional data; and means for producing a warning signal when said means for comparing indicates that the underground object is within a predetermined distance of the locating device. In this way the geographical positional data is stored relating to the location of the underground cable, and is retrieved for relocation of the cable.

43. 发明授权

EP0995134B1 LOCATING CONCEALED CONDUCTORS 失效
标题翻译：地下管线的本地化
公开(公告)号：EP0995134B1
公开(公告)日：2004-02-25
申请号：EP98935144.0
申请日：1998-07-16
申请人： RADIODETECTION LIMITED
发明人： LEWIS, Andrew, Biggerstaff , FROST, Nicholas, James
IPC分类号： G01V3/10
CPC分类号： G01V3/08
摘要： A method of locating a concealed conductor is performed by generating a magnetic field with a direction in which the field is a maximum. The magnetic field is rotated until that direction is directed towards the conductor. In this way, a signal is induced in the conductor which has a maximum value when that direction is directed towards the conductor. The induced signal is detected in the conductor, using a detector arranged to determine the direction of the conductor relative to the detector. The detector detects when the induced signal has the maximum value.

44. 发明授权

EP0769153B1 IDENTIFICATION OF BURIED CABLES 有权
标题翻译：埋地电缆的识别
公开(公告)号：EP0769153B1
公开(公告)日：1999-07-07
申请号：EP95925938.3
申请日：1995-07-21
申请人： RADIODETECTION LIMITED
发明人： LEWIS, Andrew, Biggerstaff
IPC分类号： G01V3/06
CPC分类号： G01V3/06
摘要： In order to identify a cable (10) buried underground, a very low or zero frequency voltage signal is applied to the cable (10) and an electric field sensor (18) is brought into proximity with the cable (10). The sensor (18) thus detects the voltage signal on the cable (10) and so identifies the cable. The sensor (18) is unaffected by the cable (26) carrying voltage signals, which are proximate the cable (18) of interest, as the electric filters from such cables (26) do not pass to the cable (18) of interest. The sensor (18) is mounted on a probe (16) which is mounted into a bore (20) in the soil (22) around the cable (10). The probe (16) may also carry a magnetometer (30) for detecting magnetic fields generated by low frequency alternating current signals on the cable (10).

45. 发明公开

EP0815472A1 LOCATING OBJECTS 失效
标题翻译：定位对象
公开(公告)号：EP0815472A1
公开(公告)日：1998-01-07
申请号：EP96907586.0
申请日：1996-03-19
申请人： RADIODETECTION LIMITED
发明人： SMITH, Royston
IPC分类号： G01V3 , G01V15
CPC分类号： G01V15/00 , G01V3/081
摘要： In order to locate an inaccessible object, such as an underground boring tool (30), a solenoid (10) on or in the tool generates a magnetic field which is detected at two measuring locations (20, 21). Information relating to the relationship between the axial and radial components of the field from the solenoid (10) are stored, and comparison of the measured values of the axial and radial components at the measurement locations (20, 21) enables the direction of the solenoid (10) from the measurement locations (20, 21) to be determined. The known attenuation of the magnetic field from the solenoid (10) enables the distance between the solenoid (10) and the measurement locations to be determined from the absolute value of the field at the measurement locations (20, 21) and the direction to the solenoid (10). The present invention thus makes use of the fact that there is a known relationship between the axial and radial fields of the solenoid (10) at any point in the plane containing the solenoid and the line joining the measurement location to the solenoid. A tilt sensor may be provided to indicate if the axis of the solenoid is not horizontal, to enable axial radial directions to be determined.

46. 发明公开

EP0611440A1 INDUCTIVE ANGULAR DISPLACEMENT SENSOR 失效
标题翻译：电感式角度传感器位移。
公开(公告)号：EP0611440A1
公开(公告)日：1994-08-24
申请号：EP92922286.0
申请日：1992-11-04
申请人： RADIODETECTION LIMITED
发明人： HORE, Donald, Lionel , SLADE, Robert, Andrew 5 Hill Court
IPC分类号： G01D5
CPC分类号： G01D5/2216 , G01D5/2013
摘要： Un détecteur de déplacement angulaire, applicable à des angles de rotation limités (par exemple, pour détecter la position d'un régulateur automobile), comprend un premier (14) et un second (16) composant rotatifs l'un par rapport à l'autre, et disposés axialement l'un en face de l'autre; le premier composant (14) comporte plusieurs pôles (14A, B, C) qui sont positionnés angulairement autour de l'axe de rotation et s'étendent en direction du second composant, lesdits pôles (14A, B, C) ont des axes s'étendant dans la même direction que l'axe de rotation. Quelques pôles comportent des enroulements (14A, B) tandis que d'autres (14C) servent de chemin de retour au flux. Les seconds composants comportent un composant affectant l'inductance qui recouvre seulement quelques uns des pôles à enroulement, en tout temps, la rotation relative faisant varier les pôles qui sont recouverts. Le détecteur comprend un dispositif qui fournit un signal de sortie en relation avec les inductances des pôles excités et donc en relation avec la configuration circulaire des composants.

47. 发明授权

EP0438490B1 HOMOPOLAR INDUCTIVE DISPLACEMENT SENSOR 失效
标题翻译：同杆电感式传感器SHIFT。
公开(公告)号：EP0438490B1
公开(公告)日：1994-08-03
申请号：EP89911846.7
申请日：1989-10-11
申请人： RADIODETECTION LIMITED
发明人： HORE, Donald, Lionel
IPC分类号： G01D5/20 , G01C9/06
CPC分类号： G01C9/06 , G01D5/2013
摘要： Displacement along a linear or rotary path causes relative displacement of a pair of elements (101, 102) that confront each other across the path. One element (101) provides a series of coil portions (AB, BC), while the other (102) has a portion which increases the inductance of the fraction of the coil portions that it lies adjacent at any instant. The coil portions are homopolar. Typically each coil portion has an axis which intersects the path, and all are wound in the same sense about their axes. They are generally connected in series as a single winding on a core (101). The core has unwound portions (104) for providing a flux return path.

48. 发明公开

EP0590830A1 Inclination angle sensing 失效
标题翻译： Neigungswinkelbestimmung。
公开(公告)号：EP0590830A1
公开(公告)日：1994-04-06
申请号：EP93307306.6
申请日：1993-09-16
申请人： RADIODETECTION LIMITED
发明人： Hore, Donald Lionel
IPC分类号： G01C9/06 , G01C9/20 , G01D5/22
CPC分类号： G01C9/06 , G01C9/20 , G01D5/2216
摘要： An elongate vessel (1), preferably cylindrical, is partially filled with a conductive and/or ferromagnetic fluid (2). At least two coils (3) are wound on the vessel in longitudinally different regions so that tilting the vessel varies the amount of the fluid inside the coils differently. This affects their inductances. The variation in inductances is monitored, directly or indirectly, e.g. by applying an AC signal to the coils and monitoring the voltage drops across them. This provides an electrical output related to the inclination of the sensor's axis. It is unaffected by rotation about the axis. Thus the sensor can be used to monitor the orientation of the axis of a drilling tool, e.g. a mole (100), which rotates about its axis.
摘要翻译：细长容器（1），优选圆柱形，部分地填充有导电和/或铁磁流体（2）。至少两个线圈（3）在纵向不同的区域中缠绕在容器上，使得容器倾斜不同地改变线圈内的流体的量。这会影响其电感。电感的变化被直接或间接地监测，例如，通过向线圈施加AC信号并监测它们之间的电压降。这提供了与传感器轴的倾斜度相关的电输出。它不受轴的旋转的影响。因此，传感器可用于监测钻具的轴线的取向，例如，一个绕其轴旋转的摩擦（100）。

49. 发明公开

EP3052972A2 VALIDATING OPERATION OF AN ELECTRONIC MARKER LOCATOR 有权
标题翻译：验证操作的电子标记在
公开(公告)号：EP3052972A2
公开(公告)日：2016-08-10
申请号：EP14821842.3
申请日：2014-10-03
申请人： RADIODETECTION LIMITED
发明人： LONGLEY, Timothy , PEARSON, Richard David
IPC分类号： G01V15/00 , G01V3/10 , G01V3/15 , G01V13/00
CPC分类号： G01V15/00 , G01V3/104 , G01V3/15 , G01V13/00
摘要： A locator for locating a buried electromagnetic marker is operable to generate a test signal in order to validate that the locator is operating in accordance with calibration data. The locator comprises a transmission antenna and a first reception antenna. The transmission antenna is configured to generate a first oscillatory magnetic field to couple with an electromagnetic marker and the first reception antenna is configured to receive an oscillatory magnetic field emitted by the electromagnetic marker. In order to validate the operation of the locator, the transmission antenna is configured to generate a test oscillatory magnetic field, and the first reception antenna is configured to receive the test oscillatory magnetic field and thereby generate a first detected test signal.

50. 发明授权

EP1907886B1 A METHOD OF AND APPARATUS FOR DETECTING A CURRENT CARRYING CONDUCTOR 有权
标题翻译：方法和设备，电力先行印刷头的检测
公开(公告)号：EP1907886B1
公开(公告)日：2014-12-31
申请号：EP06744102.2
申请日：2006-06-06
申请人： RADIODETECTION LIMITED
发明人： BENZIE, Steve , PEARSON, Richard
IPC分类号： G01V3/08
CPC分类号： G01V3/081

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