公开(公告)号：EP3304096A1

公开(公告)日：2018-04-11

申请号：EP16745812.4

申请日：2016-05-27

申请人： Area Prefabbricati S.P.A.

发明人： MANFREDINI, Emanuel

IPC分类号： G01P21/00 ,  G01V1/16 ,  G01H1/00 ,  G01M5/00

CPC分类号： G01V1/164 ,  G01P21/00 ,  G01V1/18 ,  G01V1/181 ,  G01V1/22 ,  G01V1/362 ,  G01V2200/12 ,  G01V2200/14 ,  G01V2210/1232

摘要： The invention falls within the field of the techniques for manufacturing seismic monitoring systems and is applicable to structures related to civil engineering. The accelerometric sensor comprises - one or more accelerometers (2a, 2b); - a main microprocessor (7); - a control microprocessor (8); - a temperature sensor (3); - a CAN bus driver (4); - two connectors (5), one input and one output, of a CAN bus line; - an input clock circuit (11); - an error signaling circuit (10); - a power supply unit (9); - a container element (12), which at its interior contains the above components.

公开(公告)号：EP2990832A1

公开(公告)日：2016-03-02

申请号：EP14306340.2

申请日：2014-08-29

申请人： Sercel

发明人： Laine, Jérôme

IPC分类号： G01V1/24

CPC分类号： G01V1/223 ,  G01S19/14 ,  G01V1/003 ,  G01V1/18 ,  G01V1/24 ,  G01V2200/12

摘要： It is proposed a data acquisition apparatus (1), comprising:
- a receiving antenna (63), receiving a radio communication signal including synchronization information representative of a remote reference clock signal;
- a local clock circuit (8), delivering a local clock signal (CLK);
- a gauging circuit (61), measuring a frequency drift and a phase error of the local clock signal (CLK) in view of the synchronization information;
- an analog-to-digital converter (3), providing a series of digital sampled and dated data according to the local clock signal (CLK); and
- a correcting circuit (4), correcting the series of digital sampled and dated data based at least on the measured frequency drift and phase error.

摘要翻译： 提出了一种数据采集装置（1），包括： - 接收天线（63），接收包括表示远程参考时钟信号的同步信息的无线电通信信号; - 本地时钟电路（8），传送本地时钟信号（CLK）; - 测量电路（61），考虑同步信息测量本地时钟信号（CLK）的频率漂移和相位误差; - 模数转换器（3），根据本地时钟信号（CLK）提供一系列数字采样和日期数据; 以及 - 校正电路（4），至少基于所测量的频率漂移和相位误差来校正所述一系列数字采样和日期数据。

公开(公告)号：EP2902814A2

公开(公告)日：2015-08-05

申请号：EP15153855.0

申请日：2015-02-04

申请人： Services Petroliers Schlumberger ,  Schlumberger Holdings Limited ,  SCHLUMBERGER TECHNOLOGY B.V.

发明人： Narasimhan, Bharat ,  Fredette, Mark A. ,  Gadot, Raphael ,  Hutin, Remi ,  Conn, David Kirk

IPC分类号： G01V11/00

CPC分类号： E21B45/00 ,  E21B47/01 ,  E21B47/12 ,  E21B47/124 ,  G01V11/002 ,  G01V2200/12 ,  G01V2200/16

摘要： A well-logging system may include a tool assembly to be positioned within a borehole of a subterranean formation and to store second data including a second time marker related to a first time marker. The well-logging system may include a controller above the subterranean formation. The controller may process first data including the first time marker, recover the second data, and synchronize the second data based upon the second time marker and the first time marker.

摘要翻译： 测井系统可以包括工具组件，其被定位在地层的钻孔内并且存储包括与第一时间标记相关的第二时间标记的第二数据。 测井系统可以包括地下地层以上的控制器。 控制器可以处理包括第一时间标记的第一数据，恢复第二数据，并且基于第二时间标记和第一时间标记来同步第二数据。

公开(公告)号：EP2198325A4

公开(公告)日：2015-04-08

申请号：EP08852981

申请日：2008-11-04

申请人： FAIRFIELD IND INC

发明人： RAY CLIFORD H ,  FISSELER GLENN D ,  GUYTON WILLIAM

IPC分类号： G01V1/24

CPC分类号： G01V13/00 ,  G01C9/00 ,  G01V1/00 ,  G01V1/24 ,  G01V1/36 ,  G01V2200/12

摘要： A wireless seismic data acquisition unit with a wireless receiver providing access to a common remote time reference shared by a plurality of wireless seismic data acquisition units in a seismic system. The receiver is capable of replicating local version of remote time epoch to which a seismic sensor analog-to-digital converter is synchronized. The receiver is capable of replicating local version of remote common time reference for the purpose of time stamping local node events. The receiver is capable of being placed in a low power, non-operational state over periods of time during which the seismic data acquisition unit continues to record seismic data, thus conserving unit battery power. The system implements a method to correct the local time clock based on intermittent access to the common remote time reference. The method corrects the local time clock via a voltage controlled oscillator to account for environmentally induced timing errors. The invention further provides for a more stable method of correcting drift in the local time clock.

公开(公告)号：EP2813002A1

公开(公告)日：2014-12-17

申请号：EP13746252.9

申请日：2013-02-08

申请人： Inova Ltd.

发明人： PHILLIPS, Thomas ,  MAECHLER, Bernard ,  RADCLIFFE, Keith ,  SAMOYLOV, Igor

IPC分类号： H04B7/00

CPC分类号： G01V1/06 ,  G01V1/003 ,  G01V2200/12

摘要： A method of controlling seismic data acquisition includes synchronizing a sampling rate of at least one node configured to acquire seismic data with a GPS timing signal from a first GPS seismic device; and delaying sending a start signal to one or more seismic sources, the delay being with reference to a GPS timing signal from a second GPS device.

公开(公告)号：EP3090498B1

公开(公告)日：2018-12-26

申请号：EP15733115.8

申请日：2015-01-02

申请人： TrackServer, Inc.

发明人： CROWELL, Jonathan, C.

IPC分类号： H04B13/02 ,  G01V1/38

CPC分类号： G04C11/00 ,  G01S19/13 ,  G01V1/3852 ,  G01V2200/12 ,  G04G7/00 ,  H04B10/80 ,  H04B11/00 ,  H04B13/02 ,  H04L7/0075

摘要： Methods and systems for synchronizing clocks used in underwater devices is described. All clocks have some drift due to frequency accuracy and this disclosure provides a method for periodically synchronizing clocks to an accurate master clock to remove long term drift. A synchronization device can use an accurate clock and hardware to transmit both a sound wave and light pulse at the same point in time. Remote slave clocks can detect the light first, and later the sound, allowing them to calculate the distance the pulse had to travel. The clocks can then synchronize their time to the master clock canceling out any drift. The synchronization device can be packaged in a waterproof housing and can be moved around on a periodic basis between the clock on an underwater robot or any other means.

公开(公告)号：EP3362642A1

公开(公告)日：2018-08-22

申请号：EP15910929.7

申请日：2015-12-17

申请人： Halliburton Energy Services, Inc.

发明人： COOPER, Paul Andrew ,  CHENG, Arthur Chuen Hon

IPC分类号： E21B47/00 ,  E21B47/12 ,  E21B47/16

CPC分类号： E21B47/12 ,  G01V1/22 ,  G01V1/46 ,  G01V2200/12 ,  G01V2200/16 ,  H04L7/0008

摘要： A method for logging a wellbore includes positioning a downhole tool having a downhole clock in the wellbore, logging the wellbore with the downhole tool, transmitting a surface signal from a wellbore surface to the downhole tool, and receiving the surface signal at the downhole tool. The method also includes transmitting a downhole signal from the downhole tool to the surface, receiving the downhole signal at the wellbore surface, and determining clock drift based on an arrival time of the surface signal at the downhole tool and an arrival time of the downhole signal at the wellbore surface.

公开(公告)号：EP2693234A3

公开(公告)日：2017-11-15

申请号：EP13178792.1

申请日：2013-07-31

申请人： CGG Services SA

发明人： Ni, Yuan ,  Siliqi, Risto ,  Niang, Cheikh

IPC分类号： G01V1/08 ,  G01V1/38

CPC分类号： G01V1/3808 ,  G01V1/08 ,  G01V2200/12

摘要： A method controls a delay of an air-gun (310) in an aquatic seismic source (300) during an aquatic seismic survey. The method includes a step of receiving an attribute of the air-gun (310) during the aquatic seismic survey, wherein the attribute is indicative of an asynchronization time of the air-gun (310); a step of calculating, based on a time-delay algorithm that uses the attribute, the asynchronization time of the air-gun (310), wherein the asynchronization time is a time difference between (i) a desired time when the air-gun (310) is expected to fire and (ii) an actual time when the air-gun (310) actually fires; a step of determining whether the asynchronization time is smaller than a given time threshold; a step of instructing a controller (340) to (1) wait for a predetermined time before calculating again the asynchronization time of the air-gun (310) if the asynchronization time is smaller than the given time threshold, or (2) calculate an updated asynchronization time for the air-gun (310) based on the attribute if the asynchronization time is larger than the given time threshold; and a step of sending the updated asynchronization time to a gun controller (360) of the air-gun (310) for adjusting a delay time for firing the air-gun (310).

摘要翻译： 一种方法在水上地震勘测期间控制水生地震源（300）中的气枪（310）的延迟。 所述方法包括在所述水上地震勘测期间接收所述气枪（310）的属性的步骤，其中所述属性指示所述气枪（310）的不同步时间; 基于使用所述属性的时间延迟算法，计算所述气枪（310）的异步时间的步骤，其中，所述异步时间是（i）所述气枪（310）的期望时间与所述气枪 310）预计会发射并且（ii）气枪（310）实际发射的实际时间; 确定异步时间是否小于给定时间阈值的步骤; 在不同步时间小于给定时间阈值的情况下再次计算气枪（310）的异步时间之前，指示控制器（340）等待预定时间，或者（2）计算 如果所述异步时间大于所述给定时间阈值，则基于所述属性更新所述气枪（310）的不同步时间; 以及将更新的异步时间发送到气枪（310）的枪控制器（360）以调整用于发射气枪（310）的延迟时间的步骤。

公开(公告)号：EP2418585A4

公开(公告)日：2017-09-13

申请号：EP10761667

申请日：2010-04-05

申请人： OMRON TATEISI ELECTRONICS CO ,  UNIV TOKYO

发明人： NAITO TAKESHI ,  KAMIJO SHUNSUKE ,  FUJIMURA KAICHI

IPC分类号： G06F13/00 ,  G04G5/00 ,  G04G7/00 ,  G06F1/14

CPC分类号： G04G7/00 ,  G01V1/22 ,  G01V2200/12 ,  G04G5/00 ,  G06F1/14

摘要： A network system capable of suppressing system scale is provided and such a system can be used even for an ad-hoc type system. The network system enables synchronization of a sensor node 1 with other sensor nodes 1 in measured time. Each sensor node 1 uses time-series data that is repeatedly transferred among the sensor nodes 1 existing on the network to calculate an average time measured by timers 14 of other sensor nodes 1 existing on the network and sets the time of the timer 14 of the own sensor node 1 to the average time.

摘要翻译： 提供了一种能够抑制系统规模的网络系统，并且这种系统甚至可以用于ad-hoc型系统。 网络系统能够在测量时间内使传感器节点1与其他传感器节点1同步。 每个传感器节点1使用在网络上存在的传感器节点1之间重复传送的时间序列数据来计算由网络上存在的其他传感器节点1的计时器14测量的平均时间，并将计时器14的时间设置为 自己的传感器节点1到平均时间。

公开(公告)号：EP2856214A1

公开(公告)日：2015-04-08

申请号：EP13801168.9

申请日：2013-06-04

申请人： Fairfield Industries Incorporated

发明人： CRAFT, Kenneth ,  UDENGAARD, Carsten

IPC分类号： G01V1/38 ,  G01V1/36

CPC分类号： G01V1/38 ,  G01V1/36 ,  G01V1/3817 ,  G01V1/3835 ,  G01V2200/12 ,  G01V2200/14

摘要： The present invention permits RMS traveltime error in a seismic data acquisition to be minimized. Field measurements of source and receiver coordinates, speed of sound in water as a function of depth and time, receiver timing, and clock drift are first collected. The seismic data is then examined to measure travel time from each source to each reciever. A model travel time can then be computed based on the field measurements. By iteratively perturbing at least one of the field measured data using a look-up table and calculating the travel time after each perturbation until an acceptable RMS error has been achieved, conditioned seismic data that takes into account the dynamic nature of the water column will provide the basis for creating an accurate seismic map that is unaffected by the changing water conditions.