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    DEVICE FOR MEASURING GRAVITATIONAL ACCELERATION DURING STATE OF SPINNING AND EXTRACTION METHOD
    1.
    发明公开
    DEVICE FOR MEASURING GRAVITATIONAL ACCELERATION DURING STATE OF SPINNING AND EXTRACTION METHOD 审中-公开
    用于测量纺丝和萃取方法状态下引力加速度的装置

    公开(公告)号：EP3312382A1

    公开(公告)日：2018-04-25

    申请号：EP16888601.8

    申请日：2016-11-12

    申请人： Institute of Geology and Geophysics, Chinese Academy of Sciences

    发明人： ZHANG, Wenxiu ,  CHEN, Wenxuan ,  DI, Qingyun ,  LIU, Jianguang ,  SUN, Yuntao ,  YANG, Yongyou ,  ZHENG, Jian

    IPC分类号： E21B47/022 ,  E21B47/024 ,  G01C21/16 ,  G01P15/18

    摘要： The present invention provides a gravity acceleration measurement apparatus and extraction method in a rotating state. The apparatus comprises sensors and a measurement circuit, the sensors comprise a three-axis gravity accelerometer, a reference measurement sensor and a temperature sensor, the three-axis gravity accelerometer measures acceleration component signals in three mutually orthogonal directions, and the reference measurement sensor generates a signal that varies with rotation and is not affected by vibration or shock to serve as a reference signal; the temperature sensor measures the temperature in the apparatus and is used for compensating the temperature effect of the gravity accelerometers; and the measurement circuit acquires output signals of the sensors, respectively performs cross-correlation processing on the accelerometer components by using the reference signal to extract gravity acceleration signals so as to eliminate centrifugal acceleration, vibration, shock and other interferences generated by rotation, and the non-interference gravity acceleration signals are obtained according to the measurement method which can be used for calculating an inclination angle and a toolface angle of a drilling tool in the rotating state.

    摘要翻译： 本发明提供了一种旋转状态下的重力加速度测量装置和抽取方法。 该装置包括传感器和测量电路，传感器包括三轴重力加速度计，参考测量传感器和温度传感器，三轴重力加速度计在三个相互正交的方向上测量加速度分量信号，参考测量传感器产生 一个随旋转而变化并且不受振动或冲击影响的信号作为参考信号; 温度传感器测量设备中的温度并用于补偿重力加速度计的温度效应; 测量电路获取传感器的输出信号，利用该参考信号分别对加速度计部件进行互相关处理，提取重力加速度信号，消除由于旋转而产生的离心加速度，振动，冲击等干扰， 根据可用于计算旋转状态下的钻具的倾斜角度和工具面角度的测量方法获得非干扰重力加速度信号。