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- acoustic velocity logging 声速测井
- Based on the analysis of logging data, i t is found that effect of porosity and s hale content on acoustic velocity is hea vier than that of water saturation on it . 根据对实测测井解释资料的分析,认为孔隙度和泥质含量对纵波声速的影响大于含水饱和度的影响。
- It is an effective way in integrated navigation by using Strapdown Inertial Navigation System(SINS),GPS and Doppler Velocity Log(DVL). 利用捷联惯导(SINS)、GPS定位系统和多普勒计程仪(DVL)进行组合导航是水下运载器导航定位的有效方式。
- In all these methods, acoustic velocity thermometry based on the acoustic travel time is a better one with a wider use. 而在声学测温的各种方法中,基于声波传播时间的声速测温方法又是一种比较好的、应用更广泛的方法。
- The Doppler Velocity Log(DVL) simulation system for the underwater vehicle has been built in this paper. 本文建立了水下机器人的多普勒测速声纳仿真系统。
- In all these methods,acoustic velocity thermometry based on the acoustic travel time is a better one with a wider use. 而在声学测温的各种方法中,基于声波传播时间的声速测温方法又是一种比较好的、应用更广泛的方法。
- The diameter of blowdown stand pipe is designed taking 0.5 times of acoustic velocity at the pipe mouth. 按照放空气体管口流速为0.5倍音速设计放空立管直径,根据火炬热辐射强度对不同环境的影响设计放空立管高度。
- Compared to doppler velocity log for the same depth of water, it enables the use of smaller transducer and smaller transmitting power. 在相同的工作深度要求下与多普勒计程仪比较,声相关计程仪可以利用较小的换能器和以较小的功率发射信号。
- The linear relationship between the nodularity and acoustic velocity has been accepted. 球墨铸铁的球化率随超声声速的线性变化关系已经被人们所认同。
- And the way overcomes the defects of the measuring accuracy of the traditional measuring instruments affected by the change of acoustic velocity. 并根据水声信道中多途效应时延估计模型,利用时延估计技术和互相关运算进行了计算机模拟。
- A comparision was made between Doppler Velocity Log (DVL)and Correlation Velocity Log (CVL)in their suitability for AUV.It is obvious that CVL is suitable. 本文从多普勒速度计程仪(DVL)和相关速度计程仪(CVL)两种速度传感器的工作机理出发,找出了CVL系统的独特优点,以此为AUV导航用速度传感器采用CVL方案的依据。
- The acoustic velocity, compressive strength and the Young's modulus of the rock samples under different conditions were obtained. 利用回归分析法,建立了5种岩石的力学性质和声学性质随围压变化的数学模型。
- Phased-array Doppler Velocity Log put forward in this paper adopt Phased-array technique to form several symmetrical beams for the transceiver, overcoming such defects ultimately. 本文提出的相控阵多普勒速度计程仪克服了以上缺点,采用相控技术形成多个对称波束。
- Velocity is one of the important acustic parameters of liquid. Ultrasonic-pulse reflection method is a suited technique of measring the acoustic velocity of liquid. 液体声速是液体声学的重要参数之一 ,获得液体声速常用的方法是脉冲反射法 ,文章提出一种新的测量方法 ,即共振声谱法。
- The ray-parameter method for acoustic velocity measurements of sediment layers presented by Bryan has been extended to the case of layers having a common dip-angle. Bryan提出的测量海底沉积层连的射线参数法可以推广到平行倾斜情况下使用。
- Because there are many influential factors in experiment of acoustic velocity testing of unconsolidated sandstone, quantitative study is short of the influential factors. 摘要由于疏松砂岩声波纵、横波速度的影响因素较多,因此有必要对各影响因素进行定量研究。
- A revising method is proposed,in which the velocity of Doppler velocity log(DVL) is used to aid the alignment of strap-down inertial navigation system with DVL and the integrated navigation based Kalman filter. 提出了利用多普勒测速仪辅助捷联惯导系统动基座对准以及基于卡尔曼滤波的组合导航方案;并对该导航方案水上实验的结果进行了分析.
- The study mainly deals with the combined arithmetic of Integrated Navigation System which takes the Strapdown Inertial Navigation System(SINS)/Global Position System(GPS)/DoppIer Velocity Log(DVL) integrated navigation system as example. 本课题主要通过捷联惯导(SINS)、全球定位系统(GPS)和多普勒计程仪(DVL)组合导航系统对组合导航算法进行了研究。 论文的主要工作有:
- The results of well-to-seismic calibration are effective by selecting Permian igneous rock and Carboniferous double-peak limestone as the reference layers, adjusting appropriately acoustic velocity and choosing the most suitable wavelet. 利用上述方法,以哈得四油田二叠系火成岩及石炭系双峰灰岩为参考层,选取与研究区地震数据吻合性最好的子波,合理地调整声波速度,对哈得四油田的主要储层东河砂岩进行井-震标定,获得了较为理想的效果。
- three-dimensional velocity logging 三维测井