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    • 12. 发明授权
    • Surface acoustic wave sensors
    • 表面声波传感器
    • US4586382A
    • 1986-05-06
    • US636874
    • 1984-08-01
    • Bikash K. Sinha
    • Bikash K. Sinha
    • G01L9/00G01L11/00
    • G01L9/0025Y10S73/04
    • Pressure sensing diaphragms comprise a cylindrical or spherical crystalline member in which an internal cylindrical or spherical chamber is provided. In the internally loaded embodiments, a fluid is introduced into the chamber and the pressure exerted by the fluid causes generally tensile stress in the region of the diaphragm generally about the chamber. In the externally loaded embodiments, the diaphragm is immersed within the fluid and the pressure exerted by the fluid causes generally compressive stress in the region of the diaphragm generally about the chamber. For each of the embodiments, the stresses arising cause certain mechanical and electrical properties of the crystalline material to change. The change in these properties is detected by observing the frequency behavior of one or more oscillators whose frequencies of operation are controlled by respective surface acoustic wave devices provided in the regions of elastic deformation. Many diaphragm arrangements are capable of providing temperature compensated pressure measurements. Two particularly useful orientations for the temperature compensated embodiments are the SST and ST orientations.
    • 压力感测隔膜包括圆柱形或球形结构件,其中设置有内部圆柱形或球形室。 在内部加载的实施例中,将流体引入室中,并且由流体施加的压力通常在隔膜的区域中大致围绕室引起拉伸应力。 在外部装载的实施例中,隔膜浸没在流体内,并且由流体施加的压力通常在隔膜的区域中通常围绕室引起压缩应力。 对于每个实施例,所产生的应力导致结晶材料的某些机械和电学性质改变。 通过观察一个或多个振荡器的频率特性来检测这些特性的变化,所述振荡器的频率由在弹性变形区域中提供的各声表面波装置控制。 许多隔膜装置能够提供温度补偿压力测量。 温度补偿实施例的两个特别有用的取向是SST和ST取向。
    • 13. 发明授权
    • Surface acoustic wave sensors
    • US4512198A
    • 1985-04-23
    • US636515
    • 1984-08-01
    • Bikash K. SinhaMichel Gouilloud
    • Bikash K. SinhaMichel Gouilloud
    • G01L9/00G01L9/08
    • G01L9/0025Y10S73/04
    • Pressure sensing diaphragms comprise a cylindrical or spherical crystalline member in which an internal cylindrical or spherical chamber is provided. In the internally loaded embodiments, a fluid is introduced into the chamber and the pressure exerted by the fluid causes generally tensile stress in the region of the diaphragm generally about the chamber. In the externally loaded embodiments, the diaphragm is immersed within the fluid and the pressure exerted by the fluid causes generally compressive stress in the region of the diaphragm generally about the chamber. For each of the embodiments, the stresses arising cause certain mechanical and electrical properties of the crystalline material to change. The change in these properties is detected by observing the frequency behavior of one or more oscillators whose frequencies of operation are controlled by respective surface acoustic wave devices provided in the regions of elastic deformation. Many diaphragm arrangements are capable of providing temperature compensated pressure measurements. Two particularly useful orientations for the temperature compensated embodiments are the SST and ST orientations.
    • 14. 发明授权
    • Stress-compensated quartz resonators
    • 应力补偿石英谐振器
    • US4419600A
    • 1983-12-06
    • US267507
    • 1981-05-27
    • Bikash K. Sinha
    • Bikash K. Sinha
    • H03H9/02H03H9/19H01L41/08
    • H03H9/02023H03H9/02133
    • A stress compensated thickness-shear resonator is of an orientation (yxwl) .phi./.theta. selected from loci of stress compensated orientations provided for both the fast and slow thickness-shear modes of vibration. A stress compensated orientation is used in an oscillator for stable frequency-stress behavior. A stress compensated orientation having large-valued temperature coefficients of frequency is used in a temperature sensor for precision measurements. A stress and temperature compensated orientation is used in a pressure sensor such that the temperature compensated thickness-shear mode is used for pressure measurement while the stress compensated thickness-shear mode is used to compensate for effects of temperature.
    • 应力补偿厚度剪切共振器具有从为振动的快速和慢速厚度剪切模式提供的应力补偿取向的位置选择的取向(yxwl)phi /θ。 在振荡器中使用应力补偿取向用于稳定的频率 - 应力行为。 在温度传感器中使用具有大值频率的温度系数的应力补偿取向用于精确测量。 应力和温度补偿取向用于压力传感器,使得温度补偿厚度剪切模式用于压力测量,而应力补偿厚度 - 剪切模式用于补偿温度的影响。
    • 19. 发明授权
    • Determination of dipole shear anisotropy of earth formations
    • 测定地球地层的偶极剪切各向异性
    • US06718266B1
    • 2004-04-06
    • US10284612
    • 2002-10-31
    • Bikash K. SinhaSandip BoseXiaojun Huang
    • Bikash K. SinhaSandip BoseXiaojun Huang
    • G01V128
    • G01V1/48
    • A method for determining formation shear slowness of formations surrounding an earth borehole that includes: transmitting sonic energy into the formations from a dipole source in the borehole; measuring signals from orthogonal wave components that have traveled through the formations at each of a plurality of receiver locations in the borehole, spaced at a respective plurality of distances from the transmitter location; transforming the signals to the frequency domain and separating dispersive and non-dispersive portions of the transformed signals; and determining fast and slow shear slowness of the formation from the low frequency asymptotes of the dispersive portions of the transformed signals. Related methods for determining shear directionality and the magnitude of anisotropy of anisotropic formations surrounding an earth borehole and associated apparatus are also described.
    • 确定地球钻孔周围地层形成剪切慢度的方法,其包括:将声能从井眼中的偶极源传播到地层中; 测量来自在穿过钻孔中的多个接收器位置中的每一个处的地层的正交波分量的信号,其间隔距离发射机位置相应的多个距离; 将信号变换到频域并分离变换信号的色散和非色散部分; 以及从变换信号的色散部分的低频渐近线确定地层的快速和慢剪切慢度。 还描述了用于确定剪切方向性和围绕地球钻孔及相关联装置的各向异性形状的各向异性的大小的相关方法。
    • 20. 发明授权
    • System and method for estimating subsurface principal stresses from seismic reflection data
    • 用于从地震反射数据估计地下主应力的系统和方法
    • US06714873B2
    • 2004-03-30
    • US10023293
    • 2001-12-17
    • Andrey BakulinBikash K. SinhaRomain Charles Andre Prioul
    • Andrey BakulinBikash K. SinhaRomain Charles Andre Prioul
    • G01V100
    • G01V1/30
    • A method and system is described for estimating stress characteristics from seismic data. The method includes receiving seismic data acquired over a region, receiving properties of rock at a location within the region, and estimating one or more stress characteristics for a sub-region by combining the seismic data and the rock properties using a relationship between the stress characteristics in the sub-region and elastic stiffness and/or sonic velocity in the sub-region. The relationship is based on a non-linear elasticity theory. The described system and method also includes analyzing in the seismic data azimuth and offset dependence of seismic signatures for seismic anisotropy thereby determining a set of anisotropic coefficients; identifying directions of minimum, intermediate and maximum stresses from orientation of principal axes of seismic anisotropy and signs of the anisotropic coefficients; and inverting the anisotropic coefficients thereby estimating magnitudes of principal stresses in the sub-region using non-linear elastic constants and vertical total stress information derived from the rock properties.
    • 描述了一种用于从地震数据估计应力特征的方法和系统。 该方法包括接收在一个区域上获取的地震数据,接收该区域内某一位置的岩石的性质,以及通过使用该地震数据和岩石性质之间的关系来估计一个或多个亚区域的应力特性 在子区域中的弹性刚度和/或声子速度。 关系是基于非线性弹性理论。 所描述的系统和方法还包括分析地震数据的方位角和偏移相关性的地震各向异性,从而确定一组各向异性系数; 识别地震各向异性主轴方向的最小,中等和最大应力方向以及各向异性系数的符号; 并且反转各向异性系数,从而使用从岩石性质导出的非线性弹性常数和垂直总应力信息来估计子区域中的主应力的大小。