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DWJ-1A型微机激电仪是一种由微处理机控制的智能式专用电法仪器。它是在目前国内推广使用的DWJ-1型微机激电仪的基础上,对其硬、软件进行了较大改进而生产的。现有测量参数:自然电位、一次电位、极化率及二次电位放电曲线。 相似文献
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时域激电仪主要是研究观测与衰减过程有关的激电参数,如:M积分,L积分,区间平均值△,视极化率η_s以及衰减时T(B)等。为了获得更多的与△V_2衰减有关的信息,通常采用多道测量。短延时多道测量可以研究△V_2衰减过程的早、中、晚期特性,尤期以研究早期特性更为重要。这样就需要仪器有很好的暂态响应性能。 相似文献
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仿真技术可在物探仪器的设计、评价和优化中发挥重要作用,可降低仪器开发的风险、周期和成本。以MATLAB的SIMULINK作为仿真工具,对在我国取得广泛应用的双频激电仪建立了仿真模型。分析了双频激电仪的动态响应过程,给出了仪器各部分从启动到进入稳定状态的输出波形。在已知参数的激电模型上,频散率在其仿真结果与模型理论值之间的绝对误差为0.11%,这说明双频激电仪的仿真模型是可行的。仿真结果表明:在开始的几个低频周期中,仪器的观测值比真实值要小,其差距随着时间的延长也在快速变小。在七个低频周期后,仪器已无法分辩测量值与真实值之间的差异。 相似文献
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双频激电法的应用效果 总被引:1,自引:0,他引:1
直流激发极化法是寻找金属硫化物矿床及矿化带的一种有效方法.但由于装备笨重,加之云南地处高原,地形切割,大部分地区接地电阻较大,常常需要几十甚至百余只一米多长的铁棒作供电电极,△V_2也只有1毫伏左右.所以,直流激电法在云南各地的应用受到限制.我队在中南矿冶学院的帮助下,组装了一套用于交流激电法的双频道数字激电仪(简称双频仪).这种仪器与一般的交流激电仪不同,不是分别而是同时供以两个不同的频率(f_1=0.3赫,f_2=3.9赫)的电流,接收机相应地同时测得两种频率电流 相似文献
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Lin Jun 《吉林大学学报(地球科学版)》1989,(4)
本文根据最新发展的个人仪器理论,讨论了在微机地学仪器设计中如何利用软件算法消除测量误差,实现传感器的非线性校正、数据平滑、信号分析与信息变换等方法技术,某些方法技术引用了笔者的微机地学仪器设计实例加以说明。 相似文献
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微机化地面γ能谱仪及其初步应用 总被引:1,自引:0,他引:1
本文针对目前地面γ能谱仪功能差,不能及时给出数据和有关图件,调节困难、操作复杂、用附加放射性参考源稳谱等缺点,提出了采用PC-1500袖珍计算机系统的微机化地面γ能谱仪。实现了野外地面γ能谱测量的数据采集和记录、数据打印与绘图、数据存储与传送的一体化。试验表明,该机操作方便,掌握容易,工作效率高,资料获取快,能够快速提供有关地质情况,适用于野外地面γ能谱测量。 相似文献
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V. A. Hagen-Thorn V. M. Larionov D. A. Morozova A. A. Arkharov E. I. Hagen-Thorn E. S. Shablovinskaya M. S. Prokop’eva V. A. Yakovleva 《Astronomy Reports》2018,62(2):103-115
The results of optical, radio, and gamma-ray observations of the blazar AO 0235+16 are presented, including photometric (BV RIJHK) and polarimetric (R)monitoring carried out at St. Petersburg State University and the Central (Pulkovo) Astronomical Observatory in 2007–2015, 43 GHz Very Long Baseline Interferometry radio observations processed at Boston University, and a gamma-ray light curve based on observationswith the Fermi space observatory are presented. Two strong outbursts were detected. The relative spectral energy distributions of the variable components responsible for the outbursts are determined; these follow power laws, but with different spectral indices. The degree of polarization was high in both outbursts; only an average relationship between the brightness and polarization can be found. There was no time lag between the variations in the optical and gamma-ray, suggesting that the sources of the radiation in the optical and gamma-ray are located in the same region of the jet. 相似文献
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Cole-Cole模型的频谱参数可以用于区分引起激电异常的极化体和寻找深部矿(化)体,因野外工作效率低,在勘探中没有得到广泛应用。当前的时域激电仪器可以观测反映二次极化电位衰减的多个时段的视充电率数据,根据频谱激电和时间域激电可以相互转换的理论,提出一种由时域激电数据提取出Cole-Cole模型参数方法,可得到4个频谱参数:视充电率Ms、视频率相关系数cs、视时间常数τs和视电阻率ρs。在江西某矿区激电中梯测量中,运用该方法推测地下地质体的性质并经钻探验证,取得了良好的找矿效果。 相似文献
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提出多分量瑞利波勘探的技术思想和方法,研制成功专用的防爆型多分量瑞利波勘探仪器,建立了在用极化分析对瑞利波勘探记录的多分量信号分析的基础上,用极化滤波提取有效瑞利波信号的方法。在煤矿井下及地面实际应用表明,多分量瑞利波勘探与单分量法比较,信号的信噪比、勘探深度和可靠性均有一定的提高。 相似文献
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The seismic anisotropy of the mantle is studied based on the data of S and ScS waves from earthquakes occurred in the mantle transition zone over the period of 2007–2013 and recorded by seismic stations in the continental margin of Asia, on Sakhalin Island, and in the southern part of the Kamchatka Peninsula. The measurements of the azimuths of polarization of the fast S and ScS waves in the continental margin of Asia show that they are predominantly oriented in the E–SE directions. Based on the distribution of the shear wave splitting parameters, the symmetry of the medium can be described in terms of a transversely isotropic model with a horizontal symmetry axis and may correspond to horizontal flow in the upper mantle beneath the Amur Plate. The fast azimuths of polarization of ScS wave, which were determined to be of N–NE directions in the northern area of Sakhalin Island and in the continental part of Asia, may correspond to an inclined flow under the conditions of oblique subduction and complex geometry of the downgoing Pacific Plate. In the south of the Kamchatka Peninsula, the S- and ScS-wave azimuths of polarization from the M 8.4 Sea of Okhotsk earthquake are determined to be oriented along the direction of the Pacific Plate motion. The fast-S-wave azimuths of polarization from the aftershocks of the Sea of Okhotsk earthquake and from other large events of 2008–2009 are determined to be nearly parallel to the motion trend of the Pacific Plate, but orthogonal to it for the events of 2008–2009. On the basis of the distribution of azimuths of polarization of the fast S waves, the symmetry of the medium can be described in terms of a transversely isotropic model with the symmetry axis inclined orthogonally to the plane of downgoing plate and oriented westward orthogonally to the trench strike. 相似文献