Research on Electrical Resistivity Prospection for Archeology

考古电阻率勘探研究

• 批准号: 05205102
• 负责人: AGU Masahiro
• 金额: $ 14.02万
• 依托单位: Ibaraki University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research on Priority Areas
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05205102/
• 关键词: prospection; resistivity; electrode; archaeology; apparent resitivity; theoretical calculation; 鏡像法; 多電極自動測定器; 市販探査器対応システム; 地形補正法; 回転楕円体近似; 高耐圧化; 多電極自動計測システム; ロックインアンプ; 2極法; 複素インピーダンス; 境界積分方程式; 3次元感度分布; 比抵抗法

1. A new type electrical resistivity prospecting system for archeological targetsWe have developed a new resistivity measuring system for archeological prospection which is composed of the dual phase lock-in amplifier, constant ac current source, electrodes selectors, and a hand held computer for automatic data acquisition. Maximum number of electrodes is 256. This system is suitable for japanese archeological sites. Displacement between electrodes is asumed to be in the range of 1 meter to several meters. Then suitable depth for prospection is less than ten meters. The lock-in amplifier is introduced to reduce noise level and measuring time.2. Inverse problems analysis and a compensation of surface irregularities.2-1. Delopment of efficient caluculation method.If ground surface is flat and smooth, ground surface can be eliminated from the system by combinning a boundary element method and a method of images. In this case, it is not necessary to take into account boudary conditions for … More very far places on the ground. Then the calculation time becomes shorter and the accuracy of calculation increases.2-1. Compensation of ground surface irreguralities.Ooyasuba-Kofun is an keyhole tomb with quadrangular rear mound, located at Kouriyama city in Fukushima prefecture. There were many concavities about one to two meters in diameters on the mound top, even though it is almost flat. It was found that these concavities deeply affected the apparent resistivity values. Thus, it was tried to eleminate effects of concavities. Apparent resistivity values on the flat surface with a hemispheric concavity can be calculated theoretically. Then, it is easy to aliminate the effect of concavity, if we devide measured resistivity values by caluculated values. It was found that there was place whose apparent resistivity was lower than that of surounding area even after compensations. Afterword, itwas found that there was a clay coated wood coffin just at this place by the excavation of the Kouriyama city's board of education. Less

1.一种新型的考古目标电阻率测量系统我们研制了一种新型的考古电阻率测量系统，该系统由双相锁相放大器、交流恒流源、电极选择器和手持计算机自动采集数据组成。最大电极数为256个。该系统适用于日本考古遗址。电极之间的位移估计在1米到几米的范围内。那么勘探的合适深度不超过十米。引入锁相放大器，降低了噪声水平，缩短了测量时间。反问题分析和曲面不规则性的补偿2-1。开发了高效的计算方法。如果地面平坦光滑，则可以通过边界单元法和图像法相结合的方法来消除系统中的地面。在这种情况下，不需要考虑…的边界条件地面上更多非常遥远的地方。从而缩短了计算时间，提高了计算精度2-1。地表不规则性的补偿。Oya asuba-Koun是位于福岛县口里山市的一个四角形后丘的钥匙孔陵墓。在土丘顶部有许多直径约一到两米的凹陷，尽管它几乎是平的。研究发现，这些凹陷对视电阻率值有很大影响。因此，人们试图消除凹陷的影响。理论上可以计算具有半球凹陷的平面上的视电阻率值。然后，如果将测量的电阻率值与计算值相除，则很容易消除凹陷的影响。发现补偿后仍有视电阻率低于周边地区视电阻率的地方。后记，在口里山市教育局的发掘中，就在这个地方发现了一口粘土包裹的木棺材。较少

项目成果

Masahiro Agu: "Archaeological Perspection Using Resistivity Measurement system" The 5th Proceedings of Research Project of Prospection Techniques. 267-278 (1997)

Masahiro Agu：“利用电阻率测量系统进行考古勘探”勘探技术研究项目第五期论文集。

大渕真也: "GAによる2値パターンの推定法" 第4回 日本ME学会資料集. 17-21 (1995)

Shinya Obuchi：“使用 GA 估计二进制模式”第 4 届日本 ME 协会资料集 17-21 (1995)。

Koji Noguchi: "Numerical Experiment and Application of Resistivity Tomography" Menory of the School of Science & Engineering Waseda University. 56. 53-73 (1993)

野口浩二：理学院“电阻率层析成像的数值实验与应用”

Hideo Akabane: "A New Automatic Resistivity Measurement System Using a Phase Detective Amplifier" Program and Abstract of International Symposium on Archaeometry 1996, Urbama, Illinois, U.S.A.4-5 (1996)

Hideo Akabane：“使用相位检测放大器的新型自动电阻率测量系统”计划和 1996 年国际考古学研讨会摘要，美国伊利诺伊州 Urbama 4-5 (1996)

安久正絋: "電気探査法による遺跡探査の研究" 第3回研究成果検討会議論文集. 167-185 (1995)

Masahiro Yasuhisa：“利用电勘探法进行遗址勘探的研究”第三届研究成果审查会议论文集167-185（1995）。