Development of ultra-high precision accelerometer for gravity tensor measurement

• Project/Area Number: 22360378
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Earth system and resources enginnering
• Research Institution: Shizuoka University
• Principal Investigator: KASAHARA Junzo 静岡大学, 防災総合センター, 客員教授 (70012953)
• Co-Investigator(Kenkyū-buntansha): KONDO Hayato 東京海洋大学, 海洋工学部, 准教授 (40361802) ; SHIMIZU Etsuro 東京海洋大学, 海洋工学部, 准教授 (60313384)
• Project Period (FY): 2010 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥13,390,000 (Direct Cost: ¥10,300,000、Indirect Cost: ¥3,090,000); Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2011: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000); Fiscal Year 2010: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
• Keywords: 重力テンソル / 加速度計 / 密度 / フォースバランス / レーザー干渉計 / 密度構造 / エトベス / 超高精度計測 / 資源探査 / レーザー干渉

Research Abstract

We have developed a prototype gravity tensor instrument. The displacements applied by acceleration to the proof mass are measured by laser interferometer. We tested this prototype instrument in the tunnel of Matsushiro Earthquake observatory of JMA. Though the measurement is influenced by the air pressure, room temperature and the temperature of laser driver circuit, two units show similar variation with time during one month. The measurements of two units are consistent within 10nm, 3 μgal and 30 Etoves.

Research Products

• [Journal Article] A new 3D gravitational tensor inversion for imaging of density distribution in the ground (2011)
  • Author(s): Kasahara,J., Hasada, Y., Kondo,H.,and Tsuruga, K.
  • Journal Title: EAGE Viena, Extended Abstract(CDROM) Volume: P065 Pages: 1-4
  • Peer Reviewed
• [Journal Article] A new 3D gravitational tensor inversion for imaging of density distribution in the ground, 2011 (2011)
  • Author(s): Kasahara, J., Hasada, Y., Kondo, H., Tsuruga, K.
  • Journal Title: EAGE Viena, Extended Abstract Volume: P065(CDROM) Pages: 1-4
  • Peer Reviewed
• [Journal Article] 重力テンソルインバージョンによる地下構造探査 (2010)
  • Author(s): 笠原順三、羽佐田葉子、近藤逸人、鶴我佳代子
  • Journal Title: 物理探査学会123回講演論文集 Volume: 123巻 Pages: 123-126
  • Peer Reviewed
• [Presentation] Develpoment of a new 3D gravitational tensor inversion for imaging of density distribution in the ground (2013)
  • Author(s): Kasahara,J
  • Organizer: 物理探査学会
  • Place of Presentation: 会場未定(宮城県)
• [Presentation] Develpoment of a new 3D gravitational tensor inversion for imaging of density distribution in the ground (2013)
  • Author(s): Kasahara, J.
  • Organizer: 物理探査学会
  • Place of Presentation: 会場未定（宮城県）
• [Presentation] 渉計を用いた重力テンソル計測システムの開発研究 (2011)
  • Author(s): 竹田克之、笠原順三、近藤逸人、羽佐田葉子(大和探査)、清水悦郎
  • Organizer: 第54回自動制御連合講演会(CDROM)
  • Place of Presentation: 国立大学法人豊橋技術科学大学(愛知県)
  • Year and Date: 2011-11-19
• [Presentation] レーザー干渉計を用いた重力テンソル計測システムの開発研究,2011 (2011)
  • Author(s): 竹田克之、笠原順三、近藤逸人、羽佐田葉子(大和探査)、清水悦郎
  • Organizer: 第54回自動制御連合講演会
  • Place of Presentation: 国立大学法人豊橋技術科学大学(愛知県豊橋市天伯町雲雀ヶ丘1-1)(CDROM)
  • Year and Date: 2011-11-19