公开(公告)号：US3688584A

公开(公告)日：1972-09-05

申请号：US3688584D

申请日：1971-02-09

Applicant: LITTLE INC A

Inventor： STONE RICHARD S ,  LAPSON LAWRENCE B

IPC: G01V7/14 ,  G01V7/04

CPC classification number: G01V7/14

Abstract: Apparatus for measuring gravity gradients directly. Two retroreflectors are caused to experience free flight, and the radiation reflected by these retroreflectors during free flight is directed to a radiation receiver which senses and measures the temporal variations of intensity of the interfering reflected radiation beams. The time rate of change of the frequency of the output signal of the receiver is directly related to the vertical gradient of gravity. The instrument of this invention has means to correct for any shifting of the retroreflectors relative to each other and to the radiation beam in planes normal to the radiation beam.

Abstract translation: 直接测量重力梯度的装置。 导致两个后向反射器经历自由飞行，并且在自由飞行期间由这些回射器反射的辐射被引导到辐射接收器，其感测并测量干涉反射辐射束的强度的时间变化。 接收机输出信号频率的时间变化率与垂直重力梯度直接相关。 本发明的仪器具有校正反射器相对于彼此的任何偏移以及垂直于辐射束的平面中的辐射束的装置。