Title:
PHYSICAL SURVEYING METHOD BY DISCHARGE BREAKDOWN AND ITS DEVICE
Document Type and Number:
Japanese Patent JP3883298
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To conduct an accurate geological survey by accurately grasping the developing time of impact force.
SOLUTION: Electric energy is fed to a metal fine wire 1a in a short time, an elastic wave propagated in the surveyed natural ground is generated by the impact force when the metal fine wire 1a is fused and vaporized, and its reflected wave or refracted wave is detected by an acceleration sensor 4 to survey the geological features of the natural ground. A discharge switch 8 is turned on by a trigger signal, electric energy is fed to the metal fine wire 1a, the trigger signal is extracted to a vibration measuring device 12 via a starting output line 21 to detect the electric energy feed start time, and the delay time from the electric energy feed start to the generation of the impact force inputted in advance in response to the characteristic of a hypocenter device 1 is added to obtain the developing time of the impact force.
Inventors:
Hiroshi Imai
Jun Kawakami
Hironari Arai
Hidehiko Maebata
Jun Kawakami
Hironari Arai
Hidehiko Maebata
Application Number:
JP21950998A
Publication Date:
February 21, 2007
Filing Date:
August 04, 1998
Export Citation:
Assignee:
Hitachi Zosen Corporation
International Classes:
E02D1/02; G01V1/157; E21C37/18; G01V1/00; (IPC1-7): G01V1/157; E02D1/02; G01V1/00
Domestic Patent References:
| JP7286490A | ||||
| JP63175791A | ||||
| JP8318520A | ||||
| JP3505372A | ||||
| JP9038950A | ||||
| JP9038954A | ||||
| JP62043587A |
Other References:
川上純, 今井博, 前畑英彦, 荒井浩成, 井上鉄也,放電衝撃の地震探査用震源としての特性,物理探査学会第98回(平成10年度春季)学術講演会講演論文集,1998年 6月
Attorney, Agent or Firm:
Yoshihiro Morimoto
Previous Patent: PNEUMATIC RADIAL TIRE
Next Patent: GEOPHYSICAL EXPLORATION METHOD AND DEVICE BY DISCHARGE BREAKDOWN
Next Patent: GEOPHYSICAL EXPLORATION METHOD AND DEVICE BY DISCHARGE BREAKDOWN