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1. 发明授权

US5091891A Seismic pulse generation 失效
标题翻译：地震脉冲发生
公开(公告)号：US5091891A
公开(公告)日：1992-02-25
申请号：US511277
申请日：1990-04-23
申请人： Keith M. Thomas , Michael R. Dongworth , Alec Melvin
发明人： Keith M. Thomas , Michael R. Dongworth , Alec Melvin
IPC分类号： G01V1/02 , B06B1/20 , G01V1/137
CPC分类号： G01V1/137
摘要： A seismic pulse generator comprises a body 1 having an internal gas-pressurizable first chamber 2 adjoining a second chamber 6 for containing a fluid. A flap valve member 21 is rotatable about a pivot axis for closing a bore 24 communicating with the first chamber. A latch 22 releasably retains the flap valve member in the closed position and a gas operated piston 13 slidably moves within an associated cylinder 12. When the first chamber 2 is pressurized with gas and the flap valve member 21 is released from its closed position to uncover the bore 24, the piston 13 moves to cause communication between the chambers 2,6 and generation of a shock wave in the second chamber. The second chamber has outlet means 7 to permit a pulse of energy to be transmitted from the second chamber in response to the shock wave generated in the second chamber. The flap valve member can be arranged to be openable such that full bore opening of the bore 24, loss of gas pressure from bore 24, and the response of piston 13 to cause communication between the chambers can all be achieved very rapidly.

2. 发明授权

US5270985A Seismic pulse generation 失效
标题翻译：地震脉冲发生
公开(公告)号：US5270985A
公开(公告)日：1993-12-14
申请号：US943153
申请日：1992-09-10
申请人： Keith M. Thomas , Michael R. Dongworth , Alec Melvin
发明人： Keith M. Thomas , Michael R. Dongworth , Alec Melvin
IPC分类号： G01V1/135 , G01V1/137
CPC分类号： G01V1/135
摘要： An acoustic wave energy generator comprises a body having an internal gas-pressurisable first chamber 1 adjoining a second chamber 2 into which a liquid is introduced to cover a vibratable means 4 which may be a flexible diaphragm and is mounted on the second chamber so as to close an associated opening 5 in the second chamber. After the first chamber 1 is pressurised with a first gas a common closed opening between the chambers is opened to cause communication between the chambers 1,2 to permit a shock wave emanating from the first chamber to impinge on the liquid. As a result, the vibratable means 4 is caused to vibrate so as to produce acoustic wave energy in response to the impingement of the shock wave on the liquid. By using different liquids and/or different heights of liquids in the second chamber the generator may be tuned to provide acoustic wave energy with a relatively narrow chosen frequency range or within a chosen substantially single frequency.
摘要翻译：声波能量发生器包括具有邻近第二腔室2的内部可气体加压的第一腔室1的主体，液体被引入到其中以覆盖可振动的装置4，可振动装置4可以是柔性隔膜并安装在第二腔室上，从而关闭第二个室中相关的开口5。在第一腔室1被第一气体加压之后，腔室之间的公共闭合开口被打开以引起腔室1,2之间的连通，以允许从第一腔室发出的冲击波撞击液体。结果，使可振动装置4振动，以响应冲击波对液体的冲击而产生声波能量。通过在第二室中使用不同液体和/或不同高度的液体，发生器可以被调谐以提供具有相对窄的选定频率范围或者在所选择的基本单个频率内的声波能量。

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