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公开(公告)号：EP0793811A1
公开(公告)日：1997-09-10
申请号：EP95918782.0
申请日：1995-05-05
申请人： PGS Seres AS
摘要： Acoustic transmitter in particular for use in offshore seismic explorations, having sound-emitting surfaces (1, 2) being adapted to be subjected to vibrational movement by means of a drive unit (21) through at least one push element (22A, 22B) and two plate-like end pieces (3, 4) which are connected to the sound-emitting surfaces. The sound-emitting surfaces are formed by two curved plate members (1, 2) being of comparable width and heigth dimensions. The end pieces (3, 4) have a generally rectangular shape with a first pair of opposing side edges connected (5, 6, 7, 8) to end portions of the plate members (1, 2). Another pair of side edges on each end piece (3, 4) as well as side edges of the plate members engage two side plates (9, 10) which at either side closes the acoustic transmitter, preferably in a tightly enclosing manner.
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公开(公告)号：EP0758455A1
公开(公告)日：1997-02-19
申请号：EP95918783.0
申请日：1995-05-05
申请人： PGS Seres AS
摘要： Flextensional acoustic source with sound-emitting surfaces (1, 2, 3, 4) adapted to be excited into vibrational movement, and for use in seismic exploration at sea. The source comprises a drive unit (21) being through the intermediary of at least one push element (22A, 22B) adapted to impose vibrational movement to the sound-emitting surfaces. Between at least one push element (22A, 22B) and the associated sound-emitting surface(s) (1, 2, 3, 4) there is provided a non-linear spring element (27, 28) the spring constant of which is controllable. Two oppositely acting push elements (22A, 22B) are arranged in axial alignment and preferably centrally in the source, and in addition thereto there are provided at least two tension elements (39, 40) with associated controllable, non-linear spring elements (35, 36, 37, 38) and being coupled to the sound-emitting surfaces (1, 2, 3, 4).
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公开(公告)号：EP0793811B1
公开(公告)日：2002-10-16
申请号：EP95918782.4
申请日：1995-05-05
申请人： PGS Seres AS
摘要： Acoustic transmitter in particular for use in offshore seismic explorations, having sound-emitting surfaces (1, 2) being adapted to be subjected to vibrational movement by means of a drive unit (21) through at least one push element (22A, 22B) and two plate-like end pieces (3, 4) which are connected to the sound-emitting surfaces. The sound-emitting surfaces are formed by two curved plate members (1, 2) being of comparable width and heigth dimensions. The end pieces (3, 4) have a generally rectangular shape with a first pair of opposing side edges connected (5, 6, 7, 8) to end portions of the plate members (1, 2). Another pair of side edges on each end piece (3, 4) as well as side edges of the plate members engage two side plates (9, 10) which at either side closes the acoustic transmitter, preferably in a tightly enclosing manner.
摘要翻译： 特别用于离岸地震勘探的声波发射器，其具有适于借助于驱动单元（21）通过至少一个推动元件（22A，22B）进行振动运动的发声表面（1,2），以及 两个与发声表面连接的板状末端件（3,4）。 发声表面由具有可比较宽度和高度尺寸的两个弯曲板构件（1,2）形成。 端部件（3,4）具有大致矩形的形状，其中第一对相对的侧边缘（5,6,7,8）连接到板构件（1,2）的端部。 每个端部件（3,4）上的另一对侧边缘以及板件的侧边缘优选以紧密封闭的方式接合两个侧板（9,10），所述侧板在任一侧封闭声发射器。
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