• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
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    • 专利摘要:

    公开号:SE0301770A1
    申请号:SE0301770
    申请日:2003-06-18
    公开日:2010-08-20
    发明作者:Ragnar Slunga；Gunnar Sundin；Per Davidsson
    申请人:Totalfoersvarets Forskningsins；
    IPC主号:
    专利说明:

    15 20 25 30 35 lnk. t. Patent and Registration Office 2003 -ÛB- 1 8 2 The invention and its embodiments are described in more detail in the following independent claims 1 and 7 and associated subclaims.
    The invention will now be described in more detail in connection with the accompanying figures: Fig. 1 shows the principle of mechanical sonar.
    Fig. 2 shows the principle of software-controlled sonar.
    Fig. 3 shows a torpedo with sonar elements arranged on a plate.
    Fig. 4 shows a torpedo with conformally arranged sonar elements. Figure 1 shows a first embodiment of the invention. The sonar (3) is here placed on a movable platform (10), e.g. a torpedo, which moves forward with a first velocity and direction, velocity vector (v). The platform (10) also comprises means (not shown) which move the sonar (3) with a second speed and direction, velocity vector (w), in this case to the left in the figure, at the same time as the platform (10) moves forward. The sonar's total direction and velocity, velocity vector (S), is thus directed one angle (A) from the direction of movement (v) of the platform.
    The direction of the total velocity vector (S) is made to coincide with the desired reconnaissance direction of the sonar. In the figure, the first (v) and second velocity vectors (w) are perpendicular to each other.
    This is to simplify the display principle of the invention. The second velocity vector (w) can also be given other directions.
    Figure 2 shows a second embodiment of the invention where fixed sonar elements are controlled individually. The figure shows a number of transmitter element (s) arranged in a row. Instead of moving the elements with a mechanical means, a means is used to control a movement of which elements are currently used. At a first time tj transmits the four right elements (s1, sz, s3, s4). At a later time t2 when the elements have moved a distance forward, the four middle elements (S2, s3_ s4, sä) instead transmit and at the time ta the four left elements (S3, s4, s5_ se) transmit. A sonar also includes a number of receiver elements (not shown, may be the same) which also work with displacement of the elements and reception in the same direction as the transmitter elements (s). The timing of both the transmitter and receiver elements is determined by the own speed, possible rotation, the geometric location of the elements and the desired ink. t. Patent and Registration Office 2003 -ÛB- 1 8 3 reconnaissance direction. By appropriately selected weighting as a function of time of the different sonar elements, an apparent (imaginary) movement of the sonar is achieved with the same effect as in the first embodiment.
    Figure 3 shows a torpedo (1) with a sonar according to the second embodiment of the invention. A sonar (3) according to this embodiment can replace the sonar that is in today's torpedoes and thereby increase the torpedo's ability to search and find targets. Figure 4 shows another torpedo (1), here the transmitter (s) and receiver elements of the sonar (3) have been arranged conformally on the front part of the torpedo. The principle for controlling the elements is the same as above.
    The invention shows a sonar and method which, despite its high speed, can detect targets early in addition to the sonar's direction of movement by avoiding disturbing self-doppler effect. This can also be done in a cheap way by modifying existing sonar with new software. The sonar does not have to be flat but can, for example, have a conform, the important thing is that you can use a dimension across the direction of movement of the platform.
    The invention is shown in the exemplary embodiments together with a torpedo, but the invention can also be applied to another mobile platform, e.g. ships or as tow zones.
    权利要求:
    Claims (1)
    [1]
    1. 0 15 20 25 30 35 Hm. L. rJ fi IGHI- OCH Regísffermgsverket: “* in 2003 -ÛS- 1 8 PATE NTKRAV Active sonar for side reconnaissance with a first velocity vector (v), characterized in that the sonar comprises means for moving the sonar with a second velocity vector (w), so that the total velocity vector (S) of the sonar is laterally angled at an angle (A) from the direction of motion (v). Active sonar according to claim 1, characterized in that the movement of the sonar with the second velocity vector takes place physically and / or imaginary. Active sonar according to any one of claims 1-2, characterized in that the second velocity vector (w) is perpendicular to the first velocity vector (v). Active sonar according to any one of claims 1-3, characterized in that the sonar (3) comprises a number of transmitter element (s), which are controlled separately to effect an imaginary side movement. Active sonar (3) according to claim 4, characterized in that the movement takes place by time-controlling the transmission elements. Active sonar (3) according to one of Claims 4 to 5, characterized in that the transmission and reception direction of each transmitter and receiver element are controlled. Method of active sonar, with a first velocity vector (v), utilizing the Doppler effect for lateral reconnaissance at an angle (A) from the first velocity vector, characterized in that a second velocity vector (w) acting on the sonar causes the sonar to obtain a total velocity vector (S) directed in the lateral direction, at the angle (A) from the first velocity vector (v). A method according to claim 7, characterized in that the sonar comprises a number of transmitter elements (s) which are controlled individually to effect an imaginary movement along the second velocity vector (w). Ink. t. Patent och Registreringsverket /, _________ 2003 -ns- 1 a 5 - Method according to one of claims 7-8, characterized in that by moving a number of transmission element (s) in time, a movement of the active transmission element (s) is achieved.
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    同族专利:
    公开号 | 公开日
    SE533844C2|2011-02-08|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE0301770A|SE533844C2|2003-06-18|2003-06-18|Active sonar and method of active sonar|SE0301770A| SE533844C2|2003-06-18|2003-06-18|Active sonar and method of active sonar|
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