Hydroacoustic sonar equipment
    4.
    发明授权
    Hydroacoustic sonar equipment 失效
    水声声纳设备

    公开(公告)号:US4949318A

    公开(公告)日:1990-08-14

    申请号:US360200

    申请日:1989-06-01

    CPC分类号: G01S7/526 G01S7/529

    摘要: The invention relates to a hydroacoustic sonar system in which received signals are processed without extensive filtering thereby to conserve higher fourier components of the received signals and so conserve useful information of targets. This is achieved by using a wideband detector module to effect demodulation of the received signals, and so eliminating the usual intermediate frequency stage. The module comprises a wideband input amplifier, a wideband full wave detector and an active low pass filter having a cut off frequency of at least 50 kHz.

    Porous dike intake structure for fish diversion
    5.
    发明授权
    Porous dike intake structure for fish diversion 失效
    用于鱼类分流的多孔堤防进水结构

    公开(公告)号:US06955759B2

    公开(公告)日:2005-10-18

    申请号:US10621508

    申请日:2003-07-18

    摘要: A structure for diverting fish away from water intakes comprises a porous dike having a bottom portion, a central portion, and a top portion, the top portion preferably being submerged a short distance below the surface, and the central portion having flow passages. In a preferred embodiment, the top and bottom portions comprise solid blocks and the flow passages in the central portion are lined with zebra mussel resistant sleeves to minimize clogging. Preferably the sleeve can be readily replaced as desired.

    摘要翻译: 用于使鱼离开进水口的结构包括具有底部,中心部分和顶部的多孔堤坝,顶部部分优选地在表面下方浸没短距离,并且中心部分具有流动通道。 在优选实施例中,顶部和底部包括固体块,并且中心部分中的流动通道衬有斑马贻贝防护套筒以最小化堵塞。 优选地,可以根据需要容易地更换套筒。

    Fish attracting or repelling device comprising diode array
    6.
    发明授权
    Fish attracting or repelling device comprising diode array 失效
    鱼吸引或排斥装置包括二极管阵列

    公开(公告)号:US06203170B1

    公开(公告)日:2001-03-20

    申请号:US09306840

    申请日:1999-05-07

    IPC分类号: F21V3100

    摘要: A device for attracting and/or repelling fish comprises an array of visible light emitting diodes encased in a water resistant, protective housing which is substantially transparent to the visible light emitted by the diodes. In one preferred embodiment, a cylindrical housing containing the diode array is attached to a float, on the upper surface of which is provided a photovoltaic module which charges a battery located in a lower portion of the housing. In other preferred embodiments, the device is adapted to be submerged below the surface of a body of water and is connected to a remote power supply. The device is preferably used to attract fish, with the diodes emitting visible light in the green, blue and violet regions of the visible spectrum.

    摘要翻译: 用于吸引和/或排斥鱼的装置包括封装在防水保护壳体中的可见光发射二极管的阵列,其对由二极管发射的可见光基本透明。 在一个优选实施例中,包含二极管阵列的圆柱形壳体附接到浮子上,浮子的上表面设置有对位于壳体下部的电池进行充电的光伏模块。 在其他优选实施例中,该装置适于浸没在水体表面下方并连接到远程电源。 该装置优选地用于吸引鱼,其中二极管在可见光谱的绿色,蓝色和紫色区域中发射可见光。

    Non-electric perimeter fence
    7.
    发明授权
    Non-electric perimeter fence 有权
    非电动围栏

    公开(公告)号:US06199831B1

    公开(公告)日:2001-03-13

    申请号:US09342927

    申请日:1999-06-30

    IPC分类号: E04H1700

    CPC分类号: A01K3/00 E04H17/003 E04H17/24

    摘要: A non-electric perimeter fence to prevent animals from entering a restricted area comprises a vertical barrier member extending to a predetermined height above ground level and an angled barrier member extending upwardly and outwardly from the vertical member relative to the restricted area. The vertical member may comprise a conventional chain link fence and the angled member is preferably made of a sheet material. The surface of the angled member which is presented to an animal attempting to climb over the fence is preferably smooth and free of protrusions which could assist the animal in climbing the fence. Preferably, the height of the angled member is sufficient to prevent an animal such as an adult raccoon from reaching over its upper edge.

    摘要翻译: 用于防止动物进入限制区域的非电动周界围栏包括延伸到地面以上的预定高度的垂直阻挡构件和从垂直构件相对于限制区域向上和向外延伸的成角度的阻挡构件。 垂直构件可以包括常规的链节围栏,并且倾斜构件优选地由片材制成。 提供给试图爬过围栏的动物的倾斜构件的表面优选是平滑的且没有可以帮助动物攀爬围栏的突起。 优选地,成角度的构件的高度足以防止诸如成年浣熊的动物到达其上边缘。