Transmit phase control system of synchronization burst for SDMA/TDMA
satellite communication system
    1.
    发明授权
    Transmit phase control system of synchronization burst for SDMA/TDMA satellite communication system 失效
    SDMA / TDMA卫星通信系统同步脉冲串发射相位控制系统

    公开(公告)号:US3995111A

    公开(公告)日:1976-11-30

    申请号:US551676

    申请日:1975-02-21

    CPC classification number: H04B7/2048

    Abstract: A transmit phase control system of synchronization burst is disclosed for use in a SDMA/TDMA satellite communication system in which a phase error between a synchronization burst transmitted from an earth station and a synchronization window, assigned as a time slot on a satellite for returning the synchronization burst, is measured and the transmit phase of the synchronization burst is controlled based on the measured value. Phase error measurement is achieved a plurality of times in connection with the received synchronization burst of each station, and a decided phase error is derived based on the measured value obtained by the plurality of measurements. The transmit phase of the synchronization burst is then controlled in accordance with the decided phase error. Further, the phase error decision is achieved at every 1/n (n being an integer larger than 1) round trip and the present synchronization burst is transmitted with its transmit phase corrected corresponding to a value that is the sum of the phase corrected value of the n preceding phase correction instants subtracted from the decided phase error at the present instant.

    Abstract translation: 公开了一种在SDMA / TDMA卫星通信系统中使用的同步突发的发射相位控制系统,其中从地球站发送的同步脉冲串与同步窗口之间的相位误差被指定为卫星上的时隙以返回 测量同步脉冲串,并根据测量值控制同步脉冲串的发射相位。 结合每个站的接收到的同步脉冲串实现多次相位误差测量,并且基于由多个测量获得的测量值导出所确定的相位误差。 然后根据所确定的相位误差来控制同步脉冲串的发射相位。 此外,在每1 / n(n是大于1的整数)往返行程中实现相位误差判定,并且发送当前同步脉冲串,其发射相位被校正,对应于作为相位校正值 在当前时刻从所确定的相位误差中减去n个前一相位校正时刻。

    Dust collection device for power tool and power tool
    3.
    发明授权
    Dust collection device for power tool and power tool 有权
    电动工具和电动工具除尘装置

    公开(公告)号:US09108284B2

    公开(公告)日:2015-08-18

    申请号:US13421528

    申请日:2012-03-15

    CPC classification number: B23Q11/0046 B23Q11/0071

    Abstract: In a dust collection device attached to a hammer drill, a filter is provided in a dust box at a position at which the filter covers an outlet provided on a rear face of a lid body, in a state such that a filter surface projects into the dust box from the rear face of the lid body. A space is formed between an inner face of a box main body and a side face of the filter that is adjacent to the filter surface. Air outlets are provided to guide air, which flows in through an inlet, toward the space.

    Abstract translation: 在安装在锤钻机上的集尘装置中,过滤器设置在集尘箱内的过滤器覆盖设置在盖体背面的出口的位置,使得过滤面突出到 从箱体后面的集尘箱。 在箱主体的内表面和与过滤器表面相邻的过滤器的侧面之间形成空间。 空气出口被设置成引导通过入口流入空气的空气。

    DUST COLLECTION DEVICE FOR POWER TOOL AND POWER TOOL
    4.
    发明申请
    DUST COLLECTION DEVICE FOR POWER TOOL AND POWER TOOL 有权
    用于电动工具和电动工具的集尘装置

    公开(公告)号:US20120273243A1

    公开(公告)日:2012-11-01

    申请号:US13421528

    申请日:2012-03-15

    CPC classification number: B23Q11/0046 B23Q11/0071

    Abstract: In a dust collection device attached to a hammer drill, a filter is provided in a dust box at a position at which the filter covers an outlet provided on a rear face of a lid body, in a state such that a filter surface projects into the dust box from the rear face of the lid body. A space is formed between an inner face of a box main body and a side face of the filter that is adjacent to the filter surface. Air outlets are provided to guide air, which flows in through an inlet, toward the space.

    Abstract translation: 在安装在锤钻机上的集尘装置中,过滤器设置在集尘箱内的过滤器覆盖设置在盖体背面的出口的位置,使得过滤面突出到 从箱体后面的集尘箱。 在箱主体的内表面和与过滤器表面相邻的过滤器的侧面之间形成空间。 空气出口被设置成引导通过入口流入空气的空气。

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