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    • 3. 发明授权
    • Demodulating method and receiver apparatus
    • 解调方法和接收装置
    • US06535566B1
    • 2003-03-18
    • US09298052
    • 1999-04-22
    • Masaya TamamuraKen Yamauchi
    • Masaya TamamuraKen Yamauchi
    • H04L2500
    • H04L27/38H04L27/22
    • A demodulating method demodulates a received signal received by a demodulator unit by detecting an absolute phase of signal points of the received signal. The demodulating method includes a first step of detecting the absolute phase by a first phase detecting method, a second step of detecting the absolute phase by a second phase detecting method in parallel with the first step, where the second phase detecting method has a slower detection speed or a higher detection accuracy than the first phase detecting method, and a third step of determining the absolute phase based on a phase detection result of the first step when phase detection results of the first and second steps are the same, and determining the absolute phase based on the phase detection result of the second step when the phase detection results of the first and second steps are different.
    • 解调方式通过检测接收信号的信号点的绝对相位来解调由解调器单元接收的接收信号。 解调方法包括:通过第一相位检测方法检测绝对相位的第一步骤,与第一步骤并行地通过第二相位检测方法检测绝对相位的第二步骤,其中第二相位检测方法具有较慢的检测 速度或更高的检测精度;以及第三步骤,当第一和第二步骤的相位检测结果相同时,基于第一步骤的相位检测结果确定绝对相位,并且确定绝对值 当第一和第二步骤的相位检测结果不同时,基于第二步骤的相位检测结果的相位。
    • 10. 发明授权
    • Power tool
    • 电动工具
    • US09199353B2
    • 2015-12-01
    • US13089815
    • 2011-04-19
    • Tomoyuki OtaMasanori FurusawaKen Yamauchi
    • Tomoyuki OtaMasanori FurusawaKen Yamauchi
    • B23B31/02B24B23/02B24B45/00
    • B24B23/02B24B45/003Y10T279/16Y10T279/33Y10T279/3406Y10T279/3487
    • An effective technique is provided for rationally clamping and holding various kinds of tool bits which can be selectively replaced with each other and attached to the driving shaft, in a power toolThe power tool includes a driving shaft 125 for driving a tool bit 109A or 109B which is arbitrarily selected from various kinds of tool bits, a first clamping element 133 provided on the driving shaft 125 and a second clamping element 135A, 135B provided separately from the driving shaft 125 and can be fixed to the driving shaft 125. The selected tool bit 109A, 109B is clamped and held between the first clamping element 133 and the second clamping element 135A, 135B. Various kinds of the tool bits 109A, 109B have holes 163, 167 formed according to the kind of the tool bit, and either one of the first clamping element 133 and the second clamping element 135A, 135B has various kinds of protruding engagement parts 149, 153 appropriate to the kind of the tool bit 109A, 109B and engaged with the holes 163, 167 formed according to the kind of the tool bit 109A, 109B.
    • 提供了一种有效的技术,用于合理地夹持和保持可以在电动工具中彼此选择性地替换并附接到驱动轴的各种工具头。电动工具包括用于驱动工具头109A或109B的驱动轴125 设置在驱动轴125上的第一夹紧元件133和与驱动轴125分开设置的第二夹持元件135A,135B,可以固定在驱动轴125上。所选择的工具 位109A,109B被夹紧并保持在第一夹紧元件133和第二夹紧元件135A,135B之间。 各种刀具109A,109B具有根据刀头的种类形成的孔163,167,并且第一夹紧元件133和第二夹紧元件135A,135B中的任一个具有各种突出接合部149, 153适用于工具钻头109A,109B的种类,并与根据工具钻头109A,109B的种类形成的孔163,167啮合。