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    • 1. 发明授权
    • Radio receiver comprising automatic gain controlling function
    • 无线电接收机包括自动增益控制功能
    • US5321851A
    • 1994-06-14
    • US612551
    • 1990-11-13
    • Sakae SugayamaHisao IshiiShinichi Yamazaki
    • Sakae SugayamaHisao IshiiShinichi Yamazaki
    • H03G3/30H03J7/28H04B7/00
    • H03G3/3052H03J7/285
    • A cross modulation interference free AM radio receiver with precise channel selection includes an RF amplifying circuit for a radio frequency (RF) signal incoming through an antenna (1; 101) to output a wide band RF signal and an automatic gain control (AGC) circuit (7; 107) for controlling the gain of the RF amplifying circuit in accordance with the field strength of the wide band RF signal. A circuit (3, 4, 5, 6; 109, 110, 111, 112, 113) as provided for extracting a desired signal from the wide band RF signal, and a first control circuit (81; 114, 116, 118) for reducing the AGC effect of the AGC circuit in a decrease in the field strength of the desired signal which results in an increase in the amplification rate of the RF amplifying circuit. A second control circuit (8) makes the first control circuit non-operative in response to an instruction of an automatic channel selection at which time the AGC circuit performs an AGC operation only in accordance with the field strength of a wide band RF signal. A third control circuit (118) sets the AGC circuit in forced AGC state where the gain of the RF amplifying circuit is minimized when the field strength of the desired signal is above a first reference value, and a sensitivity switching circuit (119) reduces the sensitivity of the AGC circuit to the wide band RF signal field strength when the field strength of the desired signal is below a second reference value.
    • 具有精确信道选择的交叉调制无干扰的无线电接收机包括用于通过天线(1; 101)输入的射频(RF)信号的RF放大电路,以输出宽带RF信号和自动增益控制(AGC)电路 (7; 107),用于根据宽带RF信号的场强来控制RF放大电路的增益。 提供用于从宽带RF信号中提取期望信号的电路(3,4,5,6; 109,110,111,112,113)以及第一控制电路(81; 114,116,118),用于 在所需信号的场强降低中降低AGC电路的AGC效应,导致RF放大电路的放大率增加。 第二控制电路(8)使得第一控制电路响应于自动信道选择的指令而不工作,此时AGC电路仅根据宽带RF信号的场强执行AGC操作。 第三控制电路(118)将AGC电路设置为强制AGC状态,其中当期望信号的场强高于第一参考值时RF放大电路的增益最小化,并且灵敏度切换电路(119)将 当所需信号的场强低于第二参考值时,AGC电路对宽带RF信号场强的灵敏度。
    • 2. 发明授权
    • Thermal displacement correcting method of machine tool
    • 机床热位移校正方法
    • US5619414A
    • 1997-04-08
    • US425746
    • 1995-04-20
    • Hisao Ishii
    • Hisao Ishii
    • B23Q15/18G05B19/404G05B19/048
    • G05B19/404G05B2219/49214
    • A method of correcting thermal displacement error in a driving system of a machine tool comprises forming a heat distribution model including the driving system, and finding an amount of drive in the driving system in the heat distribution model, estimating a heating value supplied to the heat distribution model depending upon the amount of drive, estimating a temperature distribution state in the distribution model by finding a time variation of heating value in the heat distribution model receiving supply of the estimated heating value, finding an amount of heat displacement in the driving system depending upon the temperature distribution state and finding a correction value for thermal displacement correction depending upon the amount of thermal displacement. It is thereby possible to correct the thermal displacement error in the driving system of the machine tool without a detector.
    • 一种校正机床的驱动系统中的热位移误差的方法,包括形成包括所述驱动系统的热分布模型,并且在所述热分布模型中求出驱动系统中的驱动量,估计供给到所述热量的热值 分配模型取决于驱动量,通过在接收供给估计的热值的热分布模型中找到热值的时间变化来估计分布模型中的温度分布状态,找到驱动系统中的热位移量取决于 根据温度分布状态,根据热位移量求出热位移校正的校正值。 从而可以在没有检测器的情况下校正机床的驱动系统中的热位移误差。
    • 9. 发明授权
    • Automatic tool changer
    • 自动换刀
    • US5499963A
    • 1996-03-19
    • US119221
    • 1993-09-28
    • Akihiko FujimotoHisao IshiiShinya OkamotoNaoki Sato
    • Akihiko FujimotoHisao IshiiShinya OkamotoNaoki Sato
    • B23Q3/157
    • B23Q3/15706B23Q3/15534Y10T483/179Y10T483/1795
    • An automatic tool changer for a machine tool comprises a first cam (C.sub.S) for swinging a turret (38) by cooperation with a first cam roller (21) mounted on a back face of the turret (38); a second cam (C.sub.L) for raising and lowering the turret (38) with respect to the spindle head in a direction along a central axis of the spindle of the machine tool; and a link (6, 8, 14, 16) having a second cam roller (22) cooperating with the second cam (C.sub.L), the link raising or lowering the turret (38) with respect to the spindle when the turret (38) is swung by the cooperation between the first cam (C.sub.S) and the first cam roller (21) in order to reduce the shock generated at the spindle and the turret (38) at the tool change.
    • PCT No.PCT / JP93 / 00111 Sec。 371日期:1993年9月28日 102(e)日期1993年9月28日PCT 1993年1月29日PCT公布。 第WO93 / 14901号公报 日期:1993年8月5日。一种用于机床的自动换刀器包括:通过与安装在转架(38)的背面上的第一凸轮辊(21)配合摆动转台(38)的第一凸轮(CS) ; 第二凸轮(CL),用于沿着机床的主轴的中心轴线的方向相对于主轴头升高和降低转台(38); 以及具有与所述第二凸轮(CL)配合的第二凸轮辊(22)的连杆(6,8,14,16),所述连杆相对于所述主轴在所述转台(38)处升高或降低所述转台(38) 通过第一凸轮(CS)和第一凸轮辊(21)之间的配合摆动,以便减少在工具更换时在主轴和转动架(38)处产生的冲击。