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    • 1. 发明授权
    • Machine tool
    • 机床
    • US07503691B2
    • 2009-03-17
    • US11404858
    • 2006-04-17
    • Kunio KojimaSusumu Maekawa
    • Kunio KojimaSusumu Maekawa
    • G01K1/20
    • G05B19/404B23Q11/0007B23Q17/22G05B2219/37285G05B2219/42281G05B2219/49214
    • A machine tool capable of detecting an ambient temperature change without a detector for detecting the ambient temperature and capable of detecting an abnormality of a temperature detector for detecting the motor temperature. Motor temperature Ti (i=1, 2 . . . n) and the current feedback Ifi of each motor are read out from the temperature detector for detecting the temperature of each motor of the machine tool. The heating value Qi of each motor is obtained from current feedback Ifi. Motor temperature Ti is calculated and estimated from the heating value Q. Difference ΔTi between the estimated motor temperature Tmi and the detected temperature Tsi is obtained. When difference between maximum and minimum values of difference ΔTi exceeds the first threshold value β, a temperature detector abnormality is outputted. When it is equal to or less than the first threshold value β, the mean value ΔT′ of differences is obtained. If the mean value ΔT′ is equal to or less than the second threshold value γ, it is determined that there is no abnormality. If it is equal to or more than the second threshold value γ, the indication that the ambient temperature has been changed is outputted.
    • 一种能够检测环境温度变化的机床,其不需要用于检测环境温度的检测器,并且能够检测用于检测电动机温度的温度检测器的异常。 从温度检测器读出电机温度Ti(i = 1,2,...,n)和每个电机的电流反馈Ifi,以检测机床各电机的温度。 每个电动机的发热值Qi从电流反馈Ifi获得。 根据发热值Q计算出电动机温度Ti,并求出估算出的电动机温度Tmi与检测温度Tsi之间的差ΔTi。 当差值DeltaTi的最大值和最小值之间的差超过第一阈值β时,输出温度检测器异常。 当它等于或小于第一阈值β时,获得差值的平均值ΔT'。 如果平均值DeltaT'等于或小于第二阈值γ,则确定没有异常。 如果等于或大于第二阈值γ,则输出环境温度已被改变的指示。
    • 2. 发明授权
    • Apparatus and method for thermal displacement correction for a machine tool
    • 机床热位移修正装置及方法
    • US06456896B1
    • 2002-09-24
    • US09101022
    • 1998-06-29
    • Susumu ItoMasao KamiguchiHisao IshiiMasanobu TakemotoSusumu MaekawaKunio Kojima
    • Susumu ItoMasao KamiguchiHisao IshiiMasanobu TakemotoSusumu MaekawaKunio Kojima
    • G06F1900
    • G05B19/404B23Q3/15534
    • The position of a feed shaft is monitored, the mean moving speed and moving frequency of the feed shaft are measured with every unit time for position correction, and a correction amount &dgr;n is determined from the speed and frequency according to an approximation formula and updated (c7 and c8). A position correction amount for a commanded position is determined from this correction amount, and the commanded position is corrected by the position correction amount (c1 to c6). The position correction amount for the commanded position is determined from this correction amount, and the commanded position is corrected by this position correction amount. Since the correction amount is determined according to the approximation formula, thermal displacement correction can be effected at all times without requiring any sensor. When the correction amount changes substantially (c10), the thermal displacement is measured by means of a sensor and used as the correction amount (c11 and c12), whereby accuracy is improved. The frequency of measurement by means of sensors is reduced, so that the machining time can be reduced.
    • 监视进给轴的位置,每单位时间测量进给轴的平均移动速度和移动频率以进行位置校正,并根据近似公式从速度和频率确定校正量deltan,并更新( c7和c8)。 根据该修正量确定指示位置的位置校正量,并且通过位置校正量(c1〜c6)校正指令位置。 根据该修正量确定指令位置的位置校正量,并且通过该位置校正量校正指令位置。 由于根据近似公式确定校正量,所以可以始终进行热位移校正,而不需要任何传感器。 当校正量基本上变化(c10)时,通过传感器测量热位移并将其用作校正量(c11和c12),从而提高精度。 通过传感器测量的频率降低,从而可以减少加工时间。
    • 3. 发明申请
    • Machine tool
    • US20060247888A1
    • 2006-11-02
    • US11404858
    • 2006-04-17
    • Kunio KojimaSusumu Maekawa
    • Kunio KojimaSusumu Maekawa
    • G01K3/00
    • G05B19/404B23Q11/0007B23Q17/22G05B2219/37285G05B2219/42281G05B2219/49214
    • A machine tool capable of detecting an ambient temperature change without a detector for detecting the ambient temperature and capable of detecting an abnormality of a temperature detector for detecting the motor temperature. Motor temperature Ti (i=1, 2 . . . n) and the current feedback Ifi of each motor are read out from the temperature detector for detecting the temperature of each motor of the machine tool. The heating value Qi of each motor is obtained from current feedback Ifi. Motor temperature Ti is calculated and estimated from the heating value Q. Difference ΔTi between the estimated motor temperature Tmi and the detected temperature Tsi is obtained. When difference between maximum and minimum values of difference ΔTi exceeds the first threshold value β, a temperature detector abnormality is outputted. When it is equal to or less than the first threshold value β, the mean value ΔT′ of differences is obtained. If the mean value ΔT′ is equal to or less than the second threshold value γ, it is determined that there is no abnormality. If it is equal to or more than the second threshold value γ, the indication that the ambient temperature has been changed is outputted.
    • 6. 发明申请
    • Electomagnetic field generating element, information recording/reproducing head and information recording/reproducing apparatus
    • 电磁场产生元件,信息记录/再现头和信息记录/重放装置
    • US20090106783A1
    • 2009-04-23
    • US12316592
    • 2008-12-12
    • Shintaro MiyanishiNaoyasu IketaniKunio Kojima
    • Shintaro MiyanishiNaoyasu IketaniKunio Kojima
    • G11B11/00G11B7/08
    • G11B11/10536G11B5/1278G11B5/314G11B7/1387G11B11/10541G11B11/1058G11B2005/0002G11B2005/0021
    • The present invention provides an electromagnetic field generating element, an information recording/reproducing head, and an information recording/reproducing apparatus. The electromagnetic field generating element makes it possible to restrain magnetic field attenuation or magnetic field delay in a high frequency recording/reproducing head for use in thermally assisted magnetic field recording/reproduction using a near field. The information recording/reproducing head and the information recording/reproducing apparatus can carry out high frequency magnetic recording/reproducing.The electromagnetic field generating element of the present invention includes: (i) a substrate, (ii) conductors each provided on the substrate and each serving as a supporting section, (iii) a plate-like-shaped conductor provided on the conductors and (iv) a semiconductor laser element provided on the substrate. The semiconductor laser element irradiated, to the plate-like-shaped conductor, laser light substantially parallel to an extending flat surface of the plate-like-shaped conductor. This causes generation of the near field in the plate-like-shaped conductor. Moreover, a magnetic field is generated by supplying a current to the plate-like-shaped conductor.
    • 本发明提供一种电磁场产生元件,信息记录/再现头和信息记录/再现装置。 电磁场产生元件使得可以抑制在使用近场的热辅助磁场记录/再现中使用的高频记录/再现头中的磁场衰减或磁场延迟。 信息记录/再现头和信息记录/再现装置可以执行高频磁记录/再现。 本发明的电磁场产生元件包括:(i)基板,(ii)各自设置在基板上并各自用作支撑部分的导体,(iii)设置在导体上的板状导体和( iv)设置在基板上的半导体激光元件。 半导体激光元件对板状导体照射基本上平行于板状导体的延伸平坦表面的激光。 这导致板状导体中的近场的产生。 此外,通过向板状导体供给电流来产生磁场。
    • 10. 发明授权
    • Media selecting device
    • 媒体选择设备
    • US06236398B1
    • 2001-05-22
    • US09019817
    • 1998-02-06
    • Kunio KojimaMamoru OdaTakeshi Hashimoto
    • Kunio KojimaMamoru OdaTakeshi Hashimoto
    • G06F300
    • G06F3/04815G06F3/0362G06F2203/04802
    • A media selecting device enabling a user to easily select any desired one of a plurality of selectable media. The media selecting device according to the present invention can easily select any one of a plurality of hierarchically-related icons by turning a rotary disk-type knob. The user presses a first change-over button to access the icon selected by the disk-type knob, and to display icons of a lower hierarchical layer or to display a deciding medium represented by icons. The user can press a second change-over button to cancel the selected icon, and to display icons of an upper hierarchical layer. Furthermore, the displayed icons have different three-dimensional shape and location information, and are disposed in a three-dimensional virtual space, thus increasing visibility and control of the device.
    • 一种媒体选择装置,使得用户能够容易地选择多个可选媒体中的任何所需的一个。 根据本发明的媒体选择装置可以通过转动旋转盘式旋钮来容易地选择多个分层相关图标中的任何一个。 用户按下第一切换按钮以访问由盘型旋钮选择的图标,并且显示下层的图标或显示由图标表示的决定介质。 用户可以按第二个切换按钮取消所选图标,并显示上层图标。 此外,显示的图标具有不同的三维形状和位置信息,并且被布置在三维虚拟空间中,从而增加了设备的可见性和控制。