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    • 3. 发明授权
    • Method and apparatus for detecting abnormal magnetic head fly height
    • 用于检测异常磁头飞高的方法和装置
    • US06671110B2
    • 2003-12-30
    • US09776360
    • 2001-02-02
    • Sachiyo BabaYukio FukushimaHidetsugu TankaTetsuo Ueda
    • Sachiyo BabaYukio FukushimaHidetsugu TankaTetsuo Ueda
    • G11B2736
    • G11B21/21G11B5/012G11B5/6029
    • A method and apparatus for detecting an abnormal fly height of a magnetic head. The method includes reproducing a servo signal recorded on a magnetic disk in advance by the magnetic head when a write operation for writing data on the magnetic disk by the magnetic head is initiated. Next, the gain of the servo signal based on the head part of the servo signal reproduced by the magnetic head is determined. The gain of the servo signal is then compared with a reference value to detect an abnormal fly height of the magnetic head. In an advantageous embodiment, the reference value is the gain of a servo signal determined when the fly height of the magnetic head is normal. Alternatively, in other advantageous embodiments, the reference value is based on the gain of a previous servo signal.
    • 一种用于检测磁头的异常飞行高度的方法和装置。 该方法包括当通过磁头写入磁盘上的数据的写入操作时,由磁头预先再现记录在磁盘上的伺服信号。 接下来,确定基于由磁头再现的伺服信号的头部的伺服信号的增益。 然后将伺服信号的增益与参考值进行比较,以检测磁头的异常飞行高度。 在有利的实施例中,参考值是当磁头的飞行高度正常时确定的伺服信号的增益。 或者,在其他有利的实施例中,参考值基于先前伺服信号的增益。
    • 4. 发明授权
    • Dummy write method for a magnetic head and drive unit for carrying out the method
    • 用于执行该方法的磁头和驱动单元的虚拟写入方法
    • US06441982B1
    • 2002-08-27
    • US09448234
    • 1999-11-24
    • Yukio FukushimaTetsuo UedaHideo Asano
    • Yukio FukushimaTetsuo UedaHideo Asano
    • G11B509
    • G11B5/00G11B5/012G11B2005/0008G11B2005/0013G11B2005/0021
    • A drive unit which recovers from write instability by heating the magnetic head prior to performing a dummy write operation is described. In the preferred embodiments, once write instability has been detected the head may be heated by friction with the rotating disk or by an external heater. In the friction method the head is moved to a safe area of the disk such as a textured landing zone while the disk rotation is continued. In drives using unload ramps, a heater is preferably placed at the the ramp so that the head can be heated while parked on the ramp. In each of these embodiments dummy write operations are performed while the head is in a thermally excited state due to the heating. The combination of heating and the dummy write operation aids in restoring write stability.
    • 描述通过在执行虚拟写入操作之前加热磁头而从写入不稳定性恢复的驱动单元。 在优选实施例中,一旦检测到写入不稳定性,头部可以通过与旋转盘的摩擦或外部加热器的摩擦来加热。 在摩擦方法中,当盘旋转持续时,头移动到盘的安全区域,例如纹理着陆区。 在使用卸载斜坡的驱动器中,优选地将加热器放置在斜坡处,使得头部可以在停放在斜坡上时被加热。 在这些实施例的每一个中,由于加热,头部处于热激发状态时执行伪写入操作。 加热和虚拟写入操作的组合有助于恢复写入稳定性。
    • 5. 发明授权
    • Road surface condition detector for automotive vehicle
    • 汽车路面状态检测仪
    • US5521594A
    • 1996-05-28
    • US201429
    • 1994-02-24
    • Yukio Fukushima
    • Yukio Fukushima
    • B60K23/04B60G17/0165B60K23/08B60T8/172G01H3/12G01S15/88G08G1/00
    • G01S15/60B60G17/0165B60T8/172G01H3/12B60T2210/12B60T2250/04
    • A road surface condition detector for detecting a dry/wet condition of a road surface includes an ultrasonic wave receiver 2 for picking up the ultrasonic noise generated by a road wheel tire 1, which increases conspicuously when the R is wet. The output of the ultrasonic wave receiver 2 is amplified by a amplifier 21, and the absolute level thereof is detected by an absolute level detector 22, and the absolute level is smoothed by a received-wave intensity detector 20. The smoothed signal is compared with a reference voltage Vt to determine the road surface condition. Preferably, the reference voltage Vt is varied in accordance with the vehicle speed. When the automotive vehicle is provided with ultrasonic wave transmitter/receiver units 3a and 3b, the ultrasonic noise component is extracted from the received signal by an ultrasonic noise intensity detector circuit 40, and the extracted component is compared with a reference voltage level to determine the road surface condition.
    • 用于检测路面的干/湿条件的路面状况检测器包括用于拾取由轮胎1产生的超声波噪声的超声波接收器2,当R为湿时,其显着增加。 超声波接收器2的输出由放大器21放大,其绝对电平由绝对电平检测器22检测,绝对电平由接收波强度检测器20平滑化。平滑信号与 参考电压Vt来确定路面状况。 优选地,参考电压Vt根据车速而变化。 当机动车辆设置有超声波发射器/接收器单元3a和3b时,通过超声波噪声强度检测器电路40从接收信号中提取超声波噪声分量,并将提取的分量与参考电压电平进行比较,以确定 路面状况
    • 7. 发明授权
    • Changeover valve and gas transportation pipe system
    • 切换阀和输气管道系统
    • US06601610B1
    • 2003-08-05
    • US10043185
    • 2002-01-14
    • Seiki MitomoYukio FukushimaMasaaki MiyamotoShoken Takahashi
    • Seiki MitomoYukio FukushimaMasaaki MiyamotoShoken Takahashi
    • F16K1107
    • F16K11/0853B65G53/56Y10T137/86871Y10T137/87804
    • It is an object of the present invention to provide a changeover valve which is capable of preventing granular material from being crushed when the granular material is transported by gas through a pipe system, and more particularly a changeover valve which is capable of preventing grain from being crushed, broken, and chipped when the grain such as rice is transported by gas through the pipe system. It is another object of the present invention to provide a gas transportation pipe system for grain to which the changeover valve is applied. The changeover valve according to the present invention comprises: a valve disc in a cylinder shape including on a side part thereof a through passage which is connected to transportation passages on an upstream side and a downstream side and which is in an eccentric position deviated from a center of the cylinder; a casing for rotatably accommodating the valve disc therein; and a pair of discharge passages which are provided in the casing and connected to the through passage of the valve disc, and an inside diameter of an introducing passage of the changeover valve at an output end thereof is smaller than an inside diameter of the through passage of the valve disc and an inside diameter of the introducing passage in an output side part has a shape gradually decreasing in size toward the downstream side while an inside diameter of each of the pair of the discharge passages at an input end thereof is larger than the inside diameter of the through passage of the valve disc and an inside diameter of each of the pair of the discharge passages in an input side part has al shape gradually increasing in size toward the upstream side.
    • 本发明的目的是提供一种切换阀,其能够在粒状材料通过管道系统被气体输送时能够防止颗粒状物料被粉碎,特别是能够防止颗粒物变形的切换阀 当稻米等粮食通过管道系统输送时,粉碎,破碎和碎裂。 本发明的另一个目的是提供一种用于施加切换阀的颗粒的气体输送管道系统。 根据本发明的切换阀包括:气缸形状的阀盘,其在其侧部包括通孔,该通道连接到上游侧和下游侧的输送通道,该偏心位置偏离 圆筒中心; 一个可旋转地容纳阀盘的壳体; 以及一对排出通道,其设置在壳体中并连接到阀盘的贯通通道,并且其输出端处的转换阀的引入通道的内径小于通孔的内径 并且输出侧部分中的引导通道的内径具有朝向下游侧逐渐减小的形状,而在其输入端的一对排出通道中的每一个的内径大于 阀盘的贯通通道的内径和输入侧部分的一对排出通道的每一个的内径的尺寸朝向上游侧逐渐增大。
    • 8. 发明授权
    • Disk drive with off-track write prevention
    • 磁盘驱动器,具有非磁道写入防止功能
    • US06496315B1
    • 2002-12-17
    • US09448233
    • 1999-11-24
    • Tetsuo UedaYukio FukushimaTatsuya Sakai
    • Tetsuo UedaYukio FukushimaTatsuya Sakai
    • G11B1504
    • G11B5/59627G11B5/59688
    • A disk drive with the capability to prevent off-track writing with reduced false triggering is described. An improved method of predicting the position of a head is used to determine whether the head is on or off-track. A position error signal at an nth servo position Pn and a velocity Vn at the nth servo position (Vn=Pn−Pn−1) are calculated using values read at the nth and n−1 head positions. Based on these Pn and Vn and on the output of the servo controller at the nth servo position Un, the predicted PESn+1 is calculated as: Predicted PESn+1=Pn+Vn+kUn where k is a constant. Data is inhibited from being written between the nth servo position and the (n+1) servo position, when absolute values of the calculated Pn, Vn, and predicted PESn+1 meet any condition of the following conditions (1) through (3): (1) |Pn|>C1, (2) |Vn|>C2, and (3) |Predicted PESn+1>C3 where C1, C2, and C3 are constants determined for the embodiment.
    • 描述了一种能够以减少错误触发来防止偏离写入的能力的磁盘驱动器。 使用预测头部位置的改进方法来确定头部是开启还是离开轨迹。 使用在第n和第n-1个头部位置读取的值来计算第n个伺服位置Pn处的位置误差信号和第n个伺服位置处的速度Vn(Vn = Pn-Pn-1)。 基于这些Pn和Vn以及在第n个伺服位置Un处的伺服控制器的输出,预测的PESn + 1被计算为:其中k是常数。禁止数据写入第n个伺服位置和( n + 1)伺服位置,当计算的Pn,Vn和预测的PESn + 1的绝对值满足以下条件(1)至(3)的任何条件时:(1)| Pn |> C1,(2)| Vn |> C2和(3)|预测的PESn + 1> C3,其中C1,C2和C3是为实施例确定的常数。
    • 10. 发明授权
    • Gas transportation method for grain
    • 粮食输送方式
    • US06637982B2
    • 2003-10-28
    • US10043184
    • 2002-01-14
    • Yukio FukushimaMasaaki MiyamotoSeiki MitomoTatsunori SaigusaShoken Takahashi
    • Yukio FukushimaMasaaki MiyamotoSeiki MitomoTatsunori SaigusaShoken Takahashi
    • B65G5300
    • B65G53/66
    • It is an object of the present invention to provide a method which is capable of reducing a crushing rate of grain when the grain such as rice is transported by means of gas through pipes. The temperature of the grain in a grain accommodation tank which is connected to a transportation pipe for grain is measured. A temperature signal indicating this temperature is sent to control means, which determines the temperature of transportation gas so that a difference between this temperature and the temperature of the grain is within a predetermined range. The determined temperature is transmitted to an intercooler so that the temperature of the transportation gas which is sent from a blower and flows through the transportation pipe is controlled to be at the determined specific temperature. Transportation of the grain by means of the transportation gas at this temperature prevents the grain from crushing.
    • 本发明的目的是提供一种当通过管道将气体通过水稻输送的时候能够降低谷粒的破碎率的方法。 测量与谷物输送管连接的谷物容纳槽中的谷物的温度。 指示该温度的温度信号被发送到控制装置,控制装置确定输送气体的温度,使得该温度与谷物温度之间的差在预定范围内。 将确定的温度传递到中间冷却器,使得从鼓风机送出并流经输送管的输送气体的温度被控制在确定的特定温度。 在这种温度下通过运输气体运输谷物可防止颗粒破碎。