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    • 1. 发明授权
    • Optical apparatus and method for detecting the top dead center position
of an engine piston
    • 用于检测发动机活塞的上止点位置的光学装置和方法
    • US4661695A
    • 1987-04-28
    • US708813
    • 1985-03-05
    • Satoshi MoriTsuneyuki EgamiKouichi MoriHidetaka NohiraKunimasa Yoshimura
    • Satoshi MoriTsuneyuki EgamiKouichi MoriHidetaka NohiraKunimasa Yoshimura
    • G01M15/04F02B23/00F02D45/00F02P5/145F02P17/04G01M15/06H01J5/16
    • G01M15/06F02P17/04F02P5/1455Y02T10/46
    • A position detector for detecting the piston TDC position in a piston engine has a cylindrical casing penetrating the top wall defining a combustion chamber of the engine and fixed thereto, a light emission element, a light reception element each being accommodated within the upper half of the casing, an inlet optical fiber connected to the light emission element and an outlet optical fiber connected to the light reception element. These optical fibers are inserted into the lower half of the casing. The lower end of each optical fiber is opposed to the upper surface of the piston at a predetermined distance therefrom when the piston is located in the vicinity of the TDC position. The light emitted by the light emission element is applied to the upper surface of the piston, after passing the inlet optical fiber. The reflected light from the upper surface of the piston is received and sent to the light reception element by the outlet optical fiber. The light reception element transmits a light reception signal corresponding to the amount of the received light to the detecting circuit. The detecting circuit detects peaks of the light reception signal, which appear before and after the piston TDC position, calculates the half of the rotating angle of a crankshaft between two adjacent peaks and transmits a TDC piston detecting signal when the crankshaft rotates by the calculated rotating angle from the time the preceding peak out of two adjacent peaks appearing in the following period is detected.
    • 用于检测活塞发动机中的活塞TDC位置的位置检测器具有穿过限定发动机的燃烧室并固定到其上的顶壁的圆柱形壳体,发光元件,光接收元件,每个发光元件容纳在 壳体,连接到发光元件的入口光纤和连接到光接收元件的出口光纤。 这些光纤插入到壳体的下半部。 当活塞位于TDC位置附近时,每个光纤的下端与活塞的上表面相距预定距离。 在通过入射光纤后,由发光元件发射的光被施加到活塞的上表面。 来自活塞上表面的反射光被出射光纤接收并发送到光接收元件。 光接收元件将与接收到的光量对应的光接收信号发送到检测电路。 检测电路检测在活塞TDC位置之前和之后出现的光接收信号的峰值,计算两个相邻峰值之间的曲轴的旋转角的一半,并且当曲轴旋转时传递TDC活塞检测信号所计算的旋转 检测出在下一个周期中出现的两个相邻峰值之前的峰值时间的角度。
    • 8. 发明授权
    • Bearingless rotary machine
    • 无轴承旋转机
    • US06078119A
    • 2000-06-20
    • US199338
    • 1998-11-25
    • Tadashi SatohMasaru OhsawaSatoshi Mori
    • Tadashi SatohMasaru OhsawaSatoshi Mori
    • F16C39/06H02K7/09H02K11/04H02K17/16F16C32/04
    • F16C32/0497F16C32/0444H02K11/33H02K7/09
    • An object of the present invention is to provide a bearingless rotary machine which is capable of stably controlling the levitated position of a rotor of an induction motor even if the rotor comprises a squirrel-cage type rotor that is simple in structure and can easily be manufactured.A bearingless rotary machine has a rotor having secondary current paths and a stator spaced from the rotor by a gap. The stator has two kinds of windings for imparting a rotating and a levitating and supporting force to the rotor. The rotary machine has a magnetic field command calculator, magnetic flux distribution detecting means and correcting means for adjusting the detected control magnetic flux distribution to coincide with the magnetic field distribution command.
    • 本发明的目的是提供一种能够稳定地控制感应电动机的转子的悬浮位置的无轴承旋转机械,即使转子包括结构简单且容易制造的鼠笼式转子 。 无轴承旋转机具有具有次级电流路径的转子和与转子间隔开的定子。 定子具有两种绕组,用于向转子施加旋转和悬浮和支撑力。 旋转机具有磁场指令计算器,磁通分布检测装置和校正装置,用于调整检测到的控制磁通量分布以与磁场分布指令一致。