公开(公告)号：US06879613B2

公开(公告)日：2005-04-12

申请号：US10187480

申请日：2002-07-02

Applicant: Kanji Takeuchi ,  Kenji Sahara

Inventor： Kanji Takeuchi ,  Kenji Sahara

IPC: G11B7/125 ,  H01S5/20 ,  H01S5/223 ,  H01S5/343 ,  H01S5/00

CPC classification number: H01S5/2231 ,  H01S5/2004 ,  H01S2301/18

Abstract: A laser diode capable of reducing a radiating angle θ⊥ in the vertical direction, an optical pickup device, an optical disk apparatus, and optical communications equipment, all equipped with the laser diode which increases optical coupling efficiency. It has a first cladding layer of the first conductive type formed on a substrate, with an active layer on top of the first cladding layer and a second cladding layer of the second conductive type on top of the active layer. In at least the first or second cladding layer, it is formed of at least one optical guide layer having a higher refractive index than the first or second cladding layer and operating to expand a beam waist in the waveguide. This operation contributes to widening a region in which to shut up light, enabling a radiating angle θ⊥ in the vertical direction to be reduced.

公开(公告)号：US5828973A

公开(公告)日：1998-10-27

申请号：US616632

申请日：1996-03-15

Applicant: Kanji Takeuchi ,  Takeshi Sawada

Inventor： Kanji Takeuchi ,  Takeshi Sawada

IPC: B62D5/04 ,  B62D6/10

CPC classification number: B62D5/0466

Abstract: An electric power steering apparatus for recovering a steering wheel to its neutral position based on the speeds of the steered wheels of a vehicle. In response to a steering torque signal from a torque sensor, assisting torque by a motor is controlled in a torque servo system from a phase compensating filter to a current detecting unit. A microcomputer calculates a speed ratio of left and right wheels based on wheel speeds detected by wheel speed sensors. Recovery compensating torque is obtained from the speed ratio of the left and right wheels, and a corresponding signal is output to an addition calculating unit. The addition calculating unit adds the steering torque signal and the signal representing the recovery compensating torque to obtain a recovery compensated signal. Based on the recovery compensated signal, the assisting torque is controlled to recover the steering to its neutral position.

Abstract translation: 一种用于基于车辆的转向轮的速度将方向盘恢复到其中立位置的电动助力转向装置。 响应于来自转矩传感器的转向转矩信号，由电动机的辅助转矩在相位补偿滤波器到电流检测单元的转矩伺服系统中被控制。 微型计算机基于由车轮速度传感器检测到的车轮速度来计算左右车轮的速比。 从左右车轮的速比获得恢复补偿扭矩，相应的信号输出到加法运算部。 相加计算单元将转向转矩信号和表示恢复补偿转矩的信号相加以获得恢复补偿信号。 基于恢复补偿信号，控制辅助扭矩以将转向恢复到其中立位置。