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    • 32. 发明授权
    • Electronic speed control system for vehicles
    • 汽车电子调速系统
    • US4359125A
    • 1982-11-16
    • US159854
    • 1980-06-16
    • Yoshio ShinodaAkira KunoTakeshi Matsui
    • Yoshio ShinodaAkira KunoTakeshi Matsui
    • F02D41/14B60K31/06B60K31/10F02D29/02F02D31/00G05D13/62B60K31/00
    • F02D31/002B60K31/107
    • In a speed control system for vehicles, a speed difference calculation circuit calculates an absolute value of a time difference between a predetermined period of time corresponding with a desired speed and an instant period of time corresponding with the actual speed, an acceleration calculation circuit calculates an absolute value of a time difference between the respective instant periods of time, and a correction signal generator calculates a sum of the absolute values in consideration with the actual speed when each sign of the calculated time differences is positive or negative and calculates a difference between the absolute values in consideration with the actual speed when respective signs of the calculated time differences are opposite to each other. The signal generator selectively produces correction signals related to the calculated sum and the calculated difference. A distribution circuit produces a control signal in response to the respective correction signals, and an actuator controls the opening angle of the engine throttle in response to the control signal.
    • 在车辆的速度控制系统中,速度差计算电路计算与期望速度对应的预定时间段与对应于实际速度的瞬时时间段之间的时间差的绝对值,加速度计算电路计算 并且当计算出的时间差的每个符号为正或负时,校正信号发生器考虑实际速度来计算绝对值的和,并且计算出 当计算出的时间差的各个符号彼此相反时,考虑实际速度的绝对值。 信号发生器选择性地产生与计算出的和和计算出的差相关的校正信号。 分配电路响应于各自的校正信号产生控制信号,并且致动器响应于控制信号控制发动机节气门的打开角度。
    • 34. 发明授权
    • Ultrasonic wave transmitter/receiver
    • 超声波发射器/接收器
    • US4139834A
    • 1979-02-13
    • US811441
    • 1977-06-29
    • Takeshi MatsuiMatatoyo Hinachi
    • Takeshi MatsuiMatatoyo Hinachi
    • G01S7/526G01S7/529G01S9/66G01S7/66
    • G01S7/526Y10S367/903
    • An ultrasonic wave transmitter/receiver wherein an ultrasonic wave transducer is connected to a radiating ultrasonic wave carrier frequency oscillator through a switching means during transmission, while the ultrasonic wave transducer is connected to an operational amplifier and a band pass filter through the switching means during reception, comprises an impedance conversion circuit at an input of the operational amplifier to form a band pass amplifier of a low input impedance. By this arrangement, a receiving sensitivity near an antiresonance frequency of the transducer is reduced to lower the receiving sensitivity for noise, but without sacrificing an echo receiving sensitivity thereof, and a stable receiving operation is assured for possible change in a characteristic of the transducer.
    • 一种超声波发射器/接收器,其中超声波传感器在传输期间通过切换装置连接到辐射超声波载波频率振荡器,而超声波传感器在接收期间通过开关装置连接到运算放大器和带通滤波器 包括在运算放大器的输入处的阻抗转换电路,以形成低输入阻抗的带通放大器。 通过这种布置,减小了传感器反共振频率附近的接收灵敏度,以降低接收灵敏度的噪声,而不会牺牲其回波接收灵敏度,并且确保传感器的特性可能改变的稳定的接收操作。