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    • 54. 发明申请
    • Method and apparatus for performing computed tomography
    • 用于执行计算机断层摄影的方法和装置
    • US20060056577A1
    • 2006-03-16
    • US10940924
    • 2004-09-14
    • Frank HuntKaname SasakiShigeru Oho
    • Frank HuntKaname SasakiShigeru Oho
    • H05G1/60A61B6/00
    • G01N23/046A61B6/4458G01N2223/419
    • An apparatus for performing computed tomography having a radiation source and at least one radiation detector spaced from the radiation source and which generates an output signal representative of the strength of the received radiation from the radiation source. A part support for holding a plurality of parts is positioned in between the radiation source and the detectors. The part support is rotatably mounted about an axis generally perpendicular to a vector between the radiation source and the detectors so that, upon rotation of the part support, the radiation detectors generate an output signal corresponding to the internal structure of parts supported on the part support. A computer system receives the output signals from the detectors and, under program control, generates a report of the internal structure of the parts on the part support.
    • 一种用于执行计算机断层摄影的装置,具有辐射源和与辐射源间隔开的至少一个辐射检测器,并且产生表示来自辐射源的接收辐射的强度的输出信号。 用于保持多个部件的部件支撑件位于辐射源和检测器之间。 部件支撑件围绕大致垂直于辐射源和检测器之间的矢量的轴线可旋转地安装,使得在部件支撑件旋转时,辐射检测器产生对应于支撑在部件支撑件上的部件的内部结构的输出信号 。 计算机系统接收来自检测器的输出信号,并在程序控制下产生部件支持部件内部结构的报告。
    • 57. 发明授权
    • System and method for compensation of contamination of a heated element in a heated element gas flow sensor
    • 用于补偿加热元件气体流量传感器中加热元件污染的系统和方法
    • US06756571B2
    • 2004-06-29
    • US10273050
    • 2002-10-17
    • George SaikalisShigeru Oho
    • George SaikalisShigeru Oho
    • H05B102
    • G01F1/6983F02D41/187G01F1/6965G01N27/18
    • A system for compensation of contamination of a heated element in a heated element gas flow system in which the heated element becomes heated from an ambient temperature to an elevated temperature upon the application of electrical power to the heated element during a startup time period. The system includes a processing circuit having an input and an output. A voltage signal from the heated element is connected to the input of the processing circuit. The processing circuit reads a plurality of temporally spaced input signals as data from the processing circuit input during the startup time period. The processing circuit then computes the parameters of a transfer function corresponding to the data on its input. The processing circuit then calculates a contamination correction factor as a function of at least one parameter of the transfer function. The processing circuit then utilizes the correction factor to modify a measured gas flow rate by the gas flow meter after the heated element attains the elevated steady state temperature to compensate for contamination of the heated element.
    • 一种用于补偿加热元件气体流动系统中被加热元件的污染的系统,其中在启动时间段期间将加热的元件从环境温度加热到升高的温度。 该系统包括具有输入和输出的处理电路。 来自加热元件的电压信号连接到处理电路的输入端。 处理电路在启动时间周期期间从作为处理电路输入的数据读出多个时间间隔的输入信号。 然后,处理电路计算与其输入上的数据相对应的传递函数的参数。 然后,处理电路计算作为传递函数的至少一个参数的函数的污染校正因子。 然后,处理电路利用校正因子在加热元件达到升高的稳态温度之后通过气体流量计来修改测量的气体流量,以补偿被加热元件的污染。
    • 58. 发明授权
    • Time domain measurement and control system for a hot wire air flow sensor
    • 热线气流传感器的时域测量和控制系统
    • US06453739B1
    • 2002-09-24
    • US09393395
    • 1999-09-10
    • George SaikalisShigeru OhoMarco diPierro
    • George SaikalisShigeru OhoMarco diPierro
    • G01F168
    • G01F1/6986
    • A time domain measurement and control system for a hot wire air flow sensor is disclosed in which the air flow sensor is of the type having a resistive heating element with an input end and an output end. The control system includes a fixed frequency variable width pulse generator which generates a pulse train through the heating element. This pulse train, furthermore, has a first predetermined voltage amplitude. The output voltage amplitude of the pulse train is determined at the outlet end of the heating element while a control circuit varies the duty cycle of the pulse train to maintain the output voltage amplitude at a second predetermined voltage level. The duty cycle of the pulse train is proportional to the air flow rate through the air flow sensor. In a modification of the invention, a fixed width variable frequency pulse train is generated through the resistive heating element and the frequency of the pulse train is varied to maintain the output voltage amplitude of the pulse train at the outlet end of the resistive heating element at a second predetermined voltage level. In this modification, the frequency of the pulse train is proportional to the air flow rate through the air flow sensor.
    • 公开了一种用于热丝空气流量传感器的时域测量和控制系统,其中空气流量传感器具有具有输入端和输出端的电阻加热元件的类型。 控制系统包括固定频率可变宽度脉冲发生器,其通过加热元件产生脉冲串。 此外,该脉冲串具有第一预定电压幅度。 在加热元件的出口端确定脉冲串的输出电压幅值,同时控制电路改变脉冲串的占空比,将输出电压振幅维持在第二预定电压电平。 脉冲串的占空比与通过空气流量传感器的空气流量成比例。 在本发明的变形例中,通过电阻加热元件产生固定宽度的可变频率脉冲串,并且改变脉冲串的频率,以将电阻加热元件的出口端的脉冲序列的输出电压振幅保持在 第二预定电压电平。 在该变型中,脉冲串的频率与通过空气流量传感器的空气流量成比例。