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40 条记录 (耗时 0.012 秒)

    Abnormality diagnosis apparatus
    12.
    发明授权
    Abnormality diagnosis apparatus 有权

    公开(公告)号：US10605837B2

    公开(公告)日：2020-03-31

    申请号：US15902385

    申请日：2018-02-22

    申请人： DENSO CORPORATION

    发明人： Kotaro Nakashima ,  Takashi Suzuki ,  Masaya Taki ,  Yohei Kaneda

    IPC分类号： G01R19/03 ,  G01R19/00 ,  G01R31/327 ,  G01R31/00 ,  G01R31/40

    摘要： An abnormality diagnosis apparatus performs: a first step of diagnosing a shortage of precharge voltage or a short-circuit failure between electrodes of a capacitor based on a detection value of a precharge voltage detection circuit in a state where a first relay and a second relay are turned off, and a precharge circuit is operated; a second step of diagnosing, after a normal determination in the first step, a disconnection failure of a precharge path based on the detection value of the precharge voltage detection circuit or a detection value of an inter-relay voltage detection circuit in a state where the first relay and the second relay are turned off, and the precharge circuit is not operated; and a relay failure diagnosis step of diagnosing, after a normal determination in the second step, a short-circuit failure and an open failure of the first relay or the second relay.

    Spectrum analyzer using multiple intermediate frequencies and multiple clock configurations for residual, spurious and image signal reduction
    13.
    发明授权
    Spectrum analyzer using multiple intermediate frequencies and multiple clock configurations for residual, spurious and image signal reduction 有权
    频谱分析仪使用多个中频和多个时钟配置，用于残留，杂散和图像信号降低

    公开(公告)号：US08977519B2

    公开(公告)日：2015-03-10

    申请号：US13026876

    申请日：2011-02-14

    申请人： Justin Crooks

    发明人： Justin Crooks

    IPC分类号： G01R19/02 ,  G06G7/20 ,  G01R19/03 ,  G01R23/16

    CPC分类号： G01R23/16 ,  G01R19/02

    摘要： A spectrum analyzer for measuring an RF signal over a selected frequency span configured to use multiple Intermediate Frequencies (IFs) for residual, spurious and image signal reduction. The spectrum analyzer has both a primary IF path and a secondary IF path configured to provide band pass filtering of the IF signals. A master clock synthesizer is configured to reduce residual noise by providing from a single Voltage Controlled Oscillator, a master clock signal and a Local Oscillator (LO) signal. The spectrum analyzer has a microcontroller configured to change the frequency of the master clock signal and the LO signal if the center frequency of the selected span is sufficiently close to a known spurious signal.

    摘要翻译： 一种频谱分析仪，用于测量所选频率范围上的RF信号，配置为使用多个中频（IF）进行残留，杂散和图像信号降低。 频谱分析仪具有主IF路径和辅助IF路径，其被配置为提供IF信号的带通滤波。 主时钟合成器被配置为通过从单个压控振荡器，主时钟信号和本地振荡器（LO）信号提供来减少残留噪声。 频谱分析仪具有微控制器，其被配置为如果所选择的跨距的中心频率足够接近已知的寄生信号，则改变主时钟信号和LO信号的频率。

    Electrothermal conversion elements, apparatus and methods for use in comparing, calibrating and measuring electrical signals
    14.
    发明授权
    Electrothermal conversion elements, apparatus and methods for use in comparing, calibrating and measuring electrical signals 失效
    电热转换元件，用于比较，校准和测量电信号的装置和方法

    公开(公告)号：US5783805A

    公开(公告)日：1998-07-21

    申请号：US366674

    申请日：1994-12-30

    申请人： Fred L. Katzmann

    发明人： Fred L. Katzmann

    IPC分类号： G01R19/03 ,  G01R19/22 ,  H05B1/02 ,  G01R5/26

    CPC分类号： G01R19/03 ,  G01R19/225 ,  G01R19/22

    摘要： Electrothermal conversion elements, apparatus and methods for use in comparing, calibrating and measuring electrical signals utilizing a thin film heater on a thin, low mass, low thermal conductivity substrate and low mass thermoresistive or PN junction thermal radiation sensors. The element emits IR radiation in response to electrical input. The radiation is collected and converted to an electrical signal proportional to the RMS value of the input signal. Isothermal operation enhances both IR and electrical operation.

    摘要翻译： 电热转换元件，用于比较，校准和测量利用薄薄的低质量低导热衬底上的薄膜加热器和低质量热电阻或PN结热辐射传感器的电信号的电热转换元件，装置和方法。 该元件响应于电气输入发出红外辐射。 收集辐射并将其转换成与输入信号的RMS值成比例的电信号。 等温操作增强了IR和电气操作。

    Electrothermal conversion elements, apparatus and methods for use in comparing, calibrating and measuring electrical signals
    15.
    发明授权
    Electrothermal conversion elements, apparatus and methods for use in comparing, calibrating and measuring electrical signals 失效
    电热转换元件，用于比较，校准和测量电信号的装置和方法

    公开(公告)号：US5378873A

    公开(公告)日：1995-01-03

    申请号：US894103

    申请日：1992-06-05

    申请人： Fred L. Katzmann

    发明人： Fred L. Katzmann

    IPC分类号： G01R19/03 ,  G01R19/22 ,  H05B1/02

    CPC分类号： G01R19/03 ,  G01R19/225 ,  G01R19/22

    摘要： Electrothermal conversion elements, apparatus and methods for use in comparing, calibrating and measuring electrical signals. The element emits IR radiation in response to electrical input. The radiation is collected and converted to an electrical signal proportional to the RMS value of the input signal. Isothermal operation enhances both IR and electrical operation.

    摘要翻译： 电热转换元件，用于比较，校准和测量电信号的装置和方法。 该元件响应于电气输入发出红外辐射。 收集辐射并将其转换成与输入信号的RMS值成比例的电信号。 等温操作增强了IR和电气操作。

    True rms converter
    17.
    发明授权
    True rms converter 失效
    真有效值转换器

    公开(公告)号：US3624525A

    公开(公告)日：1971-11-30

    申请号：US3624525D

    申请日：1969-11-20

    申请人： HEWLETT PACKARD CO

    发明人： SMITH WILLIAM G

    IPC分类号： G01R5/22 ,  G01R19/03 ,  G01R19/22 ,  G06G7/20

    CPC分类号： G01R19/225 ,  G01R5/22 ,  G01R19/03

    摘要： A pair of thermocouples having elements connected respectively to receive an applied signal and the output signal of an amplifier are connected to apply the resultant thermocouple signals to the input of the amplifier in polarity opposition. An additional feedback signal which varies directly with the output level of the amplifier and which has a square-law characteristic similar to the thermocouple elements is applied to the input of the amplifier to reduce the effects of signal level on the response time of the circuit and allow ultralow signal frequencies to be accurately measured.