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    • 91. 发明申请
    • SENSOR BASED MEANS OF MONITORING THE MECHANICAL CONDITION OF ROTATING MACHINERY THAT OPERATES INTERMITTENTLY
    • 以传感器为基础的监测机械运行间歇性机械状态的手段
    • US20120109580A1
    • 2012-05-03
    • US13286917
    • 2011-11-01
    • Trevor James HolroydDavid Lin
    • Trevor James HolroydDavid Lin
    • G06F15/00
    • G06F15/00G01H1/12G01M13/028
    • A method of monitoring the mechanical condition of a machine in which statistically significant measurements on a characteristic signal are made over a period of time which can include interruptions and variations in the operation of the machine giving rise to uncharacteristic signals and the processing of the signal during the statistically significant measurement automatically excludes those parts of the signal associated with interruptions and variations in the operation of the machine. The invention also includes apparatus for carrying out the above method including a preamplifier, adapted to provide output to a further amplifier, adapted to provided output to dynamic enveloping circuitry, adapted to provide an output to an analogue to digital converter, adapted to provide an output to a digital micro-electronic device.
    • 一种监测机器的机械状态的方法,其中在一段时间内对特征信号进行统计上显着的测量,其可以包括机器操作的中断和变化,引起非特征信号和信号处理 统计学显着的测量自动排除与机器操作中断和变化相关的信号的那些部分。 本发明还包括用于执行上述方法的装置,该装置包括一个前置放大器,适用于向另一个放大器提供输出,适用于向动态封装电路提供输出,适用于向模数转换器提供输出,适用于提供输出 到数字微电子设备。
    • 96. 发明授权
    • Method and apparatus for visualizing elastic wave propagation in a solid substance
    • 可视化固体物质弹性波传播的方法和装置
    • US06535828B1
    • 2003-03-18
    • US09695911
    • 2000-10-26
    • Takashi FurukawaHiroshi YoneyamaYukihiko HoriiNobuo Uesugi
    • Takashi FurukawaHiroshi YoneyamaYukihiko HoriiNobuo Uesugi
    • G01F1700
    • G01H9/002G01H1/12G01H5/00G01H17/00G01N29/265G01N2291/0234G01N2291/0421G01N2291/0422G01N2291/044G01N2291/102G01N2291/2632G01N2291/267
    • A method and an apparatus for visualizing an elastic wave propagation in a solid substance can be applied to a subject substance which is any one of a transparent body and an opaque body, and can detect SV waves (transverse waves) and SH waves (transverse waves) in elastic wave motion modes, and longitudinal waves, surface waves, and creeping waves. The visualization method comprises the steps of: generating elastic waves in a solid substance in response to electric signals; measuring a quantity of stress change in the solid substance in connection with elastic waves propagation in the solid substance; synchronizing a transmission timing of the electric signals with a measurement timing of the stress change; carrying out measurement while scanning a sensor; and imaging wave fronts of the elastic waves propagated in the solid substance by synchronously indicating the stress change as a function of time. The visualization apparatus comprises an elastic wave generator (8) for generating elastic waves in a solid substance (9) in response to an electric signals; an electric signal transmitter (7) for transmitting electric signals to the elastic wave generator (8); a sensor (1) for measuring elastic waves propagated in the solid substance; a sensor scanner (3) for controlling a scanning position of said sensor; a detected-signal recorder (2) for receiving and recording detected-signals from the sensor (1); a synchronizing circuit (10) for sending the detected-signals from the sensor (1) to the recorder (1) in synchronization with timing signals from the sensor scanner (3) and electric signal transmitter (7); and an elastic wave stress distribution display (4) for imaging stress distribution signals of the detected-signals from the detected-signal recorder (2).
    • 用于使固体物质中的弹性波传播可视化的方法和装置可以应用于透明体和不透明体中的任何一个的被检体,并且可以检测SV波(横波)和SH波(横波 )在弹性波运动模式,以及纵波,表面波和爬行波。 可视化方法包括以下步骤:响应于电信号产生固体物质中的弹性波; 测量与固体物质中弹性波传播相关的固体物质的应力变化量; 使电信号的发送定时与应力变化的测量定时同步; 扫描传感器时进行测量; 以及通过同时指示应力变化作为时间的函数在固体物质中传播的弹性波的成像波前面。 可视化装置包括:弹性波发生器(8),用于响应于电信号产生固体物质(9)中的弹性波; 用于向弹性波发生器(8)发送电信号的电信号发射器(7); 传感器(1),用于测量在固体物质中传播的弹性波; 传感器扫描器(3),用于控制所述传感器的扫描位置; 用于从所述传感器(1)接收和记录检测信号的检测信号记录器(2); 与来自传感器扫描器(3)和电信号发射器(7)的定时信号同步地将检测信号从传感器(1)发送到记录器(1)的同步电路(10) 以及用于对来自检测信号记录器(2)的检测信号的应力分布信号进行成像的弹性波应力分布显示(4)。
    • 98. 发明授权
    • Drive line vibration detection system
    • 驱动线振动检测系统
    • US06415667B1
    • 2002-07-09
    • US09515551
    • 2000-02-29
    • Christos T. KyrtsosAlan E. Tousignant
    • Christos T. KyrtsosAlan E. Tousignant
    • G08B2100
    • G01H3/00G01H1/003G01H1/12
    • A device for detecting undesirable vibrations in a vehicle drive line utilizes a sensor that communicates with a controller to indicate undesirable vibrations in a drive line component. In one example, a temperature sensor is placed in a central portion of a universal joint. The temperature sensor preferably is supported within a single housing along with a transmitter that is responsive to the temperature sensor to transmit a signal to a remotely located receiver without using a hardwire connection between the transmitter and receiver. Packaging the temperature sensor, transmitter and a power source within a single housing provides the ability to seal off or close a series of lubrication channels that extend through the universal joint. In another example, a contact-based sensor provides a signal whenever a vibration of a drive line component occurs. The contact-based sensor signal preferably is processed to monitor the number of vibrations over time and a vehicle operator is provided with an indication of the level of vibrations as desired.
    • 用于检测车辆驱动线路中不期望的振动的装置利用与控制器通信的传感器,以指示驱动线路部件中的不期望的振动。 在一个示例中,将温度传感器放置在万向节的中心部分中。 温度传感器优选地被支撑在单个壳体内以及响应于温度传感器的发射器,以将信号发射到位于远程的接收器,而不使用发射器和接收器之间的硬线连接。 在单个外壳内包装温度传感器,变送器和电源可提供密封或封闭一系列通过万向接头延伸的润滑通道的能力。 在另一示例中,每当发生驱动线组件的振动时,基于接触的传感器提供信号。 基于接触的传感器信号优选地被处理以监视随时间的振动次数,并且根据需要向车辆操作者提供振动水平的指示。
    • 99. 发明授权
    • Transducer for measuring acoustic emission events
    • 用于测量声发射事件的传感器
    • US06360608B1
    • 2002-03-26
    • US09519497
    • 2000-03-06
    • Harold L. Dunegan
    • Harold L. Dunegan
    • G01N2914
    • G01N29/2437G01H1/00G01H1/12G01N29/14G01N29/348G01N29/36G01N29/40G01N29/42G01N2291/014G01N2291/02854G01N2291/0289G01N2291/0422G01N2291/0423G01N2291/0427G01N2291/0428G01N2291/2632G10K11/004
    • A method and an apparatus for detecting and measuring cracks in plate-like structures using acoustic emission technique are disclosed. A false aperture transducer is designed to provide a criterion for filtering out extraneous noise in the acoustic emission signal based on modal analysis by computing the ratio of the high-frequency peak amplitude to low-frequency peak amplitude of the signal. A calibration curve correlating crack depth to the amplitude ratio can be obtained by simulating crack growth in a fracture specimen coupled to a test structure or field structure, and measuring acoustic emission signal in the structure by the false aperture transducer. The calibration curve correlates simulated crack depth percentage with computed peak amplitude ratio of the measured signal. Using the calibration curve and acoustic emission signal sensed by a false aperture transducer in a field structure, a crack in the structure can be detected and its depth measured by computing the peak amplitude ratio of the signal and identifying the crack depth that correlates with the ratio from the calibration curve.
    • 公开了一种使用声发射技术检测和测量板状结构中的裂纹的方法和装置。 假孔径传感器被设计为通过计算信号的高频峰值振幅与低频峰值振幅的比例,通过模态分析来提供声发射信号中过滤噪声的标准。 通过模拟耦合到测试结构或场结构的断裂样本中的裂纹扩展,以及通过假孔径传感器测量结构中的声发射信号,可以获得将裂纹深度与振幅比相关的校准曲线。 校准曲线将模拟裂纹深度百分比与计算的测量信号的峰值振幅比相关联。 利用现场结构中的假孔传感器检测到的校准曲线和声发射信号,可以检测到结构中的裂纹,并通过计算信号的峰值振幅比并确定与比率相关的裂纹深度来测量其深度 从校准曲线。