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    • 2. 发明授权
    • Microwave thickness measurement and apparatus
    • 微波厚度测量及仪器
    • US6005397A
    • 1999-12-21
    • US291354
    • 1994-08-16
    • Reza ZoughiSasan Bakhtiari
    • Reza ZoughiSasan Bakhtiari
    • G01B15/02G01N22/00G01N22/02G01R27/04
    • G01B15/02G01N22/00G01N22/02
    • The thickness of the layers of rubber covering the steel belts within a tire can be measured by transmitting a microwave signal toward the outer surface of the tire and measuring the phase shift of the signal reflected by the tire. In the preferred embodiment, a waveguide is used to direct the microwave signal toward the tire. A standing wave is created within the waveguide by interference between the transmitted microwave signal and the microwave signal reflected from the tire. A series of crystal detectors mounted along the length of the waveguide measure the standing wave. A processor calculates the phase of the reflection coefficient, and determines the thickness of the rubber layer as a predetermined function of the phase. By proper selection of the microwave frequency and the spacing between the waveguide and the tire, the rubber layer thickness can be uniquely determined as a function of phase for any range of rubber thicknesses likely to be encountered in a tire. In addition, a phase reversal (from 180.degree. to -180.degree.) can be arranged to occur at a specific rubber thickness by proper selection of these parameters. This can be used in the tire retreading process to halt buffing when a predetermined minimum rubber thickness has been reached.
    • 覆盖轮胎内的钢带的橡胶层的厚度可以通过向轮胎的外表面传递微波信号并测量由轮胎反射的信号的相移来测量。 在优选实施例中,使用波导将微波信号引向轮胎。 通过所传输的微波信号和从轮胎反射的微波信号之间的干扰,在波导内产生驻波。 沿着波导长度安装的一系列晶体探测器测量驻波。 处理器计算反射系数的相位,并将橡胶层的厚度确定为相位的预定函数。 通过适当选择微波频率和波导与轮胎之间的间距,橡胶层的厚度可以作为相位的函数唯一确定,可以在轮胎中可能遇到的任何橡胶厚度范围。 此外,通过适当选择这些参数,可以将反相(从180°至-180°)排列成特定的橡胶厚度。 当达到预定的最小橡胶厚度时,这可以用于轮胎翻新过程中以停止抛光。
    • 5. 发明授权
    • Microwave steel belt location sensor for tires
    • 用于轮胎的微波钢带定位传感器
    • US5216372A
    • 1993-06-01
    • US960238
    • 1992-10-13
    • Reza ZoughiSasan Bakhtiari
    • Reza ZoughiSasan Bakhtiari
    • G01B15/02G01N22/00G01N22/02
    • G01B15/02G01N22/00G01N22/02
    • The thickness of the layers of rubber covering the steel belts within a tire can be measured by transmitting a microwave signal toward the outer surface of the tire and measuring the phase shift of the signal reflected by the tire. In the preferred embodiment, a waveguide is used to direct the microwave signal toward the tire. A standing wave is created within the waveguide by interference between the transmitted microwave signal and the microwave signal reflected from the tire. A series of crystal detectors mounted along the length of the waveguide measure the standing wave. A processor calculates the phase of the reflection coefficient, and determines the thickness of the rubber layer as a predetermined function of the phase. By proper selection of the microwave frequency and the spacing between the waveguide and the tire, the rubber layer thickness can be uniquely determined as a function of phase for any range of rubber thicknesses likely to be encountered in a tire. In addition, a phase reversal (from 180.degree. to - 180.degree. ) can be arranged to occur at a specific rubber thickness by proper selection of these parameters. This can be used in the tire retreading process to halt buffing when a predetermined minimum rubber thickness has been reached.
    • 覆盖轮胎内的钢带的橡胶层的厚度可以通过向轮胎的外表面传递微波信号并测量由轮胎反射的信号的相移来测量。 在优选实施例中,使用波导将微波信号引向轮胎。 通过所传输的微波信号和从轮胎反射的微波信号之间的干扰,在波导内产生驻波。 沿着波导长度安装的一系列晶体探测器测量驻波。 处理器计算反射系数的相位,并将橡胶层的厚度确定为相位的预定函数。 通过适当选择微波频率和波导与轮胎之间的间距,橡胶层的厚度可以作为相位的函数唯一确定,可以在轮胎中可能遇到的任何橡胶厚度范围。 此外,可以通过适当选择这些参数,将相位反转(从180°至-180°)设置为以特定橡胶厚度发生。 当达到预定的最小橡胶厚度时,这可以用于轮胎翻新过程中以停止抛光。
    • 9. 发明授权
    • Millimeter wave sensor for on-line inspection of thin sheet dielectrics
    • 毫米波传感器用于薄片电介质的在线检测
    • US5886534A
    • 1999-03-23
    • US927363
    • 1997-09-09
    • Sasan BakhtiariNachappa GopalsamiApostolos C. Raptis
    • Sasan BakhtiariNachappa GopalsamiApostolos C. Raptis
    • G01N22/02G01R29/08G01R27/04
    • G01R29/0878G01N22/02
    • A millimeter wave sensor is provided for non-destructive inspection of thin sheet dielectric materials. The millimeter wave sensor includes a Gunn diode oscillator (GDO) source generating a mill meter wave electromagnetic energy signal having a single frequency. A heater is coupled to the GDO source for stabilizing the single frequency. A small size antenna is coupled to the GDO source for transmitting the millimeter wave electromagnetic energy signal to a sample material and for receiving a reflected millimeter wave electromagnetic energy signal from the sample material. Ferrite circulator isolators coupled between the GDO source and the antenna separate the millimeter wave electromagnetic energy signal into transmitted and received electromagnetic energy signal components and a detector detects change in both amplitude and phase of the transmitted and received electromagnetic energy signal components.
    • 提供毫米波传感器用于对薄片介电材料进行非破坏性检查。 毫米波传感器包括产生具有单个频率的毫米波电磁能信号的耿氏二极管振荡器(GDO)源。 加热器耦合到GDO源以稳定单个频率。 将小尺寸天线耦合到GDO源,用于将毫米波电磁能信号传输到样品材料并用于从样品材料接收反射的毫米波电磁能信号。 耦合在GDO源和天线之间的铁氧体循环器隔离器将毫米波电磁能信号分离成发射和接收的电磁能量信号分量,检测器检测发射和接收的电磁能量信号分量的幅度和相位的变化。
    • 10. 发明授权
    • Millimeter wave sensor for monitoring effluents
    • 用于监测污水的毫米波传感器
    • US5468964A
    • 1995-11-21
    • US262998
    • 1994-06-20
    • Nachappa GopalsamiSasan BakhtiariApostolos C. RaptisStephen L. Dieckman
    • Nachappa GopalsamiSasan BakhtiariApostolos C. RaptisStephen L. Dieckman
    • G01N22/00
    • G01N22/00
    • A millimeter-wave sensor for detecting and measuring effluents from processing plants either remotely or on-site includes a high frequency signal source for transmitting frequency-modulated continuous waves in the millimeter or submillimeter range with a wide sweep capability and a computer-controlled detector for detecting a plurality of species of effluents on a real time basis. A high resolution spectrum of an effluent, or effluents, is generated by a deconvolution of the measured spectra resulting in a narrowing of the line widths by 2 or 3 orders of magnitude as compared with the pressure broadened spectra detected at atmospheric pressure for improved spectral specificity and measurement sensitivity. The sensor is particularly adapted for remote monitoring such as where access is limited or sensor cost restricts multiple sensors as well as for large area monitoring under nearly all weather conditions.
    • 用于从远程或现场检测和测量来自处理设备的流出物的毫米波传感器包括用于以宽扫描能力在毫米或亚毫米范围内发射调频连续波的高频信号源,以及计算机控制的检测器 实时检测多种流出物。 通过测量光谱的去卷积产生流出物或流出物的高分辨率光谱,导致与在大气压下检测到的压力扩展光谱相比,线宽缩小2或3个数量级,以改善光谱特异性 和测量灵敏度。 传感器特别适用于远程监控,例如访问受限或传感器成本限制了多个传感器以及几乎所有天气条件下的大面积监控。