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    • 11. 发明授权
    • Resonance-enhanced dielectric sensing of chemical and biological species
    • 化学和生物物种的共振增强介电传感
    • US07223608B2
    • 2007-05-29
    • US10637127
    • 2003-08-08
    • Nachappa GopalsamiApostolos C. Raptis
    • Nachappa GopalsamiApostolos C. Raptis
    • G01N27/00
    • G01N22/00
    • A dielectric sensing method and apparatus are provided for detection and classification of chemical and biological materials. Resonance patterns of a sample within a resonator are detected for identifying a shift in resonance frequency and a change of line width before and after introduction of the sample. The identified shift in resonance frequency and change of line width are used for determining a complex dielectric constant of the sample for the material detection and classification. A degree of selectivity at any excitation frequency is enabled for the dielectric sensing method from the manner in which the complex dielectric constant of a material affects the resonance pattern of the resonator with respect to shift in resonance frequency and the change in line width. By selecting the excitation frequencies to generally correspond to one of the resonance frequencies of the sample material under test, the degree of selectivity and the sensitivity of detection are enhanced.
    • 提供了用于化学和生物材料的检测和分类的电介质感测方法和装置。 检测谐振器内的样本的共振图案,用于识别在引入样本之前和之后谐振频率的偏移和线宽的变化。 识别的谐振频率偏移和线宽的变化用于确定材料检测和分类的样品的复介电常数。 介质感测方法可以根据材料的复介电常数相对谐振频率的偏移和线宽的变化影响谐振器的谐振模式,从而使得任何激发频率下的选择性程度得以实现。 通过选择一般对应于被测样品的共振频率之一的激发频率,增强了选择性和检测灵敏度。
    • 12. 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。
    • 13. 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。
    • 16. 发明申请
    • Resonance-enhanced dielectric sensing of chemical and biological species
    • 化学和生物物种的共振增强介电传感
    • US20050032233A1
    • 2005-02-10
    • US10637127
    • 2003-08-08
    • Nachappa GopalsamiApostolos Raptis
    • Nachappa GopalsamiApostolos Raptis
    • G01N22/00G01N27/00
    • G01N22/00
    • A dielectric sensing method and apparatus are provided for detection and classification of chemical and biological materials. Resonance patterns of a sample within a resonator are detected for identifying a shift in resonance frequency and a change of line width before and after introduction of the sample. The identified shift in resonance frequency and change of line width are used for determining a complex dielectric constant of the sample for the material detection and classification. A degree of selectivity at any excitation frequency is enabled for the dielectric sensing method from the manner in which the complex dielectric constant of a material affects the resonance pattern of the resonator with respect to shift in resonance frequency and the change in line width. By selecting the excitation frequencies to generally correspond to one of the resonance frequencies of the sample material under test, the degree of selectivity and the sensitivity of detection are enhanced.
    • 提供了用于化学和生物材料的检测和分类的电介质感测方法和装置。 检测谐振器内的样本的共振图案,用于识别在引入样本之前和之后谐振频率的偏移和线宽的变化。 识别的谐振频率偏移和线宽的变化用于确定材料检测和分类的样品的复介电常数。 介质感测方法可以根据材料的复介电常数相对谐振频率的偏移和线宽的变化影响谐振器的谐振模式,从而使得任何激发频率下的选择性程度得以实现。 通过选择一般对应于被测样品的共振频率之一的激发频率,增强了选择性和检测灵敏度。