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    • 92. 发明申请
    • CIRCUIT FOR MEASURING THE RESONANT FREQUENCY OF NANORESONATORS
    • 用于测量纳米器件谐振频率的电路
    • US20140312980A1
    • 2014-10-23
    • US14253709
    • 2014-04-15
    • COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
    • Patrick VILLARDGerard BILLIOT
    • H03L7/093
    • H03L7/093B82Y35/00G01G3/16G01N29/036G01N29/22H03B5/30H03L7/02
    • In the field of nanoresonator oscillators or NEMS (nanoelectromechanical systems) oscillators, a circuit is proposed for measuring the oscillation frequency of a resonator, including a phase-locked loop with a frequency-controlled oscillator and a phase comparator. The resonator includes a vibration excitation input and a dynamic polarization input (using strain gauges). The frequency-controlled oscillator applies a polarization frequency f1 to the polarization input. A frequency generator supplies a fixed intermediate frequency FI; a mixer receives the frequencies f1 and FI for producing an excitation frequency f0 that is the sum or difference of f1 and FI. The phase comparator receives the frequency FI and the output signal of the resonator and produces a control signal that is sent to the frequency-controlled oscillator, indirectly locking the oscillation frequency onto the resonant frequency of the resonator.
    • 在纳米谐振器或NEMS(纳米机电系统)振荡器领域,提出了一种用于测量谐振器的振荡频率的电路,包括具有频率控制振荡器和相位比较器的锁相环。 谐振器包括振动激励输入和动态极化输入(使用应变计)。 频率控制振荡器将偏振频率f1施加到偏振输入。 频率发生器提供固定的中频FI; 混频器接收频率f1和FI,以产生作为f1和FI的和或差的激励频率f0。 相位比较器接收频率FI和谐振器的输出信号,并产生发送到频率控制振荡器的控制信号,将振荡频率间接锁定到谐振器的谐振频率上。
    • 96. 发明申请
    • RESONANT MASS SENSOR
    • 共振质量传感器
    • US20140234171A1
    • 2014-08-21
    • US14081573
    • 2013-11-15
    • Incorporated National University Iwate University
    • Masaki Yamaguchi
    • G01N19/00
    • G01N19/00G01N29/022G01N29/036G01N2291/0255G01N2291/0256Y10T436/11
    • A separate excitation and high sensitive resonant type mass sensor is provided. The resonant type mass sensor 1 includes: an oscillator 3; an vibrator 2 placed on the oscillator 3; and a detecting unit 5 for detecting the resonant frequency of the vibrator 2, and is characterized in that the vibrator 2 and the oscillator 3 are not coupled mechanically and that the vibrator 2 is not mechanically coupled to any members. The vibration of the vibrator 2 is represented by a standing wave. The vibrator 2 includes a molecular recognition means for recognizing the molecules of a substance to be measured. The molecular recognition means may collect specific molecules by antigen-antibody reaction. The vibrator 2 may include at least a magnetizable part. To the magnetizable part, magnetic beads 26, to which an antibody or antigen is immobilized, may be adsorbed magnetically. The detecting unit 5 is made up of a light-emitting device and a photo-sensitive device, and may include a means to detect any one of frequency, displacement, velocity, and acceleration.
    • 提供单独的激发和高灵敏度共振型质量传感器。 谐振型质量传感器1包括:振荡器3; 放置在振荡器3上的振动器2; 以及用于检测振动器2的谐振频率的检测单元5,其特征在于振动器2和振荡器3没有机械耦合,并且振动器2没有机械耦合到任何构件。 振动器2的振动由驻波表示。 振动器2包括用于识别待测物质的分子的分子识别装置。 分子识别方法可以通过抗原 - 抗体反应收集特定的分子。 振动器2可以至少包括可磁化部分。 对于可磁化部分,可以磁性吸附抗体或抗原固定于其上的磁珠26。 检测单元5由发光装置和感光装置构成,并且可以包括检测频率,位移,速度和加速度中的任何一种的装置。