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    • 3. 发明申请
    • Method and apparatus for ultrasonic sizing of particles in suspensions
    • 悬浮液中颗粒超声波定径的方法和装置
    • US20040060356A1
    • 2004-04-01
    • US10433868
    • 2003-06-04
    • David Mark Scott
    • G01N015/04G01N015/06G01N015/02G01N029/20G01N029/02
    • G01N15/0255G01N15/02G01N29/036G01N29/11G01N29/348G01N29/46G01N2291/02416G01N2291/0422G01N2291/0428G01N2291/045G01N2291/048G01N2291/102
    • A particle size distribution monitor, comprising: a transducer adapted to be a source of ultrasonic energy and positioned in contact with a suspension containing a percent by volume of particles in a liquid, the transducer transmitting ultrasonic energy through the suspension wherein the energy comprises a wideband pulse containing a range of frequency components; a transducer adapted to be a receiver of ultrasonic energy and positioned in contact with said suspension to receive said wideband range of ultrasonic energy which has passed through the suspension; a first means adapted to accept a signal from said receiver and make an instantaneous determination of the attenuation of the wideband ultrasonic energy in passing through the suspension. A method of monitoring the particle size distribution of particles in a suspension under dynamic conditions, comprising the steps of: transmitting a first pulse of ultrasonic energy containing a wideband range of frequency components through the suspension which attenuates the pulse; receiving the attenuated pulse after it has passed through the suspension; developing a first signal representative of the attenuated first pulse; digitizing the first signal with a high speed analog-to-digital converter to form a time domain signal; applying a Fourier transform to convert the time domain signal to an equivalent frequency domain signal, or spectrum, for each signal; converting the spectrum into dB to express the attenuation as a function of frequency.
    • 一种粒度分布监测器,包括:换能器,其适于作为超声波能量源并且定位成与液体中含有一定体积比例的颗粒的悬浮液接触,所述换能器通过所述悬浮液传递超声能量,其中所述能量包括宽带 包含频率分量范围的脉冲; 换能器,其适于作为超声能量的接收器并且定位成与所述悬架接触以接收已经通过所述悬架的所述宽带范围的超声波能量; 第一装置,适于接收来自所述接收机的信号,并且对穿过悬架的宽带超声波能量的衰减进行瞬时确定。 一种在动态条件下监测悬浮液中颗粒的粒度分布的方法,包括以下步骤:通过使脉冲衰减的悬浮液传输包含宽带范围的频率分量的超声波能量的第一脉冲; 在衰减脉冲通过悬架后接收衰减脉冲; 开发代表衰减的第一脉冲的第一信号; 用高速模数转换器数字化第一信号以形成时域信号; 对每个信号应用傅里叶变换将时域信号转换成等效的频域信号或频谱; 将频谱转换成dB,以表示作为频率的函数的衰减。
    • 5. 发明申请
    • System and method for the inspection of adhesive
    • 用于粘合剂检查的系统和方法
    • US20040103721A1
    • 2004-06-03
    • US10308975
    • 2002-12-03
    • The Boeing Company
    • Gary E. Georgeson
    • G01N029/10G01N029/20
    • G01N29/11G01N29/28G01N2291/0428G01N2291/044
    • A system for inspecting adhesive in a composite structure, such as for soft or improperly cured regions, includes a transducer and a processing element. The transducer can transmit a signal, such as an ultrasonic signal, into the adhesive such that at least a portion of the ultrasonic signal can propagate through the adhesive, reflect off of an interface between the adhesive and another material, and propagate back through the adhesive. Upon exiting the adhesive, then, the transducer can receive a reflected portion of the ultrasonic signal. Thereafter, the processing element can identify a defect, such as soft or improperly cured regions, in the adhesive upon a relationship of an amplitude of the reflected portion of the reflected ultrasonic signal to a predefined threshold.
    • 用于检查复合结构中的粘合剂的系统,例如软或不正确固化的区域,包括换能器和处理元件。 换能器可以将诸如超声波信号的信号传送到粘合剂中,使得超声波信号的至少一部分可以通过粘合剂传播,从粘合剂和另一种材料之间的界面反射,并且通过粘合剂传播回来 。 当离开粘合剂时,换能器可以接收超声信号的反射部分。 此后,处理元件可以根据反射的超声波信号的反射部分的幅度与预定阈值的关系来识别粘合剂中的缺陷,例如软或不正确固化的区域。