公开(公告)号：US06532821B2

公开(公告)日：2003-03-18

申请号：US09901659

申请日：2001-07-11

申请人： Guy Lamouche ,  Andre Moreau ,  Martin Lord ,  Daniel Levesque

发明人： Guy Lamouche ,  Andre Moreau ,  Martin Lord ,  Daniel Levesque

IPC分类号： G01N2916

CPC分类号： G01N29/2418 ,  G01N29/38 ,  G01N29/42 ,  G01N29/4418 ,  G01N29/4472 ,  G01N2291/015 ,  G01N2291/0289

摘要： A method is disclosed for evaluating the physical properties of a sample, for example, the grain size in a polycrystalline material. An ultrasound field is generated in a local region of the sample with a non-contact source, such as a pulsed laser, such that the generated ultrasound diffuses away from said local region. After waiting until the generated ultrasound field has reached a diffusion regime, the resulting ultrasound field is measured with a non-contact detector. Parameters are adjusted in a mathematical model describing the predicted behaviour of the ultrasound field in the diffusion regime to fit the detected ultrasound field to the mathematical model. In this way, parameters dependent on the physical properties of the sample, such as the diffusion coefficient and absorption coefficient, can be derived. The grain size, for example, can be estimated from these parameters preferably by calibrating the diffusion coefficient to grain size.

摘要翻译： 公开了用于评估样品的物理性质的方法，例如多晶材料中的晶粒尺寸。 在具有非接触源（例如脉冲激光）的样品的局部区域中产生超声波场，使得所产生的超声波从所述局部区域扩散。 在等待直到产生的超声波场达到扩散方式后，用非接触检测器测量所得的超声波场。 在描述超声场在扩散状态中的预测行为的数学模型中调整参数以将检测到的超声场拟合到数学模型。 以这种方式，可以得出取决于样品的物理性质的参数，如扩散系数和吸收系数。 例如，可以从这些参数估计晶粒尺寸，优选通过将扩散系数校准为晶粒尺寸。

公开(公告)号：US06795191B2

公开(公告)日：2004-09-21

申请号：US10038983

申请日：2002-01-04

申请人： George H. Barbehenn

发明人： George H. Barbehenn

IPC分类号： G01N2916

CPC分类号： B41J11/0095 ,  B41J11/009

摘要： A print media sensor (10) according to the present invention determines a print medium type by utilizing an ultrasonic transducer (22) to vibrate a print medium (28) at a resonant frequency of the print medium (28). The print medium (28) is irradiated with light from an LED (20). Sensors (24, 26) measure the amount of light reflected from and transmitted through the print medium (28) while it is being vibrated at the resonant frequency. The ratio of the reflected to transmitted light is compared to a stored table of ratios that are associated with the resonant frequencies of specific print medium types and print medium ink volume and application rates. The results of these comparisons are used to determine the print medium type and the associated ink volume and application rate to be used for printing on the print medium (28).

摘要翻译： 根据本发明的打印介质传感器（10）通过利用超声波换能器（22）以打印介质（28）的共振频率振动打印介质（28）来确定打印介质类型。 用来自LED（20）的光照射打印介质（28）。 传感器（24,26）在以共振频率振动时测量从打印介质（28）反射和透射的光的量。 将反射光和透射光的比率与与特定打印介质类型的共振频率和打印介质墨水量和施加率相关联的比率的存储表进行比较。 这些比较的结果用于确定打印介质类型以及用于在打印介质（28）上打印的相关墨水量和应用速率。

公开(公告)号：US06752018B2

公开(公告)日：2004-06-22

申请号：US10159267

申请日：2002-06-03

申请人： Jeffrey Scott Goldmeer ,  Simon Ralph Sanderson

发明人： Jeffrey Scott Goldmeer ,  Simon Ralph Sanderson

IPC分类号： G01N2916

CPC分类号： G01N29/46 ,  G01N29/09 ,  G01N29/2462 ,  G01N2291/02872 ,  G01N2291/044 ,  G01N2291/103

摘要： In one embodiment of the present invention, an apparatus for characterizing an acoustic impedance of an engineering component acoustically coupled to an acoustic waveguide includes: a pressure measurement apparatus adapted to be moved and to be disposed to measure pressure signals, the pressure signals being measured at respective ones of a plurality of predetermined locations along the acoustic waveguide; an exciter adapted to excite the acoustic waveguide with an excitation signal; a data collection module adapted to incorporate the pressure signals from the pressure measurement apparatus into a pressure signal set; a transform module adapted to transform the pressure signal set to a frequency domain set; a wave shape identifier adapted to identify a plurality of wave shape parameters from the frequency domain set; and a statistical computer adapted to compute from the frequency domain set a statistical measure for the wave shape parameters, the statistical measure being selected from the group consisting of residual variance, correlation coefficient, F-statistic, p-statistic, and confidence interval.

摘要翻译： 在本发明的一个实施例中，用于表征声学耦合到声波导的工程部件的声阻抗的装置包括：压力测量装置，适于移动并被设置成测量压力信号，压力信号是在 沿着声波导的多个预定位置中的相应的一个; 激励器，其适于用激励信号激励声波导; 数据收集模块，适于将来自压力测量装置的压力信号并入压力信号组; 变换模块，其适于将所述压力信号集合变换为频域集合; 波形标识符，用于从所述频域集中识别多个波形参数; 以及适于从频域计算出的波形参数的统计测量的统计计算机，所述统计测量从由残差方差，相关系数，F统计量，p统计量和置信区间组成的组中选择。

公开(公告)号：US06601451B1

公开(公告)日：2003-08-05

申请号：US09885506

申请日：2001-06-20

申请人： Ronald Allen Roberts

发明人： Ronald Allen Roberts

IPC分类号： G01N2916

CPC分类号： G01N29/38 ,  G01N29/041 ,  G01N29/075 ,  G01N29/12 ,  G01N29/348 ,  G01N2291/014 ,  G01N2291/015 ,  G01N2291/0423 ,  G01N2291/048 ,  G01N2291/102

摘要： Presented is a system and method for performing highly sensitive measurement of ultrasonic attenuation in small material volumes. The invention allows the mapping of the variations on the surface of a specimen with a high spatial resolution. An ultrasonic transmitter and receiver transmit an ultrasonic signal through a material volume, receive the transmitted pulse, and then re-transmit the received pulse again through the same material volume. The system establishes an oscillating circuit by establishing a positive feedback loop by connecting the transmitter to the receiver with appropriate gain. This oscillating circuit contains the propagation through the material as a component in the signal path. Such a system and method may be employed to aid in the recovery of stamped or engraved serial numbers that have been removed through machining. Such recovery is useful for law enforcement, particularly in tracing weapons and auto parts that have been involved in a crime.

摘要翻译： 提出了一种用于在小材料体积中执行超声波衰减的高灵敏度测量的系统和方法。 本发明允许以高空间分辨率对样本表面上的变化进行映射。 超声波发射器和接收器通过材料体积传输超声波信号，接收发送的脉冲，然后通过相同的材料体积重新发送接收到的脉冲。 该系统通过以适当的增益将发射机连接到接收机来建立正反馈回路来建立振荡电路。 该振荡电路包含作为信号路径中的分量的材料的传播。 可以采用这种系统和方法来帮助恢复通过机械加工去除的冲压或雕刻的序列号。 这种复原对于执法尤其在追查涉嫌犯罪的武器和汽车零部件方面是有用的。

公开(公告)号：US06378375B1

公开(公告)日：2002-04-30

申请号：US09413501

申请日：1999-10-06

申请人： Wataru Kobayashi

发明人： Wataru Kobayashi

IPC分类号： G01N2916

CPC分类号： G01N29/09 ,  G01N29/11 ,  G01N2291/012 ,  G01N2291/0245 ,  G01N2291/044 ,  G01N2291/101

摘要： This invention intends to provide a method for inspecting an inner state of an object by determining whether or not any foreign matter is generated inside the object material without being affected by any outside state of the object. This method comprises irradiating waveform of ultrasonic wave to an object whose inner state is desired to be inspected from outside, extracting waveform of a reflected wave traveling inside the object, detecting a difference of acoustic impedance of the foreign matter from the waveform of the reflected wave by extracting a deflection of the waveform and detecting for presence/absence of the foreign matter inside the object or presence/absence of the foreign matter and a quantity of the foreign matter.

摘要翻译： 本发明旨在提供一种用于通过确定在物体内部是否产生任何异物而不受对象的任何外部状态的影响来检查物体的内部状态的方法。 该方法包括将超声波的波形照射到需要从外部检查内部状态的物体，提取在物体内行进的反射波的波形，检测异物的声阻抗与反射波的波形 通过提取波形的偏转并检测物体内/异物的存在/不存在，异物的存在/不存在以及异物的量。