公开(公告)号：US20130030726A1

公开(公告)日：2013-01-31

申请号：US13194568

申请日：2011-07-29

申请人： Andrew THOMAS ,  Marc DULAC

发明人： Andrew THOMAS ,  Marc DULAC

IPC分类号： G06F19/00 ,  G01N29/48

CPC分类号： G01N29/32 ,  G01N29/36 ,  G01N29/4436

摘要： Disclosed are a method and an NDT/NDI inspection device deploying digital circuitry to conduct detection and compensation of phase and amplitude shift in responding signals. A digital waveform generator, such as a direct digital synthesizer (DDS) is used to generate a digital sine-wave of a specific frequency and amplitude, mimicking the pulser frequency and amplitude. The sine-wave is converted to analog signal through a DAC and transmitted to the transducer. The received analog sine-wave from the transducer is converted back to a digital signal through an ADC. The transmitted and received digital signals are then compared for phase and amplitude differences. A null circuit involving another waveform generating component is employed to compensate the detected phase and amplitude differences. As a result the phase and amplitude differences are effectively eliminated before being further processed and analyzed for defects information.

摘要翻译： 公开了一种方法和NDT / NDI检测装置，其部署数字电路以进行响应信号中的相位和幅度偏移的检测和补偿。 诸如直接数字合成器（DDS）的数字波形发生器用于产生特定频率和幅度的数字正弦波，模拟脉冲发生器的频率和振幅。 正弦波通过DAC转换为模拟信号并传输到传感器。 来自传感器的接收到的模拟正弦波通过ADC转换回数字信号。 然后将发送和接收的数字信号进行相位和幅度差分比较。 采用涉及另一个波形发生部件的零电路来补偿检测到的相位和幅度差异。 因此，在进一步处理和分析缺陷信息之前，相位和幅度差异被有效地消除。

公开(公告)号：US20090225083A1

公开(公告)日：2009-09-10

申请号：US12399670

申请日：2009-03-06

申请人： Andrew R. THOMAS ,  Steven BESSER ,  Daniel KASS ,  Erich HENJES ,  Ehab GHABOUR ,  Marc DULAC ,  Paul J. DeANGELO

发明人： Andrew R. THOMAS ,  Steven BESSER ,  Daniel KASS ,  Erich HENJES ,  Ehab GHABOUR ,  Marc DULAC ,  Paul J. DeANGELO

IPC分类号： G06T11/20 ,  G06F15/00

CPC分类号： G01R13/02 ,  G01R13/029 ,  G06K9/00543

摘要： A peak visualization enhancement system for use with a non-destructive inspection (NDI) instrument using a digital display which replicates the haloing effect of analog cathode ray tube (CRT) displays. A peak detection algorithm is provided which intelligently selects the peak values from within the uncompressed digitized waveform while taking measures to prevent noise spikes and the like from being identified as valid waveform peaks. The digital display then highlights the identified peaks, or a subset of the identified peaks, on the compressed waveform display. In this way the effect of bright spots (halos) about the zero slope points on a waveform displayed on an analog CRT is replicated in a digitally compressed waveform display.

摘要翻译： 一种用于使用数字显示器的非破坏性检查（NDI）仪器的峰值可视化增强系统，其复制模拟阴极射线管（CRT）显示器的晕圈效应。 提供了一种峰值检测算法，其在采取措施以防止噪声尖峰等被识别为有效波形峰值的情况下智能地从未压缩的数字化波形内选择峰值。 然后，数字显示器会在压缩波形显示屏上突出显示所识别的峰值或所识别峰值的子集。 以这种方式，在数字压缩的波形显示中复制了在模拟CRT上显示的波形上零点斜率点上的亮点（光晕）的影响。