公开(公告)号：US20080118026A1

公开(公告)日：2008-05-22

申请号：US11664603

申请日：2005-10-25

申请人： Teresa Ainsworth ,  Yuriy Bro ,  Frederick Cash ,  Gary Dickinson ,  Scott Eggerth ,  Tom Erb ,  Jeffrey Ferguson ,  David Gessner ,  Bruce Herbes ,  Kevin Johnson ,  Sergey Moskalenko ,  Lorna Lockman ,  Doug Schmidt

发明人： Teresa Ainsworth ,  Yuriy Bro ,  Frederick Cash ,  Gary Dickinson ,  Scott Eggerth ,  Tom Erb ,  Jeffrey Ferguson ,  David Gessner ,  Bruce Herbes ,  Kevin Johnson ,  Sergey Moskalenko ,  Lorna Lockman ,  Doug Schmidt

IPC分类号： G01N23/083

CPC分类号： G01N23/06 ,  G01N33/02 ,  G01N2223/618

摘要： A contaminant detection machine (1) including a conveyor (3) which causes an object under inspection (79) to pass through a plane (48) of emitted x-ray radiation. The plane is generated by an x-ray tube (55) that emits a lateral beam, thereby permitting the distance (88) between the x-ray tube and the object under inspection to be reduced. A photo diode arch mounting assembly (104) is placed above the object under inspection and is mated to a collimator assembly (125) that also serves as the mounting bracket for the x-ray generation assembly (38), thereby preserving optical alignment between the photo diode detector array (28) and the emitted x-ray plane (48). The detector array (28) scans the object under inspection (79) so as to produce a continuous series of discrete lines, each line being analyzed by an image processing unit (116) to determine the presence or absence of a contaminant. The conveyor (3) passes over a pair of slider bed surfaces (155, 156) which are mounted in a hinged manner such that the leading edge (168) of one surface (156) is parallel to and spaced apart from the trailing edge (172) of the other surface (155), thereby creating a gap that is coplanar with the collimation slot (129) and the emitted x-ray plane (48). Each bed surface (155, 156) is rigidly constrained within open ended mounting brackets (159, 160, 161 and 162) yet can be removed by hand without the use of tools. Similarly, the conveyor (3) is supported by a roller assembly (182) that includes a tracking block (142) and pivot pin (143) which permits the roller assembly to be mounted to and removed from flip up mounts (151, 152) by hand and without the need of tools. Graphical user interfaces (249, 260, 261, 266, 275, 282 and 288) permit a user to operate the machine (1) by means of a liquid crystal display touch screen (20).

公开(公告)号：US07450686B2

公开(公告)日：2008-11-11

申请号：US11664603

申请日：2005-10-25

申请人： Teresa Ainsworth ,  Yuriy Bro ,  Frederick Cash ,  Gary Dickinson ,  Scott Eggerth ,  Tom Erb ,  Jeffrey Ferguson ,  David Gessner ,  Bruce Herbes ,  Kevin Johnson ,  Sergey Moskalenko ,  Lorna Lockman ,  Doug Schmidt

发明人： Teresa Ainsworth ,  Yuriy Bro ,  Frederick Cash ,  Gary Dickinson ,  Scott Eggerth ,  Tom Erb ,  Jeffrey Ferguson ,  David Gessner ,  Bruce Herbes ,  Kevin Johnson ,  Sergey Moskalenko ,  Lorna Lockman ,  Doug Schmidt

IPC分类号： G01N23/04

CPC分类号： G01N23/06 ,  G01N33/02 ,  G01N2223/618

摘要： A contaminant detection machine (1) including a conveyor (3) which causes an object under inspection (79) to pass through a plane (48) of emitted x-ray radiation. The plane is generated by an x-ray tube (55) that emits a lateral beam, thereby permitting the distance (88) between the x-ray tube and the object under inspection to be reduced. A photo diode arch mounting assembly (104) is placed above the object under inspection and is mated to a collimator assembly (125) that also serves as the mounting bracket for the x-ray generation assembly (38), thereby preserving optical alignment between the photo diode detector array (28) and the emitted x-ray plane (48). The detector array (28) scans the object under inspection (79) so as to produce a continuous series of discrete lines, each line being analyzed by an image processing unit (116) to determine the presence or absence of a contaminant. The conveyor (3) passes over a pair of slider bed surfaces (155, 156) which are mounted in a hinged manner such that the leading edge (168) of one surface (156) is parallel to and spaced apart from the trailing edge (172) of the other surface (155), thereby creating a gap that is coplanar with the collimation slot (129) and the emitted x-ray plane (48). Each bed surface (155, 156) is rigidly constrained within open ended mounting brackets (159, 160, 161 and 162) yet can be removed by hand without the use of tools. Similarly, the conveyor (3) is supported by a roller assembly (182) that includes a tracking block (142) and pivot pin (143) which permits the roller assembly to be mounted to and removed from flip up mounts (151, 152) by hand and without the need of tools. Graphical user interfaces (249, 260, 261, 266, 275, 282 and 288) permit a user to operate the machine (1) by means of a liquid crystal display touch screen (20).

公开(公告)号：US5440275A

公开(公告)日：1995-08-08

申请号：US282957

申请日：1994-07-29

申请人： Tom Erb ,  Thomas Springer

发明人： Tom Erb ,  Thomas Springer

IPC分类号： G01S7/40 ,  G01S13/34 ,  H03B21/02 ,  H03B23/00 ,  H03L7/00 ,  H03L7/12 ,  H03L7/16 ,  H03L7/20

CPC分类号： G01S7/4021 ,  H03B23/00 ,  G01S13/34 ,  H03B21/02 ,  H03B2200/0092

摘要： A multi-marker microwave sweep linearization system comprising a voltage controlled microwave oscillator utilizing an adaptive sweep control circuit is presented. The oscillator control voltage is to be adjusted as necessary to maintain a constant spacing between markers. To produce the markers, the output of the oscillator is mixed with the output at a comb generator having harmonics. The lower side bands generated as the oscillator sweeps past the comb frequencies generates a series of `chirps`, centered about each of the comb harmonics. It will be noted, that the frequency of the chirp passes through zero when the oscillator frequency is exactly equal to one of the comb harmonics. The marker is to be associated with a higher frequency in the chirp envelope to avoid phase uncertainties. This can be accomplished with a frequency-detector circuit which may comprise a retriggerable monostable multi-vibrator having a time constant equal to the period of the frequency to be detected. The multi-vibrator is preceded by a high speed comparator which squares up the chirp signal. At the onset of the chirp, the signal amplitude is too low to be detected by the comparer. The comparer threshold is set with hysteresis to allow triggering when the chirp frequency is higher than the desired marker detection frequency. Further, by averaging several sweeps it is possible to get very precise marker position measurements. Any long term change in the oscillator frequency versus voltage characteristics which degrades sweep linearity will be manifested as a shift in the position of one of the markers, and the sweep voltage can be readily adjusted to compensate for it.

摘要翻译： 提出了一种包括利用自适应扫描控制电路的压控微波振荡器的多标记微波扫描线性化系统。 要调整振荡器控制电压，以保持标记之间的恒定间隔。 为了产生标记，振荡器的输出与具有谐波的梳状发生器的输出混合。 当振荡器扫过梳状频率时产生的低频带产生一系列以梳状谐波为中心的“啁啾”。 应当注意，当振荡器频率恰好等于梳状谐波之一时，啁啾的频率通过零。 该标记与啁啾信封中的较高频率相关联，以避免相位不确定。 这可以通过频率检测器电路来实现，频率检测器电路可以包括具有等于待检测频率的周期的时间常数的可再触发单稳态多谐振荡器。 多重振动器之前是高速比较器，其对齐线性调频信号。 在啁啾开始时，信号幅度太低，不能被比较器检测到。 比较器阈值设置为迟滞，以允许当啁啾频率高于期望的标记检测频率时触发。 此外，通过平均几次扫描，可以获得非常精确的标记位置测量。 降低扫描线性度的振荡器频率对电压特性的任何长期变化将表现为标记之一的位置的偏移，并且可以容易地调整扫描电压以补偿扫描电压。