公开(公告)号：US4424589A

公开(公告)日：1984-01-03

申请号：US139463

申请日：1980-04-11

申请人： E. Raymond Thomas ,  Lysle D. Cahill ,  William W. Marshall ,  Luke L. Talley ,  John A. Lawson ,  Brian N. Wilcox

发明人： E. Raymond Thomas ,  Lysle D. Cahill ,  William W. Marshall ,  Luke L. Talley ,  John A. Lawson ,  Brian N. Wilcox

IPC分类号： G02B13/00 ,  G02B26/10 ,  G02B27/00 ,  G03F3/08 ,  H04N1/053 ,  H04N1/113 ,  H04N1/401 ,  G06K9/20 ,  H04N1/10

CPC分类号： H04N1/113 ,  G02B26/10 ,  G02B27/0031 ,  H04N1/053 ,  H04N1/401 ,  H04N2201/0471 ,  H04N2201/04775

摘要： A flat bed scanner system for optically sensing a transparent original image and producing three channels of binary digital data representing the densities of the original image. Each channel produces data in response to one sensing color and sensing of the original image occurs by directing a focused image of a beam of white light onto and across the original image in a pattern of parallel scan lines there being a plurality of sensing positions along each scan line, and producing the digital output data in response to the modulated beam of light transmitted by the original image. There is an optical system which provides for the directing of the beam of white light across the original image and which directs the modulated beam onto sensors. The optical system includes color correction and field flattening of the beam of white light and provides a cylinder condenser lens for the modulated beam of white light. An electronic system receives signals from the sensors and converts them into the desired digital data through analog to digital and logarithmic conversion circuits, base line correction circuits and references compensation circuits. The electronic system also provides a sample clock signal synchronizing the locations of the sensing beam with the locations of the sample positions by way of an optical grating system. An electromechanical system is provided to maintain the optical system in focus from scan line to scan line on both the original image and the optical grating system.

摘要翻译： 一种用于光学感测透明原始图像并产生表示原始图像的密度的三通道二进制数字数据的平板扫描器系统。 每个通道响应于一个感测颜色产生数据，并且通过以平行扫描线的图案将白光束的聚焦图像引导到原始图像上并跨越原始图像而发生原始图像的感测，其中沿着每个扫描线具有多个感测位置 扫描线，并且响应于由原始图像传输的调制光束产生数字输出数据。 存在一种光学系统，其提供将白光束定向穿过原始图像并将调制光束引导到传感器上。 光学系统包括白光束的颜色校正和场平坦化，并为调制的白光束提供气缸聚光透镜。 电子系统从传感器接收信号，并通过模数转换电路，基线校正电路和基准补偿电路将它们转换成所需的数字数据。 电子系统还提供采样时钟信号，通过光栅系统将感测光束的位置与采样位置的位置同步。 提供了一种机电系统，用于将原始图像和光栅系统上的光学系统保持在扫描线到扫描线的对焦状态。

公开(公告)号：US4817176A

公开(公告)日：1989-03-28

申请号：US829702

申请日：1986-02-14

申请人： William W. Marshall ,  William F. McWhortor

发明人： William W. Marshall ,  William F. McWhortor

IPC分类号： G06K9/52 ,  G06K9/36

CPC分类号： G06K9/522 ,  G06K2209/01

摘要： A method and apparatus for recognizing an unknown character, pattern, or indicia, or the like as being a particular one of a group of known reference characters, patterns, indicia, or the like. In the preferred embodiment, the system converts scanned and digitized MICR data and uses it to identify the character. The reference characters and the unknown character are Fourier Transformed and various corrections are made for eliminating the absolute amplitude difference from the recognition process, while simultaneously providing a method of correcting for position differences between the reference charcter and the unknown character. Provisions are made for weighting the phase differences proportional to the expected accuracy of the phase data to minimize the effects of noise on the measurement, and for combining the amplitude and phase data to define a single "best match" criteria for the unknown character. The input data is stored in memory and later converted to real and imaginary frequency components through the Fourier Transform process. The real and imaginary parts are converted to amplitude and phase as a function of frequency and both the amplitude and the phase data are corrected for position errors and the like. They are then compared to a set of amplitude and phase data for the group of standard known characters. The particular one of the known reference characters which is closest to the transform of the unknown character is designated as the "best match". The second minimum is located, and the percentage that the best match is better than the second best match is used to determine a margin of error criteria.

摘要翻译： 用于将未知字符，图案或标记等识别为已知参考字符，图案，标记等的一组中的特定的方法和装置。 在优选实施例中，系统转换扫描和数字化的MICR数据并使用它来识别字符。 参考字符和未知字符是傅里叶变换的，并且进行各种校正以消除与识别处理的绝对幅度差异，同时提供校正参考字符与未知字符之间的位置差异的方法。 规定了对与相位数据的预期精度成比例的相位差进行加权，以最小化噪声对测量的影响，以及组合幅度和相位数据以定义未知字符的单个“最佳匹配”标准。 输入数据存储在存储器中，随后通过傅立叶变换处理转换为实频和虚数分量。 实部和虚部被转换为幅度和相位作为频率的函数，并且针对位置误差等校正振幅和相位数据。 然后将它们与一组标准已知字符的一组幅度和相位数据进行比较。 最接近未知字符的变换的已知参考字符中的特定一个被指定为“最佳匹配”。 位于第二个最小值，最佳匹配比第二个最佳匹配的百分比用于确定错误标准的边际。

公开(公告)号：US4841404A

公开(公告)日：1989-06-20

申请号：US106048

申请日：1987-10-07

申请人： William W. Marshall ,  Lamar D. Springer

发明人： William W. Marshall ,  Lamar D. Springer

IPC分类号： H02H1/04 ,  H02H3/12 ,  H02H3/38 ,  H02H7/08

CPC分类号： H02H7/0827 ,  F04D15/0236 ,  H02H1/04 ,  H02H3/12 ,  H02H3/382

摘要： An electrical circuit for providing electrical energy to an electric motor which operates a liquid pump. The motor and the pump are adapted to be submerged in the liquid which is pumped by the pump. The circuit disclosed herein senses the phase angle between the current and the voltage applied to the electric motor. When the phase angle indicates that the motor is operating without a load, the circuit deenergizes the electric motor. Thus, the motor and the liquid pump are protected against damage. Recognizing that harmonics may exist in the current flow through the motor, the circuit provides for obtaining a filtered signal proportional to the fundamental frequency of the current flowing through the motor. Thus, an accurate measurement of the loading of a motor is obtained. The circuitry of this invention also provides an accurate method of compensation for applied line voltage variations, so that a change in the applied line voltage does not produce a false indication that the motor loading has changed.

摘要翻译： 一种用于向操作液体泵的电动机提供电能的电路。 电动机和泵适于浸入由泵泵送的液体中。 这里公开的电路检测施加到电动机的电流和电压之间的相位角。 当相位角表示电机在没有负载的情况下工作时，电路会使电动机断电。 因此，电动机和液体泵被保护以免损坏。 认识到通过电动机的电流可能存在谐波，电路提供获得与流过电动机的电流的基频成比例的滤波信号。 因此，可以精确地测量电动机的负载。 本发明的电路还提供了对施加的线路电压变化的补偿的精确方法，使得所施加的线路电压的改变不会产生电动机负载已经改变的错误指示。