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1. 发明授权

US6134974A Incremental filament tension measurement device and method 失效
标题翻译：增量丝张力测量装置及方法
公开(公告)号：US6134974A
公开(公告)日：2000-10-24
申请号：US103073
申请日：1998-06-23
申请人： David N. Grover
发明人： David N. Grover
IPC分类号： G01L5/10 , G01L1/04
CPC分类号： G01L5/107 , G01L5/10
摘要： The tension in a filament is measured by deflecting the filament between two outer contact elements by a centrally-located deflecting contact element. A computer receives signals related to the displacement of the contact members, the force on the deflecting contact member and a plurality of relative displacement intervals of the contact elements. The computer determines a plurality of incremental force values related to the force on the deflecting contact element at each of the displacement intervals and calculates the tension in the filament based on the selected incremental force values. Force on the deflecting is measured by obtaining a force signal created by force on the deflecting contact element, establishing two different set values which are related to but not the same as the force signal, comparing the two set values with the force signal, amplifying the difference between each of the two set values and the force signal by a predetermined gain factor to create two final values within a predetermined range of values, and calculating the force on the deflecting contact element by a mathematical operation which uses the two set values, the final values, and the gain factor.
摘要翻译：灯丝中的张力是通过中心定位的偏转接触元件使两个外部接触元件之间的灯丝偏转来测量的。计算机接收与接触构件的位移有关的信号，偏转接触构件上的力和接触元件的多个相对位移间隔。计算机在每个位移间隔处确定与偏转接触元件上的力相关的多个增量力值，并基于所选择的增量力值计算丝中的张力。通过获得由偏转接触元件上的力产生的力信号来测量偏转上的力，建立与力信号相关而不是相同的两个不同的设定值，将两个设定值与力信号进行比较，两个设定值中的每一个和力信号之间的差值以预定的增益因子在预定值范围内产生两个最终值，并且通过使用两个设定值的数学运算来计算偏转接触元件上的力，最终值和增益因子。

2. 发明授权

US5274397A Large-format plotter using segmented raster-scanning 失效
标题翻译：大幅面绘图仪使用分段光栅扫描
公开(公告)号：US5274397A
公开(公告)日：1993-12-28
申请号：US699887
申请日：1991-05-14
申请人： David N. Grover
发明人： David N. Grover
IPC分类号： G01D9/38 , G01D15/14 , G03G15/32 , G06K15/12 , H04N1/04 , B11J2/47 , G01D15/16
CPC分类号： H04N1/04 , G01D15/14 , G01D9/38 , G03G15/32 , G06K15/12 , G03G2215/00974
摘要： A large-format plotting device is provided for transferring an image to a relatively large sized medium. A data processing device is used to divide the surface of the medium into a plurality of relatively narrow segments. A beam sweeping device, which can include a high energy beam such as a laser beam, is provided for sweeping the beam the width of the segment. The data processing device causes the beam to turn on and off to define a portion of the desired image. A movement mechanism is included to either move the beam generating device or the support for the medium at a desired velocity so that each sweep of the beam will produce a raster line whereby the entire segment will be swept forming a plurality of parallel raster lines covering the entire segment. The movement mechanism also includes placement mechanism for laterally moving the medium support or beam generating device to the next adjacent segment in sequence until the surface of the entire medium has been imaged. Alignment features can be provided so that the corresponding raster lines in each segment can be aligned so that they coincide and so that the beam will not overlap at the contiguous edges of the segments. Sensors can be provided on the beam generating device or on the medium to identify the edges of the desired segments. The medium can also be mounted on a rotating drum whereby the movement mechanism rotates the drum at a desired velocity synchronized with the sweep of the beam generating device. Raster-scan imaging is controlled by the data processing device which simultaneously controls the beam generating device for the sweep and intensity of the beam as well as the operation of the positioning mechanism.
摘要翻译：提供了一种大幅面绘图装置，用于将图像传送到较大尺寸的介质。使用数据处理装置将介质的表面划分成多个相对较窄的段。提供了可以包括诸如激光束的高能量束的束扫描装置，用于将束的宽度扫描。数据处理装置使光束打开和关闭以限定所需图像的一部分。包括移动机构以以期望的速度移动光束产生装置或介质的支撑件，使得光束的每次扫描将产生光栅线，由此整个片段将被扫掠形成多个平行的光栅线，其覆盖整个细分。运动机构还包括用于将介质支撑件或束产生装置依次横向移动到下一相邻段的放置机构，直到整个介质的表面已被成像。可以提供对准特征，使得每个段中的对应的光栅线可以对准，使得它们重合并且使得光束在段的相邻边缘处不会重叠。可以在光束产生装置或介质上提供传感器以识别期望的片段的边缘。介质也可以安装在旋转的滚筒上，由此移动机构以与波束产生装置的扫掠同步的所需速度旋转滚筒。光栅扫描成像由同时控制光束产生装置的扫描和光束强度以及定位机构的操作的数据处理装置控制。

3. 发明授权

US4603431A Method and apparatus for vectorizing documents and symbol recognition 失效
标题翻译：用于矢量化文档和符号识别的方法和装置
公开(公告)号：US4603431A
公开(公告)日：1986-07-29
申请号：US475037
申请日：1983-03-14
申请人： David N. Grover , Eugene A. Kleca , Curtis A. Lipkie
发明人： David N. Grover , Eugene A. Kleca , Curtis A. Lipkie
IPC分类号： G06K9/46 , G06K9/36 , G06K9/80 , G06T3/00 , G06T9/20 , H04N1/411 , H04N1/417 , G06K9/50
CPC分类号： H04N1/417 , G06K9/80 , H04N1/4115
摘要： An apparatus codes a scanned document locally representing each graphic element within a prescribed measure of accuracy by a trapezoidal approximation. The invention also includes a method for similarly coding a scanned document. The apparatus determines whether each scanned run is indicative of a Y- or .lambda.-junction, the termination of an old, or the commencement of a new graphic element, and whether a new linear approximation is necessary. The invention in a preferred embodiment recognizes symbols by determining the center of mass and maximum extremity of a symbol candidate, and comparing it to a reference library after normalizing with respect to scale, orientation and center of mass. In a preferred embodiment, an adaptive threshold parameter governs coding so as to reject noise and optimize a pair of linear predicters in a small number of scans. In a further preferred embodiment the accuracy of the linear predicters is refined so that the error is exponentially bounded.
摘要翻译：设备通过梯形近似，在规定的精度测量范围内对扫描的文件在本地表示每个图形元素进行编码。本发明还包括用于对扫描文档进行类似编码的方法。该装置确定每个扫描的运行是否指示Y或λ连接，旧的终止或新的图形元素的开始，以及是否需要新的线性近似。在优选实施例中的本发明通过确定符号候选的质心和最大极限来识别符号，并且在相对于标度，取向和质心标准化之后将其与参考文库进行比较。在优选实施例中，自适应阈值参数控制编码以便拒绝噪声并且在少量扫描中优化一对线性预测器。在另一个优选实施例中，线性预测器的精度被改进，使得误差是指数方式的。

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