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公开(公告)号：US4044847A
公开(公告)日：1977-08-30
申请号：US653850
申请日：1976-01-30
申请人： Bosco Wu
发明人： Bosco Wu
CPC分类号： G01G23/361 , Y10S177/06
摘要： A weighing scale includes an optoelectronic system having apparatus for generating a moire fringe pattern and for detecting the moving of the pattern in accordance with scale tare deflection. One of a pair of ruled parallel grating sets is fixed with respect to the scale frame while the other is mounted for movement with the tare and close to and in a plane parallel with the fixed set. When a beam of light is projected through both grating sets in a transmissive mode towards a photodetector array the grating interference modulates the light beam into parallel moire fringes. Upon placement of a load on the scale, deflection of the tare results in movement of successive fringes across the photodetectors resulting in the sequential generation of weight indicative signals. The photodetectors are arrayed on and secured to a movable carrier which is adjustably positionable so that the effective spacings between the photodetectors corresponds to the spacings and proper phase angle required between said fringes.
摘要翻译： 称重秤包括具有用于产生莫尔条纹图案的设备的光电系统，并且用于根据刻度皮重偏转来检测图案的移动。 一对规则的平行光栅组中的一个相对于刻度尺固定，而另一个被安装成用皮重移动并靠近固定组平行的平面。 当光束以透射模式朝向光电检测器阵列投影通过两个光栅组时，光栅干涉将光束调制成平行的莫尔条纹。 在秤上放置负载时，皮重的偏移导致连续边缘穿过光电探测器的移动，导致重量指示信号的顺序生成。 光电检测器被排列在并固定到可调节定位的可移动载体上，使得光电检测器之间的有效间隔对应于所述条纹之间所需的间隔和适当的相位角。
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公开(公告)号：US4097150A
公开(公告)日：1978-06-27
申请号：US708444
申请日：1976-07-23
申请人： Bosco Wu
发明人： Bosco Wu
CPC分类号： G01G23/16 , G01G23/361 , Y10S177/06
摘要： An optical detection system for a weighing scale includes an apparatus for generating a moire fringe. Unlike prior moire-type systems, however, the present scale is constructed with a substantially rigid tare, so that movement of the moire is limited to only a portion of one fringe line. Movement of the tare, and the pan carrying the load, are visually not apparent. Response time is greatly enhanced by the inventive system and accuracy is improved due to minimized hysteresis loss. The invention detects an optical shifting of the fringe line, rather than a counting of a number of fringe lines as with prior highly deflective scale systems.
摘要翻译： 用于称重秤的光学检测系统包括用于产生莫尔条纹的装置。 然而，与现有的莫尔型系统不同，本标尺由基本上刚性的皮重构成，使得莫尔条纹的运动仅限于一条边缘线的一部分。 皮重的运动和携带负载的盘在视觉上不明显。 本发明系统大大提高了响应时间，并且由于磁滞损失最小而提高了精度。 本发明检测条纹线的光学偏移，而不是像先前的高度偏转标度系统一样计数条纹线。
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