公开(公告)号：US3792235A

公开(公告)日：1974-02-12

申请号：US3792235D

申请日：1971-12-22

Applicant: SERVO CORP OF AMERICA

Inventor： DURANTE A ,  MACEY F

IPC: B61L25/04 ,  G06K7/10 ,  G06K7/00

CPC classification number: G06K7/10861 ,  B61L25/041

Abstract: Automatic coded object identification system for reading labels of the type having retroreflective stripes arranged in a vertical array over a wide depth of field to two or more ranges (specifically three in the embodiment described herein). For each vertical scan of the stripes of a lebel by a scanner a set of electrical signals are produced. Each vertical scan also causes one of three processing control signals to be produced in succession. The electrical signals are amplified, shaped, and analyzed to determine if they meet prescribed limits as to pulsewidth measurements for proper label-derived signals. The process control signals control the values of amplification, shaping, and pulse-width measurement limits so that during three successive scans three sets of signals from a label are processed in three different manners. Each of the three process control signals causes the apparatus to optimally process the signals for a label located within a corresponding one of the three ranges. Thus, if a label is within one of the three ranges, the signals produced during one of three scanning operations will be properly processed. When signals are properly processed and found to meet the prescribed limits of pulse-width and other timing criteria, they are stored in a shift register until all the signal data on the label is accumulated. The accumulated data is checked in accordance with pattern recognition and parity checking schemes and if determined to be proper label-derived data it is transmitted to read out apparatus.

Abstract translation: 自动编码对象识别系统，用于读取具有以宽的景深排列成垂直阵列的回射条带类型的标签到两个或多个范围（具体地说在本文所述的实施例中为三个）。 对于通过扫描仪的lebel条纹的每次垂直扫描，都产生一组电信号。 每个垂直扫描也会导致三个处理控制信号之一相继产生。 电信号被放大，成形和分析，以确定它们是否符合关于适当的标签衍生信号的脉冲宽度测量的规定限制。 过程控制信号控制放大，整形和脉冲宽度测量限值，以便在三次连续扫描期间，以三种不同的方式处理来自标签的三组信号。 三个过程控制信号中的每一个使得设备最佳地处理位于三个范围中相应的一个范围内的标签的信号。 因此，如果标签在三个范围之一内，则在三个扫描操作之一产生的信号将被适当地处理。 当信号被正确处理并发现满足规定的脉冲宽度和其他定时标准限值时，它们被存储在移位寄存器中，直到标签上的所有信号数据被累积为止。 根据模式识别和奇偶校验方案检查累积数据，并且如果确定为适当的标签导出数据，则将其发送到读出装置。