发明名称 |
CONTROL OF SCAN OPERATION |
摘要 |
<p>An optical scanner in a retail store checkout stand includes a single item detector upstream of the scanner window. Output signals from the item detector and from symbol recognition logic are used to open and close a shutter in the beam path of the scanner laser. The shutter is opened and a first time out sequence is started when the beam path is interrupted. A second, short time out sequence is restarted each time a valid symbol is recognized. A third time out sequence of intermediate length supersedes the first time out sequence when the beam path is cleared. The laser shutter is closed and the symbol is transferred to a terminal or controller upon the completion of any active time out sequence or upon recognition of a predetermined number of identical symbols, whichever comes first.</p> |
申请公布号 |
JPS5892067(A) |
申请公布日期 |
1983.06.01 |
申请号 |
JP19820162416 |
申请日期 |
1982.09.20 |
申请人 |
INTERN BUSINESS MACHINES CORP |
发明人 |
REROI DEEBITSUDO DEITSUKUSON;CHIYAARUZU MAIKERU PIAASU;OOREN ERU SUTOOKUSU;NOOMASU JIYOSEFU UTSUDORANDO |
分类号 |
G06K7/016;G06K7/10 |
主分类号 |
G06K7/016 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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