公开(公告)号：US08789759B2

公开(公告)日：2014-07-29

申请号：US13895616

申请日：2013-05-16

申请人： Metrologic Instruments, Inc.

发明人： Tao Xian ,  Ynjiun P. Wang ,  Yong Liu ,  Chen Feng

IPC分类号： G06K7/10

CPC分类号： G06K7/10564 ,  G06K7/10821 ,  G06K7/10851 ,  G06K7/1408 ,  G06K7/1413 ,  G06K2007/10524

摘要： A laser scanning code symbol reading system includes an analog scan data signal processor for producing digital data signals, wherein during each scanning cycle, a light collection and photo-detection module generates an analog scan data signal corresponding to a laser scanned code symbol, a multi-channel parallel scan data signal processor/digitizer processes the analog scan data signal along multiple cascaded multi-stage signal processing channels, to generate digital data signals corresponding thereto, while a synchronized digital gain control module automatically processes the digital data signals in response to start of scan (SOS) signals generated by a SOS detector. Each signal processing channel supports different stages of amplification and filtering using a different set of band-pass filtering and gain parameters in each channel, to produce multiple digital first derivative data signals, and/or multiple digital scan data intensity data signals, having different signal amplitudes and dynamic range characteristics for use in decode processing.

摘要翻译： 激光扫描码符号读取系统包括用于产生数字数据信号的模拟扫描数据信号处理器，其中在每个扫描周期期间，光采集和光检测模块产生对应于激光扫描代码符号的模拟扫描数据信号， 通道并行扫描数据信号处理器/数字化仪处理沿多个级联多级信号处理通道的模拟扫描数据信号，以产生与之相对应的数字数据信号，而同步的数字增益控制模块响应于起动而自动处理数字数据信号 由SOS检测器产生的扫描（SOS）信号。 每个信号处理通道支持不同的放大和滤波级，使用每个通道中不同的带通滤波和增益参数集合，以产生具有不同信号的多个数字一阶导数数据信号和/或多个数字扫描数据强度数据信号 幅度和动态范围特性用于解码处理。