CN102842023A - 混合型双光学激光扫描和成像系统 - Google Patents

混合型双光学激光扫描和成像系统 Download PDF

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CN102842023A
CN102842023A CN2012101462634A CN201210146263A CN102842023A CN 102842023 A CN102842023 A CN 102842023A CN 2012101462634 A CN2012101462634 A CN 2012101462634A CN 201210146263 A CN201210146263 A CN 201210146263A CN 102842023 A CN102842023 A CN 102842023A
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S·P·基尔尼
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Abstract

一种混合型双光学条形码符号读取系统，其具有竖直外壳部和水平外壳部，所述竖直外壳部具有竖直扫描窗口，所述水平外壳部具有水平扫描窗口，激光扫描平面从其投射并且在由该竖直和水平扫描窗口之间限定的3D扫描体积内相交。数字成像模块被支持在该系统外壳的竖直部内，并且当在非常靠近该系统的竖直扫描窗口的地方检测到对象时在该3D扫描体积内自动投射视场(FOV)，这在非常靠近该竖直扫描窗口的地方提供了自动触发的数字成像区域。

Description

混合型双光学激光扫描和成像系统
技术领域
本公开内容大体涉及以增加灵活性和POS吞吐量的方式在销售点(POS)环境中读取条形码符号的改进。
背景技术
使用用于产品和物品标识的条形码符号在本领域是公知的。目前，已经开发出用于在零售销售点(POS)读取条形码符号的各种类型的条形码符号扫描仪。
在诸如超市和高容量的百货商店之类的苛求的零售环境中，其中高的结账吞吐量对于达到商店利益率和客户满意是关键的，通常使用具有底部和侧面扫描窗口这二者的激光扫描条形码读取系统来使得能够实现极其迅速的扫描性能。在这样的系统中，出纳员仅需要拖动条形编码的产品经过这些扫描窗口，以便在出纳员或结账人员的最小程度的协助下自动地读取其上的条形码。由于这样的系统采用设置在其底部和侧面扫描窗口后面的两组光学器件，所以这样的双扫描窗口系统典型地被称为“双光学”激光扫描系统。在美国专利号：4229588；4652732和6814292中公开了基于多面体的双光学激光扫描系统的示例；这些美国专利中的每一个通过引用全部结合于此。双光学激光扫描仪的商业示例包括：PSC8500-PSC公司的基于6面激光的扫描；PSC8100/8200，PSC公司的基于5面激光的扫描；NCR7876-NCR的基于6面激光的扫描；NCR7872，NCR的基于5面激光的扫描；以及Metrologic Instruments公司的MS232x
Figure BSA00000716487400011
H和MS2122
Figure BSA00000716487400012
E Stratos基于6面激光的扫描系统，和Metrologic Instruments公司的MS2200
Figure BSA00000716487400013
S基于5面激光的扫描系统。
随着2D条形码符号体系在零售商店环境中越来越多的出现(例如，读取驾驶员的驾照以用于信用核准，年龄证明等)，存在对在销售点(POS)站支持基于数字成像的条形码读取的增长的需要。
转让给Metrologic Instruments公司的US专利第7540424B2号和US公开第2008/0283611A1号描述了高性能的基于数字成像的POS条形码符号读取器，其采用平面照明和数字线性成像技术，以及区域照明及成像技术。
US专利号7137555、7191947、7246747、7527203和6974083公开了混合激光扫描和数字成像系统，在其中数字成像器被集成在基于POS的激光扫描条形码符号读取系统内。在这样的系统设计中，数字成像器帮助操作者读取差质量的码，并且也使得该混合系统能够读取2D符号体系。在POS处数字成像的使用能够实质上捕获条形码符号的每个维度和视角，并且能够在如何处理该符号体系上做出更有学识的决策。
然而，当使用数字成像时，在POS处的吞吐速度典型地比使用双光学激光扫描系统慢得多，这是由于预期帧率和图像处理时间。而且，在数字成像的情况下，经常产生运动容限的问题，生成模糊且有时难以读取的数字图像。
然而，尽管这些年来基于激光扫描和数字成像的条形码符号读取器这二者的很多改进，但是在本领域仍然存在对改进的混合型条形码符号读取系统的巨大需要，该系统在苛求的POS扫描环境中能够进行高性能且鲁棒的操作，同时避免了现有技术系统和方法的缺点和缺陷。
发明内容
相应地，本公开内容的主要目的是提供一种改进的混合型双光学条形码符号读取系统以供在POS环境中使用，其摆脱了现有技术系统和方法的缺点和缺陷。
另一目的是提供一种混合型双光学条形码符号读取系统，其具有竖直外壳部和水平外壳部，所述竖直外壳部具有竖直扫描窗口，所述水平外壳部具有水平扫描窗口，各激光扫描平面从其投射并且在由该竖直和水平扫描窗口之间限定的3D扫描体积内相交，以及其中数字成像模块被支持在该系统外壳的竖直部内，并且当在非常靠近该系统的竖直扫描窗口的地方检测到对象时在该3D扫描体积内自动投射视场(FOV)，这在非常靠近该竖直扫描窗口的地方提供了自动触发的数字成像区域。
另一目的是提供一种混合型双光学条形码符号读取系统，其中，当在该数字成像模块被接纳在其对接端口中时，其视场(FOV)有效地聚焦在该系统的竖直扫描窗口稍前，因此当操作者使得承载条形码的对象接近该竖直扫描窗口时，自动检测条形码符号或支持对象，并且该数字成像模块被触发以迅速地捕获和处理条形码的一个或多个数字图像以致力于快速地解码该条形码并生成表示其的符号字符数据。
另一目的是提供一种混合型双光学条形码符号读取系统，其中，当数字成像模块从其对接端口移出并且握在操作者的手中时，其视场(FOV)沿着该系统的工作范围聚焦以在其移动成像操作模式期间读取沿着其视场的任何地方的条形码。
另一目的是提供一种混合型双光学条形码符号读取系统，其中对接口被提供在该系统的或者该竖直外壳部中，用于可移除地接口连接该系统内的数字成像模块，并支持该系统的竖直和水平扫描窗口之间的基于数字成像的功能。
另一目的是提供这样的混合型双光学条形码符号读取系统，其中该数字成像模块在结账操作期间可以由操作者移出并握在操作者的手中，并且被用来读取在POS台处正购买的产品上的1D和2D条形码符号。
另一目的是提供一种混合型双光学条形码符号读取系统，其中当对接在其对接口内时，该数字成像模块与该系统外壳内所支持的一组视场(FOV)折叠式反射镜合作，用于向外投射视场到该系统所支持的3D扫描体积中。
另一目的是提供这样的混合型双光学条形码符号读取系统，其中在竖直外壳部内支持的一个或多个激光模式折叠式反射镜被用来折叠该数字成像模块的FOV并且把其投射到3D扫描体积中。
另一目的是提供这样的混合型双光学条形码符号读取系统，其中该对接口包括数据/功率/控制接口，用于在该数字成像模块对接在该对接口内时，接口连接数据通信、充电和控制操作。
另一目的是提供一种混合型双光学条形码符号读取系统，其帮助在工人生产率和结账速度及吞吐量方面提供改进。
在下文中以及附于此的权利要求书中这些以及其他目的将变得显而易见。
附图说明
为了更完全地理解这些目的，应当结合伴随的图形绘图阅读对说明性实施例的下列详细描述，其中：
图1A是混合型双光学条形码符号读取系统的说明性实施例的第一透视图，该混合型双光学条形码符号读取系统用于安装和使用在零售环境中的销售点(POS)结账站，并且能够支持若干不同的操作模式，包括混合激光扫描和数字成像操作模式、仅激光扫描操作模式和移动成像操作模式；
图1B是图1A的混合型双光学条形码符号读取系统的第二透视图，示出了数字成像模块插入或移出其集成在该系统外壳的竖直部内的对接端口；
图1C是图1A的混合型双光学条形码符号读取系统的横截面侧视图，示出了正被聚焦光学元件改变的数字成像模块的FOV，然后被安装在该系统外壳的竖直部内的折叠式反射镜折叠，以及一产品，在操作者接近地朝着该竖直扫描窗口读取码符号自然地呈现困难时，该产品正被从该数字成像体积投射通过该竖直扫描窗口的对象检测场自动地检测；
图1D是来自图1B中示出的其对接口的数字成像模块的透视图，并且示出为正在其移动(可手持)成像操作模式下操作，其中当在该数字成像模块的视场(FOV)内自动检测到对象(例如条形编码的产品)时，自动生成其光目标射束；
图2是图1A至1D的混合扫描/成像码符号读取系统的示意框表示，其中(i)一对激光扫描站沿着经过该系统的3D扫描体积的扫描平面丛支持对条形码符号的自动激光扫描，和(ii)在该系统外壳内所支持的数字成像模块，其支持呈递给该系统的竖直扫描窗口的条形码符号的基于成像的读取；
图3是支持在图1A至1C的混合扫描/成像码符号读取系统内的数字成像模块的示意框表示；
图4是阐述把图1A至3的混合扫描/成像码符号读取系统配置为图1A和1C所支持示出的其混合扫描/成像操作模式的方法的主要步骤的流程图；和
图5A和5B共同阐述了描述在该说明性实施例的混合扫描/成像代码符号读取系统中，在其混合扫描/成像操作模式过程中，由系统控制者支持的控制过程的流程图。
具体实施方式
参考附图中的图，将非常详细地描述该设备和方法的各种说明性实施例，其中将使用同样的附图标记来指示同样的元件。
图1A至1D示出了本公开内容的基于混合激光扫描/数字成像(即扫描/成像)的条形码符号读取系统1的说明性实施例，其支持三种不同的操作模式，即：(仅)激光扫描操作模式，在图1B中示出；移动/便携式数字成像操作模式，在图1D示出；和混合扫描/成像操作模式，在图1A和1C中示出。下面，现在将以很多技术细节来描述本公开内容的混合扫描/成像系统1及其各种操作模式。
如图1A、1B和1C中所示，该说明性实施例的混合扫描/成像码符号读取系统包括具有竖直外壳部2A和水平外壳部2B的系统外壳2，该竖直外壳部2A具有竖直的光学透明(玻璃)扫描窗口3A，该水平外壳部2B具有水平的光学透明(玻璃)扫描窗口3B。如所示出的，水平部2A和竖直部2B被布置成相对于彼此处于正交关系，因此该水平和竖直扫描窗口基本上是垂直的。第一激光扫描站15A和第二激光扫描站15B安装在该系统外壳内，并且提供激光扫描子系统15，其用于生成激光扫描平面丛组并且把它们投射通过激光扫描窗口3A和3B，在激光扫描窗口3A和3B这些激光扫描平面相交并且在该竖直扫描窗口3A和水平扫描窗口3B之间限定的3D扫描体积98内产生全方向的激光扫描图案，如图1和1C中所示。关于激光扫描站或平台15A和15B的细节可以在通过引用结合于此的US专利第7422156号中找到，如同在此完全阐述一样。
如图1C中所示，基于IR的临近检测器67安装在该外壳的前部分中，用于在系统操作期间在该3D扫描体积前面自动检测人操作者的存在。基于IR的临近检测器67的功能是唤醒该系统(即唤醒模式(WAKE UPMODE))，并且设置睡眠(SLEEP)计时器(T1)，其在把该系统自动归纳为其睡眠模式(SLEEP MODE)之前对该系统必须读取条形码符号多长时间(例如15分钟)进行计数，其中多面体扫描元件和激光二极管被去激活以节约该系统内的电。优选地，基于IR的临近(即唤醒)检测器67使用下列来实现：(i)用于生成高频振幅调制的IR射束的IR光(photo)-发射器，和(ii)用于使用本领域公知的同步检测电路来接收振幅调制的IR射束的反射的IR光-接收器。在图1A中，所发射和接收的振幅调制的IR射束由附图标记70A指示。
如图1B中所示，对接口288形成在系统外壳的上外壳部中，并且具有与滑动到该对接口288中的可手持数字成像模块200的几何形状紧密匹配的几何形状。如所示出的，该数字成像模块200在其可手持外壳的下部分上具有数据/功率/控制接口294。如图2中所示，该数据/功率/控制接口294适配为接合并建立与安装在该对接口288的内部的匹配的数据/功率/控制接口285的电气连接。
如图1C中所示，对接口288安装在该外壳的竖直部内，并且包括光学元件210，其修改该便携式数字成像模块200的视场(FOV1)的光学特性，其经过FOV折叠式反射镜274至275被折叠若干次，以提供经修改的视场(FOV2)，该经修改的视场(FOV2)延伸通过竖直扫描窗口3A，到该3D扫描体积中，如所示出的。虽然并非要求，但是这些FOV折叠式反射镜中的一个或多个可以由提供在该系统外壳的竖直外壳部中的激光扫描模式折叠式反射镜来提供。优选地，所得到的视场(FOV2)将延伸若干英寸至3D扫描体积中(例如6英寸或更少)，具有在竖直扫描窗口3A之前几英寸(例如2-3英寸)的焦点深度。在该说明性实施例中，当该数字成像模块被安装在对接口中时该数字成像模块的FOV2将完全填充竖直扫描窗口3A的活动区域。虽然该数字成像模块关于该竖直扫描窗口以及在该竖直扫描窗口前面将具有小的焦点深度，但是主要设计目标是在该窗口表面获得绝对最高的图像分辨率。当条形码符号的最小元素分辨率等于或小于2.0密耳时，实现了此光学系统设计的益处。
如图1C中所示，当数字成像模块200被对接到其对接口288中时，该数字成像模块在其移动成像模式下所支持的可见目标射束270可以被抑制(即，通过在该对接口内提供的数据/功率/控制接口电路被禁止。同时，数字成像模块200内的自动对象检测子系统220将被启用，因此该数字成像模块自动生成其基于IR的检测射束232并且将基于IR的检测射束232投射离开FOV折叠式反射镜以及到竖直扫描窗口3A之外，准备自动检测正呈递给该竖直扫描窗口的对象，并且因此激活该数字成像模块200以捕获和处理所呈递产品的数字图像，以及所呈递产品的表面上所支持的任何条形码符号。
如图1C中所示，在混合扫描/成像操作模式期间，该数字成像模块的FOV在空间上覆盖该系统的3D扫描体积的一部分。然而，在替换实施例中，该数字成像FOV不需要在空间上覆盖该3D扫描体积，而简单地填充该竖直扫描窗口和3D扫描体积的边缘部分之间的空间区域。这样，当操作者朝着竖直扫描窗口呈递条形编码的产品通过3D扫描体积时，将确保了“确保拍摄(sure-shot)”条形码读取操作，即使当读取最难以读取的条形码符号时也是如此。
如图1D中所示，可手持数字成像模块200从该系统外壳中的其对接口288移出，并且被示出为在移动成像操作模式下被使用。典型地，此操作模式(在该模式下数字成像模块200被握在操作者的手中)被用于读取在难以读取的条形码标签或产品上的条形码符号，或者当对于在POS站使用手持式数字读取条形码符号而言以其他方式是方便的时。如所示出的，在此模式期间，手持式数字成像模块200在其自动触发模式下操作，其中在使用其IR对象检测子系统220自动检测到对象时，其对象目标子系统231自动生成与要读取的条形码符号对准的可见目标射束270。然后当操作者压下手动触发开关205时，所检测对象的一个或多个的数字图像被捕获并处理以致力于读取该对象上的目标码符号。如果并且当读取到条形码符号时(即解码)，则自动生成符号字符数据并经由移动数字成像模块和该混合扫描/成像系统中支持的无线蓝牙通信接口把该符号字符数据传送给主机计算机9。
如图2的系统图中所示，混合扫描/成像系统1通常包括：激光扫描站15A和15B，用于生成激光扫描平面组并把它们投射分别通过竖直扫描窗口3A和水平扫描窗口3B，以及根据3D扫描体积中的扫描对象生成扫描数据流；扫描数据处理子系统20，用于支持使用从站15A和15B生成的扫描数据流的基于自动扫描数据处理的条形码符号读取；输入/输出子系统25，用于与图像处理子系统20、电子称量台22、RFID读取器26、信用卡读取器27、电子物品监控(Electronic Article Surveillance，EAS)子系统28(包括集成在系统中的EAS标签去激活块29、和可听/可视信息显示子系统(即模块)300接口连接；包括RF收发器和天线103A的
Figure BSA00000716487400082
RF 2路通信接口135，用于连接到启用
Figure BSA00000716487400083
的手持式扫描器、成像器、PDA、便携式计算机136等等，以用于控制、管理、应用和诊断的目的；图3中指定的移动数字成像模块200，并且其具有提供在可手持模块外壳的外部的数据/功率/控制接口294，并且当数字成像模块200如图1C所示对接在其对接口288中时与数据/功率/控制接口285接口连接并且建立与其的电气互连；控制子系统37，用于控制(即组织和管理)激光扫描站(即子系统)的操作，控制当对接在对接口288中时该数字成像模块200的功能，控制在该系统中支持的其他子系统；基于IR的唤醒检测器67，其在工作中连接到控制子系统37，用于响应于在该系统外壳附近(例如1-2英尺)自动检测到操作者而生成第一触发信号并把其提供给系统控制器。
在说明性实施例中，每个激光扫描站15A、15B由旋转多面体、激光二极管源、光收集光学器件、光电二极管和如在US专利第7422156号(通过引用结合于此)中公开的那样布置的其他光学器件部件构造。
在图2中，可以使用包括本领域公知的基于拼接的条形码符号解码技术在内的常规条形码读取技术来实现沿着扫描数据处理子系统20的每个通道采用的条形码符号读取模块。
如图3中所示，把在该混合扫描/成像系统1的说明性实施例中采用的数字成像模块或子系统200实现为完全独立的可手持数字成像器，包括多个部件，即：图像形成和检测(即，照相机)子系统221，其具有用于在要成像的对象上产生视场(FOV)的图像形成(照相机)光学器件234和CMOS或类似区域型图像检测阵列235，该图像检测阵列235用于检测在至少启用了该图像检测阵列上的多行像素的图像捕获模式下在照明操作期间从该对象反射离开的成像光；采用LED照明阵列232的基于LED的照明子系统222，用于在图像形成和检测子系统221的整个FOV233内产生窄带宽区域照明场226，其从被照明对象反射并且透射通过实现在该可手持内的窄带透射型光学滤波器540且被图像检测阵列35检测，而环境光的所有其他分量基本上都被抑制；对象目标照明子系统531，用于把窄区域目标照明射束570生成到该FOV中以帮助允许用户在成像发生的该FOV的活动(active)部分内对准条形码符号；基于IR的对象检测子系统520，用于在FOV1(或FOV2)内产生基于IR的对象检测场232，并且在图1D中示出的移动数字成像操作模式期间自动生成第二触发信号并把其供应给系统控制器控制子系统270，以及当混合双光学系统1正操作在如图1A和1C中所示的混合扫描/成像操作模式下时还供应给该系统外壳内的系统控制器37；自动曝光测量和照明控制子系统224，用于控制基于LED的照明子系统222的操作；图像捕获和缓冲子系统225，用于捕获和缓冲由图像形成和检测子系统221检测的2D图像；数字图像处理子系统226，用于处理由图像捕获和缓冲子系统225捕获和缓冲的2D数字图像，以及读取在其中表示的1D和/或2D条形码符号；输入/输出子系统527，用于把经处理的图像数据等输出到外部主机系统或其他信息接收或响应装置；系统存储器229，用于存储实现系统配置参数(SCP)的配置表229A的数据；数据/功率/控制接口294，其包括数据通信接口295、控制接口296、和在工作中连接到板上电池功率供应和功率分配电路293的电功率接口297；蓝牙通信接口，其与I/O子系统227接口连接；与上面的各子系统集成的系统控制子系统230，用于在系统操作期间控制和/或协调这些子系统。
对象目标子系统231的主要功能是响应于下列各项而自动生成可见线性目标照明射束并且跨该系统的FOV的中央范围来投射该可见线性目标照明射束：(i)在手持式成像系统操作模式期间自动检测到对象或(ii)由操作者在她/他手动激励可手动激励的触发开关205时手动检测到对象。为实现对象目标子系统231，可以把一对可见LED布置在FOV光学器件234的相对位置上，以便生成线性可见目标射束270，其被投射离开FOV折叠式并且到成像窗口203之外，如在US公开第US20080314985A1号(其全部通过引用结合于此)中详细地描述和示出的。
对象检测子系统220的主要功能是在图像形成和检测子系统221的FOV 233内自动产生对象检测场232，以检测对象在该对象检测场232的预定区域内的存在，并生成供应给该系统控制子系统230以用于当在该系统的对象检测场内检测到对象时进行指示的控制信号。对象运动检测子系统220使用IR LED和IR光电二极管来实现以便自动检测该系统的FOV中对象的存在。
图像形成和检测子系统221包括图像形成(照相机)光学器件234，用于在要成像的对象上提供视场(FOV)233；和CMOS区域型图像检测阵列235，用于在照明和图像获取/捕获操作期间检测从该对象反射离开的成像光。
基于LED的照明子系统222的主要功能是当在该FOV内自动检测到对象时从LED阵列223产生宽区域照明场36。特别地，该照明场具有窄光学带宽，并且分别在照明模式和成像模式期间在空间上被限制在图像形成和检测子系统521的FOV内。此布置被设计成确保仅从照明子系统222传送且从被照明对象反射的窄带照明，最终透射通过该系统内的窄带透射型光学滤波器子系统240并且到达CMOS区域型图像检测阵列235以用于检测和处理，而由光收集光学器件收集的环境光的所有其他分量在图像检测阵列535处基本上都被抑制，由此提供了改进的SNR，因此改进了该系统的性能。
窄带透射型光学滤波器子系统240由下列各项来实现：(1)包括在成像窗口203内的高通(即，红色波长反射)滤波器元件，和(2)安装在CMOS区域型图像检测阵列235之前或者超过该高通滤波器元件之后任何地方的低通滤波器元件，包括正被实现为在该模块中采用的至少一个FOV折叠式反射镜上支持的二向色镜。
自动曝光测量和照明控制子系统224执行两个主要功能：(1)实时测量由该系统的光学器件在大约其图像检测阵列235处收集的光子能量的功率密度(焦耳/厘米)，并且生成指示用于良好图像形成和检测所需的曝光量的自动曝光控制信号；和(2)结合由系统控制子系统230提供的照明阵列选择控制信号，以自动驱动和控制照明子系统222中的LED阵列223的输出功率，使得该系统的FOV内的对象被最佳地暴露给基于LED的照明并且在图像检测阵列235处形成和检测到最佳图像。
图像捕获和缓冲子系统225的主要功能是(1)由该系统的图像形成光学器件234检测聚焦到2D图像检测阵列235上的整个2D图像，(2)为所捕获的图像帧的所选择的感兴趣区域，或者为整个检测的图像生成数字像素数据帧，然后(3)在捕获到每个图像数据帧时对其进行缓冲。
特别是，在该说明性实施例中，该系统具有单拍摄和视频成像模式。在单拍摄模式下，在每个图像捕获和处理周期内，或者在处理周期的特定阶段期间捕获单个2D图像帧(31)。在视频成像模式下，该系统持续地捕获该FOV中的对象的数字图像帧。这些模式在通过引用全部结合于此的US专利公开第2008/0314985A1号中进一步详细地说明了。
数字图像处理子系统226的主要功能是在照明和操作模式期间处理由图像捕获和缓冲子系统225已经捕获并缓冲的数字图像。这样的图像处理操作包括基于图像的条形码解码方法，如在通过引用结合于此的US专利第7128266号中描述的。
输入/输出子系统227的主要功能是支持与主机系统9和其他外部装置的通用的、标准的和/或专有的数据通信接口，并且通过这样的通信接口把经处理的图像数据等输出给主机系统9和/或装置。这样的接口的示例和用于实现其的技术在通过引用结合于此的US专利第6619549号中给出。
系统控制子系统230的主要功能是当操作在图1D中所示的其移动数字成像操作模式下时，把某预定程度的控制、协调和/或管理信令服务提供给集成在该系统内的每个子系统部件。而且，当数字成像模块200对接在对接口288中并且与数据/功率/控制接口285接口连接时，如图2中所示，系统控制子系统230将在主控制子系统37的控制下起到从控制器的作用。虽然在本公开内容的优选实施例中，可以由经编程的微处理器来实现此子系统，但是此子系统可以通过在通过引用结合于此的US专利第7,128,266号中所描述的微计算平台上所支持的三层软件架构来实现。
与外壳集成的可手动激励的触发开关205的主要功能是在图1D中所示的移动数字成像期间使得用户能够在手动压下它(即引起触发事件)时生成控制激活信号(即触发事件信号)，并且能够把此控制激活信号提供给系统控制子系统230以供在执行本文详细地描述的其复杂系统和子系统控制操作时使用。
系统存储器中的系统配置参数(SCP)表229A的主要功能是为可用特征和功能中的每一个存储(在非易失/永久存储器中)一组系统配置和控制参数(即SCP)和所支持的可编程系统操作模式，并且其可以在系统控制子系统230的复杂操作期间根据需要被自动读取和使用。特别地，可以如在通过引用结合于此的共同待决的US公开第2008/0314985A1号中非常详细地教导的那样对这样的SCP进行动态地管理。
图4描述了当把图1A至3的混合扫描/成像码符号读取系统配置为图1A和1C中所支持的示出的其混合扫描/成像操作模式时所执行的主要步骤。
如在块A处所指示的，在销售点(POS)站，提供了双光学激光扫描和数字成像条形码符号读取系统。该双光学系统支持对接口(“接受器”)，其用于接纳手持式数字成像模块并在双光学系统和其数字成像模块之间建立数据、功率和控制接口。在该POS处，该双光学激光扫描系统和数字成像模块共同提供了双光学混合扫描/成像系统。
如在块B处所指示的，手持式数字成像器被插入到该对接口内，以在双光学混合系统和该手持式数字成像模块之间建立数据、功率和控制接口。
如在块C处所指示的，该手持式数字成像模块自动检测其到该对接口中的插入，去激活其可手动激励的触发机制和可见目标射束子系统，以及激活其自动对象存在检测子系统。
如块D处所指示的，该双光学混合系统自动检测数字成像模块到对接口中的插入，并且配置为其混合扫描/成像操作模式。
图5A和5B描述了在说明性实施例的双光学混合扫描/成像码符号读取系统内的系统控制器在其混合扫描/成像操作模式期间所支持的控制过程。
如在图5A中的块A处所指示的，对该系统进行初始化(即，重置参数，并且该系统处于睡眠模式)。
如块B，系统控制器确定安装在竖直或水平外壳系统中的IR唤醒检测器是否检测到操作者。如果在块B没有检测到唤醒事件，则该系统保持在块B处直到唤醒事件发生为止。当唤醒事件发生时，该系统控制器进行到块B1，在该处系统控制器确定在该FOV(例如，在极接近于竖直扫描窗口)内是否自动检测到对象(例如产品)。如果在该FOV中检测到了对象，则该系统控制器进行到图5B中的块G。如果在FOV中没有检测到对象，则该系统控制器进行到块C。
如在块C处所指示的，该系统重置计时器T1(唤醒计时器)和T2(激光扫描模式计时器)并且把激光扫描激活为操作，促使其多面体扫描元件旋转，跨该3D扫描体积生成和扫描激光扫描平面，收集并处理从定位于其中的对象离开的扫描数据，包括要读取的对象上的条形码符号。
在块D处，该系统控制器确定激光扫描子系统(15A和15B)是否在时间T2内读取到1D条形码符号。如果在块D处读取到1D条形码符号，则在块E处该系统控制器输出符号字符数据给主机系统。如果唤醒计时器(T1)在块F处尚未超时，则系统控制器返回到块D。如果唤醒计时器(T1)在块F处已经超时，则系统控制器返回到块B，如图5A中所示。
如果在块D处，该系统控制器确定该激光扫描子系统(15A和15B)在时间T2内未读取1D条形码符号，则在图5B中的块G处，系统控制器激活该数字成像子系统(即模块)200，并且如所示出的设置时间T3和T4。
在块H处，系统控制器确定该激光扫描子系统(15A、15B)和/或数字成像子系统200是否在时间T2内读取到1D条形码符号。如果是这样，则在块I处，系统控制器把符号字符数据输出给主机系统，然后在块J处确定是否已经经过了计时器T3。如果不是，则系统控制器返回到块H，如所示出的，以便有可能地读取其他1D条形码符号。
如果在块H处，系统控制器确定该激光扫描子系统(15A，15B)和/或数字成像子系统200不能在时间T2内读取1D条形码符号，则在块K处，系统控制器确定该数字成像子系统(即模块200)是否利用时限T4解码了2D条形码符号。如果是这样，则在块L处，该系统控制器把符号字符数据输出给主机系统，然后在块J处确定是否已经经过了计时器T4。如果该数字成像子系统未在时限T4内读取到2D条形码符号，则该系统控制器前进到块N，并且确定是否已经经过了该唤醒计时器T1。如果已经经过了计时器T1，则该系统控制器返回到块B，如图5A中所示。如果尚未经过计时器T1，则系统控制器返回到块C，重置计时器T1和T2，并且如所示出的仅激活该激光扫描子系统，并且沿着图5A中所示的控制回路继续进行。
想到的修改
已经把上面描述的控制过程作为在该混合系统正操作在其混合扫描/成像操作模式下时可以如何控制该激光扫描子系统和数字成像子系统的说明性示例来提供。对此控制过程的变体和修改对于受益于本公开内容的本领域技术人员而言是容易想到的。所有这样的修改和变体都被认为处于所附权利要求书的范围内。

Claims (11)

1.一种混合型双光学条形码符号读取系统，其支持混合激光扫描和数字成像操作模式，所述混合型双光学条形码符号读取系统包括：
具有竖直外壳部和水平外壳部的系统外壳，所述竖直外壳部具有竖直扫描窗口，所述水平外壳部具有水平扫描窗口；
设置在所述系统外壳中的激光扫描子系统，用于生成多个激光扫描平面并且把它们投射通过所述竖直和水平扫描窗口，其在所述竖直和水平扫描窗口之间限定的3D扫描体积内相交，并且在所述3D扫描体积内提供激光扫描图案，用于对所述3D扫描体积内的一个或多个对象进行扫描并产生扫描数据以进行解码处理；
扫描数据处理器，用于处理由所述激光扫描子系统产生的所述扫描数据以致力于读取经过所述3D扫描体积的每个对象上的条形码符号；
数字成像子系统，设置在所述系统外壳的所述竖直部内，用于通过所述竖直扫描窗口自动投射视场(FOV)，并且捕获和处理存在于所述FOV中的对象的一个或多个数字图像；
数字图像处理器，用于处理由所述数字成像子系统产生的所述一个或多个数字图像以致力于读取经过所述FOV的每个对象上的条形码符号；和
系统控制器，用于在所述混合激光扫描和数字成像操作模式期间控制所述激光扫描子系统和所述数字成像子系统的操作。
2.如权利要求1所述的混合型双光学条形码符号读取系统，其中所述FOV聚焦在所述竖直扫描窗口稍前，邻近所述3D扫描体积。
3.如权利要求1所述的混合型双光学条形码符号读取系统，其还包括自动对象检测器，其自动地用于当使得所述对象在非常靠近所述竖直扫描窗口的地方时自动地在所述FOV中检测对象的存在，并且响应于在非常靠近所述竖直扫描窗口的地方检测到所述对象而生成所述触发信号。
4.如权利要求3所述的混合型双光学条形码符号读取系统，其中如果所述激光扫描子系统在第一预定时限内未成功读取条形码符号，则在所述激光扫描子系统收集并处理扫描数据以致力于读取所述3D扫描体积中的对象上的条形码符号时，所述系统控制器还激活使得能够实现捕获和处理数字图像的所述数字成像子系统以致力于读取所述3D扫描体积中的所述对象上的条形码符号。
5.如权利要求4所述的混合型双光学条形码符号读取系统，其中如果所述自动对象检测器在非常靠近所述竖直扫描窗口的地方检测到对象，则所述自动对象检测器自动触发所述数字成像子系统以对所述FOV中的所述对象进行照明，并且捕获和处理所述对象的一个或多个数字图像以致力于读取所述对象上的条形码符号。
6.如权利要求1所述的混合型双光学条形码符号读取系统，其中所述竖直外壳部包括一个或多个激光模式折叠式反射镜，并且在所述激光扫描模式折叠式反射镜中的一个被用来折叠和投射所述FOV至所述3D扫描体积中。
7.一种混合型双光学条形码符号读取系统，其支持混合激光扫描和数字成像操作模式，所述混合型双光学条形码符号读取系统包括：
具有竖直外壳部和水平外壳部的系统外壳，所述竖直外壳部具有竖直扫描窗口，所述水平外壳部具有水平扫描窗口；
设置在所述系统外壳中的激光扫描子系统，用于生成多个激光扫描平面并且把它们投射通过所述竖直和水平扫描窗口，其在所述竖直和水平扫描窗口之间限定的3D扫描体积内相交，并且在所述3D扫描体积内提供激光扫描图案，用于对所述3D扫描体积内的一个或多个对象进行扫描并产生扫描数据以进行解码处理；
扫描数据处理器，用于处理由所述激光扫描子系统产生的所述扫描数据以致力于读取经过所述3D扫描体积的每个对象上的条形码符号；
数字成像子系统，设置在所述系统外壳的所述竖直部内，用于通过所述竖直扫描窗口自动投射视场(FOV)，并且捕获和处理存在于所述FOV中的对象的一个或多个数字图像；
数字图像处理器，用于处理由所述数字成像子系统产生的所述一个或多个数字图像以致力于读取经过所述FOV的每个对象上的条形码符号；和
系统控制器，用于在所述混合激光扫描和数字成像操作模式期间控制所述激光扫描子系统和所述数字成像子系统的操作；
其中所述数字成像子系统和所述数字图像处理器被实现为具有被提供有第一数据/功率/控制接口电路的模块外壳的数字成像模块；和
其中所述系统外壳包括用于接纳所述模块外壳并具有第二数据/功率/控制接口电路和接受器的对接口，使得在所述第一和第二数据/功率/控制接口电路之间建立接口。
8.如权利要求7所述的混合型双光学条形码符号读取系统，其中在所述数字成像模块对接在所述对接口内时，所述对接口内的所述数据/功率/控制接口电路支持数据通信、充电和控制操作。
9.如权利要求7所述的混合型双光学条形码符号读取系统，其中所述数字成像模块具有可手持外壳并且当操作者把所述数字成像模块从所述对接口移出时支持移动数字成像操作模式；以及其中，当所述数字成像模块从所述对接口移出并且握在所述操作者的手中时，所述FOV被聚焦为能够读取沿着所述数字成像模块的工作范围定位的条形码符号。
10.如权利要求9所述的混合型双光学条形码符号读取系统，其包括安装在所述系统外壳中的第一无线RF收发器，以及其中所述数字成像模块包括安装在所述可手持模块外壳内的第二无线RF收发器，用于在所述移动数字成像操作模式期间在所述第一无线RF收发器和所述第二无线RF收发器之间建立两路无线数据通信链路。
11.如权利要求7所述的混合型双光学条形码符号读取系统，其中所述对接口被提供在所述系统外壳的竖直外壳部中；其中当对接在所述对接口内时，所述数字成像模块同所述系统外壳的竖直部内支持的一组视场(FOV)折叠式反射镜合作，用于向外投射所述FOV到所述3D扫描体积中。
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