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    • 4. 发明授权
    • Bar code reader for reading high to low contrast bar code symbols
    • 用于读取高对比度条形码符号的条形码阅读器
    • US5949054A
    • 1999-09-07
    • US546588
    • 1995-10-23
    • Thomas W. KarpenWilliam H. HavensDennis W. McEneryBrian L. Jovanovski
    • Thomas W. KarpenWilliam H. HavensDennis W. McEneryBrian L. Jovanovski
    • G06K7/10G06K7/14
    • G06K7/10851G06K7/14G06K7/1478
    • A bar code reader is provided which can read bar code symbols of varying contrast, from high to medium to low contrast. The bar code reader includes a digitizing circuit which digitizes an analog signal representing the reflectance function of a scanned bar code by comparing the analog signal to a threshold signal. In the present invention, the threshold signal is switchable between a first state wherein the threshold signal is a standard threshold signal suitable for digitizing analog signals representing medium to high contrast bar code symbols and a second state wherein the threshold signal is a non-standard threshold signal suitable for digitizing analog signals representing low contrast bar code symbols. In one embodiment of the invention, the threshold signal is manually adjustable. In another embodiment, a bar code reader is provided which automatically digitizes and decodes bar code symbols of varying contrast by repetitively scanning bar code symbols, using first and second alternating threshold signal states to digitize the analog signal resulting from each scan.
    • 提供了条形码阅读器,可以读取从高到中至低对比度的不同对比度的条形码符号。 条形码读取器包括数字化电路,其通过将模拟信号与阈值信号进行比较来数字化表示扫描条形码的反射函数的模拟信号。 在本发明中,阈值信号可以在第一状态和第二状态之间切换,第一状态是阈值信号是适合于对表示中高对比度条形码符号的模拟信号进行数字化的标准阈值信号,以及第二状态,其中阈值信号是非标准阈值 信号适合于数字化表示低对比度条形码符号的模拟信号。 在本发明的一个实施例中,阈值信号是可手动调节的。 在另一个实施例中,提供了一种条形码读取器,其通过使用第一和第二交替阈值信号状态来重复扫描条形码符号来自动数字化和解码变化对比度的条形码符号,以对由每次扫描得到的模拟信号进行数字化。
    • 7. 发明授权
    • Remote video inspection system integrating audio communication functionality
    • 远程视频检测系统集成了音频通信功能
    • US07956888B2
    • 2011-06-07
    • US11472869
    • 2006-06-22
    • Thomas W. Karpen
    • Thomas W. Karpen
    • H04N7/18
    • G02B23/2484A61B1/00039A61B1/00041A61B1/00055A61B1/05A61B1/053G01N21/954
    • Remote viewing devices and methods are provided to communicate audio information to and/or from a user of the remote viewing device. The audio information can serve an entertainment purpose, and/or can be instructional in order to provide training, guidance and/or feedback to the user prior to or during the inspection process. The audio information can be stored onto physical media such as a CD/DVD disk or a tape, or can be stored as data, such as MP3 data stored within memory accessible to the device. Outputted audio information can be generated by one or more speakers located within the body of the device or located within a headset having a wire line or wireless connection with the remote viewing device.
    • 提供远程查看设备和方法以将音频信息传送到远程观看设备的用户和/或从远程观看设备的用户传送。 音频信息可以用于娱乐目的,和/或可以是教学的,以便在检查过程之前或期间向用户提供训练,指导和/或反馈。 音频信息可以存储在诸如CD / DVD盘或磁带的物理介质上,或者可以作为数据存储,诸如存储在设备可访问的存储器内的MP3数据。 输出的音频信息可以由位于设备主体内的一个或多个扬声器产生,或者位于具有与远程观看设备的有线或无线连接的耳机内。