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    • 4. 发明申请
    • System and method for indicating validity of calibration certifications
    • 用于指示校准认证有效性的系统和方法
    • US20070012789A1
    • 2007-01-18
    • US11182376
    • 2005-07-15
    • Nicholas HartneyWinston WebbDavid Vella
    • Nicholas HartneyWinston WebbDavid Vella
    • G06K19/06G06K7/10G06K19/00
    • G06K19/06046G06K19/067
    • An improved system and method for automatically indicating the validity of calibration certifications is disclosed. For one example, a self-terminating calibration certification system is disclosed as a label with a first layer including a thermally-activated material with a bar code printed on one side, a heater element on the second side of the first layer, and a second layer of material affixed to the second side. A processing unit, a power unit, and a transmitter/receiver unit are affixed to one side of the second layer, and an adhesive material is affixed to the second side of the second layer. Thus, the label can be affixed semi-permanently to the measurement instrument or item of test equipment involved. When the measurement instrument or item of test equipment is calibrated, the processing unit starts an internal clock that counts down (or up) to the calibration certification due date. On that date when the calibration certification expires, the processing unit activates the heater element, and the heat generated by the heater element reacts with the thermally-activated material and changes the color of a significant portion of the bar code region. Consequently, after the calibration certification for that measurement instrument or item of test equipment has expired, the bar code on the certification label cannot be scanned in and is no longer visibly readable. Therefore, a user can readily observe from the color of the certification label that the certification for that measurement instrument or item of test equipment is either valid or invalid. Also, invalid bar code information on the label cannot be inadvertently scanned in.
    • 公开了一种用于自动指示校准认证的有效性的改进的系统和方法。 作为一个示例,公开了自终端校准认证系统作为标签,其具有第一层,第一层包括热活化材料,其中一侧印有条形码,第一层的第二侧的加热元件,以及第二层的第二层 固定在第二面的材料层。 处理单元,动力单元和发送/接收单元被固定到第二层的一侧,并且粘合材料固定到第二层的第二侧。 因此,标签可以半永久地固定在测量仪器或相关测试设备的项目上。 当测量仪器或测试设备的项目被校准时,处理单元启动向校准认证到期日倒计时(或向上)的内部时钟。 在校准认证到期的那一天,处理单元激活加热器元件,并且由加热器元件产生的热与热活化材料反应并改变条形码区域的重要部分的颜色。 因此,在该测量仪器或测试设备项目的校准认证已过期之后,认证标签上的条形码不能被扫描并且不再可见。 因此,用户可以从认证标签的颜色中容易观察到该测量仪器的认证或测试设备的项目是有效的或无效的。 此外,无法无意中扫描标签上的无效条形码信息。