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1. 发明申请

US20070205791A1 Method and apparatus for strain monitoring of printed circuit board assemblies 有权
标题翻译：印刷电路板组件应变监测方法和装置
公开(公告)号：US20070205791A1
公开(公告)日：2007-09-06
申请号：US11358271
申请日：2006-02-21
申请人： Mudasir Ahmad , Sue Teng
发明人： Mudasir Ahmad , Sue Teng
IPC分类号： G01R31/26
CPC分类号： G01R31/2817 , H05K1/0268 , H05K1/0271 , H05K2201/10151 , H05K2203/163
摘要： A technique of monitoring strain on a printed circuit board assembly involves the use of a strain detector mounted on a printed circuit board. The strain detector is formed of a non-ductile material. The strain detector has a narrowed portion forming a weak link that has a characteristic of breaking when a critical strain limit is exceeded. The method of monitoring can include visual or electrical inspection. The electrical inspection can include having a strain monitoring device. The strain monitoring device has a timer connected to at least one strain detector and a memory for storing results connected to the timer. The capacitance of at least one of the strain detectors is sampled and any change in capacitance is recorded to the memory. In one embodiment, a time stamp occurs in the memory based on when an electrical property changes across at least one of the strain detectors.
摘要翻译：监测印刷电路板组件上的应变的技术包括使用安装在印刷电路板上的应变检测器。应变检测器由非延性材料形成。应变检测器具有形成弱连接的变窄部分，当超过临界应变极限时具有断裂特性。监控方法可以包括视觉或电气检查。电气检查可以包括具有应变监测装置。应变监测装置具有连接到至少一个应变检测器的定时器和用于存储连接到定时器的结果的存储器。对应变检测器中的至少一个的电容进行采样，并将任何电容变化记录到存储器中。在一个实施例中，基于电特性在应变检测器中的至少一个上变化的时间戳发生在存储器中。

2. 发明授权

US07621190B2 Method and apparatus for strain monitoring of printed circuit board assemblies 有权
标题翻译：印刷电路板组件应变监测方法和装置
公开(公告)号：US07621190B2
公开(公告)日：2009-11-24
申请号：US11358271
申请日：2006-02-21
申请人： Mudasir Ahmad , Sue Teng
发明人： Mudasir Ahmad , Sue Teng
IPC分类号： G01L1/22
CPC分类号： G01R31/2817 , H05K1/0268 , H05K1/0271 , H05K2201/10151 , H05K2203/163
摘要： A technique of monitoring strain on a printed circuit board assembly involves the use of a strain detector mounted on a printed circuit board. The strain detector is formed of a non-ductile material. The strain detector has a narrowed portion forming a weak link that has a characteristic of breaking when a critical strain limit is exceeded. The method of monitoring can include visual or electrical inspection. The electrical inspection can include having a strain monitoring device. The strain monitoring device has a timer connected to at least one strain detector and a memory for storing results connected to the timer. The capacitance of at least one of the strain detectors is sampled and any change in capacitance is recorded to the memory. In one embodiment, a time stamp occurs in the memory based on when an electrical property changes across at least one of the strain detectors.
摘要翻译：监测印刷电路板组件上的应变的技术包括使用安装在印刷电路板上的应变检测器。应变检测器由非延性材料形成。应变检测器具有形成弱连接的变窄部分，当超过临界应变极限时具有断裂特性。监控方法可以包括视觉或电气检查。电气检查可以包括具有应变监测装置。应变监测装置具有连接到至少一个应变检测器的定时器和用于存储连接到定时器的结果的存储器。对应变检测器中的至少一个的电容进行采样，并将任何电容变化记录到存储器中。在一个实施例中，基于电特性在应变检测器中的至少一个上变化的时间戳发生在存储器中。

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