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2. 发明授权

US5386441A Fault tolerant signal validation for feedwater control system 失效
标题翻译：给水控制系统的容错信号验证
公开(公告)号：US5386441A
公开(公告)日：1995-01-31
申请号：US720039
申请日：1991-06-24
申请人： Lawrence E. Erin , William J. Catullo, Jr. , Richard E. Paris , John M. Gallagher
发明人： Lawrence E. Erin , William J. Catullo, Jr. , Richard E. Paris , John M. Gallagher
IPC分类号： G21C17/035 , G21D3/00 , G21D3/14 , G21C7/36
CPC分类号： G21D3/14 , Y02E30/40
摘要： In a nuclear reactor the feedwater control system receives steam generator water level signals, including information to determine signal quality. The signal quality and additional signal validation determine how the water level signals are to be used by the feed-water control system. In the preferred embodiment, each water level signal is compared with a possible range and the difference or differential between all possible pairs of the signals is calculated and compared with an acceptable differential range. While alarms are sounded if any of these checks on the water level signals indicate an invalid signal, the water level signals are used to calculate a median level signal until there is less than two water level signals with good quality within the possible range or all differentials are outside the acceptable differential range. Thus, a single bad signal does not affect median signal selection, but the feedwater control system automatically switches to manual when a second invalid signal is detected, thereby preventing an inappropriate control action.
摘要翻译：在核反应堆中，给水控制系统接收蒸汽发生器水位信号，包括确定信号质量的信息。信号质量和附加信号验证决定了供水控制系统如何使用水位信号。在优选实施例中，将每个水位信号与可能的范围进行比较，并计算所有可能的信号对之间的差或差，并将其与可接受的差分范围进行比较。如果在水位信号上的这些检查中的任何一个信号表示无效信号，则会发出警报，水位信号用于计算中值电平信号，直到在可能范围内或所有差分中存在质量差的两个水位信号在可接受的差速范围之外。因此，单个不良信号不影响中值信号选择，但是当检测到第二无效信号时，给水控制系统自动切换到手动，从而防止不适当的控制动作。

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