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1.发明公开METHODS AND APPARATUS TO DETECT LEAKAGE CURRENT IN A RESISTANCE TEMPERATURE DETECTOR 有权方法和设备越流在电阻温度传感器检测
公开(公告)号：EP2847562A2
公开(公告)日：2015-03-18
申请号：EP13724082.6
申请日：2013-05-07
CPC分类号： G01R31/025 , G01K7/16 , G01K15/007 , G01K19/00
摘要： Methods and apparatus to detect leakage current in a resistance temperature detector are disclosed. An example method includes providing a resistance temperature detector circuit with a first resistance circuit and a second resistance circuit, measuring a first voltage at the first resistance circuit in response to applying a first current to the first resistance circuit, measuring a second voltage at the second resistance in response to applying a second current to the second resistance circuit, comparing the first and second voltages to determine a difference value, and determining that a current leak exists in the resistance temperature detector circuit when the difference value is not within a first range.
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2.发明公开METHODS AND APPARATUS TO IDENTIFY A COMMUNICATION PROTOCOL BEING USED IN A PROCESS CONTROL SYSTEM 审中-公开方法和装置用于识别通信协议用在过程控制系统
公开(公告)号：EP2847968A1
公开(公告)日：2015-03-18
申请号：EP13722959.7
申请日：2013-05-07
发明人： LIU, Xuedong
IPC分类号： H04L29/06 , G05B19/418 , H04L29/08 , H04L12/00
CPC分类号： G06F13/385 , G06F13/4063 , G06F13/42 , G06F13/4226 , G06F13/4286 , H04L67/12 , H04L69/18
摘要： Methods and apparatus to identify a communication protocol being used in a process control system are disclosed. An example method includes determining a message structure of a process control message received via a port, determining that the message structure corresponds to a first one of a plurality of process control message protocols, and processing the process control message according to the first process control message protocol.
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3.发明授权METHODS AND APPARATUS TO DETECT LEAKAGE CURRENT IN A RESISTANCE TEMPERATURE DETECTOR 有权方法和设备越流在电阻温度传感器检测
公开(公告)号：EP2847562B1
公开(公告)日：2016-07-06
申请号：EP13724082.6
申请日：2013-05-07
CPC分类号： G01R31/025 , G01K7/16 , G01K15/007 , G01K19/00
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