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    • 63. 发明授权
    • Diagnosing a bridge sensor
    • 诊断桥传感器
    • EP2511713B1
    • 2017-09-27
    • EP12163807.6
    • 2012-04-11
    • Melexis Technologies NV
    • Raman, JohanRombouts, Pieter
    • G01R31/00G01L1/22G01L1/14G01L9/02G01L9/12G01L9/06G01R31/28G01L9/04
    • G01R31/003G01L1/144G01L1/2262G01L9/02G01L9/04G01L9/06G01L9/12G01R31/2829
    • The present invention provides a difference measurement circuit (60) comprising a first port (P1, P1') and a second port (P2, P2') for connection to a first set of nodes (A, B) and a second set of nodes (C, D) of a sensor unit. The circuit (60) further comprises switching units (61, 62) for switching excitation signals emanating from excitation nodes (C', D') from being applied to the first set of nodes (A, B) via the first port (P1, P1') to being applied to the second set of nodes (C, D) via the second port (P2, P2') and for switching differential measurement signals measured at sensing nodes (A', B') from being obtained from the second set of nodes (C, D) via the second port (P2, P2') to being obtained from the first set of nodes (A, B) via the first port (P1, P1'). The present invention also provides a corresponding method. The circuit (60) further comprises redundancy testing circuitry for evaluating the similarity or deviation between measurement signals obtained in different states of the switching units (61, 62).
    • 本发明提供了一种差分测量电路(60),包括用于连接到第一组节点(A,B)的第一端口(P1,P1')和第二端口(P2,P2')以及第二组节点 (C,D)。 电路(60)还包括用于切换从激励节点(C',D')发出的激励信号经由第一端口(P1,B)被施加到第一组节点(A,B)的切换单元(61,62) P1')经由第二端口(P2,P2')被施加到第二组节点(C,D),并且用于切换在感测节点(A',B')处测量的差分测量信号以从第二端口 经由第二端口(P2,P2')经由第一端口(P1,P1')从第一组节点(A,B)获得节点集合(C,D)。 本发明还提供了相应的方法。 电路(60)还包括冗余测试电路,用于评估在开关单元(61,62)的不同状态下获得的测量信号之间的相似性或偏差。