公开(公告)号：US06939037B2

公开(公告)日：2005-09-06

申请号：US10399152

申请日：2002-07-06

申请人： Erich Junginger ,  Dietmar Blessing ,  Christian Zimmermann ,  Wilhelm Haag ,  Frank Molwitz ,  Rene Schenk ,  Bernd Hilgenberg ,  Johann Riegel

发明人： Erich Junginger ,  Dietmar Blessing ,  Christian Zimmermann ,  Wilhelm Haag ,  Frank Molwitz ,  Rene Schenk ,  Bernd Hilgenberg ,  Johann Riegel

IPC分类号： G01K7/26 ,  F02D41/14 ,  G01N27/41 ,  G01N27/419 ,  G01K1/00 ,  F02D41/00 ,  G01K17/16 ,  G01N25/00

CPC分类号： F02D41/1496

摘要： For achieving a highest possible measuring accuracy of a circuit for measuring the internal resistance of an exhaust-gas sensor, a method and a circuit for measuring the internal resistance R1 (10) of an electrochemical cell (12) are provided for determining the temperature of an exhaust-gas sensor, especially of a motor vehicle. The circuit is provided with the objective to improve the control to a constant temperature to therefore also improve the performance of the exhaust-gas sensor. A measurement current I_Mess (20) is applied to the internal resistance R1 (10) of the electrochemical cell (12) and a resulting first voltage is detected. A switchover to a reference resistor R2 takes place from time to time or at regular time intervals. With a switchover to the reference resistor R2, the resulting second voltage is stored and thereafter is applied as a reference value for the measurement of the internal resistance R1 (10). The switchover (18) to the reference resistor R2 takes place, for example, via force/sense lines.

摘要翻译： 为了实现用于测量排气传感器的内部电阻的电路的最高测量精度，提供了用于测量电化学电池（12）的内部电阻R 1（10）的方法和电路，用于确定温度 的废气传感器，特别是机动车辆。 该电路的目的是改善对恒温的控制，从而也提高废气传感器的性能。 将测量电流I_Mess（20）施加到电化学电池（12）的内部电阻R 1（10），并且检测到所得到的第一电压。 对参考电阻R 2的切换是不时或以规律的时间间隔进行的。 通过切换到参考电阻器R 2，存储所得到的第二电压，然后施加作为用于测量内部电阻R 1（10）的参考值。 例如，通过力/感测线进行到参考电阻器R 2的切换（18）。

公开(公告)号：US6067035A

公开(公告)日：2000-05-23

申请号：US905263

申请日：1997-08-01

申请人： Wolfgang Kosak ,  Guenter Braun ,  Margit Mueller ,  Dietmar Blessing

发明人： Wolfgang Kosak ,  Guenter Braun ,  Margit Mueller ,  Dietmar Blessing

IPC分类号： H03M1/10 ,  G06F3/05 ,  G06F11/00

CPC分类号： H03M1/109 ,  H03M1/12

摘要： A method is distinguished in that outside of the analog/digital converter, on the basis of an analog signal (UA) to be digitized by the analog/digital converter, a sequence of digital pulses (P2) is generated, of which at least the width or the repetition frequency is analog signal-dependent, and that a digital result determined based on the pulse sequence and the digital value generated on the basis of the same analog signal by the analog to digital converter are checked for conformance with one another. As such, in a simple manner, a continuous monitoring of the A/D converter to be monitored is rendered possible during its "normal" operation.

摘要翻译： 一种方法的区别在于，在模拟/数字转换器的外部，基于要由模拟/数字转换器数字化的模拟信号（UA），产生数字脉冲序列（P2），其中至少 宽度或重复频率是模拟信号相关的，并且检查基于脉冲序列确定的数字结果和由模数转换器基于相同模拟信号产生的数字值彼此一致。 因此，以简单的方式，可以在其“正常”操作期间连续监视要监视的A / D转换器。