| 摘要 |
In an acceleration sensor (1) having two redundantly arranged micromechanical sensor elements (2, 3) with redundant signal paths each having an A/D converter (4, 5), the invention proposes, in order to check the plausibility of the output signals (14, 15) from the acceleration sensor (1) using monitoring means (8, 9, 10), that the monitoring means (8, 9, 10) comprise an equivalent circuit (8) for a sensor element (2, 3), which is integrated in the evaluation unit, and a redundant, further A/D converter (9) which converts the fixed acceleration-independent output signal from the equivalent circuit (8) on the basis of the common operating parameters of all A/D converters (4, 5, 9). This makes it possible to detect false tripping of an airbag on account of faults in the two A/D converters (4, 5). |
