Method and device for plausibilizing a sensor signal of a single-track vehicle

A plausibilization device configured to ascertain a reliability of a sensor signal of a single-track vehicle, comprising a processor configured to:

• estimate a gear ratio of the single-track vehicle at multiple points in time between a wheel speed and a pedaling frequency and/or a drive speed;
• ascertain a value of a reliability indicator based on the estimated gear ratios, the value of the reliability indicator being ascertained using a statistical parameter including a variance of the estimated gear ratios and/or a histogram of the estimated gear ratios;
• and
• plausibilize the sensor signal using the value of the reliability indicator and a threshold value, the threshold value corresponding to a maximally permissible value of the reliability indicator,
• wherein, in a fault-free state, the estimated gear ratio remains constant over time, and/or the histogram of the estimated gear ratios includes narrow peaks corresponding to actual gear ratios of the vehicle, and wherein a smudging or broadening of the peaks in the histogram indicates a malfunction of a sensor even when the variance remains below the threshold value.

A system, comprising:

• a single-track vehicle;
• and
• a plausibilization device configured to ascertain a reliability of a sensor signal of the single-track vehicle, including a processor configured to:
• estimate a gear ratio of the single-track vehicle at multiple points in time between a wheel speed and a pedaling frequency and/or a drive speed,
• ascertain a value of a reliability indicator based on the estimated gear ratios, the value of the reliability indicator being ascertained using a statistical parameter including a variance of the estimated gear ratios and/or a histogram of the estimated gear ratios, and
• plausibilize the sensor signal using the value of the reliability indicator and a threshold value, the threshold value corresponding to a maximally permissible value of the reliability indicator,
• wherein, in a fault-free state, the estimated gear ratio remains constant over time, and/or the histogram of the estimated gear ratios includes narrow peaks corresponding to actual gear ratios of the vehicle, and wherein a smudging or broadening of the peaks in the histogram indicates a malfunction of a sensor even when the variance remains below the threshold value.