DETECTION OF STUCK IN RANGE SENSOR AND METHOD

摘要

A method for detecting a sensor that is stuck in range includes computing a variation value for each of a first signal and a second signal generated by a respective first and second sensor, wherein the first and second signals are correlated signals. The variation value for each of the first and second signals is computed for the same diagnostic period, such that when one of the first and second sensors is generating a signal which is stuck in range during the diagnostic period, the signal stuck in range will be characterized by a variation value which is much less than the variation value of the correlated signal. The magnitude of difference between the variation values of the first and second signals can be compared to a predetermined fault threshold to diagnose a sensor stuck in range.

主权项

1. A method of diagnosing a stuck in range sensor, the method comprising:
receiving a monitored signal from a monitored sensor; receiving a correlated signal from a correlated sensor; wherein the correlated signal is correlated to the monitored signal; determining a variation value of the monitored signal; determining a variation value of the correlated signal; and determining a state of the monitored sensor based on a magnitude of a difference between the variation value of the monitored signal and the variation value of the correlated signal.