Wheel speed sensor interface, operation method thereof, and electronic control system including the same

摘要

Provided is a wheel speed sensor interface. The wheel speed sensor interface includes: a speed pulse detection circuit configured to receive a plurality of sensor signals including wheel speed information of a vehicle, detect a plurality of speed pulses on the basis of the plurality of the received sensor signals, and transmit the plurality of the detected speed pulses to an external device; and a comparison speed detection circuit configured to generate a plurality of counting values by counting each of the detected speed pulses, generate comparison speed information by multiplexing the plurality of the generated counting values through a time division method, and transmit the generated comparison speed information to the external device.

主权项

1. An electronic control system of a vehicle comprising a wheel speed sensor interface, a micro control unit, and a wheel speed sensor unit, the wheel speed sensor interface comprising:
a speed pulse detection circuit configured to receive a plurality of sensor signals, each of the plurality of sensor signals including a plurality of pulses indicative of wheel speed information of a vehicle at different times, detect the plurality of pulses to generate a corresponding one of a plurality of speed pulse signals, and transmit the generated speed pulse signals to the micro control unit; and a comparison speed detection circuit including a plurality of counters each configured to count a number of pulses of a corresponding one of the speed pulse signals during a predetermined period to generate a corresponding one of a plurality of counting values, and a time division multiplexer configured to generate comparison speed information by multiplexing the plurality of counting values based on a time division method, and transmit the generated comparison speed information to the micro control unit; and the micro control unit configured to detect an error of speed pulse signals based on the comparison speed information and control the vehicle based on the speed pulse signals.