Vehicle speed calculating method and device and driver state monitoring system including vehicle speed calculating device

Abstract

Vehicle speed calculating device and method and a driver state monitoring system including the vehicle speed calculating device are provided. The vehicle speed calculating device includes: a signal determining unit configured to receive raw data input from a raw data generating device connected to an input socket via a UART port and a GPIO port, to perform a validation test on two types of raw data received via the UART port and the GPIO port, to determine one type of raw data as valid raw data, and to output the valid raw data and signal type information generated to correspond to the valid raw data; and a vehicle speed calculating unit configured to receive the valid raw data and the signal type information and to generate vehicle speed information corresponding to a vehicle speed which is calculated by processing the valid raw data using a predetermined processing method to match the signal type information.

Dependencies are inferred from the claim text.