Speed measurement system and method thereof for railroad cars using correlation of two acceleration data

PURPOSE: A system for measuring the speed of a railway vehicle using the correlation of axle acceleration and a method thereof are provided to accurately measure the speed of a running train by calculating a speed using only the vibration data of a vehicle which is measured by two accelerometers. CONSTITUTION: A measurement system(10) includes 2 accelerometers(11, 12) and an A/D converter(13). The 2 accelerometers are arranged to the progressive direction of a vehicle at a certain interval. The A/D converter changes an analog signal, which is inputted from the 2 accelerometers, into a digital signal. An analysis device(20) receives the digital signal converted in the A/D converter and calculates a Δt of a delay time. The analysis device calculates the speed of a railway vehicle using a distance value between the two accelerometers and a calculated result value.