Patent ID: 8670954

Claim:
A train load determining system, the system comprising: a speed/acceleration measuring unit configured to measure a speed and an acceleration of a train; a position measuring unit configured to measure a current position of the train; a railway-line state receiving unit configured to receive a railway-line state; a driving/braking force receiving unit configured to receive information relating to driving and braking forces of the train; a calculating unit configured to calculate a train load based on information transferred from the speed/acceleration measuring unit, the position measuring unit, the railway-line state receiving unit, and the driving/braking force receiving unit; and wherein the railway-line state receiving unit receives the railway-line state at the current position of the train by: receiving railway-line slope information related to the current position of the train, wherein the railway-line slope information is received from a railway-line slope database; receiving railway-line curve information related to the current position of the train, wherein the railway-line curve information is received from a railway-line curve database; and receiving weather information, wherein the weather information is received from a weather information center; wherein the calculating unit calculates the train load based on the following expression: W = m ⁢ ⁢ g = ( F - r 2 ⁢ V 2 - k ρ ) ⁢ g a + ( r 0 + r 1 ⁢ V + sin ⁢ ⁢ θ ) ⁢ g ; where: ‘F’ denotes a driving or braking force of the train; ‘V’ denotes the speed of the train; ‘a’ denotes the acceleration of the train; ‘m’ denotes a mass of the train; ‘W’ denotes the train load; ‘r 0 ,’ ‘r 1 ’ and ‘r 2 ’ denote coefficients of a driving resistance model; ‘θ’ denotes railway-line slope angle; ‘ρ’ denotes railway-line curve radius; ‘g’ denotes gravity; and ‘k’ denotes curve resistance coefficient.