Patent ID: 8725324

Claim:
A load compensating device in a railway vehicle, the railway vehicle including a plurality of railway sub-vehicles, the device comprising: a pressure sensor configured to detect an air spring pressure in response to loads of the railway sub-vehicles; a first estimation unit configured to output an estimated railway vehicle load by estimating each load of the plurality of railway sub-vehicles using a speed of the railway vehicle, an acceleration of each of the plurality of railway sub-vehicles, and a traction of each of the plurality of railway sub-vehicles; a detection unit configured to detect a fault of the load compensating device caused by fault of the pressure sensor by receiving the air spring pressure and the estimated railway vehicle load, and outputting a railway vehicle load; and a first conversion unit configured to convert the railway vehicle load received from the detection unit to a load signal wherein the detection unit comprises: a second conversion unit configured to measure a pressure of an air spring and convert the pressure to a measured vehicle load, a generation unit configured to generate a residual value from the measured vehicle load and the estimated railway vehicle load, a determination unit configured to determine whether the pressure sensor or load compensating device includes a fault if the residual value is less than a predetermined value, a selection unit configured to select and output one of the measured railway vehicle load and the estimated railway vehicle load according to a determination of the determination unit, and a third conversion unit configured to convert the railway vehicle load selected by the selection unit to a pressure signal and output the pressure signal.