Acceleration monitoring device, acceleration monitoring method, and program

An acceleration monitoring method comprising:

• acquiring a measurement acceleration waveform which is an acceleration waveform measured by a vehicle running on one of a plurality of running lanes on a track, wherein
• the measurement acceleration waveform includes
• a first measurement acceleration waveform measured by a first acceleration sensor mounted on a vehicle body of the vehicle, and
• a second measurement acceleration waveform measured by a second acceleration sensor mounted on a bogie of the vehicle;
• monitoring an acceleration value of a non-linear expansion and contraction measurement acceleration waveform which is an acceleration waveform corresponding to a reference acceleration waveform which is an acceleration waveform as a reference for the measurement acceleration waveform for a predetermined region of interest which is a partial region of the track by nonlinearly expanding and contracting a time axis of the measurement acceleration waveform, wherein
• the reference acceleration waveform includes
• a first reference acceleration waveform for each of the plurality of running lanes corresponding to the first acceleration sensor, and
• a second reference acceleration waveform for each of the plurality of running lanes corresponding to the second acceleration sensor;
• identifying a running lane of the plurality of running lanes in which the vehicle runs by comparing a correlation coefficient between (i) a non-linear expansion and contraction measurement acceleration waveform corresponding to the first reference acceleration waveform by nonlinearly expanding and contracting a time axis of the first measurement acceleration waveform, and (ii) a corresponding first reference acceleration waveform, for each of the plurality of running lanes;
• and
• upon the running lane being identified, monitoring the acceleration value based on the second measurement acceleration waveform.

A non-transitory computer-readable recording medium storing a program that causes a computer to execute:

• acquiring a measurement acceleration waveform which is an acceleration waveform measured by a vehicle running on one of a plurality of running lanes on a track, wherein
• the measurement acceleration waveform includes
• a first measurement acceleration waveform measured by a first acceleration sensor mounted on a vehicle body of the vehicle, and
• a second measurement acceleration waveform measured by a second acceleration sensor mounted on a bogie of the vehicle;
• monitoring an acceleration value of a non-linear expansion and contraction measurement acceleration waveform which is an acceleration waveform corresponding to a reference acceleration waveform which is an acceleration waveform as a reference for the measurement acceleration waveform for a predetermined region of interest which is a partial region of the track by nonlinearly expanding and contracting a time axis of the measurement acceleration waveform, wherein
• the reference acceleration waveform includes
• a first reference acceleration waveform for each of the plurality of running lanes corresponding to the first acceleration sensor, and
• a second reference acceleration waveform for each of the plurality of running lanes corresponding to the second acceleration sensor;
• identifying a running lane of the plurality of running lanes in which the vehicle runs by comparing a correlation coefficient between (i) a non-linear expansion and contraction measurement acceleration waveform corresponding to the first reference acceleration waveform by nonlinearly expanding and contracting a time axis of the first measurement acceleration waveform, and (ii) a corresponding first reference acceleration waveform, for each of the plurality of running lanes;
• and
• upon the running lane being identified, monitoring the acceleration value based on the second measurement acceleration waveform.