US 12,326,356 B2
Vehicle weight estimation apparatus, vehicle weight estimation method, and computer readable recording medium
Shohei Kinoshita, Tokyo (JP); Murtuza Petladwala, Tokyo (JP); Shigeru Kasai, Tokyo (JP); and Eisuke Saneyoshi, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Appl. No. 17/637,604
Filed by NEC CORPORATION, Tokyo (JP)
PCT Filed Nov. 20, 2019, PCT No. PCT/JP2019/045499
§ 371(c)(1), (2) Date Feb. 23, 2022,
PCT Pub. No. WO2021/100159, PCT Pub. Date May 27, 2021.
Prior Publication US 2022/0283015 A1, Sep. 8, 2022
Int. Cl. G01G 19/03 (2006.01); G01G 19/02 (2006.01)
CPC G01G 19/03 (2013.01) [G01G 19/022 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A vehicle weight estimation apparatus comprising:
a memory storing one or more instructions; and
a processor configured to execute the one or more instructions to:
when the vehicle passes through a vibration-generating structure that is a bump/dent structure that obtains a preset vibration, collect vibration information indicating vibration output from a sensor installed in a structure having the vibration-generating structure;
by using the vibration information, detect axle responses indicating vibration generated in the structure for each axle when the vehicle passes over the vibration-generating structure;
calculate axle indices corresponding to individual axles based on the axle responses for each axle;
convert the axle indices into axle weights by referring to conversion information that is stored in advance and that indicates a relationship between the axle indices and the axle weights;
calculate the weight of the vehicle by totaling the axle weights of the individual axles; and
extract response start times, response end times, and window widths of the axle responses,
wherein each axle response of the axle responses includes acceleration data, and
wherein a square root of sum of squares of acceleration in the axle response, the maximum amplitude value in the acceleration data in the axle response, or the maximum value among spectral amplitudes obtained through frequency conversion of the acceleration data in the axle response is adopted as an axle index.