US 11,835,379 B2
Method and system for shipping container loading and unloading estimation
Shouxing Qu, Gloucester (CA); Gaëlle Christine Martin-Cocher, Toronto (CA); Suresh Periyalwar, Toronto (CA); Yu Gao, Waterloo (CA); and Sameh Ayoub, Ottawa (CA)
Assigned to BlackBerry Limited, Waterloo (CA)
Filed by BlackBerry Limited, Waterloo (CA)
Filed on Apr. 19, 2022, as Appl. No. 17/724,192.
Application 17/724,192 is a continuation of application No. 16/664,387, filed on Oct. 25, 2019, granted, now 11,333,547.
Prior Publication US 2022/0244095 A1, Aug. 4, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G01H 1/00 (2006.01); G06N 20/00 (2019.01)
CPC G01H 1/00 (2013.01) [G06N 20/00 (2019.01)] 17 Claims
OG exemplary drawing
 
1. A method at a computing device, the method comprising:
receiving, at the computing device, sensor data for a vehicle providing vibration frequency and magnitude for a plurality of tests, along with a loading status for the sensor data for each of the plurality of tests;
calculating an energy (EL) for a low frequency passband and calculating an energy (EH) for a high frequency passband of a bandpass filter pair for each of the plurality of tests;
finding an energy ratio based on the energy for the low frequency passband and the energy for the high frequency passband for each of the plurality of tests, wherein the energy ratio (eRatio) comprises:

OG Complex Work Unit Math
deriving weighting constants for a type of chassis of a vehicle; and
sending the weighting constants to a sensor apparatus at the vehicle for finding whether the vehicle is loaded or unloaded.