Method for estimating the amount of laundry loaded in a rotating drum of a laundry washing machine
US10619286B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 2016 |
| Grant date | Apr 14, 2020 |
| Priority date | — |
| Expiry date | Dec 29, 2036 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06F2105/48
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A method to control a laundry machine. The method includes: controlling an electric motor to rotate a drum to change the rotational speed according to a prefixed reference speed profile comprising an acceleration ramp from a low speed to a prefixed high speed and a constant speed phase at the high speed, sampling first torque values generated by the motor during the acceleration ramp according to a first sample time, sampling second torque values generated by the motor during the constant speed phase according to a second sample time, calculating a third value indicative of an average torque being calculated on the basis of the second torque values, determining a fourth value by performing an integral function with respect to the first torque values less the third value, and determining the amount of laundry load on the basis of the fourth value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.