Ultrasound sensor for a fumes extractor hood
US6324889A · kind A · utility
8Cited by
3References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 11, 1999 |
| Grant date | Dec 4, 2001 |
| Priority date | — |
| Expiry date | Nov 11, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24C15/2021
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Provided is to an ultrasound sensor for a fumes extractor hood, wherein the sensor monitors the vapor rising from the cooking to the extractor hood. Automatic compensation in respect of temperature and ageing drift of the sensor is effected. For that purpose checking of the resonance frequency is implemented cyclically during on-going operation of the sensor, in which case a shift in the resonance frequency is recognized, and the new resonance frequency is established by a statistical calculation method and used for further operation of the sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.