Vorrichtung zur Messung des Reflexionsvermögens und Verfahren zur Messung des Reflexionsvermögens dafür

Details

Veröffentlichungs-Nr.

EP4261505

Aktenzeichen

EP22168621

Anmeldetag

14. April 2022

Veröffentlichung

30. Oktober 2024

Erteilung

30. Oktober 2024

Rechtsraum

EP

IPC

G01J1/44F24C7/08G01J5/70G01J5/80

Abstract

In a heating appliance (100) comprising a substrate (102) for receiving an item of cookware (120), a method of measuring reflectivity comprises emitting (300) a time-varying electromagnetic signal (108) from a first side of the substrate (102), a portion of the time-varying electromagnetic signal (110) propagating through the substrate (102). Electromagnetic radiation (112, 118) is then received (302) at the first side of the substrate (102), the received electromagnetic radiation (112, 118) comprising a background ambient component received (118) and a component reflected (112) by the substrate (102). A gain factor is applied (304) to translate the received electromagnetic radiation (112, 118) to a receive electrical signal (400). An offset signal component (402) is then identified (312) from the receive electrical signal (400), the offset signal component (402) arising from the background ambient component of the received electromagnetic radiation (118). The gain factor from the offset signal component (402) is then estimated using a characterisation of the offset signal component (402), and the reflectivity is calculated using the receive electrical signal (400) and the estimated gain factor.

Anmelder

Firma

Melexis Technologies NV

Land

🇧🇪 Belgien

Fachgebiete