Patent ID: 11946810
Assignee: JONDETECH SENSORS AB (PUBL)
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 7:
8. The method according to claim 1 where the following process is carried out at start-up:
i) determining an initial IR signal during an initiation time period and calculating an initial signal baseline for the initial IR signal, then
ii) using the initial IR signal baseline and the calculated variability of the initial IR signal during the initiation time period to determine an upper start-up threshold and a lower start-up threshold, then
iii) receiving further IR sensor data during a later time period and
1. Determining that the further IR sensor data is above the upper start-up threshold and then using the initial signal baseline as the IR background signal baseline in step b),
or
2. determining that the further IR sensor data is below the lower start up threshold and then determining a new IR signal baseline level and using that baseline as the IR background signal baseline in step b).