公开(公告)号：US20240019368A1

公开(公告)日：2024-01-18

申请号：US18251471

申请日：2021-11-03

Applicant: Insplorion Sensor Systems AB

Inventor： Per Klockar

IPC: G01N21/552

CPC classification number: G01N21/554 ,  G01N2201/06106 ,  G01N2201/06153

Abstract: The present invention relates to a method and device for determining a property of an ambient environment. The device comprises a plasmonic sensing element; a first light source for illuminating a first and a second light sensor, the first sensor via the plasmonic sensing element; a second light source for illuminating the light sensors; circuitry for executing: a control function controlling light sources, a function receiving a measurement from the first sensor, and a first signal from the second sensor, a function receiving a reference from the first sensor, and a second signal from the second sensor, a function determining the property by comparing the measurement and reference signals, and the control function further controlling light sources such that a relation of intensities of light emitted by the light sources is constant over time.