Patent ID: 9170020
Filing Date: 2015-10-27
Classification: F23N

Abstract:
1. A monitoring device to independently monitor a first flame and a second flame in a fuel combustion device, comprising: a first flame detector, configured and arranged to receive a first batch of radiation, which is emitted by the first flame; a second flame detector, configured and arranged to receive a second batch of radiation, which is emitted by the second flame; a voltage supply device that is connected to the first and second flame detectors and is configured to apply an alternating voltage with a first half wave and a second half wave to the first and second flame detectors; and an evaluation circuit connected to the first and second flame detectors via a common signal input, wherein the first and second flame detectors are configured in such way that: wherein the evaluation circuit is configured to evaluate the first measurement signal and the second measurement signal independently of one another.