WATER QUALITY SENSOR USING POSITIVE FEEDBACK

摘要

A sensing system, according to the present embodiment, comprises: an optical actuator for applying an optical stimulation to a material to be detected; a photo-detector for outputting an electrical signal having a snapback form in correspondence with an optical reaction formed according to the density of the material to be detected to which the optical stimulation has been applied; an amplifier for amplifying the electrical signal outputted from the photo-detector and positively feeding back and applying the amplified electrical signal to the optical actuator; and a detection unit for detecting the material to be detected by receiving the electrical signal.