METHOD FOR IDENTIFICATION OF DIFFERENT STATES OF WATER, AND SENSOR ARRANGEMENT FOR USE IN THE METHOD

摘要

The invention relates to a sensor arrangement for identification of different states of water on the surface of a structure (1). The sensor arrangement (2) comprises at least one longitudinal sensor element (2) manufactured of a material conveying acoustic oscillation and a transmitter-receiver unit (3) coupled at the ends of the sensor element (2) for transmitting acoustic oscillation, preferably oscillation in the ultrasonic range, to the sensor element (2) and for receiving the response of the transmitted oscillation. The transmitter-receiver unit (3) is arranged to transmit oscillation and to receive the response of the transmitted oscillation from both ends (6, 7) of the sensor element (2). The invention relates also to a method in the sensor arrangement.