Submerged recovery device and post-submerged recovery method

摘要

PROBLEM TO BE SOLVED: To provide a recovery device after submersion capable of suppressing malfunction or failure of an ultrasonic sensor by suppressing electrode decomposition caused by water wetting at a terminal of a measurement substrate. SOLUTION: Of the power supply terminals 31, 32 and connection terminals 33, 34 of a measuring board 30 connected to ultrasonic sensors 25a, 25b, power is supplied to a path including the connection terminals 33, 34 in a short time. Based on the detection results of the detection unit 12 and the detection unit 12, which detects the impedance that changes depending on the presence or absence of water wetting on the connection terminals 33 and 34 after the power is supplied by the unit 11 and the supply unit 11, the connection terminals 33 and 34 It is provided with a determination unit 13 for determining whether or not the water is wet. [Selection diagram] Fig. 1