VALVE DIAGNOSIS APPARATUS, VALVE APPARATUS, AND VALVE DIAGNOSIS METHOD

摘要

The present disclosure provides a valve diagnosis apparatus capable of being combined with an existing valve and of automatically diagnosing corrosion, a valve apparatus using this valve diagnosis apparatus, and a valve diagnosis method. A valve diagnosis apparatus of the present disclosure includes an ultrasonic transmitter that transmits ultrasound towards a valve element that opens and closes a valve to be diagnosed, an ultrasonic receiver that receives the ultrasound transmitted from the ultrasonic transmitter, a controller that drives the ultrasonic transmitter and processes a reception signal received by the ultrasonic receiver, and a memory that stores the reception signal. The controller detects corrosion of the valve element from the difference in intensity of the reception signal in the initial state of the valve and at the time of diagnosis.