Patent ID: 6332360
Filing Date: 2001-12-25
Classification: G01F,G01K,G01N,G01P

Abstract:
An apparatus for measuring the depth of water or the water temperature at any point of an open channel by measuring an ultrasonic propagation time transmitted between a plural number of ultrasonic transducers and by a calculation using an ultrasonic velocity to obtain an accurate average ultrasonic velocity in a vertical direction,wherein a slider is attached to a support capable of moving up and down, said support being place in water,a first ultrasonic transducer is fixed to the bottom of the support,a second ultrasonic transducer is positioned above the first ultrasonic transducer,a third ultrasonic transducer is positioned above the second ultrasonic transducer and below the slider,and, a fourth ultrasonic transducer is fixed to the slider,each transducer faces with each other.