ULTRASONIC FLOW RATE MEASUREMENT DEVICE

摘要

There is provided an ultrasonic flow rate measurement device capable of sensing a temperature and correcting the temperature without use of a sensor specifically designed for measuring a temperature, such as a thermistor. The ultrasonic flow rate measurement device includes a first ultrasonic transducer 12 and a second ultrasonic transducer 13 that re disposed in a flow volume measurement block 11 and arranged in such a way that ultrasonic waves are transmitted from one transducer and received by the other transducer; a counter 17 for measuring a propagation time consumed for exchanging the ultrasonic waves between the first ultrasonic transducer 12 and the second ultrasonic transducers 13; a flow volume computing block 19 that calculates a flow volume from a measurement value of the counter 17; an oscillation circuit 16 used as a time counter when the counter 17 calculates the propagation time; and a temperature sensing block 20 for sensing a temperature by utilization of a frequency change attributable to a temperature of the oscillation circuit 16.