FLOW METER DEVICE AND FLOW RATE CALCULATION METHOD THEREOF

摘要

A flow meter device includes: a first vibrator, a second vibrator, a control unit, a timekeeper, and an arithmetic operation unit. The arithmetic operation unit is configured to: determine whether or not a time difference between a propagation time in the forward direction and a propagation time in the reverse direction is less than a predetermined value; calculate a propagation time correction amount based on the time difference if it is determined that the time difference is less than the predetermined value; and calculate a flow rate of the fluid by using the propagation time correction amount.

主权项

1. A flow meter device for measuring a flow rate of a fluid passing through a conduit, the flow meter device comprising:
a first vibrator and a second vibrator, each of which is provided on the conduit and configured to transmit and receive an ultrasonic signal; a control unit configured to intermittently switch transmitting and receiving vibrators of the ultrasonic signal between the first vibrator and the second vibrator; a timekeeper configured to measure a propagation time of the ultrasonic signal in a forward direction from the first vibrator to the second vibrator, and measure a propagation time of the ultrasonic signal in a reverse direction from the second vibrator to the first vibrator; and an arithmetic operation unit configured to calculate the flow rate of the fluid based on the propagation times of the ultrasonic signal, wherein the arithmetic operation unit is configured to:
determine whether or not a time difference between the propagation time in the forward direction and the propagation time in the reverse direction is less than a predetermined value;calculate a propagation time correction amount based on the time difference if it is determined that the time difference is less than the predetermined value; andcalculate the flow rate of the fluid by using the propagation time correction amount.