Patent ID: 9638557
Date: 2017-05-02
CPC Classifications: G01F

Claim:
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: