超声波流量计的工作原理是什么

简述DANIEL超声波流量计的工作原理。

超声波流量计的工作原理分为( )、多普勒法、波速偏移法.

A.传播速度差法

B.传播速度时差法

C.传播速度相差法

D.传播速度频差法

A. 喷管式流量计

B. 压差式流量计

C. 超声波流量计

A. 声道

B. 连接

C. 声脉冲

D. 时间差

两个能发射和接收声脉冲的探头。采用超声检测技术，通过测量超声波沿气流顺向和逆向传播的声速差、压力和温度，算出气体流速及标准状态下气体的流量。Two probes capable of transmitting and receiving acoustic pulses are positioned on one or both sides of the pipe. Ultrasonic detection technology is adopted to calculate the gas velocity and flow rate under standard state by measuring the sound velocity difference, pressure and temperature of ultrasonic wave propagating along the flow direction and backward.