Ultrasonic flowmeter measurement principle and advantages
ultrasonic flowmeter is by measuring the fluid flow on ultrasound beam ( Or ultrasonic pulse) To measure the effect of flow meter. According to the signal detection, the principle of ultrasonic flowmeter can be divided into velocity difference method ( Direct time difference method, the time difference method, phase and frequency difference method) , beam deflection method and doppler method, cross correlation method, the spatial filter method and noise method, etc. And electromagnetic flowmeter, ultrasonic flowmeter for instrument circulation channel is not set any impediments, unimpeded flow meter, is suitable for solving the problem of flow measurement difficulty of flow meter, especially in the big flow measurement has the outstanding advantages, in recent years, it is one of the rapid development of flowmeter. Ultrasonic flowmeter advantages: ( 1) As a non-contact measurement; ( 2) For no flow block measurement, no pressure loss; ( 3) To measuring the conductivity of liquid, no block measuring electromagnetic flowmeter is a kind of supplement.
However, with the increased prevalence of mass flow meter, it has become far more affordable.
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