7
2.2
Measuring Principle
This series of ultrasonic flowmeter is an industrial time-difference type ultrasonic flowmeter.
It applies the latest industrial-level PFGA, which extremely improves the signal sampling frequency
and bubble tolerance rate; the self-developed TGA technology makes it be capable of dealing with
more complex logic and calculation to provide more accurate and faster measurements, and
ensures the flowmeter could endure non-continuous bubbles or impurities within 5 sec. In
addition, it could be installed and operated in a convenient way with no need to break the pipe or
cut off the fluid or stop work.
Time-difference type ultrasonic measurement indicates determining the fluid flow along the
average velocity with the time difference between two ultrasonic signals transmitting downstream
or upstream in the same stroke.
In which
：
v
Flow Velocity
M
Ultrasonic reflections
D
Pipe diameter
θ
Included angle between ultrasound signal
and fluid
Tup
Time that downstream transducer sends
signal to upstream
Tdown
Time that upstream transducer sends signal
to downstream
△
T =Tup-Tdown
2.3
Application Scope
It mainly applies for measuring the flow of homogeneous medium fluid in the following fields:
Domestic wastewater flow measurement, crude oil flow measurement, cementing slurry flow
measurement, oily sewage flow measurement in oil fields, water injection flow measurement
in oil wells, raw water flow measurement in rivers and reservoirs, tap water flow
measurement, process flow measurement of petrochemical products, industrial circulating
water flow measurement, water consumption measurement in production, mineral slurry
flow measurement, pulp flow measurement, chemical flow measurement, circulated cooling
water flow measurement, generating coil cooling water flow measurement (super small
diameter), juice flow measurement, milk flow measurement, and so on.
Downstream Transducer
Upstream
Transducer
