A brief introduction to the section type flowmeter

The application of coriolis flowmeter, coriolis mass flowmeter, was developed by the founder of MicroMotion company in the United States according to this principle, the world's first practical mass flowmeter.

When fluid flows in a rotating tube, it exerts a force on the wall. It was discovered by coriolis in 1832 when he studied turbines.In 1977, the founder of MicroMotion developed the world's first practical mass flowmeter based on this principle.Mass flow meter based on coriolis force, inside the sensor has two parallel flow pipe, is equipped with central drive coil, at both ends is equipped with detecting coil, transmitter provides the excitation voltage to the drive coil, vibration tube for reciprocating cycle, the vibration of the industrial process of fluid flowing through the sensor, will be produced in the vibration tube coriolis force effect, make the two root vibration control torsional vibration, installed in a vibration at the ends of the pipe line will produce phase difference of two groups of signals, the two signals of phase and is proportional to the mass flow rate of fluid flowing through the sensor.The computer calculates the mass flow through the vibrating tube.When different media flow through the sensor, the main frequency of the vibration tube is different.The platinum resistance mounted on the vibration tube of the sensor can indirectly measure the temperature of the medium.

Mass flowmeter directly measures the mass flow rate of the medium passing through the flowmeter, and can also measure the density of the medium and indirectly measure the temperature of the medium.Because the transmitter is an intelligent instrument with single chip microcomputer as the core, more than ten kinds of parameters can be derived according to the above three basic quantities for users to use.Mass flowmeter is a new generation flowmeter with flexible configuration, powerful function, high performance and price ratio.A flow meter for measuring mass flow in a pipe.When the measured flow body is under the condition that the parameters such as pressure and temperature change a lot, if only the volume flow rate is measured, the measurement error will be great because of the change of fluid density.In volumetric and differential pressure flowmeters, the density of the measured flow may vary by 30 percent, resulting in a flow rate error of 30 to 40 percent.

With the improvement of automation, many production processes have put forward new requirements on flow measurement.The chemical reaction process is controlled by the mass, not the volume, of the material.The heating and cooling effects of steam and air flow are also proportional to the mass flow.Strict product quality control, accurate cost accounting, aircraft and missile fuel volume control, also need accurate mass flow measurement.So mass flowmeter is an important flowmeter.