The process is an important parameter of the production monitoring process of the enterprise, and is an important means to ensure high quality, high efficiency, safety, stable operation and environmental improvement. The measurement of airflow is of great significance to the industries of chemical industry, environmental protection and energy. It can strengthen material management, improve energy management, material transfer, trade settlement economic analysis and accounting and benefit evaluation. In a sense, the measurement of traffic is the eye of the enterprise, and it is also a measure of efficiency. Modern enterprises are increasingly demanding the measurement of shedding flow. Gas measuring instruments such as vortex flowmeters are commonly used for industrial measurement of differential pressure flowmeters. The vortex flowmeter has a simple and firm structure and is suitable for a variety of fluids. It has high measurement accuracy, wide range and low pressure loss. With all of these features, it is widely used. This paper is based on the analysis of some of the reasons that may easily affect the accuracy of gas measurement data and the improvement of vortex flowmeters, thereby improving the further accuracy of gas flow measurement.
The vortex flowmeter places a vortex-type vortex in the fluid. The fluid in the vortex generating body alternately releases a regular and alternating range of flow vortices on both sides of the separation of the two columns. In some vortex ranges (Reynolds numbers), the separation frequency and volume flow are proportional to the fluid flowing through the vortex of the vortex transmitter.
Due to the structural characteristics and measurement principle of the vortex flowmeter, the measurement accuracy of the vortex flowmeter will be affected by vibration, pulse interference, measuring medium, installation method, fluid condition and other factors.
The vortex flowmeter is basically a fluid oscillating flowmeter. In addition to piezoelectric detection vortex flowmeters, vortex flowmeters are particularly sensitive to other mechanical vibrations. Since the output pulse of the vortex flowmeter is proportional to the flow rate, the detected vortex lift and velocity squared are proportional to the measured fluid density, so the transmitter signal frequency is low and small amplitude in the small flow, eddy current. If the pipeline vibration seriously affects the low frequency interference, the output pulse error will be larger; as the flow rate increases, the vortex flowmeter signal frequency will increase, and the pipeline low frequency vibration interference effect will increase. When the output pulse is weakened, the error becomes small.