The use of microwave radar liquid level gauge
Microwave liquid level meter, also called radar level gauge, developing rapidly in recent years a new type of liquid level meter, adopts the principle of electromagnetic wave, possesses the advantages of many other level gauge does not have. This paper according to the industrial level measurement use microwave radar level gauge the note.
Level measurement is an important parameter in various industrial processes. Many level measurement method, such as differential pressure type, magnetic buoyancy type, tilting, magneto telescopic, radio frequency capacitance type, ultrasonic type, etc. Is usually a physical parameters with bai medium (such as dielectric constant, acoustic velocity, density, etc.), the corresponding level changes lead to the change of some parameters to measure liquid level. Domestic so level measurement is closely related to the characteristics of the measured medium and technology environment. No kind of measuring principle of meter has its specific application areas. So liquid level instrument selection must understand the principle and characteristics of the instrument itself, select the appropriate applications, can get good effect. In recent years the development of microwave radar level gauge soon, manufacturers, specifications, variety many, so I auger various types of microwave radar level gauge is very important.
Radar level gauge is through the antenna to level the fahua temple microwave measured medium, and then back to measure microwave emission and reflection time and container liquid level instrument. Because of radar level gauge has adopted advanced echo processing and data processing technology, combined with good high frequency penetration characteristics of radar wave itself, therefore, radar level gauge than contact material level meter and the same kind of non-contact material level meter has the characteristics of better.
In the security Settings interface can be set according to the production parameters such as alarm output. Because of the storage tank agitator and tube wall are likely to produce echo, in order not to affect the accuracy of measurement, so we must choose clutter echo suppression. Namely will measure distance comparing with real distance. Distance is too big or too small to bring the interference error cannot be eliminated by inhibiting figure, only when the detection distance on choosing, echo suppression for the current measurement, suppress range by the technical staff need to calculate according to the scene.
Note for the application of microwave radar level meter:
(1) : bubble to measure the impact of general dry foam and wet the radar wave can be reflected, for measuring no effect; Neutral foam will absorb and diffuse radar wave, thus seriously affect echo reflection and even no echo.
(2) antenna scar treatment: dielectric constant small hanging in the dry state has no influence on measurement, while hanging high dielectric constant have influence on measurement. Available compressed air purging or clean water to rinse, and compressed air cooling can reduce the temperature of flange and electrical components.
(3) radar level gauge product development is very simple, if only requires stable and reliable work, and do not require high precision, is to give accurate tank after high value and a liquid level value, casually operators using quadratic form buttons, a few minutes to complete the empty high and the upper and lower limit alarm value set work, calibration is complete. If you want accurate measurement, is are high, medium and low three level value. Liquid level is higher in the by-pass pipe and tube, can be done by switching valve and drain valve.
Microwave radar level gauge displacement, transmission parts, non-contact measurement, not affected by temperature, pressure, steam, aerosol and the limitation of dust, apply to the viscosity of the medium, toxic or non-toxic health type medium, corrosive medium level measurement, can be used as industrial measurement in better instrumentation.