The accuracy of the radar level meter depends on whether the selection is correct, the installation is accurate, and the installation position is appropriate, but more often than not, it also depends on the quality of the return wave. The better the quality of the echo, the more accurate the measurement, and conversely, the more inaccurate or impossible the measurement.
How can I improve the quality of the return wave? To solve this problem, we must first understand clearly what is the impact of the radar level meter echo quality factors.
When electromagnetic waves propagate in space, the stability of the propagation medium has no effect on them, but the dielectric constant of the propagation medium will affect the quality of the return wave.
For example, if the air contains graphite or titanium alloy and other high dielectric dust or powder, microwaves in the process of propagation will cause a large or small attenuation, and attenuation will be small, resulting in poor echo quality, attenuation will be large, resulting in no echo signal. So be sure to pay attention to the dielectric constant of the propagation medium.
The dielectric constant of the transmission medium affects the return quality of the radar level meter, as does the surface condition of the medium being measured. As a rule, the calmer the surface of the liquid medium being measured, the better the return signal and the higher the quality.
In fact, in addition to the surface condition of the medium, the dielectric constant of the medium also has an influence on the quality of the return. However, usually, the radar level meter measured liquid medium, and dielectric constant is relatively high, so this is good to know.
Understanding the several factors that affect the quality of the radar level meter echo, we know how to improve the quality of the echo.
Firstly, we need to clean the dirt from the antenna regularly. Dirt can affect the emission of radar waves, and naturally, the quality of the return wave will also be affected, so this is something that needs to be taken care of.
Secondly, for highly fluctuating liquid interfaces or the presence of substances in the air that affect the attenuation of radar waves, if necessary, a bypass tube or waveguide can be selected for installation so that microwaves can be brought together to reduce attenuation and improve the quality of the return wave.
The impact of the quality of the return wave on the radar level meter cannot be said to be great, but it is not small either, so when problems arise in measurement, it is necessary to check if any substance has affected the return wave signal.