Â Â Â Â Radar Level Meter Signal Processing Factors:
Â Â Â Â 1. The application of radar level gauges is often a confined, narrow space rather than an open, large space. The signal emitted by the radar level gauge is an electromagnetic wave. The electromagnetic wave diverges in space and has all the characteristics of electromagnetic waves, such as reflection, diffraction and refraction. Any object in the propagation space will produce signal reflections. The narrow space will produce a lot of reflected signals, including the direct reflection signal on the surface of the object, as well as the back and forth reflection and oscillation of the signal (multiple reflection between the surfaces).
Â Â Â Â 2. When the height of the liquid surface is different, the shape of the measuring space is constantly changing, and the reflection and vibration of the signal are also different. Especially when the measured space has a curved surface, such as a dome tank, a spherical vessel or a horizontal elliptical tank, since the curved surface has a focusing effect on the electromagnetic wave, the height change of the liquid level has a greater influence on the reflection.
Â Â Â Â 3. After the radar level gauges are installed and put into use, the surface conditions of the applications are constantly changing. Taking a reaction tank as an example, the media to be measured in a chemical process are various, and there will be changes in the liquid surface during feeding, such as material adhesion, changes in the physical or chemical characteristics of the surface of the tank, etc. These changes will inevitably affect the reflection. The strength of the signal.
Â Â Â Â 4, some application site media will directly affect the launch and reception of radar waves. On the one hand, it shows the effect on the antenna. If steam condenses on the surface of the antenna, the material crystallizes on the surface of the antenna. On the other hand, the volatilization or atomization of the medium in the tank can also affect the propagation of radar waves, which in turn affects the measurement.
Â Â Â Â 5, the measurement of the liquid surface also has a variety of changes, such as when the mirror is static; surface level fluctuations will occur when the change; sometimes there may be the presence of foam. In different situations, multiple reflections of the signal change.
Â Â Â Â Huajiang Automation can provide you with professional radar level meter selection suggestions and reliable radar level meter products. Any questions can be caused. We will have professional technical personnel to help you answer and hope to bring you help!
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