Horn shaped radar water level gauge radar level gauge manufacturer Click to view details

Description :

　　Measurement method of radar water level gauge

　　It is a radar level gauge based on the Time Domain Reflectance (TDR) principle. Some pulses of the radar level gauge are reflected to form echoes and return along the same path. However, considering the effects of corrosion and adhesion, the final value of the measurement range should be at least 100mm away from the antenna. For overflow protection, a safe distance of the radar level gauge can be defined to be added to the blind spot. The small measurement range is related to the antenna. With different concentrations, foam can both absorb microwave and reflect it, but it can be measured under certain conditions. Return to the pulse transmission device.

　　Distance measurement principle of radar level gauge

　　The radar level gauge emits modulated electromagnetic waves to the liquid surface, and the reflected echo signal from the liquid surface is received by the radar and mixed with the transmitted signal. The frequency of the resulting difference frequency signal is proportional to the distance from the liquid surface. A high-precision signal processing algorithm combining Zoom FFT and energy center of gravity correction algorithm is proposed for the application of millimeter wave radar level gauges. Zoom FFT is used for spectral refinement with a small refinement factor, and the energy center of gravity correction algorithm is used to accurately estimate the frequency of the difference frequency signal. This algorithm eliminates the influence of FFT fence effect on ranging accuracy, and the computational complexity and storage space are relatively reasonable The simulation results show that when the signal-to-noise ratio of the difference frequency signal is 12dB, the algorithm controls the root mean square error of the distance measurement to the millimeter level.

　　Advantages and Applications of Radar Water Level Gauge

　　1. Radar level gauges can measure liquid and solid media such as slurries, raw coal, pulverized coal, volatile liquids, etc;

　　2. It can measure all media with a constant greater than 1.2 in vacuum, with a measurement range of up to 70m;

　　3. The power supply and output signal are transmitted through a two core cable (loop circuit), using 4-20mA output or digital signal output;

　　4. Non contact measurement installation is convenient and uses extremely stable materials that are sturdy and durable, with a reliable resolution of up to 1mm;

　　5. Not affected by working conditions such as noise, steam, dust, vacuum, etc;

　　6. Not affected by changes in medium density and temperature, the process pressure can reach 400 bar, and the medium temperature can reach -200 ℃ to 800 ℃;

　　7. There are multiple installation methods to choose from: top installation, side installation, bypass pipe installation, waveguide pipe installation;

　　8. Debugging can be done in multiple ways: using programming modules for debugging (equivalent to an analytical processing instrument), SOFT software debugging, and HART handheld programmer debugging, making debugging convenient and fast.

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• Horn shaped radar water level gauge