原理：导波雷达发出的高频微波脉冲沿着探测组件（钢缆或钢棒）传播，遇到被测介质，由于介电常数突变，引起反射，一部分脉冲能量被反射回来。 Guided wave radar level meter principle: The high-frequency microwave pulses emitted by the guided wave radar travel along the detection component (steel cable or steel rod). When encountering the measured medium, the dielectric constant changes, causing reflection, and a part of the pulse energy is reflected. come back. The time interval between the transmitted pulse and the reflected pulse is proportional to the distance of the measured medium. Guided wave radar level gauge can be used to continuously measure the level of liquids and solid powders, granules and liquids, and it is not affected by the density of the liquid, the degree of looseness of the solid material, the temperature, the dust during the feeding, and the foam on the surface of the liquid. .
Technical parameters of guided wave radar level gauge
Working frequency: 100MHZ-1.8GHZ
Measuring range: cable type: 0-30m; rod type, coaxial type: 0-6m
Repeatability: ± 3mm
Sampling: echo sampling 55 times / s
Response speed:> 0.2S (depending on the specific use case)
Output current signal: 4-20mA
Communication interface: HART communication protocol
Process connection: G1-1 / 2
Flange DN50, DN80, DN100, DN150
Process pressure: -1-40bar
Power: 24VDC (± 10%)
Ripple voltage: 1Vpp
Power consumption: max 22.5mA
3. Environmental conditions
Temperature -40 ℃ ～ + 80 ℃
Enclosure protection class: IP68
Explosion-proof grade: EXiaIICT6
Two-wire connection: The instrument power supply and signal output share a two-core shielded cable
Cable entry: 2 M20 × 1.5 (cable diameter 5-9mm)
容器中存在两种不同介质，当上面一层的介质介电常数较小，而下面的介质介电常数较大时，高频微脉冲沿着探测组件传播遇到上层介质时，由于其介电常数较小，因而有极少的能量被这一层介面反射，而大部分能量穿透上层介质继续向下传播，遇到两层的介面时，由于下层介质的介电常数较大，因而会有较大的能量被反射回来。 There are two different media in the guided wave radar level gauge container. When the dielectric constant of the upper layer is small and the dielectric constant of the lower layer is large, high-frequency micropulses travel along the detection component and encounter the upper medium. At this time, due to its small dielectric constant, very little energy is reflected by this layer of interface, and most of the energy penetrates the upper layer of the medium and continues to propagate downward. When encountering the two-layer interface, The larger the constant, the more energy will be reflected back. Therefore, guided wave radar is an interface that can measure two different media. The measurement conditions are that the upper medium is non-conductive or its dielectric constant is lower than the dielectric constant of the lower medium by more than 10.
特点： Guided wave radar level meter features:
Due to the use of advanced microprocessors and unique EchoDiscovery echo processing technology, guided wave radar level gauges can be applied to a variety of complex conditions.
A variety of process connection methods and types of detection components make the GDGW5X series guided wave radar level gauge suitable for a variety of complex conditions and applications. Such as: high temperature, high pressure and small dielectric constant medium.
Using pulse working mode, the guided wave radar level gauge has extremely low transmission power, and can be installed in various metal and non-metal containers without harming human body and the environment.
The guided wave radar level gauge summarized by everyone hopes that it can be helpful to everyone. We also hope that there are many deficiencies.
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