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 Wysłany: Pią 4:55, 10 Gru 2010 Temat postu: ugg prezzo The principle of radar level meter and |
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The principle of radar level meter and its application
Sensor to be tilted a certain angle. (2) measuring tape to avoid causing false launch angle reflection within the device. In particular, avoid the latest from the antenna 1 / 3 of the conical emission area hinder the device (because the closer the obstruction device, false reflecting the stronger the signal.) If it is unavoidable, the proposed board will pass with a refraction of the strong refraction of the reflected signal to go false. This can reduce the energy density of false echoes, so that the sensor will be easier to filter out false signals. (3) To avoid the feed opening to avoid a false reflection. (4) Do not install the sensor at the center of the tank in the arch (otherwise false 57 * Sensor received echo will increase), from the tank wall can not be installed close to the optimum installation location in the container radius of 1 / 2 . (5) to avoid strong eddy installed in place. Such as: the mixing or a strong chemical reaction,[link widoczny dla zalogowanych], recommended, or bypass tube waveguide measurements. (6) If the sensor installed in the receiver, the antenna must be sticking out from the over, Bell took over at least the antenna out of 10ram. Over the maximum length of rod antenna lOOmrn or 250mm. Over the minimum diameter of 250mm. Diameter can be taken to increase over ways to reduce the interference generated over echo. (7) on the waveguide antenna: guided wave tube wall must be smooth, the following waveguide openings must meet the minimum required level, so as to measure in the pipeline. The sensor plate to align the axis of waveguide openings. If the measured dielectric constant of less than 4, to be installed in the waveguide end of the reflector, or the bent end of a waveguide bend,[link widoczny dla zalogowanych], to echo the end of refraction of the container away. Third, the application problems and solutions used by some condition of radar level meter, because the improper installation location and conditions of the sensor caused some problems, some of the use of the following issues will be a solution for reference. 1. Scarring and frequent failure of the probe solution to the probe mounting location can be improved, but sometimes by the installation conditions, can not improve the situation, it should be measured by the material position of the pump interlock with the slot means to solve: the Level setting the highest decrease of about 0.5mm, when the material level reaches the highest value, you can stop feeding pump or open the feed pump. 2. Radar level meter flooded corresponding improvement solutions to this problem is guided radar level meter to measure the wave tube,[link widoczny dla zalogowanych], is still the original installation of waveguide openings radar level meter, above the waveguide exhaust pipe of about 0.2m, so that, even if there is exhaust pipe slurry overflow from the harsh working conditions,[link widoczny dla zalogowanych], level meter antenna would not be flooded slurry,[link widoczny dla zalogowanych], and avoid the interference of vortex mixer and a large quantity of steam emerge from the probe at reducing the damage of the probe, while focusing the waveguide effect, the received radar signal is stronger, get a good measurement results. Measurement using the waveguide, can improve the measurement conditions, to improve the performance measurement instrument with high application value. 3. On the foam bubbles on the measurement of dry and wet foam can bounce radar, had no effect on the measurement; neutral foam will absorb and diffuse radar and seriously affect the reflection or no echo echo. When the media surface for the thick, thick foam, the measurement error larger or can not be measured, in such conditions, the radar level gauge does not have the advantage, which is its limitation of application. 4. For the treatment of scarring antenna hung a small dielectric constant material in the dry state had no effect on the measurement, and high dielectric constant material is linked to an impact on the measurement. Available compressed air purge (or wash), and compressed air cooling flanges and electrical components to reduce the temperature. Can also be cleaned with acid cleaning fluid alkaline scarring, but can not be in the cleaning level measurement during the IV Conclusion radar level gauge is the level measurement instrument in all kinds of widest application, measurement accuracy and easy maintenance level measurement instrument. With further reduce its price, cost-effective improvement, the application will be more extensive in the level measurement play an increasingly important role. This paper describes its system, for the majority of maintenance personnel to better use and control it, hoping to learn from and help to provide some intelligent flow totalizer parameter error analysis of a, of the problem with Wang Yi ( measurement tests, Zibo City, Zibo 255003) Intelligent Flow Totalizer is widely used in a variety of liquids, gases and steam flow measurement, integrating and control. Work in the application should be based on 58 parameters and instrumentation configuration * Arts, the right to set various parameters. Intelligent Flow Totalizer in the testing and calibration work, many find that measurement error increases exponentially. Search The reason is that intelligent flow totalizer parameter setting error. Setting Error: salt banana to QQ: in
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