测量液化气主要有两种方式。 There are two main ways to measure liquefied gas with current radar level gauges . One is to use a bypass tube and use a low-frequency radar (SitransLR200) for measurement. Because this method has very high requirements for the production of the bypass pipe, it is easy to cause poor results due to the unsatisfactory quality of the bypass pipe; even in some large-scale spherical tank applications, because the bypass pipe is too long, Distortion can easily occur, making it impossible for radar level gauges to measure. There are few successful cases of using LR200 to measure liquefied gas on a bypass or waveguide. Another type adopts high frequency radar's good emission characteristics for low dielectric constant medium. Direct measurement of liquefied gas liquid level SitransLR400 can directly measure dielectrics with a dielectric constant as low as 1.5, which can meet the measurement of liquefied gas. The installation position can be selected on the top of the spherical tank, and a hole is directly opened on the top of the spherical tank. In order to ensure the convenience of maintenance, it is generally necessary to install the LR400 on a mounting riser with a ball valve (DN> 150 is recommended) for easy removal at any time Down for maintenance; or install on a thicker bypass pipe (6 ~ 10 ”diameter or more).
，我们已经使伺服技术的性能、精确性和可靠性达到完美，我们看到了雷达测量的更大潜力。我们正在开发新型软件以用来增加设备的可靠性，这也将扩大其在更种场合中的应用范围。我们的目标是达到液位测量可以将储罐容量得到最优的应用，”雷达液位计说，“即使在将来，对于雷达技术，我们不会再看到'万能型'装置，应用过程，换句话说，就是机械与物理环境将决定哪种测量方法最好。” "Although at radar level gauges we have perfected the performance, accuracy and reliability of servo technology, we see greater potential for radar measurements. We are developing new software to increase the reliability of the equipment, which also It will expand its application range in more occasions. Our goal is to achieve the optimal application of tank capacity for liquid level measurement, "said the radar level gauge." Even in the future, for radar technology, we will not Then look at the 'universal' device, the application process, in other words, the mechanical and physical environment will determine which measurement method is best. "
注意事项:测量范围从波束触及罐低的那一点开始计算，但在特殊情况下，若罐底为凹型或锥形，当物位低于此点时无法进行测量。 Note for radar level gauges : The measurement range is calculated from the point where the beam touches the tank low, but in special cases, if the tank bottom is concave or tapered, the measurement cannot be performed when the level is below this point. If the medium has a low dielectric constant, when it is at a low liquid level, the bottom of the tank is visible. At this time, in order to ensure the measurement accuracy, it is recommended to set the zero point at a low height of C. It is theoretically possible to measure the position of the antenna tip, but considering the effects of corrosion and adhesion, the final value of the measurement range should be at least 100 mm from the antenna tip. For overflow protection, a safety distance can be defined to be attached to the dead zone. The minimum measurement range is related to the antenna. Depending on the concentration, the foam can both absorb microwaves and reflect them, but it can be measured under certain conditions.