⎝⎛星力捕鱼⎞⎠

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Industry Information
Radar level gauge microwave pulses are transmitted and received through the antenna system
2012-2-29 9:46:23

At present, China's instrumentation industry adheres to a series of measures such as independent innovation and adjustment of product structure, which has made China's instrumentation and instrumentation industry develop rapidly. After years of exploration, domestic enterprises have concluded their own sets of Production and sales as one industrial structure. Some high-tech products such as radar level gauges, ultrasonic liquid (level) level gauges, calibration simulators, paperless recorders, intelligent RF admittance level meters, etc. have achieved good results. The following introduces the radar level gauge;
的工作原理是发射能量很低的极短的微波脉冲通过天线系统发射并接收。 The working principle of the radar level gauge is to transmit and receive very short microwave pulses with very low energy through the antenna system. Radar waves travel at the speed of light. The running time can be converted into a level signal by electronic components. A special time extension method ensures stable and accurate measurements in a very short time. Even if the working conditions are more complicated, there are false echoes. The latest micro-processing technology and debugging software can accurately analyze the level echoes. The input antenna receives the reflected microwave pulse and transmits it to the electronic circuit. The microprocessor first processes this signal, and then it can identify the echo generated by the micropulse on the surface of the material. The correct echo signal recognition is completed by intelligent software, and the accuracy can reach millimeter level.
适用于对液体、浆料及颗粒料的物位进行非接触式连续测量,适用于温度、压力变化大;有惰性气体及挥发存在的场合。 The intelligent radar level gauge is suitable for non-contact continuous measurement of the level of liquids, slurries and granules. It is suitable for occasions with large changes in temperature and pressure; inert gas and volatilization. It can adopt the measurement method of microwave pulse and can work normally in the range of industrial frequency band. The beam energy is low, and it can be installed in various metal, non-metal containers or pipes without harming human body and the environment.

Note: The measurement range is calculated from the point where the beam touches the tank low, but in special cases, if the tank low 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 the tank is at a low liquid level, the tank can be seen low. 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 and reflect microwaves, but it can be measured under certain conditions

With the rapid development of the petroleum industry, oil storage tank liquid level measurement technology has received more and more general attention. In recent years, due to the continuous emergence of high technology such as computers, optical fibers, ultrasonics, servos, radars, the automatic liquid level measurement of oil tanks has entered a new stage of multi-function and high accuracy. At present, most refineries and petrochemical plants have many problems such as outdated detection technology, large detection errors, and difficult maintenance and debugging.
The old inspection methods are mainly:
The first is that the manual scale method is primitive and cumbersome, especially in harsh weather conditions, which brings unsafe factors to workers; the second is that the steel strip level gauge requires high installation for the first time, and mechanical friction affects the measurement accuracy. The sudden movement of the liquid level is not tracked in a timely manner, and winter heavy oil tanks are prone to freezing and freezing. Thirdly, weighing gauges must be blown into the tank during operation to lighten the oil and cause oil loss. It also pollutes the air. In addition, the blockage and leakage of the air induction tube affect the detection effect.
在现场的推广使用解决了油品储罐液位检测中存在的问题 According to the above problems, the promotion and use of DJ series non-contact radar level gauges produced by our company has solved the problems in the liquid level detection of oil storage tanks.