HOTLINE 0086-29-88606479
  Tel: 86-29-88606479   E-mail:


About us

Factors that should be considered when designing signal processing of radar level meter

DATE: 2020-09-01

The radar level meter is a very practical level measurement tool. In the actual industrial application site, there will be many non-ideal situations. When designing the signal processing method for the radar level meter, the following five factors must be considered:

1. The application occasions of radar level meters are often confined narrow spaces, rather than open huge spaces. The signal emitted by the radar level meter is an electromagnetic wave, which diverges in space and has all the characteristics of electromagnetic waves, such as reflection, diffraction, and refraction. Any object in the propagation space will produce signal reflection. A small space will produce many reflected signals, including direct reflection signals on the surface of an object, and back and forth reflections and oscillations (multiple reflections between surfaces).

2. When the height of the liquid level is different, it means that the shape of the measurement space is constantly changing, and the reflection and oscillation of the signal are also different. Especially when the measuring space has a curved surface, such as a dome-top tank, a spherical container or a horizontal elliptical tank, since the curved surface has a focusing effect on electromagnetic waves, the height change of the liquid level has a greater impact on the reflection.

3. After the radar level meter is installed and put into use, the space surface conditions of the application occasions are constantly changing. Taking the reaction tank as an example, there are various media to be measured in the chemical process, and the liquid level will change when the material is fed, such as material adhesion, changes in the physical or chemical properties of the tank body surface, etc. These changes will inevitably affect reflection The strength of the signal.

4. The medium of some application sites will directly affect the transmission and reception of radar waves. On the one hand, it is manifested in the impact on the antenna. If steam condenses on the surface of the antenna, the material crystallizes on the surface of the antenna. On the other hand, the volatilization or atomization of the medium in the tank will also affect the propagation of radar waves, which will affect the measurement.

5. The measured liquid level also has a variety of changes, such as a mirror when it is still; when the liquid level changes, the surface will fluctuate; sometimes there may be bubbles. Under different circumstances, the multiple reflections of the signal will change.

Share to
  • Number of clicks: 201
    2020 - 10 - 22
    Application of Radar level gauge in Natural Gas Chemical Industry Natural gas chemical industry is one of the branches of the chemical industry. An industry that uses natural gas as a raw material to produce chemical products. Natural gas chemical industry can also be attributed to petrochemical industry. Generally include the purification and separation of natural gas and chemical processing. Through purification, separation and cracking, steam reforming, oxidation, chlorination, sulfurization, nitration, dehydrogenation and other reactions, it can be made into synthetic ammonia, methanol and its processed products (formaldehyde, dimethyl ether, acetic acid, olefin, etc.), acetylene and its deep processing Products, etc. Purification and separation   Including nat...
  • Number of clicks: 232
    2020 - 10 - 20
    As we all know, container level measurement and control is one of the most common instrument automation applications in the chemical production process. It is not only related to the smooth operation of the process and safe production, but also essential to the control of product quality and output. There are many kinds of level measuring instruments, such as ultrasonic, static pressure, resistance rotation, radio frequency admittance and so on. In catalyst production, the working conditions of some storage tanks are more complicated. For example, there are many unfavorable factors for level measurement such as dust, steam, fouling, stirring, etc., resulting in high failure rate of traditional level meters, large maintenance, and online maintenance. Difficulty, short period of use, and uns...
  • Number of clicks: 232
    2020 - 10 - 13
    Radar level meter are used in many storage tanks, mainly through this non-contact measurement method to measure the amount of liquid in the storage tank. The radar level meter can emit an invisible microwave pulse, which is then converted into a level signal by the signal received by the antenna, showing an accurate value, safe to use and convenient to measure.Speaking of the reasons for the emergence of radar level meter, the main reason is that there are several reasons.1. The needs of the industryIn many industries, it is necessary to know the storage capacity of the storage tank, but it cannot be measured manually, so this high-tech radar level meter is needed. The radar level meter can work normally in the industrial frequency band, and it is easy to install, ...
  • Number of clicks: 182
    2020 - 09 - 29
    Measures against lightning strikes for radar level gaugesWith the need for the development of industrial automation, the instrumentation industry has developed rapidly. However, most of these intelligent instruments, which use a large number of micro-electric devices, have low insulation strength and primary problems with surge resistance. Therefore, the lightning protection of smart instruments and meters is very important, especially during the thunderstorm season to avoid huge losses.Guided wave radar level gauge instrument lightning protection, we must start unilaterally, including internal system lightning protection and internal system lightning protection, generally mainly by participating in lightning protection devices. Specifically, the following methods can be used to develop li...
  • Number of clicks: 1002
    2020 - 09 - 24
    Instrument knowledge|Radar level meter, how to reduce the interference in the tank on the measurement When we install the radar level meter, we will encounter many on-site storage tanks with supports, such as beams and brackets,etc . . . These supports will interfere with the signal of the radar level meter. If the above interference objects appear in the radar emission area, when the normal liquid level is below the interference objects, it will inevitably affect the normal measurement of the radar level meter, and false echo signals will appear. When encountering such situations, there are the following solutions: Method 1: Cleaning up on-site interferenceIf the interference is too large, completely occludes or most of the transmission signal of the radar level meter,...
Tel:86-29 88606479
Fax: 86-29 88385903
B203, Gazelle Valley, No.69 Jinye Rd, Hi-tech zone, Xi'an, Shaanxi Province, P.R.China. 710077
Copyright ©2018 - 2019 Dechuang Electrical Technology Co., Ltd SITEMAP
Rhino Cloud Provides Enterprise Cloud Services