Guided Wave Tank Level Sensor

Kaineder, Alexander; Stelzer, Andreas; Michenthaler, Christof; Hammerschmidt, Dirk

doi:10.23919/eumc.2019.8910870

Cited by 5 publications

(3 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Contact-based measurements, such as guided wave radars [4][5][6] or capacitive probes [7,8], have a significant disadvantage that debris can settle, as seen in Fig. 1, which significantly affects the accuracy and dynamic response to fast fill level changes.…”

Section: Introductionmentioning

confidence: 99%

Fill level measurement of low-permittivity material using an M-sequence UWB radar

Wegner

Gebhardt²,

Galdo

2023

Int. J. Microw. Wireless Technol.

View full text Add to dashboard Cite

Due to increasingly complex and automated manufacturing processes, the demands on the control parameters of these processes are also increasing. One parameter is the fill quantity of, e.g., liquids in production plants, whose precise determination is of ever-growing importance. Up to now, the exact level of determination under difficult conditions, such as high ambient temperatures, has been a particular challenge. This paper demonstrates a novel method by which an M-sequence UWB radar can determine levels of low-permittivity materials in small metal containers. For this purpose, hot melt is used as an example. Thus, the influence of large temperature differences on the long-term stability of level measurement can also be investigated. The measurements show that the level of hot melt can be measured to be long-term stable with an accuracy of better than 3 mm. Furthermore, the precise determination of the empty state is highly important for many applications. For this reason, this paper shows a method for determining the empty state without complex calibration procedures. For the empty level indication, an accuracy of up to 0.5 mm could be achieved for molten hot glue and 3% of the tank volume, independent of the shape or aggregate state of the medium.

show abstract

Section: Introductionmentioning

confidence: 99%

Fill level measurement of low-permittivity material using an M-sequence UWB radar

Wegner

Gebhardt²,

Galdo

2023

Int. J. Microw. Wireless Technol.

View full text Add to dashboard Cite

show abstract

“…Contact-based measurements, such as guided wave radars [1,2] or capacitive probes [3,4], have the major disadvantage that they are not suitable for volumetric measurement of a complete container, since, depending on the application, bulk cones can also form. Contactless radar measurements have the advantage that they can measure volumetrically.…”

Section: Introductionmentioning

confidence: 99%

Fill level measurements using an M-sequence UWB radar

Galdo

2022

Int. J. Microw. Wireless Technol.

View full text Add to dashboard Cite

Due to increasingly complex and automated manufacturing processes, the demands on the control parameters of these processes are also increasing. In many applications, such a parameter is the fill quantity, whose precise determination is of ever growing importance. This paper shows with which accuracy and precision an M-sequence ultra-wideband radar can determine levels in small metallic and non-metallic containers with contact-based and contactless measurements. First, the principle of level measurement using guided wave radar is explained and the measurement setup is described. Afterward, the measurement results are shown and discussed. The measurements show that the level can be measured with an accuracy of better than 0.5 mm. In addition, level fluctuations can be detected with a precision of 3 ${\rm \mu }$ m. Based on the results of the guided wave radar, the possibilities of volumetric contactless measurement using an electrically small patch antenna are discussed. A particular challenge in contactless level measurement is the high number of multipath components, which strongly influence the accuracy. In addition, there are near-field effects when measuring close to the antenna. Exploiting these near-field effects, an additional method to accurately determine the full state of the container is investigated.

show abstract

“…Today, radar-based remote sensing systems are used in many fields of application: A big sector are industrial applications, where the positions and quantities of tools and goods need to be tracked continuously to increase efficiency. Examples are the measurement of levels of fluids and solids in storage tanks [2]- [4], where a radar sensor is preferred over conventional systems to avoid direct contact to the sample. Especially if oil or gas at a high pressure is used, for example to displace pistons or hydraulic cylinders, radar systems are an attractive alternative [5]- [7].…”

Section: Introductionmentioning

confidence: 99%

Micrometer Sensing With Microwaves: Precise Radar Systems for Innovative Measurement Applications

et al. 2021

View full text Add to dashboard Cite

Radar sensors have been widely used to estimate speed and displacement of remote targets. A novel market for contactless radar sensing is emerging in the field of automatization and process analysis, where non destructive testing and evaluation methods are desired. Here, modern radar systems offer various advantages over conventional sensors since they enable the contactless, continuous, and cost-efficient measurement of static or dynamic ranges. These can further be used for vibration and vital sign characterization. Advances in microwave technology, an increasing integration density, and the development of novel algorithms keep boosting the performance of the systems. After introducing the most common operation principles, such as unmodulated and frequency-modulated continuous-wave radar, different design aspects and building blocks of cutting-edge systems are explained in detail. In the second part, selected applications are described in detail. These include the sheet thickness monitoring of metallic foils, and the measurement of the ground speed of vehicles with the latest approaches. Exemplary low-power radar systems are presented to show the limits in terms of power consumption while still offering a high measurement precision. In addition, the topics of mechanical vibration sensing and vital sign sensing are addressed by introducing tailored systems.INDEX TERMS Radar theory, radar remote sensing, Doppler radar, radar applications.

show abstract

Guided Wave Tank Level Sensor

Cited by 5 publications

References 4 publications

Fill level measurement of low-permittivity material using an M-sequence UWB radar

Fill level measurement of low-permittivity material using an M-sequence UWB radar

Fill level measurements using an M-sequence UWB radar

Micrometer Sensing With Microwaves: Precise Radar Systems for Innovative Measurement Applications

Contact Info

Product

Resources

About