Radar Fill-Level Neck Layout for 3D Profiling and Thermal Spacing
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Solution Overview
Problem
Existing fill level measuring devices struggle to accurately determine a three-dimensional fill level profile of non-uniform solid substances due to the difficulty in manufacturing and maintaining a large number of waveguides between the transmitting/receiving unit and antenna arrangement, especially under harsh process conditions.
Innovation Solution
A radar-based fill level measuring device with a defined number of transmitting and receiving antennas, connected via transmitting and receiving waveguides aligned radially symmetrically within a measuring device neck, utilizing MIMO principle for digital beam formation, and incorporating MMICs for signal processing, with waveguides designed as hollow conductors or dielectric waveguides to minimize thermal loading and maximize distance between components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a large number of waveguides are used to connect transmitting/receiving antennas in a MIMO-based three-dimensional fill level measuring device, then measurement precision is improved, but device complexity and manufacturing difficulty increase significantly
Solution Approach 1:
The patent implements nesting by placing transmitting waveguides and receiving waveguides concentrically within the measuring device neck, with transmitting waveguides arranged in an outer ring and receiving waveguides in an inner ring. This nested configuration allows multiple waveguides to occupy the same spatial region efficiently, reducing overall device complexity while maintaining the required number of connections for three-dimensional profiling
Solution Approach 2:
The patent transitions from a single-dimensional linear arrangement of waveguides to a two-dimensional radial arrangement within the measuring device neck cross-section. By organizing waveguides in concentric rings with specific angular positions, the system accommodates multiple transmitting and receiving waveguides in a compact circular footprint, simplifying the overall structure while preserving measurement capabilities
2Reliability
If the distance between the transmitting/receiving unit and antenna arrangement is increased for explosion protection, then safety is improved, but signal transmission loss increases
Solution Approach 1:
The patent introduces a measuring device neck as an intermediary component between the transmitting/receiving unit and the antenna arrangement. This neck serves as a transition structure that maintains explosion protection isolation while providing a structured pathway for waveguide signal transmission. The waveguides are integrated into the neck structure, allowing signals to pass through the isolation barrier with minimized loss
Solution Approach 2:
The system is segmented into distinct functional zones: the transmitting/receiving unit in the safe zone, the measuring device neck as a transition zone, and the antenna arrangement in the process zone. This segmentation allows the explosion protection distance to be optimized while maintaining efficient signal transmission through the structured waveguide paths in the transition zone
3Productivity
If multiple waveguides are arranged in parallel within the measuring device neck, then signal transmission efficiency is improved, but manufacturing and maintenance difficulty increase
Solution Approach 1:
The patent employs asymmetric positioning of transmitting and receiving waveguides within the measuring device neck cross-section. Transmitting waveguides are arranged in an outer ring while receiving waveguides occupy an inner ring position, creating an asymmetric concentric configuration. This asymmetric arrangement optimizes signal transmission paths while providing clear manufacturing and assembly guidance for distinguishing between transmitting and receiving connections
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables easy manufacturing and effective three-dimensional fill level profiling under challenging conditions by minimizing thermal loading and optimizing waveguide arrangement for efficient signal transmission and reception, while maintaining structural integrity and functional accuracy.
Implementation Method 1
radar based measuring methods are applied (according to the invention, the terminology, 'radar' refers to signals, or electromagnetic waves, having frequencies between 0.03 GHz and 300 GHz)
Implementation Method 2
after reflection of the radar signal on the fill substance surface, in each case, a received signal is receivable
Implementation Method 3
a number of transmitting waveguides corresponding to the number of transmitting antennas and extending within the measuring device neck in parallel with the device neck axis and connecting the transmitting antennas, in each case, with the transmitting/receiving unit
Data Source
AI summary
The relates to a measuring device neck of a radar based, fill level measuring device for determining a fill level profile (L(α,β)) of a fill substance. In the measuring device neck, the waveguides for contacting the antenna arrangement are aligned along a contour (k1, k2), which surrounds the device neck axis radially symmetrically and adjoins the measuring device neck. Such is advantageous, since the waveguides can be made together as a monolithic, basic body, which can be inserted easily into the measuring device neck. Furthermore, the arrangement of the waveguides in the measuring device neck favors the thermal management in the transmitting/receiving electronics of the fill level measuring device, since its thermally critical radar chips can be spaced maximally from one another.