Ellipsoidal Probe Spacing Element for Radar Level Gauges
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Solution Overview
Problem
Guided wave radar level gauges face challenges in using probes in inclined or curved pipes due to signal interference from the pipe walls, and existing solutions are complex to install and remove.
Innovation Solution
The use of probe spacing elements with an ellipsoidal shell structure and flow openings maintains the probe at a fixed distance from the pipe wall, reducing signal interference and allowing fluid flow, enabling accurate level measurement in inclined or curved configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a wire probe is used in an inclined or curved pipe, then the probe can be installed in obstructed environments, but the probe makes contact with the inner wall of the pipe causing signal interference
Solution Approach 1:
The patent introduces an intermediary substance (spacer material such as foam, rubber, or plastic) between the probe and the pipe wall. This spacer acts as a mediator that maintains the required spacing while allowing the probe to navigate inclined or curved pipes, thus eliminating direct contact and signal interference while preserving installation adaptability.
Solution Approach 2:
The patent employs flexible spacer materials that can conform to the curved or inclined geometry of the pipe while maintaining the probe at a consistent distance from the pipe wall. These flexible elements adapt to the pipe configuration without requiring rigid structural support, enabling installation in obstructed environments without signal interference.
2Reliability
If spacers are attached to the walls of the tube to hold the probe, then the probe position is fixed, but the installation and removal becomes complicated requiring disassembly of the entire measurement tube
Solution Approach 1:
The patent designs the spacer to be self-adhering to the pipe wall through adhesive backing or mechanical expansion, eliminating the need for separate attachment mechanisms. The probe simply needs to be inserted and the spacer automatically secures it in position, allowing for tool-free installation and removal without disassembling the measurement tube.
Solution Approach 2:
The patent divides the spacing function into separate modular spacer elements that can be independently attached to the pipe wall or integrated onto the probe. This segmentation allows the spacers to remain fixed on the pipe while the probe is easily inserted and removed, maintaining reliable positioning without complicating installation or maintenance procedures.
3Object-affected harmful factors
If material is placed adjacent to the probe to maintain spacing, then signal interference is reduced, but the complexity of the device increases
Solution Approach 1:
The patent integrates the spacing function into the probe assembly itself by incorporating spacers as integral components during manufacturing. This multi-functional design simultaneously provides structural support, maintains proper spacing from the pipe wall, and prevents signal interference, all through a single unified component rather than multiple separate elements.
Solution Approach 2:
The patent uses thin, flexible spacer materials that can be applied as coatings or laminated layers on the probe surface. These thin films maintain the necessary spacing with minimal material thickness, reducing the overall device complexity while still effectively preventing signal interference through consistent dielectric separation.
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
This configuration minimizes material adjacent to the probe, reducing signal interference and allowing accurate level detection in turbulent or obstructed environments, with simplified installation and maintenance.
Implementation Method 1
a plurality of flow openings allowing fluid flow between the exterior and interior of the shell
Implementation Method 2
maintains the probe at a fixed distance from the pipe wall
Implementation Method 3
transceiver for transmitting electromagnetic transmission signals and receiving reflected electromagnetic signals reflected at a surface of the product
Implementation Method 4
guided wave radar level gauge system for determining a filling level of a product contained in a tank
Data Source
Figure 1
Figure 2
Figure 3a
AI summary
The present invention relates to a guided wave radar level gauge system for determining a filling level of a product contained in a tank. The level gauge system comprises a transceiver for transmitting and receiving electromagnetic signals, a probe extending into the tank and configured to guide the signals towards the surface and to guide reflected signals back to the transceiver, processing circuitry for determining the filing level based on the reflected signals, and a plurality of spacing elements arranged on the probe. Each spacing element comprises a shell structure having an ellipsoidal shape defining an ellipsoidal space, first and second shell openings at first and second locations of the shell, such that a passage through the shell openings defines a passage through the spherical space, wherein the probe extends through the passage, and a plurality of flow openings allowing fluid flow between the exterior and interior of the shell.