Laser-Treated Flow Meter Electrodes for Stable Surface Conductivity
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Solution Overview
Problem
Existing surface treatment methods for measuring electrodes in magnetic-inductive flowmeters, such as mechanical blasting, cause structural damage to the carrier and conductive materials, leading to reduced surface conductivity and instability.
Innovation Solution
Irradiating the measuring electrodes' surfaces with a laser beam at a shallow angle to partially remove the carrier material and expose the embedded conductive material, using specific laser parameters to avoid damage and enhance conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical blasting processes are used to increase surface conductivity, then the conductive material is exposed in the surface area, but the carrier material and conductive material are structurally damaged
Solution Approach 1:
The patent replaces the mechanical blasting process with a laser-based surface treatment process. The laser beam irradiates the surface of the measuring electrodes, selectively removing the carrier material and exposing the conductive material without causing structural damage. This substitution of mechanical action with optical energy resolves the contradiction by achieving the same goal (exposing conductive material) without the harmful mechanical impacts that cause structural damage.
Solution Approach 2:
The patent changes the parameters of the surface treatment process by using controlled laser irradiation with specific energy densities and exposure times. By adjusting these parameters, the process selectively removes the carrier material while preserving the structural integrity of the conductive material. This parameter control allows the surface conductivity to be enhanced without the structural damage that occurs in mechanical blasting.
2Reliability
If the conductive material is exposed by removing carrier material, then electrical surface conductivity increases, but the surface becomes damaged and prone to adhesion
Solution Approach 1:
The patent replaces mechanical blasting with laser irradiation to expose the conductive material. The laser process provides precise control over material removal, exposing the conductive material while creating a clean surface without the mechanical damage and roughness that lead to adhesion problems. This substitution eliminates the harmful surface effects while achieving the desired electrical conductivity.
Solution Approach 2:
The laser beam acts as an intermediary that selectively interacts with the carrier material to remove it and expose the conductive material. The laser energy is absorbed by the carrier material, causing localized heating and removal, while the conductive material remains intact. This intermediary process allows for controlled exposure of the conductive material without direct mechanical contact that would cause damage.
3Reliability
If laser beam irradiation is used to remove carrier material and expose conductive material, then surface conductivity increases without structural damage, but precise control of laser parameters is required
Solution Approach 1:
The patent utilizes controlled changes in laser parameters (irradiation time, energy density, wavelength) to achieve selective removal of carrier material. By optimizing these parameters, the process achieves effective surface conductivity enhancement while maintaining structural integrity. The parameter control, while requiring precision, is managed through systematic adjustment to balance effectiveness and material preservation.
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
The method increases electrical surface conductivity without damaging the electrodes, providing stable and repeatable results with minimal material alteration.
Implementation Method 1
the surfaces of the measuring electrodes which are in contact with the inner wall of the measuring tube are irradiated with at least one laser beam, in which case the carrier material in the surface region of the measuring electrodes is at least partially removed and in which case the embedded electrically highly conductive material in the surface region of the measuring electrodes is at least partially exposed
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A method (1) for the surface treatment of measuring electrodes (4) inserted into a measuring tube (2) for magnetic-inductive flow meters (3) is presented and described, wherein the measuring electrodes (4) have at least an electrically poorly conductive support material (5) and an electrically highly conductive conductor material (6) embedded in the support material (5), such that the measuring electrodes (4) have an overall electrical conductivity suitable for the measuring task of the magnetic-inductive flow meter (3).An advantageous surface treatment is achieved by irradiating the surface areas (8) of the measuring electrodes (4) that terminate with the inner wall (7) of the measuring tube (2) with at least one laser beam (9), thereby at least partially removing the support material (5) in the surface area (8) of the measuring electrodes (4) and at least partially exposing the embedded electrically conductive conductor material (6) in the surface area (8) of the measuring electrodes (4) and increasing the electrical surface conductivity of the measuring electrodes (4).