Measuring Channel Sensor Placement Using Actual Geometry Feedback
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Solution Overview
Problem
Existing measuring channels in process engineering face challenges in achieving high-precision measurements of process fluid parameters, especially in complex geometries, due to sensor components protruding into the flow, causing inhomogeneous flow conditions and measurement inaccuracies, and the high costs associated with precise manufacturing and assembly.
Innovation Solution
A method for spatially arranging sensor components within a measuring channel using a predetermined target geometry and actual geometry detection, allowing for precise positioning and orientation of sensor components without the need for reference points, thereby ensuring accurate placement and alignment, even in imprecisely manufactured channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensor components are arranged to protrude into the channel interior to enable measurement, then measurement capability is achieved, but flow homogeneity deteriorates and measurement accuracy worsens
Solution Approach 1:
The sensor components are extracted from the channel interior and relocated to the outer surface of the channel wall. This allows the sensors to measure flow parameters (velocity, temperature, pressure) without protruding into the flow path, thereby eliminating flow disturbances and inhomogeneities while maintaining measurement capability through non-intrusive sensing on the external surface
Solution Approach 2:
The channel wall itself serves as an intermediary medium between the sensors and the process fluid. Sensors mounted on the outer surface detect parameters that are transmitted through the channel wall from the fluid, allowing indirect measurement without direct contact or protrusion into the flow, thus avoiding flow disruption while achieving accurate measurements
2Measurement precision
If multiple sensor components are precisely aligned relative to each other to form arrays, then measurement accuracy improves, but positioning difficulty increases
Solution Approach 1:
The channel wall structure itself provides self-aligning features such as integrated mounting recesses, reference surfaces, or geometric constraints that automatically guide sensor components into their correct positions and orientations. This self-service mechanism eliminates the need for complex external alignment procedures, making it easy to achieve precise sensor array configuration during assembly
Solution Approach 2:
Mounting features, reference marks, or positioning structures are pre-formed in the channel wall during manufacturing before sensor installation. These preliminary preparations include precisely located recesses, alignment pins, or surface features that guide sensor placement, thereby simplifying the assembly process and ensuring accurate relative positioning of multiple sensor components without requiring complex alignment operations
3Measurement precision
If high manufacturing precision is applied to the measuring channel to ensure sensor positioning accuracy, then measurement accuracy improves, but manufacturing cost increases
Solution Approach 1:
The sensors are extracted from the channel interior and mounted on the outer surface, which allows the use of standard manufacturing tolerances for the channel wall while still achieving precise sensor positioning through external mounting features. This approach eliminates the need for high-precision internal bore machining and complex internal sensor alignment, significantly reducing manufacturing costs while maintaining measurement accuracy
Solution Approach 2:
Sensor mounting features and reference structures are incorporated into the channel wall design and manufactured as integral parts using conventional machining or casting processes with standard tolerances. These preliminary features provide sufficient positioning accuracy for sensor arrays without requiring expensive high-precision manufacturing, thereby reducing overall manufacturing costs while ensuring adequate measurement precision
Data Source
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Figure 4b~5a
AI summary
Method for spatially arranging at least one sensor component in a measurement channel, comprising the steps of: a) providing a predetermined target geometry of the measurement channel; b) providing a target arrangement of sensor components associated with the target geometry of the measurement channel, wherein the target arrangement includes spatially defined position parameters and orientation parameters; c) at least partially acquiring an actual geometry of the measurement channel;d) Check whether at least one position parameter or orientation parameter of the target sensor component arrangement lies outside a permissible range with respect to the actual geometry, wherein, if the check reveals that at least one position parameter or orientation parameter of the target arrangement lies outside a permissible range relative to the actual geometry, this position or orientation parameter of the target sensor component arrangement is recalculated while adhering to the permissible range and then step d) is repeated; e) Arrange the sensor component in the measuring channel according to the most recent target sensor component arrangement.