Pressure Signal Fitting Method for Sensor Array Accuracy
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Solution Overview
Problem
Existing pressure distribution measurement systems face inconsistencies in measurement ranges and interference issues across different manufacturers' sensors, leading to inaccurate pressure signal measurements.
Innovation Solution
A pressure signal fitting method and apparatus that applies pressure to each sensing point, integrates the pressure-resistance relationship, corrects it using a numerical filtering algorithm, and fits it with a curve fitting formula, allowing for optimized pressure calculations and multi-channel signal switching through an integrated analog electronic switch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If theoretical derivation and numerical filtering are used to achieve accurate measurement results, then measurement precision is improved, but device complexity and processing time increase
Solution Approach 1:
The patent pre-calculates and stores pressure-resistance relationship curves for multiple sensing points during the sensor manufacturing process. These pre-established curves are saved in the controller's memory, eliminating the need for complex real-time theoretical derivation and numerical filtering operations during actual pressure measurement, thus reducing processing complexity while maintaining high measurement precision
Solution Approach 2:
The patent creates copies of pressure-resistance relationship data by pre-measuring and storing characteristic curves for each sensing point. These copied data sets are stored in memory and directly used during operation, replacing complex real-time calculations with simple data lookup and comparison operations, thereby reducing device complexity and processing time
2Measurement precision
If separate measurement circuits are used for each sensing point, then measurement precision is maintained, but device complexity and circuit interference increase
Solution Approach 1:
The patent merges multiple separate measurement circuits into a single shared circuit by using an analog switch to sequentially connect different sensing points to the same measurement pathway. This consolidation reduces circuit complexity and minimizes interference between channels while maintaining measurement precision through time-multiplexed sampling of each sensing point
Solution Approach 2:
The patent implements periodic switching between different sensing points using an analog switch controlled by a timing sequence. Each sensing point is measured in turn at regular intervals, allowing a single circuit to service multiple sensing points without interference, thus reducing circuit complexity while preserving measurement accuracy through systematic sequential sampling
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 method standardizes signal fitting, improves measurement accuracy, and enhances signal acquisition efficiency by correcting pressure-resistance relationships and enabling efficient multi-channel signal switching.
Implementation Method 1
measuring and integrating a relationship between the pressure and a resistance of each pressurized sensing point to obtain a pressure-resistance relationship
Data Source
AI summary
The present disclosure provides a pressure signal fitting method and apparatus. The method comprises the steps of: applying a pressure to each sensing point in a pressure sensor, measuring and integrating a relationship between the pressure and a resistance of each sensing point to obtain a pressure-resistance relationship; correcting the pressure-resistance relationship through a numerical filtering algorithm, and fitting the corrected pressure-resistance relationship to obtain an optimized pressure-resistance relationship; switching sensing points of a voltage sensing circuit by an integrated analog electronic switch to measure voltages of a plurality of arrayed sensing points pressurized; calculating resistances of the plurality of arrayed sensing points according to the measured voltages and in conjunction with an acquisition circuit; calculating pressures of the plurality of arrayed sensing points through the optimized pressure-resistance relationship; and based on areas of pressure zones and non-pressure zones of the plurality of sensing points, calculating actual pressures of the plurality of arrayed sensing points from the calculated pressures thereof through a relationship between the pressure and an intensity of pressure.