Pressure Reference Filtering for Stable Gesture Signal Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing pressure detection solutions in human-computer interaction systems face accuracy issues due to invalid pressure signals, leading to missed or false detection of user gestures, which affect user experience.
Innovation Solution
A method and apparatus for determining a pressure reference value by analyzing amplitude and time characteristics of consecutive pressure signals, updating the reference value based on thresholds and using an IIR filter to reduce environmental impacts, ensuring accurate pressure detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pressure reference value is updated in real-time based on consecutive pressure signals, then pressure detection accuracy is improved, but system complexity increases
Solution Approach 1:
The system performs preliminary filtering and validation on consecutive pressure signals before updating the reference value. By pre-processing the signals to identify valid pressure events and filter out invalid ones (such as negative pressure signals), the system prepares clean data for reference value updates, thereby improving accuracy while controlling complexity through structured preprocessing steps
Solution Approach 2:
The patent introduces an intermediary processing layer that mediates between raw pressure signals and the reference value update mechanism. This intermediary layer validates signals, determines whether they represent genuine pressure events, and selectively updates the reference value only when appropriate, thus improving measurement precision while maintaining system simplicity through a clear separation of concerns
2Measurement precision
If pressure reference value is updated frequently to adapt to environmental changes, then measurement accuracy is improved, but false detection increases
Solution Approach 1:
The system implements a feedback mechanism that monitors the validity and characteristics of pressure signals before updating the reference value. By analyzing whether pressure events are genuine (positive pressure) or invalid (negative pressure), the system provides feedback control that prevents unnecessary updates, thereby reducing false detections while maintaining adaptability to real environmental changes through selective updates
Solution Approach 2:
The patent applies dynamic updating strategy where the reference value is updated adaptively based on the actual pressure signal characteristics. The system dynamically determines whether to update the reference value by analyzing the validity of each pressure event, making the update frequency variable rather than fixed, thus balancing measurement accuracy with false detection reduction through context-aware update timing
Data Source
AI summary
Embodiments of the present disclosure provide a method and apparatus for determining a pressure reference value, and a chip and an electronic device. The method includes: consecutively acquiring N pressure signals by a pressure sensor; acquiring consecutive N pressure values on the basis of the N pressure signals; and determining a latest pressure reference value on the basis of the consecutive N pressure values and time characteristics of the consecutively acquired N pressure signals; wherein each of the pressure values is a difference between a sampling value corresponding to a pressure signal and the pressure reference value, and the consecutively acquired N pressure signals are acquired within a duration where a pressure is applied to the pressure sensor once, N being a positive integer greater than 0.