Wireless Device Tilt-Aware Audio Filter Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communications devices experience a deterioration in reception sensitivity when their attitude changes, requiring a simpler configuration to prevent this degradation.
Innovation Solution
Incorporating an acceleration sensor to detect tilt angles and switch between two audio filters with different frequency characteristics, selecting the second audio filter with a higher low-frequency cutoff when the tilt angle exceeds a threshold to maintain reception sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple antennas are used to prevent reception sensitivity deterioration, then reception sensitivity is improved, but device complexity increases
Solution Approach 1:
The patent changes the parameter of audio filter frequency characteristics based on the tilt angle detected by the acceleration sensor. When the tilt angle exceeds a threshold, the system switches to a second audio filter with different frequency characteristics (higher lower cutoff frequency) to compensate for reception sensitivity deterioration, eliminating the need for multiple antennas
2Reliability
If audio filter frequency characteristics are adjusted to maintain reception sensitivity, then reception sensitivity is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic switching between different audio filters based on real-time tilt angle detection. The selector switches the audio filter configuration dynamically according to whether the tilt angle exceeds the threshold, allowing the system to adapt to changing device orientations and maintain optimal reception sensitivity
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 effectively prevents reception sensitivity deterioration due to attitude changes without the need for multiple antennas, ensuring consistent audio signal quality across varying device orientations.
Implementation Method 1
an acceleration sensor configured to detect acceleration; an angle calculator configured to calculate, based on the acceleration, a tilt angle of the wireless communications device
Data Source
AI summary
An angle calculator calculates, based on acceleration detected by an acceleration sensor, a tilt angle of a transceiver with respect to the vertical direction. A selector (i) selects a first audio filter to operate if the tilt angle is less than a threshold angle, or (ii) selects a second audio filter to operate if the tilt angle is equal to or greater than the threshold angle. The second audio filter has a lower cutoff frequency that is higher than the lower cutoff frequency of the first audio filter.