Speaker Temperature Sensing via Voice Coil Impedance
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Solution Overview
Problem
Existing electronic devices with speakers face challenges in accurately measuring the temperature of the speaker, leading to narrow temperature ranges for maintaining quality and potential damage due to temperature-induced deformation, necessitating a method for precise temperature measurement and control.
Innovation Solution
Incorporating a temperature sensor within the speaker and using impedance measurements of the voice coil to determine the speaker's temperature, allowing for accurate temperature monitoring and adjustment of device functions to prevent damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature sensor is installed inside the speaker to directly measure temperature, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent uses the voice coil as an intermediary element to indirectly measure temperature. Instead of placing a temperature sensor directly in the speaker, the system measures the impedance of the voice coil, which changes with temperature. This intermediary approach allows temperature measurement without adding complex sensor hardware inside the speaker.
Solution Approach 2:
The patent replaces the mechanical/physical temperature sensing system with an electrical measurement system. By substituting direct thermal measurement with electrical impedance measurement of the voice coil, the system achieves temperature monitoring without the complexity of physical temperature sensors inside the speaker.
2Productivity
If the temperature range for speaker operation is widened, then productivity is improved, but reliability deteriorates due to increased risk of damage
Solution Approach 1:
The patent implements a feedback mechanism where the voice coil impedance is continuously measured to monitor temperature. Based on this feedback, the system can adjust operation parameters or alert users when temperature approaches dangerous levels, allowing the speaker to operate within a wider range while maintaining reliability through active monitoring and control.
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 approach enables a wider temperature range for maintaining speaker quality and reduces the risk of damage by accurately measuring and managing the speaker's temperature, thereby enhancing operational reliability.
Implementation Method 1
obtain a first temperature of the at least some area using a temperature sensor disposed in at least some area inside the speaker
Implementation Method 2
obtain a second temperature based on measuring impedance of a voice coil included in the speaker
Data Source
AI summary
An electronic device according to various embodiments, may include a speaker, a temperature sensor disposed in at least some area inside the speaker, and at least one processor configured to obtain a first temperature of the at least some area using the temperature sensor, obtain a second temperature based on measuring impedance of a voice coil included in the speaker, determine a temperature of the speaker based on at least one of the first temperature and the second temperature, and change a function of the electronic device based at least on the determined temperature of the speaker.