Coaxial Tweeter Thermal Protection Using Woofer Temperature Feedback
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Solution Overview
Problem
Current coaxial speaker temperature detection methods lack real-time feedback and precision in predicting tweeter temperature, leading to potential damage from excessive heat due to the absence of a feedback link.
Innovation Solution
A method that uses the woofer's real-time temperature to predict the tweeter's temperature through a prediction algorithm, applying power suppression if the tweeter's temperature exceeds a threshold to prevent damage, by processing audio signals through a sound effect algorithm and temperature protection module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the capacitor is connected at the input end of the tweeter in parallel with the woofer, then the tweeter can generate intermediate-frequency and high-frequency signals, but the branch circuit where the tweeter is located becomes similar to be broken for detecting low-frequency signals, making it impossible to detect the tweeter temperature directly
Solution Approach 1:
The patent uses the woofer temperature as an intermediary parameter to indirectly predict the tweeter temperature. Since direct tweeter temperature detection is difficult due to the capacitor blocking low-frequency detection signals, the system measures the woofer temperature (which is accessible) and uses it as a mediator to estimate the tweeter temperature through a prediction algorithm, thus avoiding the direct detection problem.
Solution Approach 2:
The patent implements a feedback mechanism by continuously monitoring the woofer temperature and using it to adjust the tweeter temperature prediction and protection strategies. The system feeds back the predicted tweeter temperature to the protection algorithm, which then adjusts the input signal to prevent overheating, creating a closed-loop control system.
2Reliability
If the tweeter temperature protection algorithm processes the first audio signal before input to the coaxial speaker, then the tweeter temperature risk is reduced, but there is no feedback link to correct the real-time temperature of the voice coil, limiting prediction precision
Solution Approach 1:
The patent introduces a feedback link by using the measured woofer temperature to continuously update and correct the tweeter temperature prediction. The system doesn't just rely on open-loop prediction but uses the actual woofer temperature feedback to improve the accuracy of tweeter temperature estimation through the prediction algorithm, thereby enhancing both reliability and precision.
Solution Approach 2:
The system uses the available woofer temperature data to serve the purpose of tweeter temperature monitoring. By leveraging the existing temperature measurement infrastructure (woofer temperature detection) to provide information for tweeter protection, the system achieves self-service functionality without requiring additional complex detection hardware.
3Power
If the input power or voltage peak is too large, then the coaxial speaker can deliver high output power, but the amplitude and temperature of the coaxial speaker may be exceeded, causing abnormal sound or device damage
Solution Approach 1:
The patent applies preliminary anti-action by using the protection algorithm to predict potential overheating conditions before they occur. The system analyzes the input signal characteristics and predicted temperature trends in advance, and takes preventive action by adjusting or limiting the input signal to the tweeter before the temperature exceeds safe thresholds, thereby preventing damage rather than reacting after overheating occurs.
Solution Approach 2:
The patent implements dynamic control by continuously adjusting the tweeter input signal based on real-time conditions. The protection algorithm dynamically modifies the signal processing parameters according to the current temperature state and predicted temperature trends, allowing the system to deliver maximum power when safe and reduce power when temperature risks are detected, creating a dynamic balance between power output and temperature control.
Data Source
AI summary
A coaxial speaker tweeter temperature protection method, a coaxial speaker tweeter temperature protection system, and a computer-readable storage medium are provided. The coaxial speaker tweeter temperature protection method is applied to a coaxial speaker including a tweeter and a woofer, including steps of acquiring a woofer real-time temperature, performing calculation on the woofer real-time temperature and a pre-processed input signal through a tweeter temperature prediction algorithm to predict a tweeter real-time temperature in a current state, where the pre-processed input signal is a signal acquired after processing a sound effect algorithm on an input audio signal, etc. Compared with the related art, the coaxial speaker tweeter temperature protection method, the coaxial speaker tweeter temperature protection system, the electronic device, and the computer-readable storage medium provide better temperature protection for the tweeter, reliability of which is better.