Speaker Failure Detection Using Voice-Coil Magnetic Induction
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Solution Overview
Problem
Existing speakers face challenges in identifying the cause of voice coil burnout, as excessive input or other factors, and when a fuse blows, the speaker cannot function, making failure diagnosis difficult.
Innovation Solution
Incorporating a detector with a closed circuit conductor that fuses under a predetermined condition, positioned to generate power from the voice coil's magnetic field fluctuations, allowing visual identification of excessive input without disrupting the speaker's operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fuse is connected to the voice coil to protect against excessive current, then the voice coil is protected from burnout, but the speaker cannot function after the fuse blows and the cause of failure cannot be identified
Solution Approach 1:
The patent divides the protective function into two separate components: a fuse for current protection and a detector for monitoring. The detector is a separate closed circuit with different fusion characteristics that can indicate failure causes without preventing the main voice coil from being protected by the fuse.
Solution Approach 2:
The detector acts as an intermediary element between the voice coil and the fuse. It monitors the electrical conditions and provides information about failure causes through its fusion characteristics, which differ from the fuse's characteristics, allowing diagnosis without compromising the protective function.
2Loss of information
If the speaker structure is altered to add failure detection capability, then failure cause identification becomes possible, but the device complexity increases
Solution Approach 1:
The detector is merged with the voice coil assembly, sharing the same magnetic field environment and electrical connection points. This integration allows the detector to monitor voice coil conditions without requiring separate sensing components or complex wiring arrangements.
Solution Approach 2:
The detector serves multiple functions: it monitors excessive current conditions, provides failure cause identification through its fusion characteristics, and maintains speaker operation continuity. This multi-functionality reduces the need for additional separate components.
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
Enables precise determination of failure causes, including burnout due to excessive input, without altering the speaker's structure or adding complex components, facilitating market use condition analysis and failure diagnosis.
Implementation Method 1
the at least one detector is disposed at a position where power is generated due to a fluctuation in a magnetic field generated by the voice coil
Data Source
AI summary
Provided is a speaker capable of presuming a cause of failure. A magnet, a vibrator, a voice coil configured to vibrate the vibrator, and a detector insulated from the voice coil and including a closed circuit of a conductor that is fused under a predetermined fusion condition, and the detector is disposed at a position where power is generated due to fluctuation in a magnetic field generated by the voice coil.