Earphone Device Dual Sensor State Detection
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Solution Overview
Problem
Existing wireless earphones that automatically turn on or off using a single touch sensor may misjudge whether they are worn in the ears, leading to inaccurate state detection.
Innovation Solution
A dual-detection mechanism employing a pressure sensor and a touch sensor, where the pressure sensor detects pressure changes and the touch sensor detects external touches, with a control element automatically controlling the earphone's state based on combined signals to prevent misjudgment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single touch sensor is used for automatic on/off detection, then the ease of operation is improved, but the measurement precision deteriorates leading to misjudgment
Solution Approach 1:
The detection function is segmented into two independent sensors: a touch sensor for detecting external touches and a pressure sensor for detecting pressure changes. Each sensor handles a specific aspect of state detection, thereby improving overall measurement precision while maintaining automatic operation convenience.
Solution Approach 2:
The control element acts as an intermediary that receives and processes signals from both the touch sensor and pressure sensor. It combines information from both sensors to make accurate state judgments, preventing misjudgment that would occur with a single sensor.
2Measurement precision
If dual sensors are used for accurate state detection, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
The touch sensor and pressure sensor are merged into a coordinated detection system where both sensors share the same control element and work together to determine earphone state. This integration allows accurate state detection while managing complexity through unified control logic.
Solution Approach 2:
Both sensors are coupled to the same control element which handles multiple functions: receiving touch sensor signals, receiving pressure sensor signals, processing both signals together, and controlling power state. This multi-functionality reduces overall system complexity despite using multiple sensors.
3Measurement precision
If both sensors remain in sensing state continuously, then the measurement precision is maintained, but the energy consumption increases
Solution Approach 1:
Instead of continuous sensing, the system uses periodic action by switching between sensing and sleep states based on detection needs. When one sensor triggers a state change, the other sensor is switched to sleep mode, reducing power consumption while maintaining detection accuracy when needed.
Solution Approach 2:
The sensor system is made dynamic by allowing sensors to switch between active sensing state and low-power sleep state. The control element dynamically manages which sensor is active based on current detection requirements, optimizing the balance between measurement precision and energy consumption.
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
The dual-detection mechanism enhances sensing accuracy, preventing misjudgment of the earphone's state in use and achieving power savings by optimizing sensor states and reducing standby current consumption.
Implementation Method 1
The pressure sensor is disposed in the front chamber, is coupled to the control element, is configured to sense a pressure change in the front chamber, and accordingly generates a pressure-sensing signal
Implementation Method 2
The touch sensor is disposed in the rear chamber, is coupled to the control element, is configured to sense a first external touch applied to the main body, and accordingly generates a first trigger-sensing signal
Data Source
AI summary
An earphone device including a main body, a speaker, a control element, a pressure sensor, and a touch sensor is provided. The speaker is disposed in the main body for dividing the main body into a front chamber and a rear chamber. The control element is disposed in the rear chamber. The pressure sensor is disposed in the front chamber, is coupled to the control element, is configured to sense a pressure change in the front chamber, and accordingly generates a pressure-sensing signal. The touch sensor is disposed in the rear chamber, is coupled to the control element, is configured to sense a first external touch applied to the main body, and accordingly generates a first trigger-sensing signal. The control element automatically controls an action of the earphone device according to the pressure-sensing signal and the first trigger-sensing signal.