Headset Head-Beam Stretch Sensing for Accurate Wear Detection
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Solution Overview
Problem
Existing headset devices face challenges with high assembly costs and inaccurate wearing detection due to issues with IR proximity sensors and capacitive sensors, particularly when encountering metals.
Innovation Solution
A headset device with a sensing circuit on the head beam that provides a sensing value based on stretch changes, using a determination circuit and microcontroller to control headset states, reducing assembly complexity and improving detection accuracy by avoiding interference from external metals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If IR proximity sensor is used for wearing detection, then detection function is achieved, but assembly cost increases and assembly difficulty increases
Solution Approach 1:
The patent replaces expensive IR proximity sensors with a cost-effective stretch sensing mechanism that utilizes the inherent elastic properties of the headbeam material. This approach uses simple, inexpensive sensing elements (such as strain gauges or conductive threads) integrated into the headbeam structure, eliminating the need for costly specialized sensors while maintaining wearing detection functionality.
Solution Approach 2:
The patent substitutes optical sensing (IR proximity sensor) with a mechanical sensing approach that directly measures the physical stretching of the headbeam. By using the mechanical deformation of the headbeam itself as the sensing mechanism, the system eliminates complex optical components and their associated assembly requirements, reducing both cost and assembly difficulty.
2Measurement precision
If capacitive sensor is used for wearing detection, then detection function is achieved, but determination accuracy decreases when metals are present
Solution Approach 1:
The patent extracts the sensing function from the headset components and relocates it to the headbeam itself. By measuring the stretch of the headbeam directly, the system eliminates dependence on capacitive changes that are susceptible to metal interference. The sensing mechanism is separated from the headset parts that may be affected by external metals.
Solution Approach 2:
The patent introduces the headbeam stretch as an intermediary measurement parameter between the wearing state and the detection system. Instead of directly measuring capacitive changes that are easily interfered with by metals, the system measures the mechanical stretch of the headbeam, which serves as a reliable intermediary indicator of wearing status that is not affected by external metal objects.
3Ease of manufacture
If stretch sensing is used on head beam, then assembly cost decreases and assembly difficulty decreases, but new sensing mechanism is required
Solution Approach 1:
The patent makes the headbeam serve multiple functions: it provides structural support for the headset and simultaneously acts as the sensing element for wearing detection. The headbeam's elastic properties are utilized for both mechanical support and stretch measurement, eliminating the need for separate sensing components and reducing overall device complexity.
Solution Approach 2:
The headbeam serves itself as the sensing element by utilizing its own mechanical properties (elasticity and stretch) to detect wearing status. The structure that supports the headset also provides the sensing function, eliminating the need for additional dedicated sensing components and simplifying the overall system architecture.
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 solution achieves low-cost assembly and high determination accuracy by using stretch-based sensing, minimizing incorrect operations and ensuring low power consumption through intermittent microcontroller sleep.
Implementation Method 1
The sensing circuit 110 provides a sensing value SS corresponding to a stretch change of the head beam HB
Data Source
AI summary
A headset device and a control method thereof are provided. The headset device includes a head beam, a headset, a sensing circuit, a determination circuit, and a microcontroller. The headset is joined to an end portion of the head beam. The sensing circuit is disposed at the head beam. The sensing circuit provides a sensing value corresponding to a stretch change of the head beam according to the stretch change of the head beam. The determination circuit compares the sensing value with a first reference value to generate a first determination signal and compares the sensing value with a second reference value to generate a second determination signal. The microcontroller controls the headset to enter one of a turned-on state and a turned-off state according to the first determination signal and the second determination signal.