Earphone Gesture Sensing for Keyless Waterproof Control
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Solution Overview
Problem
Traditional earphones with multiple keys face challenges in achieving a waterproof design and convenient control due to their key-based operation.
Innovation Solution
An earphone with a keyless control device utilizing infrared sensors and acceleration sensors to detect wearing state and user interactions, along with a Hall sensor for power management, enabling keyless operation and waterproof design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a button or switch is provided on the earphone for volume control, then volume adjustment is enabled, but the earphone structure becomes complex and aesthetics are degraded
Solution Approach 1:
The volume control function is extracted from the earphone body and relocated to the audio output device (speaker/headphones). The earphone only needs to transmit control signals without containing physical control components, thereby simplifying its structure while maintaining full volume control capability through the audio output device's interface
Solution Approach 2:
The audio output device is designed to perform multiple functions: it serves as both the sound output device and the volume control interface. By integrating volume control into the audio output device, a single component performs dual functions, eliminating the need for separate control mechanisms on the earphone
2Ease of operation
If a button or switch is provided on the earphone for playback control, then playback operations are enabled, but the earphone structure becomes complex and aesthetics are degraded
Solution Approach 1:
Playback control functions (play, pause, skip) are extracted from the earphone and implemented through the audio output device's interface. The earphone contains only sensing elements that detect user actions and transmit corresponding control signals, removing the need for physical playback buttons on the earphone body
Solution Approach 2:
The audio output device serves as a universal control hub that handles both volume adjustment and playback control operations. This multi-functional approach allows the earphone to remain simple while providing comprehensive control capabilities through the audio output device
3Reliability
If the control signal transmission requires line-of-sight or specific orientation, then transmission reliability is improved, but the ease of operation is degraded
Solution Approach 1:
The system automatically performs signal transmission without requiring user intervention for alignment or orientation. The transmitting and receiving units automatically establish communication when the audio output device is connected to the earphone, eliminating the need for users to manually adjust angles or positions to maintain line-of-sight
Solution Approach 2:
A wireless communication intermediary is introduced between the earphone and audio output device to enable flexible signal transmission. This intermediary allows control signals to be transmitted without strict line-of-sight requirements, accommodating natural user movements and positions while maintaining reliable communication
Data Source
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AI summary
The present application relates to the technical field of electronics, and discloses a keyless control device and an earphone, the first infrared sensor module 01 generates an infrared trigger signal when the earphone is in a wearing state; the Bluetooth control module 02 generates a plurality of enable signals according to the infrared trigger signal, and the left-ear infrared sensor module 03 generates a first detection signal according to a first enable signal when detecting that the left-ear component is swept past by a hand; the right-ear infrared sensor module 04 generates a second detection signal according to the second enable signal when detecting that the right-ear component is swept past by the hand; the left-ear acceleration sensor module 05 generates a third detection signal according to the third enable signal when detecting that the left-ear component is knocked; the right-ear acceleration sensor module 06 generates a fourth detection signal according to the fourth enable signal when detecting that the right-ear component is knocked; and finally, the Bluetooth control module performs corresponding functions according to the plurality of detection signals, the convenience of control of the earphone is improved, and a waterproof design of the earphone is facilitated.