Electronic Timepiece Bluetooth Power Management via Motion Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electronic timepieces connected via Bluetooth to smartphones face battery life issues due to constant power consumption, and existing movement detection technologies fail to accurately detect user movements, leading to incomplete notification reception and inefficient power saving.
Innovation Solution
Incorporating a tilt detector and acceleration detector to selectively turn off the communication unit's power when no movement is detected, allowing for reliable near-field communication and power-saving modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the Bluetooth module power is frequently turned on and off to reduce accumulated power-on time, then power saving is improved, but notification reception reliability deteriorates when the user is stationary
Solution Approach 1:
The system dynamically adjusts the Bluetooth module power state based on real-time movement detection. When movement is detected, the module remains on to ensure notification reception. When no movement is detected for a predetermined period, the module is turned off to save power. This dynamic adaptation resolves the contradiction by making the power state contingent on user activity status.
Solution Approach 2:
The system uses acceleration sensors to continuously monitor user movement and provides feedback to the control unit. This feedback mechanism enables the system to make informed decisions about Bluetooth module power state, ensuring notifications are not missed during active periods while achieving power savings during stationary periods.
2Reliability
If the Bluetooth module remains constantly on to ensure notification reception, then notification reception reliability is improved, but battery life deteriorates
Solution Approach 1:
The system transitions from a static constant-power state to a dynamic state that adapts to user activity. By detecting movement patterns and adjusting Bluetooth module power state accordingly, the system maintains notification reliability during active periods while extending battery life during stationary periods through power reduction.
Solution Approach 2:
The system changes the operational parameters of the Bluetooth module based on detected user activity. When movement is detected, the module operates at full power for reliable communication. When stationary for a predetermined period, the module enters a low-power or off state, effectively changing its operational parameters to balance reliability and power consumption.
3Use of energy by moving object
If conventional movement detection is used to control Bluetooth power, then power saving is improved, but detection accuracy deteriorates for stationary activities
Solution Approach 1:
The system employs acceleration sensors that can detect multiple types of user activities including walking, running, and stationary movements. This multi-functional detection capability allows the system to accurately identify various activity states and make appropriate Bluetooth power management decisions, resolving the limitation of conventional movement detection methods.
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
This solution extends battery life by reducing unnecessary power consumption and ensures timely notification reception by efficiently managing the Bluetooth module's power usage based on user activity, while maintaining timekeeping functionality.
Implementation Method 1
a tilt detector to detect a tilting movement of a main body of the electronic timepiece
Implementation Method 2
an acceleration detector to detect an accelerated movement of the main body
Data Source
AI summary
An electronic timepiece includes a display unit, a communication unit, a tilt detector, an acceleration detector, and a power-off unit. The display unit displays information including information of time. The communication unit performs near field communication with an external device via an antenna. The tilt detector detects a tilting movement of a main body of the electronic timepiece. The acceleration detector detects an accelerated movement of the main body. The power-off unit turns off a power of the communication unit when the tilt detector does not detect the tilting movement and when the acceleration detector does not detect the accelerated movement.