Wearable Positioning Module Power Management via Movement Distance
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Solution Overview
Problem
Existing wearable devices equipped with satellite radio wave sensors face delays in starting movement record acquisition due to the need for satellite signal reception, leading to prolonged power consumption and delayed recording preparation when used indoors or in areas with poor satellite coverage.
Innovation Solution
An electronic device with a positioning module, a movement distance detection sensor, and a processor that manages power cycles of the positioning module based on successful satellite signal acquisition, using the movement sensor to resume positioning when a prescribed distance is detected, thereby reducing power consumption and shortening preparation time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the satellite radio wave sensor is powered ON early to enable positioning before movement records are taken, then positioning can begin earlier, but power consumption increases
Solution Approach 1:
The positioning module is activated in advance before movement record acquisition begins. The system performs positioning operations preliminarily while the user is still preparing, so that position data is ready when recording starts, eliminating waiting time without requiring continuous operation during the entire preparation period
Solution Approach 2:
The positioning module operates periodically rather than continuously - it is turned ON to perform positioning, then turned OFF after completion or timeout. This periodic activation pattern reduces overall power consumption compared to continuous operation while still achieving early positioning preparation
2Reliability
If the satellite radio wave sensor is repeatedly started up and suspended to receive satellite radio waves, then positioning accuracy improves, but the start of movement record acquisition is delayed
Solution Approach 1:
The movement distance detection sensor acts as an intermediary indicator to infer positioning status. Instead of continuously checking satellite signal reception directly, the system uses movement distance data as a proxy - when the user has moved a certain distance, it suggests the positioning module may have successfully acquired satellite signals, triggering resumption of positioning operations
Solution Approach 2:
The system uses the user's own movement (detected by the movement sensor) to automatically trigger positioning resumption. The movement itself serves as the condition that activates the positioning module again, eliminating the need for manual intervention or continuous system monitoring
3Use of energy by moving object
If the satellite radio wave sensor is kept suspended to save power, then power consumption reduces, but positioning cannot begin when satellite radio waves become receivable
Solution Approach 1:
The system implements feedback through the movement distance detection sensor to monitor user movement and infer positioning status. This feedback mechanism allows the system to automatically adjust positioning module operation - when movement indicates the user has moved to a location where satellite signals might be available, the positioning module is activated again, creating a responsive adaptability loop
Data Source
AI summary
An electronic device including: a positioning module that performs positioning by receiving radio waves from navigation satellites; a movement distance detection sensor that detects movement distance; and a processor that turns on power of the positioning module and, if positioning with the positioning module has not succeeded after a first prescribed period of time has elapsed, turns off power of the positioning module, wherein if the processor detects that the movement distance detected by the movement distance detection sensor starting from when the positioning module was turned off is greater than or equal to a prescribed distance, the processor turns on power of the positioning module.