Dynamic Power Management for Wireless Weighing Platforms
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Solution Overview
Problem
Current power consumption management for weighing systems, especially those with battery operation, faces challenges in reducing power usage during sleep modes, leading to shortened battery life due to ongoing CPU and peripheral circuit activity.
Innovation Solution
A dynamic power consumption management and wake-up method that employs a hierarchical approach, where the system enters shallow and deep sleep states, with the acceleration sensor independently powering the system upon detecting vibrations, effectively reducing power consumption by cutting off power to all components except the sensor during deep sleep.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the system uses traditional sleep mode with CPU in deep sleep state, then power consumption is reduced, but peripheral circuits still consume power and battery life is not significantly extended
Solution Approach 1:
The patent segments the system into two operational parts: an always-on acceleration sensor that detects vibrations, and the main system (CPU and peripheral circuits) that enters deep sleep mode. This segmentation allows the acceleration sensor to operate independently with minimal power consumption while the main system consumes negligible power during sleep, thereby significantly extending battery life.
Solution Approach 2:
The acceleration sensor serves as a self-wake mechanism that automatically detects vibrations and triggers system wake-up without requiring external intervention or continuous monitoring by the main system. This self-service approach eliminates the need for peripheral circuits to remain powered during sleep mode, reducing overall power consumption while maintaining responsive wake-up capability.
2Speed
If the system remains in power-on state to ensure quick response, then responsiveness is maintained, but power consumption increases and battery life is reduced
Solution Approach 1:
The acceleration sensor performs preliminary detection of vibrations continuously or at low power, preparing the system for quick wake-up without requiring the main system to remain powered. When vibration is detected, the system is already primed to wake up immediately, maintaining fast response speed while allowing the main system to enter deep sleep mode and consume minimal power.
3Use of energy by moving object
If the system uses multi-level sleep design with CPU in deep sleep, then some power saving is achieved, but wake-up still requires external operation and peripheral circuits maintain power consumption
Solution Approach 1:
The acceleration sensor acts as an intermediary component that bridges the gap between deep sleep mode and system wake-up. It continuously monitors for vibrations with minimal power consumption and serves as the trigger mechanism to wake up the main system, eliminating the need for external operations or complex wake-up sequences while maintaining ease of operation.
Data Source
AI summary
A method for dynamically managing power consumption, as well as a wake-up method, is disclosed for a wireless weighing platform. The method is initialized by setting both light and deep sleep period, entering a normal operating state, and starting light sleep timing. As long as no weighing operation is detected and the light sleep period has not expired, the method seeks to detect the weighing operation. If the light sleep period expires with no weighing operation, a light sleep state is entered, by turning off a communication function and starting timing for the deep sleep period. If no weighing is when the deep sleep period has expired, the wireless weighing platform enters a deep sleep state, by turning off power supply other than that for an acceleration sensor. If the acceleration sensor detects an effective vibration while in the deep sleep state, the normal operating state is restarted.