Wireless Sensor Backup Power for Hibernation
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Solution Overview
Problem
Conventional wireless sensing systems with zinc-carbon batteries or low self-discharge batteries face continuous power consumption even in hibernation mode, reducing their operational lifespan due to the incessant operation of the step-up transformer.
Innovation Solution
A wireless sensing system with a control unit, backup power unit, and wake-up unit, where the backup power unit supplies electricity to maintain basic functions during forced shutdown, and the wake-up unit manages power supply to minimize consumption and extend operational time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the system enters hibernation mode to reduce power consumption, then battery life is extended, but the step-up transformer continues to consume electricity incessantly
Solution Approach 1:
The power supply system is segmented into two independent power sources: the main power supply unit for high-power operations and the backup power unit for low-power standby operations. This segmentation allows the system to use only the necessary power source at any given time, eliminating the incessant power consumption of the step-up transformer during hibernation while maintaining essential functions.
Solution Approach 2:
The system changes the power supply parameters by switching between main power supply and backup power supply based on operational state. During hibernation, the system transitions from main power supply (with active step-up transformer) to backup power supply (with passive or minimal-power step-up transformer), fundamentally altering the power consumption characteristics while maintaining system functionality.
2Reliability
If the step-up transformer stays in working stage to supply power, then system functions are maintained, but electricity consumption is incessant
Solution Approach 1:
The power supply functionality is segmented between main power supply unit and backup power supply unit. The backup power unit's step-up transformer is designed to operate passively or with minimal power consumption during standby, separating the power transformation function from the main power consumption path and enabling energy-efficient operation during hibernation.
Solution Approach 2:
The backup power unit uses a passive or low-power step-up transformer that can operate indefinitely with minimal energy input. This 'cheap' in terms of energy consumption backup mechanism provides continuous essential power without the high energy cost of the main transformer, effectively disposing of the need for incessant main transformer operation during standby periods.
Data Source
AI summary
A wireless sensing system includes a power supply unit, a control unit, a backup power unit, and a wake-up unit. The control unit includes a microprocessor. The microprocessor acts according to a forced shutdown instruction and transmits the forced shutdown instruction to the wake-up unit through an internal control pin in order for the wake-up unit to generate a forced shutdown clock matching the forced shutdown instruction, transmit the forced shutdown clock to the power supply unit, and thereby stop the power supply unit from generating electricity, and for the backup power unit to transmit the electricity stored therein to the wake-up unit and thereby enable the wake-up unit to maintain its basic electrically driven functions. The backup power unit can supply a small amount of electricity to sustain the basic electrically driven functions of the system.