Wireless Sensor RF Power Adjustment for Battery Life
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Solution Overview
Problem
Wireless remote sensors consume excessive battery power due to fixed maximum RF transmission power levels, leading to reduced battery life, especially when some sensors are closer to the main control unit or experience environmental obstructions.
Innovation Solution
A system and method that dynamically adjusts the RF transmission power of wireless sensors based on communication parameters and environmental conditions, using a main control unit to regulate power levels, determining the necessary power for each sensor to optimize communication while minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If wireless sensors are factory programmed to maximum RF transmission power level to achieve maximum range, then transmission range is improved, but battery power consumption increases
Solution Approach 1:
The patent implements dynamic adjustment of RF transmission power levels based on actual communication needs. The sensor determines the minimum power level required to successfully transmit data to the control unit and adjusts accordingly, rather than operating at a fixed maximum power level. This dynamic adaptation resolves the contradiction by allowing the system to achieve maximum range when necessary while conserving battery power during normal operation.
Solution Approach 2:
The system changes the transmission power parameter based on environmental conditions and communication requirements. By monitoring transmission success and adjusting power levels, the system optimizes the balance between transmission range and power consumption, resolving the technical contradiction between these two parameters.
2Reliability
If all sensors transmit at the same factory-programmed RF power level, then communication reliability is maintained, but battery life is reduced due to unnecessary power consumption
Solution Approach 1:
The patent applies local quality by allowing each sensor to independently determine and use its own optimal transmission power level based on its specific location, environmental conditions, and communication requirements. Rather than uniform power levels across all sensors, each sensor adapts locally, maintaining communication reliability while minimizing individual power consumption to extend battery life.
Solution Approach 2:
The system uses feedback mechanisms where sensors monitor transmission success and adjust power levels accordingly. This feedback loop ensures communication reliability is maintained while avoiding unnecessary high-power transmissions, thereby extending battery life.
3Measurement precision
If RF transmission power is increased to overcome environmental obstructions and path losses, then signal quality is improved, but battery power consumption increases
Solution Approach 1:
The sensor dynamically adjusts transmission power in response to environmental conditions and signal quality requirements. When obstructions cause path losses, the system increases power only to the extent necessary to maintain signal quality, rather than operating continuously at maximum power, thus resolving the contradiction between signal quality and power consumption.
Data Source
AI summary
A system for RF transmission power adjustment in a wireless sensor is provided. The system includes a main control unit positioned within an environment. At least one sensor is positioned within the environment and constructed and arranged to monitor occurrences within the environment. The at least one sensor is in wireless communication with the main control unit. The at least one sensor sends signals to the main control unit indicative of the occurrences. The signals have communication parameters affected by an environmental condition of the environment. The main control unit regulates a RF transmission power of the at least one sensor based on at least one of an aggregate of communication parameters of the signal or the environmental condition.