Vehicle Locating Unit Power Management Synchronization
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Solution Overview
Problem
The existing vehicle recovery system's power management techniques lead to increased battery drain when a vehicle equipped with a vehicle locating unit (VLU) moves out of the transmission range of a communication tower, as the VLU must wake up for longer periods to receive signals, resulting in inefficient power consumption.
Innovation Solution
A vehicle locating unit with improved power management that synchronizes wake-up and sleep modes to the communication source transmitting the strongest signal, using a signal strength monitoring subsystem to identify and store the identities of the two strongest communication sources and switch synchronization accordingly, ensuring efficient power usage while maintaining communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the VLU wakes up for longer periods to ensure signal reception when moving out of transmission range, then the reliability of receiving communication messages is improved, but the power consumption increases
Solution Approach 1:
The VLU performs preliminary actions by storing the identity and transmission timing information of communication towers before entering sleep mode. During wake-up periods, it only needs to check if the stored tower is transmitting, rather than searching for signals. This preliminary preparation enables the system to maintain reliable communication while minimizing wake-up duration and power consumption.
Solution Approach 2:
The system uses feedback from signal strength measurements to dynamically adjust its operation. When the VLU detects that the stored communication tower is still transmitting strong signals, it can enter sleep mode with confidence. If signal strength drops below a threshold during wake-up checks, the system extends wake-up periods or updates stored tower information, creating a feedback loop that balances reliability and power consumption based on actual conditions.
2Use of energy by moving object
If the VLU synchronizes wake-up mode to a single communication tower, then the power consumption is reduced by minimizing wake-up time, but the adaptability to move to different towers deteriorates
Solution Approach 1:
The system implements dynamic adaptability by allowing the VLU to update the identity of the stored communication tower based on signal strength measurements during wake-up periods. The system dynamically switches between synchronized operation (when a tower is reliably detected) and search mode (when the stored tower is no longer detectable), creating a dynamic balance between power efficiency and adaptability to changing environmental conditions.
Solution Approach 2:
The VLU employs periodic wake-up checks at scheduled intervals corresponding to the transmission cycle of the stored communication tower. During these periodic wake-up periods, the system verifies tower presence and updates its stored information if necessary. This periodic action maintains power efficiency through minimal wake-up time while periodically refreshing the system's adaptability to new tower configurations.
3Adaptability or versatility
If the VLU checks all communication towers continuously, then the adaptability to the strongest signal is improved, but the power consumption increases
Solution Approach 1:
The system performs preliminary comprehensive tower scanning and signal strength measurement during initial setup or when transitioning between locations. The results of this preliminary action are stored as the identity of the strongest signal tower. During normal operation, the VLU only needs to synchronize with this pre-identified tower, avoiding continuous comprehensive scanning and thereby reducing power consumption while maintaining adaptability to the strongest signal.
Solution Approach 2:
Instead of continuously checking all towers, the system performs periodic re-evaluation of tower signals at scheduled intervals. During these periodic checks, the VLU measures signal strengths and updates its stored tower identity if a stronger signal is detected. This periodic comprehensive check maintains adaptability to the strongest signal while consuming far less power than continuous monitoring.
Data Source
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AI summary
A vehicle locating unit with improved power management. A receiver receives a signal from a network of communication sources. A signal strength monitoring subsystem determines which of the communication sources are transmitting the strongest signals. A power management subsystem is responsive to the signal strength monitoring subsystem and is configured to alternatively enter sleep and wake-up modes, synchronize the wake-up mode to the communication source transmitting the strongest signal, and test the signal strength of at least one additional communication source according to a predefined sequence.