Vehicle Gateway Duty Cycling for Low-Power Asset Tracking
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Solution Overview
Problem
Vehicle gateways used for tracking assets consume excessive power, especially when operating on internal batteries, which reduces their efficiency and accuracy in scanning beacon signals from wireless tags.
Innovation Solution
The gateway dynamically adjusts its duty cycle based on available power sources, switching to a low power mode by altering the active and inactive periods to conserve energy, using a stepwise, linear, or exponential adjustment method, ensuring continuous asset tracking while prolonging battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the gateway operates continuously to track assets, then asset tracking accuracy is improved, but power consumption increases
Solution Approach 1:
The gateway dynamically adjusts its scanning duty cycle based on available power sources. When vehicle power is available, the gateway operates at full scanning capacity for accurate tracking. When battery power is detected, the gateway automatically reduces scanning frequency to conserve energy, creating a dynamic adaptation between power availability and operational intensity
Solution Approach 2:
The system changes the operational parameter (duty cycle percentage) based on power source conditions. The gateway monitors power availability and adjusts the scanning duty cycle parameter accordingly - operating at higher duty cycles when vehicle power is available and lower duty cycles when battery power is used, directly linking parameter changes to power consumption management
2Measurement precision
If the gateway uses high power mode, then scanning accuracy is improved, but battery life decreases
Solution Approach 1:
The gateway implements periodic scanning with variable duty cycles instead of continuous high-power operation. When battery power is available, the gateway performs scans at reduced frequency intervals, maintaining asset tracking capability while extending battery operational life. The periodic nature of scanning allows the system to balance accuracy requirements with energy conservation
3Ease of operation
If the gateway operates on internal battery, then portability is improved, but power availability decreases
Solution Approach 1:
The gateway monitors its own power source status and automatically adjusts its operational parameters without external intervention. When battery power is detected, the system self-regulates by reducing duty cycle to extend battery life. This self-service capability allows the portable gateway to adapt to power constraints independently, maintaining functionality while managing limited battery availability
Data Source
AI summary
A system includes one or more assets loaded into and/or removed from a vehicle. Each asset is coupled to a wireless tag, and each wireless tag wirelessly transmits beacon signals at predetermined intervals. The system includes a gateway disposed within the vehicle. The gateway is configured to receive power from a vehicle power source when the vehicle is operating, and the gateway is configured to receive power from an internal battery source when the vehicle is not operating. The gateway is configured to scan an area of the vehicle at a duty cycle to identify beacon signals transmitted by the wireless tags and receive the beacon signals from the wireless tags.