Vehicle-Mounted RFID Power Mode Switching for Battery Drain Control

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Solution Overview

Problem

Vehicle-mounted RFID systems face challenges in power management, as they consume significant power from vehicle batteries, leading to battery drainage when the vehicle is stationary and the engine is off.

Innovation Solution

The implementation of a power-efficient RFID system that switches between high-power and low-power modes based on the vehicle's operating state, using a timer and sensors to determine when to switch modes and manage the charging of a backup battery.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the RFID system operates continuously in high-power mode to ensure continuous monitoring, then the monitoring reliability is improved, but the power consumption increases and battery life decreases

Engineering Contradiction:

Improvemonitoring reliabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The RFID system dynamically adjusts its power mode based on vehicle operating conditions. The controller switches between high-power mode (when the vehicle is moving or engine is running) and low-power mode (when the vehicle is stationary and engine is off), optimizing the balance between monitoring reliability and power consumption

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system uses periodic timer checks to determine when to switch power modes. A timer is initialized when switching to low-power mode, and the system periodically checks if the timer has expired or if motion/ignition events occur, creating a structured approach to power management that balances monitoring needs with energy conservation

Inventive Principle:

Principle #19Periodic action

2Use of energy by moving object

If the RFID system switches to low-power mode to conserve battery, then power consumption is reduced, but the monitoring capability may be interrupted

Engineering Contradiction:

Improvepower consumptionVSAvoidmonitoring capability

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The system continuously monitors vehicle motion status and ignition state through sensors and provides feedback to the controller. This feedback mechanism ensures that the RFID system switches to high-power mode immediately when motion is detected or the ignition is turned on, maintaining monitoring capability when needed while conserving power during stationary periods

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system switches to high-power mode in advance when motion is detected or ignition is turned on, ensuring that monitoring capability is restored before any potential RFID operations are needed. This preliminary action prevents monitoring interruptions by proactively adjusting power mode based on predicted operational needs

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12314798B2Methods, apparatuses, and systems for power control on vehicle mounted rfid system

Publication Date: 2025.05.27 INTERMEC IP CORP

AI summary

Vehicle mounted Radio Frequency Identification (RFID) systems and associated methods are provided. An example vehicle mounted RFID system is configured to operate an RFID system in a high-power mode. The example vehicle mounted RFID system is further configured to determine that an operating state of a vehicle switched from an active charging state to an inactive state. The example vehicle mounted RFID system is further configured to, in response to determine that the operating state of the vehicle switched from the active charging state to the inactive state, initialize a timer for a period of time. The example vehicle mounted RFID system is further configured to, in response to an elapse of the period of time, switch the RFID system to a low-power mode.