Modular Communication Card Removal Detection in Utility Meters
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Solution Overview
Problem
There is no automated mechanism to detect when a modular communication card is removed from a utility meter, leading to potential communication disruptions and tampering, which can result in inaccurate billing and unreported resource consumption.
Innovation Solution
An alert system integrated into the modular communication card that includes an electrical energy storage device, detection circuit, and decision engine to detect power loss and determine if the card has been removed, enabling it to transmit an alert indicating its removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a modular communication card is used in a utility meter, then the adaptability and upgradeability of communication technologies is improved, but the ability to detect card removal is worsened (no automated detection mechanism exists)
Solution Approach 1:
The patent implements a feedback mechanism where the modular communication card continuously monitors power signals from the utility meter and automatically transmits removal alerts to the headend system. This closed-loop detection system resolves the contradiction by providing automated feedback when the card is removed, thereby improving reliability without compromising adaptability.
Solution Approach 2:
The communication card performs self-detection of its own removal status by monitoring power signals and autonomously generating alerts. This self-service capability eliminates the need for external detection mechanisms, resolving the technical contradiction while maintaining system simplicity and adaptability.
2Reliability
If the communication card monitors power signals continuously, then the reliability of removal detection is improved, but the energy consumption increases
Solution Approach 1:
The patent employs periodic sampling of power signals rather than continuous monitoring. The card checks power signals at predetermined intervals and triggers alert transmission only when removal is detected, thereby maintaining high detection reliability while significantly reducing average power consumption compared to continuous monitoring.
Solution Approach 2:
The alert transmission uses a low-power radio frequency message that is transmitted briefly and then the card enters a low-power state. This approach accepts limited transmission duration and energy expenditure in exchange for maintaining reliable detection capability, effectively resolving the energy-reliability trade-off.
Data Source
AI summary
Techniques described enable a modular communication card to alert of its removal from a device. A method described herein includes monitoring, at a modular communication card for sending communications from a utility meter, a power fail signal received from a card of the utility meter. According to the method, the modular communication card monitors a power supply signal that supplies power to components of the modular communication card while the modular communication card is installed on the utility meter. The method includes detecting a change in the power fail signal, indicating a loss of power. The method further includes detecting that the power supply signal is outside an operational voltage range. The method further includes, responsive to the change and the power supply signal being outside, determining that the modular communication card has been removed from the utility meter. Additionally, the method includes transmitting an alert indicating the removal.