Bifurcated Processor Topology for Low-Power Hazard Detection
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Solution Overview
Problem
Hazard detection systems, especially those battery-powered, face challenges in managing power consumption effectively to support advanced features like vocal alarms, cloud communications, and device-to-device interactions, leading to increased power demands and reduced operational lifespan.
Innovation Solution
The implementation of a bifurcated processor circuit topology with a system processor for advanced functions and a safety processor for basic monitoring, combined with power gating and budgeting methods, minimizes power consumption while ensuring failsafe safety detection and user interface features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If advanced features (vocal alarms, cloud communications, device-to-device interactions) are added to hazard detection systems, then functionality and user interface capabilities are improved, but power consumption increases and operational lifespan decreases
Solution Approach 1:
The system is divided into two independent processors: a safety processor that handles only critical hazard detection functions, and a system processor that manages advanced features like vocal alarms, cloud communications, and user interface operations. This segmentation allows the safety-critical functions to operate with minimal power consumption while advanced features can be selectively enabled or disabled based on power availability, thus resolving the contradiction between functionality and power consumption.
2Device complexity
If a single processor handles both safety monitoring and advanced features, then device complexity is reduced, but power consumption increases and reliability may be compromised
Solution Approach 1:
The processor functions are segmented into two independent units: a safety processor dedicated exclusively to hazard detection and alarming, and a system processor for advanced features. This segmentation ensures that safety-critical operations have dedicated resources and cannot be compromised by power management decisions affecting advanced features, thereby maintaining high reliability while managing complexity through clear functional separation.
Solution Approach 2:
A power management module acts as an intermediary between the two processors and the power source. It monitors power levels and dynamically controls power distribution, enabling the system to maintain reliable safety monitoring even when power is limited by selectively powering down non-critical advanced features. This intermediary ensures that reliability is preserved while allowing flexible power management.
3Duration of action of moving object
If power gating is applied to reduce power consumption, then operational lifespan is extended, but response time for advanced features may increase
Solution Approach 1:
The power management system dynamically adjusts power gating decisions based on real-time conditions. When a hazard is detected or an advanced feature is actively used, the system temporarily increases power delivery to the system processor to ensure fast response times. During normal operation, power gating is applied to extend operational lifespan. This dynamic adaptation resolves the contradiction by optimizing both lifespan and response time based on system state.
Data Source
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AI summary
Hazard detection systems according to embodiments described herein are operative to provide failsafe safety detection features and user interface features using circuit topology and power budgeting methods that minimize power consumption. The safety detection features can monitor environmental conditions (e.g., smoke, heat, humidity, carbon monoxide, carbon dioxide, radon, and other noxious gasses) in the vicinity of the hazard detection system associated and alarm occupants when an environmental condition exceeds a predetermined threshold.