Supplemental Alert Generator for Fire Detection Retrofit
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Solution Overview
Problem
Existing smoke, fire, and carbon monoxide detectors often fail to effectively alert certain individuals, such as children, heavy sleepers, and the hearing impaired, due to inadequate audible alert signals, prompting the need for supplemental alert systems that can enhance detection and alerting capabilities.
Innovation Solution
A battery-powered supplemental alert generator is designed to be mounted near conventional detectors, operating in a low-power mode to monitor sound levels and analyze signals, generating supplemental alerts like a 520 Hz square wave or strobe light signals when standard alert patterns are detected, thereby increasing alert effectiveness and compliance with new regulations at a lower cost than replacing existing devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a high sound-level threshold (70-90 dB) is used to trigger analysis mode, then the device remains in low-power mode most of the time, but the device may fail to detect weaker alert signals from distant detectors
Solution Approach 1:
The device dynamically adjusts its operating mode based on detected sound levels. It transitions between low-power threshold monitoring mode and higher-power analysis mode, optimizing the balance between power consumption and detection reliability by only activating full analysis when necessary
Solution Approach 2:
The device performs preliminary threshold monitoring before committing to full analysis mode. By continuously monitoring sound levels against a preset threshold, it prepares for potential alert detection while maintaining low power consumption, only escalating to full analysis when the threshold is exceeded
2Measurement precision
If the device continuously analyzes audio signals to ensure accurate detection, then detection accuracy improves, but power consumption increases significantly
Solution Approach 1:
The device uses periodic threshold monitoring followed by conditional analysis. Instead of continuous analysis, it periodically checks sound levels and only performs detailed signal analysis when the threshold is exceeded, maintaining detection accuracy while reducing overall power consumption
Solution Approach 2:
The device performs partial analysis by first checking against a simple threshold criterion before committing to full signal analysis. This two-stage approach ensures accurate detection of true alerts while avoiding the power cost of continuous full analysis
3Reliability
If the device generates multiple types of supplemental alert signals (audio, visual, vibration), then alert effectiveness for vulnerable populations improves, but device complexity increases
Solution Approach 1:
The device is designed with multi-functionality to provide multiple types of alert signals (audio, visual, vibration) through a single integrated unit. This universal approach ensures effective alerting for various vulnerable populations while consolidating functionality rather than requiring separate devices
4Ease of manufacture
If the device is designed to retrofit existing detection systems, then cost of implementation decreases, but integration with existing systems increases complexity
Solution Approach 1:
The device extracts only the essential alert detection and supplementation functionality needed to work with existing detection systems. By focusing on the core function of listening for alert signals and generating supplemental alerts, it simplifies integration while maintaining retrofit cost-effectiveness
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The supplemental alert generator significantly enhances alert effectiveness for vulnerable populations by using low power consumption to operate for several years on standard batteries and can be easily retrofitted into existing systems, ensuring compliance with new standards while minimizing costs.
Implementation Method 1
a piezoelectric sensor is used to listen for the alert signal of the nearby detection/alert device
Data Source
AI summary
A battery-powered supplemental alert generator is disclosed that is adapted to be mounted in close proximity to, such as within 3 or 4 feet of, a conventional smoke, heat and/or fire detector/alert device. The supplemental alert generator operates in a relatively low power mode while listening for the nearby detector/alert device to generate a standard audible alert signal. Upon detecting that a monitored sound level has reached a particular threshold, the supplemental alert generator enters into a higher power analysis mode in which it analyzes the detected signal to assess whether it is an audible alert signal. If an audible alert signal is detected, the supplemental alert generator generates one or more supplemental alert signals, such as a 520 Hz audible square wave signal. The supplemental alert generator may be used to retrofit a house, hotel, or other building to comply with new standards or to otherwise increase the effectiveness of the existing detection/alert system.