Wireless Piezoelectric Indicator for Smoke Detectors
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Solution Overview
Problem
Existing smoke detectors lack the capability to communicate electromagnetic signals when detecting hazardous conditions, limiting their ability to alert management systems and potentially leading to casualties in building fires.
Innovation Solution
A wireless indicator device is added to smoke detectors, comprising a piezoelectric sensor, charge manager, processor, and transceiver, which converts audible alarms into electrical signals and transmits wireless alerts when a threshold is reached, enabling communication with management systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a smoke detector is equipped with only audible alarm capability, then the device complexity is low, but the ability to communicate hazardous conditions to management systems is insufficient
Solution Approach 1:
The patent combines multiple functions into a single integrated device: the smoke detector, piezoelectric sensor, charge manager, processor, and transceiver are merged into one unit. This allows the device to perform both audible alarming and wireless communication of hazard conditions, resolving the contradiction between reliability improvement and device complexity by consolidating components rather than adding separate systems.
Solution Approach 2:
The smoke detector is designed with multi-functionality, serving both as a traditional audible alarm device and as a wireless communication node that can alert management systems and mobile devices. The piezoelectric sensor captures ambient sound (including the alarm itself), the processor analyzes the signal, and the transceiver transmits data, enabling the single device to fulfill multiple safety functions simultaneously.
2Loss of information
If a wireless communication system is added to smoke detectors, then the ability to transmit alarm signals to management systems is improved, but the device complexity increases
Solution Approach 1:
The piezoelectric sensor serves a dual purpose: it can detect external vibrations and also capture the sound of the alarm itself. The system uses the alarm's own acoustic output as the detection signal, eliminating the need for separate detection and communication hardware. This self-service approach reduces overall system complexity while maintaining full communication capability.
Solution Approach 2:
The processor acts as an intermediary between the piezoelectric sensor and the transceiver. It receives the electrical signal from the sensor, analyzes whether it represents a true alarm condition by comparing against threshold values, and then triggers the transceiver only when necessary. This intermediary processing layer reduces unnecessary transmissions and simplifies the control logic.
3Adaptability or versatility
If a piezoelectric sensor and charge manager are added to enable wireless communication, then the alarm signal transmission capability is improved, but the manufacturing complexity increases
Solution Approach 1:
The wireless indicator device is designed as a separate, modular component that can be attached to existing smoke detectors. By segmenting the communication functionality into a distinct module with its own piezoelectric sensor, charge manager, processor, and transceiver, the system maintains ease of manufacture for both the traditional detector and the wireless add-on, while achieving full communication capability when combined.
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
Enables the detection of hazardous conditions to be communicated to management systems, potentially reducing casualties by providing timely alerts and notifications.
Implementation Method 1
a piezoelectric sensor configured to generate a first electrical signal upon detection of a vibration from a detector
Data Source
AI summary
An apparatus includes a piezoelectric sensor, a charge manager, a processor, and a transceiver. The piezoelectric sensor is configured to generate a first electrical signal upon detection of a vibration from a detector. The charge manager is configured to receive the first electrical signal and to generate a second electrical signal if it is determined that the first electrical signal is above a threshold. The processor is configured to receive the second electrical signal and to provide an instruction to transmit an alarm signal based at least in part on receipt of the second electrical signal. The transceiver is configured to receive the instruction and to transmit the alarm signal.