Smoke Detector UI with Single-Color LED and Piezo Buzzer

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Solution Overview

Problem

Traditional smoke detectors have limited functionality and user interfaces, lacking advanced notification systems for various modes and network configurations, which can lead to inadequate alerting and maintenance management.

Innovation Solution

A smoke detector with a processor-connected piezo buzzer and single-color visual indicator providing distinct notifications through audio tones and illuminations for different modes, including alarm, maintenance, and network configuration, utilizing pulse width modulation for varied tones and durations, and button actuation for mode-specific actions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple notification methods (audio tones, visual indicators) are implemented for different modes, then notification effectiveness is improved, but device complexity increases

Engineering Contradiction:

Improvenotification effectivenessVSAvoiduser interface complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The notification system is segmented into distinct audio tones and visual indicator patterns, where each mode (alarm, maintenance, network configuration) has its own unique combination of audio and visual signals. This segmentation allows clear differentiation between modes while using a unified hardware foundation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A single color visual indicator is designed to perform multiple functions by varying its illumination patterns (different blink rates, continuous on/off cycles) to indicate different modes and states. This universal indicator replaces the need for multiple separate LEDs, reducing hardware complexity while maintaining notification effectiveness.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Device complexity

If a single color visual indicator is used instead of multiple indicators, then device complexity is reduced, but information transmission capability is worsened

Engineering Contradiction:

Improvehardware reductionVSAvoidnotification differentiation

Core Design Contradiction:

Device complexityVSLoss of information

Solution Approach 1:

The single color visual indicator uses periodic action with different blink rates and illumination patterns to convey different information. For example, rapid blinking may indicate alarm mode, slow blinking may indicate maintenance mode, and specific on/off cycles may indicate network configuration mode. This temporal coding allows a single indicator to transmit multiple distinct messages.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The visual indicator communicates different information by changing its operational parameters such as blink rate, illumination duration, and off-duration. By varying these parameters, the single indicator can distinguish between multiple modes and states, compensating for the reduction in physical indicator数量.

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If pulse width modulation is used for piezo buzzer control, then notification variety is improved, but control complexity increases

Engineering Contradiction:

Improvenotification varietyVSAvoidcontrol circuit complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The piezo buzzer control uses dynamic parameter adjustment through pulse width modulation, where the duty cycle varies to produce different tones and notification patterns. This dynamic control allows a single piezo buzzer to generate multiple distinct audio notifications, replacing the need for multiple physical buzzers or speakers.

Inventive Principle:

Principle #15Dynamics

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

Enhances alert effectiveness by providing clear, mode-specific notifications and network coordination, simplifying user interaction and maintenance through a cost-effective, reduced-hardware user interface.

Implementation Method 1

a piezo buzzer

Methodology Applied

Scientific EffectPiezoelectric effect: Piezoelectric Effect

Implementation Method 2

a single color visual indicator

Methodology Applied

Scientific EffectElectroluminescence: Electroluminescence

Data Source

PatentUS11158178B2User interface for network capable smoke detector

Publication Date: 2021.10.26 KIDDE FIRE PROTECTION LLC

AI summary

An example smoke detector includes a smoke detection circuit operable to detect smoke, a piezo buzzer, a single color visual indicator, and a transceiver operable to communicate with at least one other smoke detector. A processor is operatively connected to the smoke detection circuit, piezo buzzer, single color visual indicator, and transceiver. The processor is operable to provide distinct notifications for each of a plurality of modes of the smoke detector including at least one alarm mode that indicates detected smoke, at least one maintenance mode that indicates a maintenance condition of the smoke detector, and at least one network configuration mode. Each notification includes one or more audio tones from the piezo buzzer, one or more illuminations of the single color visual indicator, or a combination thereof.