Accelerometer-Based Deceleration Detection System
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Solution Overview
Problem
Current methods for detecting vehicle deceleration, such as using GPS or speedometers, are inadequate for timely and accurate detection of small speed changes and often require expensive equipment, while existing brake light systems require complex installation and direct connection to the vehicle's electrical system.
Innovation Solution
A self-contained system using an accelerometer, power supply, and processing unit, separate from the vehicle's brake light system, which includes a signal filter and light controller to detect acceleration events and illuminate LEDs when deceleration exceeds a predetermined threshold, allowing for easy installation and accurate deceleration detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS or speedometer methods are used to detect vehicle deceleration, then deceleration detection capability is provided, but measurement precision and response time are inadequate for small speed changes
Solution Approach 1:
The patent replaces GPS and speedometer-based deceleration detection with an accelerometer-based system. The accelerometer directly measures acceleration forces, providing superior precision and response time for detecting small speed changes compared to position-based or speed-based measurement methods.
Solution Approach 2:
The system changes the measurement parameter from position/speed (GPS, speedometer) to acceleration force (accelerometer). This parameter change enables more sensitive and timely detection of deceleration events, as accelerometers can detect even minor changes in motion state immediately.
2Measurement precision
If accelerometer-based deceleration detection is implemented, then measurement precision and response time are improved, but device complexity and installation difficulty increase due to electrical system integration requirements
Solution Approach 1:
The patent segments the deceleration detection system into a standalone unit with its own power supply, accelerometer, processing circuitry, and LED indicator. This self-contained module can be installed independently without integrating with the vehicle's existing electrical system or brake light circuitry, thereby reducing installation complexity.
Solution Approach 2:
The patent introduces a self-contained accelerometer-based detection unit as an intermediary system that operates independently between the driver's braking action and the visual warning to following drivers. This intermediary approach avoids the need to tap into or modify the vehicle's internal electrical systems.
3Ease of operation
If standard brake light systems are used, then deceleration signaling is provided, but installation complexity increases due to direct connection requirements with the vehicle's brake light system
Solution Approach 1:
The patent extracts the deceleration detection and signaling function from the vehicle's existing brake light system. By creating a separate, self-contained unit with its own power supply and LED indicator, the system can be installed without modifying or connecting to the vehicle's internal brake light circuitry.
Solution Approach 2:
The patent implements a self-service system where the accelerometer-based detector includes its own power supply, signal processing circuitry, and indicator lights. This self-sufficient design eliminates the need for external electrical connections to the vehicle's brake light system, greatly simplifying installation.
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 accurate and timely detection of vehicle deceleration without complex installation, using a separate system that effectively filters noise from acceleration data to illuminate LEDs only when significant deceleration occurs, improving safety without requiring direct connection to the vehicle's electrical system.
Implementation Method 1
an accelerometer, a power supply, a light, and a processing arrangement all carried by or coupled to a housing
Implementation Method 2
The processing arrangement includes a signal filter configured to process signals received from the accelerometer
Implementation Method 3
a light controller configured to deliver power from the power supply to the light based on the accelerometer signals processed by the signal filter
Data Source
AI summary
A system for detecting vehicle deceleration having an accelerometer, a processing arrangement, and a deceleration indicator. The processing unit samples data from the accelerometer, and based on that data, determines if the vehicle is braking or otherwise decelerating. If the vehicle is braking or otherwise decelerating in excess of a threshold, the deceleration indicator is activated.