Motorcycle Riding State Detection Using Single Acceleration Sensor
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Solution Overview
Problem
Existing motorcycle monitoring systems require multiple sensors and signal values, including angular velocities, to detect and differentiate between riding states, which complicates the implementation and accuracy of safety systems.
Innovation Solution
A method and apparatus using a single acceleration sensor at an arbitrary installation location to estimate and evaluate riding states by analyzing acceleration-relevant data, distinguishing between pre-crash, post-crash, and crash situations, and triggering emergency calls based on critical resting positions without the need for additional sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple sensors and signal values (including angular velocities) are used to detect riding states, then the accuracy of safety systems is improved, but the system complexity increases
Solution Approach 1:
The single acceleration sensor is designed to perform multiple functions: detecting longitudinal acceleration, transverse acceleration, and vertical acceleration components. By strategically positioning one sensor and utilizing its three-dimensional measurement capability, the system achieves comprehensive riding state monitoring without requiring multiple specialized sensors, thus resolving the contradiction between measurement accuracy and system complexity
Solution Approach 2:
The system transforms the acceleration sensor data by decomposing the acceleration vector into specific components (longitudinal, transverse, and vertical) through mathematical processing. This parameter transformation allows a single sensor to provide multiple measurement dimensions, achieving the accuracy equivalent of multiple sensors while maintaining system simplicity
2Device complexity
If a single acceleration sensor is used at an arbitrary installation location, then the device complexity is reduced, but the ability to accurately distinguish riding states may be compromised
Solution Approach 1:
The solution leverages the three-dimensional measurement capability of the acceleration sensor, utilizing all three orthogonal acceleration components (ax, ay, az) to reconstruct the motorcycle's riding state. By analyzing the vector composition and temporal patterns across all three dimensions, the system can accurately distinguish between different riding states even with a single sensor at an arbitrary location, thus maintaining measurement precision while reducing device complexity
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 simple and effective monitoring of motorcycle riding states, allowing for accurate detection of critical situations and timely emergency calls by utilizing a single acceleration sensor to estimate vehicle position and motion in three-dimensional space, reducing system complexity and improving safety responses.
Implementation Method 1
a sensor unit (12) detects acceleration-relevant data of the motorcycle and outputs them to an analysis and control unit (20)
Data Source
AI summary
A method and an apparatus for monitoring a motorcycle. Based on the acceleration-relevant data, a vehicle motion and a vehicle position in three-dimensional space are estimated. The vehicle position in space is analyzed and is evaluated as a normal or a critical riding state. A detection direction of a sensor unit is predefined in such a way that in an upright normal resting position of the motorcycle the detection direction lies in a horizontal plane, and the detected acceleration-relevant data encompass a first acceleration component in a longitudinal vehicle direction and a second acceleration component in a transverse vehicle direction. A riding state evaluated as critical is plausibilized with the estimated vehicle motion in order to recognize a critical resting position after an accident. An emergency call is generated when a critical resting position after an accident is recognized.