Real-time Acceleration Sensor Calibration for Vehicle Movement
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Solution Overview
Problem
Existing telematics technologies primarily focus on transmitting signals during vehicle crashes and lack effective real-time calibration methods for acceleration sensors, leading to distorted data due to improper mounting and external factors, which affects accurate measurement and analysis of driving behaviors.
Innovation Solution
A real-time acceleration sensor calibration apparatus and method that utilizes a processor, memory, and communicator to calibrate triaxial acceleration and angular velocity data from sensors and a gyroscope, performing primary and secondary transformations to align the acceleration data with the vehicle's actual movement, and transmitting calibrated data to a server for analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If real-time calibration is performed using multiple sensors and complex transformation algorithms, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The calibration process is divided into two distinct transformation stages: primary transformation that corrects sensor mounting errors, and secondary transformation that compensates for vehicle body movement. This segmentation allows each transformation to address specific error sources independently, improving calibration accuracy while making the complex calibration process more manageable and systematic.
Solution Approach 2:
The calibration apparatus integrates multiple sensor types (acceleration sensors and gyroscopes) and performs multiple functions (data acquisition, primary transformation, secondary transformation, and calibration) within a single system. This multi-functional approach consolidates what could be separate devices into one unified calibration system, improving measurement precision without proportionally increasing device complexity.
2Measurement precision
If multiple sensors are integrated for comprehensive data collection, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple acceleration sensors and gyroscopes into a single integrated calibration apparatus. By merging these sensors and their data processing functions into one unified system, the patent achieves comprehensive vehicle movement measurement while avoiding the complexity of coordinating separate independent systems. The merged apparatus processes all sensor data through a coordinated transformation algorithm.
Data Source
Figure 1
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Figure 2c
AI summary
Provided are a real-time acceleration sensor calibration apparatus for measuring a movement of a vehicle and an acceleration sensor calibration method, the acceleration sensor calibration apparatus including an acceleration sensor configured to measure a triaxial acceleration value, a gyroscope configured to measure a triaxial angular velocity value, an acceleration data calibrator configured to primarily transform a vector of the measured acceleration value using a gravity vector calculated based on the triaxial acceleration value and the triaxial angular velocity value measured by the acceleration sensor and the gyroscope, and a communicator configured to transmit information related to the movement of the vehicle to a server based on calibrated acceleration data.