Vehicle Sensor Assembly Self-Calibration for Flexible Installation
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Solution Overview
Problem
Existing sensor assemblies for vehicles require complex manual calibration and installation, making it difficult to position sensors accurately and efficiently, especially when multiple sensors are installed in different locations.
Innovation Solution
A self-calibration method that automatically determines the actual location and position of a sensor assembly using its own sensors, compares it to predefined setpoints, and outputs an error message if it doesn't match, allowing for easy installation and configuration of sensors as equivalent parts across various positions on a vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual calibration and installation methods are used for sensor assemblies, then installation precision can be achieved, but the complexity of the installation process and time consumption increase significantly
Solution Approach 1:
The sensor assembly performs self-calibration automatically after installation. The control unit executes a calibration routine that uses data from multiple sensors (acceleration, magnetic field, position sensors) to automatically determine the optimal calibration parameters without requiring manual intervention or precise pre-installation positioning.
Solution Approach 2:
The system stores multiple pre-defined calibration parameter sets corresponding to different installation positions and orientations. During installation, the system automatically selects and applies the appropriate pre-prepared calibration set based on the detected installation configuration, eliminating the need for time-consuming manual calibration procedures.
2Adaptability or versatility
If sensor assemblies are installed in arbitrary locations and positions, then installation flexibility improves, but ensuring accurate calibration and operation becomes more difficult
Solution Approach 1:
The sensor assembly is designed as a universal unit that can be installed in multiple locations and orientations on the vehicle. The control unit stores multiple calibration parameter sets that correspond to different installation configurations, allowing the same sensor assembly to be reliably calibrated regardless of its specific installation position.
Solution Approach 2:
The calibration process uses feedback from multiple sensors including acceleration sensors, magnetic field sensors, and position sensors to automatically determine the actual installation configuration and select or adjust the appropriate calibration parameters, ensuring accurate operation regardless of installation location.
3Adaptability or versatility
If multiple vehicle variable sensors are installed in different positions, then measurement coverage improves, but the complexity of calibration and coordination increases
Solution Approach 1:
Each sensor assembly operates as an independent, self-calibrating unit with its own control unit that stores calibration parameters specific to its installation location. This segmentation allows multiple sensor assemblies to be installed in different positions without requiring complex coordinated calibration, as each unit calibrates itself autonomously based on its local sensor data.
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
Simplifies the use of sensor assemblies by enabling automatic calibration and ensuring proper operation, allowing sensors to be installed in arbitrary locations and positions, reducing the risk of undesirable operation and facilitating maintenance.
Implementation Method 1
at least one acceleration sensor (12) designed as a three-axis sensor
Implementation Method 2
at least one magnetic field sensor (102)
Data Source
AI summary
A method for a sensor assembly of a vehicle that includes self-calibration of the vehicle variable sensor of the sensor assembly, the actual location and/or the actual position of the sensor assembly being automatically ascertained and compared with at least one setpoint location and/or setpoint position for the at least one operating routine of the sensor assembly. Outputting an error message if the actual location and/or actual position automatically ascertained does not essentially match any of the at least one setpoint locations and/or setpoint positions or if the actual location and/or actual position automatically ascertained does essentially match one of the at least one setpoint locations and/or setpoint positions then storaging the operating routine of the sensor assembly correlating to this setpoint location and/or setpoint position of the sensor assembly for a subsequent operation of the self-calibrated vehicle variable sensor of the sensor assembly.