Sensor Frame Stabilization for Vehicle Cabin Vibration
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Solution Overview
Problem
The movement and vibration of vehicle cabins during driving, accelerating, and braking can impact the functionality of sensors such as cameras, radar-devices, and lidar-devices, due to their limited field of view and instability, which affects their performance.
Innovation Solution
A system comprising a sensor frame with inertial measurement units attached to both the sensor frame and the vehicle frame, along with a sensor frame actuator, stabilizes the sensor frame's orientation relative to the vehicle frame, ensuring consistent sensor positioning and improved field of view, especially during maneuvers like turning and breaking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sensors are mounted on the vehicle cabin to utilize its limited field of view, then the sensors can capture surrounding information, but the sensor functionality deteriorates due to cabin movement and vibration during driving maneuvers
Solution Approach 1:
The patent introduces an intermediary stabilization system between the moving cabin and the sensors. This system includes actuators that actively adjust the sensor frame position and inertial measurement units that detect movement, serving as a mediator to compensate for cabin instability and maintain reliable sensor functionality
Solution Approach 2:
The patent implements a dynamic stabilization approach where the sensor frame is not rigidly fixed but can actively adjust its position in response to detected movements. The system continuously monitors cabin motion and dynamically compensates to maintain sensor stability, transforming a static mounting problem into a dynamic control solution
2Measurement precision
If the sensor frame is stabilized in a gravitational reference system to keep orientation parallel to the road, then the sensor orientation is maintained on flat surfaces, but the stabilization fails when the vehicle is on slopes
Solution Approach 1:
The patent employs feedback control by using inertial measurement units to continuously detect the actual sensor frame orientation and comparing it with the desired orientation relative to the vehicle frame. The system then adjusts the sensor frame position based on this feedback, enabling accurate orientation maintenance both on flat surfaces and slopes by referencing vehicle geometry rather than gravity alone
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
This solution enhances the stability and accuracy of sensors, maintaining optimal orientation and field of view, even on slopes, thereby improving sensor functionality and reliability, particularly for radar and lidar-devices with small, elongated fields of view.
Implementation Method 1
a first inertial measurement unit attached to said sensor frame for determining a movement of said sensor frame
Implementation Method 2
a second inertial measurement unit arranged to be attached to said vehicle frame and for determining a movement of said vehicle frame
Implementation Method 3
arranged for stabilizing said sensor frame with respect to said vehicle frame based on said determined movements
Data Source
AI summary
A system for stabilizing one or more sensors on a vehicle having a vehicle frame is provided. This system comprises a sensor frame arranged for receiving one or more sensors and a sensor frame actuator, which attached to the sensor frame and to the vehicle. The system further comprises a first and a second inertial measurement unit. The first inertial measurement unit is attached to the sensor frame for determining a movement of the sensor frame. The second inertial measurement unit is attached to the vehicle frame for determining a movement of the vehicle frame. The sensor frame actuator is arranged for stabilizing the sensor frame with respect to the vehicle frame based on the determined movements.