CMOS Radar Sensor Integration for Adaptive Crash Structure Control
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Solution Overview
Problem
Existing safety systems for motor vehicles primarily adapt crash structures based on collision data from sensors after a collision has occurred, limiting the ability to pre-emptively optimize energy absorption and occupant protection.
Innovation Solution
Integration of highly integrated, high-resolution radar sensors using CMOS technology to provide advanced collision information, allowing for the pre-activation and optimization of adaptive crash structures before a collision, by determining the collision area, direction, and object shape, thereby enhancing energy absorption and occupant protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional radar sensors are used with integrated front-end electronics, then the sensor provides reliable collision detection, but the sensor size becomes large and bulky
Solution Approach 1:
The patent merges the radar antenna and front-end electronics into a single integrated module, eliminating the need for separate housing and reducing overall sensor size. This integration maintains full functional capability while achieving compact dimensions suitable for modern vehicle designs.
2Reliability
If crash structures are adapted after collision occurs, then the system responds to actual impact, but the ability to pre-emptively optimize energy absorption is limited
Solution Approach 1:
The system performs preliminary assessment of collision risk using radar data before impact occurs. Based on this early detection, crash structures are pre-positioned or pre-activated to optimize energy absorption, rather than waiting for the collision to occur. This reduces response time while maintaining accurate collision response.
3Measurement precision
If high-resolution radar sensors are integrated to provide advanced collision information, then collision prediction precision improves, but system complexity increases
Solution Approach 1:
The patent integrates the high-resolution radar sensor, evaluation unit, and crash structure control into a unified system architecture. This merging reduces the number of separate components and interfaces, thereby lowering system complexity despite the advanced capabilities of individual components.
4Object-affected harmful factors
If adaptive crash structures are used to optimize energy absorption, then occupant protection improves, but the device complexity increases
Solution Approach 1:
The crash structures are designed with adaptive characteristics that allow them to change their mechanical properties dynamically based on detected collision parameters. This enables optimization of energy absorption for different collision scenarios without requiring multiple separate structural systems, thereby limiting the increase in overall device complexity.
Data Source
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AI summary
A method for operating a safety system (15) of a motor vehicle (1) having at least one adaptive crash structure (13) designed to absorb energy in the event of a collision, wherein in advance of a detected, imminent collision, sensor data from at least one ambient sensor of the motor vehicle (1) are evaluated in order to ascertain a piece of collision information describing the collision, and the at least one crash structure (13) is adjusted on the basis of the piece of collision information, wherein the ambient sensor used is at least one radar sensor (2) having a radar transceiver (10) that is implemented as a semiconductor chip (8), particularly a CMOS chip, and whose sensor data are used to ascertain object information describing an external form, an extent and an orientation of a collision object (16) involved in the collision, wherein the object information is taken into account in order to ascertain a piece of collision information describing the region of impact and/or the type of impact.