Radar Sensor Arrangement with Central Signal Processing
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Solution Overview
Problem
Existing radar systems for motor vehicles are complex and costly, particularly when used for short-range applications due to the need for multiple units with digital signal processing capabilities, and face regulatory challenges due to their wide bandwidth, which complicates approvals and increases costs.
Innovation Solution
A radar system with a central signal generation and evaluation device connected to multiple transmitting and receiving devices via coaxial lines, using frequency multipliers and bandpass filters to generate and process radar waves with a narrower bandwidth, allowing for efficient detection of surroundings with reduced complexity and cost, and improved regulatory compliance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple independent radar units with digital signal processing capabilities are used for short-range detection, then detection coverage and accuracy are improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent combines multiple transmitting devices and receiving devices into a single radar sensor arrangement with one central signal processing unit. This merging approach maintains the detection capabilities of multiple units while eliminating the need for separate digital signal processing in each unit, thus reducing overall system complexity and cost.
Solution Approach 2:
The central signal processing unit serves as a universal processing center for all transmitting and receiving devices. It handles signal generation, signal reception, and signal evaluation for the entire radar arrangement, replacing the need for dedicated processing units in each individual sensor.
2Measurement precision
If ultra wideband radar signals with large bandwidth are used, then distance separation capability is improved, but regulatory approval becomes more difficult and costly
Solution Approach 1:
The patent changes the bandwidth parameter of the radar signals from ultra wideband to a narrower bandwidth. This parameter change maintains adequate distance separation capability while significantly improving the ease of obtaining regulatory approval, as narrower bandwidth signals face fewer regulatory restrictions.
3Adaptability or versatility
If multiple transmitting devices are used to monitor different sub-areas, then overall environment detection is improved, but the number of required units and system complexity increase
Solution Approach 1:
The patent merges multiple transmitting devices and receiving devices into a single integrated radar sensor arrangement. The multiple transmitting devices radiate electromagnetic signals in different directions to cover different sub-areas, and all signals are processed by a single central unit, eliminating the need for multiple independent radar units.
Solution Approach 2:
The radar arrangement segments the monitoring environment into different sub-areas, with each transmitting device responsible for a specific direction or region. This segmentation allows comprehensive environment detection while maintaining a unified system architecture with shared processing resources.
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
The system achieves effective detection of objects in both short and long-range applications with reduced bandwidth, simplifying design and approval processes, while maintaining high accuracy and separability, making it suitable for various driving scenarios including city traffic and parking.
Implementation Method 1
detecting the surroundings of a motor vehicle with electromagnetic signals, in particular with radar waves, which are sent with transmitting devices
Implementation Method 2
reflected on objects in the surroundings and then received
Data Source
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Figure 3
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AI summary
An arrangement for detecting the surroundings of a motor vehicle having at least two transmitting devices (S), which are disposed at a distance to one another, for transmitting electromagnetic signals, in particular radar waves, having at least one receiving device (E) for receiving the signals, which are reflected on at least one first object, having a signal generation and signal analysis device (Z) for generating the signals to be transmitted at a first frequency and for analyzing the signals to be received, and having at least one electrical line (12), via which the transmitting devices (S), the receiving devices (E), and the signal generation and signal analysis device (Z) are connected to one another.