Radar Sensor Evaluation Device Fourier Transform Integration
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Solution Overview
Problem
Existing radar sensor evaluation methods struggle to maintain uninterrupted observation of surroundings over multiple measurement cycles due to pause times, leading to suboptimal Doppler resolution and signal-to-noise ratio (SNR).
Innovation Solution
The evaluation device performs Fourier transformations on signals from at least two measurement cycles, extending the integration time and enabling uninterrupted observation without reducing pause times or increasing sensor activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If measurement cycles are interrupted by pause times to prevent overheating, then sensor temperature is controlled, but integration time and observation continuity are reduced
Solution Approach 1:
The patent transitions from analyzing data within individual measurement cycles to performing Fourier transformations across multiple measurement cycles combined. By stacking and processing measurement data from multiple cycles in the frequency domain, the system achieves extended integration time equivalent to continuous observation, while maintaining the necessary pause times for thermal management.
2Temperature
If pause times between measurement cycles are maintained, then sensor overheating is prevented, but Doppler resolution and signal-to-noise ratio deteriorate
Solution Approach 1:
The patent combines measurement data from multiple interrupted measurement cycles into a unified dataset for Fourier transformation. By merging the spectral information from each cycle and performing a combined frequency analysis, the system achieves Doppler resolution equivalent to continuous measurement, despite the interruptions caused by thermal management pause times.
3Reliability
If measurement cycles are interrupted by pause times, then sensor reliability is maintained, but signal-to-noise ratio decreases
Solution Approach 1:
The patent achieves continuous spectral observation by performing Fourier transformations on combined data from multiple measurement cycles. The useful action of frequency analysis continues across the pause times by processing accumulated data, maintaining the signal-to-noise ratio that would result from uninterrupted measurement while allowing the sensor to cool down during the pause periods.
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 approach enhances Doppler resolution, increases SNR, and improves sensitivity and range of radar sensor evaluations, while maintaining pause times to prevent overheating.
Implementation Method 1
the electronic device is configured to perform the Fourier transformation with respect to a Doppler effect-relevant quantity using the evaluation signals derived from the measurement signals from at least two different measurement cycles
Implementation Method 2
perform the Fourier transformation with respect to a Doppler effect-relevant quantity
Data Source
Figure 1a~1b
Figure 1c
Figure 2
AI summary
The invention relates to an evaluation device (30) for at least one radar sensor (32) having an electronics device (36), which is designed to evaluate measurement signals (34) of the radar sensor (32), wherein the radar sensor (32) is designed to emit radar signals (12) during its measurement cycles and to receive radar signals (14) reflected by the surroundings of the radar sensor (32) and to output, as measurement signals (34), signals corresponding to the received reflected radar signals (14), while the radar sensor (32) remains inactive between two successive measurement cycles for a predefined pause time, and wherein the electronics device (36) is designed to carry out a Fourier transformation with use of measurement signals (34) from at least two different measurement cycles and/or with use of evaluation signals derived from the measurement signals (34) from at least two different measurement cycles. The invention additionally relates to a corresponding method for evaluating at least one radar sensor (32).