Radar Self-Diagnostics Using a Fixed Field Marker
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Solution Overview
Problem
Current radar systems lack a comprehensive diagnostic method to detect malfunctions, particularly those that are difficult to predict during design, which can lead to undetected issues and potential hazards in critical applications.
Innovation Solution
A radar detection system that includes a marker within the field of view, which retransmits a diagnostic radar signal back to the transceiver, allowing for the processing unit to check for its presence in the signal, thereby indicating any malfunctions during transmission, reception, or signal conditioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If individual part checks are performed for radar diagnostics, then specific component functionality can be verified, but comprehensive malfunction detection cannot be ensured due to the large number of separate checks required and unexpected malfunctions that may be missed
Solution Approach 1:
A passive marker is introduced as an intermediary object in the radar field of view. The marker reflects radar signals back to the transceiver, serving as a mediator that enables comprehensive system diagnostics without requiring complex active testing equipment. This single intermediary object replaces numerous separate component checks, as any malfunction in the radar system will manifest as an abnormality in the reflected signal from the marker.
2Reliability
If multiple separate diagnostic checks are implemented, then coverage of known malfunction types improves, but detection of unexpected or unpredictable malfunctions remains insufficient
Solution Approach 1:
The diagnostic method using the passive marker is designed to be universally applicable to all radar system components. A single diagnostic approach can detect malfunctions in transmit antennas, receive antennas, transceiver units, and signal processing chains simultaneously. The marker-based reflection technique works regardless of the specific malfunction type, making the system adaptable to both known and unexpected failure modes without requiring multiple specialized diagnostic procedures.
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 method effectively recognizes various types of malfunctions by using the same processing techniques as target detection, ensuring that fault conditions are unlikely to be missed, and allows for timely diagnosis and prevention of radar system failures.
Implementation Method 1
the marker is impinged upon by the signal transmitted in the environment, it retransmits a specific diagnostic radar signal, as a function of the one it has received, back to the radar transceiver
Data Source
AI summary
A radar system may include: a transceiver configured to transmit a first radar signal into a field of view and to receive a second radar signal from the field of view; a processing unit configured to process the second radar signal, to generate a detection track, given by a signal amplitude distribution as a function of distance from the transceiver, and to detect presence of targets in the field of view from the generated detection track; and a marker located in the field of view, wherein the marker is arranged in a fixed position relative to the transceiver and wherein the marker is configured to receive the first radar signal and to transmit a diagnostic radar signal toward the transceiver as a function of the first radar signal. The processing unit may be further configured to store a predetermined diagnostic track, including at least a characteristic distance and signal amplitude.