Radar Sensor Motion Compensation for False Target Reduction
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Solution Overview
Problem
Radar sensors are prone to involuntary movements due to mechanical disturbances, leading to noise in the output signal and erroneous object detection.
Innovation Solution
An apparatus and method that utilize interface and processing circuitry to receive data indicating radar output and involuntary movement, modifying the signal based on motion sensor data to compensate for these movements, employing techniques such as Fourier transformations and machine-learning models to improve signal processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radar sensor is exposed to mechanical disturbance, then involuntary movement occurs, but noise in output signal increases and detection accuracy deteriorates
Solution Approach 1:
An accelerometer is introduced as an intermediary device mechanically coupled to the radar sensor. The accelerometer measures the involuntary movement of the radar sensor and provides this data to the processing circuitry, which then uses it to compensate for the movement-induced noise in the radar output signal.
Solution Approach 2:
The system implements a feedback mechanism where the processing circuitry receives movement data from the accelerometer, analyzes the radar output signal, determines movement-induced noise components, and subtracts these components from the original signal to generate a corrected output. This closed-loop feedback continuously compensates for sensor movement.
2Object-affected harmful factors
If conventional vibration compensation methods are used, then some noise reduction is achieved, but device complexity increases due to additional sensors and processing
Solution Approach 1:
The processing circuitry performs multiple functions: it processes the raw radar output signal, receives and processes accelerometer data, determines the relationship between sensor movement and signal distortion, and generates corrected output signals. This multi-functional approach consolidates several operations into a single processing unit, reducing overall system complexity.
Solution Approach 2:
The system uses the radar sensor's own movement data, captured by the coupled accelerometer, to compensate for its own performance degradation. The processing circuitry autonomously determines the movement-induced noise and corrects the signal without requiring external intervention or additional complex compensation mechanisms.
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
Reduces noise and false target detection, enhancing the accuracy and reliability of object detection by distinguishing between sensor movement and actual object motion.
Implementation Method 1
a motion sensor mechanically coupled to the radar sensor and configured to generate the second data based on the involuntary movement of the radar sensor
Implementation Method 2
The radar sensor is configured to emit radio frequency waves into a field of view of the radar sensor and generate the radar output signal based on received reflections of the emitted radio frequency waves
Data Source
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AI summary
An apparatus for compensating an involuntary movement of a radar sensor in a radar output signal of the radar sensor is proposed. The apparatus comprises interface circuitry configured to receive first data indicating the radar output signal of the radar sensor and receive second data indicating the involuntary movement of the radar sensor. The apparatus further comprises processing circuitry configured to modify the radar output signal based on the second data for compensating the involuntary movement in the radar output signal.