Radar Sensor Adaptive Sensing Rate for Detection Resolution
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Solution Overview
Problem
Conventional sensing devices cannot simultaneously achieve high detection resolution for object motion and wide detection range, as they use the same sampling signals for both long-range and short-range detection, limiting the ability to set detection range and resolution appropriately for both.
Innovation Solution
A sensing method that uses a first sensor signal for presence detection and a second sensor signal with a higher sensing rate for motion detection, allowing for adjustable detection resolution and switching between presence and motion detection modes based on object presence or absence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the same sampling signals are used for both long-range and short-range detection, then the detection resolution is the same for both modes, but the detection range and detection resolution cannot be simultaneously optimized
Solution Approach 1:
The patent divides the detection process into two independent sensing modes: first sensing for presence detection and second sensing for motion detection. Each mode uses its own dedicated sampling signals (first sampling signals and second sampling signals respectively), allowing independent optimization of detection parameters for each function without compromise.
Solution Approach 2:
Different sampling signals with different characteristics are applied to different detection tasks. The first sampling signals are optimized for presence detection in the detection area, while the second sampling signals are optimized for motion detection with higher resolution requirements. This local optimization allows each detection function to have the exact signal characteristics it needs.
2Measurement precision
If the sensing rate is increased to improve detection resolution for motion detection, then the detection resolution improves, but the power consumption increases
Solution Approach 1:
The system performs sensing operations periodically rather than continuously at high rate. The controller executes first sensing at a first sensing rate for presence detection, and only executes second sensing at a higher second sensing rate when motion detection is required. This periodic activation of high-rate sensing only when needed reduces overall power consumption while maintaining high resolution capability when required.
Solution Approach 2:
The sensing rate is made dynamic and adaptive rather than fixed. The system automatically adjusts which sensing mode to use and at what rate based on the detection requirements. The controller can switch between first sensing and second sensing, and adjust sensing rates dynamically, allowing the system to optimize between power consumption and detection resolution based on actual operational needs.
Data Source
AI summary
A sensing method includes: (a) performing first sensing to detect presence or absence of the object in a specific detection area using a first sensor signal received by a radar sensor from the specific detection area; (b) when the presence of the object in the specific detection area is detected by the first sensing in (a), continuing the first sensing and performing second sensing to detect a motion of the object using a second sensor signal transmitted from the radar sensor to the specific detection area, the second sensor signal having a sensing rate higher than a sensing rate of the first sensor signal; and (c) when the absence of the object in the specific detection area is detected by the first sensing in (b), stopping the second sensing and continuing the first sensing.