Radar Device Modulation Waveform Adjustment for Detection Accuracy
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Solution Overview
Problem
Radar devices face a decrease in detection accuracy due to deviations between the modulation cycle of the transmitted wave and the sampling cycle of the beat signal, leading to incorrect target detection.
Innovation Solution
A radar device with an adjusting unit that adjusts the modulation waveform of the transmitted wave to synchronize the sampling timing with the modulation cycle, preventing detection at incorrect positions and maintaining accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the radar device uses a fixed modulation cycle for the transmitted wave, then the system operation is simple, but detection accuracy decreases due to deviation between modulation cycle and sampling cycle
Solution Approach 1:
The patent applies dynamics by making the modulation waveform adjustable rather than fixed. The adjusting unit dynamically modifies the modulation waveform based on detected deviation between the modulation cycle and sampling cycle, allowing the system to adapt to timing mismatches and maintain detection accuracy without increasing overall system complexity
Solution Approach 2:
The patent implements feedback by using the detection unit to monitor target detection results and identify deviations between modulation and sampling cycles. This feedback information is then used by the adjusting unit to correct the modulation waveform, creating a closed-loop control system that maintains detection accuracy
2Reliability
If the radar device samples the beat signal without synchronizing to the modulation cycle, then the sampling operation is simple, but false detections occur at incorrect positions
Solution Approach 1:
The patent applies preliminary action by having the adjusting unit pre-adjust the modulation waveform before sampling occurs. By synchronizing the modulation cycle with the sampling cycle in advance, the system ensures that sampling happens at the correct timing positions, preventing false detections without complicating the sampling operation itself
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
Prevents a decrease in detection accuracy by ensuring the radar device samples the beat signal at the correct timing, effectively detecting targets at known positions while avoiding false detections at other positions.
Implementation Method 1
a transmitted wave of a modulation wave whose frequency changes cyclically
Implementation Method 2
a reflected wave which is the transmitted wave reflected by a target
Implementation Method 3
The radar device generates a beat signal by mixing the transmitted wave and the reflected wave
Data Source
AI summary
There is provided a radar device. A transmitting unit transmits a transmitted wave of a modulation wave whose frequency changes cyclically. A receiving unit receives a reflected wave which is the transmitted wave reflected by a target. A detection unit detects the target based on the reflected wave received by the receiving unit. An adjusting unit adjusts a modulation waveform of the transmitted wave transmitted from the transmitting unit such that the target provided at a known position as an object is detected by the detection unit at the known position and the target is not detected at positions other than the known position by the detection unit.