Radar Device Pulse Width Segmentation for Distance Resolution
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Solution Overview
Problem
Conventional semiconductor radar devices face challenges in long-distance detection due to low transmission power and increased blind areas, which are exacerbated by the need for longer pulse widths, leading to reduced distance resolution and inhibited azimuth detection ranges when using pulse integration methods.
Innovation Solution
A radar device configuration that sequentially transmits multiple pulse signals of different widths, stores corresponding pulse reply data separately by detection distance, and performs pulse integration to generate radar images, allowing for efficient detection across various ranges without inhibiting azimuth coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If a single pulse signal with long pulse width is transmitted for long-distance detection, then the detection distance is improved, but the distance resolution deteriorates and blind area increases
Solution Approach 1:
The detection area is divided into multiple distance zones (short-distance area, middle-distance area, long-distance area), and different pulse width signals are assigned to each zone. This segmentation allows each pulse signal to be optimized for its specific detection range, improving both detection distance and distance resolution simultaneously.
2Reliability
If pulse integration is performed by sequentially transmitting multiple pulse signals for each detection distance group, then the signal-to-noise ratio is improved, but the azimuth detection range is inhibited
Solution Approach 1:
Pulse reply data from multiple transmitted pulse signals are stored in advance in a memory device before integration processing. This preliminary storage allows the integration to be performed without waiting for sequential transmission completion, enabling continuous azimuth scanning while maintaining signal-to-noise ratio through integration of multiple pulses.
3Reliability
If multiple pulse signals are sequentially transmitted and stored for pulse integration, then detection reliability is improved, but detection time is increased
Solution Approach 1:
The radar system continuously transmits multiple types of pulse signals (short, middle, long pulse widths) in sequence while simultaneously storing their reply data in memory. The pulse integration process continuously operates on stored data without interruption, maintaining continuous detection coverage across all distance zones and azimuth ranges, thereby improving detection reliability without significant time loss.
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 configuration enhances detection capabilities by maintaining azimuth resolution across all directions, preventing blind areas and improving signal-to-noise ratio, even with pulse integration, thereby enabling effective long-distance detection without compromising short-distance detection.
Implementation Method 1
a radar device for transmitting a pulse signal to a detection area and detecting a target object
Data Source
AI summary
This disclosure provides a radar device including a transmission module for sequentially transmitting two or more kinds of pulse signals having different pulse widths by a predetermined transmitting pattern, a memory module for storing a predetermined number of pulse reply data corresponding to each kind of the pulse signals, the predetermined number being number of transmissions of the kind of the pulse signals, a pulse integrating module for performing pulse integration of the pulse reply data stored in the memory module for each kind of the pulse signal, and an image generating module for generating a radar image using the results of the pulse integration.