Object Detection Device Search Area Width Setting
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Solution Overview
Problem
Conventional object detection devices face a rise in false detection probability when signal power-to-noise power ratios are low, leading to erroneous detection of objects that are not the target.
Innovation Solution
An object detection device that includes a signal receiving unit, a search area width setting unit, a signal component selecting unit, and an object detecting unit, which calculates and sets a search area width based on detection information to select and combine signal components, thereby reducing false detection probabilities by refining the signal processing and detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple object detection devices synthesize reception signals to enhance detection probability, then detection accuracy improves, but false detection probability increases when signal power-to-noise power ratio is low
Solution Approach 1:
The invention divides the frequency spectrum into multiple search areas and selects signal components from specific frequency ranges. By segmenting the frequency domain and selectively combining signals from designated search areas, the system enhances detection accuracy while suppressing false detections through targeted signal processing rather than blind synthesis of all received signals.
Solution Approach 2:
The invention applies different processing strategies to different frequency ranges. By identifying local regions in the frequency spectrum that correspond to expected signal characteristics and applying selective combining only to those regions, the system maintains high detection accuracy for true objects while avoiding false detections from noise in other frequency regions.
2Measurement precision
If frequency components of reception signals are corrected corresponding to Doppler frequency before synthesis, then detection probability enhances, but system complexity increases when Doppler frequency is unknown
Solution Approach 1:
The invention performs preliminary analysis of received signals to estimate Doppler frequency characteristics before the main synthesis process. By preparing frequency correction information in advance based on signal characteristics, the system can accurately compensate for Doppler effects without requiring complex real-time calculations during the synthesis operation.
Solution Approach 2:
The invention dynamically adjusts frequency correction parameters based on the estimated Doppler characteristics of the received signals. By changing the correction parameters adaptively rather than using fixed complex processing, the system maintains high detection probability while controlling system complexity through parameter-based rather than structure-based solutions.
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
The solution effectively suppresses the increase in false detection probability even in low signal power-to-noise power ratio conditions by accurately setting search areas and combining signal components, enhancing the detection device's reliability and accuracy.
Implementation Method 1
a signal receiving unit for receiving a signal reflected by an object to be detected
Implementation Method 2
A Doppler frequency is generated corresponding to a relative velocity between an object detection device and an object to be detected. This Doppler frequency is included in reception signals of the plurality of object detection devices.
Data Source
AI summary
A search area width setting unit for setting a search area width having a frequency corresponding to a signal component of an object by using detection information of the object is included, and a signal component selecting unit determines a search area having the search area width set by the search area width setting unit and selects a signal component a frequency of which is included in the search area from each of a signal received by a signal receiving unit and signals received by object detection devices. As a result, an increase in the false detection probability of the object can be suppressed even in a case where the reception signals have low signal power-to-noise power ratios.