Hybrid UAV Detection System Using Radar and Microphone Array
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Solution Overview
Problem
Existing flying object detection systems face challenges in accurately detecting unmanned aerial vehicles (UAVs) at distances beyond a predetermined range due to interference from other sound sources, leading to delayed detection and reduced user convenience.
Innovation Solution
A flying object detection system combining a microphone array for sound data collection and a radar for distance measurement, with a control device that processes sound data and distance information to display the object's position, enhancing detection accuracy and convenience by utilizing both sound and radar data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sound data collected by microphone array is used for detecting flying object, then detection can be performed in monitoring area, but detection accuracy deteriorates when flying object is beyond predetermined distance due to interference from other sound sources
Solution Approach 1:
The patent combines sound data from microphone array with image data from imaging device to create a hybrid detection system. The sound data processing unit processes acoustic information while the imaging device captures visual data, and the display unit integrates both data types to show flying object positions. This merging allows the system to detect objects beyond the limited sound-only range by compensating for sound data weaknesses with imaging data strengths.
Solution Approach 2:
The display unit acts as an intermediary that processes and integrates information from both sound data and imaging data. It converts both data types into visual representations on the same coordinate system, allowing operators to see combined detection results. This intermediary function resolves the contradiction by presenting unified detection information that overcomes the distance limitations of sound-only detection.
2Device complexity
If only sound data is used for detection, then system complexity is reduced, but early detection capability is lost when flying object is far from microphone array
Solution Approach 1:
The system performs preliminary detection using sound data from the microphone array, which has a larger coverage area. When sound data indicates a potential flying object, the system activates imaging data capture and processing in advance. This preliminary action using sound allows early warning before the object enters the more precise but limited-range imaging detection zone, reducing overall detection time without excessive complexity.
Solution Approach 2:
The detection system is segmented into two functional parts: sound data processing for early warning and broad coverage, and imaging data processing for precise identification and tracking. Each segment operates with appropriate complexity for its function, and they work in sequence or parallel depending on detection needs. This segmentation allows early detection capability while managing system complexity through functional division.
3Area of stationary object
If microphone array detects flying object at distance, then detection coverage is extended, but detection accuracy deteriorates due to influence of other sound sources
Solution Approach 1:
The patent merges sound data processing results with imaging device data in the display unit. The sound data provides broad area coverage and early detection capability, while the imaging data provides precise visual confirmation. By displaying both data types on the same coordinate system with integrated markers, the system achieves both wide coverage and high precision simultaneously, resolving the contradiction between coverage area and detection accuracy.
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
Enables early detection of UAVs regardless of the sound environment, improving user convenience by combining sound and radar data for accurate positioning and timely countermeasures.
Implementation Method 1
a radar configured to measure a distance to a flying object by detecting the flying object in flight in a second detection area of the monitoring area
Implementation Method 2
a microphone array configured to collect a sound in a first detection area of a monitoring area
Data Source
AI summary
A flying object detection system includes a sensor including a microphone array configured to collect a sound in a first detection area of a monitoring area, a radar configured to measure a distance to a flying object by detecting the flying object in flight in a second detection area of the monitoring area, and a control device configured to detect presence or absence of the flying object based on sound data on the sound in the first detection area collected by the microphone array, and configured to receive the distance to the flying object. The control device is configured to display information on a position of the flying object viewed from arrangement places of the sensor and the radar based on the distance to the flying object and a detection output of the flying object by the radar on a first monitor.