Moving object detection system, method, program, recording medium and radar

The moving object detection system uses digital beam forming to enhance radar accuracy by distinguishing moving objects from stationary ones and identifying highly reflective objects, addressing the limitations of conventional radar systems in detecting firearms and knives.

JP7743997B2Active Publication Date: 2025-09-25ALOUETTE TECH
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Patent Information

Application Number
JP2021055298
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2021-03-29
Publication Date
2025-09-25
Estimated Expiration
2041-03-29

AI Technical Summary

Technical Problem

Conventional radar systems face challenges in accurately detecting moving objects like firearms and knives due to fluctuations in reflection intensity caused by changes in distance and posture, environmental reflections, and the potential masking of metal objects by the human body, leading to reduced inspection accuracy and missed detections.

Method used

A moving object detection system utilizing a digital beam forming method with a transmitting unit and receiving unit to process millimeter waves, enabling high-frequency detection of moving objects by distinguishing them from stationary objects, measuring height and distance, and identifying highly reflective objects through signal processing.

Benefits of technology

The system improves detection accuracy by eliminating the need for mechanical scanning, enhancing sensitivity to reflected waves, and enabling rapid identification of dangerous objects like firearms and knives.

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Patent Text Reader

Abstract

To detect a dangerous article such as firearm and cutting instrument that moves together with a dynamic body.SOLUTION: A digital beam forming type detection system comprises: a transmission unit (6) which transmits a transmission wave (Tw) of a millimeter wave from at least one transmission antenna (16) toward a dynamic body (4); a reception unit (8) which receives a reflection wave (Rw) of the transmission wave by a plurality of reception antennas (20-1, 20-2 to 20-n) arranged in the one-dimensional direction or two-dimensional direction with respect to the dynamic body and generates a reception signal for each reception antenna; a detection processing unit (signal processing unit 10) which identifies the arrival direction and signal intensity of the reflection wave by obtaining a phase surface of the reflection wave with respect to an antenna surface of the reception antenna from a phase difference between the reception signals and executes any processing of discriminating between the dynamic body and a stationary object, measuring the dynamic body in the height direction, tracking the dynamic body, measuring a distance to the dynamic body from the reception antenna and specifying a high reflection object; and an information presentation unit (image display unit 12) which presents information expressing the dynamic body.SELECTED DRAWING: Figure 1
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Citation Information

Patent Citations

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    JP2018146249A

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