Scene foreign matter detecting system based on millimeter wave radar

Abstract

The invention discloses a scene foreign matter detecting system based on a millimeter wave radar. A millimeter wave integration receiving and transmitting subsystem is used for receiving a linear frequency modulation signal sent by an intermediate frequency subsystem and converting the linear frequency modulation signal into electromagnetic wavers for radiation; an echo signal is converted into an electric signal through the millimeter wave integration receiving and transmitting subsystem, and a first intermediate frequency signal is obtained after the echo signal and the linear frequency modulation signal are subjected to frequency mixing processing and is sent to the intermediate frequency subsystem; the intermediate frequency subsystem processes a source signal so that a needed linear frequency modulation signal can be obtained, and a second intermediate frequency signal is acquired after variable-frequency processing is performed on the first intermediate frequency signal and is input to a signal processing subsystem; the signal processing subsystem is used for performing signal processing on the second intermediate frequency signal so that the relative distance between foreign matter and the radar can be acquired; then the current antenna direction of the radar is acquired in real time through a servo subsystem; finally, the relation position between the foreign matter and the radar is acquired; the servo subsystem performs servo control for a rotating table where the radar is located. The system can emit a large-bandwidth signal and improve the range resolution.

Description

technical field [0001] The invention belongs to the technical field of radar systems, and relates to a scene foreign object detection system based on millimeter wave radar. Background technique [0002] The scene foreign object detection system mainly scans and detects the inherent targets of the scene, and discovers unknown foreign objects in time, so as to call the police in time and wait for processing. Among them, the real-time detection of foreign objects on the airport runway is particularly important. FOD airport runway foreign matter, ForeignObjectDebris, generally refers to some kind of foreign substance that may damage the aircraft or system. There are many types of FOD, such as aircraft and engine connector nuts, screws, washers, fuses, etc., machine tools, flying object nails, personal documents, pens, pencils, etc., wild animals, leaves, stones and sand, pavement materials, Blocks of wood, plastic or polyethylene materials, paper products, ice debris from oper...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a scene foreign object detection system based on millimeter-wave radar, which can solve the problems of difficult and low detection probability of foreign objects on the scene, realize the transmission of large bandwidth signals, and improve the distance resolution

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