DEVICE FOR DETECTING INTRUDING OBJECTS, AND METHOD FOR DETECTING INTRUDING OBJECTS

摘要

Provided is a device for detecting intruding objects that enables the detection of intruding objects without requiring antenna switching. Delay units (102) use different delay amounts to delay signals received at each of a plurality of antennas (110). A signal synthesis unit (103) synthesizes the delayed signals. A frequency conversion unit (106) converts the synthesized signal frequency to a baseband. A wave detection unit (107) detects the signal that has undergone frequency conversion. A radar profile generation unit (104) uses the detected signal to generate a profile formed from the distance from the antenna, and the signal strength at each distance from the antenna. A detection processing unit (105) detects a peak in the profile at which the signal strength exceeds a preset threshold value, and determines whether an intruding object is present in a detection region on the basis of the detected peak.

主权项

1. An intruding object detection apparatus that detects intrusion of an object into a region for detection, the apparatus comprising:
an input section that receives signals reflected by a same object existing in the region for detection, using at least two respective antennas among a plurality of antennas; a delay section that delays the signals received respectively using the plurality of antennas using delay amounts that are different from each other; a combining section that combines the delayed signals; a frequency conversion section that frequency-converts the resultant combined signal into a baseband; a detection section that detects the frequency-converted signal; a generation section that generates a profile including distances from the antennas and signal intensity for each of the distances from the antennas using the detected signal; and a detection process section that detects a peak having the signal intensity exceeding a predetermined threshold in the profile and judges whether an intruding object exists in the region for detection based on the detected peak.