Life detecting device based on pseudocode phase-modulated continuous wave system

Abstract

The invention discloses a life detection device based on pseudocode phase modulation continuous wave system. The devices comprises the following steps: performing phase modulation on intermediate frequency signal by applying fake random encoded signal, then changing wave to microwave and amplify the microwave by power, radiated by transmitting antenna. Encoded signal entering into receiving antenna is amplified by low noise, two mixing and wave filtering and switched into stimulation baseband signal, translated into digital signal by high speed sampling, the digital signal is performed clutter cancellation, distance gate correlation, digital filtering by applying large-scale FPGA device, performs FFT switch in high speed DSP processor and adjudged, the result of judgment will be sent to terminal to display. The detection device can be used for discovering people located in the wall body or other barrier, and can measure the distance between people and detection device, provides convenience for search, rescue, thus the device has stronger anti-clutter and anti-background interference capability.

Description

technical field [0001] The invention belongs to the technology of life detection, in particular to a life detection device based on a pseudo-code phase-modulated continuous wave system. Background technique [0002] Civilian life detectors mainly detect people who are still or slightly moving behind walls, ruins or obstacles. This is a new type of detection equipment, which is mainly used in the following occasions: When there are hostages and kidnappers in the same room, it is necessary to know the location of the suspect and the hostage in the room and distinguish them, so as to facilitate hostage rescue ; When a sniper is hidden in a building and the police want to storm the building, it is necessary to determine the location of the sniper to avoid casualties; People who are still alive under the ruins; when used for military reconnaissance, it is hoped to know the arrangement of enemy personnel under the front bunker. Therefore, life detectors can play an important rol...

AI Technical Summary

Problems solved by technology

However, the patent uses multi-level high-order filtering, which takes a long time to detect, is easily disturbed by the external environment, and cannot determine the distance between the person and the detector.

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