Target detection method and device based on geometrical inversion array

Abstract

The invention discloses a target detection method and a target detection device based on a geometrical inversion array. A front detection and back end target inversion separation mode is adopted, a detection terminal adopts a single-sending multi-receiving array sensor / antenna, is in charge of the sending of ultra-wide band detection signals and the receiving of echo signals, detection and echo signals and the space coordinates of receiving and sending array elements are transmitted to a wireless moving terminal through a wireless module, relevant data is transmitted to a cloud operation server in charge of operation after the target inversion through a wireless or cabled network, a signal processing method is utilized for estimating the signal transmission time delay from the sending array element to each receiving array element, the space geometry principle is utilized for reckoning a plurality of target space positions in one step, and the inversion results are transmitted back to the detection terminal through a wireless module and are then displayed by a man-machine interaction interface. The device adopts ultra-wide bands for detecting signals, the front end detection and back end target inversion separation detection mode is adopted, the detection precision can be improved, the equipment complexity is reduced, the size and the weight of the equipment are reduced, and the manufacturing cost is reduced.

Description

technical field [0001] The invention relates to the technical field of ultra-wideband acoustic / electric wave detection, in particular to an ultra-wideband acoustic / electric wave detection method and device applied to target detection and defect target positioning. Background technique [0002] In the field of target detection, in order to improve the accuracy of target detection and the reliability of detection results, the current main research direction is to use phased array technology for front-end focusing and point-by-point scanning. This technology is widely used in radar and ultrasonic detection. In the detection technology based on phased array, the electromagnetic wave or ultrasonic wave generated by the coherent wave source has the same frequency and phase. The wave theory points out that the coherent wave will produce interference phenomenon in the medium, and the focus is achieved by forming a stable electric field or sound field. If the phase of the radio wave ...

AI Technical Summary

Problems solved by technology

In order to traverse the entire detection space, each array element needs to follow the focusing algorithm to perform multiple beam transmissions and echo receptions, resulting in long delays in target detection and high power consumption

[0007] (4) Using the principle of coherence for focusing inevitably has artifacts, which affects the accuracy of target detection

Sidelobe artifacts are also indistinguishable from hypoechoic signals with smaller amplitudes, reducing the resolution of the detection device for hypoechoic signals

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