Ultra-wide band imaging method and device with enhanced focusing

Abstract

The invention discloses an ultra-wide band imaging method and device with enhanced focusing. A controller FPGA (filed programmable gate array) 1 controls a time domain transmitter to transmits a narrow pulse signal with nanosecond width and high band-width frequency spectrum. The narrow pulse signal is radiated by a transmitting antenna array 12 to probe a target. A receiving antenna array transmits a received weak reflection signal to a noise amplifier 11, the amplified signal enters a receiver 7, the receiver 7 analyzes the received high-speed weak signal into a digital signal, and the digital signal is transmitted to a signal processing and imaging module 4 through a multi-channel data acquisition unit 10. In the mean time, the controller FPGA 1 controls an inertial positioning sensor 2 to measure acceleration of equipment in real time, a data acquisition unit 3 transmits the measuring result to the signal processing and imaging module 4, and the position of the target is analyzed through an imaging algorithm program.

Description

Technical field [0001] The invention relates to an imaging method and device, in particular to an ultra-wideband imaging method and device with enhanced focus. Background technique [0002] Ultra-wideband imaging instrument is a typical system that realizes the detection of concealed targets in non-transparent media barriers. It has the advantage of non-invasive detection. It can penetrate non-transparent media barriers such as walls and buildings, and detect hidden targets behind the barrier. Positioning, tracking and imaging. Due to its ultra-wideband and high-resolution features, ultra-wideband imaging instruments can obtain fine echo responses of complex targets, which is extremely beneficial for target recognition and target imaging. With the help of these excellent characteristics of ultra-wideband imaging equipment, it is possible to detect the location and movement of terrorist militants in hidden areas, and reduce the casualties of anti-terrorism personnel. In addition...

AI Technical Summary

Problems solved by technology

Existing equipment transmits a signal with a wider pulse and a longer wavelength. Although the penetration is good, the detection accuracy is low; the existing equipment transmits a signal with a long cycle, slow detection and imaging, and is not suitable for fast-moving objects; the existing equipment requires high-voltage power supply. Reaching dozens or even hundreds of volts, the power consumption is large, and the power supply has strong interference with the equipment; the existing equipment adopts the traditional imaging algorithm, the target positioning is slow, and the accuracy is low; the existing equipment has low circuit integration and large volume, which is not conducive to portability; Most of the existing equipment receivers use high-frequency microwave devices, the electromagnetic compatibility design is complicated, the cost is high, and the noise immunity is poor

Images