Flash laser radar echo signal physical image simulation system and method

Abstract

The invention provides a flash laser radar echo signal physical image simulation system and method. The device used by the method comprises an emulation computer, a coarse control delayer, a laser, acoupling optical fiber, a beam splitter, an energy modulation module, a fine control delay module, a laser radar target point source generation computer, an image conversion module, an image recombiner and an optical projection module. The part of different simulation accuracy of the echo signal is separated, i.e. the distance of the laser radar and the target is simulated by the coarse control delay, and the detail presentation of the target in the distance dimension is simulated by the fine control delay. Each slice is two-dimensional and represents the echo image of the target under the distance. The MxN channel number matched with the image element number required by the conventional space domain is reduced to K channels of the time domain. High resolution and high integration can be met by using the micro-optical device in space and the structure is more compact.

Description

technical field [0001] The invention relates to a laser radar echo signal simulation system, in particular to a flash laser radar echo signal physical image simulation system. Background technique [0002] Lidar has begun to be widely used in various fields of the national economy such as geographic remote sensing, geological monitoring, unmanned driving, drones, and household appliances. In particular, the flash lidar has no scanning mechanism, and can capture and image the target at one time, and generate a three-dimensional image of "angle-angle-distance" or "coordinate X-coordinate Y-distance Z" after image processing. In order to be able to simulate the echo signal after the laser radar emits light waves interacting with the target in the laboratory, so that the flash laser radar can "see" a three-dimensional image, assuming that the laser radar has M×N pixels, it is necessary to completely simulate the laser radar The echo signal requires M×N channels, that is, each c...

AI Technical Summary

Problems solved by technology

With the development of high-speed APD array detectors, the scale of flash laser radar imaging pixels continues to increase, making it more and more difficult to simulate echo signals. The number of channels required is proportional to the size of the array, and the cost of echo signal simulation is increasing rapidly Increase

Images