Design Of Distributed Space Measurement System

With the rapid development of science and technology today,the three-dimensional position monitoring of objects based on binocular vision is widely used in many industries such as military industry,transportation,and medical treatment.Therefore,it is of great significance to improve the measurement accuracy of the system.There are many factors that affect binocular vision measurement errors,such as camera pose,baseline length,and measurement distance.The baseline length is a key factor affecting the measurement accuracy of the binocular vision system.The longer the baseline length is,the higher the measurement accuracy is.The traditional binocular vision measurement system has a connecting device between the two cameras to fix the relative position of the camera.The connecting device limits the increase in the baseline length,thereby affecting the measurement accuracy of the system.This paper proposes a new type of distributed spatial measurement scheme.The relative position of the binocular vision camera is fixed by a precise camera pose calibration device.Meanwhile,there is no connection between the two cameras,and the baseline length can be flexibly controlled,thereby improving the measurement accuracy of the system.Based on the system scheme,a projectile explosion point detection system is designed.After the photodiode captures the light signal of the explosion point,the binocular camera is activated to capture images,and the left and right spatial position images are obtained respectively,and the bomb explosion is accurately calculated according to the binocular vision measurement principle position.The main work completed in this paper is as follows:1.Investigated the relevant research progress in the field of position measurement,proposed a measurement plan for the three-dimensional position information of the explosion point space of the distributed camera,studied the influence of the baseline length and the camera attitude angle measurement error on the system measurement accuracy,and established the consideration of the camera attitude Position measurement model for angular measurement error.2.According to the measurement model and error model of the system,completed the design of the mechanical structure and hardware circuit of the distributed space measurement system,including the design of the camera pose adjustment unit,the design of the trigger sensor unit,and the design of the calibration test unit.At the same time,the corresponding measurement software is designed according to the use requirements to assist in completing the measurement work.3.The experimental device for the three-dimensional position of the explosion point space of the distributed camera was built,the calibration experiment and the position measurement experiment were completed,and the measurement error of the system under different baseline lengths was analyzed.Under outdoor conditions,the calibration test unit designed in this paper was used to conduct position experiments.The experiments were respectively set at 24 m and 48 m from the detection system.Experimental results show that: at 24 m,the maximum measurement error was 15 mm,at 48 m,the maximum measurement error was 35 mm,and the system meets the measurement accuracy requirements.