An Image-Based High-Precision Barrel Angle Measuring Device

Abstract

The invention provides an image-based high-precision cylinder and bullet angle measuring device. A tail end reference leading-out device is installed on a bullet locking device at the tail end of a bullet body of the device, and used for leading out non-measurable reference on the two bullet bodies after a guide button is assembled. A bullet cylinder reference leading-out device is installed on the end face of a double-helix guide rail at the front end of the bullet cylinder, and is tightly attached to the inner side face of the double-helix guide rail through double pins installed on the bullet cylinder reference leading-out device, so that the bullet cylinder reference which is not visible in the bullet cylinder is led out. A single CCD is sequentially focused on the bullet cylinder reference leading-out device and the tail end reference leading-out device through a zoom lens, so as to obtain large and small photography measurement coded disc images. Coding line identifying angles onthe large and small photography measurement coded discs, point angle and point coordinates are extracted. Distortion elimination process is carried out, the rotation matrix before and after rotationof an angle point target through an optimal fitting method, and the initial angle of a missile directional navigation device can be accurately obtained.

Description

[0001] Technical field [0002] The invention is an image-based high-precision cylinder projectile angle measuring device, which belongs to the field of geometric quantity detection in the production of weapons and equipment, and can directly measure the rotation angle of a projectile body along a threaded track in a launch tube with a helical track. Background technique [0003] The projectile launch track with a helix can only be used after being placed for a long time, which requires the inertial navigation component to have an extremely low zero deflection rate. Affected by zero bias factors, the accuracy of long-term directional navigation devices such as fiber optic gyroscopes is not satisfactory. Before the weapon leaves the factory, from the perspective of the system, under the condition that the accuracy of the directional navigation device is certain, by reasonably establishing the error model of the accelerometer and gyroscope, and designing an effective filter, the...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is: in order to solve the problem of quickly and accurately measuring the initial angle of the navigation device, the present invention proposes an image-based high-precision cylinder bullet angle measuring device

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