Pull-wire type angle measurement system

Abstract

A pull-wire type angle measurement system of the invention relates to the angle measurement system based on a high-precision pull-wire type encoded sensor and especially relates to an apparatus applying for indirect aim gun tube rotation angle measurement. A function of the system is that a rotation angle of a gun tube which projects on a horizontal plane is measured precisely and a backlash influence of a structure of the gun itself is eliminated under the condition that structure reconstruction is not performed on indirect aim gun equipment. The system is formed by a pull-wire length measurement mechanism, a resolving circuit and a calibration circuit. The pull-wire length measurement mechanism comprises a pull-wire type encoder, a fixing and guiding device and a horizontal measurement apparatus. The resolving circuit and the pull-wire type encoder carry out data communication through a RS422 interface. A core control chip of the resolving circuit is a microprocessor based on an ARM-Cortex3 core. The calibration circuit adopts an ARM-Cortex3 series microprocessor, is connected with the resolving circuit through an RS232 interface and comprises a group of operation keyboards and a display nixie tube.

Description

technical field [0001] The invention relates to an angle measurement system based on a high-precision wire-type coded sensor, in particular to a device for measuring the rotation angle of an indirect gun barrel. Its function is to accurately measure the rotation angle of the artillery barrel projected on the horizontal plane without structural modification of the indirect artillery equipment, and to eliminate the influence of the "empty back" of the artillery's own structure. Background technique [0002] A photoelectric encoder is a common sensor used to measure the rotation angle of a mechanism. When the sensor is used to measure the rotation angle of the cannon barrel, it is necessary to modify the cannon equipment and link the encoder with the cannon shaft. This method has a simple algorithm and high measurement accuracy, but the measuring equipment cannot be easily applied to the actual cannon. Realize the assessment of the artillery operation process. Another method ...

AI Technical Summary

Problems solved by technology

When the sensor is used to measure the rotation angle of the cannon barrel, it is necessary to modify the cannon equipment and link the encoder with the cannon shaft. This method has a simple algorithm and high measurement accuracy, but the measuring equipment cannot be easily applied to the actual cannon. Realize the assessment of artillery operation process

Another method with higher accuracy and simpler measurement method is to use the strapdown inertial navigation system, but this system is often used in aerospace and aviation equipment, which is expensive and not suitable for use in indirect artillery training

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