Star Arrow Locking Device Strain Monitoring System

Abstract

The invention is a strain monitoring system for a star-arrow locking device. Including: power supply module, conditioning module, acquisition module; the power supply module provides a linear regulated power supply for the system; the conditioning module forms the measured strain measurement point into a measurement bridge, provides a stable excitation voltage for the bridge, and differentials for the bridge The output is filtered, amplified, and output by the multi-channel switch for collection by the acquisition module; the acquisition module collects test data; among them, the conditioning module includes: excitation power circuit, strain test circuit, temperature compensation circuit, state monitoring circuit; the temperature compensation circuit uses precision resistors It forms a temperature-compensated half-bridge with temperature-compensated measuring points; the strain test circuit uses precision resistors and measured strain measuring points to form a measuring half-bridge; Differential amplification of the unbalanced voltage. The invention can still accurately test other strain measuring points when a short-circuit or open-circuit fault occurs at a certain strain measuring point.

Description

technical field [0001] The invention belongs to the precise measurement and on-line monitoring technology of the pretightening force of a locking tape during the docking process of a star and an arrow. Background technique [0002] In the field of aerospace, reliable connection and safe separation are realized between satellites and launch vehicles through connection and separation mechanisms. Due to the advantages of strong connection bearing capacity, high unlocking reliability, and small separation impact, most of the star-rocket connection and separation mechanisms of major launch vehicles in the world today use tape locking devices. The star-arrow connection and separation mechanism based on the tape locking device needs to apply precise and appropriate tape pre-tightening force to realize the reliable connection and safe separation of the star-arrow when the star-arrow is docked. Accurate measurement and on-line monitoring of tape preload, as a prerequisite for applyi...

AI Technical Summary

Problems solved by technology

In addition, during the process of transporting the tape with specific strain measuring points and completing the calibration to the shooting range, due to the harsh transportation environment, the function of a certain strain measuring point on the tape will inevitably be abnormal.

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