Non-contact measuring method for axial and radial deformation quantities of explosive columns under temperature loading condition

Abstract

The invention discloses a non-contact measuring method for axial and radial deformation quantities of explosive columns under a temperature loading condition. The non-contact measuring method includes: axial dimension change measurement of a plurality of the explosive columns and radial dimension change measurement of a signal explosive column. The non-contact measuring method for the axial and radial deformation quantities of the explosive columns under the temperature loading condition is applicable to non-contact real-time measurement of axial deformation quantities of a plurality of explosive column samples and the radial deformation quantity of the single explosive column. Compared with the prior art, the non-contact measuring method solves the problems that the axial deformation quantities of the plurality of explosive columns cannot be measured at the same time and the radial deformation quantity of the single explosive column cannot be detected in real time, and test precisionmagnitude of the non-contact measuring method is increased from 0.01mm to 0.001mm.

Description

technical field [0001] The present invention relates to a non-contact measuring method for axial and radial deformation under temperature loading conditions, in particular to a non-contact measuring method for axial and radial deformation of explosive grains under temperature loading conditions, which is suitable for explosive grains Real-time detection of changes in the axial and radial dimensions of the grain column under high and low temperature cycles and impact conditions. Background technique [0002] The ambient temperature will change the axial and radial dimensions of the explosive grains loaded in the ammunition, even irreversibly. Under the condition of severe temperature change, the change in the size of the explosive grain will cause charge defects such as bottom gap, annular gap, crack, etc., which will have a huge impact on the performance of the ammunition, and will significantly increase the probability of failure of weapons and equipment. At present, there...

AI Technical Summary

Problems solved by technology

Both methods of measurement are fatally flawed

The first measurement method can only measure the deformation of the grain before and after the test, and cannot detect the dimensional changes in the process in real time. Manual measurement with distance measuring tools such as vernier calipers has low measurement accuracy and large errors caused by manual measurement. At the same time, there is a great safety hazard caused by direct manipulation of dangerous goods after the temperature change by humans; although the second measurement method can detect the dimensional change process of the grain under the temperature loading condition in real time, it can only Measure the axial change of the grain column under constraint conditions (in the quartz tube). In addition, both the thermomechanical analysis method and the dilatometer method have strict restrictions on the size of the sample. The diameter of the sample that can be measured does not exceed 5mm, and the size of the grain column The impact on the deformation caused by the effect has not been considered; in addition, the existing technology cannot simultaneously detect the axial and radial deformation of multiple grains under the same conditions at the same time. Dimensional change under changing conditions is one of the important design principles in the process of explosive formula design. If the axial and radial dimensional changes of different formula explosive columns under the same conditions can be compared at the same time, it can provide a direct reference for explosive formula design

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