A ladder-type probe element for measuring the attitude of flyers driven by detonation and its testing method

A bracket type and component technology, applied in the field of step bracket type probe components, can solve the problems of large human error of negative film, difficult to accurately determine wave head position, harsh test conditions, etc., to improve reliability, save pre-experiment preparation, The effect of reducing the difficulty of operation and the scope of application

Active Publication Date: 2021-08-10
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above-mentioned high-speed photography technology is more objective and credible in principle, in actual operation, the equipment is complicated, the test conditions are harsh, and the experimental cost is also high. In addition, there are large human errors in the data processing of the film, especially for the accurate determination of the wave head position. There are great difficulties

Method used

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  • A ladder-type probe element for measuring the attitude of flyers driven by detonation and its testing method
  • A ladder-type probe element for measuring the attitude of flyers driven by detonation and its testing method
  • A ladder-type probe element for measuring the attitude of flyers driven by detonation and its testing method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1 makes ladder support type probe element

[0031] To make a stepped bracket type probe element: first cut a 6mm thick plexiglass sheet into a ladder shape as shown in Figure 1, where the upper step is 100-200mm long and 20-100mm high, and the lower step is 0-200mm long and high 0~20mm, the inclination angle of the inclined surface is 45°; a layer of copper foil and stainless steel wire mesh are pasted and laid successively on the plexiglass step surface, in which the stainless steel wire mesh is 60 mesh, the wire diameter is 0.12mm, and the aperture is 0.25mm; the diameter 0.08mm, the thickness of the enamelled layer is about 0.016mm, and the enamelled resistance wire with a unit length resistance value of 279Ω / m is folded in half and twisted into a strand, then laid along the axial direction of the stainless steel wire mesh, and covered with copper foil for shielding, and the internal air is squeezed out when used , the two ends of the enamelled resistance ...

Embodiment 2

[0032] Embodiment 2 Utilizes the probe element of embodiment 1 to carry out flat-panel flight attitude measurement test

[0033] The specific dimensions of the stepped bracket type probe element are: the length of the upper step is 100mm, the height is 25mm, the length of the lower step is 200mm, the height is 5mm, and the inclination angle of the inclined surface is 45°; the experimental device is according to figure 2Design, the double board and the base plate are made of cold-rolled steel plate, 800mm long, 200mm wide, and 2mm thick. First, place the base plate on a flat sandy ground, and use superglue to fix the ladder-type probe element on the center of the upper surface of the base plate. The head of the element (the side of the upper step surface) is 300mm away from the initiation end, connect one end of the coaxial cable to the output end of the probe element, and use aluminum foil to paste the shield; And use a thin aluminum sheet with a height of 25mm to support the ...

Embodiment 3

[0034] Embodiment 3 utilizes the probe element of embodiment 1 to carry out circular tube flight attitude measurement test

[0035] The specific dimensions of the stepped bracket type probe element are: the length of the upper step is 100mm, the height is 45mm, the length of the lower step is 5mm, the height is 5mm, and the inclination angle of the inclined surface is 45°; the experimental device is according to image 3 Design, the copper tube material is red copper, the outer diameter is 30.4mm, the thickness is 2.5mm, and the length is 300mm. The inside is evenly filled with a certain density of powdery RDX. Use super glue to fix the ladder bracket type probe element on the wooden frame, and then fix it It is clamped and fixed with the copper pipe as a whole, and installed on the base; the height of the frame is 250mm, that is, the head of the probe element (the side of the upper step surface) is 50mm away from the initiation end, and one end of the coaxial cable is connecte...

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Abstract

The invention belongs to the technical field of explosion and impact testing, and provides a ladder bracket type probe element for measuring the attitude of flying pieces driven by detonation and a testing method thereof. The specific test steps are as follows: (1) Fix the ladder bracket type probe element On the outer surface of the flyer to be tested, use a coaxial cable to connect the output end to the signal acquisition instrument; (2) Lay or fill a certain explosive on the flyer to be tested, and insert the detonator into the detonating end; (3) After detonating, record the probe The dynamic voltage or current signal caused by the resistance value change of the needle element; (4) convert the electrical signal into the time course curve of the conduction of the resistance wire, and analyze the corresponding segment data to obtain the detonation velocity of the explosive and the flight trajectory of the flyer. The element of the invention greatly reduces the influence of clutter interference on test results; it can continuously measure the detonation velocity of explosives and the flying attitude of flyers, and has the advantages of simple operation, low cost and wide application range.

Description

technical field [0001] The invention belongs to the technical field of explosion and impact testing, and relates to a stepped bracket type probe element 10 for measuring the attitude of flying pieces driven by detonation and a testing method thereof. Background technique [0002] After the plane or axisymmetric charge explodes on the surface of the metal component, the high-speed expansion detonation product will directly act on the metal component, driving the plate or shell to do two-dimensional deformation or flight movement. The most common is the sliding during explosive welding. Accelerated movement of doubler plate or circular tube driven by shifting detonation. The above process is a very complicated two-dimensional detonation driving problem. The main experimental methods for studying this problem include oblique resistance wire method, electric probe method, high-speed photography method and X-ray flash photography method. The double-slope resistance wire method i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/02G01N3/313
CPCG01N3/02G01N3/313
Inventor 李晓杰李科斌闫鸿浩王小红王宇新孙明曾翔宇陈翔王健
Owner DALIAN UNIV OF TECH
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