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Method for measuring deformation of effect target with laser

A technology of laser measurement and laser distance measurement, which is applied to volume measurement instruments/methods, measurement devices, and measurement capacity, etc. It can solve the problems of difficult control of measurement stability, slow filling and metering of fillers, and difficulty in obtaining data on site. Achieve the effect of fast measurement speed, less human error, and convenient follow-up research

Active Publication Date: 2015-12-16
XIAN MODERN CHEM RES INST
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  • Claims
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Problems solved by technology

[0004] This traditional measurement method has the following disadvantages: ① The operation process is cumbersome and takes a long time, especially the filling and metering of the filling in the measurement process of the pit volume V is slow, and it is difficult to obtain data on site. In order to control the test progress, Usually after the test is completed, the effect target is transported back from the test site and then measured; ②The operation error is large and the measurement stability is poor. On the one hand, the effect target may be deformed twice during the transportation process; on the other hand, all The measurement steps are manually completed, and the measurement data is read by the tester; in addition, for effect targets of different sizes, the range and accuracy of the measuring instruments are also different, so the operation error caused by man-made in the whole measurement process is large, and the measurement stability Difficult to control; ③The effect target needs to be specially preserved in order to check the geometry of the effect target pit in subsequent studies

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  • Method for measuring deformation of effect target with laser
  • Method for measuring deformation of effect target with laser
  • Method for measuring deformation of effect target with laser

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Experimental program
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Effect test

Embodiment 1

[0053] In this embodiment, the effect target is a circular thin aluminum plate of Φ300mm×2mm. The maximum deformation depth H and the pit volume V of the effect target after the shock wave with a peak value of 0.37MPa are measured as 24.5mm and 307ml respectively by traditional methods. Now use the method of the present invention to measure the maximum deformation depth H and pit volume V of the effect target, and the specific steps are as follows:

[0054] (a) Calibrate the relative position of the laser light source and the effect target

[0055] like Figure 4 As shown, the effect target is placed horizontally, so that the effect target plane is in a horizontal state, and the maximum depth point of the effect target pit is marked, that is, the geometric center of the pit, which is recorded as o. Adjust the position of the laser distance measuring device so that the laser distance measuring device is located directly above the deformation pit of the effect target and is per...

Embodiment 2

[0067] In this embodiment, the effect target is a circular thin aluminum plate of Φ150 mm × 2 mm. The maximum deformation depth H and the pit volume V of the effect target after the shock wave with a reflection pressure peak value of 9 MPa (internal explosion) are measured by traditional methods as 20.6mm and 105ml. Now use the method of the present invention to measure the maximum deformation depth H and pit volume V of the effect target, and the specific steps are as follows:

[0068] (a) Calibrate the relative position of the laser light source and the effect target

[0069] like Figure 4 As shown, the effect target is placed horizontally, so that the effect target plane is in a horizontal state, and the maximum depth point of the effect target pit is marked, that is, the geometric center of the pit, which is recorded as o. Adjust the position of the laser distance measuring device so that the laser distance measuring device is located directly above the deformation pit ...

Embodiment 3

[0081] In this embodiment, the effect target is a round thin aluminum plate of Φ800mm×2mm. The maximum deformation depth H and pit volume V of the effect target after the shock wave with a peak value of 0.13MPa are measured by traditional methods to be 14.5mm and 583ml respectively. Now use the method of the present invention to measure the maximum deformation depth H and pit volume V of the effect target, and the specific steps are as follows:

[0082] (a) Calibrate the relative position of the laser light source and the effect target

[0083] like Figure 4 As shown, the effect target is placed horizontally, so that the effect target plane is in a horizontal state, and the maximum depth point of the effect target pit is marked, that is, the geometric center of the pit, which is recorded as o. Adjust the position of the laser distance measuring device so that the laser distance measuring device is located directly above the deformation pit of the effect target and is perpend...

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Abstract

The invention discloses a method for measuring deformation of an effect target with a laser, relates to the field of damage experiment testing, and solves problems that a conventional measurement method is low in efficiency, large in operation error and poor in measurement stability. The method combines the laser measurement technology and the data analysis means, and can measure the deformation parameters of the effect target rapidly and accurately. A measurement device comprises a measurement system (3), a data recording system (4) and a data automatic processing program (5). Firstly, a laser range finding device (1) and a angle measurement device (2) of the measurement system (3) obtain geometric parameters of a deformed part of the effect target, then the data automatic processing program (5) reads the geometric parameters from the data recording system (4) and performs calculation, so as to obtain the deformation parameters of the effect target-the maximum depth H and the size V of a concave pit and to generate three-dimensional graphic display of the deformed concave pit.

Description

technical field [0001] The invention belongs to the field of damage test, and in particular relates to a method for measuring the deformation of an effect target by laser. Background technique [0002] The shock wave is one of the main damage elements of the ammunition / warhead, and the effect target is an important means to reflect the effect of the explosive shock wave of the ammunition / warhead at a certain position in space. The characteristics of the pit, the maximum depth H and volume V of the pit are important parameters that characterize the strength of the shock wave. However, there is currently a lack of a method that can quickly and accurately measure the maximum depth H and volume V of the deformation pit of the effect target. [0003] Currently, researchers mainly use horizontal scales and vertical scales to measure the maximum depth H( figure 1 shown). For the volume V of the deformed pit, it is measured by using a liquid or granular filler (such as sand) with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/16G01B11/22G01F17/00
Inventor 蒋海燕董树楠苏健军李芝绒张玉磊翟红波袁建飞
Owner XIAN MODERN CHEM RES INST
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