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A method of laser measuring effect target deformation

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 problems such as slow filling and measurement of fillers, difficult control of measurement stability, and difficulty in obtaining data on site. Achieve the effects of less human error, fast measurement speed, and convenient follow-up research

Active Publication Date: 2017-09-29
XIAN MODERN CHEM RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A method of laser measuring effect target deformation
  • A method of laser measuring effect target deformation
  • A method of laser measuring effect target deformation

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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] Such as 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 ...

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] Such as 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 p...

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] Such as 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 perp...

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Abstract

The invention discloses a method for measuring the deformation of an effect target by laser, which relates to the field of damage test, and solves the problems of low measurement efficiency, large operation error and poor measurement stability of the existing measurement method. The method uses laser measurement technology combined with data analysis means to quickly and accurately measure the deformation parameters of the effect target, and the measurement device used includes: a measurement system (3), a data recording system (4), and an automatic data processing program (5). First, the geometric parameters of the deformed part of the effect target are obtained by the laser distance measuring device (1) and the angle measuring device (2) of the measurement system (3), and then the automatic data processing program (5) reads these parameters from the data recording system (4) Geometric parameters and calculation Obtain the deformation parameters of the effect target - the maximum depth H of the pit and the volume V of the pit, and generate a three-dimensional graphic display of the deformed pit at the same time.

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 Patents(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