阅读说明：本技术 一种微火工品爆轰温度场测试装置及三维重构方法 (Testing device and three-dimensional reconstruction method for detonation temperature field of micro-explosive device ) 是由 王佳 刘荣明 吴慎将 李党娟 程军霞 吴银花 薛嘉隆 曹妍 于 2020-04-30 设计创作，主要内容包括：本发明涉及一种微火工品爆轰温度场测试装置及三维重构方法。通过使用三组透射式纹影系统,配合高速摄像相机组,获得含有微火工品爆轰温度场的纹影图像,能够解决微火工品的温度场测试问题,并且可以基于该测试结果进行温度场的三维重构。本发明的技术方案为：光纤耦合激光器产生的单色光,通过1×3光纤分束器得到三束光功率相等的激光光束,三路激光光束分别进入透射式纹影系统模块,通过光纤耦合透镜保证激光束扩束准直,经过第一凸透镜后变为平行光,保证光束均匀通过被测对象,在第二凸透镜后,光束汇聚于刀口装置的刀口位置,通过高速摄像相机组进行纹影图像的采集,并经所述PC端数据处理模块处理,获得微火工品爆轰三维温度场。(The invention relates to a testing device and a three-dimensional reconstruction method for a detonation temperature field of a micro-explosive device. By using three groups of transmission type schlieren systems and matching with a high-speed camera set, a schlieren image containing a detonation temperature field of the micro-initiating explosive device is obtained, the temperature field test problem of the micro-initiating explosive device can be solved, and the three-dimensional reconstruction of the temperature field can be carried out based on the test result. The technical scheme of the invention is as follows: monochromatic light generated by the optical fiber coupling laser device is obtained through the 1 x 3 optical fiber beam splitter into three laser beams with equal optical power, the three laser beams enter the transmission type schlieren system module respectively, the laser beams are guaranteed to be expanded and collimated through the optical fiber coupling lens, the laser beams are changed into parallel light after passing through the first convex lens, the light beams are guaranteed to uniformly pass through a measured object, the light beams are converged at the knife edge position of the knife edge device after the second convex lens, schlieren images are collected through the high-speed camera set and processed through the PC end data processing module, and a three-dimensional temperature field of detonation of the micro-pyrotechnic work piece is obtained.)

1. The utility model provides a little initiating explosive device detonation temperature field testing arrangement which characterized in that: the system comprises an optical fiber coupling laser (1), a 1 x 3 optical fiber beam splitter (2), a transmission schlieren system module (3), a high-speed camera set and a PC (personal computer) end data processing module (5);

the transmission type schlieren system modules (3) are 3 groups, and each group comprises an optical fiber coupling lens (8), a first convex lens (9), a second convex lens (11) and a knife edge device (12); the output of the optical fiber coupling lens (8) sequentially passes through a first convex lens (9) and a second convex lens (11) and is converged by a knife edge device (12), and a micro initiating explosive device (10) is arranged between the two convex lenses; the 3 groups of transmission type schlieren system modules (3) are distributed according to the arrangement with the included angle of 120 degrees;

the output of the optical fiber coupling laser (1) is connected with the input end of a 1 x 3 optical fiber beam splitter (2), the output end of the 1 x 3 optical fiber beam splitter (2) is respectively connected with the input ends of 3 groups of transmission schlieren system modules (3), the output end of the 3 groups of transmission schlieren system modules (3) is respectively connected with the input ends of a first 3 high-speed camera (4), a second high-speed camera (6) and a third high-speed camera (7), and the output end of the high-speed camera set is connected with a PC end data processing module (5).

2. The device for testing the detonation temperature field of the micro-initiating explosive device according to claim 1, characterized in that: the wavelength of the optical fiber coupling laser (1) is determined according to the temperature change range of the micro initiating explosive device to be measured.

3. The device for testing the detonation temperature field of the micro-initiating explosive device according to claim 1, characterized in that: the 1 x 3 optical fiber beam splitter (2) outputs a light beam with uniform light intensity.

4. The three-dimensional reconstruction method of the micro-explosive detonation temperature field testing device according to claim 1, characterized in that: monochromatic light generated by the optical fiber coupling laser (1) is obtained through a 1 x 3 optical fiber beam splitter (2) to form three laser beams with equal optical power, the three laser beams enter a transmission type schlieren system module (3) respectively, the laser beam is guaranteed to expand and collimate through an optical fiber coupling lens (8), the laser beam is changed into parallel light after passing through a first convex lens, the light beam is guaranteed to uniformly pass through a measured object, the light beam is converged at the knife edge position of a knife edge device (12) after a second convex lens, schlieren images are collected through a high-speed camera set and processed through a PC (personal computer) end data processing module (5), and a micro-fire work detonation three-dimensional temperature field is obtained.

Technical Field

The invention relates to the technical field of testing of initiating explosive devices temperature fields, in particular to a testing device and a three-dimensional reconstruction method of a micro initiating explosive device detonation temperature field.

Background

With the development of miniaturized weapons and information weapons, the research on micro-firearms testing technology based on transduction informatization, structural miniaturization and sequence aggregation is increasing. The main problems to be solved are the response characteristic and energy transfer problem of the energy-containing material under the micro-scale (micron or nanometer). The detonation temperature of the micro-initiating explosive device is one of important parameters of the detonation performance of the micro-initiating explosive device, which is necessary for researching the reaction zone structure and the detonation result of the micro-initiating explosive device, and the performance of the micro-initiating explosive device can be estimated and controlled.

The mainstream temperature field testing methods at present are a contact temperature measuring method and a non-contact temperature measuring method. Because the temperature field generated by the detonation of the micro-initiating explosive device has the characteristics of high temperature and short duration, the use of the contact temperature measuring method is limited by the melting point of the material of the temperature measuring element, and the integrity of the temperature field of the measured object can be damaged due to the existence of the temperature measuring element. In the existing testing technology, a non-contact temperature measurement method is generally adopted, and because the detonation time window of the micro-initiating explosive device is small, the temperature field test of millisecond time scale cannot be accurately carried out, the test information of the detonation temperature field of the micro-initiating explosive device cannot be obtained, and the three-dimensional reconstruction of the detonation temperature field cannot be carried out.

Disclosure of Invention

In view of the above, the invention provides a device and a method for testing a detonation temperature field of a micro-explosive device, which can obtain a schlieren image containing the detonation temperature field of the micro-explosive device by using three sets of transmissive schlieren systems and matching with a high-speed camera set, solve the problem of testing the temperature field of the micro-explosive device, and perform three-dimensional reconstruction of the temperature field based on the test result.

In order to solve the problems in the prior art, the technical scheme of the invention is as follows: the utility model provides a little initiating explosive device detonation temperature field testing arrangement which characterized in that: the system comprises an optical fiber coupling laser, a 1 x 3 optical fiber beam splitter, a transmission schlieren system module, a high-speed camera set and a PC (personal computer) end data processing module;

the transmission type schlieren system module comprises 3 groups, wherein each group comprises an optical fiber coupling lens, a first convex lens, a second convex lens and a knife edge device; the output of the fiber coupling lens sequentially passes through the first convex lens and the second convex lens and is converged by the knife edge device, and a micro initiating explosive device is arranged between the two convex lenses; the 3 groups of transmission type schlieren system modules are arranged and distributed according to the included angle of 120 degrees;

the output of the optical fiber coupling laser is connected with the input end of a 1 x 3 optical fiber beam splitter, the output end of the 1 x 3 optical fiber beam splitter is respectively connected with the input ends of 3 groups of transmission schlieren system modules, the output ends of the 3 groups of transmission schlieren system modules are respectively connected with the input ends of a first high-speed camera, a second high-speed camera and a third high-speed camera, and the output end of the high-speed camera group is connected with a PC end data processing module.

Further, the wavelength of the optical fiber coupling laser is determined according to the temperature change range of the micro initiating explosive device to be measured.

Further, the 1 × 3 fiber beam splitter outputs a beam of uniform light intensity.

A three-dimensional reconstruction method of a testing device of a detonation temperature field of a micro-firer is characterized by comprising the following steps: monochromatic light generated by the optical fiber coupling laser device is obtained through the 1 x 3 optical fiber beam splitter into three laser beams with equal optical power, the three laser beams enter the transmission type schlieren system module respectively, the laser beams are guaranteed to be expanded and collimated through the optical fiber coupling lens, the laser beams are changed into parallel light after passing through the first convex lens, the light beams are guaranteed to uniformly pass through a measured object, the light beams are converged at the knife edge position of the knife edge device after the second convex lens, schlieren images are collected through the high-speed camera set and processed through the PC end data processing module, and a three-dimensional temperature field of detonation of the micro-pyrotechnic work piece is obtained.

Compared with the prior art, the invention has the following advantages:

1. the method can accurately obtain the parameter information of the detonation temperature field of the micro-explosive, and the acquisition and storage of the schlieren image are carried out by the high-speed camera set, and the three-dimensional temperature field of the detonation of the micro-explosive is obtained by the PC-end data processing module.

2. The measuring device has low cost and simple measuring process, can measure information on millisecond time scale, and the measuring time scale is determined by the frame frequency of the high-speed camera used by the measuring device.

3. The three-channel-based transmission type schlieren system avoids the problems that the traditional single-channel schlieren system is insufficient in data acquisition and cannot acquire three-dimensional temperature field information. Through arranging the transmission type schlieren system in a mode of forming an included angle of 120 degrees, more data sources can be obtained, and a micro-explosive detonation three-dimensional temperature field can be reconstructed more accurately.

Description of the drawings:

FIG. 1 is a schematic structural diagram of a method for testing and three-dimensional reconstruction of a detonation temperature field of a micro-explosive device according to the present invention;

FIG. 2 is a schematic structural diagram of a transmission type schlieren system module of the method for testing and three-dimensional reconstructing detonation temperature field of micro-initiating explosive device according to the present invention;

FIG. 3 is a calculation flow chart of a PC-side data processing module of the method for testing and three-dimensional reconstructing detonation temperature field of micro-explosives provided by the invention;

in the figure: the system comprises a 1-optical fiber coupling laser, a 2-1 x 3 optical fiber beam splitter, a 3-transmission schlieren system module, a 4-high-speed camera I, a 5-PC end data processing module, a 6-high-speed camera II, a 7-high-speed camera III, an 8-optical fiber coupling lens, a 9-first convex lens, a 10-micro-initiating explosive device, an 11-second convex lens and a 12-knife edge device.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

A testing device for detonation temperature field of micro-firer comprises an optical fiber coupling laser 1, a 1 x 3 optical fiber beam splitter 2, a transmission type schlieren system module 3, a high-speed camera set and a PC end data processing module 5, as shown in figures 1 and 2;

the high-speed camera set comprises a first high-speed camera 4, a second high-speed camera 6 and a third high-speed camera 7;

the transmission type schlieren system modules 3 are 3 groups, and each group comprises an optical fiber coupling lens 8, a first convex lens 9, a second convex lens 11 and a knife edge device 12; the output of the optical fiber coupling lens 8 sequentially passes through a first convex lens 9 and a second convex lens 11 and is converged by a knife edge device 12, and a micro-initiating explosive device 10 is placed between the two convex lenses and serves as a detonation temperature field generating source; the 3 groups of transmission type schlieren system modules 3 are arranged and distributed according to the included angle of 120 degrees;

the output of the optical fiber coupling laser 1 is connected with the input end of a 1 x 3 optical fiber beam splitter 2, the output end of the 1 x 3 optical fiber beam splitter 2 is respectively connected with the input ends of 3 groups of transmission type schlieren system modules 3, the output ends of the 3 groups of transmission type schlieren system modules 3 are respectively connected with the input ends of a first 3 high-speed camera 4, a second 6 high-speed camera and a third 7 high-speed camera, and the output end of the high-speed camera set is connected with a PC end data processing module 5.

The wavelength of the optical fiber coupling laser 1 can be selected from 532nm, 632nm, 980nm, 1310nm, 1550nm and the like, and the specific selection is determined according to the temperature change range of the micro initiating explosive to be measured.

The 1X 3 optical fiber beam splitter 2 outputs light beams with uniform light intensity, ensures that background light of the obtained schlieren image is consistent, and is beneficial to post data processing.

The fiber coupling lens in the transmission type schlieren system module 3 disperses the laser beam in the optical fiber according to a certain angle to form a laser beam with uniform illumination; the two convex lenses ensure that the light beams uniformly penetrate through the object to be measured to obtain a complete schlieren image; the knife edge device can block the light beam which passes through the tested object and is deflected to the knife edge, and the schlieren image with uniform imaging can be obtained.

The high-speed camera set ensures that a schlieren imaging image with millisecond time scale can be acquired.

The PC-side data processing module 5 calculates three paths of schlieren images, and mainly includes: the method comprises the steps of schlieren image acquisition, schlieren image selection, schlieren image filtering, particle offset calculation, calculation of corresponding temperature values of all areas, three-dimensional reconstruction of temperature fields and the like, and finally the three-dimensional temperature fields of the detonation of the micro-explosive device are obtained.

A three-dimensional reconstruction method of a testing device of a detonation temperature field of a micro-firer comprises the following steps:

monochromatic light generated by the optical fiber coupling laser 1 is obtained through the 1 x 3 optical fiber beam splitter 2, three laser beams with equal optical power are obtained and enter the optical fiber coupling lens 8 of the transmission type schlieren system module 3 respectively, the light beams are guaranteed to be transmitted at a certain included angle through the optical fiber coupling lens 8 and become parallel light after passing through the first convex lens, after the micro-explosive workpiece detonation temperature field area is guaranteed to be uniformly penetrated, the light beams are gathered at the knife edge position of the knife edge device 12 after passing through the second convex lens, the three laser beams enter the high-speed camera 4, the high-speed camera 6 and the high-speed camera 7 respectively to collect detonation temperature field schlieren images and are processed by the PC end data processing module 5 to obtain the micro-explosive workpiece detonation three-dimensional temperature field.