阅读说明：本技术 一种用于冲击片***的飞片速度测量平台 (Flying piece speed measuring platform for impact piece detonator ) 是由 赵新 李莎 贺瑞 余思思 于 2019-10-29 设计创作，主要内容包括：本发明公开了一种用于冲击片雷管的飞片速度测量平台,该工装包括产品固定环、激光对准件、产品支撑杆、产品支撑底座、两个光纤固定块、光纤、光纤搭载平台。产品固定环、产品支撑杆以及产品支撑底座用于对激光对准件进行固定和支撑,光纤固定块、光纤搭载平台用于对光纤进行固定和位置调整。通过调节光纤搭载平台的旋钮,使光纤的末端与激光对准件的小孔对准,并借助激光验证卡验证激光通路与小孔同轴,用冲击片雷管替换激光对准件,完成光纤对准。对激光发射/接收器采集到的反射信号进行解算,利用多普勒效应,求得飞片实时速度。本发明具有操作简易、测量精度高、可重复性高以及成本低廉的特点。(The invention discloses a flying piece speed measuring platform for an impact piece detonator. The product fixing ring, the product supporting rod and the product supporting base are used for fixing and supporting the laser alignment part, and the optical fiber fixing block and the optical fiber carrying platform are used for fixing and adjusting the position of the optical fiber. The tail end of the optical fiber is aligned with the small hole of the laser alignment piece by adjusting the knob of the optical fiber carrying platform, the laser passage is verified to be coaxial with the small hole by the aid of the laser verification card, the laser alignment piece is replaced by the impact sheet detonator, and optical fiber alignment is completed. And resolving the reflected signal acquired by the laser transmitter/receiver, and solving the real-time speed of the flyer by using the Doppler effect. The invention has the characteristics of simple operation, high measurement precision, high repeatability and low cost.)

1. The utility model provides a flying piece speed measuring platform for strikeing piece detonator, includes and supports the module by the product that base (1), product bracing piece (2), laser alignment piece (3) and the solid fixed ring of product (4) are constituteed to and support the module by optic fibre fixed block (6 and 8), optic fibre (7) and optic fibre carry on the optic fibre that platform (9) are constituteed, its characterized in that: the product supporting rod (2) is respectively connected with the product fixing ring (4) and the product supporting base (1); the product fixing ring (4) is connected with the laser alignment piece (3) or the impact sheet detonator (12); the surface of each optical fiber fixing block (6, 8) is provided with a semicircular groove to reliably fix the optical fiber (7), and each optical fiber carrying platform (9) is provided with an adjusting knob, so that the optical fiber fixing blocks (6 and 8) placed on the optical fiber carrying platforms can be adjusted up and down, front and back and left and right, the position of the optical fiber (7) is adjusted, and the laser passing through the optical fiber (7) can smoothly pass through a through hole in the central area of the laser alignment part (3).

2. The flying piece velocity measuring platform for impact piece detonators of claim 1, wherein: the product fixing ring (4) is made of superhard aluminum, an external thread of M3 is arranged in the center area of the outer annular surface of the product fixing ring along the radial direction and is used for being connected with the product supporting rod (2), and an internal thread of M10 is arranged on the inner ring of the product fixing ring (4) and is used for being connected with the laser alignment piece (3) or the impact sheet detonator (12).

3. The flying piece velocity measuring platform for impact piece detonators of claim 1, wherein: the laser alignment piece (3) is made of super-hard aluminum, the laser alignment piece (3) and the impact sheet detonator (12) are provided with the same external thread interface, a through hole with the diameter of 0.5mm is formed in the central area of the laser alignment piece (3), laser passing along the optical fiber (7) passes through the through hole, a small hole with the diameter of 0.5mm is also formed in the central area of the impact sheet detonator (12), and when the laser alignment piece works, the flying sheet flies out of the small hole.

4. The flying piece velocity measuring platform for impact piece detonators of claim 3, wherein: when carrying out laser alignment, the external screw thread of laser alignment piece (3) is connected with product fixed ring (4), and when the circular laser facula appeared on the laser verification card, the laser route was coaxial with the through-hole of laser alignment piece (3), took laser alignment piece (3) this moment, changed into impact piece detonator (12) that is M10 hickey together.

5. The flying piece velocity measuring platform for impact piece detonators of claim 1, wherein: the product supporting rod (2) is made of stainless steel, the two ends of the product supporting rod are provided with M3 external threads, and the product supporting rod can be connected with the corresponding M3 internal threads on the product fixing ring (4) and the product supporting base (1) respectively.

6. The flying piece velocity measuring platform for impact piece detonators of claim 1, wherein: the product supporting base (1) is made of stainless steel, the outer contour of the product supporting base is a disc with the diameter of 40mm, and the central area of the product supporting base is provided with M3 internal threads for being connected with the product supporting rod (2).

7. The flying piece velocity measuring platform for impact piece detonators of claim 1, wherein: two optic fibre fixed block (6 and 8) outline dimensions are the same completely, all adopt the superhard aluminium material, and the lower surface of optic fibre fixed block (6) and the upper surface of optic fibre fixed block (8) all are provided with a semicircular groove along the center pin direction, and the diameter of this recess is 1mm, and optic fibre fixed block (6) and 8) another side relative with the recess all are provided with screw hole (5) of M2 and fasten optic fibre fixed block (6) and 8), and then realize that optic fibre (7) are fixed.

8. The flying piece velocity measuring platform for impact piece detonators of claim 1, wherein: the diameter of the inner core of the optical fiber (7) is 0.5mm and is used for transmitting laser, the outer layer is a rubber sleeve, and the outer diameter is 1mm, so that the inner core is protected.

Technical Field

The invention relates to the field of measurement, in particular to the field of speed measurement of a miniature object flying at a high speed, and particularly relates to a platform for measuring the speed of a flying piece of an impact piece detonator.

Background

The impact sheet detonator is a core transduction element of an in-line ignition system of the solid rocket engine, and the real-time speed of the flying sheet is an important basis for evaluating the output energy of the impact sheet detonator. The existing measuring method is to clamp the impact sheet detonator and the optical fiber respectively in a hand-held mode or by a simple clamp, adjust the relative positions of the impact sheet detonator and the optical fiber, align the tail end of the optical fiber to an output small hole of the impact sheet detonator, and acquire a laser signal reflected from a flying sheet to obtain the flying speed of the flying sheet by using the Doppler effect. Because the sizes of the output small hole of the impact sheet detonator and the optical fiber are smaller, the optical fiber alignment accuracy is easily low by using a simple clamping device and human eye identification mode, and the mode can only ensure that the flying sheet flight path and the laser path have a cross point and cannot ensure that the laser path and the small hole are coaxial, even a certain included angle exists between the flying sheet flight path and the laser path, the larger the included angle is, the weaker the signal intensity acquired by an acquisition system is, the more easily the signal intensity is submerged by noise, and further the calculated flying sheet speed error is larger; on the other hand, when the flying piece velocity measurement is performed on each percussion piece detonator, a large amount of time and energy are required to be consumed for performing optical fiber alignment, and the optical fiber alignment workload is obviously large for the flying piece velocity measurement task of dozens of or even hundreds of percussion piece detonators in a batch.

In addition, for the fragile optical fiber, the long alignment operation can easily cause the optical fiber to be damaged, and the test cost is increased to a certain extent.

Disclosure of Invention

The invention aims to provide a flyer velocity measuring platform for an impact sheet detonator, overcomes the defects of high alignment difficulty, low precision, poor repeatability, relatively high cost and the like in the conventional flyer velocity measuring technology, and has the characteristics of simplicity in operation, high measuring precision, high repeatability and low cost.

The technical scheme adopted for achieving the purpose of the invention is as follows:

the utility model provides a flying piece speed measuring platform for strikeing piece detonator, includes the product support module who constitutes by the solid fixed ring of product, laser alignment piece, product bracing piece and product support base to and the optic fibre support module who constitutes by optic fibre fixed block, optic fibre and optic fibre carrying platform, its characterized in that: the product supporting rod is respectively connected with the product fixing ring and the product supporting base; the product fixing ring is connected with the laser alignment piece or the impact sheet detonator; the surfaces of the two optical fiber fixing blocks are provided with semicircular grooves to reliably fix the optical fibers, the optical fiber carrying platform is provided with an adjusting knob, the two optical fiber fixing blocks placed on the optical fiber carrying platform can be adjusted up and down, back and left and right, and then the position of the optical fibers is adjusted, so that the laser passing along the optical fibers can smoothly pass through the through hole in the central area of the laser alignment part.

In the flying piece speed measuring platform for the impact piece detonator, the product fixing ring is made of superhard aluminum, an external thread of M3 is radially arranged in the central area of the outer ring surface of the product fixing ring and is used for being connected with the product supporting rod, and an internal thread of M10 is arranged on the inner ring of the product fixing ring and is used for being connected with the laser alignment piece or the impact piece detonator;

in the flying piece speed measuring platform for the impact piece detonator, the laser alignment piece is made of superhard aluminum and is provided with an M10 external thread, a through hole with the diameter of 0.5mm is arranged in the central area of the laser alignment piece, and the hole depth is far from the super aperture;

in the flying piece speed measuring platform for the impact piece detonator, when laser alignment is carried out, the external thread of the laser alignment piece is connected with the product fixing ring, when a circular laser spot appears on the laser verification card, a laser path is coaxial with the through hole, and at the moment, the laser alignment piece is taken off and replaced by the impact piece detonator which is also an M10 threaded interface;

in the flying piece speed measuring platform for the impact piece detonator, the product supporting rod is made of stainless steel, and the two ends of the product supporting rod are provided with M3 external threads which are respectively connected with the corresponding M3 internal threads on the product fixing ring and the product supporting base;

in the flying piece speed measuring platform for the impact piece detonator, the product supporting base is made of stainless steel, the outer contour of the product supporting base is a disc with the diameter of 40mm, and the central area of the product supporting base is provided with M3 internal threads for connecting with a product supporting rod;

in the flying piece speed measuring platform for the impact piece detonator, the two optical fiber fixing blocks are completely the same in outline size and both made of superhard aluminum, semicircular grooves are formed in the adjacent surfaces along the direction of the central shaft, the diameter of each groove is 1mm, and the other surfaces of the two optical fiber fixing blocks opposite to the grooves are provided with M2 threaded holes for fastening the two optical fiber fixing blocks, so that optical fiber fixing is realized;

in the flying piece speed measuring platform for the impact piece detonator, the diameter of the inner core of the optical fiber is 0.5mm and is used for transmitting laser, the outer layer of the optical fiber is a rubber sleeve, and the outer diameter of the optical fiber is 1mm, so that the inner core is protected.

Compared with the prior art, the invention has the beneficial effects that:

1. in the flying piece speed measuring platform for the impact piece detonator, the product fixing ring, the laser alignment piece, the product supporting rod, the optical fiber fixing block and the like are simple in structural design, the materials are selected from low-price superhard aluminum and stainless steel, the material cost and the processing cost are relatively low, the optical fiber carrying platform is a common small-sized object stage in a laboratory, the cost is not high, and therefore the whole set of tool is relatively low in cost.

2. When the laser alignment is carried out, the laser alignment piece is connected with the product fixing ring in a threaded mode, the relative positions of the small hole of the laser alignment piece and the optical fiber are adjusted by adjusting the knob of the optical fiber carrying platform, and alignment confirmation is carried out by means of spots on the laser verification card.

3. In the invention, because the depth of the small hole of the laser alignment piece is far greater than the aperture, once the calibration is completed, the high coaxiality of the laser path and the small hole can be realized, the reflected laser signal is stronger, and the speed measurement precision of the flyer is higher.

4. For impact piece detonators with different thread sizes, the product fixing ring and the laser alignment piece are only required to be re-processed according to the thread sizes, and other parts are not required to be changed at all, so that the method has the advantage of high universality.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic illustration of the laser alignment of the present invention when a circular bright spot 11 appears on the laser verification card 10, indicating that the optical fiber 7 has been aligned with the laser alignment member 3.

Fig. 3 is a schematic structural diagram of the laser alignment member 3 in fig. 1 replaced with a striking plate ignition tube 12 for carrying out flying plate velocity measurement.

The reference numbers are: the method comprises the following steps of 1-a product supporting base, 2-a product supporting rod, 3-a laser alignment piece, 4-a product fixing ring, 5-a threaded hole, 6-an optical fiber fixing block, 7-an optical fiber, 8-an optical fiber fixing block, 9-an optical fiber carrying platform, 10-a laser verification card, 11-a circular bright spot and 12-an impact sheet detonator.

Detailed Description

Referring to the attached drawing 1, the flying piece speed measuring platform for the impact piece detonator 12 comprises a product supporting base 1, a product supporting rod 2, a laser alignment piece 3, a fixing ring 4, two optical fiber fixing blocks 6 and 8, an optical fiber 7 and an optical fiber carrying platform 9. The product fixing ring 4, the product supporting rod 2 and the product supporting base 1 are used for fixing and supporting the laser alignment piece 3, and the two optical fiber fixing blocks 6 and 8 and the optical fiber carrying platform 9 are used for fixing and adjusting the position of the optical fiber 7.

The product fixing ring 4, the product supporting rod 2 and the product supporting base 1 are used for fixing and supporting the laser alignment piece 3, the laser alignment piece 3 is used as a simulation piece of the impact piece detonator 12, has the same M10 threaded interface with the impact piece detonator 12, and is provided with a through hole with the diameter of 0.5mm in the central area, so that laser passing along the optical fiber 7 passes through the through hole, and the central area of the impact piece detonator 12 is also provided with a small hole with the diameter of 0.5mm, and when the product fixing ring works, a flying piece flies out of the small hole;

the two optical fiber fixing blocks 6 and 8 and the optical fiber carrying platform 9 are used for fixing and adjusting the position of the optical fiber 7, wherein the two optical fiber fixing blocks 6 and 8 can reliably fix the optical fiber 7 by using semicircular grooves on the surfaces of the two optical fiber fixing blocks, the optical fiber carrying platform 9 is provided with an adjusting knob which can adjust the two optical fiber fixing blocks 6 and 8 arranged on the optical fiber fixing blocks up and down, back and forth and left and right, so that the position of the optical fiber 7 is adjusted, the laser passing along the optical fiber 7 can smoothly pass through a through hole in the central area of the laser alignment part 3, and when a circular light spot appears on a laser verification card arranged at the other end of the laser alignment part 3, the laser passage is proved to be aligned with the through hole of the;

the laser alignment piece 3 is taken down from the product fixing ring 4 and is replaced by the impact sheet detonator 12 with the same thread size, when the impact sheet detonator 12 works, the flyer flying out from the central area of the impact sheet detonator flies along the laser light path, and the flying speed of the flyer can be obtained by collecting the laser signal reflected by the flyer and utilizing the Doppler effect.

The central area of the outer ring surface of the product fixing ring 4 is provided with an external thread M3 along the radial direction for connecting with the product supporting rod 2, and the inner ring of the product fixing ring 4 is provided with an internal thread M10 for connecting with the laser alignment piece 3 or the impact sheet detonator 12.

The laser alignment piece 3 is provided with an external thread of M10, a through hole with the diameter of 0.5mm is arranged in the axial center area, and the hole depth is far beyond the hole diameter.

Both ends of the product supporting rod 2 are provided with M3 external threads which are respectively used for being connected with the product fixing ring 4 and the product supporting base 1.

The outer contour of the product supporting base 1 is a disk with the diameter of 40mm, and the central area of the product supporting base is provided with an M3 internal thread.

The lower surface of optic fibre fixed block 6 and the upper surface of optic fibre fixed block 8 all are provided with semicircular groove along the center pin direction, and the diameter of this recess is 1mm, is provided with M2's screw through-hole at the offside of recess face, hugs closely optic fibre fixed block 6 and 8 to fasten optic fibre fixed block 6 and 8 with the help of M2's screw hole, and then realize that optic fibre 7 is fixed.

The diameter of the inner core of the optical fiber 7 is 0.5mm, the optical fiber is used for transmitting laser, the outer layer is a rubber sleeve, the outer diameter is 1mm, and the inner core is protected.

The optical fiber carrying platform 8 is provided with an adjusting knob, the optical fiber carrying platform 8 can be adjusted vertically, longitudinally and horizontally, and the optical fiber fixing blocks 6 and 8 placed above the optical fiber carrying platform can be adjusted in position.

[ application example ]

The method for measuring the real-time speed of the flyer by adopting the flyer speed measuring platform for the impact sheet detonator 12 is realized by the following steps:

firstly, respectively connecting a product support rod 2 with a product fixing ring 4 and a product support base 1 in a threaded manner, and placing the product support rod on a test bed;

secondly, connecting the laser alignment piece 3 with the product fixing ring 4 in a threaded manner;

thirdly, placing the optical fiber 7 in the semicircular groove of the optical fiber fixing block 6, enabling one end of the optical fiber to be aligned to extend out of the optical fiber fixing block by about 10mm, tightly attaching the two optical fiber fixing blocks 6 and 8, ensuring that the grooves of the two fixing blocks can clamp the optical fiber 7 tightly, and connecting the optical fiber fixing blocks 6 and 8 in a threaded manner by using a long screw of M2;

fourthly, the two optical fiber fixing blocks 6 and 8 are vertically stacked on the optical fiber carrying platform 9, the groove face of the optical fiber fixing block 6 is ensured to face downwards, the groove face of the optical fiber fixing block 8 is ensured to face upwards, and the orientation of the fixing block is adjusted to enable the optical fiber alignment end to face the laser alignment part 3;

fifthly, adjusting a knob on the optical fiber carrying platform 9 to enable the optical fiber alignment end to be close to the small hole of the laser alignment piece 3;

sixthly, opening a laser transmitter/receiver connected with the optical fiber 7, placing a laser verification card 10 at the other end of the laser alignment member 3, and continuously adjusting a knob of the optical fiber carrying platform 9 until a round bright spot 11 appears on the laser verification card, wherein a laser path is coaxial with a through hole of the laser alignment member 3 at the moment as shown in figure 2;

seventhly, taking the laser alignment piece 3 down from the product fixing ring 4, and installing the impact sheet detonator 12 to be tested on the product fixing ring 4, wherein the position of the product supporting base 1 is ensured to be unchanged in the process, and the installation is completed as shown in fig. 3;

and eighthly, opening the laser transmitter/receiver, applying specific pulse energy to the impact sheet detonator 12 to enable the impact sheet detonator to work, outputting a small hole from the impact sheet detonator 12 to fly out a high-speed flyer at the moment, acquiring a laser reflection signal by the laser transmitter/receiver, resolving the reflection signal based on the Doppler effect, and solving the real-time speed of the flyer.