CN204694725U - The determinator of Hopkinson pressure bar system take-off lever speed - Google Patents
The determinator of Hopkinson pressure bar system take-off lever speed Download PDFInfo
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- CN204694725U CN204694725U CN201520403151.1U CN201520403151U CN204694725U CN 204694725 U CN204694725 U CN 204694725U CN 201520403151 U CN201520403151 U CN 201520403151U CN 204694725 U CN204694725 U CN 204694725U
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Abstract
Description
技术领域 technical field
本实用新型属于测量装置技术领域,尤其是涉及一种霍普金森压杆系统输出杆速度的测定装置。 The utility model belongs to the technical field of measuring devices, in particular to a measuring device for output rod speed of a Hopkinson pressure rod system.
背景技术 Background technique
目前,分离式霍普金森杆是一种研究一维应力状态下材料动态力学性能的有效实验置。自从 1949 年 Kolsky 发明它并用其研究一维应力状态下材料动态力学性能以来该实验装置已有很多改进,实验技术不断提高。常规的霍普金森压杆试验装置只有一套测速系统,即在输入杆部分,通过测得的速度计算出输入杆的动能,也就是整个系统的总能量,而输出杆的能量需要从计算机获得的图谱分析得到,二者的差值就是作用于实验试件的能量,但是由于系统误差和人为误差的存在,对损失的能量分析必将带来一定的错误和误差。尤其是霍普金森压杆试验装置不能准确方便获得输出杆能量,使实验结果的误差更大。 At present, split Hopkinson bar is an effective experimental setup to study the dynamic mechanical properties of materials under one-dimensional stress state. Since Kolsky invented it in 1949 and used it to study the dynamic mechanical properties of materials under one-dimensional stress state, the experimental device has been improved a lot, and the experimental technology has been continuously improved. The conventional Hopkinson pressure bar test device has only one set of speed measurement system, that is, in the input rod part, the kinetic energy of the input rod is calculated through the measured speed, that is, the total energy of the whole system, and the energy of the output rod needs to be obtained from the computer The difference between the two is the energy acting on the experimental specimen. However, due to the existence of systematic errors and human errors, the analysis of the lost energy will inevitably bring certain errors and errors. In particular, the Hopkinson compression rod test device cannot accurately and conveniently obtain the output rod energy, which makes the error of the experimental results larger.
发明内容 Contents of the invention
本实用新型的目的是提供一种能够方便准确测定输出杆能量的霍普金森压杆系统输出杆速度的测定装置,该装置能够在原有测量数据基础上测量输出杆的速度,能够更加地准确表示能量在霍普金森压杆试验中的分布,从而指导实际工程的炸药与岩石能量匹配问题。 The purpose of this utility model is to provide a measuring device for the speed of the output rod of the Hopkinson pressure rod system that can conveniently and accurately measure the energy of the output rod. The device can measure the speed of the output rod on the basis of the original measurement data, and can express The distribution of energy in the Hopkinson pressure bar test can guide the energy matching of explosives and rocks in actual engineering.
本实用新型的目的是通过下述技术方案来实现的: The purpose of this utility model is achieved through the following technical solutions:
本实用新型的霍普金森压杆系统输出杆速度的测定装置,其特征在于在霍普金森压杆系统输出杆末端和吸收杆之间设有一个激光测速装置,此激光测速装置包括激光触发器,固定此激光触发器的两个触发装置的测速装置主体。 The measuring device for the speed of the output rod of the Hopkinson pressure rod system of the utility model is characterized in that a laser speed measuring device is arranged between the end of the output rod of the Hopkinson pressure rod system and the absorbing rod, and the laser speed measuring device includes a laser trigger , the main body of the speed measuring device that fixes the two triggering devices of this laser trigger.
所述的测速装置主体包括与霍普金森实验装置底座固定的主体支座,固定在此主体支座上端的固定装置,所述的主体支座上端中部设有凹槽,在此凹槽两侧分别设有一个下半圆孔,所述的固定装置上设有两个上半圆孔,所述的两个上半圆孔和两个下半圆孔分别组成两个圆孔,激光触发器的发射器端头和接收器端头分别被固定在此两个圆孔内,霍普金森压杆系统输出杆贯穿于所述的凹槽内。 The main body of the speed measuring device includes a main body support fixed to the base of the Hopkinson experimental device, and a fixing device fixed on the upper end of the main body support. A lower semicircle hole is provided respectively, and two upper semicircle holes are provided on the fixing device, and the two upper semicircle holes and the two lower semicircle holes respectively form two circular holes, and the emitter end of the laser trigger The head and the receiver end are respectively fixed in the two round holes, and the output rod of the Hopkinson pressure rod system passes through the groove.
本实用新型的优点: Advantage of the utility model:
本实用新型的霍普金森压杆系统输出杆速度的测定装置具有高度的实用价值,可以在保证试验结果的情况下,提高实验精度、降低实验难度,准确得到能量的损耗部分,为霍普金森压杆试验的改进有独到的创新特色。 The measuring device of the output rod speed of the Hopkinson pressure rod system of the utility model has a high practical value, can improve the experimental accuracy, reduce the difficulty of the experiment, and accurately obtain the loss part of the energy under the condition of ensuring the test results, which is the Hopkinson The improvement of the compression bar test has unique innovative features.
附图说明 Description of drawings
图1为本实用新型的结构示意图。 Fig. 1 is the structural representation of the utility model.
图2为本实用新型图1的A向视图。 Fig. 2 is the A-direction view of Fig. 1 of the present utility model.
具体实施方式 Detailed ways
下面结合附图进一步说明本实用新型的具体实施方式。 Further illustrate the specific embodiment of the present utility model below in conjunction with accompanying drawing.
如图1和2所示,本实用新型的霍普金森压杆系统输出杆速度的测定装置,其特征在于在霍普金森压杆系统输出杆1末端和吸收杆5之间设有一个激光测速装置,此激光测速装置包括激光触发器8,固定此激光触发器8的两个触发装置的测速装置主体。 As shown in Figures 1 and 2, the measuring device for the speed of the output rod of the Hopkinson pressure rod system of the present invention is characterized in that a laser speed measuring device is provided between the end of the output rod 1 of the Hopkinson pressure rod system and the absorbing rod 5 device, the laser speed measuring device includes a laser trigger 8, and fixes the main body of the speed measuring device of the two triggering devices of the laser trigger 8.
所述的测速装置主体包括与霍普金森实验装置底座固定的主体支座7,固定在此主体支座7上端的固定装置3,所述的主体支座7上端中部设有凹槽6,在此凹槽6两侧分别设有一个下半圆孔,所述的固定装置上设有两个上半圆孔,所述的两个上半圆孔和两个下半圆孔分别组成两个圆孔,激光触发器的发射器端头2和接收器端头4分别被固定在此两个圆孔内,霍普金森压杆系统输出杆1贯穿于所述的凹槽6内。 The main body of the speed measuring device includes a main body support 7 fixed to the base of the Hopkinson experimental device, and a fixing device 3 fixed on the upper end of the main body support 7. The middle part of the upper end of the main body support 7 is provided with a groove 6. Both sides of the groove 6 are respectively provided with a lower semicircle hole, and the fixing device is provided with two upper semicircle holes, and the two upper semicircle holes and the two lower semicircle holes form two circular holes respectively, and the laser The transmitter end 2 and the receiver end 4 of the trigger are respectively fixed in the two circular holes, and the output rod 1 of the Hopkinson pressure rod system passes through the groove 6 .
本实用新型在已有的霍普金森实验装置的基础上进行改进,采取的方式是在霍普金森压杆系统输出杆1的末端安装激光测速装置,固定激光触发器的两个触发装置。激光触发器之间有一个信号的时间差,其值为霍普金森压杆系统输出杆1通过激光测速装置(激光发射器和激光接收器组成)测量运动时间间隔T,测量二者之间的距离L,由于激光器之间的距离短,且时间比较短,根据微分原理,可以将此瞬时速度近似的认为是平均速度,可用距离L和时间T的比值来表示这一速度V,在已知杆子的质量M,求出输出杆末端的动量P,进而求得动能E。这样就能得出剩余能量E’。具体的理论公式如下: The utility model is improved on the basis of the existing Hopkinson experimental device. The method adopted is to install a laser speed measuring device at the end of the output rod 1 of the Hopkinson pressure rod system, and fix two trigger devices of the laser trigger. There is a signal time difference between the laser triggers, and its value is the output rod 1 of the Hopkinson pressure rod system. The movement time interval T is measured by the laser speed measuring device (composed of a laser transmitter and a laser receiver), and the distance between them is measured. L, because the distance between the lasers is short and the time is relatively short, according to the differential principle, this instantaneous speed can be considered as the average speed, and the speed V can be expressed by the ratio of the distance L to the time T. The mass M of the output rod is calculated to obtain the momentum P at the end of the output rod, and then the kinetic energy E is obtained. This yields the remaining energy E'. The specific theoretical formula is as follows:
(1) (1)
(2) (2)
(3) (3)
式中:V—输出杆的速度,m/s。 In the formula: V—the speed of the output rod, m/s.
L—触发器之间的距离,m。 L—the distance between triggers, m.
T—触发器时间所记录的时间差,s。 T—the time difference recorded by the trigger time, s.
P—输出杆的动量,kg·m/s。 P - The momentum of the output rod, kg m/s.
E—输出杆的能量,J。 E—the energy of the output rod, J.
在此激光测速装置中,霍普金森压杆系统输出杆1正好能从测速装置之间通过,霍普金森压杆系统输出杆1的中心高度和测速装置的中心高度在同一水平上;测速装置可以准确测量霍普金森压杆系统输出杆1的速度,通过物理公式和能量图谱分析,得到能量在整个系统的分配情况,进而来研究岩石与炸药能量的匹配。本实用新型的霍普金森压杆系统输出杆速度的测定装置具有高度的实用价值,可以在保证试验结果的情况下,提高实验精度、降低实验难度,准确得到能量的损耗部分,为霍普金森压杆试验的改进有独到的创新特色。 In this laser speed measuring device, the output rod 1 of the Hopkinson pressure rod system can just pass between the speed measuring devices, and the center height of the output rod 1 of the Hopkinson pressure rod system is at the same level as the center height of the speed measuring device; the speed measuring device The speed of the output rod 1 of the Hopkinson pressure rod system can be accurately measured, and the distribution of energy in the entire system can be obtained through physical formula and energy map analysis, and then the matching of rock and explosive energy can be studied. The measuring device of the output rod speed of the Hopkinson pressure rod system of the utility model has a high practical value, can improve the experimental accuracy, reduce the difficulty of the experiment, and accurately obtain the loss part of the energy under the condition of ensuring the test results, which is the Hopkinson The improvement of the compression bar test has unique innovative features.
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106771330A (en) * | 2017-01-16 | 2017-05-31 | 李嘉雯 | For the INTELLIGENT TACHOMETER of Hopkinson pressure bar experiment |
CN110987666A (en) * | 2019-11-20 | 2020-04-10 | 南京理工大学 | A Method to Eliminate Part of System Error in SHPB Experiment |
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2015
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106771330A (en) * | 2017-01-16 | 2017-05-31 | 李嘉雯 | For the INTELLIGENT TACHOMETER of Hopkinson pressure bar experiment |
CN106771330B (en) * | 2017-01-16 | 2018-04-13 | 李嘉雯 | INTELLIGENT TACHOMETER for Hopkinson pressure bar experiment |
CN110987666A (en) * | 2019-11-20 | 2020-04-10 | 南京理工大学 | A Method to Eliminate Part of System Error in SHPB Experiment |
CN110987666B (en) * | 2019-11-20 | 2022-03-15 | 南京理工大学 | A Method to Eliminate Part of System Error in SHPB Experiment |
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Address after: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee after: ANSTEEL GROUP MINING Co.,Ltd. Address before: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee before: Ansteel Group Mining Co.,Ltd. |
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Granted publication date: 20151007 |