CN109253918A - Shock wave time calibration device and time calibrating method for impact test - Google Patents
Shock wave time calibration device and time calibrating method for impact test Download PDFInfo
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- CN109253918A CN109253918A CN201811284586.3A CN201811284586A CN109253918A CN 109253918 A CN109253918 A CN 109253918A CN 201811284586 A CN201811284586 A CN 201811284586A CN 109253918 A CN109253918 A CN 109253918A
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- 239000000523 sample Substances 0.000 claims abstract description 77
- 239000000758 substrate Substances 0.000 claims abstract description 42
- 238000012360 testing method Methods 0.000 claims abstract description 11
- 230000001052 transient effect Effects 0.000 claims description 12
- 239000000565 sealant Substances 0.000 claims description 7
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
- G01N3/307—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated by a compressed or tensile-stressed spring; generated by pneumatic or hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/001—Impulsive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
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Abstract
The present invention relates to impact-compression loading technical fields, more particularly to a kind of shock wave time calibration device and time calibrating method for impact test, including controllable hypervelocity launcher, target chamber and signal collection device, the target chamber is vacuum target chamber, experimental test target is provided in target chamber, the experimental test target includes substrate, fixed column, light probe and electric probe, luminous gap is provided between the substrate and fixed column, light probe, electric probe are connect with signal collection device respectively, and the controllable hypervelocity launcher hits the left side side wall of substrate for driven flyer plates.The present invention compares and analyzes two kinds of waveforms that the signal detected according to electric probe and light probe generates, more accurate Wave data figure is selected finally to judge that shock wave enters the time point of sample, can very simple shock wave enter this important parameter of the time point of sample and carry out more accurate calibration so that subsequent experimental data are more reliable effective.
Description
Technical field
The present invention relates to impact-compression loading technical fields, and in particular to a kind of shock wave time mark for impact test
Determine device and time calibrating method.
Background technique
Dynamic ultrahigh pressure technique and its theory are mature in World War II Later development.Its task is usually
Study mechanical property of solid target under the conditions of dynamic super-voltage.
When extremely strong shock wave (i.e. shock wave) is propagated in medium (referring mainly to solid), the pressure, density, temperature of medium can be made
Change dramatically occurs for the state parameters such as degree.This state is known as dynamic ultrahigh pressure condition, and the technology for generating strong shock wave is known as moving
State superhigh pressure technique.Dynamic ultrahigh pressure technique is in equation of state measurement, artificial synthesized new material (such as diamond), earth interior knot
Structure research, initiation by impact mechanism, aerolite are studied at hole and destruction and armour-piercing to spacecraft, penetration, explosive processing etc.
It is an important technology in work, is widely used in solid-state physics, astrophysics, geophysics, Solid-state Chemistry, explosive force
In the research work of the subjects such as, military science and many industrial technologies.
Gas Gun is a kind of dynamic high pressure loading device to grow up on the basis of cannon loading technique.Cannon device is simple
But can be born due to powder chamber pyrophoric ignition when peak pressure it is limited, the average pressure that general cannon bullet bottom allows
No more than 150MPa, therefore the speed adjustable range of bullet is very small, can only achieve 1km/s~2km/s.And Gas Gun overcomes
This is difficult, and Gas Gun can emit bullet of various shapes, and material, quality, size and the speed of bullet have biggish selection
Range.More prominent advantage is that bullet is obtained with higher under the lower acceleration of receiving or compared with the driving of low stress
Speed, therefore the driving of gas big gun has biggish versatility, is one of current most common technology of China's dynamic pressure loading technique.
The more mature Gas Gun technology in China mainly has one-stage light-gas gun, two-stage light gas gun and the light gas of three-level at present
Big gun.In gas big gun Shock Compression Experiments, the time point that shock wave enters sample is a very important parameter, this is for solving
The analysis of shock wave velocity of wave and follow-up data has very important meaning.Method currently used for judging this time point is usual
It is the experimental signal collected using signal processing apparatus such as oscillographs on experimental test target, passes through the waveform being collected on analysis oscillograph
Information judges.Usually there are two types of methods, collect sample surfaces using optical fiber one is the principle using shock-wave luminescence and impact light
Signal, another kind is access optical cable, to collect electric signal.Finally trip point on the waveform that is collected into using oscillograph is sentenced
Disconnected shock wave enters the time of sample.Two methods respectively have superiority and inferiority, in conditions such as experimental material, experiment purpose and precisions
In the case where difference, two methods, which measure the data come, to differ widely, in order to keep experimental data more accurate, for impact
The calibration that wave enters the time point of sample is necessary.
For this purpose, the present invention provides, a kind of apparatus structure is simple, and scaling method is convenient, the shock wave time for impact test
Caliberating device and time calibrating method.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of shock wave time marks for impact test
Determine device and time calibrating method, apparatus structure is simple, and scaling method is convenient, the letter that will be detected according to electric probe and light probe
Number two kinds of waveforms generated compare and analyze, and select more accurate Wave data figure finally to judge that shock wave enters sample
Time point, can very simple shock wave enter this important parameter of the time point of sample and carry out more accurate mark
It is fixed, so that subsequent experimental data are more reliable effective.
The purpose of the present invention is achieved through the following technical solutions:
A kind of shock wave time calibration device for impact test, including controllable hypervelocity launcher, target chamber and signal
Collection device, the target chamber are vacuum target chamber, are provided with experimental test target in target chamber, and the experimental test target includes substrate, fixed column, at least
A piece light probe and at least two electric probes, the fixed column are arranged in the right sidewall of substrate, the substrate and fixation
Luminous gap is provided between column, one end of the light probe, one end of electric probe are each passed through fixed column and connect with luminous gap, light
The other end of probe, the other end of electric probe are connect with signal collection device respectively, and the controllable hypervelocity launcher is for driving
Dynamic film flying hits the left side side wall of substrate.
Further, the substrate is conductive metal.
Further, the size of the luminous gap is 5~20 microns.
Further, the controllable hypervelocity launcher is the controllable hypervelocity launcher with speed measuring function.
Further, the controllable hypervelocity launcher is Gas Gun.
Further, the controllable hypervelocity launcher includes loading device and transmitting tube, and the nozzle of the transmitting tube is set
It is equipped with magnetic survey speed variator, the loading device is hit along transmitting tube to substrate for driven flyer plates.The magnetic survey speed variator is used for
Detect the initial velocity of film flying.
Further, the signal collection device includes transient high temperature meter, DC power supply and oscillograph, the transient high temperature
One end of meter is connect with light probe, and the other end of transient high temperature meter is connect with oscillograph, one end of the DC power supply and electrical resistivity survey
Needle connection, the other end of DC power supply are connect with oscillograph.
Further, the shock wave time calibration device include multiple symmetrically arranged light probes and it is multiple be symmetrical arranged
Electric probe.
Further, the fixed column is detachably connected with substrate.
Further, the connecting pin of the fixed column and substrate is additionally provided with sealant, and the sealant is for preventing from sending out
Light slit light leakage.
A kind of shock wave time calibrating method for impact test, is marked by above-mentioned shock wave time calibration device
It is fixed.
A kind of shock wave time calibrating method for impact test, specifically: it is driven by controllable hypervelocity launcher
Film flying hits the left side side wall of substrate, and film flying and substrate collision generate shock wave, and before shock wave enters sample, light probe receives electricity
Signal is simultaneously transferred to signal collection device, while colliding so that electric probe and substrate are connected, and generation electric signal, electric signal is by electrical resistivity survey
Needle is transferred to signal collection device, generates corresponding two kinds of waveforms according to two kinds of electrical signal datas that signal collection device is collected into
Curve, selection signal is more stable, can accurately read the Wave data figure of trip point finally judges that shock wave enters sample
Time point.
The working principle of the invention: give film flying using Gas Gun makes it and experimental test target collision generate wink with high speed
When high pressure, while generating shock wave, when luminous gap before shock wave enters sample, thump, which issues light slit, can generate light letter
Number, while colliding so that electric probe and substrate are connected, the DC power supply that such substrate will be accessed with electric probe forms one and returns
Road generates corresponding electric signal, and is transferred to oscillograph；And light probe is identical as electric probe installation site, and shock wave exists
The propagation time in luminous gap is nanosecond rank, be can be ignored, it is possible to think the synchronous triggering of the two；What collision generated
Shock wave access transient high temperature meter after entering the luminous signal before sample and being received by light probe converts optical signal into electric signal,
And electric signal is then directly received by optical cable；Transient high temperature meter, DC power supply are connect with oscillograph respectively, are received by oscillograph whole
The electric signal of a process, and wavy curve is generated on oscillograph, then two kinds of waveforms are compared and analyzed, selection signal is more
Wave data figure that is stable, can accurately reading trip point finally judges that shock wave enters the time point of sample.
The beneficial effects of the present invention are: shock wave time calibration device and time calibrating side of the present invention for impact test
Method, apparatus structure is simple, and scaling method is convenient, on the one hand, using collision so that electric probe and substrate are connected, such substrate will
A circuit is formed with the DC power supply of electric probe access, generates corresponding electric signal, which is received by oscillograph, will be touched
The shock wave for hitting generation accesses transient high temperature meter after entering the luminous signal before sample and being received by light probe and turns optical signal
Electric signal is turned to, and is transferred to oscillograph, oscillograph generates wavy curve according to the signal that electric probe and light probe detect, then
Two kinds of waveforms are compared and analyzed, select more accurate Wave data figure finally to judge that shock wave enters the time of sample
Point, can very simple shock wave enter this important parameter of the time point of sample and carry out more accurate calibration so that
Subsequent experimental data are more reliable effective.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of shock wave time calibration device of the present invention；
Fig. 2 is the attachment structure schematic diagram of experimental test target of the present invention and signal collection device；
In figure, the controllable hypervelocity launcher of 1-, 2- target chamber, 3- signal collection device, 4- loading device, 5- transmitting tube, 6-
Magnetic survey speed variator, 7- experimental test target, 8- film flying, 9- substrate, 10- fixed column, 11- light probe, 12- electric probe, 13- transient high temperature
Meter, 14- DC power supply, 15- oscillograph, 16- shine gap, 17- sealant.
Specific embodiment
Technical solution of the present invention is described in further detail with reference to the accompanying drawing, but protection scope of the present invention is not limited to
It is as described below.
Embodiment
A kind of shock wave time calibration device for impact test, as depicted in figs. 1 and 2, including controllable transmitted at high speed
Device 1, target chamber 2 and signal collection device 3, the target chamber 2 are vacuum target chamber, are provided with experimental test target 7, the experiment in target chamber 2
Target 7 includes substrate 9, fixed column 10, at least one light probe 11 and at least two electric probes 12, and the fixed column 10 is arranged
(certainly, fixed column 10 also can be set on the left side side wall of substrate 9, when it is arranged in substrate in the right sidewall of substrate 9
When 9 left side side wall, subsequent controllable hypervelocity launcher 1 hits the right sidewall of substrate 9 for driven flyer plates 8.), it is described
Luminous gap 16 is provided between substrate 9 and fixed column 10, one end of the light probe 10, one end of electric probe 11 are each passed through solid
Fixed column 10 is connect with luminous gap 16, and the other end of light probe 11, the other end of electric probe 12 connect with signal collection device 3 respectively
It connects, the controllable hypervelocity launcher 1 hits the left side side wall of substrate 9 for driven flyer plates 8.
Specifically, the substrate 9 is conductive metal.
Specifically, the size of the luminous gap 16 is 5~20 microns.
Specifically, the controllable hypervelocity launcher 1 is the controllable hypervelocity launcher 1 with speed measuring function.
Specifically, the controllable hypervelocity launcher 1 is Gas Gun.
Specifically, the controllable hypervelocity launcher 1 includes loading device 4 and transmitting tube 5, the nozzle of the transmitting tube 5
It is provided with magnetic survey speed variator 6, the loading device 1 is hit along transmitting tube 5 to substrate 9 for driven flyer plates 8.The magnetic survey quick-mounting
6 are set for detecting the initial velocity of film flying 8.
Specifically, the signal collection device 1 includes transient high temperature meter 13, DC power supply 14 and oscillograph 15, the wink
One end of state pyrometer 13 is connect with light probe 10, and the other end of transient high temperature meter 13 is connect with oscillograph 15, the direct current
The one end in source 14 is connect with electric probe 12, and the other end of DC power supply 14 is connect with oscillograph 15.
Specifically, the shock wave time calibration device include multiple symmetrically arranged light probes 11 and it is multiple be symmetrical arranged
Electric probe 12.
Specifically, the fixed column 10 is detachably connected with substrate 9.
Specifically, the connecting pin of the fixed column 10 and substrate 9 is additionally provided with sealant 17, and the sealant 17 is for preventing
Only shine 16 light leakage of gap.
A kind of shock wave time calibrating method for impact test, specifically: it is driven by controllable hypervelocity launcher 1
Film flying 8 hits the left side side wall of substrate 9, and film flying 8 and the collision of substrate 9 generate shock wave, before shock wave enters sample, light probe 10
It receives electric signal and is transferred to signal collection device 3, while colliding so that electric probe 11 and the connection of substrate 9, generate electric signal, electricity
Signal is transferred to signal collection device 3 by electric probe 11, is generated according to two kinds of electrical signal datas that signal collection device 3 is collected into
Corresponding two kinds of wavy curves, selection signal is more stable, can accurately read the Wave data figure of trip point finally judges to rush
Hit the time point that wave enters sample.
The above is only a preferred embodiment of the present invention, it should be understood that the present invention is not limited to described herein
Form should not be regarded as an exclusion of other examples, and can be used for other combinations, modifications, and environments, and can be at this
In the text contemplated scope, modifications can be made through the above teachings or related fields of technology or knowledge.And those skilled in the art institute into
Capable modifications and changes do not depart from the spirit and scope of the present invention, then all should be in the protection scope of appended claims of the present invention
It is interior.
Claims (10)
1. a kind of shock wave time calibration device for impact test, which is characterized in that including controllable hypervelocity launcher, target
Room and signal collection device, target chamber is interior to be equipped with experimental test target, and the experimental test target includes substrate, fixed column, light probe and electric probe, institute
Fixed column is stated to be arranged in the right sidewall of substrate, between the substrate and fixed column be equipped with shine gap, the one of the light probe
It holds, one end of electric probe is each passed through fixed column and connect with luminous gap, the other end of light probe and the other end difference of electric probe
It is connect with signal collection device, the controllable hypervelocity launcher hits the left side side wall of substrate for driven flyer plates.
2. the shock wave time calibration device according to claim 1 for impact test, which is characterized in that the substrate
For conductive metal.
3. the shock wave time calibration device according to claim 1 for impact test, which is characterized in that described to shine
The size of gap is 5~20 microns.
4. the shock wave time calibration device according to claim 1 for impact test, which is characterized in that described controllable
Hypervelocity launcher is controllable hypervelocity launcher or Gas Gun with speed measuring function.
5. the shock wave time calibration device according to claim 1 for impact test, which is characterized in that the target chamber
For vacuum target chamber, the light probe is at least provided with one, and the electric probe is at least provided with two.
6. the shock wave time calibration device according to claim 1 for impact test, which is characterized in that the signal
Collection device includes transient high temperature meter, DC power supply and oscillograph, and one end of the transient high temperature meter is connect with light probe, transient state
The other end of pyrometer is connect with oscillograph, and one end of the DC power supply is connect with electric probe, the other end of DC power supply with
Oscillograph connection.
7. the shock wave time calibration device according to claim 1 for impact test, which is characterized in that the fixation
Column is detachably connected with substrate.
8. the shock wave time calibration device according to claim 1 for impact test, which is characterized in that the fixation
The connecting pin of column and substrate is additionally provided with sealant, and the sealant is for preventing the gap light leakage that shines.
9. a kind of shock wave time calibrating method for impact test, which is characterized in that any one by claim 1~8
The item shock wave time calibration device is demarcated.
10. the shock wave time calibrating method according to claim 9 for impact test, which is characterized in that specific
Shock wave time calibrating method are as follows: the left side side wall of substrate, film flying and base are hit by controllable hypervelocity launcher driven flyer plates
Plate collision generates shock wave, and before shock wave enters sample, light probe receives electric signal and is transferred to signal collection device, touches simultaneously
It hits so that electric probe and substrate are connected, generation electric signal, electric signal is transferred to signal collection device by electric probe, is received according to signal
Two kinds of electrical signal datas that acquisition means are collected into generate corresponding two kinds of wavy curves, and selection signal is more stable, can accurately read
The Wave data figure of trip point finally judges that shock wave enters the time point of sample out.
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| CN201811284586.3A CN109253918B (en) | 2018-10-31 | 2018-10-31 | Shock wave time calibration device and time calibration method for shock test |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110220775A (en) * | 2019-06-21 | 2019-09-10 | 西南交通大学 | The measuring device of sample transmission rate under a kind of Impulsive load based on light-gas gun |
| CN111366482A (en) * | 2020-03-27 | 2020-07-03 | 山西采薇集能科技有限公司 | Dynamic high-speed loading ejection device |
| CN111537055A (en) * | 2020-05-18 | 2020-08-14 | 商丘师范学院 | Experimental device and experimental method for arranging ultrahigh-pressure shock wave measurement probes |
| CN112326408A (en) * | 2020-10-09 | 2021-02-05 | 南京理工大学 | System and method for measuring wave velocity of solid medium under confining pressure state |
| CN113281197A (en) * | 2021-05-13 | 2021-08-20 | 中物院成都科学技术发展中心 | Vertical light gas gun capable of moving in multiple dimensions |
| CN113532783A (en) * | 2021-07-12 | 2021-10-22 | 中山大学 | Space environment ultra-high-speed impact test device and method |
| CN114018730A (en) * | 2022-01-10 | 2022-02-08 | 西南交通大学 | Convenient speed measurement target device based on solid particles under light gas gun impact loading |
| CN114778058A (en) * | 2022-06-20 | 2022-07-22 | 中国飞机强度研究所 | Control method of gas circuit system of secondary air cannon for high-speed impact test of airplane structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110220775A (en) * | 2019-06-21 | 2019-09-10 | 西南交通大学 | The measuring device of sample transmission rate under a kind of Impulsive load based on light-gas gun |
| CN111366482A (en) * | 2020-03-27 | 2020-07-03 | 山西采薇集能科技有限公司 | Dynamic high-speed loading ejection device |
| CN111537055A (en) * | 2020-05-18 | 2020-08-14 | 商丘师范学院 | Experimental device and experimental method for arranging ultrahigh-pressure shock wave measurement probes |
| CN112326408A (en) * | 2020-10-09 | 2021-02-05 | 南京理工大学 | System and method for measuring wave velocity of solid medium under confining pressure state |
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| CN113532783A (en) * | 2021-07-12 | 2021-10-22 | 中山大学 | Space environment ultra-high-speed impact test device and method |
| CN113532783B (en) * | 2021-07-12 | 2022-06-28 | 中山大学 | Space environment ultra-high speed impact test device and method |
| CN114018730A (en) * | 2022-01-10 | 2022-02-08 | 西南交通大学 | Convenient speed measurement target device based on solid particles under light gas gun impact loading |
| CN114778058A (en) * | 2022-06-20 | 2022-07-22 | 中国飞机强度研究所 | Control method of gas circuit system of secondary air cannon for high-speed impact test of airplane structure |
| CN114778058B (en) * | 2022-06-20 | 2022-09-02 | 中国飞机强度研究所 | Control method of gas circuit system of secondary air cannon for high-speed impact test of airplane structure |
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