CN104677754B - A kind of material rotary impact response characteristic test system - Google Patents
A kind of material rotary impact response characteristic test system Download PDFInfo
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- CN104677754B CN104677754B CN201510107433.1A CN201510107433A CN104677754B CN 104677754 B CN104677754 B CN 104677754B CN 201510107433 A CN201510107433 A CN 201510107433A CN 104677754 B CN104677754 B CN 104677754B
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Abstract
The present invention relates to a kind of material rotary impact response characteristic test system, the system includes（i）Rotation with impact unit,（ii）Data acquisition unit and（iii）Data analysis unit, the present invention can be used for the material property tested under rotary impact and the effect of one impulse impulsive load, such as percussion drilling, rotary impact drilling and the shock effect in rotary drilling and other rotary impact loads, by testing the stress wave characteristic in input lever, the structure and strength characteristics of material can reveal that.In turn, it can also be used to the planform and material property of research impact bullet, with the incident waveform and execution obtained.
Description
Technical field
The present invention relates to a kind of material rotary impact response characteristic test system, one kind is used for test material in rotation-punching
The measuring technology for the response characteristic hit under load, the dynamic available for the material under different impact loads and different rotary speed are strong
Spend and enter, instead, transmission stress wave sharp peaks characteristic and energy feature test and analysis, can be used to study load-bearing material structure
With dynamics；It can also be used for impacting the test of load characteristic under different impact speeds, belong to material and Geotechnical Engineering field.
Background technology
At present, in the production such as the prospectings such as geology, Geotechnical Engineering and mineral engineering, it usually needs using drilling/spy side
Method, its main drilling method are impact type, rotary or rotation-impact type.Geological materials are broken under rotary impact load
Relation, earth formation and strength characteristics and the relation of load characteristic between broken effect and load characteristic, and material resistance are high
The destruction characteristic of the rotary pulsed load such as fly bomb of speed etc., is required for structure and dynamics of the test material under rotary impact load
Characteristic.
In the test of material kinetics response characteristic, split hopkinson press bar（separate Hopkinson
pressure bar: SHPB）It is the basic skills of research material high strain-rate mechanical response, it is by determining material certain
Dynamic stress-coping behavior of strain rate scope analyzes the strain-stress relation of sample material, and its basis is linear elasticity fluctuation
It is theoretical.Since B. Hopkinson in 1914 establish this method, by the man-based developments such as Davies, Kolsky, SHPB technologies
The handling of shaping, disperse in Loaded contact analysis, the loading of controllable dipulse etc. make significant progress, and can not only measure test specimen
Dynamic compression strength under impact load, and the dynamic tensile strength of test specimen can be measured.Because SHPB technologies can obtain
Obtain the pressure pulse in test specimen, deformation and test specimen stress of the calculation testing piece under impact load, it has also become material kinetics respond
Simple, effective method in terms of test, thus be at home and abroad widely used, and it is increasingly becoming material kinetics response
Standard method of test.
But SHPB has the following disadvantages：（1）Rotary impact can not be carried out, i.e., can not apply rotary pulsed load；（2）
The impact end of input lever is free end, and input lever can not apply static pressure；（3）SHPB basis is linear elasticity wave theory, is being asked
Bar and sample all should meet the primary condition of one-dimensional line elastomer in requirement system when solving strain-stress relation.However, a lot
In the case of, load-bearing body phase is the unsymmetric structure of non-linear body for impulsive load adding carrier.As explored or producing drilling
When, bottom hole rock mass is infinitely great non-linear body；Projectile flight impacting object falls within non-linear, asymmetrical situation.Belong to
The situation of non-linear body+linear bar, it is impossible to which simple utilization linear elasticity wave theory calculates and the strength characteristics of analysis of material.
Principle of the present invention based on impact and rotation-impact grinding rock, on the basis of SHPB, research and development kit rotation
Turn-impact individual features test system, entered by measuring drift prompt pulse speed, impact energy and impact bar/reflect stress
Ripple, analyze the structure and strength characteristics of load-bearing material.Meanwhile by setting biomaterials, test and analyze different triggering pressure
The relation of low punch geometry feature, penetration performance and impulsive load characteristic.
The content of the invention
In order to solve the above problems, it is an object of the invention to provide one kind to overcome in current material kinetic test system not
Rotary pulsed loading can be implemented and apply material rotation-shock response test system of the limitations such as axial dead load to input lever
System.
The technical scheme is that：A kind of material rotation-shock response characteristic test system, the system include（i）Rotation
Turn with impact unit,（ii）Data acquisition unit and（iii）Data analysis unit,
The rotation is made up of with impact unit system platform, impulse generating unit, load sample storehouse and rotary unit；
The impulse generating unit is by pressure source, pressure regulator, impulse sender, pulse shaper, switching valve, momentum
Trapper and test club composition；
The load sample storehouse is carrying sample；
The rotary unit is made up of electric rotating machine, speed regulator and output shaft；
The data acquisition unit is by pressure sensor, strain transducer, laser velocimeter sensor, speed probe, number
Formed according to boxcar, dynamic strain indicator and data integration case；
The data analysis unit, the data of the conversion and digital integration are arrived through data-interface and cable transmission described in
Data analysis unit is analyzed, stored and exported, and the structure and physico mechanical characteristic of material are analyzed；
Wherein, the system platform is horizontal stiffness support, is directly installed on level ground, the impulse sender,
Momentum trapper and test club are fixedly mounted on the horizontal stiffness support；Pressure source is air compressor machine, and air compressor machine passes through pressure
Pipe network and pressure regulator UNICOM, are demarcated, pressure sensor is arranged in pressure regulator pipeline by the master gauge of adjuster
The front of pressure gauge in input I- output O loops, by coupling head and pipeline UNICOM, the pressure regulator passes through pipeline and institute
State impulse sender UNICOM, impulse sender, pulse shaper, switching valve, momentum line trap, test club, drill bit, load sample storehouse and
Speed regulator is located on same level axis, and the pulse shaper, switching valve, momentum line trap, test club are from left to right successively
Connection, strain transducer are arranged on the test club, and the one end in the load sample storehouse connects firmly with output shaft, and output shaft passes through rotating speed
Adjuster is connected firmly with electric rotating machine, and the laser velocimeter sensor being made up of the receiver of laser beam emitting head and laser sensor is set
Between impulse sender and switching valve, probe be arranged on the load sample storehouse on, speed probe be arranged on on load sample storehouse
Corresponding to probe on position, strain transducer is connected with pressure sensor by cable, interface and data conversion box data, data
Boxcar is connected with Digital Dynamic Strain Gauge data, and Digital Dynamic Strain Gauge is connected with data integration case data；Tachogenerator
Data integration case is accessed through cable with speed probe, data integration case will be transported to data analysis unit, institute after data integration
Stating data analysis unit includes remote terminal, other terminals, computer and printer.
Further, the load sample storehouse is rigid cylindrical cylinder, and its base couples with the output shaft of speed regulator 11, root in load sample storehouse
Size of sample is provided with load sample set storehouse, sample, the mismatch error between specimen finish and set storehouse internal diameter are installed in load sample set storehouse
And axiality should meet the requirement about testing of materials, the axial length in load sample storehouse is more than sample set storehouse and specimen length, surpassed
The length gone out should meet that sample impacts the security protection requirement splashed during fragmentation.
Further, the operating voltage of the electric rotating machine is 380V.
Further, the operating voltage of the digital dynamic strain indicator is 220V.
Further, the operating voltage of the laser velocimeter is 220V.
Further, the operating voltage of the data integration box is DC12V.
The invention has the advantages that due to using above-mentioned technical proposal, on the one hand, can have rotation with impact load
Effect combines, under rotation-impact coupling load the compression strength of test material, enter the/dynamic such as reflection stress wave peak value, strain energy
Mechanical response characteristic parameter；Meanwhile test material dynamic response feature and trip rod or the relation of bullet impact energy.The opposing party
Face, when the speed of rotation is arranged to 0, the MATERIALS ' DYNAMIC characteristic test under one impulse impulsive load can be achieved, obtain material and rushing
The physico mechanical characteristic hit under load.
The present invention can be used for the material property tested under rotation-impact and the effect of one impulse impulsive load, such as rush
Drilling, rotation-percussion drilling and shock effect and other rotation-impact loads in rotary drilling are hit, it is defeated by testing
Enter the stress wave characteristic in bar, can reveal that the structure and strength characteristics of material.In turn, it can also be used to research impact bullet
Planform and material property, with the incident waveform and execution obtained.
Brief description of the drawings
Fig. 1 is the construction block diagram of material rotary impact response characteristic test system of the present invention.
Fig. 2 is the attachment structure schematic diagram of pressure sensor.
Fig. 3 is the attachment structure schematic diagram of tachogenerator.
Fig. 4 is the attachment structure schematic diagram of strain measurement.
Fig. 5 is the attachment structure schematic diagram of turn-sensitive device.
Fig. 6 is material rotary impact response characteristic test system layout drawing.
In figure：
1. compressed air pressure source, 2. pressure regulators, 3. impulse senders, 4. lasing light emitters, 5. switching valves, 6. momentum notches
Device, 7. strain transducers, 8. test clubs（Input lever）, 9. probes, 10. load sample storehouses, 11. rotating speed speed regulators, 12. electric rotating machines,
13. pressure sensor, 14. laser velocimeter sensors, 15. boxcars, 16. interfaces, 17. digital dynamic strain indicators, 18. turns
Fast sensor, 19. data integration casees, 20. computers, 21. pressure valve, 22. pressure gauges, 23. connectors, 24. signal cables,
25. laser beam, 26. signal cables, 27. reshapers, 28. drill bits, 29. speed probe output cords, 30. load samples set storehouse, 31.
Sample, 12DC.12 volt dc sources, DIB. data integration casees, I. inputs, O. outputs.
Embodiment
The present invention is further described with reference to the accompanying drawings and examples.
The system is arranged on laboratory level implosion test platform, rotation-shock response characteristic for test material
Parameter.
It is as shown in figures 1 to 6 the structural representation of material rotary impact response characteristic test system of the present invention, the system bag
Include（i）Rotation with impact unit,（ii）Data acquisition unit and（iii）Data analysis unit,
The rotation is made up of with impact unit system platform, impulse generating unit, load sample storehouse and rotary unit；
The impulse generating unit is by pressure source, pressure regulator, impulse sender, pulse shaper, switching valve, momentum
Trapper and test club composition；
The load sample storehouse is carrying sample；
The rotary unit is made up of electric rotating machine, speed regulator and output shaft；
The data acquisition unit is by pressure sensor, strain transducer, laser velocimeter sensor, speed probe, number
Formed according to boxcar, dynamic strain indicator and data integration case；
The data analysis unit, the data of the conversion and digital integration are arrived through data-interface and cable transmission described in
Data analysis unit is analyzed, stored and exported, and the structure and physico mechanical characteristic of material are analyzed；
Wherein, the system platform is horizontal stiffness support, is directly installed on level ground, the impulse sender,
Momentum trapper and test club are fixedly mounted on the horizontal stiffness support；Pressure source is air compressor machine, and air compressor machine passes through pressure
Pipe network and pressure regulator UNICOM, are demarcated, pressure sensor is arranged in pressure regulator pipeline by the master gauge of adjuster
The front of pressure gauge in input I- output O loops, by coupling head and pipeline UNICOM, the pressure regulator passes through pipeline and institute
State impulse sender UNICOM, impulse sender, pulse shaper, switching valve, momentum line trap, test club, drill bit, load sample storehouse and
Speed regulator is located on same level axis, and the pulse shaper, switching valve, momentum line trap, test club are from left to right successively
Connection, strain transducer are arranged on the test club, and the one end in the load sample storehouse connects firmly with output shaft, and output shaft passes through rotating speed
Adjuster is connected firmly with electric rotating machine, and the laser velocimeter sensor being made up of the receiver of laser beam emitting head and laser sensor is set
Between impulse sender and switching valve, probe be arranged on the load sample storehouse on, speed probe be arranged on on load sample storehouse
Corresponding to probe on position, strain transducer is connected with pressure sensor by cable, interface and data conversion box data, data
Boxcar is connected with Digital Dynamic Strain Gauge data, and Digital Dynamic Strain Gauge is connected with data integration case data；Tachogenerator
Data integration case is accessed through cable with speed probe, data integration case will be transported to data analysis unit, institute after data integration
Stating data analysis unit includes remote terminal, other terminals, computer and printer.
The load sample storehouse is rigid cylindrical cylinder, and its base couples with the output shaft of speed regulator 11, according to sample in load sample storehouse
Specification be provided with load sample set storehouse, load sample set storehouse in installation sample, specimen finish and set storehouse internal diameter between mismatch error and together
Axle degree should meet the requirement about testing of materials, and the axial length in load sample storehouse is more than sample set storehouse and specimen length, the length exceeded
Degree should meet that sample impacts the security protection requirement splashed during fragmentation in the embodiment in figure 1, and pressure sensor is used for testing pressure
The pressure of compressed air that power source exports through pressure regulator, it is the transmitting pressure of transmitter.The present invention uses Britain Gems 2200/
2600 transducer series, the measurement range of each pressure sensor is 0.01-25.0 MPa.
Data collecting system is arranged on laboratory bench, will be rotated and is amplified, turns with the data of impact system collection
Change, integrated and transmission.
Data collecting system is made up of boxcar, digital dynamic strain indicator and data integral box.Wherein, boxcar includes
Amplifier and converter：（1）Amplifier, it belongs to typical Wheatstone bridge（Wheatstone Bridge）Preamplifier,
Strain signal to be amplified.（2）Converter, the analogue data that pressure sensor gathers is changed.The present invention uses day
This CSW-5A type converters, it is connected by CR-655 interface cables with digital deformeter.Digital Dynamic Strain Gauge, by CSW-
The pressure simulation signal of 5A boxcars input is transformed to data signal, and the present invention uses Nicolet Sigma 90（Digital
Oscilloscope workstation）Digital Dynamic Strain Gauge, data set is entered data into by RS-232C interface cables
Into case DIB（Date Integrated Box）.Data integration case will collect to the input information rotated with impact system test
Into being input to terminal device by CR-553B interface cables.
Strain transducer is used to measure the incident stress wave and reflection stress wave in input lever.The present invention is according to measurement purpose
Measured using drawing/compressive strain or shear strain.Tension and compression strain measurement is accessed using full-bridge mode, totally two pairs of foil gauges, wherein two
Individual is sensing chip, and another two is compensating plate, and such as R1, R4 use high value（1000Ω）Foil gauge, R2, R3 use precision standard
1000 Ω resistance.Shear strain measure is also accessed using full-bridge mode, and four foil gauges are sensing chip.The foil gauge pasted
Change in resistance should be less than 0.5W, and the insulaion resistance between foil gauge and depression bar should be greater than 100MW.The stickup of foil gauge, lead connection
Connect and strain testing operates according to a conventional method.
Strain transducer is coupled with pressure sensor by cable, interface with boxcar, and is input to digital dynamic strain
Instrument, and access data integration case；Tachogenerator and speed probe access data integration case through cable.After data integration, by
Integral box is transported to the data analysis terminal such as computer or oscillograph.
For low resistivity materials such as the scattered software such as weak soil, sandy soil, rubble and plastics, strain rate is very low, and impulsive load produces
Percussion very little, shock pulse signal at this moment is weak.In the embodiment in figure 1, viscoelasticity is used for relatively low signal
Bar and/or quartz piezoelectric sensor compensate.
In the embodiment of fig. 2, the scheme of installation of pressure sensor is given.
In the embodiment of fig. 2, pressure sensor 13 is arranged on the appropriate location in the pipeline of pressure regulator 2, general place
The front of pressure gauge 22 in input I- outputs O loops, when pressure fluid is input in transmitter pipeline, through pressure valve 21, pressure
Power table 22 and pressure sensor 13 are input to the pipeline of impulse sender 3, and pressure sensor 13 is connected by coupling head 23 with pipeline,
When pressure fluid is through pressure sensor 3, piezoresistive sheet that pressure is acted on sensor, make its deformation so that resistance, electric current
Or the electric signal such as voltage changes.Electric signal is transferred to data collecting system through data cable 24 by interface.
In the fig. 3 embodiment, tachogenerator is used for measuring the impact speed of transmitting bar.The present invention is surveyed using line laser
Fast sensor is tested the speed, and it installs as shown in Figure 3.The line laser 25 that lasing light emitter 4 is launched passes through impulse sender 3 and test club
（Input lever）Interval between 8, received by the receiver 14 of laser sensor, when impulse sender triggers, in transmitting tube 3
Trip rod（Bullet）Projected with certain speed along transmitting tube, line of cut laser beam 25, laser pickoff 14 produces photoimpact, letter
Number data collecting system is transferred to through cable 26, analysis system is transferred to by acquisition system again, the width set according to line laser
Bullet rate of cutting is calculated with the burst length.Laser velocimeter sensor levels are installed, and laser rays is vertical with transmitting rod axis.
In the fig. 3 embodiment, incidence wave reshaper 27, switching valve 5 and momentum line trap 6 are used for obtaining complete add
Carrier wave shape and the second load for avoiding incident bar.Reshaper chooses the preferable mechanical property known materials of plasticity, is glued with vacuum grease
It is attached to input lever to hit on the center at end, reshaper is made up of one or more combined reshapers, to filter loading
The high fdrequency component caused by direct collision in ripple, reduce the dispersion effect of ripple, and effectively increased by its plastic deformation
The rise time of incident stress pulse, ensure to deform the balance of uniform stress in sample, obtain constant strain rate loading.Switching valve
5 and momentum line trap 6 implementing pulse loading, avoid in trip rod impact process test club because hitting end reflected compression
Ripple is to second load caused by sample.When testing low resistivity materials, reshaper is used to ensure the precision of test.
In the fig. 4 embodiment, speed probe 18 is used for measuring the rotating speed of load sample storehouse 10.In the present invention using Germany
PEPPERL+FUCHS electromagnetic sensors measure rotating speed, and measurement range is 0-2500 r/min.
Speed probe 18 is arranged on and 9 corresponding position of probe on the load sample storehouse 10 of the output shaft of rotating speed speed regulator 11 connection
On.When probe 9 rotates together with load sample storehouse 10, probe 9 will be inswept in the front end of speed probe 18（Dotted line garden is 9 turns of probe
Track when dynamic）, i.e. speed probe 18 is located in the plane of the rotational circle contour institute envelope of probe 9.Now speed probe 18
Generation electromagnetic pulse, and data collecting system is transferred to by data cable 29.Leverage is inputted in the present invention by input lever 8 and is bored
First 28 composition.Speed probe 11 is driven by electric rotating machine 12, and electric rotating machine 12 can be by electricity, hydraulic pressure or the driving such as calm the anger, at this
Being driven in inventive embodiments by 380V alternating voltages, load sample storehouse 10 couples with the output shaft of speed probe 11, therefore, load sample storehouse 10
There is identical rotating speed with the output shaft of speed probe 11.
In the 5 embodiment of figure 5, load sample storehouse 10 is certain thickness rigid cylindrical cylinder, and its base exports with speed regulator 11
Axle couples, and can install load sample set storehouse 30 in load sample storehouse 10 according to size of sample, cover and sample 31 is installed in storehouse, the diameter of sample 31 and set
Mismatch error and axiality between the internal diameter of storehouse 30 should meet the requirement about testing of materials.According to test request, can have
Different set storehouse internal diameters and specimen size.The axial length in load sample storehouse 10 is more than sample set storehouse 30 and the length of sample 31, exceeds
Length should meet that sample impacts the security protection requirement splashed during fragmentation.
In the embodiment in fig 6, the arrangement form of the present invention is given.
Pressure source 1 is air compressor machine, is typically located at the sound insulation space farther out from test site, will be calmed the anger by pressure pipe network
Interior is introduced, and is measured with the UNICOM of pressure regulator 2, pressure of compressed air by pressure sensor 13, and the standard pressure for passing through adjuster 2
Power table is demarcated.Impulse sender 3, switching valve 5, momentum line trap 6, test club 8 and load sample storehouse, speed probe 11 are located at
On same level axis.Lasing light emitter 4, laser velocimeter sensor 14 are arranged between impulse sender 3 and switching valve 5.Tension and compression should
Change and shear strain can be arranged and measured simultaneously.Probe is arranged on the load sample storehouse, and speed probe is arranged on and load sample storehouse
On probe corresponding on position.
The present invention general principle be：Using leverage, rotary system, sensor technology and digital integrated technology is hit, build
A kind of material rotation-shock response characteristic test system is found, rotation-knockout process is simulated by hitting leverage and rotary system,
Trip rod striking experiment bar（Input lever）Afterwards, test club is produced certain speed and displacement, at the same produce in test club into
Stress wave is penetrated, after stress wave reaches experiment rod end surface, hits the sample driven by rotary system, and occur instead hitting end face
Penetrate stress wave.Drawing/pressure and shear strain are gathered from test club by data collecting system, signal is with voltage or electronic pulse signal
Form, data collecting system is directly output to according to selected sample frequency, inputed to after data conversion and digital integration
Computerized analysis system and other-end, carry out storage, display, analysis, printing and the network transmission of data.Analysis system according to
Elastic rod enters/reflection stress wave principle, calculates the parameters such as the dynamic compression strength for obtaining strain energy, moment of torsion and measured material.It is logical
Cross tachogenerator and pressure sensor obtains and hits the transmitting pressure of leverage, hits speed, so as to which analysis of material is in rotation-punching
Hit or one impulse under the conditions of structure and mechanical response characteristic.
Wherein, the pressure measxurement of impulse ejection system is realized by pressure sensor, and original induced signal is voltage or electricity
Stream；The speed of rotation in the load sample storehouse that rotary system is driven is measured by electromagnetism rotating sensor, and original induced signal is electromagnetism arteries and veins
Signal is rushed, revolution is recorded by pulse number；The shock speed of test club realizes that its is original defeated by laser velocimeter sensor
It is the time that photoimpact occurs to go out signal, and impact speed is obtained by the line laser length of default.Ess-strain is by straining
Sensor, quartz crystal piezoelectric transducer are realized.
Claims (6)
1. a kind of material rotation-shock response characteristic test system, the system include（i）Rotation with impact unit,（ii）Data
Collecting unit and（iii）Data analysis unit, it is characterised in that；
The rotation is made up of with impact unit system platform, impulse generating unit, load sample storehouse and rotary unit；
The impulse generating unit is by pressure source, pressure regulator, impulse sender, pulse shaper, switching valve, momentum trap
Device and test club composition；
The load sample storehouse is carrying sample；
The rotary unit is made up of electric rotating machine, speed regulator and output shaft；
The data acquisition unit is turned by pressure sensor, strain transducer, laser velocimeter sensor, speed probe, data
Change box, digital dynamic strain indicator and data integration case composition；
The data analysis unit, will be changed and the data of digital integration are through data-interface and cable transmission to the data analysis
Unit is analyzed, stored and exported, and the structure and physico mechanical characteristic of material are analyzed；
Wherein, the system platform is horizontal stiffness support, is directly installed on level ground, the impulse sender, momentum
Trapper and test club are fixedly mounted on the horizontal stiffness support；Pressure source is air compressor machine, and air compressor machine passes through pressure pipe network
Connect with pressure regulator, demarcated by the master gauge of pressure regulator, pressure sensor is arranged on pressure regulation
The front of pressure gauge in O loops, by connector and pipeline connection, the pressure regulator are exported in device pipeline positioned at input I-
Connected by pipeline with the impulse sender, impulse sender, pulse shaper, switching valve, momentum line trap, test club,
Drill bit, load sample storehouse and speed regulator are located on same level axis, the pulse shaper, switching valve, momentum line trap, reality
Test bar to be from left to right sequentially connected, strain transducer is arranged on the test club, and the one end in the load sample storehouse is consolidated with output shaft
Even, output shaft is connected by speed regulator and electric rotating machine, is made up of the receiver of laser beam emitting head and laser sensor
Laser velocimeter sensor is arranged between impulse sender and switching valve, and probe is arranged on the load sample storehouse, speed probe
It is arranged on position corresponding with the probe on load sample storehouse, strain transducer passes through cable, interface and data with pressure sensor
Boxcar data are connected, and data conversion box is connected with digital dynamic strain indicator data, digital dynamic strain indicator and data set
Connected into case data；Laser velocimeter sensor and speed probe access data integration case through cable, and data integration case is by data
Data analysis unit is transported to after integrated, the data analysis unit includes computer and printer；It is single with impact using rotation
Member, sensor technology and digital integrated technology, establish a kind of material rotation-shock response characteristic test system, by rotation with
Impact unit simulates rotation-knockout process, after striking experiment bar, test club is produced certain speed and displacement, while in reality
Test in bar and produce incident stress wave, after stress wave reaches experiment rod end surface, hit the sample driven by rotary unit, and hitting
Hit end face and reflection stress wave occur, drawing/pressure and shear strain are gathered from test club by data acquisition unit, signal with voltage or
The form of electronic pulse signal, data acquisition unit is directly output to according to selected sample frequency, through data conversion and numeral
Data analysis unit is inputed to after integrated, carries out storage, display, analysis, printing and the network transmission of data, data analysis unit
According to reflection stress wave principle, the dynamic compression strength parameter for obtaining strain energy, moment of torsion and measured material is calculated, passes through Laser Measuring
Fast sensor and pressure sensor obtain the transmitting pressure of system, hit speed, so as to which analysis of material is in rotation-impact or one-shot
Structure and mechanical response characteristic under the conditions of hitting；
Wherein, the pressure measxurement of impulse generating unit is realized by pressure sensor, and original induced signal is voltage or electric current；Rotation
The speed of rotation for turning the load sample storehouse that unit is driven is measured by electromagnetism rotating sensor, and original induced signal is believed for electromagnetic pulse
Number, the shock speed of test club is realized by laser velocimeter sensor, its primary output signal be photoimpact occur when
Between, impact speed is obtained by the line laser length of default, ess-strain is by strain transducer, quartz crystal piezoelectric transducer
To realize.
2. system according to claim 1, it is characterised in that the load sample storehouse is rigid cylindrical cylinder, and its base is with turning
Fast adjuster output shaft connects, and size of sample is provided with load sample set storehouse in load sample storehouse, and load sample set installs sample, sample in storehouse
Mismatch error and axiality between diameter and set storehouse internal diameter should meet the requirement about testing of materials, the axial direction length in load sample storehouse
Degree is more than sample set storehouse and specimen length, and the length exceeded should meet that sample impacts the security protection requirement splashed during fragmentation.
3. system according to claim 1, it is characterised in that the operating voltage of the electric rotating machine is 380V.
4. system according to claim 1, it is characterised in that the operating voltage of the digital dynamic strain indicator is
220V。
5. system according to claim 1, it is characterised in that the operating voltage of the laser velocimeter sensor is 220V.
6. system according to claim 1, it is characterised in that the operating voltage of the data integration box is DC12V.
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| CN106771330B (en) * | 2017-01-16 | 2018-04-13 | 李嘉雯 | INTELLIGENT TACHOMETER for Hopkinson pressure bar experiment |
| CN108375501B (en) * | 2018-01-25 | 2021-04-16 | 南京理工大学 | Data processing method based on separated Hopkinson pressure bar experiment technology |
| CN110146394A (en) * | 2018-05-23 | 2019-08-20 | 谭乃根 | Material property impacts acoustics response test simulation system |
| CN110702352B (en) * | 2019-11-26 | 2021-10-26 | 广州大学 | Device for testing shock resistance of beam column member |
| CN111077030A (en) * | 2019-12-13 | 2020-04-28 | 河海大学 | Device and method for testing dynamic mechanical properties of concrete under high strain rate |
| CN113899634B (en) * | 2021-08-27 | 2024-05-24 | 北京工业大学 | Device and method for evaluating rock breaking efficiency of drill bit teeth under impact load effect |
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| CN2080174U (en) * | 1990-09-28 | 1991-07-03 | 北京科技大学 | Three shaft high speed shearing impact testing device |
| CN2916616Y (en) * | 2006-04-30 | 2007-06-27 | 中国人民解放军总参谋部工程兵科研三所 | Large diameter separate type Hopkinson pressure lever |
| CN103983754A (en) * | 2014-05-23 | 2014-08-13 | 天津大学 | Rock drilling simulation test device and method for determining pressure and torque of test pole |
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