CN103499489A - Cross-span multi-view in-situ dynamic mechanics capture testing platform - Google Patents
Cross-span multi-view in-situ dynamic mechanics capture testing platform Download PDFInfo
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Abstract
A cross-span multi-view in-situ dynamic mechanics capture testing platform comprises a control system, a vibration isolation test table and a mechanics tester, wherein the control system comprises a computer. Positioning screw holes are distributed on the vibration isolation test table in an array manner. The mechanics tester is connected with the control system with the computer through a data line. The cross-span multi-view in-situ dynamic mechanics capture testing platform is characterized in that a plurality of dynamic imaging devices are fixed around the precise mechanics tester; each dynamic imaging device is provided with an auxiliary light source to form an imaging system, and is connected with the control system with the computer through a data line. The testing platform is flexible to assemble and multifunctional, and provides a scientific and effective measure and method for research and detection of mechanics of subjects such as machinery and materials. Detection results play great significance in multi-view dynamic monitoring and disclosure of multi-span mechanics and breaking mechanism of materials or test pieces and can be widely applied to different engineering fields of aerospace, automobile industry, biomedicine, micro electro mechanical system and the like.
Description
Technical field
The present invention relates to mechanical property test and the detecting instrument of material, be specifically related to a kind of across yardstick, various visual angles in-situ mechanical multidate information seizure test platform.
Background technology
The mechanical property of material refers to that material is under varying environment (temperature, medium, humidity), the mechanical characteristics shown while bearing various plus loads (stretching, compression, bending, torsion, impact, alterante stress etc.).It is to weigh the Main Basis that quality of materials is good and bad, design various engineering structures reasonable material.Usually, the mechanical property of material is mainly measured by various testing machines such as tension and compression, torsion, impression, bendings.Traditionally, no matter be dynamic and static load, or the Mechanics Performance Testing under environmental baseline, fluctuating load, its test result is all usingd and is implemented variable quantity after load as the test foundation, and the micro-change of material in can not Real-Time Monitoring load implementing, damage are until the dynamic process destroyed.The special development along with Aeronautics and Astronautics technology and material science and military science, the material parameter that classical macroscopic material mechanical property test instrument and equipment is tested and performance oneself through can not the Complete Characterization material in Performance Characteristics that more small scale and maximum conditions are on active service, need to introduce test more directly perceived, accurate, observation and analysis means, with this mechanical behavior to material and failure mechanism, effectively analyze and further investigate.
For explore and disclose solid-state material drawing-press-curved-turn round etc. under load grand-microcosmic across the dynamic deformation behavior of yardstick, both at home and abroad minority mechanism just be devoted to development in conjunction with electron microscopic learn a skill, the microcosmic imaging means such as Laser scanning confocal microscopy technology, X-ray diffraction technology, for approach under service condition measure solid-state material dynamically, the in-situ testing technique of Micro Mechanical Properties.This measuring technology can not only be measured the various mechanics parameters of material, and can be to material the microdeformation in experimentation and damage process is carried out in real time, online observation, the iconology qualitative analysis is combined with the data quantitative analysis, disclose the process of material deformation damage under extraneous load with the visual field and the test angle of upgrading, find more novel phenomenon and rule.
Yet, current research work only can be single from certain angle the mechanical test of test specimen is observed, also do not consider test specimen is carried out to the in-situ observation across yardstick, various visual angles, special shortage is a set of can be simultaneously from a plurality of visual angles, collection routine, high definition, the at a high speed dynamic integrated test platform of capture apparatus, and the solution Related Technical Issues, this can miss a large amount of useful testing sites undoubtedly, the multianalysis of impact to the dynamic experiments data.Therefore, the design invention is a kind of to be caught across yardstick, multi-vision angle video image, the high accuracy in-situ mechanical test, the test platform system that collection routine, high definition, the monitoring of high speed dynamic process and each function-stable are implemented is very necessary, the process that this invention not only can the accelerated material in-situ mechanical deeply discloses, also will fill up the blank of this aspect testing tool development.
Summary of the invention
The object of the present invention is to provide a kind of across yardstick, various visual angles in-situ mechanical motion capture test platform, can be across yardstick, from various visual angles, the multi-frequency dynamic image catches, and can effectively avoid test vibration to cause the in-situ mechanical test platform of phase mutual interference between device.By a plurality of image devices of dynamic imaging system, can realize various visual angles visual field on-line monitoring simultaneously; By free adjustment dynamic imaging system, can realize the real-time shooting of different enlargement ratios and different motion speed dynamic image; Change mechanical testing instrument by freely selecting, can realize comprising the in-situ test of the multiple mechanical properties such as stretching/compressing, torsion, impression, bending and various fatigues; Simultaneously, each device is independent installation the on the vibration isolation experiment table respectively, and available buffer also reduces the impact shock caused because of test piece deformation, fracture etc., thereby has improved picture catching quality and data testing accuracy.Each device coordinating and unifying in test platform, solved in existing mechanical test and only can obtain test data and result, can not omnidistance problem of dynamically monitoring from various visual angles test process.
Above-mentioned purpose of the present invention is achieved through the following technical solutions, and accompanying drawings is as follows:
A kind of across yardstick, various visual angles in-situ mechanical motion capture test platform, mainly by control system 1, vibration isolation experiment table 7, the accurate mechanics tester 2 and the dynamic imaging system 3 that are fixedly mounted on vibration isolation experiment table 7, formed,
Described dynamic imaging system 3 is comprised of a plurality of image devices and secondary light source 4, each image device and secondary light source 4 are fixedly mounted on vibration isolation experiment table 7 by dynamic imaging system mounting bracket 6 and flexible support 5 respectively, and become different angles, height straggly be distributed in accurate mechanics tester 2 around, all image devices all have take the dynamic image seizure effect that test specimen 23 is target, and described dynamic imaging system 3 is connected with the control system that computing machine forms by data line.
Described dynamic imaging system 3 needs by test, choosing fills conventional picture pick-up device, high-definition monitoring device or high-speed camera device, the technical parameter of described conventional picture pick-up device is: resolution 640 * 480-1920 * 1080 pixels, and 1 times-80 times of zooms, take frame per second 30 hardwoods-50 hardwood/second;
The technical parameter of described high-definition monitoring device is: resolution 1280 * 720-1920 * 1080 pixels, and 1 times-30 times of zooms, take frame per second 30 hardwoods-50 hardwood/second;
The technical parameter of described high-speed camera device is: resolution 384 * 288-1280 * 960 pixels, filming frequency 30 hardwoods-10000 hardwood/second, 1 times-50 times of zooms.
Described accurate mechanics tester 2 is vertical structure, mainly by motor 29, turbine and worm mechanism, leading screw 28, feed rod 22, fixture and pull pressure sensor 21 form, described motor 29 is installed on base 13 by flange holder, upright two leading screws that are arranged symmetrically with 28 in motor 29 both sides, leading screw 28 is fixed on upper lower clamp mount pad 26 by upper and lower feed screw nut seat 24, and be separately fixed on footstock 25 and base 13 by upper and lower lead screw shaft bearing 19, two upright and feed rods 22 that be arranged symmetrically with are fixed on upper lower clamp mount pad 26 by upper and lower 2 linear bearings 20, upper lower clamp 27 is separately fixed on lower clamp mount pad 26, pull pressure sensor 21 is connected on lower clamp mount pad 26, two rhizoid thick sticks 28 drive rotation that upper lower clamp 27 is oppositely relatively moved along two feed rods 22 by motor 29 by the double lead-screw turbine and worm is secondary, test specimen 23 is stretched or compression.
Described dynamic imaging system mounting bracket 6 by connected vertically move up and down frame 11 and move left and right frame 12 form, the described frame 11 that moves up and down is fixed on bracket base 10, its position is adjustable, described move up and down frame 11 and move left and right frame 12 be respectively socket, and carry out position and angular adjustment by adjusting bolt 9 respectively, described dynamic imaging system 3 is arranged on and moves left and right on frame 12.
Described vibration isolation experiment table 7 natural frequencys are not more than 6Hz, amplitude≤5um, surface smoothness≤1.6um, flatness≤0.1mm/m
2.
It is definite that described secondary light source 4 is looked on-the-spot light situation, and it exposes to the surperficial reference color temperature that can reach of test specimen need reach 5000-6000K.
Described double lead-screw 28 is installed on instrument by lead screw shaft bearing 19 by bearing respectively, is vertical parallel distribution; Double lead-screw 28 by four feed screw nuts up and down the fixture mount pad power and motion are provided; A low speed worm gear 16 is installed in each leading screw lower end, whole instrument is driven by single motor 29, power and the output shaft output of motion by drive motor 29, after slowing down by the first-stage worm gear worm gear pair, power is separated both sides by the high speed worm-wheel shaft to the left and right with motion, a low speed worm screw 18 is respectively installed at two ends, high speed worm-wheel shaft left and right, and low speed worm screw 18 forms the second-stage worm gear worm gear pair with low speed worm gear 16, respectively to double lead-screw 28 transferring power and motion.
Beneficial effect of the present invention is: for the different demands of high precision mechanics test, when realization is obtained subsized specimen conventional mechanical property data, can also be under macroscopic view or micro-scale, from a plurality of visual angles, the Mechanics Performance Testing process to test specimen is carried out precise monitoring simultaneously, obtain in real time high-quality dynamic video signal, solved in existing mechanical test and only can obtain test data and result, can not whole process dynamically monitor from various visual angles the problem of test process, and can be by taking the reasonable selection of device and mechanical testing instrument in test platform, support the Reasonable Orientation with fastening structure, avoid because of the impact of test vibration on testing result, thereby improved the accuracy of data, comprehensive, reliability.This test platform aims at the mechanics study forward position, monitoring comprehensively, diverse in function, strong innovation, for the mechanical property research of the subjects such as machinery, material and detection provide science, effective measure, testing result is significant at mechanical behavior and failure mechanism under multiple dimensioned for disclosing material or test specimen.Simultaneously, this test platform also can be widely used in Aero-Space, auto industry, biomedicine, numerous engineering fields such as micro electronmechanical, has higher scientific research and is worth and good Commercial Prospect.
The accompanying drawing explanation
Fig. 1 is overall appearance structural representation of the present invention;
The structural representation that Fig. 2 is dynamic imaging system of the present invention;
The structural representation that Fig. 3 is vertical in-situ mechanical testing tool of the present invention.
In figure: 1, control system; 2, accurate mechanical testing instrument; 3, dynamic imaging system; 4, secondary light source; 5, flexible support; 6, dynamic imaging system mounting bracket; 7, vibration isolation experiment table; 8, translucent cover; 9, adjusting bolt; 10, bracket base; 11, move up and down frame; 12, move left and right frame; 13, base; 14, high speed worm screw; 15, high speed worm gear; 16, low speed worm gear; 17, fixed bolt hole; 18, low speed worm screw; 19, lead screw shaft bearing; 20, linear bearing; 21, pull pressure sensor; 22, feed rod; 23, test specimen; 24, feed screw nut seat; 25, footstock; 26, fixture mount pad; 27, upper and lower fixture; 28, leading screw; 29, motor.
Embodiment
Further illustrate particular content of the present invention and embodiment thereof below in conjunction with the accompanying drawing illustrated embodiment.
Of the present invention a kind of across yardstick, various visual angles in-situ mechanical motion capture test platform, can be across yardstick, from various visual angles, the multi-frequency dynamic image catches, and can effectively avoid test vibration to cause the in-situ mechanical test platform of phase mutual interference between device.
One, the positioning screw hole that has dot matrix to distribute on vibration isolation experiment table 7 table tops, accurate mechanics tester 2 is installed on the suitable positioning screw hole place of vibration isolation experiment table 7 table tops by set bolt, the mechanical test instrument is connected with the control system that computing machine forms by data line, a plurality of dynamic imaging devices be fixed on accurate mechanics tester around, each imaging device is equipped with a secondary light source 4 and forms imaging system, imaging device is connected with the control system that computing machine forms by data line, respectively there is a strip hole that can make the base fixed position change the frame bottom both sides, bracket base is fixed on vibration isolation experiment table positioning screw hole place by fastening bolt, the pillar that moves up and down frame 11 inserts perpendicular in cylinder type hollow sleeve pipe fixing on the bracket base center, the top of sleeve pipe one side has one for adjusting, to move up and down the adjusting bolt 9 of frame high and low position, Image-forming instrument is fixed on an end that moves left and right frame 12, the pillar that moves left and right frame is arranged in perpendicular to moving up and down frame and passing the cylinder type hollow trepanning that moves up and down the frame top, the middle part of trepanning one side has one for adjusting, to move left and right the adjusting bolt of position, frame left and right, frame bottom one end is fixed with for supporting secondary light source 4 and regulating the flexible support 5 of light source position, cantilever tip is equipped with flexible light source.
Two, accurate mechanics tester is vertical structure, four jiaos of base 13 have respectively fixed bolt hole 17, motor 29 is installed on base by flange holder, both sides respectively have a leading screw perpendicular to the motor rectilinear direction 28 bottoms to be fixedly connected with low speed turbine 16, and respectively with the high speed worm screw 14 of both sides, high speed turbine 15, low speed worm screw 18 forms double lead-screw turbine and worm pair, leading screw is through the feed screw nut seat 24 of lead screw shaft bearing 19 and bottom traveling table, both sides respectively have a feed rod that is parallel to the motor rectilinear direction pass the linear bearing 20 of bottom traveling table and be fixed in the circular hole of lead screw shaft bearing both sides, traveling table top center place, bottom is fixed with pull pressure sensor 21, the sensor top is fixed with lower clamp 27, fixture mount pad 26 bottoms of top movable platform center are fixed on upper fixture 27 tops, two feed screw nut seats 24 on the top movable platform and two linear bearings 20 are respectively through two rhizoid thick sticks and two feed rods, two lead screw shaft bearings 19 on footstock 25 are socketed in two rhizoid thick stick tops, two circular holes on footstock are fixed two feed rod tops.Other are with embodiment mono-.
Consult Fig. 1 to Fig. 3, of the present invention across yardstick, various visual angles in-situ mechanical motion capture test platform, comprise the parts such as control system 1, accurate mechanics tester 2, dynamic imaging system 3, secondary light source 4, flexible support 5, dynamic imaging system mounting bracket 6, vibration isolation experiment table 7, translucent cover 8 and accessory structure.
Described control system 1 is connected with dynamic imaging system 3 with accurate mechanics tester 2 through data line, by software, realizes the control to above-mentioned two kinds of devices, and Real-time Obtaining two device work form thus signal or data.
Described accurate mechanics tester 2 can be vertical structure, base 13, high speed worm screw 14, high speed worm gear 15, low speed worm gear 16, fixed bolt hole 17, low speed worm screw 18, lead screw shaft bearing 19, linear bearing 20, pull pressure sensor 21, feed rod 22, test specimen 23, feed screw nut seat 24, footstock 25, fixture mount pad 26, upper and lower fixture 27, leading screw 28, motor 29 etc., partly consists of.Wherein on base 13, fixed bolt hole 17 is arranged, motor 29 is installed on base 13 by flange holder, leading screw 28 is two, by bearing and lead screw shaft bearing 19, be fixed on base 13, feed rod 22 is two, can base for supporting 13 and footstock 25, and the effect that can serve as again line slideway, pull pressure sensor 21 connects lower Mobile base and lower clamp, and upper fixture is connected with upper fixture mount pad 26.By the effect of double lead-screw pair of nut, can make upper and lower clamp body 27 oppositely relatively move along two polished rods 22, to realize stretching or the compression to test specimen 23.Vertical in-situ mechanical tester can be from angles different around instrument the in-situ observation to test specimen 23 mechanical tests, to guarantee to obtain useful testing site.
Described dynamic imaging system 3 can be according to the test needs, and choosing fills conventional picture pick-up device, high-definition monitoring device and high-speed camera device.The technical parameter of conventional picture pick-up device is: resolution 640 * 480-1920 * 1080 pixels; 1 times-80 times of zooms; Take frame per second 30 hardwoods-50 hardwood/second.The technical parameter of high-definition monitoring device is: resolution 1280 * 720-1920 * 1080 pixels; 1 times-30 times of zooms; Take frame per second 30 hardwoods-50 hardwood/second.The technical parameter of high-speed camera device is: resolution 384 * 288-1280 * 960 pixels; Filming frequency 30 hardwoods-10000 hardwood/second; 1 times-50 times of zooms.Realization is dynamic to the various visual angles of the test specimen 23 on accurate mechanics tester 2, shooting in real time.
Described secondary light source 4 can be selected to install according to on-the-spot light situation, and secondary light source exposes to the surperficial reference color temperature that can reach of test specimen need reach 5000-6000K.Secondary light source 4 is fixed on bracket base 10 by clamp nut by flexible support 5, by the flexural deformation of flexible support 5, can regulate arbitrarily the irradiation position of secondary light source 4, for dynamic imaging system 3 provides best light source.
Described dynamic imaging system mounting bracket 6 by adjusting bolt 9, bracket base 10, move up and down frame 11, move left and right frame 12 etc. and partly form.Wherein base 10 is fixed on the suitable positioning screw hole place of vibration isolation experiment table 7 by fastening bolt, position can before and after step-less adjustment; Move up and down frame 11 and mutually be socketed with bracket base 10, fastening by adjusting bolt 9, position is step-less adjustment up and down, also can carry out the angle step-less adjustment along moving up and down frame 11 axis; Move left and right frame 12 and move up and down frame 11 and mutually be socketed, fastening by adjusting bolt 9, position can the left and right step-less adjustment, also can carry out the angle step-less adjustment along moving left and right frame 12 axis; Dynamic imaging system imaging device with move left and right frame and be connected by bolt.By above structure, can realize five degree of freedom position adjustments of dynamic imaging system imaging device.
Described vibration isolation experiment table 7 natural frequencys are not more than 6Hz, and amplitude is not more than 5um, and surface smoothness is not more than 1.6um, and flatness is not more than 0.1mm/m
2, stabilized structure is reliable, plays support, loads each test component vibration isolation effect.
Described translucent cover 8 is installed on vibration isolation experiment table 7 by hinge, can effectively alleviate the interference of extraneous factor to test experiments, and the handle by translucent cover 8 one sides can start it side that is put into vibration isolation experiment table 7.
The present invention is in concrete test process, at first, to choose dissimilar accurate mechanics tester 2 according to the needs of test experiments, open translucent cover 8, with special-purpose set bolt, selected in-situ mechanical tester is arranged on to the appropriate location of vibration isolation experiment table 7, secondly, requirement by selected accurate mechanics tester 2 becomes standard-sized test exemplar by the materials processing that will test, and utilizes small-sized buffing machine to carry out to test specimen the better surface smoothness that polishing obtains can be used for the monitoring of high resolving power micro-imaging, then, the experiment exemplar processed is installed on the fixture of accurate mechanics tester 2, location clamps to be measured, again, regulating system, difference opening control 1 and dynamic imaging system 3, by adjust each image device that each dynamic imaging system mounting bracket 6 makes dynamic imaging system 3 with suitable angle and distance the appropriate location over against test specimen, by regulating flexible support 5, make secondary light source 4 in suitable position, open secondary light source 4, again regulate position and the focal length of camera lens and the position of aperture size and secondary light source 4 of each image device of dynamic imaging system 3, make test specimen can present the image of complete display, close secondary light source 4, close translucent cover 8, setup test, finally, start test, again open secondary light source 4, open distortion or the load control mode of specified load test, mode with pulse output drives the beginning test process, by testing algorithm program setting test condition and parameter, under the effect of time sequential pulse control signal, the precision DC servomotor is exported accurate angular displacement, the final realization loads the Ultra-Low Speed quasistatic of standard specimen, sophisticated sensor in test process on accurate mechanics tester 2 is detected load F, and makes necessary correcting process by algorithm routine, simultaneously the deflection h of test specimen is synchronously picked up by the precise displacement sensor on accurate mechanics tester 2, and two paths of signals is by analog to digital conversion and carry out sending into computing machine after necessary signal condition.In the whole process of test, the deformation damage situation of tested standard specimen material under load is carried out various visual angles dynamic monitoring simultaneously by dynamic imaging system 3, and this is recorded a video and preserve, but by the also important mechanics parameters such as stress-strain curves, elastic modulus, yield strength, shear modulus and breakdown strength of Real-time Obtaining exosyndrome material mechanical property of host computer debugging software.Analysis by the microdeformation to material structure and destruction thereof, damage status video, the data that coordinate the exosyndrome material mechanical property, just can be to material the deformation damage mechanism under load and mechanics military service behavior furtherd investigate, thereby the performance of more thorough Knowing material.
Claims (7)
1. one kind across yardstick, various visual angles in-situ mechanical motion capture test platform, mainly by control system (1), vibration isolation experiment table (7), the accurate mechanics tester (2) and the dynamic imaging system (3) that are fixedly mounted on vibration isolation experiment table (7), formed, it is characterized in that:
Described dynamic imaging system (3) is comprised of a plurality of image devices and secondary light source (4), each image device and secondary light source (4) are fixedly mounted on vibration isolation experiment table (7) by dynamic imaging system mounting bracket (6) and flexible support (5) respectively, and become different angles, height straggly be distributed in accurate mechanics tester (2) around, all image devices all have take the dynamic image seizure effect that test specimen (23) is target, and described dynamic imaging system (3) is connected with the control system that computing machine forms by data line.
2. according to claim 1 across yardstick, various visual angles in-situ mechanical motion capture test platform, it is characterized in that:
Described dynamic imaging system (3) needs by test, choosing fills conventional picture pick-up device, high-definition monitoring device or high-speed camera device, the technical parameter of described conventional picture pick-up device is: resolution 640 * 480-1920 * 1080 pixels, and 1 times-80 times of zooms, take frame per second 30 hardwoods-50 hardwood/second;
The technical parameter of described high-definition monitoring device is: resolution 1280 * 720-1920 * 1080 pixels, and 1 times-30 times of zooms, take frame per second 30 hardwoods-50 hardwood/second;
The technical parameter of described high-speed camera device is: resolution 384 * 288-1280 * 960 pixels, filming frequency 30 hardwoods-10000 hardwood/second, 1 times-50 times of zooms.
3. according to claim 1 and 2 across yardstick, various visual angles in-situ mechanical motion capture test platform, it is characterized in that:
Described accurate mechanics tester (2) is vertical structure, mainly by motor (29), turbine and worm mechanism, leading screw (28), feed rod (22), fixture and pull pressure sensor (21) form, described motor (29) is installed on base (13) by flange holder, upright two leading screws that are arranged symmetrically with in motor (29) both sides (28), leading screw (28) is fixed on upper lower clamp mount pad (26) by upper and lower feed screw nut seat (24), and be separately fixed on footstock (25) and base (13) by upper and lower lead screw shaft bearing (19), two upright and feed rods (22) that be arranged symmetrically with are fixed on upper lower clamp mount pad (26) by upper and lower 2 linear bearings (20), upper lower clamp (27) is separately fixed on lower clamp mount pad (26), pull pressure sensor (21) is connected on lower clamp mount pad (26), two rhizoid thick sticks (28) drive rotation that upper lower clamp (27) is oppositely relatively moved along two feed rods (22) by motor (29) by the double lead-screw turbine and worm is secondary, test specimen (23) is stretched or compression.
4. according to claim 3 across yardstick, various visual angles in-situ mechanical motion capture test platform, it is characterized in that:
Described dynamic imaging system mounting bracket (6) by connected vertically move up and down frame (11) and move left and right frame (12) form, the described frame (11) that moves up and down is fixed on bracket base (10), its position is adjustable, described move up and down frame (11) and move left and right frame (12) be respectively socket, and carry out position and angular adjustment by adjusting bolt (9) respectively, described dynamic imaging system (3) is arranged on and moves left and right on frame (12).
5. according to claim 3 across yardstick, various visual angles in-situ mechanical motion capture test platform, it is characterized in that:
Described vibration isolation experiment table (7) natural frequency is not more than 6Hz, amplitude≤5um, surface smoothness≤1.6um, flatness≤0.1mm/m2.
6. according to claim 3 across yardstick, various visual angles in-situ mechanical motion capture test platform, it is characterized in that:
It is definite that described secondary light source (4) is looked on-the-spot light situation, and it exposes to the surperficial reference color temperature that can reach of test specimen need reach 5000-6000K.
7. according to claim 3 across yardstick, various visual angles in-situ mechanical motion capture test platform, it is characterized in that:
Described double lead-screw (28) is installed on instrument by lead screw shaft bearing (19) by bearing respectively, is vertical parallel distribution; Double lead-screw (28) by four feed screw nuts up and down the fixture mount pad power and motion are provided; A low speed worm gear (16) is installed in each leading screw lower end, whole instrument is driven by single motor (29), power and the output shaft output of motion by drive motor (29), after slowing down by the first-stage worm gear worm gear pair, power is separated both sides by the high speed worm-wheel shaft to the left and right with motion, a low speed worm screw (18) is respectively installed at two ends, high speed worm-wheel shaft left and right, and low speed worm screw (18) forms the second-stage worm gear worm gear pair with low speed worm gear (16), respectively to double lead-screw (28) transferring power and motion.
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| CN109115597A (en) * | 2018-10-23 | 2019-01-01 | 大连理工大学 | A kind of middle low speed strain rate MATERIALS ' DYNAMIC compression and stretching mechanical property testing system and method |
| CN109115597B (en) * | 2018-10-23 | 2023-12-29 | 大连理工大学 | System and method for testing dynamic compression and stretching mechanical properties of medium-low-speed strain rate material |
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