CN103728183A - Single fiber fragmentation test device based on machine vision and control method of single fiber fragmentation test device - Google Patents
Single fiber fragmentation test device based on machine vision and control method of single fiber fragmentation test device Download PDFInfo
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Abstract
The invention relates to the technical field of test devices, in particular to a single fiber fragmentation test device based on machine vision and a control method of the single fiber fragmentation test device. The single fiber fragmentation test device based on machine vision comprises a base, a programmable controller arranged on the base, a servo controller electrically connected with the programmable controller and a servo motor electrically connected with the servo controller, wherein the servo motor is connected with a transmission mechanism and used for driving the transmission mechanism to longitudinally move; and an image acquisition device is mounted on the transmission mechanism and used for observing a fiber breakage position of a test piece. The single fiber fragmentation test device is matched with a general material testing machine for use; stretching and loading of a sample are completed by the material testing machine in the testing process, so that the loading accuracy is guaranteed, and the instrument cost is reduced; and the main functions of the single fiber fragmentation test device are microscopic observation and fracture analysis, and the single fiber fragmentation test device is not limited to a fiber fragmentation test and can be developed and applied to other fields where samples are required to be observed through appropriate improvement.
Description
Technical field
The present invention relates to the technical field of test unit, more specifically, relate to a kind of fragmentation test device and control method thereof based on machine vision.
Background technology
The application of fibre reinforced composites is extremely extensive, and the research of composite materials property and evaluation are seemed to very important.The mechanical property of fibre reinforced composites depends primarily on three key elements: interface shear strength between fortifying fibre, matrix, fiber and matrix (IFSS), wherein the intensity of fiber or matrix easily records, and the mensuration of IFSS is affected by the factors such as fiber distribution, fiber orientation and bending, be difficult to adopt true composite sample directly to record, can only measure by indirect test.
Conventional IFSS method of testing has four kinds both at home and abroad: fragmentation test, indentation test, pull, microballon test.Although these four kinds of test methods all exist certain deficiency, workable in actual applications, its test findings has reflected IFSS size to a great extent, so industry still adopts these four kinds of methods to measure IFSS.Wherein, fragmentation test method because of its test specimen make relatively simple, be subject to that external action is less, can occur that the typical failure modes such as fibre breakage, interface unsticking, matrix yielding, matrix cracking are widely adopted in test.While carrying out fragmentation test, with matrix material, make tensile test specimen, position, test specimen axis is embedded with a fortifying fibre in advance, then test specimen is stretched, and passes through observation by light microscope fiber fracture process piecemeal simultaneously.During matrix tension, produce deformation, acting on fiber surface produces along the equally distributed shear stress of fibre length direction, due to the accumulation of fiber surface shear stress along fibre length direction, fiber cross section in-draw stress (normal stress) is along two ends to middle linear increasing.When fiber normal stress value reaches the pulling strengrth limit of fiber, fibre breakage.After fibre breakage, the normal stress at breakpoint place is zero, fibre stress redistribution.Increase along with tensile load, near breaking at fiber centre position, in succession occur, until the contraction in length of fiber is not enough to produce while being greater than the normal stress of the fibre strength limit to the accumulation of shear stress between two breakpoints, between fiber and matrix, produce slippage, fibre breakage no longer occurs, and test stops.
Domestic and international existing fragmentation test device can be divided into two classes at present: a class is manual loading, manual observation, and its advantage is that test unit cost is low; Shortcoming is that process of the test is subject to manual impact, and loading velocity is difficult to control, and process of the test is discontinuous, and test repeatability is poor.Another kind of is to be all robotization from being loaded into measurement, and advantage is that loading velocity is controlled, and process of the test is continuous, and test repeatability is better; Shortcoming is that package unit contains loading and two parts of observation, and cost is higher.Consider that Material Testing Machine is to carry out the most general equipment of Material mechanics test, general materials mechanics experimental chamber all possesses, so the value-added tax function of fragmentation test device can utilize existing Material Testing Machine to realize completely.The Material Testing Machine of specialty is quite ripe at aspects such as Machine Design, housing rigidity, noise reduction, algorithm design, and its loading accuracy is high with the loading system that reliability carries than fragmentation test device.
In Fiber Fragmentation Test, the judgement of fiber fracture is mainly contained to two kinds of methods: a kind of is the method for acoustic emission detection, its principle is under the effect of pumping signal (sound wave, vibration), fiber incision position, because its uncontinuity will produce stress wave, just can obtain Fiber Fragmentation parameter by analyzing stress wave.Another kind is the method for machine vision, and its principle is to capture characteristic image analytical characteristic value by microscope, camera, image pick-up card and image processing algorithm.Than acoustic emission detection method, the method for machine vision has exclusive advantage.First, machine vision is a kind of contactless, undamaged detection mode, and being different from acoustic emission detection method need to stick sensor at test specimen two ends; Secondly, although the acoustic emission detection method in real time section of recording is split generation and the position distribution of fracture in process of the test, but need to buy signal collecting device and the signal analysis software of a set of special use, and a set of like this acoustic emission detection system can not be clapped and got the picture that test specimen section is split.Yet machine vision method can meet the requirement that pictures taken is even recorded a video in monitoring test process just, under the hardware collocation of certain precision and the support of algorithm design, the precision of machine vision can guarantee.
Based on this, coordinate existing Material Testing Machine, the present invention adopts machine vision method, the fragmentation test device that exploitation contains Digital Image Processing module and motion and control module.Wherein, image processing module comprises microlens, CCD camera, image pick-up card and image processing software.Software algorithm is write voluntarily, comprises merging algorithm for images and image detection two parts, can realize monitoring and the observation of Fiber Fragmentation Test process.The micron order that typically has a diameter from due to tested fiber, for guaranteeing that the image collecting has enough precision and resolution, microlens should have enough enlargement ratios, this will cause microscopic field of view to diminish, the visual field of single shot is difficult to cover whole test specimen, so need to develop a motion and control module for controlling the motion of microlens, clap respectively and get the different local images of test specimen, then by stitching algorithm, splice the overall situation that obtains test specimen and scheme.
Summary of the invention
The invention provides a kind of fragmentation test device based on machine vision, be used in conjunction with Material Testing Machine, complete fragmentation test.Content comprises development machine vision module and develops corresponding algorithm, the motion of exploitation microlens and control module, can carry out to Fiber Fragmentation data the analyzing and processing in later stage simultaneously.Compare with the fragmentation test device of manual loading, the present invention has realized robotization fibre breakage observation and analysis function by limited cost price, realizes continuous controlled loading by Material Testing Machine simultaneously, and test degree of accuracy and repeatability obviously improve.Different from the fragmentation test equipment that carries charger, during Fiber Fragmentation Test, required value-added tax function utilizes existing Material Testing Machine to carry out, designed, designed and the development of monitoring function software and hardware part, had so both guaranteed the precision that test loads, and had reduced again instrument cost; Its independently microscopic observation architecture design be convenient to further application and development and functions expanding.
The technical solution used in the present invention is: a kind of fragmentation test device based on machine vision, wherein, comprise base, be located at the Programmable Logic Controller on base, the servo controller being electrically connected to Programmable Logic Controller, the servomotor that is electrically connected to servo controller; Described servomotor is connected with gear train, and servomotor vertically moves for drive transmission device, installs for observing the image collecting device of test specimen fibre breakage position on described gear train.
In the present invention, adopt the method based on machine vision, realize the monitoring to process of the test, extract fibre breakage feature, judgement section is split process, after test stops, automatically calculates fibre diameter
dand critical length
, calculate thus interface shear strength IFSS.Specifically, image collecting device gathers the partial enlarged drawing picture of fiber, in order to overcome, to amplify rear lens visual field and diminish and can not monitor the problem of fiber overall picture, adopt Image Mosaics technology that partial enlarged drawing is looked like to be spliced into overall situation figure, for fracture characteristic, extract and analyze, with this, judge Fiber Fragmentation critical length and calculate interface shear strength.For Image Mosaics problem, designed driven by servomotor gear train and vertically moved, realize vertical movement and the position control of image collecting device, to gather each local enlarged image of fiber, for splicing.
Programmable Logic Controller (Programmable Logic Controller, PLC) be a kind of novel general automation control device, it combines traditional Control technology, computer technology and mechanics of communication together, the instruction of the operation such as the computing of memory stores actuating logic, sequential operation, timing, counting and the arithmetical operation that its inner employing can program, and can, by digital or analog input and output, control various types of machinery or production run.The present invention adopts PLC the steering order of PC to be output as to the control signal of servo controller.
Servo controller is for controlling a kind of controller of servomotor, is the core of servo-drive system.Servo controller is generally controlled servomotor by position, speed and three kinds of modes of torque, realizes high-precision kinematic train location.
Servomotor refers to the engine of controlling mechanical organ running in servo-drive system, is the indirect speed change gear of a kind of subsidy motor.Servomotor control rate and position are very accurate, voltage signal can be converted into torque and rotational speed to drive control object.With respect to stepper motor, servomotor have control accuracy high, react the feature such as fast.AC servo motor is the most frequently used servomotor, with sinusoidal wave, controls, and torque pulsation is little.
Further, described image acquisition mechanism comprise eyepiece, the zoom rate camera lens main body being connected with eyepiece, the sleeve being connected with zoom rate camera lens main body, the adapter ring being connected with sleeve, the camera that is connected with adapter ring; The central axis of above-mentioned eyepiece, zoom rate camera lens main body, sleeve, adapter ring, camera is located along the same line.
The function of image collecting device is to realize the collection of topography in process of the test.Eyepiece, zoom rate camera lens main body, sleeve project on the photo-sensitive cell of camera after the fibre image at focal length place is amplified, and through camera, convert digital signal input computing machine to, by image processing software, are shown and post-processed.Its whole optical amplifier multiplying power is 1.4～9 times, and field range is 9.2 * 6.9～1.5 * 1.1mm
2, highest resolution 1280*1024, supports the parameters such as labview programming Control time shutter, gain, brightness.
Further, described image collecting device connects governor motion, for regulating the position of x direction and y direction; Governor motion is provided with lens fixing base, and sleeve is fixedly connected with through lens fixing base.By lens fixing base is set, image collecting device can be vertically moved together with gear train.Described governor motion comprises two fine setting screw rods of x-y displacement platform, x direction and y direction.The bottom of described x-y displacement platform is also provided with web member, and web member is " L " type, and its one end is fixedly connected with gear train, and the other end is fixedly connected with x-y displacement platform.X-y displacement platform is fixed on gear train by a web member, and xy direction respectively has a fine setting screw rod, can carry out 25 * 25mm scope Precision trimming, trimming precision 0.01mm, and load 3kg, for aligning and the manual focusing of camera lens.
Further, test unit also comprises the motor fixing plate being fixedly connected with servomotor, the motor bearings being connected with servomotor, motor bearings connection for transmission mechanism.Described gear train is leading screw, and the central axis of servomotor and leading screw is on same straight line.Ball-screw is comprised of screw rod, nut and ball.Its function is by rotatablely moving, to change into rectilinear motion.After servomotor is connected with the bearing of ball-screw lower end and tightens up, rotatablely moving of motor converts rectilinear motion to via leading screw, the vertical position of adjustable lens part.
Further, the enlargement ratio of described zoom rate camera lens main body is 0.7～4.5 times, and camera is CMOS black and white industrial camera.In this programme, camera lens adopts AFTvision ZL0911 zoom convergent-divergent industrial lens, and this camera lens has the features such as sharpness is high, variable power, optics is undistorted, high-contrast.Adopt telecentric iris method, measuring error is few, can coordinate mega pixel above 1/3 ", 1/2 ", and 2/3 " industrial camera is used, for Vision Builder for Automated Inspection such as high precision detection, high precision dimensional measurement, location, target location.Camera lens enlargement ratio is 0.7～4.5 times, operating distance 88～93mm.
Industrial camera can be divided into CCD and CMOS camera according to sensor type difference conventionally.The difference of CCD and CMOS is: the manufacturing starting of ccd sensor early, technology is relatively ripe, adopt PN junction to close silicon dioxide separation layer noise isolation, the relative cmos sensor of image quality has some superiority, but ccd sensor exists complex process at present, cost is high, power consumption is large, pixel promotes the problems such as difficulty is large.And CMOS speed is fast, power consumption is little, can on each original pixels, realize signal and amplify, and can realize rapid data scanning on the basis of low energy consumption, has also reduced the noise jamming that transmitting procedure is brought simultaneously.In addition, CMOS can produce on general semiconductor production line, and its manufacturing cost is cheaper.
Comprehensive analysis above, the present invention adopts the CMOS black and white industrial camera of MV-1300UM model, and its highest resolution is 1280*1024, Pixel Dimensions 5.2 μ m*5.2 μ m, frame per second 15fps1280*1024,45fps640*480, optical dimensions is 1/2 ".This camera has that high resolving power, high precision, high definition, color rendition are good, low noise, cost performance advantages of higher, adopts USB2.0 standard interface, easy to install, is applicable to very much the various industrial detection application of indoor and outdoor.MV-1300UM industrial camera can pass through external signal triggering collection or continuous acquisition.
Further, servomotor is the HF-KN13J-S100 of Mitsubishi AC servo motor, has the low power feature of low inertia, and applicable load rotating inertia has the machinery of change to use, and its resolution is 10000p/rev, and rated speed 5000 turns.
Principle of work: host computer is by the programming port communication of serial ports and Programmable Logic Controller.Host computer transmits control signal to Programmable Logic Controller, output switching signal after the program of setting in Programmable Logic Controller execution internal memory, and servo controller is controlled servomotor according to the switching signal of Programmable Logic Controller output and is rotated.Servomotor and leading screw are connected, and leading screw changes into the rotation of motor the rectilinear motion of vertical direction, with this, drives moving up and down of image collecting device, realize panorama and observe.
A control method of utilizing the described fragmentation test device based on machine vision, comprises the following steps:
S1. make test required be embedded with filamentary matrix material test specimen (18), test specimen (18) is fixed in Material Testing Machine by fixture;
S2. control the rotation of servomotor, adjust the position of x-y displacement platform in the mid point of leading screw, make the center of the center aligning test specimen of eyepiece;
S3. start Material Testing Machine test specimen is carried out to tension test, start this fragmentation test device simultaneously, its image acquisition mechanism obtains fibre breakage image by longitudinally moving up and down;
S4. obtained fibre image being carried out to fiber fracture judges and segment of fiber counting number;
When S5. counting no longer increases, stop testing the line length of going forward side by side and calculate, then according to mechanical model, calculate the interface shear strength IFSS between this fiber and matrix.
Compared with prior art, beneficial effect is: the present invention is the fragmentation test device being used in conjunction with general material test machine, in process of the test, stretching loading and the displacement measurement of sample completes by Material Testing Machine, guarantee loading and displacement measurement precision on the one hand, reduced on the other hand the cost of instrument.The major function of this device is microscopic observation and fracture analysis, its application is not limited to Fiber Fragmentation Test, by appropriate reconstruction, can also be extended to the field that other need to be observed sample, such as crack expansion test, biological tissue's tiny sampler mechanical test etc.; This expansibility is that other existing apparatus are not available.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present invention.
Fig. 2 is motion structure schematic diagram of the present invention.
Fig. 3 is fragmentation test operative scenario figure of the present invention.
Wherein: 1-eyepiece, 2-zoom rate camera lens main body, 3-sleeve, 4-adapter ring, 5-camera, 6-lens fixing base, 7-x-y displacement platform, 8-finely tunes screw rod, 9-web member, 10-leading screw, 11-servomotor, 12-Programmable Logic Controller, 13-servo controller, 14-base, 15-feet, 16-front shroud, 17-Material Testing Machine, 18-test specimen, this device of 19-, 20-motor bearings, 21-motor fixing plate.
Embodiment
Accompanying drawing, only for exemplary illustration, can not be interpreted as the restriction to this patent; For better explanation the present embodiment, some parts of accompanying drawing have omission, zoom in or out, and do not represent the size of actual product; To those skilled in the art, in accompanying drawing some known configurations and explanation thereof may to omit be understandable.
As Figure 1-3, a kind of fragmentation test device based on machine vision, wherein, comprise base 14, be located at the Programmable Logic Controller 12 on base 14, the servo controller 13 being electrically connected to Programmable Logic Controller 12, the servomotor 11 that is electrically connected to servo controller 13; Servomotor 11 is connected with gear train 10, and servomotor 11 vertically moves for drive transmission device 10, and gear train 10 is provided with for observing the image collecting device of test specimen fibre breakage position.
In the present embodiment, the motion control scale of device is less, and IO interface is less, and use 8 is entered 8 small-sized programmable controllers that go out 12 and can be met the demands.In position control, need to send pulse with Programmable Logic Controller 12 and realize displacement, therefore use transistor to be output as suitable.The movement velocity of considering camera lens is slower, belongs to low speed and controls, and coordinates electronic gear to regulate, conventionally the pulsed frequency of 100kps is enough used, therefore select Mitsubishi's FX3u-16M Programmable Logic Controller as host computer, its functional characteristic is enough realized the requirement of this device, and price is also lower.
In the present embodiment, the MR-E-10A-KH003 type digital servo controller that servo controller 13 uses Mitsubishi to produce, this controller adopts socket martingale, time simple to operate, keep again the high-level hands-off tuning of J2 super Series Controller, the performances such as setting, self-adaptation damping that gain, can communicate to connect by RS232C the operations such as the enterprising line parameter setting of PC, trial run, test.
In the present embodiment, the servomotor 11Wei HF-KN13J-S100 of Mitsubishi AC servo motor, has the low power feature of low inertia, and applicable load rotating inertia has the machinery of change to use, and its resolution is 10000p/rev, and rated speed 5000 turns.
Image collecting device comprises eyepiece 1, the zoom rate camera lens main body 2 being connected with eyepiece 1, the sleeve 3 being connected with zoom rate camera lens main body 2, the adapter ring 4 being connected with sleeve 3, the camera 5 that is connected with adapter ring 4; The central axis of above-mentioned eyepiece 1, zoom rate camera lens main body 2, sleeve 3, adapter ring 4, camera 5 is located along the same line.The function of image collecting device is to realize the collection of topography in process of the test.Eyepiece, zoom rate camera lens main body, sleeve project on the photo-sensitive cell of camera after the fibre image at focal length place is amplified, through camera, convert digital signal input computing machine to, by image processing software, shown and post-processed, its whole optical amplifier multiplying power is 1.4～9 times, and field range is 9.2 * 6.9～1.5 * 1.1mm
2, highest resolution 1280*1024, supports the parameters such as labview programming Control time shutter, gain, brightness.
Wherein, in the present embodiment, the enlargement ratio of zoom rate camera lens main body 2 is 0.7～4.5 times, and camera is CMOS black and white industrial camera.In this programme, camera lens adopts AFTvision ZL0911 zoom convergent-divergent industrial lens.This camera lens has the features such as sharpness is high, variable power, optics is undistorted, high-contrast.Adopt telecentric iris method, measuring error is few, can coordinate mega pixel above 1/3 ", 1/2 ", and 2/3 " industrial camera is used, for Vision Builder for Automated Inspection such as high precision detection, high precision dimensional measurement, location, target location.Camera lens enlargement ratio is 0.7～4.5 times, operating distance 88～93mm.The present invention adopts the CMOS black and white industrial camera of MV-1300UM model, and its highest resolution is 1280*1024, Pixel Dimensions 5.2 μ m*5.2 μ m, and frame per second 15fps1280*1024,45fps640*480, optical dimensions is 1/2 ".This camera has that high resolving power, high precision, high definition, color rendition are good, low noise, cost performance advantages of higher, adopts USB2.0 standard interface, easy to install, is applicable to very much the various industrial detection application of indoor and outdoor.
Image collecting device is connected with for regulating the governor motion of x direction and the y direction of image collecting device, and governor motion is provided with lens fixing base 6, and sleeve 3 is fixedly connected with through lens fixing base 6.Governor motion comprises x-y displacement platform 7, for regulating two fine setting screw rods 8 of the x direction of image collecting device and y direction.The bottom of x-y displacement platform 7 is also provided with web member 9, and web member 9 is " L " type, and its one end is fixedly connected with gear train 10, and the other end is fixedly connected with x-y displacement platform 7.By lens fixing base 6 is set, thereby image collecting device can vertically be moved together along with the vertical movement of gear train.X-y displacement platform is fixed on gear train 10 by a web member 9, and xy direction respectively has a fine setting screw rod 8, can be at 25 * 25mm scope Precision trimming, and trimming precision 0.01mm, load 3kg, for aligning and the manual focusing of camera lens.
Test unit also comprises the motor fixing plate 21 being fixedly connected with servomotor 11, the motor bearings 20 being connected with servomotor 11, motor bearings 20 connection for transmission mechanisms 10.Gear train 10 is leading screw, and the central axis of servomotor 11 and leading screw is on same straight line.Ball-screw 10 is that gyration is converted into rectilinear motion, or rectilinear motion is converted into the desirable product of gyration.Ball-screw 10 is comprised of screw rod, nut and ball.Its function is by rotatablely moving, to change into rectilinear motion, and owing to having very little frictional resistance, ball-screw is widely used in various commercial units and exact instrument.After servomotor is connected with the bearing of ball-screw lower end and tightens up, rotatablely moving of motor 11 converts rectilinear motion to via leading screw, the vertical position of adjustable lens part.
In Fig. 1, front shroud 16 is in closed condition in working order time, and the bottom of base 14 is provided with feet 15, during use, Programmable Logic Controller 12 is by programmed control servo controller 13, and servo controller 13 is controlled servomotor 11 by transmitted and carried out regular rotation.The rotation of servomotor 11 drives leading screw 10 carry out regular and controllably move up and down.And, by leading screw displacement platform web member 9, be fixed on the x-y displacement platform 7 on leading screw, also will drive the camera lens be fixed on x-y displacement platform 7 by lens fixing base 6 to carry out regular motion, thereby realize obtaining of image in fibre breakage process.
A control method of utilizing the fragmentation test device based on machine vision, comprises the following steps:
1) make test required be embedded with ultimate fibre compound substance test specimen 18, according to Fig. 3, test specimen 18 is fixed in Material Testing Machine 17 by fixture.The present invention and Material Testing Machine 17 are put by shown in Fig. 3;
2) as shown in Figure 3, by computer relative program, control the rotation of servomotor (11), adjust x-y displacement platform 7 positions in the mid point of leading screw 10, test specimen 18 center is aimed at the center of eyepiece 1;
3) start 17 pairs of test specimens of Material Testing Machine 18 and carry out tension test, start this fragmentation test device simultaneously, make camera lens carry out the fibre breakage image that moving up and down in vertical direction obtained the test specimen overall situation.The difference of speed and the difference of test specimen 18 while carrying out Mechanical loading due to Material Testing Machine 17, the movement velocity of camera lens is adjustable within the specific limits;
4) obtained fibre image being carried out to fiber fracture judges and segment of fiber counting number;
5) when counting no longer increases, stop testing the line length of going forward side by side and calculate, then according to mechanical model, calculate the interface shear strength IFSS between this fiber and matrix.
The present embodiment has completed fragmentation test by a series of measure, the method of using and the difference of classic method are, the accessory that this device can be used as general material test machine is used, Mechanical loading and displacement measurement function are completed by Material Testing Machine, the measurement of the monitoring of fibre breakage process, analysis and fracture characteristic length and fibre diameter realizes by machine vision technique, has ease for use and expansibility.
Obviously, the above embodiment of the present invention is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all embodiments.All any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in the protection domain of the claims in the present invention.
Claims (10)
1. the fragmentation test device based on machine vision, it is characterized in that, comprise base (14), be located at the Programmable Logic Controller (12) on base (14), the servo controller (13) being electrically connected to Programmable Logic Controller (12), the servomotor (11) that is electrically connected to servo controller (13); Described servomotor (11) connection for transmission mechanism (10), servomotor (11) vertically moves for drive transmission device (10), and the upper image collecting device of installing of described gear train (10), for observing test specimen fibre breakage position.
2. a kind of fragmentation test device based on machine vision according to claim 1, it is characterized in that, described image collecting device comprises eyepiece (1), the zoom rate camera lens main body (2) being connected with eyepiece (1), the sleeve (3) being connected with zoom rate camera lens main body (2), the adapter ring (4) being connected with sleeve (3), the camera (5) being connected with adapter ring (4); The central axis of above-mentioned eyepiece (1), zoom rate camera lens main body (2), sleeve (3), adapter ring (4), camera (5) is located along the same line.
3. a kind of fragmentation test device based on machine vision according to claim 2, it is characterized in that, described image collecting device connects governor motion, for regulating the position of its x direction and y direction, governor motion is provided with lens fixing base (6), and sleeve (3) is fixedly connected with lens fixing base (6).
4. a kind of fragmentation test device based on machine vision according to claim 3, it is characterized in that, described governor motion comprises x-y displacement platform (7), for regulating image collecting device x direction and y direction position two fine setting screw rods (8).
5. a kind of fragmentation test device based on machine vision according to claim 4, it is characterized in that, the bottom of described x-y displacement platform (7) is also provided with web member (9), web member (9) is " L " type, its one end is fixedly connected with gear train (10), and the other end is fixedly connected with x-y displacement platform (7).
6. according to the arbitrary described a kind of fragmentation test device based on machine vision of claim 1 to 5, it is characterized in that, test unit also comprises the motor fixing plate (21) being fixedly connected with servomotor (11), the motor bearings (20) being connected with servomotor (11), motor bearings (20) connection for transmission mechanism (10).
7. a kind of fragmentation test device based on machine vision according to claim 6, is characterized in that, described gear train (10) is leading screw, and the central axis of servomotor (11) and leading screw is on same straight line.
8. a kind of fragmentation test device based on machine vision according to claim 2, is characterized in that, the enlargement ratio of described zoom rate camera lens main body (2) is 0.7～4.5 times, and camera (5) is CMOS black and white industrial camera.
9. a kind of fragmentation test device based on machine vision according to claim 1, is characterized in that, described servomotor (11) is AC servo motor, and its resolution is 10000p/rev, and rated speed 5000 turns.
10. a control method of utilizing the fragmentation test device based on machine vision described in claim 7, is characterized in that comprising the following steps:
S1. make test required be embedded with filamentary matrix material test specimen (18), test specimen (18) is fixed in Material Testing Machine by fixture;
S2. control the rotation of servomotor, adjust the position of x-y displacement platform in the mid point of leading screw, make eyepiece center aim at the center of test specimen;
S3. start Material Testing Machine test specimen is carried out to tension test, start this fragmentation test device simultaneously, its image collecting device obtains the fibre image of the test specimen overall situation by longitudinally moving up and down;
S4. obtained fibre image being carried out to fiber fracture judges and segment of fiber counting number;
When S5. counting no longer increases, stop testing the line length of going forward side by side and calculate, then according to mechanical model, calculate the interface shear strength IFSS between this fiber and matrix.
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| CN105301754A (en) * | 2015-11-26 | 2016-02-03 | 深圳市华显光学仪器有限公司 | Embedded microscope |
| CN106596296A (en) * | 2017-02-25 | 2017-04-26 | 浙江理工大学 | Single fiber interfacial shear strength testing method and device |
| CN108254309A (en) * | 2018-03-11 | 2018-07-06 | 北京工业大学 | Towards the cohesive force automatic detection device and method of excimer laser micro Process device |
| CN108535099A (en) * | 2017-03-01 | 2018-09-14 | 天津工业大学 | A method of interface shear strength between characterization high-performance fiber and non-transparent resin matrix |
| US20220065739A1 (en) * | 2020-09-03 | 2022-03-03 | University Of South Carolina | Vibration Test-Cell with Axial Load and In-Situ Microscopy |
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| CN105301754A (en) * | 2015-11-26 | 2016-02-03 | 深圳市华显光学仪器有限公司 | Embedded microscope |
| CN106596296A (en) * | 2017-02-25 | 2017-04-26 | 浙江理工大学 | Single fiber interfacial shear strength testing method and device |
| CN108535099A (en) * | 2017-03-01 | 2018-09-14 | 天津工业大学 | A method of interface shear strength between characterization high-performance fiber and non-transparent resin matrix |
| CN108254309A (en) * | 2018-03-11 | 2018-07-06 | 北京工业大学 | Towards the cohesive force automatic detection device and method of excimer laser micro Process device |
| US20220065739A1 (en) * | 2020-09-03 | 2022-03-03 | University Of South Carolina | Vibration Test-Cell with Axial Load and In-Situ Microscopy |
| US11680869B2 (en) * | 2020-09-03 | 2023-06-20 | University Of South Carolina | Vibration test-cell with axial load and in-situ microscopy |
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