Wyniki wyszukiwania - BazTech

1

Przygotowanie ekstraktów polisacharydowych pyłku chryzantemy i ich wpływ na komórki in vitro raka jelita grubego

Fang Z., Luo R., Jiang M., Jiang G., Fu M., Chen S., Lai X.

Przemysł Chemiczny

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2018

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T. 97, nr 10

1733--1736

PL

Polisacharydy zawarte w pyłku chryzantem ekstrahowano wodą i wytrącano przy użyciu alkoholu. Cukier o charakterze obojętnym i 2 cukry o charakterze kwasowym rozdzielono, stosując chromatografię jonowymienną. Skład monosacharydów oznaczono metodą wysokosprawnej chromatografii cieczowej. Działanie przeciwnowotworowe polisacharydów oceniano, badając ich wpływ na proliferację komórek nowotworowych. Hamowanie proliferacji HCT116 nie było znaczące, gdy stężenie wynosiło 5 mg/mL (p > 0,05), jednak działanie to w stosunku do komórek nowotworowych HCT116 i HT-29 było znaczące przy tym samym stężeniu (p < 0,05). Nieprzetworzone wyciągi polisacharydowe miały większy wpływ na proliferację komórek in vitro raka jelita grubego niż poszczególne polisacharydy.

EN

Polysaccharides were extd. from Dendranthema indicum var. Asteraceae bee pollens with H2O (yield 7.9%), pptd. with EtOH and sepd. by ion-exchange chromatog. into a neutral sugar and 2 acidic ones. The monosaccharide compn. was detd. by high performance liq. chromatog. They contained rhamnose, galacturonic acid, glucose, galactose and arabinose. The anticancer activity of the polysaccharides was evaluated by studying their effect on proliferation of HCT116 and HT-29 cancer cells. The inhibitory effect of individual sugars on the proliferation of HCT116 was not significant when their concns. were 5 mg/mL, but the total polysaccharides showed a significant effect on proliferation of HCT116 and HT-29 tumor cells at the same concn

2

Moving-aperture-based three-dimensional micro-measurement system

Fan S., Yu M., Jiang G., Wang Y., Wang W., Li W.

Optica Applicata

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2018

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Vol. 48, nr 4

533--547

EN

To overcome the depth-of-field limitation of an optical microscope image, a three-dimensional measurement method with a superior depth-of-field is proposed. In the proposed method, light-field information of different angles is obtained by moving the aperture and the three-dimensional scene is reconstructed by using a computational reconstruction technology. First, stereo matching of different aperture position images is performed to obtain the multi-aperture imaging deviation. The focal plane moving distance is thereby estimated. Then, the relational expression between the image coordinates and the focal plane moving distance is determined according to the image coordinates. Two dimensional coordinates of the space point are obtained by the expression coefficients. Finally, the depth coordinates are computed, and three-dimensional reconstruction of the spatial points is completed. Experiments of three-dimensional measurements of the calibration board with different angles and circuit boards are conducted. The results show that the maximum error of the distance measurement is controlled into 0.84%, and the maximum angle measurement error is controlled into 4.56%.

3

3-D Simulation of Double-Bar Plush Fabrics with Jacquard Patterns

Zhang A., Li X., Jiang G., Dong Z., Cong H.

Autex Research Journal

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2018

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Vol. 18, no. 3

243--250

EN

A realistic computerized simulation of double-bar plush fabrics can result in a time-saving development process with high quality. Based on basic analysis of jacquard principles, a fast 3-D simulation method of warp-knitted plush fabrics is proposed by using a geometry shader on GPU. Firstly, pile areas and non-pile areas are identified according to the jacquard design graphs and chain notations. According to the directions of observation and raised pile, two layered chips are formed in the geometry shader with an approach of multi-layered textures. To ensure that the simulated piles resemble the real ones, the directions of the piles are randomized with the Perlin noise method. One pile is generated along its length with numerous layers in the plush fabric model. Simulation results of piles on both the technical face and technical back are obtained via the model built above, which is confirmed with practicability and efficiency. This 3D simulation approach improves the visualization appearance of piles just as they are actually raised.

4

Thermal Mechanical Stress Analysis of Ladle Lining with Integral Brick Joint

Chang W., Li G., Kong J., Sun Y., Jiang G., Liu H.

Archives of Metallurgy and Materials

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2018

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Vol. 63, iss. 2

659--666

EN

Based on the theory of heat transfer, the influence of expansion joints on the temperature and stress distribution of ladle lining is discussed. In view of the current expansion joint, the mathematical model of heat transfer and the three dimensional finite element model of ladle lining brick are established. By analyzing the temperature and stress distribution of ladle lining brick when the expansion joints are in different sizes, the thermal mechanical stress caused by the severe temperature difference can be reduced by the suitable expansion joint of the lining brick during the ladle baking and working process. The analysis results showed that the thermal mechanical stress which is caused by thermal expansion can be released through the 2 mm expansion joint, which is set in the building process. So we can effectively reduce the thermal mechanical stress of the ladle lining, and there is no risk of steel leakage, thus the service life of ladle can be effectively prolonged.

5

Warp-knitted Fabric Defect Segmentation Based on the Shearlet Transform

Dong Z., Xia D., Ma P., Jiang G.

Fibres & Textiles in Eastern Europe

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2017

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Vol. 25, no. 5 (125)

87--94

EN

The Shearlet transform has been a burgeoning method applied in the area of image processing recently which, differing from the Wavelet transform, has excellent properties in processing singularities for multidimensional signals. Not only is it similar to the performance of the Curvelet transform, it also overcomes the disadvantage of the Curvelet transform with respect to discretization. In this paper, the Shearlet transform with segmented threshold de-nosing is proposed to segment a warp-knitted fabric defect. Firstly a warp-knitted fabric image of size 512*512 is filtered by the Laplacian Pyramid transform and decomposed into low frequency and high frequency coefficients. Secondly the high frequency coefficients are operated with a pseudo-polar grid and then convoluted by the window function. Thirdly the shearlet coefficients will be obtained through redefining the Cartesian coordinates from the pseudo-polar grid coordinates and de-noised by the segmented threshold method. Then the coefficients which have high energy are selected for reconstruction in an inverse way using the previous steps. Finally the iterative threshold method and object operation based on morphology are applied to segment out the defect profile. The experiment’s result states that the Shearlet transform shows excellent performance in segmenting a common warp-knitted fabric defect, indicating that the segment results can be applied for further defect automatic recognition.

PL

Transformacja Shearleta jest ostatnio dynamicznie rozwijającą się metodą stosowaną w dziedzinie przetwarzania obrazu, która różni się od transformaty Wavelet i ma doskonałe właściwości w przetwarzaniu sygnałów wielowymiarowych. Transformacja Shearleta ma prostszą implementację dyskretną, niż przekształcenie Curveleta w oparciu o rygorystyczne i proste ramy matematyczne. Może także dostarczyć bardziej elastycznego rozkładu na podstawie reprezentacji wieloskalowej i geometrycznej. Ostateczny wynik segmentacji uzyskano poprzez powtarzalną segmentację progową i operację morfologiczną. Wyniki wykazały, że segmentowy profil uszkodzeń jest dość wyraźny i porównywalny w porównaniu z pierwotnymi wadami dzianiny.

6

Design of Rascheltronic Vamp Fabric with Double-Colour Pitting Effect

Li X., Zhang A., Jiang G.

Fibres & Textiles in Eastern Europe

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2017

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Vol. 25, no. 3 (123)

92--97

EN

Applications of Piezo jacquard and CAD technology in warp-knitting have provided traditional jacquard fabrics with the possibility of innovating the structure design. Research on innovative design and fabrication is conducted aiming at knitting jacquard vamp fabric with the double-colour pitting effect on a technical back. By utilising Piezoelectric jacquard’s performance of displacing both underlapping and overlapping, new structures are formed, such as mesh stitches, koper stitches and float structures. Based on threading with yarns in two colors, jacquard bars in split execution create a pattern with a double-colour effect. To realize a highly efficient design, the paper proposes a computer-aided jacquard design method covering technical parameters and jacquard pattern design modules. Additionally, to pursue convenience and efficiency, mathematic models are built in terms of an automatic borderline design, loop stitching inspection and structure database. The method of jacquard vamp fabric design with a double-color pitting effect has been proven practically by illustrating a vamp design example which meets the requirement of fashion and performance well.

PL

Projektowanie dzianin dwukolorowych z efektem pittingu jest możliwe przy użyciu komputerowego systemu projektowania opartego na specjalnej metodzie dziewiarskiej. Dzięki macierzy i modelowi matematycznemu system obejmuje wszystkie podstawowe parametry techniczne modułów projektowego i kontrolnego oraz modułu bazy danych struktur, które współpracują w celu sprawnego projektowania dzianiny. Na podstawie otrzymanych wyników badań stwierdzono, że wspomagana komputerowo metoda projektowania może być z powodzeniem stosowana w projektowaniu dzianin dwukolorowych z efektem pittingu.

7

Warp-Knitted Fabric Defect Segmentation Based on Non-Subsampled Wavelet-Based Contourlet Transform

Xia D., Jiang G., Ma P.

Autex Research Journal

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2017

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Vol. 17, no. 4

319--327

EN

In this paper, a non-subsampled wavelet-based contourlet transform (NWCT) is applied in warp-knitted fabric defect segmentation. Compared with the traditional contourlet transform, wavelet transform takes the place of Laplacian pyramid in NWCT and the directional filter bank is non-subsampled. The wavelet transform with improved wavelet threshold is put to use, and the original fabric image can be decomposed into low-frequency approximate coefficient A and high-frequency detail coefficients V, H, and D. The high-frequency detail coefficients are processed by the non-subsampled directional filter bank to get directional sub-band coefficients. Afterward, the effective sub-band coefficients based on regional energy are chosen to reconstruct V, H, and D. And the reconstructed fabric image will be achieved by inverse non-subsampled wavelet-based contourlet transform. The adaptive threshold method and morphological processing are used to obtain the legible defect profile. The experiment demonstrates that NWCT can achieve the positive segmentation regarding the common defects, such as broken warp, width barrier, and oil, and has excellent performance on these directional defects and regional defects. It is acknowledged that NWCT will provide a new way to detect warp-knitted fabric defects automatically.

8

The Effect of Knitting Parameter and Finishing on Elastic Property of PET/PBT Warp Knitted Fabric

Chen Q., Ma P., Mao H., Miao X., Jiang G.

Autex Research Journal

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2017

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Vol. 17, no. 4

250--260

EN

This study investigated the elastic elongation and elastic recovery of the elastic warp knittedfabric made of PET (polyethylene terephthalate) and PBT (polybutylene terephthalate) filament. Using 50/24F PET and 50D/24F PBT in two threadingbars, the tricot, locknit and satin warp knitted fabrics were produced on the E28 tricot warpknitting machine. The knitting parameters influencing the elastic elongation under 100N wereanalyzed in terms of fabric structure, yarn run-in speed and drawing density set on machine.Besides, dyeing temperature and heat setting temperature/time were also examined in order toretain proper elastic elongation and elastic recovery. The relationship between elastic elongationand knitting parameter and finishing parameter were analyzed. Finally, the elastic recovery of PET/PBT warp knitted fabric was examined to demonstrate the elastic property of final finishedfabric. This study could help us to further exploit the use of PET/PBT warp knitted fabric in thedevelopment of elastic garment in future.

9

Rapid Simulation of Flat Knitting Loops Based On the Yarn Texture and Loop Geometrical Model

Lu Z., Jiang G.

Autex Research Journal

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2017

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Vol. 17, no. 2

103--110

EN

In order to create realistic loop primitives suitable for the fast computer-aided design (CAD) of the flat knitted fabric, we have a research on the geometric model of the loop as well as the variation of the loop surface. Establish the texture variation model based on the changing process from the normal yarn to loop that provides the realistic texture of the simulative loop. Then optimize the simulative loop based on illumination variation. This paper develops the computer program with the optimization algorithm and achieves the loop simulation of different yarns to verify the feasibility of the proposed algorithm. Our work provides a fast CAD of the flat knitted fabric with loop simulation, and it is not only more realistic but also material adjustable. Meanwhile it also provides theoretical value for the flat knitted fabric computer simulation.

10

Flat Knitting Loop Deformation Simulation Based on Interlacing Point Model

Jiang G., Lu Z., Cong H., Zhang A., Dong Z., Jia D.

Autex Research Journal

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2017

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Vol. 17, no. 4

361--369

EN

In order to create realistic loop primitives suitable for the faster CAD of the flat-knitted fabric, we have performed research on the model of the loop as well as the variation of the loop surface. This paper proposes an interlacing point-based model for the loop center curve, and uses the cubic Bezier curve to fit the central curve of the regular loop, elongated loop, transfer loop, and irregular deformed loop. In this way, a general model for the central curve of the deformed loop is obtained. The obtained model is then utilized to perform texture mapping, texture interpolation, and brightness processing, simulating a clearly structured and lifelike deformed loop. The computer program LOOP is developed by using the algorithm. The deformed loop is simulated with different yarns, and the deformed loop is applied to design of a cable stitch, demonstrating feasibility of the proposed algorithm. This paper provides a loop primitive simulation method characterized by lifelikeness, yarn material variability, and deformation flexibility, and facilitates the loop-based fast computer-aided design (CAD) of the knitted fabric.

11

Disparity servoing based fast autofocusing method for stereomicroscope

Liu Y., Yu M., Cui L., Jiang G., Wang G., Fan S.

Optica Applicata

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2016

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Vol. 46, nr 4

651--663

EN

A disparity servoing based fast autofocusing method is proposed for stereomicroscopes according to linear relationship between the disparity change in stereomicroscopic images and the move distance of a motorized translation stage. For a certain stereomicroscope, the calibration of a disparity range of clear images at each magnification is implemented offline. After that, the disparity of the stereomicroscopic image is used as an index to represent the sharpness of an arbitrary image. If the disparity does not satisfy the requirement, move steps and direction of a step motor are calculated by utilizing the linear relationship between the disparity change and the move distance of the stage. The iteration will be continued until the disparity of the captured stereomicroscopic image approximates to the clearest disparity. The experimental results show that the proposed method only requires a few iterations and less time to reach the focus position, and the disparity error is less than 0.5 pixel.

12

The Development of the Flat-Knitted Shaped Uppers based on Ergonomics

Lu Z., Jiang G., Cong H., Yang X.

Autex Research Journal

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2016

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Vol. 16, no. 2

67--74

EN

To achieve the efficiency and specification of the flat-knitted uppers design, the basic patterns of uppers are made from shoe lasts based on the research on the characteristics of human’s feet and wearability requirements on uppers. The knitting technology for half-shaped and fully shaped uppers was formed after the shear deformation of basic pattern and combination with flat knitting technology. As regards to the functional requirements on key parts of uppers, the structures of flat-knitted shaped uppers were intensively analysed and studied, dividing them into two categories (functional structure and decorative structure), discussing the knitting methods and advantages of different structure, and finally experimentally proving that the planar pattern of flat knitted uppers can apply to the design of flat-knitted uppers and achieve the combination of functionality and artistry of sneakers after combining with structural changes, with a great significance on the achievement of the efficient production of uppers and the enhancement of its commercial value.

13

The Comfort Properties of Two Differential-Shrinkage Polyester Warp Knitted Fabrics

Chen Q., Miao X., Mao H., Ma P., Jiang G.

Autex Research Journal

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2016

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Vol. 16, no. 2

90--99

EN

Single-layered warp knitted fabrics were produced by the 60D/36F (containing 36 filaments) polyester yarn with differential shrinkage (DS) property in this study. Due to the differential shrinkage property, the fabric becomes curly and bulkier, simulating cotton fabric in terms of its appearance and fabric handle. The performance and appearance of these DS polyester warp knitted fabrics were evaluated objectively and subjectively. The testing results demonstrated that the DS polyester warp knitted fabric had better abrasion property, worse pilling resistance due to the mechanical property of polyester yarn when compared with 100% cotton warp knitted fabric. Meanwhile, lower water vapour permeability and air resistance were found for DS polyester warp knitted fabric resulting from the dense structure of yarn shrinkage after heat-moisture treatment. Besides, the fabric handle was evaluated by Kawabata evaluation system and subject to trial under dry and wet fabric condition. DS polyester warp knitted fabrics provide better recovery under low stress mechanical pressure. The subjective evaluation result shows that the warp knitted fabrics made of DS polyester had similar handle against cotton warp knitted fabric in terms of prickle, smooth, comfort and dry feeling in both dry and wet testing conditions.

14

Computer-Aided Design Method of Warp-Knitted Jacquard Spacer Fabrics

Li X., Jiang G., Ma P.

Autex Research Journal

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2016

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Vol. 16, no. 2

51--56

EN

Based on a further study on knitting and jacquard principles, this paper presents a mathematical design model to make computer-aided design of warp-knitted jacquard spacer fabrics more efficient. The mathematical model with matrix method employs three essential elements of chain notation, threading and Jacquard designing. With this model, the processing to design warp-knitted jacquard spacer fabrics with CAD software is also introduced. In this study, the sports shoes which have separated functional areas according to the feet structure and characteristics of movement are analysed. The results show the different patterns on Jacquard spacer fabrics that are seamlessly stitched with jacquard technics. The computer-aided design method of warp-knitted jacquard spacer fabrics is efficient and simple.

15

A super depth of field height measurement based on local disparity

Cui L., Liu Y., Yu M., Jiang G., Fan S., Wang Y.

Optica Applicata

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2015

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Vol. 45, nr 2

205--214

EN

A super depth of field height measurement method is proposed to measure the object height with the optical stereoscopic microscope. The quasi-Euclidean epipolar rectification algorithm is utilized on the original stereoimage to obtain rectified stereoimages and calibrate two camera parameters. Then, feature points are obtained by the SURF (speed up robust feature) algorithm and their corresponding disparities are calculated. The disparity-depth of field curve is fitted by combining the step height values of a stepper motor. Moreover, through local disparity value got from feature points on the object, the relative shift height is calculated through regression analysis. Finally, according to binocular vision geometry, the thickness of the object can be calculated. Experimental results show that the measurement error in Z direction is from 1.51% to 7.71%, which indicates that the proposed method is able to measure the height of a microobject beyond depth of field within a tolerant error.

16

Experimental Investigation on the Compression Behaviours of 3D Angle‑interlock Woven Composites with Carbons Nanotube under High Strain Rates

Ma P, Jiang G, Zhang F, Chen Q, Miao X, Cong H

Fibres & Textiles in Eastern Europe

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2015

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Vol. 23, no. 2 (110)

44--50

EN

The compressive properties of 3D angle-interlock woven/epoxy resin composites with various carbon nanotube (CNTs) contents were investigated under quasi-static and high strain rate loading to evaluate the compressive failure modes, which were influenced by various CNT contents and different strain rates. The results indicated that the stress strain curves were strain rate sensitive, and the compressive failure stress of composites with various CNT contents were increased with a change the strain rates and CNT contents. The compressive failure modes of 3D angle-interlock woven composites without CNT tended to be in shear deformation, delamination fibre breakage and matrix crack together, and the failure modes of 3D angle-interlock woven composites with high CNT contents presented delamination and shear deformation.

PL

Badano właściwości ściskające kompozytów 3D wzmacnianych tkaninami o skośnym splocie interlokowym modyfikowanych nanorurkami węglowymi. W celu wyznaczenia uszkodzeń powstałych na skutek ściskania, na które wpływa zawartość nanorurek i szybkości odkształcania, badania przeprowadzono pod obciążeniem quasi-statycznym i przy dużych szybkościach ściskania. Wyniki wykazały, że krzywe ściskania zależały od szybkości odkształcania i zawartości nanorurek. Uszkodzenia mają charakter rozwarstwienia i deformacji pod wpływem naprężeń ścinających.

17

Knitting Technologies And Tensile Properties Of A Novel Curved Flat-Knitted Three-Dimensional Spacer Fabrics

Li X., Jiang G., Nie X., Ma P., Gao Z.

Autex Research Journal

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2015

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Vol. 15, no. 3

191--197

EN

This paper introduces a knitting technique for making innovative curved three-dimensional (3D) spacer fabrics by the computer flat-knitting machine. During manufacturing, a number of reinforcement yarns made of aramid fibres are inserted into 3D spacer fabrics along the weft direction to enhance the fabric tensile properties. Curved, flat-knitted 3D spacer fabrics with different angles (in the warp direction) were also developed. Tensile tests were carried out in the weft and warp directions for the two spacer fabrics (with and without reinforcement yarns), and their stress–strain curves were compared. The results showed that the reinforcement yarns can reduce the fabric deformation and improve tensile stress and dimensional stability of 3D spacer fabrics. This research can help the further study of 3D spacer fabric when applied to composites.

18

Geometric Model for Multi-axial Warp-knitted Fabric Based on NURBS

Jiang G, Gu L, Cong H L, Miao X H, Zhang A, Gao Z

Fibres & Textiles in Eastern Europe

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2014

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Vol. 22, no. 3 (105)

91--97

EN

Based on studying the constitution of yarn system and the geometric modality of relevant yarns in the multi-axial warp-knitted structure, 3D solid models of the loop yarns, insertion yarns and chopped strand mat in modern multi-axial warp-knitted fabrics were built to reflect the geometric structures of the three items by using NURBS curves and the principle of curved surfaces. Besides, OpenGL was employed to explore the corresponding 3D computer simulation system under the condition of VC++.NET, which could simulate the geometric model of multi-axial warp-knitted fabric. Meanwhile, through the selection of the unit cell of the fabric, the unit cell model of modern multi-axial warp-knitted fabric with chopped strand mat was developed and the relation between geometric parameters and process variables was deduced. The theoretical fibre volume fraction formula of modern multi-axial warp-knitted fabric with chopped strand mat was obtained as well. Furthermore, by using different specifications of fabric as samples, theoretical and experimental values of the fibre volume fraction were compared. The results revealed that there was good agreement between the theoretical and experimental values, which proved that the model was scientific and practical.

PL

Na podstawie badań struktury systemu przędz i geometrycznej modalności odpowiednich przędz w wieloosiowej dzianej strukturze osnowowej opracowano modele brył 3D przędz pętli, przędz wprowadzanych i struktur z włókien odcinkowych we współczesnych wieloosiowych dzianinach osnowowych w celu zobrazowania ich geometrycznych struktur dzięki zastosowaniu krzywych NURBS i reguł dotyczących zakrzywionych powierzchni. Oprócz tego zastosowano program OpenGL dla zbadania systemu symulacji komputerowej 3D przy warunkach VC++.NET, co pozwala na symulację geometrycznego modelu wieloosiowych dzianin osnowowych. Jednocześnie dzięki selekcji komórki podstawowej dzianiny opracowano model takiej komórki podstawowej dla konfiguracji wcześniej opisanej. Określono również zależności pomiędzy parametrami geometrycznymi a zmiennymi procesowymi. Uzyskano teoretyczną objętość włókien, następnie korzystając ze specyfikacji różnego rodzaju próbek określono zależności pomiędzy teoretycznymi i eksperymentalnymi wartościami objętości poszczególnych frakcji włókien. Wyniki wykazały, że istnieje zgodność pomiędzy teoretycznymi i eksperymentalnymi wartościami, co oznacza, że opracowany model jest naukowo uzasadniony i możliwy do stosowania w praktyce.

19

Experimental Investigation on the Stab Resistance of Warp Knitted Fabrics

Miao X, Jiang G, Kong X, Zhao S

Fibres & Textiles in Eastern Europe

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2014

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Vol. 22, no. 5 (107)

65--70

EN

The stab resistance of two guide bar warp knitted fabric made from ultra-high molecular weight polyethylene was characterised by a maximum load, and energy at the maximum load and load versus displacement curves under quasi-static test conditions are presented. Penetration angles and side were designed. Samples with different lapping, densities and layers were tested, with a woven fabric used as the original reference. The results showed that warp knitted fabric with a moderate density and longer underlaps on the front guide bar performed better. The penetration angle and side have no observable influence on warp knitted fabrics’ stab resistance. Furthermore the performance of warp knitted fabrics during a knife penetration shows the difference from woven fabric in the damage process.

PL

W artykule stwierdzono, że odporność na przebicie specjalnych dzianin osnowowych wykonanych z włókien polietylenowych o ultra wysokim ciężarze cząsteczkowym można charakteryzować poprzez maksymalne obciążenie przy przebiciu, energię w chwili maksymalnego obciążenia i krzywymi obciążenia w funkcji przemieszczenia w warunkach testowych quasi statycznych. Między innymi określono kąty penetracji . Przygotowano próbki o różnej strukturze, masie liniowej i ilości warstw. Wyniki porównywano w stosunku do wyników uzyskanych dla tkaniny. Wyniki wskazują, że dzianiny osnowowe o średniej masie liniowej i dłuższych łącznikach oczek są bardziej odporne na przebicie. Natomiast nie stwierdzono wyraźnego wpływu kąta przebicia. Ogólnie stwierdzono wyraźną różnicę zachowania się dzianin w stosunku do tkanin przy penetracji nożem.

20

Climbing Robot Modelling Based on Grab Claws

Xu F., Jiang G.

Przegląd Elektrotechniczny

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2013

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R. 89, nr 3b

182--187

EN

Though the wall-climbing robots have be used extensively, however, no effective adhesion system has been designed for robots deployed in high-altitude, rough concrete buildings that are subjected to large wind loads and vibrations. Therefore, an initial design of a wall-climbing robot based on grab claw is presented and a climbing model is proposed in the paper. The mathematical model is established to reflect the relations between sharp hook and the micro-protuberance on the rough wall surface The stress on the hook-like claws is analyzed under three different conditions, so the steady grasping condition of the hook-like claws is obtained. Simulation results are carried out which demonstrates the stability of the grasping. Finally, the system outline and field implement scheme are presented.

PL

W artykule przedstawiono projekt wspinającego się robota, opartego na chwytaku w postaci pazura. Zaproponowano także matematyczny model wspinania, pozwalający określić wpływ mikro-fałd na powierzchni pionowej na możliwość chwytania hakiem. Przeanalizowano możliwości obciążenia haka w trzech różnych warunkach pracy. Przeprowadzono badania symulacyjne i eksperymentalne w celu weryfikacji modelu.