CN103134799A - Testing device and method for fabric one-way drape performance - Google Patents
Testing device and method for fabric one-way drape performance Download PDFInfo
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- CN103134799A CN103134799A CN2013100165334A CN201310016533A CN103134799A CN 103134799 A CN103134799 A CN 103134799A CN 2013100165334 A CN2013100165334 A CN 2013100165334A CN 201310016533 A CN201310016533 A CN 201310016533A CN 103134799 A CN103134799 A CN 103134799A
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Abstract
The invention discloses a device and a method for testing fabric one-way drape performance. The device for testing the fabric one-way drape performance comprises a box body, the box body is a cube in shape, a light source is installed on the inner wall of the top of the box body, a controllable fan is installed on one inner wall of the box body, two longitudinal conducting rods are respectively installed on two side walls which are adjacent with the inner wall, the longitudinal conducting rod is matched with a longitudinal swing support in a sliding mode, the upper portions of longitudinal swing blocks on two sides are respectively connected with a top image capturing device fixing support, the lower portion of one longitudinal swing support is connected with a lateral image capturing device fixing support, guiding rails is connected between the longitudinal swing blocks on the two sides, the guiding rails are matched with fabric fixing rods in a sliding mode, the fabric fixing rods are used for hanging a fabric sample to be tested, and the top image capturing device fixing support and the lateral image capturing device fixing support are respectively fixed with one or a plurality of image capturing devices. The device for testing the fabric one-way drape performance has the technical effects of strong index pertinence and various evaluating angles, and the testing method is close to real stress features of the fabric and the like.
Description
Technical field
The invention belongs to the yarn fabric technical field of measurement and test, particularly proving installation and the method for the unidirectional draping property of a kind of fabric.
Background technology
Drapability is the reflection to draping quality and the draping shape of fabric, refers to that fabric naturally droops the ability that forms curved surface under Gravitative Loads, have material impact to the fabric visual sense of beauty.Therefore, be a very important ingredient of Fabric Style to the evaluation of fabric fall.
Traditional Testing method of fabric drape is the umbellate form method, and its ultimate principle is that the fabric with certain area is placed on disk, obtains the projected image that dangles of fabric under the irradiation of light source, determines suspended coefficient by the ratio that calculates projected area and disk area.This method of testing is simple to operate, good reflection can be arranged the overhang of fabric three-dimensional, obtained general application, and the standard that becomes fabric static drape test is promoted (test method the 9th part of ISO09073-9:2008 textile non-weaving cloth: comprise the drapability mensuration of selecting suspended coefficient: the mensuration of GB/T23329-2009 textile fabric drapability).
at present, on market, the instrument of test fabric drapability mainly contains: the CUSICK drapeometer that Britain Xi Lai company limited (SDL) makes, the fabric Pendant meter that research institute (ITF) produces is placed by France, Japan's Daiei science essence instrument make YD-100 type fabric fall test instrument, Wenzhou District of Zhejiang Province YG811 type fabric drapeometer, the YSYW-602 type cloud level instrument of University Of Suzhou, test philosophy and the method for above-mentioned these testers that dangle are basic identical, it is all the overhanging feature of evaluating fabric according to projected area and overhang by fabric being placed on disk, during test, all directions of fabric all participate in estimating, the stressed perpendicular direction of fabric is in the fabric plane, test result is the comprehensive of footpath broadwise, this method of testing is more suitable for the form of tablecloth.Yet, in actual the use, it is warp or the latitude single direction that is parallel to the fabric plane that most of fabric is subjected to force direction, for warp-wise or the broadwise overhang of estimating better actual fabric, the present invention proposes a kind of proving installation and method of the new unidirectional drapability of fabric, the deficiency that it has made up traditional umbrella shape method makes the index of estimating fabric fall more near the real use state of most of fabrics.
Summary of the invention
Measure the coarse problem of the unidirectional draping property of fabric for solving existing testing tool, the invention provides proving installation and the method for the unidirectional draping property of a kind of fabric.The present invention reflects the unidirectional overhanging feature of fabric from a plurality of angles, and relatively traditional umbrella shape method can reflect exactly that more single load bearing is main fabric overhang.
The present invention takes following technical scheme: the proving installation of the unidirectional draping property of a kind of fabric, comprise casing, and casing is Fang Tizhuan, and the top inner wall of casing is equipped with light source; The inwall of casing is equipped with controlled fan, and a vertical sliver is respectively installed on the top, two side that inwall is adjacent therewith, vertically the sliver longitudinal oscillation slide block that is slidably matched; The top of both sides longitudinal oscillation slide block is connected with top image capture device fixed support respectively, and wherein the bottom of a side longitudinal oscillation slide block is connected with the image capture device fixed support; Connection guide rail between the longitudinal oscillation slide block of both sides, the guide rail fabric fixed strip that is slidably matched, the fabric fixed strip is used for hanging fabric sample to be measured; Top image capture device fixed support, sidepiece image capture device fixed support fixedly mount respectively one or several image capture devices.
Preferably, bottom half is installed an equal tabula rasa.
Preferably, vertically the xsect of sliver is spill, and the xsect of described longitudinal oscillation slide block is spill.
Preferably, the longitudinal oscillation slide block is driven by the orthoscopic motor and can move along sliver.
Preferably, guide rail adopts spur rack, spur rack engagement fabric fixed strip, and the fabric fixed strip is driven by the orthoscopic motor and can move along spur rack.
Preferably, sidepiece image capture device fixed support fixed installation tray rack is put described image capture device, and by stationary fixture, image capture device is fixed on tray rack on tray rack.
The method of testing of the unidirectional draping property of a kind of fabric of the present invention, it adopts the proving installation of the unidirectional draping property of aforesaid fabric, and carries out as follows:
One, fabric sample is held on the fabric fixed strip, the fabric sample upper end is fixed, and the lower end naturally droops under Action of Gravity Field;
Two, the fabric fixed strip can be done horizontal and vertical swing, synchronously drives the fabric sample motion, to detect the dynamic property of fabric sample;
Three, start controlled fan, be used for measuring the performance of waving under the effect of sample wind-engaging power;
Four, by the one or more image collecting devices of different angles around fabric sample, gather the form of fabric sample under static and different stresses and obtain the image that dangles;
Five, the static state of fabric sample, dynamic drapability comprise draping quality and draping shape and the curvature of space distortion equal angles of sample, the Static and dynamic that the extracts fabric sample characteristic parameter that dangles, after analyzing the static state, dynamic drapability indices parameter of fabric sample, provide the test result of the unidirectional draping property of this fabric sample.
Drapability test index (referring to Fig. 4,5):
1, Static State Index:
1) draping quality:
Sample folding width L
1Necessarily, measure the sample width L that dangles
2: the lower hanging vertical degree of expression sample.
Work as L
2Equal L
0The time, F=0%, sample is stiffening
Work as L
2Equal L
1The time, F=100%, sample is soft, and 100% dangles;
The form performance of 2) dangling:
Well-balanced degree D kilsyth basalt shows.Referring to Fig. 6.
Crest height:
If peak height is simply according to the distance expression of summit to the peak base, in Fig. 6 1., 2. two crest heights are basic identical, but most of summits are different to the height of peak valley in the reality test, and therefore define peak height and be: a summit represents peak height h to the distance between the average height of adjacent two peak valleys.
Peak width is: the width w that 1/2 place's peak height goes out.Referring to Fig. 7.
(1) average peak height, peak height irregularity coefficient H:
(2) average peak width, peak width irregularity coefficient W:
(3) the well-balanced degree D=(1-H) (1-W) 100% that dangles
The peak height irregularity has reflected the depth of the warpage that dangles, and the peak width irregularity has reflected the very thin degree of draping shape.Well-balanced degree is less, illustrates that the fabric draping shape is poorer; Otherwise well-balanced degree is larger, illustrates that the fabric draping shape is more attractive in appearance.
2, dynamic indicator:
1) sample bar swing speed and move distance are certain:
With the amplitude of fluctuation of sample and 2 index expressions of lag angle of following: referring to Fig. 8,
Amplitude of fluctuation: reflection sample dynamic deformation ability.
Swing drag angle: when referring to the motion of sample bar, drag angle or retardation time during the sample accompany movement, can detect by dynamic video image.The active degree of reflection sample deformation.
2) the sample bar is done and is swung, and speed and move distance are certain:
With the amplitude of sample double swerve and 2 index expressions of lag angle of following:
Shaking amplitude: reflection sample dynamic deformation ability
Rock drag angle: the active degree of reflection sample deformation
Referring to Fig. 9.
1, suspended coefficient (F): 0～100%, be the index of reflection fabric drape degree, suspended coefficient greatly drapability is good.
2, active rate (LP): 0～100%, reflected the dynamic drapability of fabric, the active larger expression fabric fall of rate is better.
3, the curved surface ripple number (N) that dangles, in general, ripple number some more U.S.s.
4, aesthetic coefficient (Aest) combines the indexs such as suspended coefficient, ripple number, projection profilogram, and the larger expression fabric of the aesthetic coefficient curved surface that dangles is more beautiful.
That the curved surface lines relax is smooth, ripple without dead angle, form symmetrically, be reflected on experiment parameter be the ripple number many, vivaciously rate and aesthetic coefficient large.
Beneficial effect of the present invention:
1, index is with strong points
The present invention is mainly used in the draping property of test fabric fabric under Unidirectional acting force, and the equipment that provides is provided with multiple test pattern, sample can static, single direction swings and be subjected to test under the state such as wind-force.
2, the evaluation angle is various
Extract the characteristic parameter under the fabric sample Static and dynamic from aspects such as draping quality, draping shape, projected area and curvature of space distortion, comprising: the uneven rate of ripple, ripple is wide, ripple is high, ripple drift angle and base angle, ripple spacing, ripple area and the parameters such as average ripple spacing, bending angle, the bending angle coefficient of variation and dynamic swing frequency.
3, method of testing is more near true fabric stress characteristic
Most of fabric actual loadings are that the single load bearing that is parallel to the plane distributes; From through or the unidirectional draping property of broadwise test fabric more meet the stress characteristic of fabric; Apparatus of the present invention inside is provided with fan system and fixed support and slip bocks system can pass through real time computer control, can make sample be in fast in the regulation environment and carry out revision test, reduces the impact of all kinds of errors in experimental implementation.
Description of drawings
Fig. 1 is the structural representation of the proving installation of the unidirectional draping property of fabric of the present invention.
Be denoted as in figure: 1-light source, 2-casing, the controlled fan of 3-, 4-communication data control interface and signal wire, the 5-computing machine, the equal tabula rasa of 6-, 7-fabric sample, the 8-image capture device, 9-fabric fixture, 10-teeter mechanism (orthoscopic motor), the vertical sliver of 11-, the 12-air flow sensor, 13-image capture device fixed support.
Fig. 2 is the structural representation of teeter mechanism.
Be denoted as in figure: 10-teeter mechanism, 14-fabric fixed strip, 15-guide rail (spur rack).
Fig. 3 is the structural representation of longitudinal oscillation mechanism.
Be denoted as in figure: 8-image capture device, 13-top image capture device fixed support, 16-longitudinal oscillation slide block, 17-imageing sensor stationary fixture, 18-tray rack, 19-sidepiece image capture device fixed support.
Fig. 4 is size before sample holder.
Fig. 5 is size after sample holder.
Fig. 6 is the perspective view of direction.
Fig. 7 is the expression figure about peak height, peak width.
Fig. 8 is dynamic swing test schematic diagram.
Fig. 9 is teeter test schematic diagram.
Figure 10 is dimensional drawing before sample holder.
Figure 11 is dimensional drawing after sample holder.
Figure 12 is dynamic swing test schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the principle of the invention and preferred embodiment are elaborated.
As Figure 1-3, the proving installation of the unidirectional draping property of the present embodiment fabric comprises casing 2, and casing 2 is rectangular-shaped, the present embodiment definition: the length direction along casing is laterally, and Width is that vertically short transverse is vertical.The top inner wall of casing 2 is equipped with light source 1 and air flow sensor 12, and the bottom of casing 2 is equipped with the equal tabula rasa 6 of one (whole) piece.
One inwall of casing 2 is equipped with several controlled fans 3, and a vertical sliver 11 is respectively installed on the top, two side that inwall is adjacent therewith, and vertically the xsect of sliver 11 is spill, its outer spill longitudinal oscillation slide block 16 that is slidably matched.Longitudinal oscillation slide block 16 can move along sliver 11 under the effect of orthoscopic motor (orthoscopic motor not shown in the figures).
The top of both sides longitudinal oscillation slide block 16 is connected with the two ends of top image capture device fixed support 13 respectively, and wherein the side bottom of vertically putting slide block 16 is connected with sidepiece image capture device fixed support 19.Connection guide rail 15 between the longitudinal oscillation slide block 16 of both sides, the guide rail 15 of the present embodiment adopts spur rack.Referring to Fig. 2, spur rack 15 engagement fabric fixed strips 14, fabric fixed strip 14 adopts the orthoscopic motor by the teeter 10(of mechanism the present embodiment) drive, fabric fixed strip 14 hangs fabric sample 7 to be measured, and by fabric fixture 9, it is clamped in fabric fixed strip 14.Orthoscopic motor 10 drives fabric fixed strips 14 and moves along spur rack 15, synchronously drive fixture 9 and fabric sample 7 along guide rail 15 do the teeter campaign.
Top image capture device fixed support 13, sidepiece image capture device fixed support 19 fixedly mount respectively several image capture devices 8, and the image capture device 8 of the present embodiment adopts imageing sensor.Referring to Fig. 3, sidepiece image capture device fixed support 19 is as follows with the assembly relation of image capture device 8: sidepiece image capture device fixed support 19 fixed installation tray racks 18, and put image capture device 8 on tray rack 18 and be fixed on tray rack 18 by stationary fixture 17.Image photographic device 8 is transferred to computing machine 5 according to the image that dangles in real time of the sample frequency of setting with fabric sample by communication data control interface and data line 4.
Above-mentioned image capture device can collect the image of fabric sample, and in the present embodiment, pattern gathers per second sampling 30 frames.
Above-mentioned controlled fan, air flow sensor and computing machine have formed the wind-force regulating system, and controlled fan can blow to fabric sample, thereby it can simulate the wave performance of actual fabric sample under different wind conditions.
Orthoscopic motor, orthoscopic motor 10, air flow sensor 12, standard sources 1 and the fan control system of image capture device 8, driving slide block 16 all link with computing machine, send control command by computing machine, after control module obtains particular command, drive the work of corresponding mechanism.Take unidirectional swing as example, when the needs longitudinal oscillation, send the longitudinal oscillation order by computing machine, after control module is received the longitudinal oscillation order, control orthoscopic motor operations longitudinally, longitudinal oscillation this moment slide block begins lengthwise movement, and image capture device and fabric to be measured are done lengthwise movement thereupon together.
In the present embodiment, be provided with one (monoblock) all tabula rasas at bottom half, the cross section projection in the time of can gathering more accurately the fabric suspension and raising sample effect, collection effect is better.
the proving installation of the unidirectional drapability of fabric of the present invention can be measured the static state of various fabric sample, longitudinal oscillation, draping quality under teeter and the effect of wind-engaging power, the indexs such as draping shape and curvature of space distortion, by image capture device according in real time the dangle image of the sample frequency of setting with fabric sample, be transferred to computing machine by data line, the draping property that computing machine is processed fabric sample by image carries out analysis-by-synthesis, and automatically extract the uneven rate of ripple, ripple is wide and high, ripple drift angle and base angle, the ripple spacing, ripple area and average ripple spacing, bending angle, the bending angle coefficient of variation, the dynamic swing frequency, the crest amplitude is the degree value all, the crest angle is the degree value all, maximum crest amplitude, the morphological feature parameters such as maximum crest angle.
The below exemplifies three kinds of tests of the present invention:
1, static test: an end of fabric sample to be measured is suspended on the fabric fixed strip by the fabric fixture, and adjusts suitable interval, image capture device records the Static State Index data such as the bending shape, symmetry of the cross section projection of fabric and fabric.
2, single direction rocking test: by the computer control tilting mechanism, fabric sample is swung along certain single direction, record fabric in unidirectional swing process by image capture device, dynamic unidirectional draping property.
3, wind-engaging power effect test: on the basis of static test, by the computer control fan control system, be fabric sample under different wind-force effects, the elegant performance under the unidirectional suspension status of fabric sample.
Concrete operation step is as follows:
1, get the fabric sample of a slip gauge sizing according to test request, by fixture with sample holder on the fabric fixed strip, keep the upper end level to fix, the lower end keeps naturally drooping under the self gravitation effect; Open device power supply (DPS), open computing machine, the initialization condition to testing apparatus in testing software arranges, and comprising: the type of experimental repeatability number of times, mode of operation, fabric sample, the sample frequency of image photoraphing apparatus, wind speed and light-source brightness etc.
2, start testing tool, begin to monitor the overhanging feature of fabric sample, with fabric sample dangle in real time image transmitting in computing machine, testing software extracts characteristic parameter from the image that collects.Take longitudinal oscillation as example, at first, select the longitudinal oscillation test pattern in testing software, test environment, hunting period and the wind speed intensity level etc. of fabric sample are arranged; Begin test, longitudinal oscillation this moment slide block longitudinally sliver slides, drive top image capture device fixed support and sidepiece image capture device fixed support and image capture device and do longitudinal oscillation together with fabric sample, image capture device gathers the image that fabric swings, and with the Real-Time Monitoring image transmitting in computer testing software.
3, after testing software obtains image, image is optimized processing, automatically image is carried out index analysis, extract the various features parameter, testing software is according to the test result after repeated experiments repeatedly, carry out error and go to disturb and process, providing the final comprehensive suspension coefficient results of this fabric sample by calculating.
The related computing machine of the present invention and testing software thereof are prior art.
The invention also discloses the method for testing of the unidirectional draping property of a kind of fabric, it is characterized in that, fabric is under unidirectional suspension status tests, specifically comprise the following steps:
1, fabric sample is held on the fabric fixed strip, the sample upper end is fixed, and the lower end naturally droops under Action of Gravity Field; (mode of sample holder comprises stretching and suitable interval discounting mode, makes sample produce certain draping shape; )
2, the fabric fixed strip can be done horizontal and vertical swing, synchronously drives the fabric sample motion, to detect the dynamic property of fabric sample;
3, start controlled fan, be used for measuring the performance of waving under the effect of sample wind-engaging power;
4, by the one or more image collecting devices of different angles around fabric sample, gather the form of fabric sample under static and the different stresses image that namely dangles;
5, the static state of fabric sample, dynamic drapability comprise draping quality and draping shape and the curvature of space distortion equal angles of sample, the Static and dynamic that the extracts fabric sample characteristic parameter that dangles, go out the static state, dynamic drapability indices parameter of sample by Computer Analysis after, provide the test result of the unidirectional draping property of this fabric.
One, the unidirectional draping property test philosophy of fabric and method:
Fabric is subjected to the impact of self material and institutional framework under unidirectional External Force Acting, cause bendind rigidity, square proportion and the shear stress etc. of fabric to change, and shows different fabric Drapes.
The inventive method is intended to fabric and is under unidirectional suspension status, calculates the unidirectional draping property of fabric according to fabric projected length, the well-balanced degree of curved surface and dynamic state curve lag coefficient, and concrete grammar is as follows:
Referring to Figure 10,11.
If specimen length is the L width W, adjust the sample upper end to suitable interval, the draping quality of sample, uniformity coefficient and lag coefficient are respectively under the Static and dynamic condition: F
L, F
D, F
θ, the unidirectional draping property of this fabric is:
F=[（F
L+F
D+F
θ）/3]*100%
Wherein:
F
L=[(L-L
2)/(L-L
1)]*100%
L is the length of sample before adjusting, L
1For adjusting rear sample upper end length, L
2For adjusting rear sample lower end length; F
LOtherwise it is poorer to be worth larger draping property.
F
D=（1-H）（1-W
D）*100%
H is the uneven coefficient of peak height, W
DBe the uneven coefficient of peak width, h
iBe the crooked peak height in sample cross section,
The crooked peak height of sample mean, H reflects the crooked degree of depth, W
DThe very thin degree of reflection form, F
DOtherwise larger draping property is poorer.
F
θ=sinα=[L
α/W]*100%
Referring to Figure 12.
α is drag angle, L
αBe the dynamic swing speed v in regulation
0Under, the horizontal delay distance in relative upper end, sample lower end; F
θBe worth larger draping property better, on the contrary poorer.
Certainly; the present invention also can have other various embodiments; in the situation that do not deviate from invention spirit and essence thereof; those of ordinary skill in the art work as can make according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (7)
1. the proving installation of the unidirectional draping property of fabric, comprise casing, it is characterized in that: described casing is Fang Tizhuan, and the top inner wall of casing is equipped with light source; One inwall of casing is equipped with controlled fan, and a vertical sliver is respectively installed on the top, two side that inwall is adjacent therewith, vertically the sliver longitudinal oscillation slide block that is slidably matched; The top of both sides longitudinal oscillation slide block is connected with top image capture device fixed support respectively, and wherein the bottom of a side longitudinal oscillation slide block is connected with sidepiece image capture device fixed support; Connection guide rail between the longitudinal oscillation slide block of both sides, the guide rail fabric fixed strip that is slidably matched, the fabric fixed strip is used for hanging fabric sample to be measured; Top image capture device fixed support, sidepiece image capture device fixed support fixedly mount respectively one or several image capture devices.
2. the proving installation of the unidirectional draping property of fabric as claimed in claim 1, is characterized in that: bottom half installation one equal tabula rasa.
3. the proving installation of the unidirectional draping property of fabric as claimed in claim 1, it is characterized in that: the xsect of described vertical sliver is spill, and the xsect of described longitudinal oscillation slide block is spill.
4. the proving installation of the unidirectional draping property of fabric as described in claim 1 or 3 is characterized in that: described longitudinal oscillation slide block is driven and can be moved along sliver by the orthoscopic motor.
5. the proving installation of the unidirectional draping property of fabric as described in claim 1 or 3 is characterized in that: described guide rail adopts spur rack, spur rack engagement fabric fixed strip, and the fabric fixed strip is driven and can be moved along spur rack by the orthoscopic motor.
6. as the proving installation of the unidirectional draping property of the described fabric of claim 1-3 any one, it is characterized in that: described sidepiece image capture device fixed support fixed installation tray rack, put described image capture device on tray rack, and by stationary fixture, image capture device is fixed on tray rack.
7. the method for testing of the unidirectional draping property of fabric is characterized in that adopting the proving installation of the unidirectional draping property of fabric as described in claim 1-6, and carries out as follows:
One, fabric sample is held on the fabric fixed strip, the fabric sample upper end is fixed, and the fabric sample lower end naturally droops under Action of Gravity Field;
Two, the fabric fixed strip can be done horizontal and vertical swing, synchronously drives the fabric sample motion, to detect the dynamic property of fabric sample;
Three, start controlled fan, be used for measuring the performance of waving under the effect of sample wind-engaging power;
Four, by the one or more image collecting devices of different angles around fabric sample, gather the form of fabric sample under static and the different stresses image that namely dangles;
Five, the static state of fabric sample, dynamic drapability comprise draping quality and draping shape and the curvature of space distortion equal angles of sample, the Static and dynamic that the extracts fabric sample characteristic parameter that dangles, after analyzing the static state, dynamic drapability indices parameter of fabric sample, provide the test result of the unidirectional draping property of this fabric sample.
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| CN104215608A (en) * | 2014-09-23 | 2014-12-17 | 马根昌 | Fabric drapability detector |
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