CN1825096A - Image testing method for fabric dynamic and static drapability and testing apparatus thereof - Google Patents
Image testing method for fabric dynamic and static drapability and testing apparatus thereof Download PDFInfo
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Abstract
The invention relates to an image testing method for fabric dynamic and static drapability. The process includes the following steps: laying the sample on level plane formed by tray and light equal board, covering small disc, the lift structure lifting sample and tray, and stopping at the highest location, the sample is in overhang state; CCD camera sampling the image information into computer and display on screen, the overhang testing software distilling static index; if needing to take dynamic overhang image testing, rotating the sample and imaging, distilling dynamic overhang index; finally, output the result. The device is made up of tray, light equal board, lifting structure, rotating structure, CCD camera and computer. The relative software is stored in the computer. The invention has reliable structure and has high testing accuracy.
Description
Technical field
The invention belongs to the image measurement method and the proving installation thereof in textile garment surveying instrument field, particularly a kind of fabric dynamic and static drapability.
Background technology
Fabric fall can be meant the performance of lining sagging naturally formation curved surface under the deadweight effect, it is an important quality of drapability lining, also be a key factor of decision lining visual sense of beauty, can it is concerning that fabric is actual form the surface modeling of grace and good property next to the shin when using.As being mainly used in the textile of taking, must have good drapability, fabric especially for curtain, tent, skirting, requirement to drapability is just higher, it not only requires fabric to have good static drape, and require the formed curved surface of fabric to have good undulatory property and activity, so that fabric presents smooth, smooth, graceful, active surface modeling under motion state.Draping property directly has influence on the class and the price of lining, and generally speaking, high-grade fabric has good drapability.The quality of drapability directly has influence on whether selecting materials of designer.
Fabric fall can evaluation method have two kinds: the one, subjective estimate method, each evaluation personnel judges fabric fall, has easy, the characteristics fast of evaluation.But, the result of subjective assessment often because of the people, vary in different localities, limitation is very big.Simultaneously, do not have strict corresponding single valued relation between fabric fall energy and the evaluation result, subjective assessment lacks theoretical direction and retraces surely and states in addition, and the data comparability is poor, very difficultly combines to improve the performance of fabric with production.The 2nd, instrument measuring method utilizes Pendant meter to measure the suspended coefficient of fabric or the draping property that other a few indexs are described fabric, eliminates the influence of subjective factor to fabric fall energy evaluation result.Instrument measuring method generally adopts umbrella formula method, promptly be that circular fabric with certain area is pressed on the disk, the irradiation parallel rays obtains the fabric perspective view that dangles on projection screen, calculate the projected area of sample hanging portion and the percent of the ratio of its original area, be suspended coefficient, usually suspended coefficient is more little, and the expression drapability is good more.
Domestic and international at present surveying instrument about the fabric fall energy, generally has the suspended coefficient index that reflects the degree of dangling, weight method or photoelectric method are mostly adopted in the calculating of suspended coefficient, but all there is certain problem, operation stepss such as weight method needs manual tracing, paper-cut, weigh, efficient is low, and personal error is big; May produce bigger error during types of fabrics such as photoelectric method is slim because of the transmittance different measuring, mesh and stamp.There are the problems referred to above in domestic existing YG811 fabric fall analyzer, and in addition, sample is placed and adopted four feets to strut sample, and is big to the influence of sample draping shape wave number.The domestic dynamic Pendant meter of LFY-21A type fabric in addition, scanning support when sample turns round by the sample maximum radius to parallel move the panoramic table maximum radius, constituted Photoelectric Detection the homalographic of sample projection has been cut apart scanning, detect and adopt sample bench (6 rev/mins) revolution and two kinds of test modes of quick (24 rev/mins) revolution at a slow speed, the static drape and the dynamic active style that reflect fabric respectively, static test requires not conform to the regulation of " FZ/T 01045-1996 fabric fall test method " standard, speed of gyration is subjected to cutting apart the restriction of sweep frequency, the same with the YG811 in addition influence that can be subjected to the transmittance factor, measuring error is big, can not be satisfactory to the evaluation effect of fabric fall.The M213 type fabric Pendant meter of the YD-100 type fabric fall test instrument of external existing Japan and France all adopts the photoelectric type measuring principle, all has above-mentioned same problem, and part sample measurement deviation is bigger.In a word, current domestic and international Pendant meter is subjected to the light factor affecting owing to count at planimeter, can not effectively measure the sample of types such as bigger frivolous, the pattern of quantity in taking, hole, do not consider the influence of sample laying method to draping shape, practical application effect is relatively poor.
Summary of the invention
The image measurement method and the proving installation thereof that the purpose of this invention is to provide a kind of fabric dynamic and static drapability mainly solve above-mentioned technological deficiency described in the prior art.
The technical scheme of technical solution problem of the present invention is as follows:
A kind of image measurement method of fabric dynamic and static drapability is characterized in that: realize as follows:
At first, open the chamber door of test box, sample is lain on the horizontal plane of pallet and even tabula rasa formation, cover roundel, close chamber door;
By elevating mechanism sample and pallet are steadily risen together again, the sample deadweight is sagging, when pallet and sample rise to the extreme higher position, stops to rise;
Enter computing machine by CCD camera collection sample draping shape image information, and be presented on the screen, the drapability testing software of calculator memory storage extracts the static drape index from image information, and it comprises static drape coefficient, wave number, crest amplitude uniformity coefficient, crest angle uniformity coefficient and maximum crest amplitude, minimum crest amplitude, maximum crest angle, minimum crest angle;
When needs carry out the image measurement of fabric dynamic drape, by rotating mechanism sample and pallet are rotated, by image acquisition and data processing, extract the dynamic drapability index;
At last, show and the printer prints test result by display.
A kind of proving installation of realizing the image measurement method of aforesaid fabric dynamic and static drapability is characterized in that: it comprises by pallet, even tabula rasa, roundel, elevating mechanism, rotating mechanism, CCD the camera test box of forming and the computing machine, display, the printer that are connected with the data output end of test box; The store memory of this computing machine has Flame Image Process and calculates the drapability testing software of drapability index.
The lifting stepper motor of this elevating mechanism drives sample by belt and pallet moves up and down.
Should adopt cold light panel as light source by even tabula rasa, and be placed on below the poly (methyl methacrylate) plate, there be hole at the poly (methyl methacrylate) plate center, and pallet descends so far in the hole, forms the plane of a level with even tabula rasa, and sample can be divided and be placed on this surface level, as its original state.
The rotating stepper motor of this rotating mechanism drives pallet, sample and roundel and rotates, sample presents dynamic draping shape, dynamically dangle picture signal and import computing machine of CCD camera collection sample, the drapability testing software that Flame Image Process that has in computer memory and index are calculated calculates the index of dynamically dangling.
This rotaty step motor adjustable speed is 0～200 rev/min.
The casing of this test box is made up of upper case and lower case, and upper case comprises the cover cap on chamber door with handles and the CCD camera, and lower case comprises power switch, decline button, rising button and testing button.
Advantage compared with prior art of the present invention is as follows:
1, the present invention adopts the CCD camera technique accurately to measure fabric and dangles the edge of image point to radius, area, wave number and the crest amplitude uniformity coefficient of central point and crest angle uniformity coefficient etc., radius resolution is 0.1mm, the measuring accuracy and the structure that have obviously improved the fabric sample drapability are more reliable, and failure rate greatly reduces;
2, adopt the transmission of lifting stepper motor, running steadily, control is accurately reliable, can drive effectively that sample and pallet steadily rise together and the sample deadweight is sagging, this sample laying method can reduce manually the placement sample to the influence of its draping shape test result (especially wave number or crest angle uniformity coefficient);
3, instrument adopts closed cabinet, and even tabula rasa provides the background light source of even color, can avoid the influence of ambient light power to test result, has improved instrument test result's reappearance.
4, rotating mechanism can make sample and pallet rotate together, and CCD collects the rotation status Sample Image, and the drapability testing software of calculator memory storage is to the Sample Image Treatment Analysis, for dynamic drapability provides also new means of testing.
5, instrument has been owing to designed the drapability testing software of new image-pickup method and calculator memory storage, in can Validity Test taking quantity bigger but the fabric sample of the big types such as frivolous, pattern of transmittance.
Description of drawings
Fig. 1 is the image measurement device synoptic diagram of fabric dynamic and static drapability of the present invention.
Among Fig. 1,1---sample, 2---pallet, 3---even tabula rasa, 4---roundel, 5---elevating mechanism, 6---rotating mechanism, 7---the CCD camera, 8---computing machine, 9---display, 10---printer;
Fig. 2 is a sample laying method synoptic diagram of the present invention.
Among Fig. 2,1---sample, 2---pallet, 3---even tabula rasa, 31---poly (methyl methacrylate) plate, 32---cold light panel, 5---elevating mechanism, 51---the lifting stepper motor, 52---belt, 53---lower position switch, 54---upper limit position switch, 6---rotating mechanism, 61---rotating stepper motor, 62---the rotating stepper motor base;
Fig. 3 is the casing schematic perspective view.
Among Fig. 3,11---casing, 111---upper case, 1111---chamber door, 1112---the upper cover of CCD camera, 112---lower case, 1121---power switch, 1122---the decline button, 1123---the rising button, 1124---testing button.
Fig. 4 is test macro control synoptic diagram.
Among Fig. 4,8---computing machine, 51---the lifting stepper motor, 53---lower position switch, 54---upper limit position switch, 55---the lifting pulsqe distributor, 61---rotating stepper motor, 63---rotary pulsed divider, 1122---the decline button, 11221---the decline pilot lamp, 1123---the rising button, 11231---the rising pilot lamp, 1124---testing button, 11241---the test pilot lamp.
Fig. 5 is the test philosophy synoptic diagram.
Among Fig. 5,1---sample, 4---roundel, 12---big disk, angle between α---drape edge point and initial zero line, α
c---angle between adjacent two crests, R---radius are the distance of drape edge point to central point, R
c---the crest amplitude is the difference of crest radius and roundel radius.
Embodiment
As shown in Figure 1, a kind of image measurement method and proving installation thereof of measuring fabric dynamic and static drapability provided by the invention, can measure the suspended coefficient and the draping shape index of various fabric sample, promptly try to achieve the suspended coefficient of sample by the percent of area ratio before the projection section area of sample hanging portion and its projection, the drapability testing software of storage analyzes draping shape in the computing machine 8, records morphological feature indexs such as wave number, crest amplitude uniformity coefficient, crest angle uniformity coefficient, maximum crest amplitude, maximum crest angle automatically.The method of testing of a kind of fabric dynamic and static drapability of the present invention is characterized in that realizing as follows:
Open the power switch preheating half an hour of fabric dynamic and static drapability proving installation and computing machine earlier, be ready to diameter 240mm circular specimen 1, by decline button 1122, decline pilot lamp 11221 is bright, when pallet 2 dropped to extreme lower position, lower position switch 53 was connected, and stopped to descend, decline pilot lamp 11221 goes out, and pallet 2 upper surfaces and even tabula rasa 3 upper surfaces coexist on the surface level.Open chamber door 1111, sample 1 center pit and pallet 2 central aperture, sample 1 divided be placed on pallet 2 and the even tabula rasa 3 place horizontal planes, cover roundel 4, close chamber door 1111, by rising button 1123, rising pilot lamp 11231 is bright, roundel 4, sample 1, pallet 2 and rotating mechanism 6 steadily rise together, with display 9 that computing machine 8 links to each other on the variation of sample 1 overhang in the whole uphill process of real time monitoring, when sample 1 and pallet 2 rise to the extreme higher position, upper limit position switch 54 is connected, stop to rise, rising pilot lamp 11231 goes out, test pilot lamp 11241 is bright, computing machine 8 with this time as time zero, self-clocking, through (" FZ/T 01045-1996 fabric fall test method " regulation test period is 3 minutes) after the stipulated time, test starts automatically, CCD camera 7 is gathered dangle picture signal and import computing machine 8 of samples 1, the drapability testing software of storage analyzes this picture signal in computing machine 8, records radius R and the corresponding angle [alpha] thereof of image outline each point to central point, crest amplitude R
cAnd angle α between crest
cIntegration obtains the area that dangles, area and the roundel 4 area differences of dangling obtain the static drape coefficient divided by big disk 12 and roundel 4 area difference values, obtain crest number, maximum crest amplitude, minimum crest amplitude, maximum crest angle, minimum crest angle according to angle statistical study between crest amplitude and crest, calculate the crest amplitude coefficient of variation, be crest amplitude uniformity coefficient, calculate the crest angle coefficient of variation, be crest angle uniformity coefficient, obtain 8 static drape achievement datas of sample 1 altogether, on display 9, show.Computing machine 8 output pulse signals, send into rotating stepper motor 61 by rotary pulsed divider 63, driving pallet 2, sample 1 and roundel 4 rotates, sample 1 presents dynamic draping shape, CCD camera 7 is gathered dynamically dangle picture signal and import computing machine 8 of samples 1, the drapability testing software that Flame Image Process that has at computing machine 8 store memories and index are calculated calculates dynamic suspended coefficient, and then obtains sound suspended coefficient ratio, shows on display 9 and is printed by printer 10.
As shown in Figure 2, the present invention adopts the sample sagging sample laying method of deadweight that steadily rises, lifting stepper motor 51 drives sample 1 by belt 52 and pallet 2 moves up and down, when dropping to extreme lower position, lower position switch 53 is connected, stop to descend, at this moment, sample 1 can be divided on the surface that is placed on pallet 2 and even tabula rasa 3, by the rising button, lifting stepper motor 51 rotates, belt 52 drives sample 1 and pallet 2 rises, and when rising to the extreme higher position, upper limit position switch 54 is connected, stop to rise, at this moment, sample 1 is in overhang shown in Figure 1, and this sample laying method reduces the influence of sample placement to the sample catenary configuration, owing to unified the sample laying method, improved sample testing result's reappearance.When sample 1 rises to the extreme higher position, rising pilot lamp 11231 goes out, test pilot lamp 11241 is bright, computing machine 8 with this time as time zero, self-clocking, after 3 minutes, test starts automatically through " FZ/T 01045-1996 fabric fall test method " regulation test period, and the images acquired signal is also sent into computing machine 8 and handled.In addition, computing machine 8 can be set a time series by the drapability testing software that stores in it, as 0s, 5s, 10s, 15s, ... or 0s, 10s, 20s, 30s, ..., can obtain the sample measurement result of a plurality of time points under static state, and then the time response of analytical sample drapability, suspended coefficient-time curve drawn.
As shown in Figure 2, the present invention adopts the mode of motion of sample rotation to measure dynamic drape, rotating stepper motor 61 adjustable speeds are 0～200 rev/min, various samples can present from the static drape state to approximate complete rotary expansion state under this velocity range, satisfy sample dynamic drape Testing requirement under the different rotation rates.
Signal Processing in the test macro of the present invention is controlled by the drapability testing software of computing machine 8 stored, decline button 1122 sends level signal and sends into computing machine 8, computing machine 8 output pulse signals, send into lifting stepper motor 51 by lifting pulsqe distributor 55, lifting stepper motor 51 drives sample by belt 52 and pallet descends, when dropping to extreme lower position, lower position switch 53 is connected, send signal and send into computing machine 8, computing machine 8 stops output pulse signal, and lifting stepper motor 51 stops operating.The control signal of rising button 1123 is handled similar decline button 1122.Testing button 1124 controls divide dual mode, and manual mode is after sample 1 and pallet 2 rise to the extreme higher position, and sample 1 time of repose is manually determined, presses testing button 1124 and starts test, and level signal is also sent into computing machine 8, and computing machine 8 enters test procedure; Automated manner is that sample 1 and pallet 2 rise to the extreme higher position, through behind the setting-up time, need not by testing button 1124, and computing machine 8 is tested automatically.
For guaranteeing the test result confidence level, to calibrate with big or small two disks, roundel 4 diameters are 120mm, big disk 12 diameter 240mm.Open chamber door 1111, cover roundel 4 on the pallet, close chamber door 1111, by rising button 1123, when rising to the extreme higher position, stop to rise, rising pilot lamp 11231 goes out.In the drapability testing software of computing machine 8 stored, click the button at zero point, click several times, till value is shown as " 0.0 " to zero point.Open chamber door 1111, take out roundel 4, cover big disk 12, close chamber door 1111, click the full scale button, click several times, be shown as " 100.0 " to full scale value till.Radius R and area calculate based on calibration value during measurement, can guarantee the accuracy of measurement result and each apparatus measures result's consistance.
Test macro of the present invention tested static separately dangles or dynamically dangles, also can test static and dynamic drape simultaneously, the drapability testing software of computing machine 8 stored is if set static drape test individual event, obtain 8 static drape indexs, in like manner, if set the test individual event of dynamically dangling, obtain 8 indexs of dynamically dangling, if set two of static and dynamic drape tests, obtain 8 static drape indexs and 1 sound suspended coefficient ratio, adopt multiple test mode to satisfy various test request.
Even tabula rasa 3 adopts cold light panel 32 as light source, size 350mm * 350mm, and there is diameter 80mm hole at the center.Cold light panel 32 is placed on below the poly (methyl methacrylate) plate 31, and poly (methyl methacrylate) plate 31 is consistent with cold light panel 32 sizes, and there is diameter 125mm hole at the center, thick 5mm, and pallet 2 can be put into this hole, with the plane of a level of even tabula rasa 3 formation.Even tabula rasa 3 can send light color, soft light, can improve the computer screen real-time image stabilization, increases the sharpness of images acquired simultaneously.To the evaluation of fabric dynamic and static drapability, main what consider is the dangle profile information of image of fabric.For the picture quality that guarantees to absorb, replace projection screen with even tabula rasa 3, it provides the background light source of even color, the image that CCD camera 7 collects is made of the even tabula rasa 3 of periphery light color and the fabric shading shade two parts that dangle of center dark color, color transition between fabric shade and the background is obvious, be easy to a fabric draping shape image and from background, separate, thereby obtain its profile information.
Whole instrument casing 11 is made up of upper case 111 and lower case 112, upper case 111 is provided with chamber door with handles 1111, open chamber door 1111, after putting into sample 1, close chamber door 1111, under the closed box condition, the fabric sample draping shape is carried out videographic measurment, avoid the influence of the variation of environmental light intensity to measurement result.
Being preferred embodiment of the present invention only in sum, is not to be used for limiting practical range of the present invention.Be that all equivalences of doing according to the content of the present patent application claim change and modification, all should be technology category of the present invention.
Claims (7)
1, a kind of image measurement method of fabric dynamic and static drapability is characterized in that: realize as follows:
At first, open the chamber door (1111) of test box, sample (1) is lain on the horizontal plane of pallet (2) and even tabula rasa (3) formation, cover roundel (4), close chamber door (1111);
By elevating mechanism (5) sample (1) and pallet (2) are steadily risen together again, sample (1) deadweight is sagging, when pallet (2) and sample rise to the extreme higher position, stops rising;
Gather sample draping shape image information by CCD camera (7) and enter computing machine (8), and be presented on the screen, the drapability testing software of storage extracts the static drape index from image information in the computing machine (8), and it comprises static drape coefficient, wave number, crest amplitude uniformity coefficient, crest angle uniformity coefficient and maximum crest amplitude, minimum crest amplitude, maximum crest angle, minimum crest angle;
When needs carry out the image measurement of fabric dynamic drape, by rotating mechanism (6) sample (1) and pallet (2) are rotated, by image acquisition and data processing, extract the dynamic drapability index;
At last, show and printer (10) printing test result by display (9).
2, a kind of proving installation of realizing the image measurement method of fabric dynamic and static drapability as claimed in claim 1 is characterized in that: it comprises the test box of being made up of pallet (2), even tabula rasa (3), roundel (4), elevating mechanism (5), rotating mechanism (6), CCD camera (7) and the computing machine (8) that is connected with the data output end of test box, display (9), printer (10); The store memory of this computing machine (8) has Flame Image Process and calculates the drapability testing software of drapability index.
3, the image measurement device of fabric dynamic and static drapability according to claim 2 is characterized in that: the lifting stepper motor (51) of this elevating mechanism (5) drives sample (1) by belt (52) and pallet (2) moves up and down.
4, the image measurement device of fabric dynamic and static drapability according to claim 2, it is characterized in that: this even tabula rasa (3) adopts cold light panel (32) as light source, be placed on below the poly (methyl methacrylate) plate (31), there is hole at poly (methyl methacrylate) plate (31) center, pallet (2) descends so far in the hole, with the plane of a level of even tabula rasa (3) formation, sample can be divided and be placed on this surface level, as its original state.
5, the image measurement device of fabric dynamic and static drapability according to claim 2, it is characterized in that: the rotating stepper motor (61) of this rotating mechanism (6) drives pallet (2), sample (1) and roundel (4) and rotates, sample (1) presents dynamic draping shape, CCD camera (7) is gathered dynamically dangle picture signal and import computing machine (8) of sample (1), and the drapability testing software that Flame Image Process that has at computing machine (8) store memory and index are calculated calculates the index of dynamically dangling.
6, the image measurement device of fabric dynamic and static drapability according to claim 5 is characterized in that: this rotaty step motor (61) adjustable speed is 0～200 rev/min.
7, the image measurement device of fabric dynamic and static drapability according to claim 2, it is characterized in that: the casing of this test box (11) is made up of upper case (111) and lower case (112), upper case (111) comprises the upper cover (1112) of chamber door with handles (1111) and CCD camera (7), and lower case (112) comprises power switch (1121), decline button (1122), rising button (1123) and testing button (1124).
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