Device for detecting water absorption diffusion time of fabric based on digital image

Abstract

The utility model provides equipment for detecting the water absorption diffusion time of a fabric based on a digital image. The equipment comprises a fixing structure, an acquisition camera, a light source assembly, a dripping needle head and a water pump. The traditional manual one-hand dropper and one-hand stopwatch is replaced, and a more accurate water dropping process and more accurate, reliable and high-speed water absorption diffusion time measurement can be realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of textiles, and in particular to an equipment for detecting water absorption and diffusion time of fabric based on digital image. BACKGROUND

[0002] Water absorption and diffusion is one of the key indicators for textile quality detection. Textiles with good water absorption and diffusion can quickly absorb human sweat, keep the skin dry, and improve wearing comfort.

[0003] There are various existing test methods. One is the water absorption height method, which measures the height of water diffusion along the vertical direction of the textile within a specified time through capillary action to evaluate the water absorption and diffusion capacity of the textile. For example, first prepare a textile sample, and balance the humidity in the environment, immerse one end of the sample in water, and keep it vertical. After a specified time, measure the height of water rising on the sample to evaluate the water absorption and diffusion performance of the sample. However, the test time is very long, and the operation is tedious, requiring a stable experimental environment.

[0004] Another way is to use the water drop diffusion method to measure the diffusion time and diffusion area of a fixed volume of water drop on the surface of the textile to evaluate the water absorption and diffusion performance of the textile. First, lay the textile sample on the test position, then use a dropper to drop liquid on the central test area of the sample, manually observe the diffusion time of the water drop, and record the end time of the water drop diffusion on the textile sample to evaluate the water absorption and diffusion performance of the textile.

[0005] Both of the above methods use manual judgment. When based on manual judgment, due to the subjective factors of each tester and the non-uniformity of the judgment standard, and the start time and end time of the stopwatch measurement cannot be synchronized with the time of the liquid drop into the textile and the end of the diffusion, the measurement accuracy is affected, and the error is further increased. CONTENT OF THE INVENTION

[0006] Therefore, it is necessary to provide an equipment for detecting water absorption and diffusion time of fabric based on digital image to solve the above problems.

[0007] Embodiments of the present application provide a method for detecting water absorption and diffusion time of fabric based on digital image, comprising:

[0008] Collecting a set of images of the fabric to be tested during the test to obtain a set of test images;

[0009] Performing contour detection on the set of test images and calculating the contour value of each frame of image in the set of test images;

[0010] comparing the contour value of each frame of image with the preset contour threshold value in sequence, if less than the preset contour threshold value, obtaining the end time value after water absorption diffusion is completed according to the frame image time data corresponding to the contour value of the frame image;

[0011] obtaining a water drop frame image acquisition start time value or a water pump opening time acquisition start time value at the time of water drop from the test image set;

[0012] calculating the water absorption diffusion time according to the start time value and the end time value.

[0013] In at least one embodiment of the present application, the method further comprises:

[0014] horizontally fixing the test fabric on the test area of the fabric water absorption diffusion time detection device based on digital image;

[0015] obtaining the adjusted image of the test fabric in the test area;

[0016] marking the region of interest from the adjusted image, and generating the adjusted exposure parameter according to the brightness value of the region of interest;

[0017] adjusting the exposure of the acquisition camera on the fabric water absorption diffusion time detection device based on digital image according to the adjusted exposure parameter.

[0018] In at least one embodiment of the present application, the method further comprises:

[0019] generating the adjusted image data stream from the image data stream of the test fabric in the preset time after the exposure adjustment of the acquisition camera and before the water drop test;

[0020] performing time domain filtering on the adjusted image data stream.

[0021] In at least one embodiment of the present application, the step after the time domain filtering of the adjusted image data stream comprises:

[0022] After time domain filtering, the image of the test fabric is collected by the acquisition camera, and is marked as the sample reference image before water drop.

[0023] In at least one embodiment of the present application, the method further comprises:

[0024] generating a water drop test signal to control the water pump of the fabric water absorption diffusion time detection device based on digital image to pump water, and to perform water drop test on the test fabric through the water drop needle of the fabric water absorption diffusion time detection device based on digital image.

[0025] In at least one embodiment of the present application, the method further comprises:

[0026] temporally filtering the test image set to obtain a filtered image set;

[0027] differentially comparing the filtered image set with the sample reference image to obtain a difference image;

[0028] multiplying the difference image to generate a multiplied image;

[0029] binarizing the multiplied image by a preset threshold to obtain an image greater than the threshold;

[0030] processing the image greater than the threshold by morphology to obtain a processed image;

[0031] calculating a contour area value of the processed image by contour detection.

[0032] An apparatus for detecting fabric water absorption and diffusion time based on digital images, applied in the method for detecting fabric water absorption and diffusion time based on digital images in any of the above embodiments, comprising:

[0033] a fixed structure formed with a test area;

[0034] a collection camera for shooting images of the test area;

[0035] a light source assembly fixedly connected with the collection camera and irradiating and reflecting images of the test area;

[0036] a water dropping needle with one end aligned with the test area;

[0037] a water pump connected with the water dropping needle.

[0038] In at least one embodiment of the present application, the water dropping needle is located between the light source assembly and the fixed structure.

[0039] In at least one embodiment of the present application, the light source assembly comprises:

[0040] a housing formed with a light outlet channel;

[0041] a light source member arranged in the light outlet channel, and the center position of the test area is located on the axis of the light source member;

[0042] a semi-transmissive and reflective member arranged between the light source member and the fixed structure, and the semi-transmissive and reflective member is arranged in the light outlet channel in an inclined manner;

[0043] The light emitted by the light source can be transmitted through the semi-transmissive and reflective light member or reflected by the semi-transmissive and reflective light member, irradiate to the test area, and then be reflected by the liquid in the test area to the semi-transmissive and reflective light member, and then be reflected by the semi-transmissive and reflective light member to the shooting end of the collection camera or be transmitted through the semi-transmissive and reflective light member to the shooting end of the collection camera.

[0044] In at least one embodiment of the present application, the angle between the semi-transmissive and reflective light member and the light outlet channel is 45°, and the mounting hole in communication with the light outlet channel is formed in the shell.

[0045] The shooting end of the collection camera is fixed in the mounting hole and is aligned with the semi-transmissive and reflective light member.

[0046] The device for detecting the water absorption and diffusion time of the fabric based on digital image according to the embodiment has at least the following beneficial effects:

[0047] 1. The device for detecting the water absorption and diffusion time of the fabric based on digital image provided above, by acquiring the image of the fabric to be tested collected by the collection camera during the test, and acquiring the water drop contour area by the contour detection method, then judging whether the water drop contour area reaches the preset contour threshold value, if less than the preset contour threshold value, obtaining the end time value after the water absorption and diffusion is completed according to the frame image time data corresponding to the contour value of the frame image.

[0048] Then the water drop frame image at the water drop time is acquired from the test image set to obtain the start time value, and then the water absorption and diffusion time is calculated according to the end time value and the start time value, so as to obtain the accurate water absorption and diffusion time of the fabric to be tested, avoid the inaccuracy caused by manual timing, and avoid the problem of inaccurate water absorption and diffusion time of the fabric to be tested due to subjective factors.

[0049] 2. The device for detecting the water absorption and diffusion time of the fabric based on digital image provided above, the fabric to be tested is first fixed horizontally in the test area of the fixing structure, then the system controls the water pump to pump liquid, the liquid is dropped on the fabric to be tested in the test area through the water drop needle, the light source assembly emits light to irradiate on the liquid on the fabric to be tested in the test area, and the light is captured by the collection camera after mirror reflection to obtain the image during the test, the image during the test includes the image of the fabric to be tested before the liquid drop and the image of the fabric to be tested during the liquid drop test, and the start time value and the end time value of the liquid drop are obtained by analyzing the image during the test.

[0050] The system calculates the difference between the start time value and the end time value to obtain the water absorption and diffusion time of the fabric to be tested.

[0051] The starting test time and the ending test time of the fabric to be tested are calculated through the mirror reflection of the liquid, so that the water absorption and diffusion time of the fabric can be calculated more accurately, and the accuracy of the test result is improved.

[0052] The traditional manual one-hand dropper and one-hand stopwatch can be replaced, so that the water dripping process is more accurate, and the water absorption and diffusion time measurement is more accurate and reliable and high-speed. BRIEF DESCRIPTION OF DRAWINGS

[0053] Figure 1 A flowchart of a method for detecting the water absorption and diffusion time of a fabric based on digital images;

[0054] Figure 2 A flowchart of another embodiment of a method for detecting the water absorption and diffusion time of a fabric based on digital images;

[0055] Figure 3 A structural diagram of an apparatus for detecting the water absorption and diffusion time of a fabric based on digital images;

[0056] Figure 4 A sectional view of the apparatus for detecting the water absorption and diffusion time of a fabric based on digital images in Figure 3 ;

[0057] Figure 5 A sectional view of the apparatus for detecting the water absorption and diffusion time of a fabric based on digital images in Figure 3 ;

[0058] Explanation of main element symbols

[0059] 100, an apparatus for detecting the water absorption and diffusion time of a fabric based on digital images;

[0060] 110, a fixing structure; 110a, a test area;

[0061] 120, a collection camera;

[0062] 130, a light source assembly; 131, a shell; 132, a light source; 133, a semi-transmissive and reflective light piece; 131a, a mounting hole; 131b, a light outlet channel;

[0063] 140, a water dripping needle;

[0064] 150, a water pump. DETAILED DESCRIPTION

[0065] The embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all.

[0066] It should be understood that when a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components can also be present. When a component is referred to as being "positioned on" another component, it can be directly positioned on the other component or intervening components can also be present. The terms "top", "bottom", "upper", "lower", "left", "right", "front", "rear", and the like as can be used herein are used for illustration only and are merely used for purposes of clarification in understanding the exemplary embodiments.

[0067] Some embodiments of the present application will be described in detail with reference to the drawings, where like reference numerals can be used to refer to like elements throughout. Embodiments described below and features in the embodiments can be combined with each other, without conflict.

[0068] Embodiments of the present application provide a method for detecting water absorption and diffusion time of fabric based on digital image, comprising:

[0069] S101, collecting image set of the fabric to be tested in the test process to obtain a test image set;

[0070] S102, performing contour detection on the test image set, and calculating the contour value of each frame of image in the test image set;

[0071] S103, comparing the contour value of each frame of image with the preset contour threshold value in sequence, if less than the preset contour threshold value, obtaining the end time value after water absorption and diffusion is completed according to the frame image time data corresponding to the contour value of the frame of image;

[0072] S104, obtaining the starting time value of the water drop frame image at the time of water drop or obtaining the starting time value of the water pump opening time from the test image set;

[0073] S105, calculating the water absorption and diffusion time according to the starting time value and the end time value.

[0074] Reference is made to Figures 1-2 In the present embodiment, the image of the fabric to be tested is collected by the collection camera 120 in the test process, and the water drop contour area is obtained by contour detection, and then it is judged whether the water drop contour area reaches the preset contour threshold value, if less than the preset contour threshold value, the end time value after water absorption and diffusion is completed is obtained according to the frame image time data corresponding to the contour value of the frame of image. After the calculation of the contour detection algorithm, if less than the preset contour threshold value, the water drop of the fabric to be tested presents the state of being absorbed, and the contour area of the water drop is less than the preset contour threshold value, and then when the water drop reflection area of the fabric to be tested presents the scattered point distribution, it will also be less than the preset contour threshold value, so that the water absorption and diffusion time of the fabric to be tested can be accurately calculated.

[0075] Then the water drop frame image when the water drops is obtained from the test image set, the starting time value is obtained, and then the water absorption diffusion time is calculated according to the ending time value and the starting time value, so as to obtain the accurate water absorption diffusion time of the test fabric, avoid the inaccuracy caused by manual timing and the error caused by subjective factors, and solve the problem that the water absorption diffusion time of the test fabric is inaccurate.

[0076] It should be noted that the image set of the test fabric during the test process is collected by the acquisition camera 120 to obtain the test image set, wherein the test image set is a video obtained by continuously shooting the test fabric during the test process, and the frame image of each frame is analyzed, and each frame image is provided with a time stamp.

[0077] Then the system adopts the contour detection algorithm to perform contour detection on each frame image in the test image set, and calculates the contour value of each frame image in the test image set.

[0078] The system compares the contour value of each frame image with the preset contour threshold value one by one, if it is less than the preset contour threshold value, the comparison process is ended, and the frame image time data corresponding to the preset contour threshold value is marked as the ending time value, wherein the preset contour threshold value is a manually marked contour area threshold value, since the value obtained after the contour detection algorithm is calculated is 0, 1, 0, 1, a closed region is formed according to the true value, and there may be multiple small closed regions of the test fabric, the total area of the closed region is calculated during detection, and then the total area of the closed region is compared with the preset contour threshold value, so as to judge whether the test fabric completes water absorption, thereby improving the accuracy of detection, and further obtaining the accurate water absorption diffusion time of the test fabric.

[0079] It should be further noted that in the process of obtaining the starting time value, the starting time of the water pump is obtained to obtain the time value of starting water drop, so as to perform water drop detection, but there is an interval between the starting time of the water pump, the process of delivering liquid to the water drop needle, and the time of the water drop needle dropping liquid, so that the detection result may have a small error, and the water absorption diffusion time of the test fabric can also be detected, and the time difference between the above liquid to the water pump to the water drop needle to the test fabric can be calculated to obtain the water absorption diffusion time of the test fabric.

[0080] Preferably, the starting time value is obtained by obtaining the water drop frame image when the water drops in the test image set, which can accurately judge the time when the water drop reaches the test fabric, so as to avoid the error value in the detection process, thereby improving the water absorption diffusion time of the test fabric.

[0081] The system obtains the water drop frame image when the water drop needle 140 drops water from the test image set, and obtains the starting time value according to the water drop frame image, wherein the water drop frame image is an image in which the liquid drops from the water drop needle 140 and falls on the test fabric.

[0082] Finally, the system obtains the water absorption diffusion time of the fabric to be tested according to the difference between the start time value and the end time value.

[0083] To improve the automation and robustness of the detection process.

[0084] In at least one embodiment of the present application, the method further comprises:

[0085] S201, horizontally fixing the fabric to be tested on the test area 110a of the device 100 for detecting fabric water absorption diffusion time based on digital image;

[0086] S202, obtaining an adjusted image of the fabric to be tested in the test area 110a;

[0087] S203, marking a region of interest from the adjusted image, and generating an adjusted exposure parameter according to the brightness value of the region of interest;

[0088] S204, adjusting the exposure of the acquisition camera 120 on the device 100 for detecting fabric water absorption diffusion time based on digital image according to the adjusted exposure parameter.

[0089] Please refer to Figures 1-2 In this embodiment, the tester horizontally fixes the fabric to be tested on the test area 110a of the device 100 for detecting fabric water absorption diffusion time based on digital image.

[0090] Then the system captures an adjusted image of the fabric to be tested in the test area 110a by the acquisition camera 120, wherein the adjusted image of the fabric to be tested is an image captured by the acquisition camera 120 before the test, in which the fabric to be tested is fixed on the test area 110a.

[0091] Next, the system marks a region of interest (i.e. ROI region) in the adjusted image, obtains the brightness value of the region of interest, calculates the average value of the brightness value of the region of interest to obtain an average brightness value, and adjusts the exposure time value of the acquisition camera 120 according to the average brightness value. The exposure parameter is the exposure time value.

[0092] To avoid the problem of overexposure and underexposure of the image due to the color depth of the fabric to be tested, and to improve the accuracy of the test result.

[0093] In at least one embodiment of the present application, the method further comprises:

[0094] S205, obtaining an adjusted image data stream of the fabric to be tested within a preset time after the exposure adjustment of the acquisition camera 120 and before the water drop test;

[0095] S206, temporally filter the adjusted image data stream.

[0096] Reference is made to Figures 1-2 In the embodiment, the system, after adjusting the exposure time of the acquisition camera 120, and before conducting the water drop test, captures, by the acquisition camera 120, an image data stream of the test fabric within a preset time range, and generates an adjusted image data stream, wherein the image data stream of the test fabric is a video image.

[0097] The system then continuously performs temporal filtering on the adjusted image data stream, i.e., calculates the average value of the pixel values of the same position of several continuously captured images, so as to reduce the influence of thermal noise of the sampling camera on the image, and avoid affecting the detection accuracy and the accuracy of the test result due to the image quality problem.

[0098] In at least one embodiment of the present application, the step after the temporally filtering the adjusted image data stream comprises:

[0099] S207, after the temporal filtering, capturing, by the acquisition camera 120, an image of the test fabric, and marking as a sample reference image before the water drop.

[0100] In the embodiment, after the system temporally filters the adjusted image data stream, the system controls the acquisition camera 120 to capture an image of the test fabric, and temporally filters the image of the test fabric to obtain an image of the test fabric before the water drop test (i.e., a sample reference image before the water drop).

[0101] The image of the test fabric before the water drop is used to record the surface features of the sample in the water-free state, and is used as a reference for comparison and analysis in the test process.

[0102] The image of the test fabric contains the background texture, material characteristics, and possible natural uneven areas of the sample surface.

[0103] The image after the water drop is compared with the reference image to calculate the pixel difference, which is used to extract the image change area caused by the water drop.

[0104] Through the difference, the irrelevant information such as the inherent texture and color of the sample can be filtered out, and only the influence of the water drop is retained.

[0105] By comparing the reference image, the influence range of the water drop can be accurately located, and the background noise or inherent defects of the sample are avoided to be mistaken as the change area.

[0106] In the subsequent processing such as difference enhancement and binarization, the reference image ensures that only the water drop related area is operated.

[0107] In at least one embodiment of the present application, the method further comprises:

[0108] S208, a water dripping test signal is generated to control the water pump of the device 100 for detecting fabric water absorption and diffusion time based on digital image to pump water and perform water dripping test on the fabric to be tested through the water dripping needle 140 of the device 100 for detecting fabric water absorption and diffusion time based on digital image.

[0109] In this embodiment, the system generates a water dripping test signal and sends the water dripping test signal to the water pump to control the water pump to drip water and drip water on the fabric to be tested through the water dripping needle 140 in communication with the water pump.

[0110] In at least one embodiment of the present application, the method further comprises:

[0111] S209, time domain filtering is performed on the test image set to obtain a filtered image set; the filtered image set is compared with the sample reference image by difference to obtain a difference image;

[0112] S210, the difference image is multiplied to generate a multiplied image; the multiplied image is binarized by a preset threshold to obtain an image greater than the threshold; the image greater than the threshold is processed by morphology to obtain a processed image; the processed image is calculated by contour detection to obtain a contour area value.

[0113] Please refer to Figures 1-2 In this embodiment, the system performs time domain filtering on each frame of image in the test image set to obtain a filtered image set. Then the system compares the filtered image set with the sample reference image by difference to obtain a difference image.

[0114] The system multiplies the difference image by a preset coefficient (the preset coefficient is set by human) pixel by pixel to obtain a multiplied image; the difference area in the difference image is enlarged to facilitate subsequent calculation.

[0115] The multiplied image is binarized by a preset threshold (the preset threshold is a threshold set by human), and the image greater than the threshold in the binarized image is selected as the image greater than the threshold. Then the image greater than the threshold is processed by morphology operation of "erosion" and "dilation" to obtain a processed image.

[0116] After the binarized image is processed by morphology operation, the local noise caused by small area is eliminated to facilitate subsequent contour detection processing, and the local fine difference is excluded to avoid errors in the calculation process and affect the accuracy of the calculation result.

[0117] The system divides each frame of image in the processed image into a plurality of closed contours by contour detection.

[0118] The system calculates the area of each closed contour, compares the contour value of each closed contour with a preset contour threshold value, and if the contour value is less than the preset contour threshold value, obtains an end time value after water absorption and diffusion is completed according to the frame image time data corresponding to the contour value of the frame image.

[0119] Then, a water drop frame image at the time of water drop is obtained from the test image set to obtain a start time value, and then the water absorption and diffusion time is calculated according to the end time value and the start time value, so as to obtain an accurate water absorption and diffusion time of the test fabric, avoid inaccurate water absorption and diffusion time of the test fabric caused by manual timing and subjective judgment error, and solve the problem of inaccurate water absorption and diffusion time of the test fabric.

[0120] The system has improved robustness and accuracy during testing.

[0121] A device 100 for detecting water absorption and diffusion time of a fabric based on digital images is applied to the method for detecting water absorption and diffusion time of a fabric based on digital images in any of the above embodiments, and comprises:

[0122] A fixing structure 110 is formed with a test area 110a;

[0123] A collection camera 120 is used to shoot images of the test area 110a;

[0124] A light source assembly 130 is fixedly connected with the collection camera 120 and irradiates and reflects images of the test area 110a;

[0125] A water drop needle 140 is aligned at one end with the test area 110a;

[0126] A water pump is connected to the water drop needle 140.

[0127] Please refer to Figures 1-5 In this embodiment, first, the test fabric is horizontally fixed on the test area 110a of the fixing structure 110, then the system controls the water pump to pump liquid, the liquid drops on the test fabric in the test area 110a through the water drop needle 140, the light source assembly 130 emits light to irradiate the liquid on the test fabric in the test area 110a, and the reflected light is captured by the collection camera 120 to obtain images during the test process, which includes images of the test fabric before water drop and images of the test fabric during the water drop test, and the start time value and the end time value of water drop are obtained by analyzing the images during the test process.

[0128] The system calculates the difference between the start time value and the end time value to obtain the water absorption and diffusion time of the test fabric.

[0129] The start test time and the end test time of the fabric to be tested are calculated by the mirror reflection of the liquid, so that the water absorption and diffusion time of the fabric can be calculated more accurately, and the accuracy of the test result is improved.

[0130] The traditional manual one-hand dropper and one-hand stopwatch can be replaced, so that the water dripping process is more accurate, and the water absorption and diffusion time measurement is more accurate, reliable and high-speed.

[0131] When the water droplets fall on the surface of the fabric, they will form water droplets or water film on the surface before being absorbed. In this case, the water will exhibit the characteristics of mirror reflection. When the water is completely absorbed into the fabric, the mirror reflection phenomenon disappears. By using digital image method, the water absorption and diffusion time of the fabric from contacting water to completely absorbing water can be measured automatically and accurately.

[0132] It should be noted that the fixing structure 110 includes a circular table, and the edge of the circular table is upwardly protruding to form a convex ring, and the test area 110a is formed inside the convex ring. The fixing structure 110 further includes a clamp which is sleeved outside the convex ring. When fixing the fabric to be tested, the edge of the fabric to be tested is placed between the clamp and the convex ring, and the fabric to be tested is placed horizontally on the convex ring, and the clamp is locked to fix the edge of the fabric to be tested between the convex ring and the clamp, so that the test position of the fabric to be tested is aligned with the test area 110a.

[0133] The acquisition camera 120 is an industrial camera. The water dripping needle 140 can be replaced by a needle with different diameters according to the needs of the test, so as to accurately control the liquid output of the liquid. The water pump is a liquid pump. By controlling the output of the water pump, the water output of the water dripping needle 140 is controlled, so as to accurately control different liquid outputs according to different test requirements.

[0134] In at least one embodiment of the present application, the water dripping needle 140 is located between the light source assembly 130 and the fixing structure 110.

[0135] In at least one embodiment of the present application, the light source assembly 130 includes:

[0136] The housing 131 is formed with a light outlet channel 131b;

[0137] The light source piece 132 is arranged in the light outlet channel 131b, and the center position of the test area 110a is located on the axis of the light source piece 132;

[0138] The semi-transmissive and reflective piece 133 is arranged between the light source piece 132 and the fixing structure 110, and the semi-transmissive and reflective piece 133 is arranged obliquely in the light outlet channel 131b;

[0139] The light emitted by the light source 132 can pass through the semi-transmissive and reflective part 133 or be reflected by the semi-transmissive and reflective part 133, irradiate to the test area 110a, and be reflected by the liquid in the test area 110a to the semi-transmissive and reflective part 133, and then be reflected by the semi-transmissive and reflective part 133 to the shooting end of the collection camera 120 or pass through the semi-transmissive and reflective part 133 to the shooting end of the collection camera 120.

[0140] Please refer to Figures 1-5 In the embodiment, the water dripping needle 140 is located between the light source assembly 130 and the fixed structure 110, so that the light irradiated by the light source assembly 130 can directly act on the water droplet, so as to accurately determine the time when the liquid is completely absorbed into the fabric.

[0141] In the embodiment, before the water dripping, the light irradiated by the light source 132 passes through the semi-transmissive and reflective part 133 to the fabric to be tested, and due to the reflection (different colors of different fabrics will reflect light of corresponding colors), the reflected light is reflected by the semi-transmissive and reflective part 133 to the shooting end of the collection camera 120, and the system adjusts the exposure value of the collection camera 120 by analyzing the reflected light pattern photographed by the collection camera 120.

[0142] Meanwhile, the sample reference image is photographed according to the above method.

[0143] After the water dripping, the light irradiated by the light source 132 passes through the light outlet channel 131b to the semi-transmissive and reflective part 133, and the light passes through the semi-transmissive and reflective part 133 to the fabric to be tested. After the light reaches the water droplet, the water droplet will reflect the light, so that the reflected light is reflected by the semi-transmissive and reflective part 133 to the shooting end of the collection camera 120, and the system obtains the fabric image set by analyzing the reflected light pattern photographed by the collection camera 120, and determines the end time by the fabric image set.

[0144] The device 100 based on digital image detection of fabric water absorption and diffusion time can accurately calculate the water absorption and diffusion time of the fabric to be tested in the test process, so as to improve the accuracy of the test result.

[0145] It should be noted that the shell 131 is a rectangular shell 131 with one side inwardly recessed, the shell 131 is arranged towards the fixed structure 110, and the shell 131 is located above the fixed structure 110. The light source 132 is a device for emitting light, such as a lamp bead. The semi-transmissive and reflective part 133 is a semi-transmissive and reflective mirror, which transmits light on one side and reflects light on the other side. The light-transmitting side is arranged close to the light source 132, and the light-reflecting side is arranged close to the fixed structure 110.

[0146] In other embodiments, the light source 132 can be arranged in the test area 110a, such as directly below, beside, etc. of the fabric to be tested, to provide light, through which the image can be determined by means of specular reflection, and provide image reference for the test result, facilitating subsequent test result determination, including but not limited to the above arrangement.

[0147] It should be noted that when the water droplet falls on the surface of the fabric to be tested, it will present a spherical, hemispherical, flat arc, and water film state before the water droplet is completely absorbed.

[0148] Before the liquid is completely absorbed, these states will have local positions that produce specular reflection of light vertically illuminated from above. The specular reflected light is guided into the collection camera by the semi-transmissive and reflective member on the coaxial light source and is captured. The computer connected to the collection camera, through the computer software, continuously collects and analyzes the image, and then detects and measures the water absorption and diffusion time of the fabric.

[0149] It should be further noted that when the light source and the collection camera are arranged, the light source and the collection camera can be arranged coaxially, i.e. the light outlet of the light source is aligned with the test area and the shooting end of the collection camera, and then the semi-transmissive and reflective member is arranged between the test area and the collection camera.

[0150] The light emitted by the light source is reflected by the semi-transmissive and reflective member, and when the reflected light is reflected by the water droplet on the fabric to be tested in the test area, the reflected light is transmitted through the semi-transmissive and reflective member to the shooting end of the collection camera, and the collection camera captures the image transmitted through the semi-transmissive and reflective member.

[0151] In at least one embodiment of the present application, the angle between the semi-transmissive and reflective member 133 and the light outlet channel 131b is 45°, and the housing 131 is provided with a mounting hole 131a communicating with the light outlet channel 131b;

[0152] The shooting end of the collection camera 120 is fixed in the mounting hole 131a and is aligned with the semi-transmissive and reflective member 133.

[0153] Please refer to Figures 1-5 In this embodiment, by setting the angle between the semi-transmissive and reflective member 133 and the light outlet channel 131b to 45 degrees, the collection camera 120 can better capture the image of the fabric to be tested and the image of the test position of the fabric to be tested during the test.

[0154] Secondly, the light source 132, the light outlet channel 131b and the test area 110a are coaxially arranged, so that the light rays can be focused, the whole process of the fabric absorbing water during the test can be more accurately photographed, and the fabric water absorption time can be more accurately calculated, and the test result accuracy is improved.

[0155] The mounting hole 131a is a through hole, and the mounting hole 131a is a circular hole. The reflected light rays can be captured by the collection camera 120, thereby forming a reflected fabric image.

[0156] It should be noted that the semi-transparent reflective light piece can be adaptively adjusted according to the setting angle and position of the light source and the collection camera to meet the shooting needs.

[0157] The above is only an embodiment of the present application, and it should be pointed out that those skilled in the art can make improvements without departing from the creative concept of the present application, but these all belong to the protection scope of the present application.

Claims

1. A device for detecting the water absorption and diffusion time of fabrics based on digital imaging, characterized in that, include: A fixed structure forms a test area; A camera is used to capture images of the test area; A light source assembly is fixedly connected to the acquisition camera and illuminates and reflects images onto the test area; A dripping needle, one end of which is aligned with the test area; A water pump is connected to the drip needle; The light source assembly includes: The shell has a light-emitting channel; A light source is disposed within the light emission channel, and the center of the test area is located on the axis of the light source. A semi-transparent reflector is disposed between the light source and the fixed structure, and the semi-transparent reflector is inclinedly disposed within the light emission channel; The light emitted by the light source can pass through the semi-transparent reflector or be reflected by the semi-transparent reflector to illuminate the test area, and be reflected by the liquid in the test area to the semi-transparent reflector, and then reflected by the semi-transparent reflector to the shooting end of the acquisition camera or pass through the semi-transparent reflector to the shooting end of the acquisition camera.

2. The device for detecting fabric water absorption and diffusion time based on digital imaging according to claim 1, characterized in that, The dripping needle is located between the light source assembly and the fixed structure.

3. The device for detecting fabric water absorption and diffusion time based on digital imaging according to claim 1, characterized in that, The semi-transparent reflector and the light-emitting channel form an angle of 45°, and the housing has a mounting hole that communicates with the light-emitting channel. The camera's shooting end is fixed inside the mounting hole and aligned with the semi-transparent reflector.

Images