Double-sided detection equipment of cloth inspecting machine and cloth inspecting machine

Abstract

The invention discloses double-sided detection equipment of a cloth inspecting machine and the cloth inspecting machine, which are applied to the technical field of cloth inspecting machines, and the equipment comprises a plurality of cloth guide rollers arranged on a rack, an upper fixing frame, a lower fixing frame, a first detection device arranged on the upper fixing frame, and a second detection device arranged on the lower fixing frame, a detection area is formed between two of the multiple cloth guide rollers, and the multiple cloth guide rollers convey cloth to be detected from the cloth inlet end of the cloth inspecting machine to the cloth outlet end of the cloth inspecting machine; the first detection device carries out cloth information acquisition on the upper side surface of the to-be-detected cloth located in the detection area in the to-be-detected cloth conveying process to obtain upper side surface cloth information; a second detection device performs cloth information acquisition on the lower side surface of the to-be-detected cloth in the detection area in the to-be-detected cloth conveying process to obtain lower side surface cloth information; the processor performs flaw detection on the to-be-detected cloth according to the upper side cloth information and the lower side cloth; the cloth detection efficiency and the detection quality can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cloth inspection machines, in particular to a double-sided detection device of a cloth inspection machine and the cloth inspection machine. BACKGROUND

[0002] With the diversification of textile application scenarios and the improvement of quality standards, traditional single-sided detection cannot meet the zero-tolerance requirement of high-end fabrics (such as medical protective clothing, automotive interiors, functional sportswear, etc.) for defects. Therefore, double-sided detection of fabrics is required. The current cloth inspection machine can only realize single-sided detection of fabrics. After single-sided detection is completed, the fabric needs to be manually turned over for secondary machine detection. Not only is the detection process tedious and inefficient, but it also easily leads to secondary pollution.

[0003] Therefore, how to improve the double-sided detection efficiency and detection quality of the cloth inspection machine has become a problem to be solved by those skilled in the art. SUMMARY

[0004] The purpose of the embodiment of the present application is to provide a double-sided detection device of a cloth inspection machine and the cloth inspection machine, which improves the double-sided detection efficiency and detection quality of the cloth inspection machine during use.

[0005] To solve the above technical problems, the embodiment of the present application provides the following technical solutions:

[0006] In one aspect, the present application provides a double-sided detection device of a cloth inspection machine, comprising: a plurality of cloth guide rollers, an upper fixing frame, a lower fixing frame, a first detection device arranged on the upper fixing frame, a second detection device arranged on the lower fixing frame, and a processor connected with the first detection device and the second detection device, wherein two of the plurality of cloth guide rollers constitute a detection area.

[0007] The plurality of cloth guide rollers are used to transmit the fabric to be detected from the cloth inlet end of the cloth inspection machine to the cloth outlet end of the cloth inspection machine.

[0008] The first detection device is used to collect fabric information of the upper side of the fabric to be detected in the detection area during the transmission of the fabric to be detected, to obtain upper side fabric information.

[0009] The second detection device is used to collect fabric information of the lower side of the fabric to be detected in the detection area during the transmission of the fabric to be detected, to obtain lower side fabric information.

[0010] The processor is used to detect defects in the fabric to be detected according to the upper side fabric information and the lower side fabric information.

[0011] In an embodiment, the first detecting device comprises a first image collector and a first light source, the first image collector is arranged on the upper fixed frame at an end away from the upper surface of the detecting area and faces the upper surface of the detecting area, and the first light source is arranged on the upper fixed frame at an end close to the upper surface of the detecting area and faces the upper surface of the detecting area.

[0012] The second detecting device comprises a second image collector and a second light source, the second image collector is arranged on the lower fixed frame at an end away from the lower surface of the detecting area and faces the lower surface of the detecting area, and the second light source is arranged on the lower fixed frame at an end close to the lower surface of the detecting area and faces the lower surface of the detecting area.

[0013] In an embodiment, the plurality of cloth guiding rollers comprises a first cloth guiding roller arranged at the cloth feeding end of the frame, a second cloth guiding roller and a third cloth guiding roller arranged at the middle region of the frame, and a fourth cloth guiding roller and a fifth cloth guiding roller arranged at the cloth discharging end of the frame, the region between the second cloth guiding roller and the third cloth guiding roller is the detecting area, so that the region of the cloth to be detected transmitted from the second cloth guiding roller to the third cloth guiding roller corresponds to the detecting area.

[0014] In an embodiment, the detecting area is a horizontal detecting area, the first image collector faces vertically downward relative to the horizontal detecting area, and the second image collector faces vertically upward relative to the horizontal detecting area.

[0015] In an embodiment, the device further comprises a swing lever mechanism, the swing lever mechanism comprises a fixed lever, a swing arm, a sixth cloth guiding roller and a seventh cloth guiding roller, wherein both ends of the fixed lever are rotatably mounted on the frame through bearings, the sixth cloth guiding roller and the seventh cloth guiding roller are arranged in parallel on the fixed lever, both ends of the sixth cloth guiding roller and the seventh cloth guiding roller are connected through corresponding swing arms respectively, and the swing lever mechanism transmits the cloth to be detected transmitted by the third cloth guiding roller to the fourth cloth guiding roller through the sixth cloth guiding roller and the seventh cloth guiding roller, and then transmits the cloth to be detected to the fifth cloth guiding roller at the cloth discharging end through the fourth cloth guiding roller to output the cloth to be detected.

[0016] In an embodiment, an encoder arranged on the upper fixed frame is further included, the encoder is used to detect the speed of the cloth to be detected transmitted on the third cloth guiding roller, and control the first image collector and the first light source to work synchronously and control the second image collector and the second light source to work synchronously.

[0017] In an embodiment, the first light source and / or the second light source is a linear array light source.

[0018] In an embodiment, the linear light source is a light source formed by a bar-shaped LED array.

[0019] In an embodiment, the bar-shaped LED array is arranged parallel to the cloth to be detected along a movement direction of the cloth to be detected.

[0020] Another aspect of the present application provides a cloth inspection machine comprising the double-side detection device of the cloth inspection machine as described above.

[0021] From the above technical solutions, it can be seen that the embodiments of the present application have the following advantages:

[0022] The double-side detection device of the cloth inspection machine provided in the embodiments of the present application comprises: a plurality of cloth guide rollers arranged on a frame, an upper fixing frame, a lower fixing frame, a first detection device arranged on the upper fixing frame, and a second detection device arranged on the lower fixing frame, wherein two of the plurality of cloth guide rollers form a detection area therebetween, and wherein: the plurality of cloth guide rollers are configured to transmit the cloth to be detected from an entry end of the cloth inspection machine to an exit end of the cloth inspection machine; the first detection device is configured to collect cloth information of an upper side of the cloth to be detected located in the detection area during transmission of the cloth to be detected, to obtain upper side cloth information; the second detection device is configured to collect cloth information of a lower side of the cloth to be detected located in the detection area during transmission of the cloth to be detected, to obtain lower side cloth information; and a processor is configured to perform defect detection on the cloth to be detected according to the upper side cloth information and the lower side cloth information.

[0023] Therefore, the double-side detection device of the cloth inspection machine in the present application is provided with the first detection device and the second detection device, and each position of the cloth to be detected passes through the detection area during transmission of the cloth to be detected by the plurality of cloth guide rollers. The first detection device and the second detection device can collect cloth information of the upper side and the lower side of the corresponding area of the cloth to be detected located in the detection area, respectively, to obtain corresponding upper side cloth information and lower side cloth information. The processor can perform defect detection by analyzing the upper side cloth information and the lower side cloth information, so as to realize automatic double-side detection of the cloth to be detected without manual reverse side detection, thereby improving the double-side detection efficiency and detection quality of the cloth inspection machine.

[0024] In addition, the present application also provides a corresponding cloth inspection machine for the double-side detection device of the cloth inspection machine, which has corresponding advantages. BRIEF DESCRIPTION OF DRAWINGS

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the prior art and embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of a double-sided inspection device for a fabric inspection machine provided in an embodiment of the present invention;

[0027] Figure 2 This is a side view of a double-sided inspection device for a fabric inspection machine provided in an embodiment of the present invention;

[0028] Figure 3 This is a front view structural diagram of a double-sided inspection device for a fabric inspection machine provided in an embodiment of the present invention. Detailed Implementation

[0029] This invention provides a double-sided inspection device and a fabric inspection machine, which improves the efficiency and quality of double-sided inspection during use.

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a double-sided inspection device for a fabric inspection machine according to an embodiment of the present invention. The double-sided inspection device includes: multiple guide rollers 1 mounted on a frame, an upper fixed frame 2, a lower fixed frame 3, a first inspection device 4 mounted on the upper fixed frame 2, a second inspection device 5 mounted on the lower fixed frame 3, and a processor 6 connected to the first inspection device 4 and the second inspection device 5. Two of the multiple guide rollers 1 form an inspection area.

[0032] Multiple guide rollers 1 are used to transfer the fabric to be inspected from the infeed end of the fabric inspection machine to the outlet end of the fabric inspection machine;

[0033] The first detection device 4 is used to collect fabric information on the upper side of the fabric to be detected located in the detection area during the transfer of the fabric to be detected, and obtain the upper side fabric information.

[0034] The second detection device 5 is used to collect fabric information on the lower side of the fabric to be tested located in the detection area during the transmission of the fabric to be tested, and to obtain the fabric information on the lower side.

[0035] Processor 6 is used to perform defect detection on the fabric to be inspected based on the information of the upper side fabric and the lower side fabric.

[0036] It should be noted that when the fabric to be inspected enters the fabric inspection machine from the feed end, it is sequentially transported through the various guide rollers to the output end. A detection area is formed between two guide rollers 1. During the transport of the fabric to be inspected through multiple guide rollers, every position on the fabric will pass through this detection area. The first detection device 4 and the second detection device 5 collect fabric information from the upper and lower sides of the fabric area within this detection area, respectively obtaining the upper and lower side fabric information. The first detection device 4 sends the upper side fabric information to the processor 6, and the second detection device 5 sends the upper side fabric information to the processor 6. The processor 6 can analyze the upper side fabric information to obtain the fabric defect detection result corresponding to the upper side, and analyze the lower side fabric information to obtain the fabric defect detection result corresponding to the lower side, thus achieving double-sided inspection of the fabric during the inspection process.

[0037] Based on the above embodiments, please refer to Figures 2 to 3 The embodiments in this application will further illustrate and introduce the technical solution.

[0038] In one embodiment, the first detection device 4 includes a first image acquisition unit 41 and a first light source 42. The first image acquisition unit 41 is disposed on the upper fixed frame 2 at one end away from the upper surface of the detection area and facing the upper surface of the detection area. The first light source 42 is disposed on the upper fixed frame 2 at one end close to the upper surface of the detection area and facing the upper surface of the detection area.

[0039] The second detection device 5 includes a second image acquisition unit 51 and a second light source 52. The second image acquisition unit 51 is disposed on the lower fixed frame 3 at one end away from the lower surface of the detection area and facing the lower surface of the detection area. The second light source 52 is disposed on the lower fixed frame 3 at one end close to the lower surface of the detection area and facing the lower surface of the detection area.

[0040] It should be noted that, in order to improve detection accuracy, the first detection device 4 in this embodiment may include a first image acquisition unit 41 and a first light source 42, wherein the first image acquisition unit 41 is disposed as follows: Figure 2The upper fixed frame 2 is positioned at its top, and the imaging end of the first image acquisition device 41 faces the upper surface of the detection area. The first light source 42 is located at the bottom of the upper fixed frame 2, and the light outlet of the first light source 42 faces the upper surface of the detection area. Therefore, when the fabric to be tested passes through the detection area, the upper surface of the fabric to be tested in the detection area is illuminated by the first light source 42. The first image acquisition device 41 will simultaneously acquire the image information of the upper surface of the fabric to be tested in the detection area and send the image information as the upper side fabric information to the processor 6 for fabric defect detection.

[0041] Similarly, for the other side of the fabric to be inspected, the second inspection device 5 in this embodiment is equipped with a second image acquisition unit 51 and a second light source 52. The second image acquisition unit 51 is located at the top of the lower fixing frame 3, which is closer to the ground. The second light source 52 is located at the bottom of the lower fixing frame 3, which is closer to the inspection area. When the fabric to be inspected passes through the inspection area, the second light source 52 illuminates the lower surface of the fabric in the inspection area. The second image acquisition unit 51 simultaneously acquires image information of the lower surface of the fabric in the inspection area and sends this image information as the lower side fabric information to the processor 6 for fabric defect detection, thereby realizing double-sided inspection of each area of ​​the fabric to be inspected.

[0042] In addition, the first image acquisition device 41 may also include a first adjustment frame 43 for adjusting the first image acquisition device 41, specifically adjusting the angle of the first image acquisition device 41 and other information; the second image acquisition device 51 may also include a second adjustment frame 53 for adjusting the second image acquisition device 51, specifically adjusting the angle of the second image acquisition device 51 and other information.

[0043] In one embodiment, the plurality of guide rollers 1 in this application embodiment may be a first guide roller 11, a second guide roller 12, a third guide roller 13, a fourth guide roller 14, and a fifth guide roller 15. The first guide roller 11 is disposed at the fabric inlet end of the frame, the second guide roller 12 and the third guide roller 13 are disposed in the middle area of ​​the frame, and the fourth guide roller 14 and the fifth guide roller 15 are disposed at the tail end of the frame. The area between the second guide roller 12 and the third guide roller 13 is defined as the detection area, so that the area of ​​the fabric to be detected that is transmitted from the second guide roller 12 to the third guide roller 13 corresponds to the detection area.

[0044] It should be noted that, in this embodiment of the application, when collecting fabric information of the fabric to be tested, the fabric to be tested enters the fabric inspection machine from the first guide roller 11 at the fabric inlet and is transferred to the second guide roller 12 to enter the inspection area. In the inspection area, the first light source 42, the first image acquisition device 41, the second light source 52, and the second image acquisition device 51 start working to acquire the image information of the upper surface and the lower surface of the fabric to be tested in the inspection area. Based on the image information of the upper surface and the lower surface, double-sided inspection of the corresponding area of ​​the fabric to be tested is realized. Since each area of ​​the fabric to be tested will pass through the inspection area, double-sided inspection of each area of ​​the fabric to be tested can be realized during the transmission of the fabric to be tested.

[0045] In one embodiment, to further improve detection accuracy, the detection area in this application embodiment is a horizontal detection area, the orientation of the first image acquisition device 41 is downward relative to the horizontal detection area, and the orientation of the second image acquisition device 51 is upward relative to the horizontal detection area.

[0046] It is understood that in this embodiment, the first image acquisition device 41 is vertically downward to acquire image information of the upper surface of the fabric to be detected in the detection area, and the second image acquisition device 51 is vertically upward to acquire image information of the lower surface of the fabric to be detected in the detection area.

[0047] Specifically, in the embodiments of this application, the first light source 42 and / or the second light source 52 are linear array light sources, and the linear array light source can be a light source formed by a strip LED array, wherein the strip LED array is arranged parallel to the fabric to be tested along the movement direction of the fabric to be tested.

[0048] It should be noted that, in order to improve detection accuracy, the first image acquisition device 41 and the second image acquisition device 51 in this embodiment can both be line scan cameras, and the first light source 42 and / or the second light source 52 can illuminate the monitoring area at a preset tilt angle, wherein the preset tilt angle can be 35~50°.

[0049] In one embodiment, the device may further include a swing arm mechanism 7, which may include a fixed rod 71, a swing arm 72, a sixth guide roller 73, and a seventh guide roller 74. The two ends of the fixed rod 71 are rotatably mounted on the frame via bearings. The sixth guide roller 73 and the seventh guide roller 74 are arranged parallel to the fixed rod 71. The two ends of the sixth guide roller 73 and the seventh guide roller 74 are respectively connected via corresponding swing arms 72. The swing arm mechanism 7 transmits the fabric to be tested from the third guide roller 13 to the fourth guide roller 14 via the sixth guide roller 73 and the seventh guide roller 74, and then transmits it to the fifth guide roller 15 located at the fabric output end via the fourth guide roller 14 to output the fabric to be tested.

[0050] It should be noted that, in order to ensure that the fabric to be tested is kept taut during transmission and that the detection plane of the detection area remains stable, so that the first image acquisition unit 41 and the second image acquisition unit 42 can acquire image information of every part of the fabric to be tested, and avoid some parts being blocked and thus missing detection, so as to ensure the detection quality, the double-sided detection device in this embodiment may also include a rocker mechanism 7. The first ends of the sixth guide roller 73 and the seventh guide roller 74 in the rocker mechanism 7 are connected by a swing arm 72, and the second ends of the sixth guide roller 73 and the seventh guide roller 74 are connected by another swing arm 72. Thus, a downward force can be provided through the lever principle, providing an additional tension to the fabric surface, keeping the fabric surface taut, so as to keep the fabric surface of the fabric to be tested in the detection area flat, so that the image acquisition unit can better detect every position of the fabric surface.

[0051] In one embodiment, the device may further include an encoder 8 mounted on the upper fixed frame. The encoder 8 is used to detect the speed of the fabric to be tested being transported on the third guide roller 13, and to control the first image acquisition device 41 and the first light source 42 to work synchronously, and to control the second image acquisition device 51 and the second light source 52 to work synchronously.

[0052] It is understood that, in order to maintain the synchronous operation of the first image acquisition device 41 and the first light source 42, and the synchronous operation of the second image acquisition device 51 and the second light source in this embodiment of the application, an encoder 8 can be set at the bottom of the upper fixed frame 2. The encoder 8 can be connected to the upper fixed frame 2 through the encoder bracket 81. The encoder 8 is set parallel to the third guide roller 13, so that the transmission rate of the fabric to be tested on the third guide roller 31 can be detected. When the encoder 7 detects that the transmission rate of the fabric to be tested is uniform, it can control the first image acquisition device 41 and the first light source 42 to work synchronously according to a preset frequency, and control the second image acquisition device 51 and the second light source 52 to work synchronously, so as to ensure that the detection results are more accurate.

[0053] It should also be noted that the first image acquisition device 41 and the second image acquisition device 51 in this embodiment can be linear scan cameras. Since the working principle of a linear scan camera is to use a single-row pixel sensor for continuous scanning, a synchronous triggering mechanism is formed with the uniform movement of the fabric being tested. High-resolution image data is acquired row by row during the fabric's movement, and finally stitched together to form a complete two-dimensional image. Furthermore, both the first light source 42 and the second light source 52 in this embodiment can be linear scan light sources, and can be linear light sources using a strip LED array. The strip LED array can be arranged parallel to the direction of fabric movement. By precisely controlling the illumination angle, brightness, and wavelength (such as white light, infrared light, or multi-color combination light) of the strip LED array, a uniform and stable lighting environment can be formed on the surface of the fabric to be tested in the detection area. In this embodiment, the encoder 8 controls the first image acquisition unit 41 and the first light source 42 to work together, and controls the second image acquisition unit 51 and the second light source 52 to work together, so that the image acquisition units and the corresponding light sources are synchronized and operate at the same frequency. That is, when the fabric to be detected passes through the detection area, the encoder 8 provides real-time feedback of the motion speed signal, and controls the rotation speed of each guide roller according to the motion speed signal fed back by the encoder 8, so that the fabric to be detected passes through the detection area at a uniform speed, and triggers the line array camera to work synchronously with the corresponding line array light source. In this embodiment, the line array light source can be incident on the fabric surface at a preset angle (such as low-angle grazing or vertical illumination), thereby highlighting the fabric surface texture and defect features. The line array camera can capture the reflected light signal of each row of fabric with a microsecond-level exposure time to form image information. The dynamic matching mechanism in this embodiment can eliminate motion blur and enhance the contrast between defects and background (such as differentiated development of different defects such as broken warp, weft, and oil stains), thereby improving detection accuracy and detection quality.

[0054] In addition, in practical applications, multiple sets of image information can be collected in advance and combined with deep learning models (such as convolutional neural networks) to train a defect detection model. When the processor 6 detects defects in the upper and lower side fabric information, it can use the pre-trained defect detection model to detect defects in the upper and lower side fabric information in real time. For example, it can detect defects through texture comparison, pattern recognition and defect classification algorithms, thereby achieving accurate positioning of defects. For example, it can accurately locate and mark defects as small as 0.1 mm².

[0055] Therefore, the double-sided inspection device of the fabric inspection machine in this invention is equipped with a first inspection device and a second inspection device. During the process of multiple guide rollers conveying the fabric to be inspected, each position of the fabric to be inspected will pass through the inspection area. The first inspection device and the second inspection device can collect fabric information on the upper and lower sides of the area corresponding to the fabric to be inspected located in the inspection area, respectively, to obtain the corresponding upper side fabric information and lower side fabric information. The processor can realize defect detection by analyzing the upper side fabric information and lower side fabric information, thereby realizing automatic double-sided inspection of the fabric to be inspected without manual reverse inspection, which improves the double-sided inspection efficiency and inspection quality of the fabric inspection machine.

[0056] Furthermore, the detection equipment in this application embodiment can simultaneously identify warp breaks, weft skew, holes, stains, and hidden defects (such as reverse side see-through and interlayer foreign objects) on both sides of the fabric to be inspected. It is particularly suitable for the precise quality inspection of complex fabrics with different colors on both sides and jacquard patterns, and can achieve full-range defect detection without blind spots. Based on the characteristics of the line scan camera, it can adapt to the simultaneous detection of special materials such as ultra-wide width (such as 3.6-meter tarpaulin), high light transmittance (chiffon), or high reflectivity (coated fabric). Combined with multispectral light source technology, it can enhance the imaging contrast of specific defects (such as oil stains and watermarks) and ensure detection accuracy.

[0057] In practical applications, artificial intelligence algorithms can be used to compare the spatial location and morphological characteristics of defects on both sides, which is beneficial for tracing the root causes of defects in the production process (such as periodic defects caused by wear on loom needles). Furthermore, based on the collected double-sided fabric information, a three-dimensional defect map of the fabric can be constructed using deep learning models, providing a quantitative basis for process optimization. In addition, this equipment can be applied in industrial scenarios with "zero-defect" requirements, such as automotive airbag fabric and aerospace composite materials, helping to reduce the missed detection rate to below 0.01% and reduce quality rework costs by more than 30%, making it a key infrastructure for comprehensive quality control of textiles in the era of intelligent manufacturing.

[0058] Another aspect of the present invention provides a fabric inspection machine, including a double-sided inspection device as described above.

[0059] It should be noted that the fabric inspection machine provided in the embodiments of the present invention has the same beneficial effects as the double-sided inspection device of the fabric inspection machine provided in the above embodiments. For a detailed description of the double-sided fabric inspection device involved in the embodiments of this application, please refer to the above embodiments, and this application will not repeat it here.

[0060] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0061] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0062] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A double-sided inspection device for a fabric inspection machine, characterized in that, include: A plurality of guide rollers mounted on a frame, an upper fixed frame, a lower fixed frame, a first detection device mounted on the upper fixed frame, a second detection device mounted on the lower fixed frame, and a processor connected to the first and second detection devices; wherein, a detection area is formed between two of the plurality of guide rollers, and: Multiple guide rollers are used to transfer the fabric to be inspected from the infeed end of the fabric inspection machine to the outlet end of the fabric inspection machine; The first detection device is used to collect fabric information on the upper side of the fabric to be tested located in the detection area during the transmission of the fabric to be tested, and obtain the upper side fabric information. The second detection device is used to collect fabric information on the lower side of the fabric to be tested located within the detection area during the transmission of the fabric to be tested, and to obtain the lower side fabric information. The processor is used to perform defect detection on the fabric to be inspected based on the information of the upper side fabric and the lower side fabric.

2. The double-sided inspection device for the fabric inspection machine according to claim 1, characterized in that, The first detection device includes a first image acquisition unit and a first light source. The first image acquisition unit is disposed on the upper fixed frame at one end away from the upper surface of the detection area and facing the upper surface of the detection area. The first light source is disposed on the upper fixed frame at one end close to the upper surface of the detection area and facing the upper surface of the detection area. The second detection device includes a second image acquisition unit and a second light source. The second image acquisition unit is disposed on the lower fixed frame at one end away from the lower surface of the detection area and facing the lower surface of the detection area. The second light source is disposed on the lower fixed frame at one end close to the lower surface of the detection area and facing the lower surface of the detection area.

3. The double-sided inspection device for the fabric inspection machine according to claim 1, characterized in that, The plurality of guide rollers include a first guide roller located at the fabric inlet end of the frame, a second and a third guide roller located in the middle region of the frame, and a fourth and a fifth guide roller located at the tail end of the frame. The area between the second and the third guide rollers is a detection area, so that the area of ​​the fabric to be detected that is transmitted from the second guide roller to the third guide roller corresponds to the detection area.

4. The double-sided inspection device for the fabric inspection machine according to claim 3, characterized in that, The detection area is a horizontal detection area, the first image acquisition device is oriented downwards perpendicular to the horizontal detection area, and the second image acquisition device is oriented upwards perpendicular to the horizontal detection area.

5. The double-sided inspection device for the fabric inspection machine according to claim 1, characterized in that, The device further includes a swing arm mechanism, which comprises a fixed rod, a swing arm, a sixth guide roller, and a seventh guide roller. The two ends of the fixed rod are rotatably mounted on the frame via bearings. The sixth and seventh guide rollers are arranged parallel to the fixed rod, and their ends are connected via corresponding swing arms. The swing arm mechanism transmits the fabric to be tested, which is conveyed by the third guide roller, to the fourth guide roller via the sixth and seventh guide rollers. The fabric to be tested is then output from the fifth guide roller located at the fabric outlet end via the fourth guide roller.

6. The double-sided inspection device for the fabric inspection machine according to claim 1, characterized in that, It also includes an encoder mounted on the upper fixed frame, the encoder being used to detect the speed of the fabric to be tested being transported on the third guide roller, and to control the first image acquisition device and the first light source to work synchronously, and to control the second image acquisition device and the second light source to work synchronously.

7. The double-sided inspection device for the fabric inspection machine according to claim 2, characterized in that, The first light source and / or the second light source are linear array light sources.

8. The double-sided inspection device for the fabric inspection machine according to claim 1, characterized in that, The linear array light source is a light source formed by a strip LED array.

9. The double-sided inspection device for the fabric inspection machine according to claim 1, characterized in that, The strip LED array is arranged parallel to the fabric being tested, along the direction of its movement.

10. A fabric inspection machine, characterized in that, Includes a double-sided inspection device for a fabric inspection machine as described in any one of claims 1 to 9.

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