A grey fabric backside detection device

Abstract

The utility model discloses a kind of white grey cloth back detection devices, installation support is symmetrically arranged at the both ends of detection channel, vertical and horizontal fine adjustment swallow-tail sliding table is assembled on support, sliding table installs infrared opposite emission probe.Probe is connected with the signal processing unit of fiber amplifier and 220VAC shutdown relay, and it is triggered by dynamic adjustment emission power and shutdown signal.U-shaped groove iron parallel to each other is laid on the both sides of detection channel, and probe is located in the axial covering range of groove iron.Swallow-tail sliding table is composed of vertical / horizontal fine adjustment platform, and independent fine adjustment rod is separately arranged and equipped with quick lock mechanism to realize instantaneous locking;Groove iron outside is embedded photosensitive sensor, and forms ambient light compensation closed loop with fiber amplifier;Magnetic type mounting base is arranged at the bottom of sliding table to realize quick disassembly and assembly.

Description

Technical Field

[0001] This utility model relates to the field of textile testing machinery technology, and in particular to a device for testing the back side of greige fabric. Background Technology

[0002] The detection of back-side defects (such as broken yarns, knots, stains, etc.) in the production process of greige fabric has long faced technical bottlenecks. Traditional solutions mainly suffer from the following drawbacks: reliance on visual inspection by patrol personnel, which is affected by lighting conditions and visual fatigue, resulting in a missed detection rate as high as 15%-20%; manual inspection mode has a slow response speed, and by the time defects are discovered, 50-100 meters of waste fabric have already been generated, causing material waste; in addition, the high-frequency vibration caused by the high-speed movement of the yarn (typically 2-3 m / s) leads to the offset of the infrared beam path, resulting in a false trigger rate >25%; furthermore, ambient light in the workshop (especially the flicker of LED lighting) interferes with signal acquisition, requiring additional filters and increasing costs. In summary, there is an urgent need for a greige fabric back-side inspection device that combines precise alignment capabilities, anti-vibration interference mechanisms, and an optimized optical path structure. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a device for detecting the back side of raw fabric.

[0004] A back-side inspection device for raw fabric according to a first aspect of the present invention is disposed at both ends of the inspection channel of the device to be tested, characterized in that it comprises:

[0005] Two mounting brackets are respectively installed at both ends of the detection channel;

[0006] Two symmetrically arranged adjustment mechanisms are respectively mounted on the mounting bracket. Each adjustment mechanism includes a dovetail slide that can be finely adjusted vertically and horizontally, and an infrared beam detector mounted on the dovetail slide. The infrared beam detector is electrically connected to a signal processing unit for triggering a stop signal. The signal processing unit includes an optical fiber amplifier connected to the device under test for controlling the transmission power of the infrared beam detector, and a 220VAC stop relay for controlling start and stop. Parallel slot irons are respectively installed at both ends of the detection channel, and the infrared beam detector is positioned within the axial range of the slot irons.

[0007] According to an embodiment of this utility model, a back-side inspection device for greige fabric has at least the following beneficial effects: This utility model, through the coordinated design of a symmetrical dovetail slide dual-axis micro-adjustment mechanism and a channel iron limiting optical path, utilizes the vertical / horizontal bidirectional micro-adjustment (±0.1mm level) of the dovetail slide in conjunction with the precise positioning of an infrared through-beam probe, completely solving the problem of missed detection caused by optical path offset in traditional devices and improving the narrow seam defect recognition rate. Furthermore, the parallel channel iron forms a wide yarn limiting channel, suppressing high-speed fabric surface vibration and reducing the false trigger rate. The design of the channel iron axially wrapping the infrared optical path physically isolates ambient light interference. The fiber optic amplifier dynamically adjusts its transmission power (with real-time feedback through the signal processing unit), overcoming workshop lighting flicker interference and ensuring stable operation under high illumination fluctuations. This utility model, with dual-axis micro-adjustment and channel iron limiting as its core, fiber optic amplifier power self-adaptation as its support, and a highly sensitive shutdown relay as its electrical response guarantee, constructs a three-in-one highly reliable detection system, providing the textile industry with the first back-side defect detection device that combines micron-level accuracy, millisecond-level response, and intelligent operation and maintenance.

[0008] According to some embodiments of the present invention, the dovetail slide includes a vertical fine-tuning platform and a horizontal fine-tuning platform. A vertical fine-tuning rod is provided on the vertical fine-tuning platform, and a horizontal fine-tuning rod is provided on the horizontal fine-tuning platform. The end of the dovetail slide is provided with a quick-locking mechanism for locking the vertical fine-tuning platform and the horizontal fine-tuning platform.

[0009] According to some embodiments of this utility model, the channel iron has a U-shaped cross-section, an inner cavity width of 41±0.5mm, and a depth of 21±0.5mm.

[0010] According to some embodiments of the present invention, an ambient light compensation unit is also included, wherein the ambient light compensation unit includes a photosensitive sensor embedded on the outside of the slot iron, and the photosensitive sensor is connected to the fiber optic amplifier.

[0011] According to some embodiments of the present invention, the bottom of the dovetail slide has a magnetic mounting base, which is magnetically attached to the mounting bracket.

[0012] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0013] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0014] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0015] Figure 2 This is a schematic diagram of the detection process according to an embodiment of the present utility model;

[0016] Figure 3 This is a schematic diagram of the infrared beam detector and signal processing unit according to an embodiment of the present invention.

[0017] 10. Mounting bracket; 20. Adjustment mechanism; 21. Dovetail slide; 211. Vertical fine-tuning platform; 212. Vertical fine-tuning rod; 213. Horizontal fine-tuning platform; 214. Horizontal fine-tuning rod; 215. Quick-lock mechanism; 30. Infrared beam detector; 40. Channel iron. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0021] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0022] Reference Figure 1 A back-side inspection device for raw fabric according to a first aspect of the present invention is disposed at both ends of the inspection channel of the device to be tested, characterized in that it comprises:

[0023] Two mounting brackets 10 are respectively installed at both ends of the detection channel;

[0024] Two symmetrically arranged adjustment mechanisms 20 are respectively mounted on the mounting bracket 10. Each adjustment mechanism 20 includes a dovetail slide 21 that can be adjusted vertically and horizontally, and an infrared beam detector 30 mounted on the dovetail slide 21. The infrared beam detector 30 is electrically connected to a signal processing unit for triggering a stop signal. The signal processing unit includes an optical fiber amplifier connected to the device under test for controlling the transmission power of the infrared beam detector 30, and a 220VAC stop relay for controlling start and stop. Parallel slot irons 40 are respectively installed at both ends of the detection channel, and the infrared beam detector 30 is positioned within the axial range of the slot irons 40.

[0025] According to an embodiment of the present invention, a back-side inspection device for greige fabric has at least the following beneficial effects: The present invention, through the coordinated design of the symmetrical dovetail slide 21 dual-axis micro-adjustment mechanism and the channel iron 40 limiting optical path, utilizes the vertical / horizontal bidirectional micro-adjustment (±0.1mm level) of the dovetail slide 21 in conjunction with the infrared beam probe 30 for precise positioning, completely solving the problem of missed detection caused by optical path offset in traditional devices, and improving the narrow seam defect recognition rate; In addition, the parallel channel iron 40 forms a wide yarn limiting channel, suppressing high-speed fabric surface shaking and reducing the false trigger rate; the design of the channel iron 40 axially wrapping the infrared optical path physically isolates ambient light interference; the fiber optic amplifier dynamically adjusts the transmission power (through real-time feedback from the signal processing unit), overcoming workshop lighting flicker interference and ensuring stable operation under high illumination fluctuations. This invention uses dual-axis fine-tuning and 40mm channel iron limit as its core, fiber optic amplifier power adaptive as its support, and high-sensitivity shutdown relay as its electrical response guarantee to build a three-in-one high-reliability detection system. It provides the textile industry with the first back defect detection device that combines micron-level precision, millisecond-level response, and intelligent operation and maintenance.

[0026] According to some embodiments of this utility model, the dovetail slide 21 includes a vertical fine-tuning platform 211 and a horizontal fine-tuning platform 213. A vertical fine-tuning rod 212 is provided on the vertical fine-tuning platform 211, and a horizontal fine-tuning rod 214 is provided on the horizontal fine-tuning platform 213. A quick-locking mechanism 215 for locking the vertical and horizontal fine-tuning platforms 211 and 213 is provided at the end of the dovetail slide 21. Through the design of the vertical and horizontal fine-tuning platforms, combined with independently driven fine-tuning rods, precise and independent adjustment of the infrared probe in key dimensions is achieved. The quick-locking mechanism 215 at the end of the dovetail slide 21 can instantly and securely lock both platforms, completely eliminating the cumulative displacement error caused by traditional locking methods. This structure enables optical path alignment accuracy to break through industry limits, not only meeting the stringent requirements of narrow-slit detection but also significantly reducing production line changeover and debugging time. The anti-reverse design of the fine-tuning rods effectively resists equipment impacts, and combined with the dissimilar material matching slide rail structure, it maintains excellent stability under complex working conditions. Combined with the 40mm optical path shielding system, a near-perfect defect detection rate is achieved, significantly reducing fabric rework losses.

[0027] According to some embodiments of the present invention, the channel iron 40 has a U-shaped cross-section, an inner cavity width of 41±0.5mm, and a depth of 21±0.5mm.

[0028] According to some embodiments of this utility model, an ambient light compensation unit is also included. This unit includes a photosensitive sensor embedded on the outside of the slot iron 40, and the photosensitive sensor is connected to the fiber optic amplifier. The photosensitive sensor embedded on the outside of the slot iron 40 monitors the ambient light intensity in real time and forms a closed-loop control with the fiber optic amplifier to dynamically adjust the infrared probe's emission power. This design automatically maintains a stable detection signal-to-noise ratio even under drastic fluctuations in workshop lighting, significantly suppressing false triggering caused by fluorescent lamp flicker or window glare. It also avoids the maintenance burden of repeated manual adjustments, allowing the device to maintain near-full-load defect detection capability even in complex lighting environments.

[0029] According to some embodiments of this utility model, the bottom of the dovetail slide 21 has a magnetic mounting base, which is magnetically attached to the mounting bracket 10. The magnetic mounting base enables instantaneous attachment and fixation between the dovetail slide 21 and the bracket, forming a gapless rigid connection under the action of a powerful neodymium iron boron magnet, completely eliminating the tool operation required for traditional bolt fastening. This design allows the detection unit to be disassembled and repositioned within 30 seconds, adapting to the rapid production changeover needs of looms with different widths. Simultaneously, the composite vibration damping structure of the magnetic base and the dovetail slide 21 effectively mitigates high-frequency impacts on the equipment, maintaining micron-level positioning accuracy even in vibrating environments, providing a flexible "plug-and-play" detection solution for high-paced textile production lines.

[0030] The embodiments described above with reference to the accompanying drawings have been described in detail. However, the embodiments are not limited to those described above. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the invention.

Claims

1. A device for detecting the back side of raw fabric, disposed at both ends of the detection channel of the device to be tested, characterized in that, include: Two mounting brackets are respectively installed at both ends of the detection channel; Two symmetrically arranged adjustment mechanisms are respectively mounted on the mounting bracket. Each adjustment mechanism includes a dovetail slide that can be finely adjusted vertically and horizontally, and an infrared beam detector mounted on the dovetail slide. The infrared beam detector is electrically connected to a signal processing unit for triggering a stop signal. The signal processing unit includes an optical fiber amplifier connected to the device under test for controlling the transmission power of the infrared beam detector, and a 220VAC stop relay for controlling start and stop. Parallel slot irons are respectively installed at both ends of the detection channel, and the infrared beam detector is positioned within the axial range of the slot irons.

2. The back side detection device for raw fabric according to claim 1, characterized in that: The dovetail slide includes a vertical fine-tuning platform and a horizontal fine-tuning platform. A vertical fine-tuning rod is provided on the vertical fine-tuning platform, and a horizontal fine-tuning rod is provided on the horizontal fine-tuning platform. The end of the dovetail slide is provided with a quick-locking mechanism for locking the vertical fine-tuning platform and the horizontal fine-tuning platform.

3. The back side detection device for raw fabric according to claim 1, characterized in that: The channel iron has a U-shaped cross-section, with an inner cavity width of 41±0.5mm and a depth of 21±0.5mm.

4. The back side detection device for raw fabric according to claim 1, characterized in that: It also includes an ambient light compensation unit, which includes a photosensitive sensor embedded on the outside of the slot iron, and the photosensitive sensor is connected to the fiber optic amplifier.

5. The back side detection device for raw fabric according to claim 1, characterized in that: The bottom of the dovetail slide has a magnetic mounting base, which is magnetically attached to the mounting bracket.

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