CN114384081A - Textile cloth defect detection device and detection method thereof - Google Patents

Textile cloth defect detection device and detection method thereof Download PDF

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Publication number
CN114384081A
CN114384081A CN202111582003.7A CN202111582003A CN114384081A CN 114384081 A CN114384081 A CN 114384081A CN 202111582003 A CN202111582003 A CN 202111582003A CN 114384081 A CN114384081 A CN 114384081A
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textile cloth
control system
semiconductor laser
detection
light
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CN202111582003.7A
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CN114384081B (en
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刘晖
李思嘉
靳萤鹏
樊信显
孙戬
熊玲玲
马训鸣
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Xian Polytechnic University
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Xian Polytechnic University
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
    • G01N21/8901—Optical details; Scanning details
    • G01N21/8903—Optical details; Scanning details using a multiple detector array
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
    • G01N2021/8909—Scan signal processing specially adapted for inspection of running sheets
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/30—Computing systems specially adapted for manufacturing

Abstract

The invention discloses a textile cloth defect detection device and a detection method thereof, and the textile cloth defect detection device comprises a drive control system, wherein the drive control system is connected with a semiconductor laser array, a fast-slow axis collimating lens and a beam splitter are sequentially arranged on an emergent light path of the semiconductor laser array, the beam splitter is respectively connected with a transmission imaging system and a photoelectric detection system, and the transmission imaging system is also connected with an off-axis beam control system. The semiconductor laser irradiates the surface of the textile cloth, reflected light on the surface of the textile cloth is fed back to the variable quantity of the intensity of the self-mixing interference signal in the cavity of the semiconductor laser, the defect of the textile cloth is judged, the application of a complex algorithm is not needed, the real-time quick response detection can be realized, and the defects of low detection response speed and error identification caused by mass data processing are avoided. Weaving cloth defect detecting device, simple structure can improve and detect precision and efficiency.

Description

Textile cloth defect detection device and detection method thereof
Technical Field
The invention belongs to the technical field of textile material detection methods, relates to a textile cloth defect detection device, and further relates to a detection method of the detection device.
Background
In the cloth manufacturing process, along with the increase of processing levels, the probability of generating defects is increased, and the defects of various types, including loose warps and wefts, pollution, warp fluffing, unclearly opening, hole breaking and the like, are faced. Two types of defect detection are commonly used: artificial vision defect detection and machine vision detection. In the manual visual inspection, a long training process is required from defect learning to operation inspection, and from sparseness to proficiency; even skilled workers are prone to physical and psychological fatigue, resulting in extremely low detection efficiency. Machine vision is currently used to replace artificial vision defect detection. In machine vision detection, a deep learning technology is usually introduced, intelligent processing of visible light images is realized by continuously training and optimizing a large number of defect images and applying advanced algorithms such as a deep neural network and the like, and cloth defects are quickly identified by combining a filtering algorithm, so that higher detection accuracy is achieved in the detection process which is easy to make mistakes. However, machine vision is mainly based on advanced algorithm of deep learning to recognize defects, image processing process of mass data is inevitable, data processing time delay is generated, error rate of defect recognition is generated in the data processing process, and especially, defects with novel characteristics are firstly generated.
Disclosure of Invention
The invention aims to provide a textile cloth defect detection device, which solves the problem of error of defect identification in the prior art.
The textile cloth defect detection device comprises a drive control system, wherein the drive control system is connected with a semiconductor laser array, a fast-slow axis collimating lens and a beam splitter are sequentially arranged on an emergent light path of the semiconductor laser array, the beam splitter is respectively connected with a transmission imaging system and a photoelectric detection system, and the transmission imaging system is also connected with an off-axis beam control system.
The invention is also characterized in that:
the photoelectric detection system comprises a photoelectric detector, the photoelectric detector is connected with a computer through a data acquisition unit, and the photoelectric detector is connected with the beam splitter.
The device also comprises a motion control system for controlling the starting and stopping of the textile cloth manufacturing, and the motion control system is connected with a computer.
The invention also aims to provide a textile cloth defect detection method.
The invention adopts another technical scheme that the textile cloth defect detection method adopts the textile cloth defect detection device, and comprises the following steps:
step 1, light beams emitted by a semiconductor laser array are collimated and emitted after passing through a fast-axis collimating mirror and a slow-axis collimating mirror;
step 2, dividing the light beam emitted by the fast and slow axis collimating mirror into two parts of light beams through a light beam splitter, wherein one part of the light beam is incident to a transmission imaging system, and the other part of the light beam is incident to a photoelectric detector;
step 3, forming compact linear array light spots on the detected textile cloth by the light beams entering the transmission imaging system, and simultaneously controlling the off-axis light beams in the imaging light beams by the off-axis light beam control system to eliminate aberration formed by the off-axis light beams;
step 4, detecting a part of light beams of compact linear array light spots on the textile cloth, feeding back the part of light beams to the semiconductor laser array along the transmission imaging system, the light beam splitter and the fast-slow axis collimating mirror to form a self-mixing interference signal;
and 5, after the self-mixing interference signals pass through the fast-slow axis collimating mirror and the light beam splitter, one beam of the self-mixing interference signals is incident to the transmission imaging system, the other beam of the self-mixing interference signals is incident to the photoelectric detector for detection, the data acquisition unit acquires the self-mixing interference signals of the photoelectric detector and sends the self-mixing interference signals to the computer, and the computer realizes the detection of the textile cloth defects through the judgment of the intensity variation of the self-mixing interference signals.
And 6, when detecting that the textile cloth is defective, controlling the motion control system to stop weaving by the computer.
The invention has the beneficial effects that:
according to the textile cloth defect detection method, the semiconductor laser is irradiated to the surface of the textile cloth, reflected light on the surface of the textile cloth is fed back to the variation of the intensity of the self-mixing interference signal in the cavity of the semiconductor laser, and the textile cloth defect is judged. Weaving cloth defect detecting device, simple structure can improve and detect precision and efficiency.
Drawings
FIG. 1 is a schematic structural diagram of a textile cloth defect detecting device of the present invention;
FIG. 2 is a diagram of the detection result of the textile cloth defect detection method of the present invention.
In the figure: 1. the system comprises a driving control system, 2, a semiconductor laser array, 3, a fast-slow axis collimating mirror, 4, a beam splitter, 5, a transmission imaging system, 6, an off-axis beam control system, 7, a photoelectric detector, 8, a motion control system, 9, a computer and 10, a data acquisition unit.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Textile cloth defect detection device, as shown in fig. 1, includes drive control system 1, and drive control system 1 is connected with semiconductor laser array 2, and drive control system 1 is used for providing drive power supply for semiconductor laser array 2 to control the operating temperature of semiconductor laser. A fast-slow axis collimating mirror 3 and a beam splitter 4 are sequentially arranged on an emergent light path of the semiconductor laser array 2, the beam splitter 4 is respectively connected with a transmission imaging system 5 and a photoelectric detection system, the transmission imaging system 5 is further connected with an off-axis beam control system 6, and the off-axis beam control system 6 controls off-axis beams in imaging beams of the transmission imaging system 5 to eliminate aberration formed by the off-axis beams. The photoelectric detection system comprises a photoelectric detector 7, the photoelectric detector 7 is connected with a computer 9 through a data acquisition device 10, and the photoelectric detector 7 is connected with the beam splitter 4. The spinning machine further comprises a motion control system 8 used for controlling starting and stopping of the textile cloth manufacturing, the motion control system 8 is connected with a computer 9, and when the textile cloth is detected to be defective, the spinning machine is controlled to stop spinning.
The textile cloth defect detection method specifically comprises the following steps:
step 1, a drive control system 1 provides a drive power supply for a semiconductor laser array 2, controls the working temperature of the semiconductor laser, and collimates and emits light beams emitted by the semiconductor laser array 2 after passing through a fast-slow axis collimating mirror 3;
step 2, the light beam emitted by the fast and slow axis collimating mirror 3 is divided into two parts of light beams by a light beam splitter 4, one part of the light beams is incident to a transmission imaging system 5, and the other part of the light beams is incident to a photoelectric detector 7;
step 3, forming compact linear array light spots on the detected textile cloth by the light beams entering the transmission imaging system 5, and simultaneously controlling the off-axis light beams in the imaging light beams by the off-axis light beam control system 6 to eliminate the aberration formed by the off-axis light beams;
step 4, detecting a part of light beams of the compact linear array light spots on the textile cloth, forming Doppler effect on light reflection along the transmission imaging system 5, the light beam splitter 4 and the fast-slow axis collimating mirror 3, and feeding back the Doppler effect to the semiconductor laser array 2 to form a self-mixing interference signal; when a defect occurs in the textile cloth, the surface of the textile cloth affects the reflectivity of the laser, thereby affecting the intensity of the self-mixing interference signal. The self-mixing interference signal of cloth defect detection is shown in FIG. 2, wherein the straight line represents the signal without defects; when illuminated onto a cloth defect, a fringe-like self-mixing interference signal appears.
Step 5, after the self-mixing interference signals pass through the fast-slow axis collimating mirror 3 and the light beam splitter 4, one beam of the self-mixing interference signals is incident to the transmission imaging system 5, the other beam of the self-mixing interference signals is incident to the photoelectric detector 7 for detection, the data acquisition unit 10 acquires the self-mixing interference signals of the photoelectric detector 7 and sends the self-mixing interference signals to the computer 9, and the computer 9 judges the intensity variation of the self-mixing interference signals to realize the detection of the textile cloth defects;
and 6, when detecting that the textile cloth is defective, controlling the motion control system 8 to stop weaving by the computer 9.
Through the mode, the textile cloth defect detection method provided by the invention has the advantages that the semiconductor laser is irradiated to the surface of the textile cloth, the reflected light on the surface of the textile cloth is fed back to the variable quantity of the intensity of the self-mixing interference signal in the cavity of the semiconductor laser, the textile cloth defect is judged, the application of a complex algorithm is not needed, the real-time quick response detection can be realized, and the defect of low detection response speed caused by mass data processing is avoided. The textile cloth defect detection device is simple in structure and capable of improving detection efficiency.

Claims (5)

1. Weaving cloth defect detecting device, its characterized in that, including drive control system (1), drive control system (1) is connected with semiconductor laser array (2), set gradually fast slow axis collimating mirror (3), beam splitter (4) on the emergent light of semiconductor laser array (2), beam splitter (4) are connected with transmission imaging system (5), photoelectric detection system respectively, transmission imaging system (5) still are connected with off-axis beam control system (6).
2. Textile cloth defect detection apparatus according to claim 1, wherein the photo detection system comprises a photo detector (7), the photo detector (7) is connected with a computer (9) through a data collector (10), and the photo detector (7) is connected with the beam splitter (4).
3. A textile cloth defect detecting device according to claim 2, characterized in that, a motion control system (8) is further included for controlling the start and stop of the textile cloth manufacturing, and the motion control system (8) is connected with the computer (9).
4. A textile cloth defect detecting method, characterized in that the textile cloth defect detecting device of claim 3 is adopted, comprising the steps of:
step 1, light beams emitted by the semiconductor laser array (2) are collimated and emitted after passing through a fast-axis collimating mirror (3);
step 2, the light beam emitted by the fast and slow axis collimating mirror (3) is divided into two parts of light beams by a light beam splitter (4), one part of the light beam is incident to a transmission imaging system (5), and the other part of the light beam is incident to a photoelectric detector (7);
step 3, forming compact linear array light spots on the detected textile cloth by the light beams entering the transmission imaging system (5), and simultaneously controlling the off-axis light beams in the imaging light beams by the off-axis light beam control system (6) to eliminate aberration formed by the off-axis light beams;
step 4, detecting a part of light beams of compact linear array light spots on the textile cloth, and feeding back the part of light beams to the semiconductor laser array (2) along the transmission imaging system (5), the light beam splitter (4) and the fast-slow axis collimating mirror (3) to form a self-mixing interference signal;
and step 5, after the self-mixing interference signal passes through the fast-slow axis collimating mirror (3) and the light beam splitter (4), one beam is incident to the transmission imaging system (5), the other beam is incident to the photoelectric detector (7) for detection, the self-mixing interference signal acquired by the data acquisition unit (10) from the photoelectric detector (7) is sent to the computer (9), and the computer (9) realizes the detection of the textile cloth defect through the judgment of the intensity variation of the self-mixing interference signal.
5. The textile cloth defect detection method of claim 4, further comprising a step 6, wherein when the textile cloth defect is detected, the computer (9) controls the motion control system (8) to stop weaving.
CN202111582003.7A 2021-12-22 2021-12-22 Textile cloth defect detection device and detection method thereof Active CN114384081B (en)

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