Visual detection system and detection method for 8-shaped optical cable based on structured light

Abstract

The invention discloses an 8-shaped optical cable visual detection system and detection method based on structured light, and belongs to the technical field of optical cable surface defect detection.The 8-shaped optical cable visual detection system comprises a first optical detection set arranged in the first direction, and the first optical detection set is used for emitting and receiving linear light along the axial side face of an 8-shaped optical cable; and the second optical detection group is arranged along a second direction and is used for transmitting and receiving planar light along the radial direction of the 8-shaped optical cable. According to the invention, the axial side surface of the 8-shaped optical cable is detected through the first optical detection group, so that surface defect detection of the axial bearing part, the connecting part and the cable core part of the 8-shaped optical cable is realized; the radial direction of the 8-shaped optical cable is detected through the second optical detection group, so that the surface contours of the bearing part and the cable core part are detected, and the radial dimension of the 8-shaped optical cable is ensured; through cooperation of the first optical detection group and the second optical detection group, full exposure of surface defects of the 8-shaped optical cable is realized, and comprehensive detection of the surface of the 8-shaped optical cable is realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of optical cable surface defect detection, and particularly relates to an 8-shaped optical cable vision detection system and detection method based on structured light. Background Art

[0002] At present, there are certain technical difficulties in the appearance detection of 8-shaped optical cables. It is very difficult to ensure accurate dimensions at the 10th position between the upper and lower circular shaft parts of the 8-shaped cable. Those skilled in the art are committed to finding an appearance detection method to detect possible defects in the overall 8-shaped cable. For example, the detection of one kind of appearance defect, the bulge, and timely identification and analysis of the generation of the defective bulge are of great significance for the immediate feedback of the optical cable production process. The reasons for the generation of bulges in the process are related to the die sheath material, impurities in the material itself, and impurity accumulation at the die head position. Timely and accurate identification of the above appearance defects helps to improve the above process and product quality.

[0003] Currently, the conceivable appearance detection methods applied to 8-shaped optical cables, on the one hand, can draw on the detection methods of circular cables. The traditional mechanical means are designed as two semi-circles, a portal sizing die, but it is not applicable to the detection of the 10th position. The traditional mechanical means of circular cables include three-axis system lighting, diameter detectors, and electronic means, mainly detecting the uniform diameter by means of signal transmission and reception. However, for a special-shaped structure with non-uniform shapes in each direction, the above detection methods are not applicable.

[0004] And the traditional detection methods of 8-shaped cables have certain difficulties: there will be jitter, the error will increase, and the jitter of the cable may affect each other in production, amplifying the errors of the two circular cables, and it will cause the large-diameter circular cable in the jitter to move to the part of the small-diameter circular cable, resulting in a process false alarm; for the electronic means, there is no designed detection light that can comprehensively visually collect the surface of the eight-shaped cable, and whether the whole is uniform is a special-shaped structure. The above methods are all difficult to detect the outer contour of the 8-shaped optical cable well and cannot accurately know the surface defects of the 8-shaped optical cable. Summary of the Invention

[0005] In view of one or more of the above defects or improvement requirements of the prior art, the present invention provides an 8-shaped optical cable vision detection system based on structured light to solve the problem that the existing optical cable detection device cannot effectively detect the surface defects of the 8-shaped optical cable.

[0006] To achieve the above object, the present invention provides an 8-shaped optical cable vision detection system based on structured light, which includes A first optical detection group arranged in a first direction, the first optical detection group being configured to emit and receive linear light along the axial side of the figure-eight optical cable, and at least part of the linear light covering the load-bearing part, the connection part, and the cable core part of the figure-eight optical cable; A second optical detection group arranged in a second direction, the second optical detection group being configured to emit and receive planar light along the radial direction of the figure-eight optical cable, and at least part of the planar light covering the load-bearing part and the cable part of the figure-eight optical cable; And the first optical detection group and the second optical detection group cooperate to cover the entire radial area of the figure-eight optical cable.

[0007] As a further improvement of the present invention, the first optical detection group includes two pairs of laterally arranged optical detection units; The two laterally arranged optical detection units are respectively arranged on both sides of the connection part of the figure-eight optical cable, and both of the two laterally arranged optical detection units include a first lateral light emitting component, a first lateral light receiving component, and a second lateral light receiving component; The first lateral light emitting component and the first lateral light receiving component are arranged on one side of the connection part, and the second lateral light receiving component is arranged on the side of the connection part away from the first lateral light receiving component.

[0008] As a further improvement of the present invention, the two laterally arranged optical detection units are arranged at intervals in the first direction.

[0009] As a further improvement of the present invention, the first lateral light emitting component and the first lateral light receiving component are arranged at intervals in the first direction.

[0010] As a further improvement of the present invention, the first lateral light emitting component includes a first light emitting part, a second light emitting part, and a third light emitting part arranged in sequence in the second direction. The light outlet of the first light emitting part is arranged facing the load-bearing part, the light outlet of the second light emitting part is arranged facing the connection part, the light outlet of the third light emitting part is arranged facing the cable core part, and the light intensity of the light emitted by the second light emitting part is greater than the light intensity of the light emitted by the first light emitting part and the third light emitting part.

[0011] As a further improvement of the present invention, the first lateral light emitting component includes a first light emitting part, a second light emitting part, a third light emitting part, a fourth light emitting part, and a fifth light emitting part arranged in sequence in the second direction; wherein, the first light emitting part corresponds to the load-bearing part, the second light emitting part corresponds to the connection area between the load-bearing part and the connection part, the third light emitting part corresponds to the connection part, the fourth light emitting part corresponds to the connection area between the connection part and the cable core part, and the fifth light emitting part corresponds to the cable core; The luminous power of the first light-emitting part is the same as that of the fifth light-emitting part, the luminous power of the second light-emitting part is the same as that of the fourth light-emitting part, and the luminous power of the third light-emitting part is greater than that of the first light-emitting part, the second light-emitting part, the fourth light-emitting part, and the fifth light-emitting part.

[0012] As a further improvement of the present invention, the second optical detection component includes two pairs of arranged surface optical detection units, the two surface optical detection units are respectively arranged at both ends of the connecting part, and the light outlet of one of the surface optical detection units is arranged towards the load-bearing part, and the light outlet of the other surface optical detection unit is arranged towards the cable core part.

[0013] This application also includes a method for detecting surface defects of an 8-shaped optical cable, which includes the following steps: Arrange the optical cable to be measured, the first optical detection group obtains the first standard reception spectrum of the optical cable to be measured, and the second optical detection group obtains the second standard reception spectrum of the optical cable to be measured; Traction the optical cable to be measured, the first optical detection group obtains the first reception spectrum of the first surface of the optical cable to be measured, and the second optical detection group obtains the second reception spectrum of the second surface of the optical cable to be measured; Compare the first reception spectrum with the first standard reception spectrum to obtain the surface defect situation of the first surface of the optical cable to be measured, and compare the second reception spectrum with the second standard reception spectrum to obtain the surface defect situation of the second surface of the optical cable to be measured.

[0014] As a further improvement of the present invention, the first optical detection group includes two pairs of arranged side optical detection units, and both of the side optical detection units include a first side light-emitting component, a first side light-receiving component, and a second side light-receiving component; The specific process of the first optical detection component obtaining the first reception spectrum of the first surface of the optical cable to be measured includes: Arrange the optical cable to be measured in a standard state, the second side light-receiving component receives the light emitted by the first side light-emitting component of the optical cable to be measured in the standard state, and set it as the third standard reception spectrum; the first side light-receiving component receives the light emitted by the first side light-emitting component of the optical cable to be measured in the standard state, and set it as the fourth standard reception spectrum; The second side light-receiving component receives the light emitted by the first side light-emitting component, and set it as the third reception spectrum, and compare the third reception spectrum with the third standard reception spectrum; When the difference between the third reception spectrum and the third standard reception spectrum is within the set threshold, set the light received by the first side light-receiving component as the fourth reception spectrum, and compare the fourth reception spectrum with the fourth standard reception spectrum to obtain the surface defect situation of the first surface of the optical cable to be measured; When the difference between the third received spectrum and the third standard received light intensity spectrum is greater than the set threshold, the position of the optical cable to be measured is shifted. Adjust the fourth received spectrum to the fifth received spectrum, compare the fifth received spectrum with the fourth standard received spectrum, and obtain the first surface defect condition of the optical cable to be measured.

[0015] As long as the above-mentioned improved technical features do not conflict with each other, they can be combined with each other.

[0016] Generally speaking, compared with the prior art, the beneficial effects of the above technical solutions conceived by the present invention include: (1) The 8-shaped optical cable vision detection system based on structured light of the present invention detects the axial side surface of the 8-shaped optical cable through the first optical detection group, and realizes the surface defect detection of the axial load-bearing part, connection part and cable core part of the 8-shaped optical cable; at the same time, the second optical detection group detects the radial direction of the 8-shaped optical cable to realize the detection of the surface profiles of the load-bearing part and the cable core part, and ensures the accuracy of the radial dimensions of the 8-shaped optical cable; the first optical detection group and the second optical detection group cooperate to fully expose the surface defects of the 8-shaped optical cable, so as to realize the comprehensive detection of the surface of the 8-shaped optical cable.

[0017] (2) The 8-shaped optical cable vision detection system based on structured light of the present invention realizes the comprehensive circumferential detection of the 8-shaped optical cable by respectively arranging two side optical detection units on both sides of the 8-shaped optical cable; at the same time, by arranging the first side light receiving component and the second side light receiving component on both sides of the 8-shaped optical cable respectively, the surface defects of the 8-shaped optical cable are detected by the reflected light received by the first side light receiving component, and the contour of the 8-shaped optical cable is determined by the direct light received by the second side light receiving component, avoiding misjudgment of surface bulges of the 8-shaped optical cable caused by light blocking during the shaking process of the 8-shaped optical cable, and ensuring the detection accuracy of the vision detection system.

[0018] (3) The 8-shaped optical cable vision detection system based on structured light of the present invention sets the first side light emitting component and the first side light receiving component at intervals along the first direction, so that the light is emitted and received at an inclined angle. When a bulge appears on the surface of the 8-shaped optical cable, the light emitted by the first side light emitting component is blocked correspondingly, resulting in the first side light receiving component being unable to receive light or having a large light offset, so as to realize the accurate detection of the surface bulge of the 8-shaped optical cable.

[0019] (4)The 8-shaped optical cable vision detection system based on structured light of the present invention exposes hidden defects in each part of the 8-shaped optical cable by setting the first side light emission component for the luminous intensity of each part of the 8-shaped optical cable, so as to avoid the occlusion of the connection part by the external shape shadows of the load-bearing part and the cable core part. By enhancing the illumination intensity at the connection part, the stable identification of surface defects of the 8-shaped optical cable is realized. At the same time, the present application additionally sets a light-emitting part at the junction of the load-bearing part and the connection part, and at the junction of the cable core part and the connection part, so as to enhance the identification and judgment of the position where the connection part is located, and to stably identify the defects on the outer surface of the 8-shaped optical cable. Description of the Drawings

[0020] Figure 1 is the overall structural schematic diagram of the 8-shaped optical cable vision detection system based on structured light in the embodiment of the present invention; Figure 2 is the overall structural schematic diagram of the first optical detection group in the embodiment of the present invention; Figure 3 is the spectrogram obtained by the first side light receiving component of the optical cable to be measured in the stable and jitter states in the embodiment of the present invention; Figure 4 is the spectrogram obtained by the second side light receiving component of the optical cable to be measured in the stable and jitter states in the embodiment of the present invention.

[0021] In all the drawings, the same reference numerals represent the same technical features, specifically: 1. First optical detection group; 2. Second optical detection group; 101. First side light emission component; 102. First side light receiving component; 103. Second side light receiving component. Detailed Embodiment

[0022] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0023] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0024] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0025] In the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0027] Embodiment: Please refer to Figures 1 to 4, in the preferred embodiment of the present invention, the 8-shaped optical cable vision detection system based on structured light includes a first optical detection group 1 arranged along a first direction. The first optical detection group 1 is used to emit and receive linear light along the axial side of the 8-shaped optical cable, and the linear light at least partially covers the load-bearing part, connection part, and cable core part of the 8-shaped optical cable; and includes a second optical detection group 2 arranged along a second direction. The second optical detection group 2 is used to emit and receive planar light along the radial direction of the 8-shaped optical cable, and the planar light at least partially covers the load-bearing part and cable part of the 8-shaped optical cable. At the same time, the first optical detection group 1 and the second optical detection group 2 cooperate to cover the radial area of the 8-shaped optical cable.

[0028] For the 8-shaped optical cable vision detection system based on structured light in this application, it linearly detects the axial side of the 8-shaped optical cable through the first optical detection group 1 to scan the side surface of the 8-shaped optical cable (the surface where the load-bearing part, connection part, and cable core part are located) for defect analysis of the surface of the 8-shaped optical cable. At the same time, the planar light emitted by the second optical detection group 2 here can fully obtain the contours of the load-bearing part and cable core part. When the optical cable jitters along the direction perpendicular to the connection part, the second optical detection group 2 can fully obtain the jitter condition and surface information of the 8-shaped optical cable to supplement the detection results of the first optical detection group 1 and achieve a comprehensive detection of the surface of the 8-shaped optical cable.

[0029] Preferably, the first direction in this application refers to the axial direction of the 8-shaped optical cable, and the second direction in this application refers to any direction in the radial direction of the 8-shaped optical cable. At the same time, both the first optical detection group 1 and the second optical detection group 2 have a certain length and thickness, and their combined use can achieve a comprehensive detection of the surface of the 8-shaped optical cable. At the same time, the radial area of the 8-shaped optical cable in this application refers to the circumferential area along the radial direction of the 8-shaped optical cable, and a comprehensive detection of the surface of the 8-shaped optical cable is achieved through the cooperation of the first optical detection group 1 and the second optical detection group 2.

[0030] Preferably, the load-bearing part of the 8-shaped optical cable in this application includes a load-bearing structure formed by twisting multiple steel strands or FRP rods, which is externally coated with an outer sheath. The connection part is a sling structure for connecting the load-bearing part and the cable core, and the cable core part is the main part of the optical cable, and its internal parts include optical fibers, sleeves, water-blocking yarns, armor structures, etc.

[0031] Further, as a preferred embodiment of the present invention, the first optical detection group 1 in the present application includes two pairs of side optical detection units arranged in pairs, and the two side optical detection units are respectively arranged on both sides of the connection part of the figure-eight optical cable for comprehensively detecting both sides of the figure-eight optical cable. Specifically, the two side optical detection units include a first side light-emitting component 101, a first side light-receiving component 102, and a second side light-receiving component 103; wherein the first side light-emitting component 101 and the first side light-receiving component 102 are arranged on one side (the same side) of the connection part, and the second side light-receiving component 103 is arranged on the side of the connection part away from the first side light-receiving component 102. The first side light-receiving component 102 is used to receive the light emitted by the first side light-emitting component 101, and by the reflection of the light on the surface of the figure-eight optical cable, the accurate identification of the surface defects of the figure-eight optical cable is realized. At the same time, the light emitted from the first side light-emitting component 101 can cover the side of the figure-eight optical cable. In order to realize the accurate identification of the contour of the figure-eight optical cable, the second side light-receiving component 103 is correspondingly arranged in the present application, which is used to receive the light outside the contour of the figure-eight optical cable, so as to avoid misjudgment of the information received by the first side light-receiving component 102 caused by the shaking of the figure-eight optical cable during the detection process, so as to realize the accurate identification of the contour of the figure-eight optical cable, so as to accurately analyze whether the signal change received by the first side light-receiving component 102 is caused by a surface bulge or the shaking of the optical cable.

[0032] Correspondingly, the two side optical detection units in the present application are arranged at intervals along the first direction. The first side light-emitting component 101 in the present application will emit light from one side of the figure-eight optical cable to the other side. In order to avoid the mutual interference of the light emitted between the two side optical detection units, the present application arranges the two along the first direction at intervals, and only needs to ensure that the two side optical detection units are combined to realize the comprehensive detection of the outer surface of the figure-eight optical cable.

[0033] Further, as a preferred embodiment of the present invention, the first side light-emitting component 101 and the first side light-receiving component 102 in the present application are arranged at intervals along the first direction. When the first side light-emitting component 101 and the first side light-receiving component 102 are arranged at intervals along the first direction, the light emitted by the first side light-emitting component 101 is also emitted obliquely. When a bulge appears on the surface of the figure-eight optical cable, the light emitted by the first side light-emitting component 101 is blocked correspondingly, resulting in the first side light-receiving component 102 being unable to receive light or the offset of the light being amplified, so as to realize the accurate detection of the surface bulge of the figure-eight optical cable.

[0034] Further, as a preferred embodiment of the present invention, the first side light-emitting component 101 in the present application includes a first light-emitting portion, a second light-emitting portion, and a third light-emitting portion arranged in sequence along the second direction. The light-emitting port of the first light-emitting portion faces the load-bearing portion, the light-emitting port of the second light-emitting portion faces the connecting portion, the light-emitting port of the third light-emitting portion faces the cable core portion, and the light intensity of the second light-emitting portion is greater than that of the first light-emitting portion and the third light-emitting portion. When identifying the surface of the figure-eight optical cable, since the thickness of the connecting portion is much lower than the diameters of the load-bearing portion and the cable core portion, the load-bearing portion, the connecting portion, and the cable core portion form a shape of bulge, depression, and bulge. When light with the same light intensity irradiates the surfaces of the load-bearing portion, the connecting portion, and the cable core portion, a shadow will be formed on the surface of the connecting portion, resulting in color difference in the light received by the first side light-receiving component 102 and affecting the identification of bulges on the surfaces of the load-bearing portion, the connecting portion, and the cable core portion.

[0035] Further, as another preferred embodiment of the present invention, the first side light-emitting component 101 in the present application includes a first light-emitting portion, a second light-emitting portion, a third light-emitting portion, a fourth light-emitting portion, and a fifth light-emitting portion arranged in sequence along the second direction; wherein, the first light-emitting portion corresponds to the load-bearing portion, the second light-emitting portion corresponds to the joint area between the load-bearing portion and the connecting portion, the third light-emitting portion corresponds to the connecting portion, the fourth light-emitting portion corresponds to the joint area between the connecting portion and the cable core portion, and the fifth light-emitting portion corresponds to the cable core portion. At the same time, the luminous powers of the first light-emitting portion and the fifth light-emitting portion are the same, the luminous powers of the second light-emitting portion and the fourth light-emitting portion are the same, and the luminous power of the third light-emitting portion is greater than that of the first light-emitting portion, the second light-emitting portion, the fourth light-emitting portion, and the fifth light-emitting portion. As described above, the angles of the light emitted by the first side light-emitting component 101 are the same, and shadows are likely to appear in the joint areas between the load-bearing portion and the connecting portion, and between the connecting portion and the cable core portion, which will affect the identification of bulges on the surface of the figure-eight optical cable. In the present application, the second light-emitting portion is provided in the joint area between the load-bearing portion and the connecting portion, and the fourth light-emitting portion is provided in the joint area between the connecting portion and the cable core portion. By separately irradiating the shaded parts of the connecting part with the two emitting light alone, accurate identification of the surface of the figure-eight optical cable can be achieved.

[0036] Preferably, the light emitted by the first light-emitting portion in the present application is purple light, the light emitted by the second light-emitting portion is red light, the light emitted by the third light-emitting portion is yellow light, the light emitted by the fourth light-emitting portion is green light, and the light emitted by the fifth light-emitting portion is blue light. The intensities of the purple light and the blue light are basically the same, the intensities of the red light and the green light are basically the same, and the intensity of the yellow light is the highest. By comparing the light intensity received by the first side light-receiving component 102 with the light intensity emitted by the first side light-emitting component 101, defect detection on the surface of the figure-eight optical cable can be achieved. When the figure-eight optical cable shakes along the extending direction of the connecting portion, the spectrum received by the first side light-receiving component 102 will shift correspondingly, such as Figure 3As shown, the jitter condition of the figure-eight optical cable can be accurately obtained through spectral shift.

[0037] Furthermore, as a preferred embodiment of the present invention, in this application, the second optical detection group 2 includes two pairs of arranged planar optical detection units. The two planar optical detection units are respectively arranged at both ends of the connection part, and the light outlet of one of the planar optical detection units is arranged towards the load-bearing part, and the light outlet of the other planar optical detection unit is arranged towards the cable core part.

[0038] Furthermore, this application also includes a method for detecting surface defects of a figure-eight optical cable, which is realized based on a vision detection system for figure-eight optical cables using structured light, and includes the following steps: Arrange the optical cable to be measured. The first optical detection group 1 obtains the first standard received spectrum of the optical cable to be measured, and the second optical detection group 2 obtains the second standard received spectrum of the optical cable to be measured; Traction the optical cable to be measured. The first optical detection group 1 obtains the first received spectrum of the first surface of the optical cable to be measured, and the second optical detection group 2 obtains the second received spectrum of the second surface of the optical cable to be measured; Compare the first received spectrum with the first standard received spectrum to obtain the surface defect condition of the first surface of the optical cable to be measured. Compare the second received spectrum with the second standard received spectrum to obtain the surface defect condition of the second surface of the optical cable to be measured.

[0039] Specifically, in this application, the first surface refers to the side surface of the figure-eight optical cable that includes the load-bearing part, the connection part, and the cable core part; the second surface refers to the surface of the load-bearing part and the cable core part in the same direction as the extension direction of the connection part. And, since this application needs to detect the continuous cross-section defects on the surface of the figure-eight optical cable, the received spectrum in this application is the corresponding curve of the surface position and the received light intensity. By comparing the magnitudes of the light intensities received at the corresponding positions, the surface defects at the corresponding points are identified and judged.

[0040] Furthermore, the specific process of the first optical detection group 1 in this application for obtaining the first received spectrum of the first surface of the optical cable to be measured includes: Arrange the optical cable to be measured in a standard state. The second side light receiving component 103 receives the light emitted by the first side light emitting component 101 of the optical cable to be measured in the standard state, and set it as the third standard received spectrum; the first side light receiving component 102 receives the light emitted by the first side light emitting component 101 of the optical cable to be measured in the standard state, and set it as the fourth standard received spectrum; The second side light receiving component 103 receives the light emitted by the first side light emitting component 101, and set it as the third received spectrum, and compare the third received spectrum with the third standard received spectrum; When the difference between the third received spectrum and the third standard received spectrum is within the set threshold, the light received by the first side light receiving component 102 is set as the fourth received spectrum, and the fourth received spectrum is compared with the fourth standard received spectrum to obtain the first surface defect condition of the optical cable to be tested; When the difference between the third received spectrum and the third standard received light intensity spectrum is greater than the set threshold, the position of the optical cable to be tested is offset. Adjust the fourth received spectrum to the fifth received spectrum, and compare the fifth received spectrum with the fourth standard received spectrum to obtain the first surface defect condition of the optical cable to be tested.

[0041] This application mainly determines whether the optical cable to be tested shakes through the third received spectrum information received by the second side light receiving component 103. When the optical cable does not shake significantly, the fourth spectrum information received by the first side light receiving component 102 is the actual condition of the surface of the optical cable, and the surface bulge condition of the corresponding part can be judged accordingly; when the optical cable shakes significantly, the fourth received spectrum information received by the first side light receiving component 102 is correspondingly offset. At this time, the fourth received spectrum needs to be adjusted correspondingly to correspond to the position on the fourth standard received spectrum to achieve accurate detection of the surface of the optical cable to be tested.

[0042] It should be noted that the detection of the surface defects of the core part of the figure-eight optical cable is the most stringent, which is related to the protection effect of the sheath on the internal optical fiber. Therefore, the surface defect degree standards of the load-bearing part, connection part and core part of the figure-eight optical cable are different. When the figure-eight optical cable shakes, the detection results are also correspondingly offset. Therefore, the detection results need to be corrected (adjust the fourth received spectrum to the fifth received spectrum) to achieve accurate detection of the surface of the optical cable to be tested.

[0043] Furthermore, as Figure 3 、 Figure 4 shown, when the fourth received spectrum in this application is adjusted to the fifth received spectrum, it obtains the displacement deviation between the third received spectrum and the third standard received spectrum (the displacement deviation of the optical cable to be tested along the shaking direction), and then correspondingly adjusts the displacement deviation of the fourth received spectrum (the receiving position of the first side light receiving component 102 is adjusted along the X direction) to convert the fourth received spectrum into the fifth received spectrum.

[0044] Those skilled in the art can easily understand that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. An 8-shaped optical cable vision inspection system based on structured light, characterized in that, include: A first optical detection group arranged along a first direction, the first optical detection group is used to emit and receive linear light along the axial side of the figure-8 optical cable, the linear light at least partially covering the load-bearing part, the connecting part and the cable core part of the figure-8 optical cable; A second optical detection group arranged along a second direction, the second optical detection group being used to emit and receive planar light along a radial direction of the figure-8 optical cable, the planar light at least partially covering a load-bearing portion and a cable portion of the figure-8 optical cable; And the first optical detection group and the second optical detection group cooperate to cover the radial area of ​​the figure-8 optical cable.

2. The 8-shaped optical cable vision detection system based on structured light according to claim 1, characterized in that The first optical detection group includes two side optical detection units arranged in pairs; The two side optical detection units are respectively arranged on both sides of the connection part of the 8-shaped optical cable, and the two side optical detection units each include a first side light emitting component, a first side light receiving component, and a second side light receiving component; The first side light emitting component and the first side light receiving component are arranged on one side of the connecting portion, and the second side light receiving component is arranged on a side of the connecting portion away from the first side light receiving component.

3. The 8-shaped optical cable vision detection system based on structured light according to claim 2, wherein The two side optical detection units are arranged at intervals along the first direction.

4. The structured light-based figure-eight optical cable vision inspection system according to claim 2 or 3, characterized in that, The first side light emitting component and the first side light receiving component are arranged at intervals along a first direction.

5. The 8-shaped optical cable vision detection system based on structured light according to any one of claims 1 to 3, characterized in that, The first side light emitting assembly includes a first light emitting portion, a second light emitting portion and a third light emitting portion arranged in sequence along the second direction, a light outlet of the first light emitting portion is arranged toward the load-bearing portion, a light outlet of the second light emitting portion is arranged toward the connecting portion, a light outlet of the third light emitting portion is arranged toward the cable core portion, and the light intensity emitted by the second light emitting portion is greater than the light intensity emitted by the first light emitting portion and the third light emitting portion.

6. The structured light-based figure-eight optical cable vision inspection system according to any one of claims 1 to 3, characterized in that The first side light emitting assembly includes a first light emitting portion, a second light emitting portion, a third light emitting portion, a fourth light emitting portion and a fifth light emitting portion arranged in sequence along the second direction; Wherein, the first light-emitting part is arranged corresponding to the load-bearing part, the second light-emitting part is arranged corresponding to the connecting area between the load-bearing part and the connecting part, the third light-emitting part is arranged corresponding to the connecting part, the fourth light-emitting part is arranged corresponding to the connecting area between the connecting part and the cable core part, and the fifth light-emitting part is arranged corresponding to the cable core part; The luminous power of the first light-emitting unit is the same as that of the fifth light-emitting unit, the luminous power of the second light-emitting unit is the same as that of the fourth light-emitting unit, and the luminous power of the third light-emitting unit is greater than the luminous power of the first light-emitting unit, the second light-emitting unit, the fourth light-emitting unit and the fifth light-emitting unit.

7. The structured light based figure-eight optical cable vision inspection system according to any one of claims 1 to 3, characterized in that, The second optical detection group includes two paired format optical detection units, which are arranged along both ends of the connecting part, respectively, and a light outlet of one of the format optical detection units is arranged toward the load-bearing part, and a light outlet of the other format optical detection unit is arranged toward the cable core part.

8. A method for detecting surface defects of an 8-shaped optical cable, characterized in that, The steps include: Arrange the optical cable to be tested, the first optical detection group obtains a first standard receiving spectrum of the optical cable to be tested, and the second optical detection group obtains a second standard receiving spectrum of the optical cable to be tested; Traction is applied to the optical cable under test. The first optical detection group obtains the first received spectrum of the first surface of the optical cable under test, and the second optical detection group obtains the second received spectrum of the second surface of the optical cable under test; Compare the first received spectrum with the first standard received spectrum to obtain the defect condition of the first surface of the optical cable under test. Compare the second received spectrum with the second standard received spectrum to obtain the defect condition of the second surface of the optical cable under test.

9. The method for detecting surface defects of an 8-shaped optical cable according to claim 8, wherein, The first optical detection group includes two pairs of side optical detection units arranged opposite to each other. Both of the side optical detection units include a first side light emission component, a first side light receiving component, and a second side light receiving component; The specific process by which the first optical detection component obtains the first received spectrum of the first surface of the optical cable under test is as follows: Arrange the optical cable under test in a standard state. The second side light receiving component receives the light emitted by the first side light emission component of the optical cable under test in the standard state and designates it as the third standard received spectrum. The first side light receiving component receives the light emitted by the first side light emission component of the optical cable under test in the standard state and designates it as the fourth standard received spectrum; The second side light receiving component receives the light emitted by the first side light emission component and designates it as the third received spectrum. Compare the third received spectrum with the third standard received spectrum; When the difference between the third received spectrum and the third standard received spectrum is within the set threshold, designate the light received by the first side light receiving component as the fourth received spectrum. Compare the fourth received spectrum with the fourth standard received spectrum to obtain the defect condition of the first surface of the optical cable under test; When the difference between the third received spectrum and the third standard received light intensity spectrum is greater than the set threshold, the position of the optical cable under test has shifted. Adjust the fourth received spectrum to the fifth received spectrum. Compare the fifth received spectrum with the fourth standard received spectrum to obtain the defect condition of the first surface of the optical cable under test.

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