CN114136756B - Optical cable foaming filling rope surface defect detection method and production detection system - Google Patents
Optical cable foaming filling rope surface defect detection method and production detection system Download PDFInfo
- Publication number
- CN114136756B CN114136756B CN202111347002.4A CN202111347002A CN114136756B CN 114136756 B CN114136756 B CN 114136756B CN 202111347002 A CN202111347002 A CN 202111347002A CN 114136756 B CN114136756 B CN 114136756B
- Authority
- CN
- China
- Prior art keywords
- filling rope
- optical cable
- foaming filling
- optical
- detection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 414
- 238000011049 filling Methods 0.000 title claims abstract description 268
- 238000005187 foaming Methods 0.000 title claims abstract description 262
- 238000001514 detection method Methods 0.000 title claims abstract description 134
- 230000007547 defect Effects 0.000 title claims abstract description 81
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 239000000523 sample Substances 0.000 claims abstract description 90
- 238000000034 method Methods 0.000 claims abstract description 79
- 230000003321 amplification Effects 0.000 claims abstract description 14
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims description 45
- -1 polyethylene Polymers 0.000 claims description 32
- 239000004698 Polyethylene Substances 0.000 claims description 31
- 229920000573 polyethylene Polymers 0.000 claims description 31
- 239000011148 porous material Substances 0.000 claims description 31
- 238000001125 extrusion Methods 0.000 claims description 28
- 239000000498 cooling water Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 11
- 238000007493 shaping process Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 45
- 230000005540 biological transmission Effects 0.000 description 15
- 230000006872 improvement Effects 0.000 description 10
- 238000002310 reflectometry Methods 0.000 description 7
- 239000000945 filler Substances 0.000 description 5
- 238000004804 winding Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 239000013307 optical fiber Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000002427 irreversible effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- 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
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
The invention discloses a method for detecting surface defects of an optical cable foaming filling rope and a production detection system, which belong to the technical field of optical cable detection and specifically comprise the following steps: and (3) preliminary detection: performing preliminary detection on the surface of the optical cable foaming filling rope by adopting an optical probe; defect amplification: stretching the optical cable foaming filling rope passing through the optical probe detection part by adopting a tension wheel; and (3) secondary detection: and (5) performing secondary detection on the stretched optical cable foaming filling rope by adopting an optical probe. According to the method for detecting the surface defects of the optical cable foaming filling rope, the optical detection and the stretching detection are combined, so that the surface defects of the optical cable foaming filling rope are amplified after the optical cable foaming filling rope is stretched, the surface defects of the optical cable foaming filling rope are detected more easily in a secondary detection procedure, the defect detection efficiency of the optical cable foaming filling rope is greatly improved, and the use energy consumption of the optical detection is reduced.
Description
Technical Field
The invention belongs to the technical field of optical cable detection, and particularly relates to an optical cable foaming filling rope surface defect detection method and a production detection system.
Background
Fiber optic cables are manufactured to meet optical, mechanical, or environmental performance specifications using one or more optical fibers disposed in a covering sheath as a transmission medium and may be used alone or in groups of communication cable assemblies.
With the continuous development of the communication industry, demands of consumers for communication are also increasing, and optical cables are also supplied from centralized information to personalized information. The inside a plurality of sleeve structures that have usually been held of conventional optical cable, its inside optical cable quantity that holds is more, in the regional to individual family or villa type, its individual demand is lower, and in order to guarantee the whole even atress of optical cable, the inside sleeve structure of optical cable is many generally, and around the inside enhancement core circumference arrangement of optical cable, each sleeve is mutual spiral winding, with this formation comparatively stable layer hank structure, can not cause inside sleeve to extrude each other or the flat scheduling problem of buckling because of external environment's pressure etc. for this reason, single optical cable is inside usually to need place many sleeve structures, this also has caused the optical cable when butt joint individual or less user crowd, its optical cable utilization ratio is not high, cause the problem of inside optic fibre a large amount of waste.
In the prior art, a filling rope structure is designed aiming at the defects, and the filling rope is used for replacing part of the sleeve structure in the optical cable, so that the condition of the utilization rate of the optical fiber is reduced. The existing filling ropes mostly adopt foaming type filling ropes, and the whole filling ropes have the characteristics of light weight, attractive appearance, difficult adhesion with a sheath, easy stripping and the like. To this end, a method for detecting surface defects of a foamed filler rope for an optical cable is provided to ensure quality of the filler rope for the inside of the optical cable.
Disclosure of Invention
In response to one or more of the above-mentioned deficiencies or improvements in the prior art, the present invention provides a method and a system for detecting surface defects of an optical fiber cable foam filling rope.
In order to achieve the above purpose, the invention provides a method for detecting surface defects of an optical cable foaming filling rope, which comprises the following steps:
and (3) preliminary detection: performing primary optical detection on the surface of the foaming filling rope of the optical cable;
defect amplification: stretching the optical cable foaming filling rope after primary optical detection;
and (3) secondary detection: and carrying out secondary optical detection on the stretched optical cable foaming filling rope.
As a further improvement of the invention, the preliminary detection process further comprises a stabilization process, which specifically comprises the following steps:
the anti-shake device is arranged to limit the periphery of the optical cable foaming filling rope, so that the optical cable foaming filling rope is continuously and stably conveyed to the primary detection procedure.
As a further improvement of the invention, the optical cable foaming filling rope is conveyed to the preliminary detection process in a spiral tracing mode, the rotation speed of the optical cable foaming filling rope is 10rad/min, and the conveying speed of the optical cable foaming filling rope is 200-300 m/min.
As a further improvement of the invention, the preliminary detection specifically comprises the steps of:
setting an optical probe to emit optical pulses to the surface of the optical cable foaming filling rope, and setting a signal receiving device to receive the optical pulses reflected from the surface of the optical cable foaming filling rope;
judging whether the surface of the optical cable foaming filling rope has a pore defect or not through the intensity comparison before and after optical pulse reflection;
if the ratio of the intensity of the optical pulse after reflection to the intensity of the optical pulse before reflection is 20+/-2%, the detection part is indicated to have no pore defect; if the strength ratio is 4.+ -. 1%, the surface detection portion has void defects.
As a further improvement of the invention, the frequency of the optical pulse emitted by the optical probe in the preliminary detection is 5-10 HZ.
As a further improvement of the present invention, the defect amplifying process specifically includes the steps of:
and the tension wheel is arranged to stretch the cable foaming filling rope, and the traction force of the tension wheel is controlled to be 20N-30N, so that the amplification rate of the pores on the cable foaming filling rope reaches 400% -500%.
As a further improvement of the present invention, the secondary detection specifically includes the steps of:
setting an optical probe to carry out secondary detection on the surface of the towed optical cable foaming filling rope, adjusting the setting distance between the optical probe and the tension wheel, and enabling the distance between the optical probe and the tension wheel to be between 0.2m and 0.4m, so that when the optical probe detects to carry out secondary detection, the amplification ratio of the pore space on the optical cable foaming filling rope is stabilized between 400% and 500%.
As a further improvement of the invention, the secondary detection further comprises a traction process and a wire winding process.
As a further improvement of the present invention, the optical cable foaming filling rope for detecting the defect detecting method is prepared by the following steps:
arranging an extrusion device to extrude and shape the foamed polyethylene;
a PBT extrusion molding device is arranged to cover a PBT film on the surface of extruded foaming polyethylene;
performing water cooling shaping on the foamed polyethylene coated with the PBT film to obtain an optical cable foaming filling rope;
and removing the water on the surface of the optical cable foaming filling rope after water cooling shaping to obtain the optical cable foaming filling rope to be detected.
The invention also comprises an optical cable foaming filling rope production detection system which comprises an optical cable foaming filling rope extrusion module, an optical cable foaming filling rope detection module and an optical cable foaming filling rope collection module which are sequentially arranged; wherein,
the optical cable foaming filling rope extrusion module comprises a foaming material extrusion molding device, a PBT extrusion molding device, a cooling water tank and a dryer which are sequentially arranged; the PBT extrusion molding device is arranged above the discharge port of the foaming material extrusion molding device and is used for uniformly coating PBT on the periphery of the foaming polyethylene; the cooling water tank is arranged behind the discharge port of the foaming material extrusion molding device, and the air outlet of the blow dryer is opposite to the discharge port of the cooling water tank;
the optical cable foaming filling rope detection module is arranged at the rear end of the air outlet and is used for detecting the optical cable foaming filling rope after being dried by the dryer; the optical cable foaming filling rope detection module comprises a first optical probe, a tension pulley and a second optical probe which are sequentially arranged; the tension pulley is arranged on an extension line of the optical cable foaming filling rope and is used for stretching the optical cable foaming filling rope; the first optical probe and the second optical probe are respectively arranged above the optical cable foaming filling rope, the first optical probe is positioned at the front end of the tension wheel and used for detecting the surface of the optical cable foaming filling rope before stretching, and the second optical probe is positioned at the rear end of the tension wheel and used for detecting the surface of the optical cable foaming filling rope after stretching;
the optical cable foaming filling rope collecting module comprises a traction device and a take-up roller which are sequentially arranged, wherein the traction device is used for traction of the optical cable foaming filling rope after detection by the second optical probe, and the take-up roller is arranged at the wire outlet end of the traction device and used for collecting and storing the optical cable foaming filling rope after detection.
The above-mentioned improved technical features can be combined with each other as long as they do not collide with each other.
In general, the above technical solutions conceived by the present invention have the beneficial effects compared with the prior art including:
(1) According to the method for detecting the surface defects of the optical cable foaming filling rope, the optical detection and the stretching detection are combined, so that the surface defects of the optical cable foaming filling rope are amplified after the optical cable foaming filling rope is stretched, and the surface defects of the optical cable foaming filling rope are detected more easily in a secondary detection process; meanwhile, the defect amplification working procedure is adopted, so that the optical detection in the primary detection and the secondary detection can be reduced in frequency or the detection rate of the optical cable foaming filling rope can be accelerated appropriately, and as long as the amplified defects can be detected in the secondary optical detection process, whether the defects exist on the surface of the optical cable foaming filling rope can be judged, the defect detection efficiency of the optical cable foaming filling rope is greatly improved, and the use energy consumption of the optical detection is reduced.
(2) The method for detecting the surface defects of the optical cable foaming filling rope can be directly used for detecting the defects of the optical cable foaming filling rope after extrusion molding, and correspondingly lengthening the cooling section in the optical cable foaming filling rope extrusion molding process so as to avoid the problem of permanent deformation of the optical cable foaming filling rope in the stretching process, and correspondingly arranging a blow dryer so as to remove the water on the surface of the optical cable foaming filling rope after cooling, so that the water on the surface of the optical cable foaming filling rope interferes with the optical probe to optically detect the surface of the optical cable foaming filling rope, and the problem of insufficient stretching and stretch breakage in the stretching process caused by unstable conveying of the optical cable foaming filling rope is avoided.
(3) According to the method for detecting the surface defects of the optical cable foaming filling rope, disclosed by the invention, the defects on the optical cable foaming filling rope are easier to detect by the optical probes through the matched detection of the two optical probes and the amplification of the broken holes of the tension wheel pair, and secondly, the second optical probe is easier to detect the amplified hole defects, so that the detection frequency of the optical probe and the conveying efficiency of the optical cable foaming filling rope can be properly adjusted according to actual requirements, and the operation load of each device in the defect detection procedure is reduced as much as possible under the condition that the defects after amplification can be detected, and the detection efficiency is increased.
Drawings
FIG. 1 is a schematic diagram of the overall arrangement of a system for producing and detecting surface defects of a foamed filler rope for an optical cable in accordance with an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
Examples:
in the process of detecting the optical cable foaming filling rope, the optical cable foaming filling rope has the characteristics of good strength, difficult adhesion with a sheath, easy stripping and the like, and is related to the preparation process of the optical cable foaming filling rope, the optical cable foaming filling rope is prepared from foamed polyethylene, and when the optical cable foaming filling rope is coated in an optical cable, the optical cable foaming filling rope is extremely easy to adhere to the polyethylene in the sheath forming process outside the optical cable, so that the stripping problem of the optical cable foaming filling rope in the later stage is caused. For this reason, the surface of the optical cable foaming filling rope is usually further provided with a layer of polybutylene terephthalate (PBT) film, and the PBT film itself has the problems of high heat resistance, toughness, fatigue resistance, self lubrication, low friction coefficient, low water absorption and the like, so that after the foaming polyethylene surface is coated with the layer of PBT film, the whole optical cable foaming filling rope can be completely separated from the sheath, and can be directly peeled from the cable in the later peeling process. While in the process of filling, we found that the cable foaming filling rope coated with the PBT film was filled in the process of filling the cable, the cable foaming filling rope still had a partial area adhered to the cable, which could seriously affect the subsequent cable stripping process.
The main reason for the adhesion of the foamed filler rope of the optical cable to the jacket portion is the problem of cracking of the PBT film itself, which results in a lower yield of the optical cable with the foamed filler rope of the optical cable. And the film itself has smaller pores, and can not be identified by naked eyes or the like, so that the problem of rupture of the film surface is not detected in a better mode in the prior art.
Aiming at the problems, the application provides a method for detecting the surface defects of the optical cable foaming filling rope, which is used for solving the problem that the surface pores of the existing optical cable foaming filling rope are difficult to detect.
The method for detecting the surface defects of the optical cable foaming filling rope specifically comprises the following steps:
and (3) preliminary detection: performing preliminary detection on the surface of the optical cable foaming filling rope by adopting an optical probe;
defect amplification: stretching the optical cable foaming filling rope passing through the optical probe detection part by adopting a tension wheel;
and (3) secondary detection: and (5) performing secondary detection on the stretched optical cable foaming filling rope by adopting an optical probe.
Further, as a preferred embodiment of the invention, the detection of the surface defects of the optical cable foaming filling rope in the application can be directly used for detecting the optical cable foaming filling rope after the preparation is completed, so that the problem of secondary detection after the subsequent optical cable foaming filling rope is completely prepared and stored is avoided. Specifically, the preparation process of the optical cable foaming filling rope comprises the following steps:
extruding and molding a foamed polyethylene filling rope by adopting a foaming material extruding machine, arranging a PBT extruding machine at the extruding end of the foamed polyethylene filling rope, and uniformly coating a layer of PBT film on the surface of the foamed polyethylene filling rope by the PBT extruding machine; and arranging a cooling water tank on the extending path of the foamed polyethylene filling rope, performing a water cooling process on the foamed polyethylene filling rope coated with the PBT film, and performing a subsequent defect detection process on the optical cable foamed filling rope after water cooling.
In the conventional process of preparing the foamed polyethylene filling rope, although the water cooling process is also needed for the foamed polyethylene filling rope coated with the PBT film, in order to save the occupied area of the whole production line, the length of the cooling water tank can be shaped in a mode of subsequent air cooling or natural cooling and the like without being equal to that of the cooling water tank in the application. However, the optical cable foaming filling rope prepared in the application needs to be subjected to a subsequent stretching detection procedure, irreversible extension conditions easily occur in the stretching procedure process of the uncooled and shaped optical cable foaming filling rope, the detected optical cable foaming filling rope cannot meet the set diameter requirement, and the optical cable foaming filling rope is unqualified in preparation. Therefore, the cooling water tank needs to be prolonged, so that the complete shaping of the optical cable foaming filling rope cooled by the cooling water tank is ensured, and the problems of irreversible elongation, thinning and the like in the subsequent stretching process are avoided.
Further, as an optional embodiment of the present invention, the optical cable foaming filling rope prepared and cooled in the present application further includes the following processing steps:
removing water on the surface of the foaming filling rope of the optical cable: and a dryer is arranged at the output end of the cooling water tank, and the surface of the optical cable foaming filling rope is air-dried to remove water through the dryer, so that the situation that water drops cover the surface or the damaged part of the optical cable foaming filling rope to cause optical detection errors in the detection process of the surface defects of the optical cable foaming filling rope is avoided.
And (3) an optical cable foaming filling rope transmission stabilization procedure: the front end of the optical probe is provided with an anti-shake device, and the periphery of the optical cable foaming filling rope is limited through the anti-shake device, so that the optical cable foaming filling rope is continuously and stably subjected to a detection procedure in the subsequent detection process. The optical cable foaming filling rope is limited through the anti-shake procedure, so that the tension pulley is in a balanced stretching state in the stretching process of the optical cable foaming filling rope, and the situation that the optical cable foaming filling rope is not uniformly stretched and the stretching degree of the optical cable foaming filling rope is excessively large and irreversibly recovered due to shake or unstable supply of the optical cable foaming filling rope in the stretching process of the tension pulley is avoided; meanwhile, the anti-shake procedure enables the optical probe to continuously and uniformly detect the surface of the optical cable foaming filling rope and avoid the problems of missing surface detection and the like caused by shake of the optical cable foaming filling rope when the optical cable foaming filling rope is subjected to optical detection.
Further, as a preferred embodiment of the present invention, the preliminary detection steps in the present application are specifically as follows:
step one: and conveying the optical cable foaming filling rope in a spiral feeding mode, sending optical pulses by an optical probe, receiving signals reflected by the surface of the optical cable foaming filling rope by a signal receiving device on the optical probe, and judging whether the surface of the filling rope has pore defects or not. When the optical pulse irradiates the surface of the optical cable foaming filling rope, the optical pulse irradiates the PBT film with higher reflectivity due to higher smoothness of the PBT film, and then the reflected optical pulse is received to judge whether the surface of the optical cable foaming filling rope has pore defects. When the surface of the optical cable foaming filling rope has no pore defect, the reflection degree of the optical pulse emitted by the optical probe is higher, the signal receiving device can receive the optical pulse, the loss degree of the optical pulse is about 80%, but the whole pulse signal has no loss. When the surface of the optical cable foaming filling rope has a pore defect, the optical pulse irradiates the pore part and can be absorbed by polyethylene, so that the reflectivity of the absorbed part is lower, the integral loss degree of a signal actually received by the signal receiving device part can reach more than 95%, and whether the optical cable foaming filling rope has loss is judged through the received signal.
The PBT film and the foamed polyethylene in the application are both composite modified materials, and certain differences exist between the actual refractive index of the PBT film and the refractive index of the pure polyethylene and the PBT, under the normal condition, the refractive index of air is calculated as 1, the actual refractive index of the foamed polyethylene used for the optical cable foaming filling rope in the application is about 1.5, and the refractive index of the PBT film is about 2.5. When the incidence angle of the optical pulse irradiated to the surface of the filling rope is close to 0 ℃, the reflectivity of light irradiated to the film from air is = ((n 2-n 1)/(n 2+ n 1)) # -2, therefore, the reflectivity of each optical pulse can be calculated according to the condition that the optical pulse is irradiated to the PBT film or the foamed polyethylene, and whether the PBT film at the detection part of the optical probe has defects or not can be judged according to the intensity of the received pulse. The specific calculation conditions are shown in the following table:
| refractive index of air | Refractive index of material | n2-n1 | n2+n1 | Reflectivity of | Reflectance rounding | Percent absorption | |
| PBT film | 1 | 2.55 | 1.55 | 3.55 | 0.190637 | 0.19 | 0.81 |
| PBT film | 1 | 2.65 | 1.65 | 3.65 | 0.204354 | 0.2 | 0.8 |
| PBT film | 1 | 2.75 | 1.75 | 3.75 | 0.217778 | 0.22 | 0.78 |
| Foamed polyethylene | 1 | 1.45 | 0.45 | 2.45 | 0.033736 | 0.03 | 0.97 |
| Foamed polyethylene | 1 | 1.5 | 0.5 | 2.5 | 0.04 | 0.04 | 0.96 |
| Foamed polyethylene | 1 | 1.55 | 0.55 | 2.55 | 0.046521 | 0.05 | 0.95 |
According to the calculation data of the embodiment, when the PBT film on the surface of the optical cable foaming filling rope is not damaged, the optical pulse irradiates the surface of the PBT film, the reflectivity of the optical pulse is about 20%, the signal intensity received by the signal receiving device is about 20+/-2% of the optical pulse emission intensity, the loss rate of the optical pulse is about 80%, and the ratio of the optical pulse intensity after reflection to the optical pulse intensity before reflection is about 1:5;
when the PBT film on the surface of the optical cable foaming filling rope is damaged, the optical pulse irradiates the foaming polyethylene, the reflectivity is only about 4+/-1%, the loss rate is about 96%, and the ratio of the intensity of the reflected optical pulse to the intensity of the reflected optical pulse is about 1:25; the signal intensity received by the signal receiving device can be used for judging whether the surface of the foaming filling rope of the optical cable is damaged.
The main purpose of conveying the optical cable foaming filling rope in a spiral feeding mode is to ensure that the optical probe can gradually detect the surface of the optical cable foaming filling rope along with spiral tracing of the optical cable foaming filling rope when transmitting optical pulses, so that the completeness of the surface detection of the optical cable foaming filling rope is ensured. As an alternative, the optical cable foaming filling rope in the present application may be transported in a straight line, and correspondingly, the optical probe and the signal receiving device need to rotate at a constant rate to ensure the detection of the circumference of the optical cable foaming filling rope. Preferably, in order to ensure that the signal receiving device can continuously and stably receive the reflected optical pulse, the optical probe is vertically arranged, so that the pulse on the optical probe can return to the optical probe according to the original path after being irradiated to the surface of the optical cable foaming filling rope, and then the signal is received and analyzed by the signal receiving device arranged at the optical probe.
Preferably, the rotation rate of the optical cable foaming filling rope is 10rad/min, the conveying rate of the optical cable foaming filling rope is 200-300 m/min, and the optical pulse emission frequency of the optical probe is 10HZ. In the conventional optical cable foaming filling rope detection process, a sampling inspection mode is adopted, and if no pore defect is found within 1m, the surface of the section of optical cable foaming filling rope is determined to be defect-free. The transmission frequency of the optical pulse is adjusted according to the extrusion speed of the optical cable foaming filling rope, and calculated with a high value, when the transmission speed of the optical cable foaming filling rope is 300m/min, the transmission gap of the optical pulse is 0.1s, the transmission distance of the optical pulse in one optical pulse transmission gap is 0.5m, namely the optical cable foaming filling rope in 1m is detected twice through the optical pulse, and if no pore defect is found in the two detections, the area is judged to have no pore defect. The rotation of the optical cable foaming filling rope is used for enabling the optical probe to conduct spiral detection on the surface of the optical cable foaming filling rope, and reliability and comprehensiveness of defect detection are guaranteed.
As an alternative embodiment, the rotation speed of the optical cable foaming filling rope is 10rad/min, the conveying speed of the optical cable foaming filling rope is 200-300 m/min, the optical pulse emission frequency of the optical probe is 5HZ, the surface defect of the optical cable foaming filling rope can still be detected through adjustment of the pulse frequency of the corresponding optical probe and limitation of the rotation speed of the optical cable foaming filling rope, and then the optical cable foaming filling rope is secondarily detected through a second optical probe, so that the surface detection sufficiency of the filling rope is ensured. Of course, under the condition of ensuring effective detection of the foaming filling rope of the optical cable within 1m, the optical pulse emission frequency of the optical probe can be realized above 5HZ, such as 6HZ, 8HZ, 15HZ, 20HZ or other emission frequencies.
Step two: judging whether the surface of the optical cable foaming filling rope has pores or not according to the detection information received by the optical probe, and if not, continuing the subsequent process; if the optical probe detection part is provided with holes, the holes are sent to the staff, the staff can mark the optical probe detection part in a manual interference mode, and the marked part is removed after the detection of the foaming filling rope of the optical cable is finished. Optionally, when the surface of the optical cable foaming filling rope is found to have pores, the optical cable foaming filling rope with the pore part can be manually cut off, and then the rest optical cable foaming filling rope is pulled to a wire collecting device in an auxiliary way, so that the subsequent wire collecting work can be conveniently unfolded.
Further, as a preferred embodiment of the present invention, the defect amplification process in the present application is specifically as follows:
the optical cable foaming filling rope passing through the optical probe detection part is stretched by the tension pulley, the traction force of the tension pulley is about 20N-30N, so that the stretching rate of the optical cable foaming filling rope in the extending direction is 100% -110%, the internal connection structure of the optical cable foaming filling rope under the stretching rate is not damaged, and the problem that the optical cable foaming filling rope cannot recover due to the stretching of the tension pulley is avoided. Meanwhile, when the surface of the PBT film has no defects, the stretching rate of the PBT film is the same as that of the foamed polyethylene filling rope, the surface of the foamed filling rope of the optical cable cannot be influenced after the foamed filling rope of the optical cable is stretched, and the detection process of the optical probe is consistent with that of the optical probe before the optical cable is not stretched. When the surface of the PBT film has defects, the PBT film can extend from the pore to two sides, the pore can be stretched and prolonged on the basis of the original stretching rate, the original broken opening with the diameter of 0.1mm can be stretched to 0.4-0.5 mm, the pore of the PBT film can be amplified to 400-500% of the original diameter, and the pore is easier to detect when the subsequent optical probe detects the pore. Through the amplification of tension wheel pair PBT film surface pore for the hole on the optical cable foaming filling rope is detected more easily, and the detection resources can also be practiced thrift in the amplification of hole simultaneously, on original detection rate's basis, can still be detected after the hole that makes unable quilt is amplified through increasing the transmission efficiency of optical cable foaming filling rope or reducing optical probe's pulse generation inferior.
Further, as a preferred embodiment of the present invention, the secondary detection process in the present application is specifically as follows:
the second optical probe is adopted to carry out secondary detection on the optical cable foaming filling rope stretched by the tension pulley, the distance between the second optical probe and the tension pulley is 20-40 cm at the moment, the stretching ratio of the optical cable foaming filling rope stretched is still 100-110%, the amplification ratio of the defect position of the broken PBT film is basically maintained at 400-500%, and the second optical probe is adopted to detect the stretched optical cable foaming filling rope at the moment, so that whether the surface of the optical cable foaming filling rope has pore defects is judged. The optical pulse emission frequency of the second optical probe is consistent with that of the first optical probe, the optical pulse emission frequency of the second optical probe and the optical pulse emission frequency of the first optical probe are preferably 10HZ, and under the condition that the rotation rate and the conveying rate of the original optical cable foaming filling rope are kept unchanged, the two optical probes can cover the whole process detection of the surface of the optical cable foaming filling rope, so that the surface defect detection of the optical cable foaming filling rope cannot be subjected to false detection or detection omission. When the distance between the second optical probe and the tension wheel is more than 40cm, the part of the optical cable foaming filling rope detected by the second optical probe can retract slightly, but the defects of the PBT film can be reduced and gathered due to the retraction of the optical cable foaming filling rope, so that the second optical probe cannot accurately find the defects of the holes on the PBT film.
As a preferred embodiment, the optical pulse emission frequency of the second optical probe is 5HZ, when the transmission rate of the optical cable foaming filling rope takes a high value of 300m/min, the emission gap of the optical pulse is 0.2s, the transmission distance of the optical cable foaming filling rope in one optical pulse emission gap is 1m, namely the optical cable foaming filling rope in 1m passes through the optical pulse detection once, but the hole on the optical cable foaming filling rope is amplified to be 1-5 times of the original defect, the probability of detecting the defect is greatly increased, and the defect detection accuracy is ensured. Of course, as an alternative, the optical pulse emission frequency of the second optical probe can be between 5HZ and 10HZ, and the effective detection of the surface defects of the foaming filling rope of the optical cable in the range of 1m can be realized.
As an alternative embodiment, the optical pulse emission frequency of the second optical probe in the application is 12500HZ, when the transmission rate of the optical cable foaming filling rope takes a high value, the transmission distance between two optical pulse emission gaps is 0.4mm, at the moment, the surface pores of the filling rope are enlarged to be between 0.4mm and 0.5mm, and the optical probe under the optical pulse emission frequency can realize the complete detection of the surface of the optical cable foaming filling rope.
When the two optical probes are used for detecting the surface of the optical cable foaming filling rope, the rotation rate and the transmission rate of the optical cable foaming filling rope are kept constant, the pulse emission frequencies of the two optical probes are the same, as the optical cable foaming filling rope stretched by the tension pulley is 1-1.1 times of the original length, the pore part is enlarged to be 4-5 times, the probability of detecting the amplified pore is greatly increased, and the detection accuracy of the optical cable foaming filling rope is further ensured under the matched detection of the two optical probes.
Further, as a preferred embodiment of the present invention, the secondary detection process in the present application further includes a traction process and a winding process, where the traction process mainly aims to accelerate the release of the tension of the optical cable foaming filling rope after being stretched by the tension wheel, and collect and store the detected optical cable foaming filling rope by the winding roller in the winding process, so as to facilitate the filling use in the subsequent cable.
The application also includes an optical cable foaming filling rope production and defect detection system, and it specifically includes the optical cable foaming filling rope extrusion module, optical cable foaming filling rope detection module and optical cable foaming filling rope collection module that set gradually, as shown in fig. 1.
Specifically, the optical cable foaming filling rope extrusion module comprises a foaming material extrusion molding device, a PBT extrusion molding device, a cooling water tank and a blow dryer, when the foaming polyethylene rope extruded by the foaming material extrusion molding device passes through the PBT extrusion molding device, the PBT extrusion molding device extrudes PBT and uniformly coats the periphery of the foaming polyethylene rope to form a film, the foaming polyethylene rope with the PBT film can be cooled and shaped through the cooling water tank to obtain a finished optical cable foaming filling rope, and in order to facilitate the detection of the subsequent optical cable foaming filling rope, the detection error of an optical probe caused by the surface moisture of the optical cable foaming filling rope is avoided, and the blow dryer is arranged behind the cooling water tank and is used for removing the surface moisture of the optical cable foaming filling rope.
The optical cable foaming filling rope detection module specifically comprises a first optical probe, a tension wheel and a second optical probe, wherein the first optical probe, the tension wheel and the second optical probe are sequentially arranged, the first optical probe and the second optical probe are respectively located above an optical cable foaming filling rope transmission line, and the tension wheel is located on the optical cable foaming filling rope transmission line. The first optical probe is mainly used for primarily detecting the surface defects of the foaming filling rope of the optical cable; the tension wheel is mainly used for stretching the optical cable foaming filling rope and amplifying the pore defects on the surface of the optical cable foaming filling rope, so that the detection of subsequent procedures is facilitated; the second optical probe is mainly used for detecting the surface defects of the stretched optical cable foaming filling rope.
The optical cable foaming filling rope collecting module specifically comprises a traction device and a take-up roller, wherein the traction device is mainly used for releasing the tension of the optical cable foaming filling rope stretched by the tension wheel, so that the optical cable foaming filling rope is restored to the original state, and the take-up roller is mainly used for collecting and storing the optical cable foaming filling rope, so that the follow-up optical cable filling is convenient.
Preferably, the front end and the rear end of the optical cable foaming filling rope detection module are respectively provided with an anti-shake device, and the anti-shake devices are mainly used for stabilizing the optical cable foaming filling rope, so that the optical cable foaming filling rope is continuously and stably conveyed in the subsequent two optical probe detection and tension wheel stretching processes, the stretching rate of the optical cable foaming filling rope is kept to be constant, insufficient stretching or stretching damage of the optical cable foaming filling rope caused by excessively fast conveying or excessively slow conveying is avoided, and the detection damage of the optical cable foaming filling rope is avoided while the accuracy of defect detection is ensured.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (8)
1. The method for detecting the surface defects of the foaming filling rope of the optical cable is characterized by comprising the following steps of:
and (3) preliminary detection: performing primary optical detection on the surface of the foaming filling rope of the optical cable; the preliminary detection specifically comprises the following steps:
setting an optical probe to emit optical pulses to the surface of the foaming filling rope, and setting a signal receiving device to receive the optical pulses reflected from the surface of the foaming filling rope;
judging whether the surface of the foaming filling rope has pore defects or not through the intensity comparison before and after the optical pulse reflection;
if the ratio of the intensity of the optical pulse after reflection to the intensity of the optical pulse before reflection is 20+/-2%, the detection part is indicated to have no pore defect; if the strength ratio is 4+/-1%, the surface detection part has pore defects;
defect amplification: stretching the optical cable foaming filling rope after primary optical detection, and arranging a tension pulley to stretch the foaming filling rope;
and (3) secondary detection: performing secondary optical detection on the stretched optical cable foaming filling rope; the secondary detection specifically comprises the following steps: and setting an optical probe to carry out secondary detection on the surface of the foaming filling rope after traction, adjusting the setting distance between the optical probe and the tension wheel, and enabling the distance between the optical probe and the tension wheel to be 0.2 m-0.4 m.
2. The method for detecting the surface defects of the foaming filling rope of the optical cable according to claim 1, wherein the preliminary detection process further comprises a stabilization process before the preliminary detection process, and the method specifically comprises the following steps:
the anti-shake device is arranged to limit the periphery of the optical cable foaming filling rope, so that the optical cable foaming filling rope is continuously and stably conveyed to the primary detection procedure.
3. The method for detecting surface defects of an optical cable foaming filling rope according to claim 2, wherein the foaming filling rope is conveyed to the preliminary detection process in a spiral tracing mode, the rotation speed of the optical cable foaming filling rope is 10rad/min, and the conveying speed of the optical cable foaming filling rope is 200-300 m/min.
4. The method for detecting the surface defects of the optical cable foaming filling rope according to claim 1, wherein the frequency of the optical pulse sent out by the optical probe in the preliminary detection is 5-10 HZ.
5. The method for detecting surface defects of an optical cable foaming filling rope according to claim 1, wherein the defect amplifying procedure specifically comprises the following steps:
and (3) the tension wheel is arranged to stretch the cable foaming filling rope, and the traction force of the tension wheel is controlled to be 20N-30N, so that the amplification rate of the holes on the cable foaming filling rope reaches 400% -500%.
6. The method for detecting the surface defects of the foaming filling rope of the optical cable according to claim 1, wherein the method further comprises a traction process and a wire collecting process after the secondary detection.
7. The method for detecting surface defects of an optical cable foaming filling rope according to claim 1, wherein the optical cable foaming filling rope for detecting the defects by the method is prepared by the following steps:
arranging an extrusion device to extrude and shape the foamed polyethylene;
a PBT extrusion molding device is arranged to cover a PBT film on the surface of extruded foaming polyethylene;
performing water cooling shaping on the foamed polyethylene coated with the PBT film to obtain an optical cable foaming filling rope;
and removing the water on the surface of the optical cable foaming filling rope after water cooling shaping to obtain the optical cable foaming filling rope to be detected.
8. The optical cable foaming filling rope production detection system is suitable for the optical cable foaming filling rope surface defect detection method in any one of claims 1-7, and is characterized by comprising an optical cable foaming filling rope extrusion module, an optical cable foaming filling rope detection module and an optical cable foaming filling rope collection module which are sequentially arranged; wherein,
the optical cable foaming filling rope extrusion module comprises a foaming material extrusion molding device, a PBT extrusion molding device, a cooling water tank and a dryer which are sequentially arranged; the PBT extrusion molding device is arranged above the discharge port of the foaming material extrusion molding device and is used for uniformly coating PBT on the periphery of the foaming polyethylene; the cooling water tank is arranged behind the discharge port of the foaming material extrusion molding device, and the air outlet of the blow dryer is opposite to the discharge port of the cooling water tank;
the optical cable foaming filling rope detection module is arranged at the rear end of the air outlet and is used for detecting the optical cable foaming filling rope after being dried by the dryer; the optical cable foaming filling rope detection module comprises a first optical probe, a tension pulley and a second optical probe which are sequentially arranged; the tension pulley is arranged on an extension line of the optical cable foaming filling rope and is used for stretching the optical cable foaming filling rope; the first optical probe and the second optical probe are respectively arranged above the optical cable foaming filling rope, the first optical probe is positioned at the front end of the tension wheel and used for detecting the surface of the optical cable foaming filling rope before stretching, and the second optical probe is positioned at the rear end of the tension wheel and used for detecting the surface of the optical cable foaming filling rope after stretching;
the optical cable foaming filling rope collecting module comprises a traction device and a take-up roller which are sequentially arranged, wherein the traction device is used for traction of the optical cable foaming filling rope after detection by the second optical probe, and the take-up roller is arranged at the wire outlet end of the traction device and used for collecting and storing the optical cable foaming filling rope after detection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111347002.4A CN114136756B (en) | 2021-11-15 | 2021-11-15 | Optical cable foaming filling rope surface defect detection method and production detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111347002.4A CN114136756B (en) | 2021-11-15 | 2021-11-15 | Optical cable foaming filling rope surface defect detection method and production detection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114136756A CN114136756A (en) | 2022-03-04 |
| CN114136756B true CN114136756B (en) | 2024-02-20 |
Family
ID=80393924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111347002.4A Active CN114136756B (en) | 2021-11-15 | 2021-11-15 | Optical cable foaming filling rope surface defect detection method and production detection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114136756B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115774023B (en) * | 2022-11-21 | 2024-07-26 | 长飞光纤光缆股份有限公司 | Online defect detection method for single-strand spiral skeleton type optical cable skeleton groove |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1149718A (en) * | 1995-10-27 | 1997-05-14 | 日本钢管株式会社 | Method for detecting surface defects and apparatus thereof |
| CN102037348A (en) * | 2008-05-22 | 2011-04-27 | 独立行政法人产业技术综合研究所 | Method for inspecting defects, and defect inspecting apparatus |
| CN202710809U (en) * | 2012-06-13 | 2013-01-30 | 沈阳亨通光通信有限公司 | Double-layer co-extrusion linear foaming gasket for packing device |
| CN106442564A (en) * | 2016-10-17 | 2017-02-22 | 中国科学院上海光学精密机械研究所 | Large-aperture ultra-smooth surface defect detection device and method |
| CN108008507A (en) * | 2017-11-24 | 2018-05-08 | 中广核拓普（四川）新材料有限公司 | Optical cable high-foaming gasket for packing and preparation method thereof |
| CN108918542A (en) * | 2018-08-29 | 2018-11-30 | 成都理工大学 | A kind of cable surface defect detecting device and method |
| CN110927170A (en) * | 2019-12-04 | 2020-03-27 | 中国工程物理研究院激光聚变研究中心 | Defect determination method, device and system |
| CN111323431A (en) * | 2020-03-10 | 2020-06-23 | 欧贝黎新能源科技股份有限公司 | Silicon wafer microcrack detection device based on solar cell and application method thereof |
| CN113447354A (en) * | 2021-06-30 | 2021-09-28 | 张家港宏昌钢板有限公司 | Inspection method for surface cracks of hot-rolled strip steel |
-
2021
- 2021-11-15 CN CN202111347002.4A patent/CN114136756B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1149718A (en) * | 1995-10-27 | 1997-05-14 | 日本钢管株式会社 | Method for detecting surface defects and apparatus thereof |
| CN102037348A (en) * | 2008-05-22 | 2011-04-27 | 独立行政法人产业技术综合研究所 | Method for inspecting defects, and defect inspecting apparatus |
| CN202710809U (en) * | 2012-06-13 | 2013-01-30 | 沈阳亨通光通信有限公司 | Double-layer co-extrusion linear foaming gasket for packing device |
| CN106442564A (en) * | 2016-10-17 | 2017-02-22 | 中国科学院上海光学精密机械研究所 | Large-aperture ultra-smooth surface defect detection device and method |
| CN108008507A (en) * | 2017-11-24 | 2018-05-08 | 中广核拓普（四川）新材料有限公司 | Optical cable high-foaming gasket for packing and preparation method thereof |
| CN108918542A (en) * | 2018-08-29 | 2018-11-30 | 成都理工大学 | A kind of cable surface defect detecting device and method |
| CN110927170A (en) * | 2019-12-04 | 2020-03-27 | 中国工程物理研究院激光聚变研究中心 | Defect determination method, device and system |
| CN111323431A (en) * | 2020-03-10 | 2020-06-23 | 欧贝黎新能源科技股份有限公司 | Silicon wafer microcrack detection device based on solar cell and application method thereof |
| CN113447354A (en) * | 2021-06-30 | 2021-09-28 | 张家港宏昌钢板有限公司 | Inspection method for surface cracks of hot-rolled strip steel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114136756A (en) | 2022-03-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114136756B (en) | Optical cable foaming filling rope surface defect detection method and production detection system | |
| US5971315A (en) | Method for determining the quality of reeling or winding and for controlling the reeling or winding | |
| EP3657226A1 (en) | Ultra-fine anti-ant air-blowing optical cable and manufacturing method therefor | |
| WO2018223499A1 (en) | Optical fibre cable with optical fibre sensing and communication functions, and manufacturing method therefor | |
| KR20140109028A (en) | Optical fiber composite cable | |
| CN112558250A (en) | Preparation process of full-dry optical cable | |
| US11703153B2 (en) | Encapsulated tubular cable with colorized identification strap, and preparation method thereof | |
| CN101306581A (en) | Process for winding tyre surface and system thereof | |
| CN114134699A (en) | Cloth breakage is checked and is accepted and is used transmission device based on infrared detection | |
| CN116552023A (en) | Production method and production equipment of carbon fiber composite core rod implanted with optical fiber | |
| EP3315447B1 (en) | Method for checking the integrity of composite load bearing member | |
| CN210546433U (en) | Building waterproofing membrane production system with select separately function | |
| JP2012184929A5 (en) | ||
| CN209985697U (en) | Production line of plastic coated silk threads | |
| CN211237813U (en) | Production line of storage battery line cable | |
| CN108374261B (en) | Warp beam dyeing system with color detection equipment and use method thereof | |
| CN108194718B (en) | Oil delivery hose with signal transmission function and preparation method thereof | |
| US11913171B2 (en) | Technical roll, in particular for paper manufacturing, method for introducing a polymer fibre into an empty conduit of a technical roll, and use of a polymer fibre | |
| CN220271189U (en) | Front-rear synchronous mechanism of high-precision composite material inspection machine | |
| IT201900001069A1 (en) | Device for the production of logs of paper material. | |
| CN220526074U (en) | Optical cable | |
| CN111554454B (en) | Double-in and double-out production process and equipment for rubber sleeve cable | |
| CN214897816U (en) | Production line of rubber jacketed flexible cable | |
| CN221631275U (en) | Device for detecting defects of fiber material prepreg | |
| CN210051768U (en) | Non-woven fabrics check out test set |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |