CN115493524B - Online detection device and method for defects in framework groove of framework type optical cable - Google Patents
Online detection device and method for defects in framework groove of framework type optical cable Download PDFInfo
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- CN115493524B CN115493524B CN202211456409.5A CN202211456409A CN115493524B CN 115493524 B CN115493524 B CN 115493524B CN 202211456409 A CN202211456409 A CN 202211456409A CN 115493524 B CN115493524 B CN 115493524B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/9515—Objects of complex shape, e.g. examined with use of a surface follower device
Abstract
The invention discloses an online detection device and method for defects in a framework groove of a framework optical cable. The device comprises one or more detection rings which are coaxially arranged with the optical cable framework, wherein one or more scanning laser radar probes are arranged on the detection rings; the number of scanning laser radar probes on one or more detection rings coaxially arranged with the optical cable skeleton is larger than or equal to the number of skeleton grooves of the optical cable skeleton. The method comprises the following steps: acquiring the cross section profile of the inner wall of the framework groove of the framework type optical cable on line; stacking the three-dimensional images into a three-dimensional image of the inner wall of the skeleton groove; and detecting the three-dimensional image of the inner wall of the skeleton groove, and identifying the defect in the skeleton groove when the shape of the inner wall of the skeleton groove is abnormal. The invention can detect the defects in the slot on line in real time, thereby taking remedial measures in time and avoiding that the skeleton slot without the identified defects enters the next procedure to possibly cause larger loss.
Description
Technical Field
The invention belongs to the field of intelligent manufacturing, and particularly relates to an online detection device and method for defects in a framework groove of a framework type optical cable.
Background
The framework type optical cable has the advantages of high optical fiber assembly density, no grease filling, good lateral pressure resistance, excellent moisture resistance, convenience in connection and the like, and is more and more favored by construction units and broad users. The skeleton type optical cable is characterized by having a skeleton with skeleton grooves, and whether the skeleton grooves meet the design standard or not is an important factor influencing the performance of the skeleton type optical cable.
The optical cable framework groove is difficult to avoid various abnormal problems in the production process, due to the structural characteristics of the framework groove, the traditional detection technology can only identify the outer diameter of a simple framework product or the large and obvious defect on the surface of the framework groove, only the position of the fault point alarms when the defect is identified, the state of the defect point cannot be judged in time, and only the rewinding detection can be carried out after the continuous production is finished, so that not only is the time and the labor consumed, but also more losses can be caused when the defect point cannot be treated and repaired. Particularly, when only small defects or defect points are located in the framework grooves, the conventional detection device cannot be identified in time, so that detection omission is caused, and when the framework grooves containing small impurities and without defects identified enter the next process, larger loss is possibly caused. For example, even if a relatively small protrusion exists in the skeleton groove, once the optical fiber ribbon is placed in the skeleton groove in the cabling production, the optical fiber ribbon is stressed when contacting with a defect in the skeleton groove, and fiber breakage is seriously caused.
Disclosure of Invention
Aiming at the defects or improvement requirements in the prior art, the invention provides a device and a method for online detecting the defects in a framework groove of a framework optical cable, and aims to adopt a scanning laser radar probe which is arranged opposite to the framework groove and moves synchronously to online obtain the contour without blind areas of the inner wall of the framework groove in a framework groove forming process for analyzing the defects in the framework groove of the framework optical cable, so that the technical problem that the defect condition in the framework groove of the framework optical cable cannot be obtained in the prior art is solved.
In order to achieve the above object, according to one aspect of the present invention, there is provided an in-slot defect on-line detection device for a skeleton-type optical cable skeleton, comprising one or more detection rings coaxially disposed with the optical cable skeleton, wherein the detection rings have one or more scanning lidar probes; the number of scanning laser radar probes on one or more detection rings coaxially arranged with the optical cable skeleton is larger than or equal to the number of skeleton grooves of the optical cable skeleton;
the detection ring is driven by a motor to rotate in a reciprocating manner, so that scanning laser radar probes on the detection ring respectively keep facing to skeleton grooves of the optical cable skeleton in at least one motion direction;
the scanning laser radar probe comprises an input optical fiber, a scanning laser transmitter, a reflection laser receiver and an output optical fiber;
when the scanning laser radar probe is over against the framework groove of the optical cable framework, pulse laser of the scanning laser radar probe is coupled to a scanning laser transmitter through an input optical fiber, irradiates the inner wall of the framework groove, is collected by the reflection laser receiver after being reflected by the inner wall of the framework groove, and is output through an output optical fiber;
the input optical fiber and the output optical fiber are arranged on the detection ring.
Preferably, the scanning laser emitted by the scanning lidar probe of the skeletal cable skeletal slot in-slot defect on-line detection device has a scanning angle α in a detection plane, and satisfies the following conditions:
wherein, l is the width of the notch of the skeleton groove, and D is the displacement vector from the emission light source of the scanning laser emitter to the notch plane of the skeleton groove;
when D is larger than 0, the emission light source of the scanning laser emitter is positioned outside the notch plane of the skeleton groove; when D =0, the emission light source of the scanning laser emitter is in the notch plane of the skeleton groove; when D is less than 0, the emission light source of the scanning laser emitter is positioned on the inner side of the notch plane of the skeleton groove.
Preferably, the skeleton groove of the skeleton optical cable skeleton groove internal defect online detection device has the structure that the width of the skeleton groove does not increase with the increase of the depth, namely:
if there is d 1 ＞d 2 Then must have l 1 ≤l 2 Wherein d is 1 、d 2 Two depths in the skeleton groove, l 1 、l 2 Respectively, the depth of the skeleton groove is d 1 、d 2 The respective width of (d);
and the emission light source of the scanning laser emitter is positioned outside the notch plane of the skeleton groove.
Preferably, in the device for online detection of defects in a framework slot of a framework type optical cable, the emission light source of the scanning laser emitter is located in a slot plane of the framework slot or inside the slot plane, and the scanning laser emitted by the scanning laser radar probe has a scanning angle alpha which is not less than pi in a detection plane.
Preferably, in the skeleton-type optical cable skeleton groove defect online detection device, the skeleton-type optical cable skeleton groove is an SZ-type spiral; the on-line detection device for the defects in the framework grooves of the framework optical cable comprises a detection ring, wherein scanning laser radar probes which are the same in number as the framework grooves and are distributed in the circumferential direction are arranged on the detection ring; the scanning laser radar probes correspond to the framework grooves one by one; the detection ring is driven by a motor to rotate in a reciprocating mode, and when the detection ring rotates in the reverse direction, the detection ring corresponds to a turning point of the SZ spiral of the skeleton groove, so that a scanning laser radar probe on the detection ring always keeps right opposite to the skeleton groove of the optical cable skeleton.
Preferably, the skeleton-type optical cable skeleton groove internal defect online detection device is characterized in that the skeleton-type optical cable skeleton groove is an S-shaped spiral; the on-line detection device for the defects in the skeleton grooves of the skeleton optical cable comprises a plurality of detection rings, wherein the number of scanning laser radar probes at least twice that of the skeleton grooves is arranged on the detection rings;
the detection rings are driven by a motor to rotate in a reciprocating manner, and the detection rings rotate in a reciprocating manner asynchronously, so that at least one scanning laser radar probe is opposite to the framework groove of the optical cable framework at any moment;
preferably, the scanning laser radar probe is over against a time period outside a framework groove of the optical cable framework, and a transmitting light source of the scanning laser transmitter is located outside a notch plane of the framework groove.
Preferably, in the skeleton optical cable skeleton groove defect online detection device, the scanning laser emitter is a solid-state scanning laser emitter.
Preferably, the device for online detection of defects in the skeleton slot of the skeleton optical cable comprises a pulse laser, a scanning laser transmitter and a dispersion prism, wherein the pulse laser is a picosecond or femtosecond wide spectrum pulse laser; the wide-spectrum pulse laser is collimated by the collimating element to form a parallel light source, and forms a scanning angle alpha in the detection plane through the dispersion prism.
Preferably, the reflection laser receiver of the device for online detection of defects in skeletal slots of skeletal cables comprises a receiving lens, and the reflection laser forms a receiving beam through the receiving lens and is coupled to the output optical fiber.
According to another aspect of the invention, an online detection method for defects in a framework groove of a framework optical cable is provided, which comprises the following steps:
by applying the device for detecting the defects in the framework groove of the framework optical cable, the cross section profile of the inner wall of the framework groove of the framework optical cable is obtained on line;
accumulating the cross section outline of the inner wall of the firmware groove obtained on line into a three-dimensional image of the inner wall of the framework groove;
and detecting the three-dimensional image of the inner wall of the skeleton groove, and identifying the defect in the skeleton groove when the shape of the inner wall of the skeleton groove is abnormal.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
according to the invention, the scanning laser radar probes arranged in the circumferential direction are driven by the detection ring to reciprocate, so that the scanning laser radar probes on the detection ring respectively keep facing the skeleton grooves of the optical cable skeleton in at least one motion direction, the non-blind-area cross section outline in the grooves is obtained, and the three-dimensional images accumulated in the grooves can detect the defects in the grooves on line in real time, so that remedial measures can be taken in time, and the skeleton grooves with the defects not identified can be prevented from entering the next procedure to possibly cause larger loss.
Drawings
FIG. 1 is a schematic structural view of an on-line detection device for a defect in a framework groove provided by the implementation of the invention
FIG. 2 is a schematic cross-sectional structure diagram of an online defect detection device in a framework groove provided by the implementation of the invention;
FIG. 3 is a side perspective view of an online defect detecting device for a framework groove provided in the practice of the invention;
FIG. 4 is a schematic data processing diagram of an online defect detecting device for a framework groove provided by the implementation of the invention;
FIG. 5 is a schematic view of a scanning laser radar probe of an online defect detection device in a framework groove, which is provided by the implementation of the invention;
FIG. 6 is a schematic view of a virtual optical focus of a scanning laser radar probe of the online defect detection device in a skeleton groove provided by the embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The defects in the framework grooves of the framework optical cable are difficult to detect, and mainly because the framework grooves are in a dynamic state in the production process, namely the framework grooves rotate relative to a central axis of a production line, and static laser radar probes inevitably have blind areas in the framework grooves. According to the device for detecting the defects in the framework groove of the framework type optical cable, provided by the invention, the scanning laser radar probe is controlled to reciprocate, and the framework groove which is over against the optical cable framework is kept as far as possible, so that a three-dimensional image of the inner wall of the framework groove without a blind area is obtained, the online defect detection of the framework groove forming process is carried out, the defects in the framework groove are processed in time, and the production loss is reduced.
The invention provides an on-line detection device for defects in a skeleton type optical cable skeleton groove, which comprises one or more detection rings coaxially arranged with an optical cable skeleton, wherein one or more scanning laser radar probes are arranged on the detection rings; the number of scanning laser radar probes on one or more detection rings coaxially arranged with the optical cable skeleton is larger than or equal to the number of skeleton grooves of the optical cable skeleton;
the scanning laser radar probe comprises an input optical fiber, a scanning laser transmitter, a reflection laser receiver and an output optical fiber;
when the scanning laser radar probe is over against the framework groove of the optical cable framework, pulse laser of the scanning laser radar probe is coupled to the scanning laser transmitter through the input optical fiber, irradiates the inner wall of the framework groove, is collected by the reflection laser receiver after being reflected by the inner wall of the framework groove, and is output through the output optical fiber.
The input optical fiber and the output optical fiber are arranged on the detection ring.
The detection ring is driven by a motor to rotate in a reciprocating manner, so that scanning laser radar probes on the detection ring respectively keep facing to skeleton grooves of the optical cable skeleton in at least one motion direction; scanning laser emitted by the scanning laser radar probe has a scanning angle alpha in a detection plane, and in order to obtain the skeleton groove inner wall profile without a blind area, the scanning laser radar probe needs to satisfy the following conditions:
wherein, l is the width of the notch of the skeleton groove, and D is the displacement vector from the emission light source of the scanning laser emitter to the notch plane of the skeleton groove;
when D is larger than 0, the emission light source of the scanning laser emitter is positioned outside the notch plane of the skeleton groove; when D =0, the emission light source of the scanning laser emitter is in the notch plane of the skeleton groove; when D is less than 0, the emission light source of the scanning laser emitter is positioned on the inner side of the notch plane of the framework groove.
When D is less than or equal to 0, the scanning laser radar probe can possibly penetrate into the framework groove, so that the scanning laser radar probe is always opposite to the framework groove and cannot cover the whole axial course of the framework groove through reciprocating motion, and the scanning laser radar probe is not suitable for framework groove type framework cables with S-shaped spirals.
In order to facilitate the optical fiber slot entering, the skeleton grooves are usually wider at the outer side, for example, the skeleton grooves with the cross section profile of a U-shaped trapezoid are also commonly seen, and the skeleton grooves with the same inner and outer widths, for example, rectangular skeleton grooves are also seen. Such a skeleton groove does not increase in width with increasing depth, i.e.:
if there is d 1 ＞d 2 Then must have a 1 ≤l 2 Wherein d is 1 、d 2 Two depths in the skeleton groove, l 1 、l 2 Respectively, the depth of the skeleton groove is d 1 、d 2 The respective width of (d);
for the framework groove, the emission light source of the scanning laser emitter is positioned outside the notch plane of the framework groove, and the contour of the inner wall of the framework groove without blind areas can be obtained. Scanning laser to scanning laser radar probe transmission has scanning angle alpha to require lessly in the detection plane, and it is comparatively convenient to scan the laser radar probe outside simultaneously and sets up, and is difficult to lead to damaging because mechanical motion is synchronous inaccurate.
The emission light source is a virtual focus point where the scanning laser light with the scanning angle alpha converges reversely, as shown in fig. 6.
For the C-shaped framework groove, the opening is smaller, if the emission light source is positioned at the outer side of the notch plane of the framework groove, the framework groove inner wall outline blind area still exists, in order to obtain the framework groove inner wall outline without the blind area, the emission light source of the scanning laser emitter is positioned in the notch plane of the framework groove or at the inner side of the notch plane, and the scanning laser emitted by the scanning laser radar probe has a scanning angle alpha which is larger than or equal to pi in the detection plane. Of course, this arrangement is also applicable to a frame groove having a wide outer side.
Because the scanning laser radar probe needs to be over against the framework groove to obtain the framework groove inner wall profile without the blind area, a detection ring for arranging the scanning laser radar probe needs to rotate along the circumferential direction synchronously with the framework groove. However, the input/output optical fibers are all disposed on the detection ring, and are restricted by the optical path, and the optical fibers are wound due to the continuous rotation, and need to be rotated and reset in a reciprocating manner.
For the framework cable with the SZ-shaped framework groove, the framework cable can be matched with the SZ spiral to reset, so that the arrangement of the scanning laser radar probe opposite to the framework groove is relatively simple. When the skeleton grooves of the skeleton optical cable are SZ-shaped spirals, the online detection device for the defects in the skeleton grooves of the skeleton optical cable comprises a detection ring, wherein scanning laser radar probes which are the same as the skeleton grooves in number and are distributed in the circumferential direction are arranged on the detection ring; the scanning laser radar probes correspond to the framework grooves one by one; the detection ring is driven by a motor to rotate in a reciprocating mode, and when the detection ring rotates in the reverse direction, the detection ring corresponds to a turning point of the SZ spiral of the skeleton groove, so that a scanning laser radar probe on the detection ring always keeps right opposite to the skeleton groove of the optical cable skeleton.
For the framework cable of the S-shaped framework groove, if scanning laser radar probes are in one-to-one correspondence with the framework grooves and the scanning laser radar probes on the detection ring are always kept opposite to the framework grooves of the optical cable framework, optical fibers are wound and cannot be reset. The invention adopts the many-to-one arrangement of the scanning laser radar probes and the framework groove, when one of the laser radar probes is reversely reset along with the detection ring, the detection range of other scanning laser radar probes covers the missed detection range of the laser radar probe, thereby realizing the continuous online monitoring of the axial direction of the framework groove.
When the skeleton type optical cable skeleton groove is an S-shaped spiral, the online detection device for the defects in the skeleton type optical cable skeleton groove comprises a plurality of detection rings, and scanning laser radar probes with the number at least twice that of the skeleton grooves are arranged on the plurality of detection rings; the detection rings are driven by a motor to rotate in a reciprocating mode, and the detection rings rotate in a reciprocating mode asynchronously, so that at least one scanning laser radar probe is opposite to the framework groove of the optical cable framework at any moment.
In this case, it should be noted that, in a time period in which the scanning lidar probe is directly opposite to the outside of the skeleton groove of the optical cable skeleton, that is, in the process of reverse reset, the emission light source of the scanning laser transmitter is located outside the notch plane of the skeleton groove, otherwise, the scanning lidar probe collides with the optical cable skeleton, which causes loss.
For the skeleton groove with a wider outer side, the emission light source of the scanning laser emitter is positioned outside the notch plane of the skeleton groove, so that the scanning laser radar probe does not touch the optical cable skeleton during reciprocating rotation even if the radial position of the scanning laser radar probe is kept unchanged.
For a skeleton groove with a narrow outer side, such as a C-shaped skeleton groove, the scanning laser probe needs to move radially outward during the reverse reset process, so that the scanning laser probe avoids the optical cable skeleton during the reverse reset process.
The scanning laser emitter is a solid state scanning laser emitter. Compared with a mechanical dynamic scanning laser transmitter, the solid-state scanning laser transmitter only needs to arrange the optical lens on the scanning laser probe, is stable in structure and simple to arrange, and cannot further improve the wiring difficulty of the optical fiber ring. The pulse laser is picosecond or femtosecond wide spectrum pulse laser, and the scanning laser transmitter comprises a collimation element and a dispersion prism; the wide-spectrum pulse laser is collimated by the collimating element to form a parallel light source, and forms a scanning angle alpha in the detection plane through the dispersion prism. The wide-spectrum pulse laser forms a relatively large scanning angle alpha through the dispersion prism, and the large scanning angle alpha of the laser probe can be realized through a single light path, so that the requirement on the number of optical devices is reduced.
The invention provides an online detection method for defects in a skeleton groove of a skeleton optical cable, which comprises the following steps:
applying the device for detecting the defects in the framework groove of the framework type optical cable on line to obtain the cross section profile of the inner wall of the framework groove of the framework type optical cable on line;
accumulating the section profiles of the inner walls of the firmware grooves obtained on line into a three-dimensional image of the inner wall of the skeleton groove;
and detecting the three-dimensional image of the inner wall of the skeleton groove, and identifying the defect in the skeleton groove when the shape of the inner wall of the skeleton groove is abnormal.
The following are examples:
for the optical cable framework of the SZ spiral with 6 rectangular grooves, the device for online detecting the defect in the groove of the framework-type optical cable framework provided by the embodiment has the following overall structure as shown in fig. 1, and comprises: 1 is the box, 2 is the base, and 3 is the motor, and 4 are the support, and 5 are a detection ring, are provided with 6 scanning laser radar probes on the detection ring, and 6 are the switch board, and 7 are alarm system, and 8 are visual display system, and 9 are laser radar probe, 10 the control unit, sensor.
The scanning laser radar probe comprises an input optical fiber, a scanning laser transmitter, a reflection laser receiver and an output optical fiber;
as shown in fig. 5, when the scanning lidar probe faces the framework groove of the optical cable framework, the pulse laser of the scanning lidar probe is coupled to the scanning laser transmitter through the input optical fiber, irradiates the inner wall of the framework groove, is collected by the reflection laser receiver after being reflected by the inner wall of the framework groove, and is output through the output optical fiber.
The input optical fiber and the output optical fiber are arranged on the detection ring, as shown in fig. 2.
The detection ring is connected with the wide spectrum optical fiber amplification system and the femtosecond optical fiber laser through the input optical fiber. The wide-spectrum optical fiber amplification system uniformly couples the optical power of signal light generated by a femtosecond optical fiber laser after amplification into 6 scanning laser radar probe optical paths, the working bandwidth of the wide-spectrum optical fiber amplification system is 1529nm-1569nm, and the specific structure is disclosed in Chinese patent document CN112563870A.
The scanning laser emitter is a solid state scanning laser emitter. Compared with a mechanical dynamic scanning laser transmitter, the solid-state scanning laser transmitter only needs to arrange the optical lens on the scanning laser probe, is stable in structure and simple to arrange, and cannot further improve the wiring difficulty of the optical fiber ring. The pulse laser is picosecond or femtosecond wide spectrum pulse laser, and the scanning laser transmitter comprises a collimation element and a dispersion prism; the wide-spectrum pulse laser is collimated by the collimating element to form a parallel light source, and forms a scanning angle alpha in the detection plane through the dispersion prism.
The motor generates a control signal by a control unit of the control cabinet, the bracket is connected with the motor through a transmission device, and the motor drives the detection ring to rotate or reciprocate according to a preset period by taking a shaft core of the framework production line as a shaft, as shown in figure 3. The scanning laser radar probes correspond to the framework grooves one by one; the detection ring is driven by a motor to rotate in a reciprocating mode, and when the detection ring rotates in the reverse direction, the detection ring corresponds to a turning point of the SZ spiral of the skeleton groove, so that a scanning laser radar probe on the detection ring always keeps right opposite to the skeleton groove of the optical cable skeleton.
Scanning laser emitted by the scanning laser radar probe has a scanning angle alpha in a detection plane, and in order to obtain the skeleton groove inner wall profile without a blind area, the scanning laser radar probe needs to satisfy the following conditions:
wherein, l is the width of the notch of the skeleton groove, and D is the displacement vector from the emission light source of the scanning laser emitter to the notch plane of the skeleton groove; in this example, α is
And the emission light source of the scanning laser emitter is positioned outside the notch plane of the skeleton groove.
The invention provides an online detection method for defects in a skeleton groove of a skeleton optical cable, which comprises the following steps:
applying the device for detecting the defects in the framework groove of the framework type optical cable on line, and acquiring the cross section outline of the inner wall of the framework groove of the framework type optical cable on line as shown in fig. 4;
accumulating the section profiles of the inner walls of the firmware grooves obtained on line into a three-dimensional image of the inner wall of the skeleton groove;
and detecting the three-dimensional image of the inner wall of the framework groove, and identifying the framework groove as a defect when the shape of the inner wall of the framework groove is abnormal.
Specifically, in the preparation stage, when the head end of the framework groove passes through a through hole on the inlet side of the box body, the brush surrounded by the through hole firstly cleans the framework surface and the inside of the groove once, the cleaned framework groove passes through a detection ring and is aligned to each framework groove by using 6 groups of scanning laser radar probes, and surface imaging with submicron precision is performed by using a magnitude 3D technology (such as structured light scanning detection) and a high-resolution color camera.
The method comprises the following steps of utilizing the process of axial movement of a cable along the production direction, continuously and respectively carrying out non-blind area scanning on the inner wall outline of the same point position of a passing framework groove by using a scanning laser radar probe to ensure the complete information of the size data of the framework groove, transmitting collected parameter information of a plurality of scanning surfaces and the accurate identification of the marker line of the framework groove to a computer control unit after the scanning precision of the scanning laser radar probe is 0.02mm, forming a complete real-time framework groove inner wall three-dimensional image after the graph of each scanning surface is processed by a computer program through graph calculation, and simultaneously displaying each parameter size in the profile graph of the framework groove in a real-time display manner of a visual display system, wherein the process comprises the following steps: the overall diameter of the skeleton groove, the depth of each groove and the width of the groove bottom surface of each groove are determined, the preset program automatically makes the parameters and the preset skeleton groove process graph of the database graph coincide according to the identified characteristic points of the position image of the skeleton groove marked line to obtain a superposed image, the size of the superposed image is calculated, the superposed image is corrected at a fixed point and then is compared with the database and related sizes (including the diameter of the skeleton groove, the width of the upper groove, the width of the lower groove and the depth of the groove) are calculated, if the system determines that the product is qualified in the range of the set graph and the parameter sizes, the subsequent production can be carried out.
In a specific embodiment, the detected skeleton groove comprises the diameter, the upper groove width of each groove, the lower groove width of each groove and the depth of each groove, and the 3D defect can be detected and obtained through the superposed images.
When the system detects that the requirements of the comparison graph and the parameter size are exceeded in the production process, the control unit activates an automatic screen capture function, carries out screen capture and retention on a section graph formed at the current fault point and a display numerical value of the current production length, meanwhile, presets a computer program to retain the whole fault point and the position of 2mm in front and at the back of the fault point into a 3D graph, and simultaneously activates an acoustic/optical alarm system so as to remind production personnel to analyze the state of the fault point in time and confirm a subsequent processing scheme.
The sensor is connected with the meter counter through signals and transmits real-time production length data to the control unit so as to accurately position the position of the detection point
The visual display system displays the related graph real-time parameter information, thereby being convenient for checking in time
In a specific embodiment, the database is debugged, parameters are set, a graph legend with related dimensions is stored, after the debugging is successful, corresponding comparison data is called according to a produced framework slot product, for example, after the 6-slot 6-layer 6-core belt framework slot is debugged successfully, the structural framework slot comparison parameters prestored in the detection system are called when the structural framework slot is produced, and the data can be compared during production, so that the automation, standardization and informatization of 3D defect detection are realized, and the defect identification is actually, efficiently and accurately carried out.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (11)
1. The on-line detection device for the defects in the slot of the skeleton type optical cable skeleton is characterized by comprising one or more detection rings coaxially arranged with the optical cable skeleton, wherein one or more scanning laser radar probes are arranged on the detection rings; the number of scanning laser radar probes on one or more detection rings coaxially arranged with the optical cable skeleton is larger than or equal to the number of skeleton grooves of the optical cable skeleton;
the detection ring is driven by a motor to rotate in a reciprocating manner, so that scanning laser radar probes on the detection ring respectively keep facing to skeleton grooves of the optical cable skeleton in at least one motion direction;
the scanning laser radar probe comprises an input optical fiber, a scanning laser transmitter, a reflection laser receiver and an output optical fiber;
when the scanning laser radar probe is over against the framework groove of the optical cable framework, pulse laser of the scanning laser radar probe is coupled to a scanning laser transmitter through an input optical fiber, irradiates the inner wall of the framework groove, is collected by the reflection laser receiver after being reflected by the inner wall of the framework groove, and is output through an output optical fiber;
the input optical fiber and the output optical fiber are arranged on the detection ring.
2. The device for on-line detection of defects in a skeletal cable groove of claim 1, wherein the scanning laser radar probe emits scanning laser with a scanning angle α in a detection plane, and satisfies the following conditions:
wherein, l is the width of the slot opening of the framework slot, and D is the displacement vector from the emission light source of the scanning laser emitter to the slot opening plane of the framework slot;
when D is larger than 0, the emission light source of the scanning laser emitter is positioned outside the notch plane of the skeleton groove; when D =0, the emission light source of the scanning laser emitter is in the notch plane of the skeleton groove; when D is less than 0, the emission light source of the scanning laser emitter is positioned on the inner side of the notch plane of the skeleton groove.
3. The device for on-line detection of defects in skeletal slots of skeletal cables of claim 2, wherein the width of the skeletal slot does not increase with increasing depth, namely:
if there is d 1 ＞d 2 Then must have l 1 ≤l 2 Wherein d is 1 、d 2 Two depths in the skeleton groove, l 1 、l 2 Respectively, the depth of the skeleton groove is d 1 、d 2 The respective width of (d);
and the emission light source of the scanning laser emitter is positioned outside the notch plane of the skeleton groove.
4. The device for on-line detection of defects in a skeletal slot of a skeletal cable according to claim 2, wherein the emission light source of the scanning laser emitter is located in the slot plane of the skeletal slot or inside the slot plane, and the scanning laser emitted by the scanning laser radar probe has a scanning angle α ≧ π in the detection plane.
5. The apparatus for on-line detection of defects in a skeletal cable skeleton groove of any one of claims 1 to 4, wherein the skeletal cable skeleton groove is an SZ-type helix; the on-line detection device for the defects in the framework grooves of the framework optical cable comprises a detection ring, wherein scanning laser radar probes which are the same in number as the framework grooves and are distributed in the circumferential direction are arranged on the detection ring; the scanning laser radar probes correspond to the framework grooves one by one; the detection ring is driven by a motor to rotate in a reciprocating mode, and when the detection ring rotates in the reverse direction, the detection ring corresponds to a turning point of the SZ spiral of the skeleton groove, so that a scanning laser radar probe on the detection ring always keeps right opposite to the skeleton groove of the optical cable skeleton.
6. The apparatus for on-line detection of defects in a skeletal cable skeleton groove of any one of claims 1 to 4, wherein the skeletal cable skeleton groove is an S-shaped helix; the on-line detection device for the defects in the skeleton grooves of the skeleton optical cable comprises a plurality of detection rings, wherein the number of scanning laser radar probes at least twice that of the skeleton grooves is arranged on the detection rings;
the detection rings are driven by a motor to rotate in a reciprocating mode, and the detection rings rotate in a reciprocating mode asynchronously, so that at least one scanning laser radar probe is opposite to the framework groove of the optical cable framework at any moment.
7. The device for on-line detection of defects in a skeletal slot of a skeletal cable skeleton of claim 6, wherein the scanning lidar probe faces a time period outside the skeletal slot of the cable skeleton, and a light emitting source of the scanning lidar transmitter is located outside a slot plane of the skeletal slot.
8. The skeletal cable skeleton slot defect online detection device of claim 1, wherein the scanning laser emitter is a solid-state scanning laser emitter.
9. The apparatus for on-line detection of defects in skeletal cable grooves of claim 8, wherein the pulsed laser is a picosecond or femtosecond broad spectrum pulsed laser, and the scanning laser transmitter comprises a collimating element and a dispersive prism; the wide-spectrum pulse laser is collimated by the collimating element to form a parallel light source, and forms a scanning angle alpha in the detection plane through the dispersion prism.
10. The device for on-line detection of defects in slotted grooves of a skeletal cable skeleton as claimed in claim 1, wherein the reflective laser receiver comprises a receiving lens, and the reflective laser forms a receiving beam through the receiving lens and couples the receiving beam to the output optical fiber.
11. An online detection method for defects in a framework groove of a framework type optical cable is characterized by comprising the following steps:
applying the device for detecting defects in the skeleton optical cable skeleton groove of any one of claims 1 to 10 to obtain the cross-sectional profile of the inner wall of the skeleton optical cable skeleton groove on line;
accumulating the online acquired cross section profiles of the inner wall of the framework groove into a three-dimensional image of the inner wall of the framework groove;
and detecting the three-dimensional image of the inner wall of the skeleton groove, and identifying the defect in the skeleton groove when the shape of the inner wall of the skeleton groove is abnormal.
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| DE19955136A1 (en) * | 1999-11-17 | 2001-05-31 | Sms Demag Ag | Method and device for non-contact online hot wall thickness measurement on pipes |
| CN100353162C (en) * | 2004-09-24 | 2007-12-05 | 华中科技大学 | Pipe rod screw fault detection sensor |
| JP5663240B2 (en) * | 2010-08-31 | 2015-02-04 | 株式会社トプコン | Optical tomographic imaging apparatus and operating method thereof |
| CN205228392U (en) * | 2015-11-25 | 2016-05-11 | 四川航天计量测试研究所 | On --spot detection device of screw thread parameter |
| CN112461162A (en) * | 2019-09-09 | 2021-03-09 | 无锡市旭恒精密机械有限公司 | Piston rod polished surface detection device |
| CN211121103U (en) * | 2019-09-29 | 2020-07-28 | 北京亚力特科技开发有限公司 | Bearing seal groove flatness detection device |
| CN113325533B (en) * | 2021-05-25 | 2022-02-18 | 长飞光纤光缆股份有限公司 | Skeleton type optical fiber ribbon optical cable |
| CN115014239A (en) * | 2022-07-12 | 2022-09-06 | 吉光半导体科技有限公司 | Laser scanning system |
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