A kind of based on optical fiber taper device and intelligent visual monitoring system

Abstract

The application discloses a kind of based on optical fiber tapering device and intelligent visual monitoring system, including, micro-nano optical fiber tapering platform, electric heating platform, ceramic heating head, depth camera, intelligent terminal, electric screw rod and electric guide rail;Wherein, the electric heating platform, depth camera, electric screw rod and electric guide rail are electrically connected by wire with the intelligent terminal, the distance between the optical fiber waist area and the ceramic heating head can be monitored in real time by the depth camera set, and the picture monitored is displayed by the intelligent terminal for staff to observe, greatly reduce the fusing or mechanical fracture caused by the contact between heating head and waist area during tapering process, effectively improve the success rate of micro-nano optical fiber and its extended structure tapering, reduce the time and economic cost of scientific research or engineering application.

Description

Technical Field

[0001] This invention relates to the field of optical fiber device manufacturing technology, and in particular to an optical fiber taper device and intelligent visual monitoring system. Background Technology

[0002] The electrically heated flame brush method is a key technology for fabricating micro / nano optical fibers. This technique utilizes an electrically heated flame brush to create tiny flame brushes on a glass preform. The high temperature of the flame melts the fiber material, and by superimposing unidirectional and counter-directional velocities on a displacement stage, the surface tension and tensile force are used to form fine optical fibers. Assuming the heating head is a "regionally uniform heat source," based on the temperature characteristics of the glass material, the softening temperature of single-mode fiber is approximately 1665℃, and the annealing temperature is 1140℃. The waist region temperature of the stretched fiber must be above the annealing temperature, and the closer it is to the softening temperature, the easier it is to stretch.

[0003] However, during the stretching process, the tensile and compressive forces generated by the movement of the fiber displacement stage, or the changes in the length of the fiber waist region, or the influence of airflow in the environment, can cause the spatial position of the fiber waist region to change relative to its initial position. Since the space inside the ceramic heating head is limited, the fragile and small waist region may melt due to high temperature or break due to mechanical force when it comes into contact with the inner wall of the heating head. For the tapered structure of the fiber coupler, it may also lead to the destruction of the coupling structure. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of the embodiments of the present invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section, as well as in the abstract and title of the present application, to avoid obscuring the purpose of this section, the abstract and title of the invention. Such simplifications or omissions shall not be used to limit the scope of the present invention.

[0005] In view of the problems existing in the above and / or prior art, the present invention is proposed.

[0006] Therefore, the technical problem to be solved by the present invention is that during the stretching process of the fiber displacement stage, the waist region of the fiber will gradually approach the ceramic heating head, which will cause it to melt due to high temperature or break due to mechanical force, resulting in economic losses.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a fiber optic tapering device, comprising a micro / nano fiber optic tapering stage, an electric heating stage, a ceramic heating head, a depth camera, a smart terminal, an electric screw, and an electric guide rail; wherein the electric heating stage, the depth camera, the electric screw, and the electric guide rail are all electrically connected to the smart terminal via wires.

[0008] As a preferred embodiment of the fiber taper device of the present invention, there are two micro-nano fiber taper platforms, which are respectively arranged on the left and right sides of the electric guide rail. The micro-nano fiber taper platform is the main device for preparing micro-nano fibers based on the flame brush principle. The electric heating stage is arranged in the middle of the electric guide rail and is located on the right side of the micro-nano fiber taper platform.

[0009] As a preferred embodiment of the fiber optic tapering device of the present invention, wherein: the outer surface of the electric screw is threadedly connected to a lifting plate, and the electric heating stage is fixedly installed at the rear end of the lifting plate; the ceramic heating head is installed in the middle of the rear side of the electric heating stage, and is located at the exact center of the two micro-nano fiber optic tapering stages; two depth cameras are provided, and the two depth cameras are fixedly installed on the cantilever arms on the left and right sides of the ceramic heating head, and the camera ends of the two depth cameras are respectively aligned with the left and right sides of the ceramic heating head.

[0010] The beneficial effects of this invention are as follows: the distance between the fiber waist region and the ceramic heating head can be monitored in real time by setting a depth camera, and the monitored image can be displayed by a smart terminal for staff to observe, which greatly reduces the occurrence of melting or mechanical breakage caused by the heating head contacting the waist region during the tapering process, effectively improves the success rate of tapering micro-nano optical fibers and their extended structures, and reduces the time and economic costs of scientific research or engineering applications.

[0011] In view of the problems existing in the above and / or prior art, a second embodiment of the present invention is proposed.

[0012] Therefore, the problem to be solved by this invention is how to accurately and effectively monitor the distance between the fiber waist region and the ceramic heating head.

[0013] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an intelligent visual monitoring system, including the fiber optic tapering device applied in the previous embodiment, and further including a depth image acquisition module, an intelligent image analysis module, and a heating head automatic correction module; the depth image acquisition module acquires depth images of the heating grooves on the left and right sides of the ceramic heating head and the waist region of the tapered micro / nano fiber through a depth image acquisition device and transmits them to an intelligent terminal; the intelligent image analysis module reconstructs a 3D model of the waist region of the micro / nano fiber inside the ceramic heating head and the heating inner wall in real time using the acquired depth images, and calculates the distance of each unit length of the waist region from the inner wall; the heating head automatic correction module, when the distance of a certain unit length of the waist region from the inner wall is less than a safety threshold, fine-tunes the guide rail and screw of the heating device through a program to move the inner wall away from the waist region to a distance greater than the safety threshold, so as to avoid the situation of melting or mechanical breakage caused by the heating head contacting the waist region during the tapering process.

[0014] As a preferred embodiment of the intelligent visual monitoring system of the present invention, the depth image acquisition module starts working after the signal for the start of the tapering process of the electrically heated flame brush micro-nano fiber tapering device is received; wherein, before the start of each image acquisition cycle, the acquisition parameters, such as resolution, frame rate, and exposure time, are adjusted according to specific requirements to avoid image distortion, and then the depth images of the heated groove and the waist area of ​​the tapered micro-nano fiber are periodically acquired by two depth image acquisition devices mounted on the far side of the electrically heated platform and transmitted to the intelligent terminal.

[0015] As a preferred embodiment of the intelligent visual monitoring system of the present invention, the intelligent image analysis module, after receiving the image transmitted by the depth image acquisition module, reconstructs the model of the inner micro-nano fiber waist region and the inner wall of the ceramic heating head based on two depth images through steps such as image alignment, point cloud generation and registration, and Poisson reconstruction. Then, it uses the support vector machine algorithm to segment the heating head and the fiber waist region and establish a three-dimensional coordinate system.

[0016] As a preferred embodiment of the intelligent visual monitoring system of the present invention, the heating head automatic correction module decomposes the signal into two parts, front-back and up-down, after receiving the movement signal from the intelligent image analysis module. The electric heating platform is moved back and forth by controlling the electric guide rail, and the electric heating platform is moved up and down by controlling the electric screw, until the distance between the waist zone unit (which is less than the safety threshold) and the inner wall of the heating head is greater than or equal to the safety threshold.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. The depth photography technology used can provide accurate three-dimensional position and distance information of objects in the scene, enabling accurate positioning and distance measurement of tiny objects, providing a foundation for subsequent processing and analysis. It solves the shortcomings of RGB photography technology in complex background segmentation and weak target detection capabilities, and can distinguish the distance and spatial relationship between the waist region and the inner wall of the heating head, thereby better detecting, tracking and segmenting the waist region of micro-nano fiber optics.

[0019] 2. The 3D reconstruction technology used can provide accurate three-dimensional structural information, transforming complex data into intuitive and easy-to-understand three-dimensional models. This helps in the visualization and in-depth analysis of data. Compared with traditional measurement and modeling methods, 3D reconstruction technology is non-contact and non-destructive. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0021] Figure 1 This is an overall structural diagram of the fiber taper device of the present invention;

[0022] Figure 2 This is a flowchart of the intelligent visual monitoring system of the present invention;

[0023] Figure 3 This is a three-dimensional coordinate system model of the waist region of the micro / nano fiber and the heated inner wall of the present invention.

[0024] In the image: 1. Micro-nano fiber optic tapered stage; 2. Intelligent electric heating stage; 3. Ceramic heating head; 4. Depth camera; 5. Intelligent terminal; 6. Electric screw; 7. Electric guide rail. Detailed Implementation

[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the present invention will be described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure will be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0028] Furthermore, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments.

[0029] Example 1

[0030] Reference Figure 1This embodiment provides a fiber optic tapering device, including a micro / nano fiber optic tapering stage 1, an electric heating stage 2, a ceramic heating head 3, a depth camera 4, a smart terminal 5, an electric screw 6, and an electric guide rail 7. The electric heating stage 2, the depth camera 4, the electric screw 6, and the electric guide rail 7 are all electrically connected to the smart terminal 5 via wires. The smart terminal 5 can control the operation of the electric screw 6 and the electric guide rail 7, and collect data transmitted from the electric heating stage 2 and the depth camera 4.

[0031] Specifically, there are two micro-nano fiber tapered platforms 1, which are respectively set on the left and right sides of the electric guide rail 7. The micro-nano fiber tapered platform 1 is the main device for preparing micro-nano fibers based on the flame brush principle. The electric heating stage 2 is set in the middle of the electric guide rail 7 and is located on the right side of the micro-nano fiber tapered platform 1. Both the micro-nano fiber tapered platform 1 and the electric heating stage 2 can move on the electric guide rail 7. The electric guide rail 7 is a prior art structure and will not be described in detail.

[0032] Furthermore, the ceramic heating head 3 is installed in the middle of the rear side of the electric heating stage 2, and is located in the middle of the two micro-nano fiber optic tapered stages 1. Two depth cameras 4 are provided, and the two depth cameras 4 are fixedly installed on the cantilever on the left and right sides of the ceramic heating head 3, and the camera ends of the two depth cameras 4 are respectively aligned with the left and right sides of the ceramic heating head 3.

[0033] When the electric screw 6 is running, it can drive the lifting plate to move up and down. The lifting plate can drive the electric heating platform 2 at the rear end to move up and down. At the same time, the ceramic heating head 3 and the depth camera 4 set on both sides of the electric heating platform 2 can follow the electric heating platform 2 to move up and down. The camera end of the depth camera 4 is aimed at the ceramic heating head 3, so that the image at the ceramic heating head 3 can be monitored in real time.

[0034] The working principle of this embodiment is as follows: After the starting signal of the tapering process of the electrically heated flame brush micro-nano fiber tapering stage 1 is transmitted to the depth camera 4, the depth camera 4 automatically sets the acquisition parameters, adjusts the acquisition mode of the depth camera 4 to continuous acquisition mode, sets the acquisition frequency to once per flame brush cycle, and automatically adjusts its resolution, exposure time, exposure gain, and depth detection range. This allows the depth camera 4 to clearly, accurately, and completely acquire the depth information of the ceramic heating head 3 and the micro-nano fiber 8 while saving computing resources and storage space. Then, the two depth images acquired by the left and right depth cameras 4 are transmitted to the smart terminal 5.

[0035] Example 2

[0036] Reference Figures 1-3This is the second embodiment of the present invention. This embodiment provides an intelligent visual monitoring system, which includes the fiber optic tapered device used in embodiment 1, and also includes a depth image acquisition module, an intelligent image analysis module, and a heating head automatic correction module.

[0037] Specifically, the depth image acquisition module starts working after the signal is received at the beginning of the tapering process of the electrically heated flame brush micro-nano fiber tapering stage 1. Before the start of each image acquisition cycle, the acquisition parameters, such as resolution, frame rate, and exposure time, are adjusted according to specific needs to avoid image distortion. Two depth image acquisition devices mounted on the far side of the heating stage periodically acquire depth images of the heated groove and the waist area of ​​the tapered micro-nano fiber and transmit them to the smart terminal.

[0038] Among them, during the flame brush tapering process, the waist length l w The change can be represented as:

[0039] l w =L0+αx

[0040] In the formula, L0 represents the waist length of the previous "flame brush" scan, x represents the length of the waist that is stretched, and the constant α is a parameter that controls the change in waist morphology during the "flame brush" process. It can be seen that the change in waist length of micro-nano fiber is periodic with the flame brush process. That is, the correction of waist position needs to be based on the time of one flame brush process. Therefore, one flame brush cycle, namely one unidirectional flame brush and one reverse tapering time, is used as the image acquisition cycle of the depth image acquisition module.

[0041] After one image acquisition cycle from the previous image acquisition module, the intelligent image analysis module checks for a tapered end signal input. If no tapered end signal input is found, it outputs a signal to the intelligent terminal 5 to restart the above process. If a tapered end signal input is found, it exits the entire system, completing the intelligent visual monitoring and correction process.

[0042] Furthermore, the intelligent image analysis module receives the image from the depth image acquisition module, and then reconstructs a 3D model of the inner micro / nano fiber waist region and the inner wall of the ceramic heating head based on two depth images through steps such as image alignment, point cloud generation and registration, and Poisson reconstruction. Then, a support vector machine algorithm is used to segment the heating head model and the fiber waist region model and establish a three-dimensional coordinate system. The distance from the normal direction of each unit in the waist region to the inner wall of the heating head is calculated. If there is a waist region unit with a length less than a safety threshold, a movement signal in the opposite direction is output to the heating head automatic correction module.

[0043] When the intelligent terminal 5 receives the depth images of the left and right heating heads and the waist region of the micro-nano fiber from the depth image acquisition module, the intelligent image analysis module uses the SIFT algorithm and the RANSAC algorithm to align the images.

[0044] Among them, the SIFT algorithm:

[0045] By applying the difference of Gaussian pyramid to the two depth images of the heating head captured by depth camera 4 at different scales, the locations of image locations with local extrema were detected. These locations may correspond to key feature points in the depth images of the heating head and micro / nano fiber. Then, by precisely locating the extrema points in scale space, the curvature information in scale space was used to exclude low-contrast points and edge response points in the two depth images. The stability and repeatability of feature points were also used for further filtering. A principal direction was assigned to each key point by calculating the gradient histogram for subsequent rotation invariance. Within the neighborhood of the key points in the waist region images of the heating head and micro / nano fiber, a local descriptor was constructed based on the gradient direction and scale information to describe the image structure around the key points. These descriptors are typically based on the gradient histogram or the statistical features of local image patches.

[0046] RANSAC algorithm:

[0047] A small subset of samples is randomly selected from the local descriptive subset of the depth images to construct a hypothetical left-right depth image alignment model for the heating head region. The selected samples are used to fit the model, and the predicted values ​​for other samples are calculated based on the fitted model. Based on the difference between the predicted and actual observation values, samples with a model fitting error less than a given threshold are considered inliers of the target heating head region and added to the inlier set. The accuracy and reliability of the model are measured by evaluating the number of inliers. If the number of inliers exceeds a predefined threshold, the left-right depth image alignment model for the heating head region is considered a qualified depth image alignment model; otherwise, the above steps are iteratively repeated.

[0048] Furthermore, after obtaining a qualified depth image alignment model, the matching feature points are transformed into points in three-dimensional space using the triangulation method to generate an initial sparse point cloud. Then, the Semi-Global Matching (SGM) algorithm is used to generate a dense point cloud model to fill the gaps between the point clouds in the area around the original heating head.

[0049] For each pixel in the original depth image of the heating head and the waist region of the micro / nano fiber, the SGM algorithm calculates disparity by computing the matching cost (pixel grayscale difference or other similarity measure) between pixels in the depth image. The calculated disparity value is then converted into depth values ​​or 3D coordinates of the pixels in the depth model of the heating head and the waist region of the micro / nano fiber using known camera parameters and triangulation methods. Based on the relationship between disparity and depth, the disparity of each pixel can be mapped to its corresponding 3D coordinates. By combining the 3D coordinates of all pixels, dense point cloud data representing the geometry of the waist region of the heating head and the micro / nano fiber and the surrounding scene is formed.

[0050] Furthermore, after obtaining dense point cloud data containing the three-dimensional coordinates of all pixels in the heating head, the waist region of the micro / nano fiber, and the surrounding scene, the support vector machine algorithm is used to segment the heating head model and the fiber waist region model. A coordinate system is established and the distance from the normal of the waist region unit to the inner wall of the heating head is calculated. If there is a waist region unit that is less than the safety threshold, a movement signal in the opposite direction is output to the heating head automatic correction module.

[0051] Furthermore, the Support Vector Machine (SVM) algorithm uses the point cloud coordinate data of the heating head and micro / nano fiber waist region model as features and maps them to a high-dimensional space through a kernel function to find a better hyperplane in nonlinear cases. By solving an optimization problem using the objective function and constraints of the SVM, a decision boundary is found that classifies the model sample points of the heating head and micro / nano fiber waist region model point cloud coordinate data into different categories. Then, the training sample points closest to the decision boundary are selected as support vectors to build an SVM classifier, which performs object segmentation on the new unlabeled heating head and micro / nano fiber waist region model point cloud data. The features of each point are input into the classifier, and the fiber waist region model and the heating head inner wall model are classified according to the classifier's output.

[0052] The distance from the waist region model to the inner wall model of the heating head is calculated based on point cloud coordinate data. The inner wall of the heating area of ​​the heating head is regarded as a cylindrical region with a cross-sectional diameter of about 1-2 mm, and the diameter of the micro-nano optical fiber is about 2-6 μm. Therefore, the tapered safety threshold is set to 100-200 μm. When there is a waist region unit smaller than the safety threshold, the movement signal in the opposite direction is output to the intelligent terminal 5.

[0053] Preferably, after receiving the movement signal from the intelligent image analysis module, the heating head automatic correction module decomposes the signal into two parts: the front-back direction and the vertical direction. It controls the guide rail to move the heating head back and forth, and controls the screw to move the heating head vertically, until the distance between the waist zone unit (which is less than the safety threshold) and the inner wall of the heating head is greater than or equal to the safety threshold.

[0054] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0055] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0056] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0057] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An intelligent visual monitoring system, characterized by: Based on the fiber optic tapering device, the intelligent visual monitoring system includes a depth image acquisition module, an intelligent image analysis module, and a heating head automatic correction module; The depth image acquisition module acquires depth images of the heating grooves on the left and right sides of the ceramic heating head (3) and the waist area of ​​the tapered micro-nano optical fiber through a depth image acquisition device and transmits them to the smart terminal. The intelligent image analysis module reconstructs the model of the micro-nano fiber waist region and the heating inner wall inside the ceramic heating head (3) in real time using the acquired depth image, and calculates the distance of each unit length in the waist region from the inner wall. The automatic correction module for the heating head, when the distance between a certain unit length in the waist area and the inner wall is less than the safety threshold, finely adjusts the guide rail and screw of the heating device through the program to move the inner wall away from the waist area to a distance greater than the safety threshold, so as to avoid the situation of melting or mechanical breakage caused by the heating head contacting the waist area during the tapering process. The fiber taper device includes a micro-nano fiber taper stage (1), an electric heating stage (2), a ceramic heating head (3), a depth camera (4), a smart terminal (5), an electric screw (6), and an electric guide rail (7). The electric heating platform (2), depth camera (4), electric screw (6) and electric guide rail (7) are all electrically connected to the smart terminal (5) via wires.

2. The intelligent visual monitoring system according to claim 1, characterized in that: There are two micro-nano fiber tapered platforms (1). The two micro-nano fiber tapered platforms (1) are respectively located on the left and right sides of the electric guide rail (7). The micro-nano fiber tapered platform (1) is the main device for preparing micro-nano fibers based on the flame brush principle. The electric heating stage (2) is located in the middle of the electric guide rail (7) and is located on the right side of the micro-nano fiber tapered platform (1).

3. The intelligent visual monitoring system of claim 2, wherein: The outer surface of the electric screw (6) is threaded with a lifting plate, and the electric heating table (2) is fixedly installed at the rear end of the lifting plate; The ceramic heating head (3) is installed in the middle of the rear side of the electric heating stage (2) and is located in the middle of the two micro-nano fiber tapered stages (1). There are two depth cameras (4). The two depth cameras (4) are fixedly installed on the cantilever on the left and right sides of the ceramic heating head (3), and the camera ends of the two depth cameras (4) are respectively aligned with the left and right sides of the ceramic heating head (3).

4. The intelligent visual surveillance system of claim 3, wherein: The depth image acquisition module starts working after the signal is received at the beginning of the tapering process of the electrically heated flame brush micro-nano fiber tapering device. Before each image acquisition cycle begins, the acquisition parameters are adjusted according to specific needs to avoid image distortion. Then, two depth image acquisition devices mounted on the far side of the electric heating platform (2) periodically acquire depth images of the heating groove and the waist area of ​​the tapered micro-nano fiber and transmit them into the smart terminal (5).

5. The intelligent visual monitoring system according to claim 4, characterized in that: After receiving the image from the depth image acquisition module, the intelligent image analysis module performs image alignment, point cloud generation and registration, and Poisson reconstruction steps to 3D reconstruct the model of the micro-nano fiber waist region and the heating inner wall of the ceramic heating head (3) based on two depth images. Then, the support vector machine algorithm is used to segment the heating head and fiber waist region and establish a three-dimensional coordinate system.

6. The intelligent visual monitoring system according to claim 4 or 5, characterized in that: The heating head automatic correction module, after receiving the movement signal from the intelligent image analysis module, decomposes the signal into two parts: front and back and up and down. It controls the electric guide rail (7) to move the electric heating platform (2) back and forth, and controls the electric screw (6) to move the electric heating platform (2) up and down, until the distance between the waist zone unit (less than the safety threshold) and the inner wall of the heating head is greater than or equal to the safety threshold.

7. The intelligent visual surveillance system of claim 1, wherein: The intelligent image analysis module performs 3D reconstruction of the model of the waist region of the micro-nano fiber inside the ceramic heating head and the inner wall of the heating head, and calculates the distance of the waist region normal to the inner wall of the heating head. If there is no unit length less than the safety threshold, the image acquisition will restart in a loop. If there is a unit length less than the safety threshold, a movement signal will be output to make the heating head automatic correction module correct the position of the waist region until the distance of the waist region unit less than the safety threshold from the inner wall of the heating head is greater than or equal to the safety threshold. If the tapering process end signal is not received, the image acquisition work will be restarted. If the tapering process end signal is received, the entire system process will end.

8. The intelligent visual surveillance system of claim 7, wherein: The images acquired by the depth image acquisition module are transmitted to the intelligent image analysis module. The data analyzed by the intelligent image analysis module is transmitted to the heating head automatic correction module, which controls the movement range of the electric heating table (2).

Images