Efficient urban rail return rail state intelligent monitoring device

Abstract

The invention relates to the field of rail detection, in particular to an efficient urban rail return rail state intelligent monitoring device which comprises a mounting seat, a base, a telescopic mechanism, a monitoring unit and a sweeping mechanism. The telescopic mechanism comprises a connecting sleeve and a connecting plate, and the connecting plate can move along the connecting sleeve and has a position locking function; the monitoring unit comprises a shell, a controller and a lens; the lens is integrally provided with a laser emission module and an image acquisition module; the laser emission module is used for irradiating laser on the backflow rail; the image acquisition module is used for carrying out photographing and image acquisition on the backflow rail irradiated by the laser and transmitting an image to the controller; the controller comprises a signal receiving module, a preprocessing module, an algorithm processing module, an image display module and a data storage module; the cleaning mechanism is configured to complete circulating cleaning of the lens in a preset time; manual operation is not needed, time and labor are saved, meanwhile, comprehensive detection can be achieved, and the inspection efficiency of the backflow rail can be better improved.

Description

Technical Field

[0001] The invention relates to the technical field of track detection and return rail monitoring, and in particular to a highly efficient intelligent monitoring device for the return rail state of an urban track. Background Art

[0002] Since conventional urban rail transit lines use rails as return poles, the scattered stray currents around them corrode metal parts such as the surrounding underground municipal pipe networks and building structures. Although the process is slow, the long-term harm is great. More and more subway companies use a dedicated rail for return. Among them, the lower surface of the return rail is only 200mm away from the upper surface of the track. The traditional way to check the status of the return rail is for the staff to use the inspection record method, lying on the ground or using a reflector to check; especially when working at night, the brightness is not enough, the horizontal distance between the return rail and the track is less than 800mm, and the space between the return rail and the track is not sufficient to check the status of the equipment. The use of a reflector makes it unclear to check the status of the internal bolts due to light problems. This traditional inspection method not only has problems such as low efficiency, high labor intensity, and long inspection cycle, but also has the disadvantages of not being able to discover hidden dangers in time and the night inspection flashlight affecting the reflector viewing. These are not conducive to the scientific evaluation management and planned maintenance of the return rail.

[0003] According to the known prior art, the third rail inspection system of the subway comprehensive inspection vehicle provided by Guangzhou Metro Company has the following characteristics: it mainly inspects the lower surface status of the return rail and can continuously analyze the wear of the return rail, but it also has disadvantages: it cannot check the status of the internal fixing bolts of the return rail, nor can it view the status of the return rail in real time. It can only download the data after returning to the section. For this reason, we need an efficient intelligent monitoring device for the status of the return rail of urban rails. Summary of the invention

[0004] In order to solve the above-mentioned shortcomings and deficiencies of the return rail status monitoring in the prior art, the present invention provides an urban rail return rail status intelligent monitoring device with reasonable structural design, no need for manual operation, saving time and labor, capable of comprehensive detection, and able to improve inspection efficiency.

[0005] The present invention adopts the following technical solutions to achieve the above purpose:

[0006] A highly efficient intelligent monitoring device for the return rail state of an urban rail, comprising a mounting seat, a base, a telescopic mechanism, a monitoring unit and a cleaning mechanism; the mounting seat is vertically distributed, and a fastening bolt that can be moved up and down is provided on the side to complete the connection and installation at different heights with the external rail body; the telescopic mechanism comprises a connecting sleeve and a connecting plate; one end of the connecting sleeve is arranged on the mounting seat, and the other end is sleeved with the connecting plate, and the connection between the connecting sleeve and the connecting plate is inclinedly distributed as a whole, and is configured so that the connecting plate can move along the connecting sleeve and has a position locking function; the base is arranged on the connecting plate and maintained in a horizontal distribution, and a fixing hole is opened in the center of the base; the monitoring unit comprises a shell, a controller and a lens; the shell is cylindrically distributed and can be detachably fixedly installed at the fixing hole, a through hole is provided on the upper end of the shell, the lens is fixedly installed at the through hole, and the lens is integrated with a laser light source emitting module and an image acquisition module; the laser light source emitting module is used to transmit the light source of the laser structure The laser is irradiated on the return rail; the image acquisition module is used to take pictures and collect images of the return rail irradiated by the laser, and transmit the image to the controller; the controller includes a signal receiving module, a preprocessing module, an algorithm processing module, an image display module and a data storage module; the signal receiving module is used to receive data information and image information from the image acquisition module, and define the data endpoint information and image endpoint information of the return rail under a unit distance as labels, and display them on the page in the form of tabs, and click different labels to display and view the return rail status under different endpoints; the preprocessing module is used to filter the image and data information, and centrally filter out the real-time detection data of the surface of the laser-emitting return rail, and has a keyword search function for editing, authority review, and deletion of the endpoint information content; the algorithm processing module is used to compare and algorithmically process the surface detection information data of the laser-emitting return rail processed by the preprocessing module to identify the abnormal state points of the return rail;

[0007] The algorithm formula includes:

[0008]

[0009] The moving average-convolution method is used to smooth the data; where f is the original data; f warning is the smoothed data; M is the size of the smoothing window, usually an odd number, such as 3, 5, 7, and so on; i and J represent the serial numbers of the collected sample data;

[0010] Then calculate the first-order derivative of the smoothed data to find possible extreme points:

[0011] f′[i]=f warning [i+1]-f warning [i]

[0012] Identify the peak value: traverse the derivative data and find the points where the derivative changes from positive to negative. These points correspond to local maxima (peak values). If f′[i]>0 and f′[i+1]<0, then i is the index of a local extreme value, which is also the abnormal warning point of the return rail state.

[0013] The data storage module is responsible for storing relevant information of images and data in the form of EXCEL forms in units of days, wherein the information of images and data includes the line name, address, type, description, image acquisition information, laser detection data information of the return rail, and management of its editing, addition, deletion and modification, and supports keyword search function; the image display module is used to display the information of all labels in the form of trees and tables, and provide endpoint information available in the label library, wherein the breakpoint information includes the current position information of the return rail, rail thickness information, rail wear information, rail connection bolt status information, and keyword search function information for label editing, authority review, and deletion; the cleaning mechanism is configured to complete the cyclic cleaning of the lens at a preset time to ensure that the lens performs high-definition shooting operations normally.

[0014] As a preferred technical solution: symmetrically distributed mounting grooves are provided on the side of the mounting seat, and the mounting grooves are distributed vertically; a concave structure pad is also provided at the mounting groove, a mounting hole is opened in the center of the pad, and a guide block is provided at the lower end of the pad; a guide groove is also opened on one side of the mounting groove, and the guide block is kept matched with the guide groove for installation; the fastening bolt passes through the mounting hole and completes the fastening installation with the rail car body; a spring is also sleeved and installed on the fastening bolt.

[0015] A further preferred technical solution is that scale lines are also provided on the outside of the guide groove.

[0016] A further preferred technical solution: the connection between the connecting sleeve and the connecting plate is overall distributed with an inclination of 30-75 degrees.

[0017] A further preferred technical solution: a connecting hole is provided on the upper end surface of the connecting sleeve, and an elastic plate is also provided at the connecting hole. The elastic plate and the connecting sleeve are an integrally formed structure, and a pull ring is provided on the upper end surface of the elastic plate; a plurality of evenly distributed first ratchets are provided on the lower end surface of the elastic plate; a plurality of evenly distributed second ratchets are also provided on the connecting plate, and the first ratchets are matched and installed with the second ratchets to ensure that the connecting plate can only be stretched and moved outward relative to the connecting sleeve.

[0018] A further preferred technical solution: the controller further includes a GPS positioning module, which is used to provide the position coordinate information of the current lens and the image acquisition module in real time, and to mark the lower right corner of the photographed image.

[0019] A further preferred technical solution: the image acquisition module adopts a 2D anti-shake motion camera to quickly capture the image stream of the lower surface of the return rail and the internal bolts of the insulating bracket during the movement process; wherein the 2D anti-shake motion camera completes the photo taking by means of a high-brightness light source and an ultra-low exposure time within 1 / 10000s.

[0020] A further preferred technical solution: the cleaning mechanism includes a rotating motor, a driving wheel, a driven wheel, a rotating rod and a sponge; the rotating motor is arranged in a base, the driving wheel is rotatably arranged on the rotating motor, and the driving wheel is a semicircular gear; the driven wheel is rotationally connected to the base through a support shaft, and the driven wheel and the driving wheel maintain meshing transmission; the rotating rod is fixedly installed on the support shaft, the sponge is wrapped and installed on the end of the rotating rod, and the sponge is in extrusion contact with the lens to complete the intermittent reciprocating cycle cleaning operation of the lens.

[0021] A further preferred technical solution: the cleaning mechanism includes a water tank, a water pump, a water spray pipe and a nozzle; the water tank is arranged in the base and is provided with a water inlet; the water pump is arranged in the water tank, one end of the water spray pipe is connected to the water pump and the other end is connected to the nozzle; the nozzle is fixedly installed on the base and faces the lens.

[0022] A further preferred technical solution is as follows: an arc-shaped diversion tip is provided on the front side of the base; and a high-brightness compensation light strip is provided around the edges of the base.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: the monitoring device has a reasonable structural design, and a mounting seat and fastening bolts that can be moved up and down are provided to complete the connection and installation with the rail car body at different heights, which mainly realizes the reasonable adjustment of the distance between the lens and the lower surface of the return rail, and on the basis of achieving the connection and installation of the monitoring unit such as the lens, the purpose of sufficiently high-definition shooting is achieved; the retractable design of the connecting sleeve and the connecting plate is further adopted to reasonably adjust the setting requirements of different spacings, further achieve the purpose of diversified adjustment and adaptive detection of the return rail, and avoid the problems of time-consuming and labor-intensive manual inspection, low efficiency, high labor intensity and long detection cycle in the prior art; it realizes the use of the movement of the rail car body to complete the status detection of the return rail of the entire line, without manual operation, saving time and labor, and being more efficient; the cooperation of the rotating motor, the driving wheel, the driven wheel, the rotating rod and the sponge body is further provided to realize the timely cleaning of the camera lens, and further ensure the clarity and accuracy of image acquisition;

[0024] The monitoring device further adopts a detachable shell structure to facilitate maintenance work on the internal controller, and at the same time, the laser is irradiated on the return rail through the light source of the laser structure; by using a 2D motion camera, the lower surface of the return rail and the internal fixing bolts of the insulating bracket can be quickly captured during the movement, and the status photos of each component at the position are displayed through the image display module, and the image is transmitted to the controller at the same time; then, through the reception and processing of images and data, the laser emission return rail surface detection information data is compared and algorithmically processed to identify the abnormal state points of the return rail; at the same time, the capture trigger conditions are optimized, and the exposure is completed within 1 / 10000s by a high-brightness light source plus an ultra-low exposure time. Such a short time is much shorter than the vibration period, and the capture is completed before or during the jitter, so as to prevent the jitter caused by the instability of the auxiliary maintenance vehicle during the forward process from affecting the screenshot of the photo; further achieving the purpose of being able to quickly, efficiently and accurately detect the return rail comprehensively, greatly improving the inspection efficiency of the return rail status, improving the degree of intelligent inspection, and being more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] Figure 1 It is a schematic diagram of the overall structure of a highly efficient intelligent monitoring device for the return rail state of urban rails according to the present invention;

[0027] Figure 2 A three-dimensional diagram of a mounting base of a highly efficient intelligent monitoring device for the return rail state of urban rails according to the present invention;

[0028] Figure 3 for Figure 2 Side view of

[0029] Figure 4 It is a partial structural diagram of the telescopic mechanism of a highly efficient intelligent monitoring device for the return rail state of urban rails of the present invention;

[0030] Figure 5 for Figure 4 A magnified view of the structure of part A;

[0031] Figure 6 It is a cross-sectional view of a base of a highly efficient intelligent monitoring device for the return rail state of urban rails according to the present invention;

[0032] Figure 7 It is a partial schematic diagram of a cleaning mechanism of a highly efficient intelligent monitoring device for the return rail state of urban rails according to the present invention;

[0033] Figure 8 The present invention is a flow chart of the connection principle of a controller of a highly efficient intelligent monitoring device for the return rail status of urban rails.

[0034] In the figure: 1, mounting seat; 11, fastening bolt; 12, mounting groove; 13, pad; 14, guide block; 15, guide groove; 16, spring; 17, scale line; 18, mounting hole; 2, base; 21, fixing hole; 22, diverter tip; 3, telescopic mechanism; 31, connecting sleeve; 32, connecting plate; 33, connecting hole; 34, elastic plate; 35, pull ring; 36, first ratchet; 37, second ratchet; 4, monitoring unit; 41, housing; 42, controller; 421, signal receiving module; 42 2. Preprocessing module; 423. Algorithm processing module; 424. Image display module; 425. Data storage module; 426. GPS positioning module; 43. Lens; 431. Laser light source emission module; 432. Image acquisition module; 44. Through hole; 5. Cleaning mechanism; 51. Rotating motor; 52. Driving wheel; 53. Driven wheel; 531. Support shaft; 54. Rotating rod; 55. Sponge; 56. Water tank; 57. Water pump; 58. Water spray pipe; 59. Nozzle; 6. High-brightness compensation light bar. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that, in the specific implementation of the present invention, the terms such as "first" and "second" and other relational terms that may appear are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms such as "include", "comprise" or any other variants thereof that may appear are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the possible appearance of the sentence "including a ..." and other defined elements does not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0037] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "provided with" that may appear should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0038] Example 1: Figures 1 to 8 As shown:

[0039] An efficient intelligent monitoring device for the return rail state of urban rails includes a mounting seat 1, a base 2, a telescopic mechanism 3, a monitoring unit 4 and a cleaning mechanism 5. The mounting seat 1 is vertically distributed, and a fastening bolt 11 that can be moved up and down is provided on the side to complete the connection and installation with the rail body at different heights. Specifically, refer to Figure 2 The structure shown is as follows: the side of the mounting seat 1 is provided with mounting grooves 12 which are symmetrically distributed front and back. The mounting grooves are through structures, and the mounting grooves 12 are kept vertically distributed. The purpose of such arrangement is to facilitate the adjustment of the mounting height by moving up and down. A concave-shaped pad 13 is also provided at the mounting groove 12, and a mounting hole 18 is provided in the center of the pad 13. A guide block 14 is provided at the lower end of the pad 13; the pad and the guide block are fixedly connected, and a guide groove 15 is also provided on one side of the mounting groove 12, and the guide block 14 is kept matched with the guide groove 15 for installation. The purpose of such arrangement is to guide sliding. The fastening bolt 11 passes through the mounting hole and is fastened to the rail car body; a small auxiliary bolt is also provided on one side of the pad, which is used to assist in fixing the pad after the fastening bolt is adjusted in height along the mounting groove. A triangular-shaped indicating end is also provided on one side of the pad, which is used to indicate the position of the scale line.

[0040] like Figure 3As shown: wherein, a spring 16 is also sleeved and installed on the fastening bolt 11. The purpose of setting the spring is to achieve a certain buffering and shock absorption purpose. A scale line 17 is also provided on the outside of the guide groove 15. With such a configuration, a single fastening hole is provided on one side of the rail car body, and the size of the mounting seat is known. Therefore, the position of the fastening bolt moving along the mounting groove can be adjusted and then connected and installed with the fastening hole on the side of the external rail car body, so as to achieve the adjustment of the position height of the lens of the monitoring unit on the mounting seat side relative to the lower surface of the return rail. The rail car is equipped with the return rail intelligent monitoring equipment, which can realize that the monitoring unit can capture the lower surface of the return rail and the internal bolts of the insulating bracket during the movement of the rail car. At the same time, the high-brightness compensation light bar assists in light compensation and the anti-shake function of the 2D anti-shake motion camera can ensure that the clarity of the photos taken of the return rail is sufficient to meet the viewing and judgment of the maintenance personnel through the mobile device terminal.

[0041] In this way, the problem that the lower surface of the return rail is only 200mm away from the upper surface of the track, and the maintenance personnel cannot check the lower surface and the internal bolt status, and need to lie on the ground or use a reflector to check. At the same time, when working at night, the brightness is not enough, the horizontal distance between the return rail and the track is less than 800mm, and the space between the return rail and the track is not sufficient for personnel to check the equipment status. The problem of unclear internal bolt status due to light problems when using a reflector is provided for the subsequent efficient and intelligent comprehensive detection of the return rail, and can also improve the efficiency of inspection operations.

[0042] like Figure 1 As shown: In this embodiment, the telescopic mechanism 3 includes a connecting sleeve 31 and a connecting plate 32. One end of the connecting sleeve 31 is arranged on the mounting seat 1, and the other end is connected with the connecting plate 32. The connection between the connecting sleeve 31 and the connecting plate 32 is inclined as a whole, and the connecting plate 32 is configured to move along the connecting sleeve 31 and has a position locking function. Specifically, referring to Figure 4As shown: the connection between the connecting sleeve 31 and the connecting plate 32 is distributed with an inclination of 30-75 degrees as a whole. Such a setting makes it easy to locate the monitoring unit on the lower surface of the return rail, while improving the supporting strength of the overall device and ensuring stability. The connecting sleeve and the mounting seat are connected and fixed by welding. A connecting hole 33 is provided on the upper end surface of the connecting sleeve 31, and the connecting hole is a through-groove structure. An elastic plate 34 is also provided at the connecting hole 33. The elastic plate 34 and the connecting sleeve 31 are an integrally formed structure, and a pull ring 35 is provided on the upper end surface of the elastic plate 34. A plurality of uniformly distributed first ratchet teeth 36 are provided on the lower end surface of the elastic plate 34. A plurality of uniformly distributed second ratchet teeth 37 are also provided on the connecting plate 32. The first ratchet teeth 36 and the second ratchet teeth 37 are matched and installed, and the connecting plate 32 can only be stretched outward relative to the connecting sleeve 31. With such a setting, the ratchet matching has the effect of unidirectional movement, and also has the stability of fixed position. Therefore, in this embodiment, the connecting plate 32 can move freely outward in one direction to achieve the purpose of elongation.

[0043] like Figure 5 As shown: In the initial state, the overall length between the connecting plate and the connecting sleeve is in the shortest state. The staff can make adaptive adjustments according to the spacing between the rail car and the return rail. When the length of the connecting plate pulled out of the connecting sleeve is too long, the staff can pull the pull ring upwards, thereby driving the elastic plate to move outward, so that the first ratchet and the second ratchet are separated, and then the staff moves the connecting plate inward to realize the return operation. The monitoring device has a reasonable structural design. By setting a mounting seat and a fastening bolt that can move up and down to complete the connection and installation at different heights with the rail car body, it mainly realizes the reasonable adjustment of the spacing between the lens and the lower surface of the return rail. On the basis of achieving the connection and installation of the monitoring unit such as the lens, the purpose of sufficiently high-definition shooting is achieved; the retractable design of the connecting sleeve and the connecting plate is further adopted to reasonably adjust the setting requirements of different spacings, further achieving the purpose of diversified adjustment and adaptive detection of the return rail, avoiding the problems of time-consuming and labor-intensive manual inspection in the prior art, low efficiency, high labor intensity, and long detection cycle; it realizes the use of the movement of the rail car body to complete the state detection of the return rail of the entire line, without manual operation, saving time and effort, and being more efficient.

[0044] Reference Figure 1Structure shown: In this embodiment, the base 2 is arranged on the connecting plate 32 and maintained in a horizontal distribution, and the two are fixed by welding. A fixing hole 21 is provided in the center of the base 2; an arc-shaped diversion tip 22 is also provided on the front side of the base 2; the purpose of such a setting is to optimize the base structure to reduce the obstruction of the airflow and avoid impact on the lens and other structures. A highlight compensation light bar 6 is also provided on the edges around the base 2. The power supply of the highlight compensation light bar is provided by a battery arranged in the base. Light compensation uses surface light source technology, which can compensate for the problem of insufficient light, and further assists the 2D anti-shake motion camera to capture screenshots of the return rail to ensure the clarity of the photos.

[0045] like Figure 6 As shown: In this embodiment, the monitoring unit 4 includes a housing 41, a controller 42 and a lens 43. The monitoring unit irradiates the laser onto the return contact rail through a laser structure light source, and at the same time, the visual sensor of the 2D anti-shake camera takes a photo of the contact rail image irradiated by the laser, and then transmits the image to the inspection controller, and the image processing unit performs data analysis on the image, and combines computer vision measurement technology and digital image processing technology (the principle of 2D anti-shake motion camera is the existing technology) to quickly obtain the geometric parameters of the subway return contact rail, thereby accurately realizing non-contact, efficient and intelligent detection of the subway return contact rail. The screenshots are convenient for maintenance personnel to view. The monitoring unit can also locate the location of the photo and store the captured photos for subsequent management.

[0046] like Figure 6As shown: wherein, the housing 41 is cylindrically distributed and detachably fixedly installed at the fixing hole 21, specifically, the connection between the housing and the fixing hole can be installed by threaded connection. The upper end of the housing 41 is provided with a through hole 44, and the lens 43 is adapted to be fixedly installed at the through hole 44, and the lens 43 is integrated with a laser light source emitting module 431 and an image acquisition module 432. The laser light source emitting module 431 is used to irradiate the laser on the return rail through the light source of the laser structure. The image acquisition module 432 is used to take pictures and collect images of the return rail irradiated by the laser, and transmit the image to the controller 42. The lens and the controller realize data communication transmission through the RS485 interface. The image acquisition module 432 uses a 2D anti-shake motion camera to quickly capture the picture stream of the lower surface of the return rail and the internal bolts of the insulating bracket during the movement process. The use of a 2D motion camera can quickly capture the picture stream of the lower surface of the return rail and the internal bolts of the insulating bracket during the movement process, and display the status photos of each component at this position through the image display module. Among them, the 2D anti-shake sports camera completes the photo taking by means of a high-brightness light source and an ultra-low exposure time within 1 / 10000s; the snapshot trigger conditions are optimized, and the exposure is completed within 1 / 10000s by means of a high-brightness light source and an ultra-low exposure time. Such a short time is much shorter than the vibration period, and the snapshot is completed before or during the shaking, preventing the monitoring unit from shaking during the forward process due to the instability of the auxiliary maintenance vehicle during operation, which affects the screenshot of the photo.

[0047] like Figure 8 As shown: In this embodiment, the controller 42 includes a signal receiving module 421, a preprocessing module 422, an algorithm processing module 423, an image display module 424 and a data storage module 425. The signal receiving module 421 is used to receive the data information and image information of the image acquisition module 432, and define the data endpoint information and image endpoint information of the return rail under a unit distance as a label, and display them on the page in the form of a tab page, and click different labels to display and view the return rail status under different endpoints. The data information includes the laser ranging data on the surface of the return rail, etc., which is used to determine the loss of the return rail. The image information is a photographed image, which is used for the staff to view and understand the real-time status of the return rail. The preprocessing module 422 is used to filter the image and data information, and centrally screen out the real-time detection data of the laser emission return rail surface, and has the keyword search function of editing, authority review, and deletion of the data endpoint information content. The algorithm processing module 423 is used to compare and perform algorithm processing on the laser emission return rail surface detection information data processed by the pre-processing module 422 to identify the abnormal state points of the return rail; wherein the algorithm formula includes:

[0048]

[0049] The moving average-convolution method is used to smooth the data; where f is the original data; f warning is the smoothed data; M is the size of the smoothing window, usually an odd number, such as 3, 5, 7, and so on; i and J represent the serial numbers of the collected sample data;

[0050] Then calculate the first-order derivative of the smoothed data to find possible extreme points:

[0051] f′[i]=f warning [i+1]-f warning [i]

[0052] Identify peaks: traverse the derivative data and find the points where the derivative changes from positive to negative. These points correspond to local maxima (peaks). If f′[i]>0 and f′[i+1]<0, then i is the index of a local extreme value. This is also the abnormal warning point of the return rail status. The abnormal warning points include the return rail’s severely corroded locations (different thicknesses) and abnormally loose bolts.

[0053] like Figure 8 As shown: In this embodiment, the data storage module 425 is responsible for storing the relevant information of the image and data, and stores it in the form of an EXCEL form in units of days, wherein the information of the image and data includes the line name, address, type, description, image acquisition photo information, laser detection data information of the return rail, and the management of editing, addition, deletion and modification thereof, and supports keyword search functions. The image display module 424 is used to display the information of all labels in the form of a tree or table, and provide the endpoint information available in the label library, wherein the breakpoint information includes the current position information of the return rail, the thickness information of the rail body, the wear information of the rail body, the state information of the rail body connection bolts, and the keyword search function information of the editing, authority review and deletion of the label. Among them, the carrier of the image display module 424 is a mobile terminal, and the mobile terminal is any one of a mobile phone and a tablet computer. The data storage module 425 realizes data transmission with the mobile terminal through wireless network transmission and Bluetooth protocol transmission, so that the staff can view and manage the image through the APP program carried by the mobile terminal. The controller 42 further includes a GPS positioning module 426, which is used to provide real-time position coordinate information of the current lens 43 and the image acquisition module 432, and mark the position coordinate information in the lower right corner of the photographed image. This arrangement facilitates quick response and maintenance operations by the staff, further ensuring the normal use of the return rail.

[0054] like Figure 1As shown: In this embodiment, the cleaning mechanism 5 is configured to complete the cyclic cleaning of the lens 43 at a preset time to ensure that the lens 43 can perform high-definition shooting operations normally. Specifically, Figure 7 As shown: the cleaning mechanism 5 includes a rotating motor 51, a driving wheel 52, a driven wheel 53, a rotating rod 54 and a sponge 55. The rotating motor 51 is arranged in the base 2. The rotating motor adopts a servo control motor. The rotating motor is connected to a control switch. The staff can control it through the switch connected by a line, and can also realize automatic control through a PLC controller. The driving of the rotating motor is realized by connecting a battery. And the driving wheel 52 is rotatably arranged on the rotating motor 51, and the driving wheel 52 is a semicircular gear; the driven wheel 53 is connected to the base 2 through a support shaft 531, and the support shaft and the base are connected by a bearing to keep relative rotation and cannot move relative to each other; the support shaft and the driven wheel are connected and fixed. And the driven wheel 53 and the driving wheel 52 maintain meshing transmission. The purpose of such a setting is to ensure the reciprocating swinging operation of the rotating rod by driving the rotating motor forward and reverse. The rotating rod 54 is fixedly mounted on the support shaft 531, and the sponge 55 is wrapped around the end of the rotating rod 54, and the sponge 55 is pressed and contacted with the lens 43 to complete the intermittent reciprocating cycle cleaning operation of the lens 43. In the initial state, the rotating rod is located at the rear side of the base.

[0055] Example 2: Figure 1 and Figure 6 As shown: Based on Example 1, an efficient urban rail return rail state intelligent monitoring device also includes: the cleaning mechanism 5 includes a water tank 56, a water pump 57, a water spray pipe 58 and a nozzle 59. The water tank 56 is arranged in the base 2 and is provided with a water inlet; the water inlet is connected to a water pipe, and a switch valve is arranged on the water pipe to facilitate the liquid replenishment operation. A mixed liquid with a detergent can be added to the water tank to further improve the cleaning effect of the lens. The water pump 57 is arranged in the water tank 56, one end of the water spray pipe 58 is connected to the water pump 57, and the other end is connected to the nozzle 59; the nozzle 59 is fixedly installed on the base 2 and faces the lens 43. Among them, the driving of the water pump is realized by connecting a battery. In this way, when the water pump is started, the water flow can be used to flush the lens, and further under the swinging friction of the sponge, the deep cleaning of the lens is completed, and the cleanliness of the outer surface of the lens is further ensured, providing a favorable basis for subsequent high-definition shooting.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An efficient intelligent monitoring device for the return rail status of urban rail, characterized by: It includes a mounting seat, a base, a telescopic mechanism, a monitoring unit and a cleaning mechanism; the mounting seat is vertically distributed, and a fastening bolt that can be moved up and down is provided on the side to complete the connection and installation at different heights with the external rail car body; the telescopic mechanism includes a connecting sleeve and a connecting plate; one end of the connecting sleeve is arranged on the mounting seat, and the other end is sleeved with the connecting plate, and the connection between the connecting sleeve and the connecting plate is overall inclined, and is configured so that the connecting plate can move along the connecting sleeve and has a position locking function; the base is arranged on the connecting plate and keeps a horizontal distribution, and a fixing hole is opened in the center of the base; the monitoring unit includes a shell, a control The housing is cylindrical and can be detachably fixedly mounted at the fixing hole. A through hole is provided at the upper end of the housing. The lens is fixedly mounted at the through hole, and the lens is integrated with a laser light source emitting module and an image acquisition module. The laser light source emitting module is used to irradiate the return rail with laser through the light source of the laser structure. The image acquisition module is used to take pictures and collect images of the return rail irradiated by the laser, and transmit the image to the controller. The controller includes a signal receiving module, a preprocessing module, an algorithm processing module, an image display module and a data storage module. The signal receiving module is used to receive data information and image information from the image acquisition module, and define the data endpoint information and image endpoint information of the return rail under unit distance as labels, and display them on the page in the form of tabs, and click different labels to display and view the return rail status under different endpoints; The preprocessing module is used to filter the image and data information, and centrally screen out the real-time detection data of the laser emission return rail surface, and has the keyword search function of editing, authority review, and deletion of the endpoint information content; the algorithm processing module is used to compare and algorithmically process the laser emission return rail surface detection information data processed by the preprocessing module to identify the abnormal state points of the return rail; wherein the algorithm formula includes: The moving average-convolution method is used to smooth the data; where f is the original data; f waening is the smoothed data; M is the size of the smoothing window, usually an odd number, such as 3, 5, 7, and so on; i and J represent the serial numbers of the collected sample data; Then calculate the first-order derivative of the smoothed data to find possible extreme points: f′[i]=f warning [i+1]-f warning [i] Identify the peak value: traverse the derivative data and find the points where the derivative changes from positive to negative. These points correspond to local maxima (peak values). If f′[i]>0 and f′[i+1]<0, then i is the index of a local extreme value, which is also the abnormal warning point of the return rail state. The data storage module is responsible for storing relevant information of images and data in the form of EXCEL forms in units of days, wherein the information of images and data includes the line name, address, type, description, image acquisition information, laser detection data information of the return rail, and management of its editing, addition, deletion and modification, and supports keyword search function; the image display module is used to display the information of all labels in the form of trees and tables, and provide endpoint information available in the label library, wherein the breakpoint information includes the current position information of the return rail, rail thickness information, rail wear information, rail connection bolt status information, and keyword search function information for label editing, authority review, and deletion; the cleaning mechanism is configured to complete the cyclic cleaning of the lens at a preset time to ensure that the lens performs high-definition shooting operations normally.

2. The high-efficiency intelligent monitoring device for the return rail state of urban rail according to claim 1, characterized in that: Symmetrically distributed mounting grooves are provided on the side of the mounting seat, and the mounting grooves are distributed vertically; a concave structure pad is also provided at the mounting groove, a mounting hole is provided in the center of the pad, and a guide block is provided at the lower end of the pad; a guide groove is also provided on one side of the mounting groove, and the guide block is kept matched with the guide groove for installation; the fixing bolt passes through the mounting hole and completes the fixing installation with the rail car body; a spring is also sleeved and installed on the fixing bolt.

3. The high-efficiency intelligent monitoring device for the return rail state of urban rail according to claim 2, characterized in that: Scale lines are also arranged on the outside of the guide groove.

4. The high-efficiency intelligent monitoring device for the return rail state of urban rail according to claim 3, characterized in that: The connection between the connecting sleeve and the connecting plate is generally distributed with an inclination of 30-75 degrees.

5. The high-efficiency intelligent monitoring device for the return rail state of urban rail according to claim 4, characterized in that: A connecting hole is provided on the upper end surface of the connecting sleeve, and an elastic plate is also provided at the connecting hole. The elastic plate and the connecting sleeve are an integrally formed structure, and a pull ring is provided on the upper end surface of the elastic plate; a plurality of evenly distributed first ratchets are provided on the lower end surface of the elastic plate; a plurality of evenly distributed second ratchets are also provided on the connecting plate, and the first ratchets are matched and installed with the second ratchets to ensure that the connecting plate can only be stretched and moved outward relative to the connecting sleeve.

6. The high-efficiency intelligent monitoring device for the return rail state of urban rail according to claim 5, characterized in that: The controller also includes a GPS positioning module, which is used to provide real-time position coordinate information of the current lens and the image acquisition module, and to perform marking processing on the lower right corner of the photographed image.

7. The high-efficiency intelligent monitoring device for the return rail state of urban rail according to claim 6, characterized in that: The image acquisition module adopts a 2D anti-shake motion camera to quickly capture the image stream of the lower surface of the return rail and the internal bolts of the insulating bracket during the movement process; the 2D anti-shake motion camera completes the photo taking by using a high-brightness light source and an ultra-low exposure time of 1 / 10000s.

8. The high-efficiency intelligent monitoring device for the return rail state of urban rail according to claim 7, characterized in that: The cleaning mechanism includes a rotating motor, a driving wheel, a driven wheel, a rotating rod and a sponge; the rotating motor is arranged in a base, the driving wheel is rotatably arranged on the rotating motor, and the driving wheel is a semicircular gear; the driven wheel is rotationally connected to the base through a support shaft, and the driven wheel and the driving wheel are meshed and transmitted; the rotating rod is fixedly installed on the support shaft, the sponge is wrapped and installed on the end of the rotating rod, and the sponge is in compression contact with the lens to complete the intermittent reciprocating cycle cleaning operation of the lens.

9. The high-efficiency intelligent monitoring device for the return rail state of urban rail according to claim 8, characterized in that: The cleaning mechanism includes a water tank, a water pump, a water spray pipe and a nozzle; the water tank is arranged in the base and is provided with a water inlet; the water pump is arranged in the water tank, one end of the water spray pipe is connected to the water pump, and the other end is connected to the nozzle; the nozzle is fixedly installed on the base and faces the lens.

10. The high-efficiency intelligent monitoring device for the return rail state of urban rail according to claim 9, characterized in that: An arc-shaped diversion tip is also arranged on the front side of the base; and a high-brightness compensation light strip is also arranged on the edges around the base.

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