CN114909990A - Vehicle-mounted non-contact line abrasion measuring method, device and system - Google Patents
Vehicle-mounted non-contact line abrasion measuring method, device and system Download PDFInfo
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- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
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Abstract
The invention provides a vehicle-mounted non-contact line abrasion measuring method, device and system. According to the method, a contact line bottom contour curve picture is obtained, and a window range is reduced on the contact line bottom contour curve picture by using [ offset-range X, offset + range X ] after a pulling value offset of a contact line is obtained according to the position of a contact line bright spot in the picture; judging the left and right boundaries of the bottom surface contour of the contact line in the contact line bottom contour curve picture and calculating the pixel number occupied by the contact line in the picture; and calculating and storing the corresponding actual abrasion value through the pixel number. The invention can carry out on-line non-contact monitoring on the train state in the operation process and send out an alarm to record the abrasion value and the position information aiming at the contact line with larger abrasion, thereby reducing the manual measurement and efficiently obtaining the numerical value and finding the defects.
Description
Technical Field
The invention relates to the technical field of contact line detection, in particular to a vehicle-mounted non-contact line abrasion measuring method, device and system.
Background
In the electrified contact line, a transmission line erected along a steel rail is called a contact net, and the contact net is used for directly transmitting electric energy obtained from a traction substation to an electric locomotive for use. The electric locomotive is in direct contact with a contact line wire through a pantograph arranged on the roof of the electric locomotive to obtain current, and the pantograph and the contact line must be in reliable contact in order to ensure that the locomotive can obtain continuous and stable current. Therefore, the quality and geometric parameters of the contact line directly influence the transportation capacity of the electrified railway, and the contact line is ensured to be in a normal working area, so that the method has important significance for improving the current receiving quality and ensuring the power supply safety of the locomotive.
In recent years, urban contact line traffic is rapidly developed, and subway light rails are popularized as daily outgoing traffic tools. The reliability of the subway traction power supply system equipment and the safety in the operation process are important guarantees for the safe operation of the whole subway series, and in order to guarantee the safe operation of operation vehicles, the abrasion detection is carried out on a contact network in a high-speed operation state, and the improvement of the safety of urban contact line traffic operation by adopting a more intelligent, rapid and reliable high-end detection technology is particularly important.
It is necessary to provide a detection structure which can truly and accurately reflect the abrasion change of a contact line in the running of a train without influencing the original structure of a pantograph and has real-time performance. Therefore, a vehicle-mounted non-contact line wear measuring method, device and system are needed to solve the above problems.
Disclosure of Invention
The invention aims to provide a vehicle-mounted non-contact line abrasion measuring method, device and system, and solves the problems that the original structure of a pantograph cannot be influenced due to the lack of a detection structure, the change of contact line abrasion in the operation of a train can be truly and accurately reflected, and the real-time performance is realized.
In one aspect, a vehicle-mounted non-contact line abrasion measuring method comprises the following steps:
acquiring a contact line bottom contour curve picture, wherein the contact line bottom contour curve is irradiated on a contact line through a line laser to form a contact line contour curve and then is acquired by a high-definition area array camera additionally provided with a 808nm optical filter in front of a lens;
obtaining a pulling value OffsetX of the contact line according to the position of the contact line bright spot in the contact line bottom contour curve picture;
combining a gray level image with a bottom contour curve image of the contact line, solving a gray level value which accounts for more than 80% of the distribution of the gray level image, and solving an average gray level value Ave as a background gray level value;
according to the pull-out value OffsetX of the contact line, carrying out window range reduction operation on the contact line bottom contour curve picture by using [ OffsetX-range X, OffsetX + range X ];
judging left and right boundaries of the bottom surface contour of the contact line in the bottom contour curve picture of the contact line;
calculating the pixel number occupied by the contact line in the picture through the left and right boundaries of the bottom surface outline of the contact line;
and calculating and storing the corresponding actual abrasion value through the pixel number.
And further, acquiring a contact line bottom contour curve picture, wherein 808nm invisible light is selected in the step of acquiring the contact line bottom contour curve by a high-definition area array camera additionally provided with an 808nm optical filter in front of a lens after the contact line bottom contour curve is formed by irradiating the contact line through a line laser.
Further, obtaining a pull-out value OffsetX of the contact line according to the position of the contact line bright spot in the contact line bottom profile curve picture, includes:
firstly, a line laser irradiates on a contact line to form a short arc bright area;
and then acquiring a contact line short arc bright area picture presented by shooting through a high-speed area-array camera. Calculating to obtain the pixel coordinate position of the short arc bright area by combining template matching;
and finally, by means of a checkerboard calibration board, solving the matrix relation between the physical coordinate values and the pixel coordinate values, and completing the conversion between the pixel coordinates of the short arc bright area and the space physical coordinates.
Further, in the step of performing window range reduction operation on the contact line bottom profile curve picture by [ offset-range x, offset + range x ] according to the pull-out value offset of the contact line, the range x corresponds to the size of a view window required for accurately identifying the contact line profile; the purpose of RangeX is to focus the view window to a certain block area of the full picture.
Further, judging the left and right boundaries of the bottom surface contour of the contact line in the bottom contour curve picture of the contact line comprises:
one method is as follows: according to a background gray value Ave obtained by calculating the area-array camera picture, if gray values of continuous 5 pixels with central point pixel coordinates X1 are all kept at Ave, and 5 pixels with central point pixel coordinates X2 on the right side are all higher than Ave, the central pixel point X2 is the left boundary of the bottom surface contour of the contact line; if the gray values of the continuous 5 pixels with the central point pixel coordinate X1 are all maintained at Ave, and the continuous 5 pixels with the central point pixel coordinate X3 on the left side are all higher than Ave, the central pixel point X3 is the right boundary of the bottom surface contour of the contact line;
the second method is that if the gray value of the pixel point with the continuous 5 central point pixel coordinates X1 is higher than Ave, and the gray values of the continuous points with the right 5 central point pixel coordinates X2 are all higher than the gray value of X1, and the deviation is larger than delta A, the central pixel point X2 is the left boundary of the bottom surface contour of the contact line; if the gray value of the pixel point with the continuous 5 central point pixel coordinates X1 is higher than Ave, the gray values of the continuous points with the left 5 central point pixel coordinates X3 are higher than the gray value of X1, and the deviation is greater than delta A, the central pixel point X3 is the right boundary of the bottom surface contour of the contact line;
the brightness of a contact line abrasion area is high, the gray value is 255, and the delta A is set to be 100-150.
On the other hand, the invention also provides a vehicle-mounted non-contact line wear measuring device, which comprises:
the acquisition unit is used for acquiring a contact line bottom contour curve picture, wherein the contact line bottom contour curve is irradiated on a contact line through a line laser to form a contact line contour curve and then is acquired by a high-definition area array camera with an optical filter of 808nm additionally arranged in front of a lens;
the first calculation unit is used for obtaining a pull-out value OffsetX of the contact line according to the position of the contact line bright spot in the contact line bottom contour curve picture;
the second calculation unit is used for calculating a gray value which accounts for more than 80% of the distribution of the gray image according to the contact line bottom contour curve picture and the gray image, and calculating an average gray value Ave as a background gray value;
the first processing unit is used for carrying out window range reduction operation on the contact line bottom contour curve picture by [ OffsetX-range X, OffsetX + range X ] according to the pull-out value OffsetX of the contact line;
the judging unit is used for judging the left and right boundaries of the bottom surface outline of the contact line in the bottom outline curve picture of the contact line;
the third calculating unit is used for calculating the pixel number occupied by the contact line in the picture through the left and right boundaries of the bottom surface outline of the contact line;
and the second processing unit is used for calculating and storing the corresponding actual abrasion value through the number of pixels.
In addition, the invention also provides a vehicle-mounted non-contact line wear measuring system, which comprises a vehicle roof monitoring system and an in-vehicle computing and processing system;
the roof monitoring system comprises a laser imaging module and an image acquisition module; the laser imaging module comprises a high-power 808nm line laser generator assembled on the roof of the vehicle, and the line laser generator is perpendicular to the contact line; the image acquisition module comprises a high-speed linear array camera which is assembled on the roof of the vehicle and matched with the linear laser generator, and a camera lens with an optical filter is matched with the high-speed linear array camera;
the in-vehicle computing processing system comprises an industrial personal computer module and a wireless transmission module; the industrial personal computer module is a high-function industrial personal computer; the wireless transmission module is a 4G router and an antenna, and the high-function industrial personal computer is connected with the 4G router through the Ethernet.
The roof monitoring system is used for collecting and transmitting images; the in-vehicle computing and processing system is used for processing, analyzing and calculating the pictures acquired by the roof detection system, storing the values and uploading the values to the cloud;
the laser imaging module is used for irradiating the contact line with laser to present a contour curve of the bottom surface of the contact line;
the image acquisition module is used for acquiring a contour curve image of line laser light irradiated on the contact line and shooting the contour curve image of the line laser light irradiated from the side rear part by a high-speed area array camera at the rear side of the laser;
the industrial personal computer module is used for acquiring a contact line bottom contour curve picture, wherein the contact line bottom contour curve is irradiated on a contact line through a line laser to form a contact line contour curve and then acquired by a high-definition area array camera additionally provided with a 808nm optical filter in front of a lens; obtaining a pulling value OffsetX of the contact line according to the position of the contact line bright spot in the contact line bottom contour curve picture; combining a gray level image with a bottom contour curve image of the contact line, solving a gray level value which accounts for more than 80% of the distribution of the gray level image, and solving an average gray level value Ave as a background gray level value; according to the pulling value OffsetX of the contact line, carrying out window range reduction operation on the contact line bottom contour curve picture by [ OffsetX-range X, OffsetX + range X ]; judging left and right boundaries of the bottom surface contour of the contact line in the bottom contour curve picture of the contact line; calculating the pixel number occupied by the contact line in the picture through the left and right boundaries of the bottom surface outline of the contact line; calculating and storing the corresponding actual abrasion value through the pixel number;
and the wireless transmission module is used for uploading data to the cloud end through the router.
The invention has the following beneficial effects: the vehicle-mounted non-contact line abrasion measuring method, device and system provided by the invention can be used for carrying out online non-contact monitoring on the train state in the operation process and sending an alarm to record the abrasion value and position information aiming at a contact line with larger abrasion by using a non-contact dynamic contact line abrasion condition detecting system, thereby reducing manual measurement, efficiently obtaining a numerical value and finding defects.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic flow chart of a method for measuring contact line wear in a vehicle-mounted non-contact manner according to an embodiment of the present invention;
fig. 2 is a schematic view of a vehicle-mounted non-contact line wear measuring device according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a vehicle-mounted non-contact line wear measurement system according to an embodiment of the present invention;
fig. 4 is a schematic distribution diagram of a vehicle-mounted non-contact line wear measurement system according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of an in-vehicle computing system of a vehicle-mounted non-contact wire wear measurement system according to an embodiment of the present invention;
fig. 6 is a schematic view of a vehicle roof monitoring system of a vehicle-mounted non-contact line wear measurement system according to an embodiment of the present invention.
Illustration of the drawings: 1-an ethernet network line; 2-an industrial personal computer; a 3-4G router; 4-an antenna; 5-contact line; 6-high-speed linear array camera; 7-line laser.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Referring to fig. 1, a method for measuring contact line wear in a vehicle-mounted non-contact manner includes:
s101, a contact line bottom contour curve picture is obtained.
In the embodiment, the contact line bottom profile curve is irradiated on a contact line through a line laser to form a contact line profile curve, and then is acquired by a high-definition area array camera additionally provided with a 808nm optical filter in front of a lens; the 808nm invisible light is selected, because the visible light in the nature can influence an imaging system, 808nm infrared light is used to avoid the influence factors, and the waveband infrared light has the advantages of high power, high electro-optic conversion efficiency, strong reliability, long service life, small volume and low cost, only the 808nm light is focused, and other environmental influence factors are effectively controlled.
S102, according to the position of the contact line bright spot in the contact line bottom contour curve picture, a pull-out value OffsetX of the contact line is obtained.
In this embodiment, first, a line laser irradiates on the contact line to form a short arc bright area; and then acquiring a contact line short arc bright area picture presented by shooting through a high-speed area-array camera. Calculating to obtain the pixel coordinate position of the short arc bright area by combining template matching; and finally, by means of a checkerboard calibration board, solving the matrix relation between the physical coordinate values and the pixel coordinate values, and completing the conversion between the pixel coordinates of the short arc bright area and the space physical coordinates.
S103, according to the contact line bottom contour curve picture and a gray scale map, solving a gray scale value which accounts for more than 80% of the distribution of the gray scale map, and solving an average gray scale value Ave as a background gray scale value;
s104, according to the pulling value OffsetX of the contact line, [ OffsetX-rangeX, OffsetX + rangeX ] is used for carrying out window range reduction operation on the contact line bottom contour curve picture.
In this embodiment, the range corresponds to the size of a view window required for accurately identifying the contact line profile; the purpose of RangeX is to focus the view window to a certain block area of the full picture.
S105, judging the left and right boundaries of the bottom surface contour of the contact line in the bottom contour curve picture of the contact line.
In this embodiment, one of the methods is: according to a background gray value Ave obtained by calculating the area-array camera picture, if gray values of continuous 5 pixels with central point pixel coordinates X1 are all kept at Ave, and 5 pixels with central point pixel coordinates X2 on the right side are all higher than Ave, the central pixel point X2 is the left boundary of the bottom surface contour of the contact line; if the gray values of the continuous 5 pixels with the central point pixel coordinate X1 are all maintained at Ave, and the continuous 5 pixels with the central point pixel coordinate X3 on the left side are all higher than Ave, the central pixel point X3 is the right boundary of the bottom surface contour of the contact line;
the second method is that if the gray value of the pixel point with the continuous 5 central point pixel coordinates X1 is higher than Ave, and the gray values of the continuous points with the right 5 central point pixel coordinates X2 are all higher than the gray value of X1, and the deviation is larger than delta A, the central pixel point X2 is the left boundary of the bottom surface contour of the contact line; if the gray value of the pixel points with the continuous 5 central point pixel coordinates of X1 is higher than Ave, the gray value of the continuous points with the left 5 central point pixel coordinates of X3 is higher than the gray value of X1, and the deviation is greater than delta A, the central pixel point X3 is the right boundary of the bottom surface contour of the contact line;
the brightness of the contact line abrasion area is high, the gray value is 255, the delta A is set to be 100-150, and the main purpose is to show that the abrasion area and the peripheral area have obvious gray value deviation.
S106, calculating the pixel number occupied by the contact line in the picture through the left and right boundaries of the bottom surface outline of the contact line;
and S107, calculating and storing the corresponding actual abrasion value according to the number of pixels.
Referring to fig. 2, a non-contact wear measuring device for a vehicle includes:
the acquisition unit 201 is used for acquiring a contact line bottom contour curve picture, wherein the contact line bottom contour curve is irradiated on a contact line through a line laser to form a contact line contour curve and then acquired by a high-definition area array camera additionally provided with a 808nm optical filter in front of a lens;
the first calculating unit 202 is configured to obtain a pull-out value OffsetX of the contact line according to a position of a contact line bright spot in a contact line bottom profile curve picture;
the second calculating unit 203 is configured to calculate a gray value occupying more than 80% of the distribution of the gray map according to the contact line bottom contour curve picture in combination with the gray map, and calculate an average gray value Ave as a background gray value;
a first processing unit 204, configured to perform a window narrowing operation on the contact line bottom profile curve picture by [ OffsetX-range, OffsetX + range ] according to the pull-out value OffsetX of the contact line;
the judging unit 205 is configured to judge left and right boundaries of the bottom surface profile of the contact line in the bottom profile curve picture of the contact line;
a third calculating unit 206, configured to calculate the number of pixels occupied by the contact line in the picture through the left and right boundaries of the bottom surface profile of the contact line;
and a second processing unit 207, configured to calculate and store the corresponding actual wear value by using the number of pixels.
Referring to fig. 3, a non-contact line wear measuring system for a vehicle includes a vehicle roof monitoring system 301 and a vehicle interior computing system 302;
the roof monitoring system 301 comprises a laser imaging module 3011 and an image acquisition module 3012; the laser imaging module 3011 comprises a high-power 808nm line laser generator mounted on the roof of the vehicle, and the line laser generator is perpendicular to the contact line; the image acquisition module 3012 comprises a high-speed line-scan camera assembled on the roof of the vehicle and matched with the line laser generator, and a camera lens with an optical filter;
the in-vehicle computing processing system 302 comprises an industrial personal computer module 3021 and a wireless transmission module 3022; the industrial personal computer module 3021 is a high-function industrial personal computer; the wireless transmission module 3022 is a 4G router and an antenna, and the high-function industrial personal computer is connected to the 4G router via an ethernet.
The roof monitoring system 301 is used for collecting and transmitting images; the in-vehicle computing and processing system is used for processing, analyzing and calculating the pictures acquired by the roof detection system, storing the values and uploading the values to the cloud;
the laser imaging module 3011 is used for laser irradiation to present a profile curve of the bottom surface of the contact line on the contact line;
the image acquisition module 3012 is configured to acquire a profile curve image of the line laser irradiated on the contact line, and a profile curve image of the line laser irradiated by the high-speed area-array camera on the rear side of the laser from the lateral rear side;
the industrial personal computer module 3021 is configured to obtain a contact line bottom profile curve picture, where the contact line bottom profile curve is obtained by a high-definition area array camera with an optical filter of 808nm attached in front of a lens after being irradiated on a contact line by a line laser to form a contact line profile curve; obtaining a pulling value OffsetX of the contact line according to the position of the contact line bright spot in the contact line bottom contour curve picture; combining a gray level image with a bottom contour curve image of the contact line, solving a gray level value which accounts for more than 80% of the distribution of the gray level image, and solving an average gray level value Ave as a background gray level value; according to the pulling value OffsetX of the contact line, carrying out window range reduction operation on the contact line bottom contour curve picture by [ OffsetX-range X, OffsetX + range X ]; judging left and right boundaries of the bottom surface contour of the contact line in the bottom contour curve picture of the contact line; calculating the pixel number occupied by the contact line in the picture through the left and right boundaries of the bottom surface outline of the contact line; calculating and storing the corresponding actual abrasion value through the pixel number;
the wireless transmission module 3022 is configured to upload data to the cloud via the router.
The working principle of the vehicle-mounted non-contact line abrasion measuring system provided by the invention is as follows: the train is electrified and started, the equipment is electrified and operated, and the roof monitoring system 301 starts to work; a line laser generator 7 of a laser imaging module 3011 of the car roof monitoring system 301 emits laser to form a contour line, a high-speed line camera 6 of an image acquisition module 3012 shoots a contour curve picture at the bottom of the contact line 5, and the shot picture is transmitted to the in-car computing processing system 302 through the Ethernet line 1; the in-vehicle high-function industrial personal computer 2 of the in-vehicle computing processing system 302 analyzes and processes the image; the image processing result is transmitted to the cloud database through the 4G router 3 of the wireless module 3022.
An embodiment of the present invention further provides a storage medium, and a storage medium, where a computer program is stored, and when the computer program is executed by a processor, the computer program implements part or all of the steps in each embodiment of the vehicle-mounted non-contact wire wear measurement method provided by the present invention. The storage medium may be a magnetic disk, an optical disk, a Read-only memory (ROM) or a Random Access Memory (RAM).
Those skilled in the art will readily appreciate that the techniques of the embodiments of the present invention may be implemented as software plus a required general purpose hardware platform. Based on such understanding, the technical solutions in the embodiments of the present invention may be essentially or partially implemented in the form of a software product, which may be stored in a storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments or some parts of the embodiments.
The same and similar parts in the various embodiments in this specification may be referred to each other. In particular, for an embodiment of the vehicle-mounted non-contact line wear measuring device, since the embodiment is basically similar to the method embodiment, the description is simple, and relevant points can be referred to the description in the method embodiment.
The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention.
Claims (7)
1. A vehicle-mounted non-contact line abrasion measuring method is characterized by comprising the following steps:
acquiring a contact line bottom contour curve picture, wherein the contact line bottom contour curve is irradiated on a contact line through a line laser to form a contact line contour curve and then is acquired by a high-definition area array camera with an 808nm optical filter additionally arranged in front of a lens;
obtaining a pulling value OffsetX of the contact line according to the position of the contact line bright spot in the contact line bottom contour curve picture;
combining a contact line bottom contour curve picture with a gray scale map, solving a gray scale value which accounts for more than 80% of the distribution of the gray scale map, and solving an average gray scale value Ave as a background gray scale value;
according to the pull-out value OffsetX of the contact line, carrying out window range reduction operation on the contact line bottom contour curve picture by using [ OffsetX-range X, OffsetX + range X ];
judging left and right boundaries of the bottom surface contour of the contact line in the bottom contour curve picture of the contact line;
calculating the pixel number occupied by the contact line in the picture through the left and right boundaries of the bottom surface outline of the contact line;
and calculating and storing the corresponding actual abrasion value through the pixel number.
2. The method for measuring the wear of the contact wire of the vehicle-mounted non-contact type according to claim 1, wherein a contact wire bottom contour curve picture is obtained, wherein 808nm invisible light is selected in the step of obtaining by a high-definition area array camera with an 808nm optical filter additionally arranged in front of a lens after the contact wire bottom contour curve is formed by irradiating the contact wire on a contact wire through a wire laser.
3. The method for measuring the wear of the contact wire in the non-contact vehicle-mounted manner according to claim 2, wherein obtaining the pull-out value OffsetX of the contact wire according to the position of the bright spot of the contact wire in the bottom profile curve picture of the contact wire comprises:
firstly, a line laser irradiates on a contact line to form a short arc bright area;
then, acquiring and shooting a contact line short arc bright area picture presented by a high-speed area-array camera, and calculating to obtain a pixel coordinate position of a short arc bright area by combining template matching;
and finally, by means of a checkerboard calibration board, solving the matrix relation between the physical coordinate values and the pixel coordinate values, and completing the conversion between the pixel coordinates of the short arc bright area and the space physical coordinates.
4. The on-vehicle non-contact line wear measurement method according to claim 1, wherein in the step of performing window-narrowing operation on the contact line bottom profile curve picture by [ offset-ranging x, offset + ranging x ] according to the pull-out value offset of the contact line, the range x corresponds to a size of a view angle window required for accurately identifying a contact line profile; RangeX is set to focus the view window to a certain area of the full picture.
5. The method for measuring contact line wear in a vehicle-mounted non-contact manner according to claim 1, wherein the step of judging the left and right boundaries of the contact line bottom surface profile in the contact line bottom profile curve picture comprises the following steps:
one method comprises the following steps: according to a background gray value Ave obtained by calculating the area-array camera picture, if gray values of continuous 5 pixels with central point pixel coordinates X1 are all kept at Ave, and 5 pixels with central point pixel coordinates X2 on the right side are all higher than Ave, the central pixel point X2 is the left boundary of the bottom surface contour of the contact line; if the gray values of the continuous 5 pixels with the central point pixel coordinate X1 are all maintained at Ave, and the continuous 5 pixels with the central point pixel coordinate X3 on the left side are all higher than Ave, the central pixel point X3 is the right boundary of the bottom surface contour of the contact line;
the second method is that if the gray value of the pixel point with the continuous 5 central point pixel coordinates X1 is higher than Ave, and the gray values of the continuous points with the right 5 central point pixel coordinates X2 are all higher than the gray value of X1, and the deviation is larger than delta A, the central pixel point X2 is the left boundary of the bottom surface contour of the contact line; if the gray value of the pixel points with the continuous 5 central point pixel coordinates of X1 is higher than Ave, the gray value of the continuous points with the left 5 central point pixel coordinates of X3 is higher than the gray value of X1, and the deviation is greater than delta A, the central pixel point X3 is the right boundary of the bottom surface contour of the contact line;
the brightness of a contact line abrasion area is high, the gray value is 255, and the delta A is set to be 100-150.
6. A vehicle-mounted non-contact wire abrasion measuring device is characterized by comprising:
the acquisition unit is used for acquiring a contact line bottom contour curve picture, wherein the contact line bottom contour curve is irradiated on a contact line through a line laser to form a contact line contour curve and then is acquired by a high-definition area array camera additionally provided with a 808nm optical filter in front of a lens;
the first calculation unit is used for obtaining a pull-out value OffsetX of the contact line according to the position of the contact line bright spot in the contact line bottom contour curve picture;
the second calculation unit is used for calculating a gray value which accounts for more than 80% of the distribution of the gray image according to the contact line bottom contour curve picture and the gray image, and calculating an average gray value Ave as a background gray value;
the first processing unit is used for carrying out window range reduction operation on the contact line bottom contour curve picture by [ OffsetX-range X, OffsetX + range X ] according to the pull-out value OffsetX of the contact line;
the judging unit is used for judging the left and right boundaries of the bottom surface outline of the contact line in the bottom outline curve picture of the contact line;
the third calculating unit is used for calculating the pixel number occupied by the contact line in the picture through the left and right boundaries of the bottom surface outline of the contact line;
and the second processing unit is used for calculating and storing the corresponding actual abrasion value through the number of pixels.
7. A vehicle-mounted non-contact line abrasion measuring system is characterized by comprising a vehicle roof monitoring system and an in-vehicle computing and processing system;
the roof monitoring system comprises a laser imaging module and an image acquisition module; the laser imaging module comprises a high-power 808nm line laser generator assembled on the roof of the vehicle, and the line laser generator is perpendicular to the contact line; the image acquisition module comprises a high-speed linear array camera which is assembled on the roof of the vehicle and matched with the linear laser generator, and a camera lens with an optical filter is matched with the high-speed linear array camera;
the in-vehicle computing processing system comprises an industrial personal computer module and a wireless transmission module; the industrial personal computer module is a high-function industrial personal computer; the wireless transmission module is a 4G router and an antenna, and the high-function industrial personal computer is connected with the 4G router through the Ethernet.
The roof monitoring system is used for collecting and transmitting images; the in-vehicle computing and processing system is used for processing, analyzing and calculating the pictures acquired by the roof detection system, storing the values and uploading the values to the cloud;
the laser imaging module is used for irradiating laser on the contact line to form a contour curve of the bottom surface of the contact line;
the image acquisition module is used for acquiring a contour curve image of line laser light irradiated on the contact line and shooting the contour curve image of the line laser light irradiated from the side rear part by a high-speed area array camera at the rear side of the laser;
the industrial personal computer module is used for acquiring a contact line bottom contour curve picture, wherein the contact line bottom contour curve is irradiated on a contact line through a line laser to form a contact line contour curve and then acquired by a high-definition area array camera additionally provided with a 808nm optical filter in front of a lens; obtaining a pulling value OffsetX of the contact line according to the position of the contact line bright spot in the contact line bottom contour curve picture; combining a gray level image with a bottom contour curve image of the contact line, solving a gray level value which accounts for more than 80% of the distribution of the gray level image, and solving an average gray level value Ave as a background gray level value; according to the pulling value OffsetX of the contact line, carrying out window range reduction operation on the contact line bottom contour curve picture by [ OffsetX-range X, OffsetX + range X ]; judging left and right boundaries of the bottom surface contour of the contact line in the bottom contour curve picture of the contact line; calculating the pixel number occupied by the contact line in the picture through the left and right boundaries of the bottom surface outline of the contact line; calculating and storing the corresponding actual abrasion value through the pixel number;
and the wireless transmission module is used for uploading data to a cloud terminal through the router.
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