CN115265386A - Carbon sliding plate abrasion detection method and related components - Google Patents
Carbon sliding plate abrasion detection method and related components Download PDFInfo
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- CN115265386A CN115265386A CN202210917124.0A CN202210917124A CN115265386A CN 115265386 A CN115265386 A CN 115265386A CN 202210917124 A CN202210917124 A CN 202210917124A CN 115265386 A CN115265386 A CN 115265386A
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- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
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Abstract
The invention discloses a carbon sliding plate abrasion detection method and related components, and relates to the technical field of motor train units.
Description
Technical Field
The invention relates to the technical field of motor trains, in particular to a carbon slide plate abrasion detection method and a related assembly.
Background
The pantograph is the electrical equipment that the EMUs acquireed the electric energy from the contact net, is provided with the carbon slide on the pantograph top, because carbon slide and contact net direct contact consequently need regularly measure the wearing and tearing degree in order to estimate the carbon slide to the carbon slide of renewal when carbon slide wearing and tearing degree is more serious guarantees that the EMUs can normally acquire the electric energy from the contact net. In the prior art, the thickness of the carbon sliding plate is usually measured manually and periodically, but the power of the whole contact net needs to be cut off before the thickness of the carbon sliding plate is measured manually, so that the normal operation of other motor train units can be influenced, and the problems of inconvenience in measurement, manpower consumption and inaccurate thickness measurement result of the carbon sliding plate exist in the prior art.
Disclosure of Invention
The invention aims to provide a carbon sliding plate abrasion detection method and related components, which are simple and accurate in measurement mode, and a contact network does not need to be powered off when the thickness of a carbon sliding plate and the abrasion degree of the carbon sliding plate are determined.
In order to solve the technical problem, the invention provides a carbon slide plate abrasion detection method, which comprises the following steps:
acquiring a pantograph image shot by a pantograph camera, and extracting a carbon sliding plate image from the pantograph image;
determining a pixel value between an upper edge of a carbon sled and a lower edge of the carbon sled in the carbon sled image;
determining the thickness of a carbon sliding plate according to the pixel value, wherein the thickness of the carbon sliding plate is in positive correlation with the pixel value and the distance between the pantograph camera and the carbon sliding plate, and the thickness of the carbon sliding plate is in negative correlation with the pixel value corresponding to the focal length of the pantograph camera;
and determining the abrasion degree of the carbon sliding plate according to the thickness of the carbon sliding plate.
Preferably, extracting a carbon sliding plate image in the pantograph image includes:
and extracting an image of a preset middle area of the carbon sliding plate from the pantograph image, and taking the image of the preset middle area as the carbon sliding plate image.
Preferably, after extracting an image of a preset middle area of the carbon sliding plate from the pantograph image, the method further includes:
judging whether an image of the preset middle area can be extracted from the pantograph image or not;
if so, taking the image of the preset middle area as the carbon sliding plate image;
and if not, generating information for prompting the carbon sliding plate image extraction failure.
Preferably, after determining the degree of wear of the carbon sliding plate according to the thickness of the carbon sliding plate, the method further comprises:
and outputting the abrasion degree of the carbon sliding plate and/or the thickness of the carbon sliding plate, and generating prompt information for prompting that the carbon sliding plate needs to be replaced after the abrasion degree of the carbon sliding plate is greater than a preset abrasion degree.
Preferably, determining a pixel value between an upper edge of a carbon slide and a lower edge of the carbon slide in the carbon slide image comprises:
extracting the carbon sled upper edge and the carbon sled lower edge in the carbon sled image;
performing curve fitting on the upper edge of the carbon sliding plate, and performing straight line fitting on the lower edge of the carbon sliding plate;
dividing an area formed by the upper edge of the carbon sliding plate after curve fitting and the lower edge of the carbon sliding plate after straight line fitting into N sub-areas, and respectively calculating pixel values between the upper edge of the carbon sliding plate and the lower edge of the carbon sliding plate in the N sub-areas, wherein N is a positive integer;
determining the thickness of the carbon sliding plate according to the pixel value and thickness conversion model, wherein the determining step comprises the following steps:
determining sub-thickness values of the N sub-regions according to pixel values of the N sub-regions and the pixel values and a thickness conversion model respectively;
taking the smallest sub-thickness value as the thickness of the carbon sliding plate.
Preferably, determining the thickness of the carbon slide plate from the pixel values comprises:
substituting the pixel value into a pixel value and thickness conversion model to obtain the thickness of the carbon sliding plate, wherein the pixel value and thickness conversion model is as follows:
wherein M is a thickness of the carbon sled, Z is the pixel value, D is a distance between the pantograph camera and the carbon sled, α y And the pixel value is the pixel value corresponding to the focal length of the pantograph camera.
In order to solve the above technical problem, the present invention further provides a carbon slide wear detection system, including:
an image extraction unit for acquiring a pantograph image captured by a pantograph camera and extracting a carbon slide plate image from the pantograph image;
a pixel value determination unit for determining a pixel value between an upper edge of the carbon slide and a lower edge of the carbon slide in the carbon slide image;
a thickness determination unit configured to determine a thickness of a carbon slider from the pixel value, wherein the thickness of the carbon slider is in positive correlation with the pixel value and a distance between the pantograph camera and the carbon slider, and the thickness of the carbon slider has a pixel value corresponding to a focal length of the pantograph camera;
and determining the abrasion degree of the carbon sliding plate according to the thickness of the carbon sliding plate.
In order to solve the above technical problem, the present invention further provides a carbon slide wear detection apparatus, including:
a memory for storing a computer program;
and the processor is used for realizing the steps of the carbon sliding plate abrasion detection method when executing the computer program.
In order to solve the technical problem, the invention further provides a bullet train which comprises the carbon slide plate abrasion detection device.
The present invention also provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the computer program implements the steps of the carbon sliding plate wear detection method.
In summary, the invention provides a carbon sliding plate abrasion detection method and related components, which includes the steps of firstly obtaining a pantograph image shot by a pantograph camera, then extracting a carbon sliding plate image from the pantograph image, determining a pixel value between an upper edge of the carbon sliding plate and a lower edge of the carbon sliding plate in the carbon sliding plate image, determining the thickness of the carbon sliding plate based on the pixel value between the upper edge of the carbon sliding plate and the lower edge of the carbon sliding plate, finally determining the abrasion degree of the carbon sliding plate according to the thickness of the carbon sliding plate so as to detect whether the carbon sliding plate needs to be replaced, and in the process of abrasion detection of the carbon sliding plate, a contact net does not need to be powered off, so that the measurement is convenient and accurate.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required in the prior art and 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 flow chart of a carbon slide wear detection method according to the present invention;
FIG. 2 is a schematic diagram of pixel values of an edge of a carbon slide in a carbon slide wear detection method according to the present invention;
FIG. 3 is a schematic structural diagram of a carbon slide wear detection system according to the present invention;
FIG. 4 is a schematic structural view of a carbon slide wear detection system according to the present invention;
fig. 5 is a system architecture diagram of a motor car provided by the invention.
Detailed Description
The core of the invention is to provide the carbon sliding plate abrasion detection method and the related components, when the thickness of the carbon sliding plate and the abrasion degree of the carbon sliding plate are determined, a contact net does not need to be powered off, and the measurement mode is simple and accurate.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present 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.
Referring to fig. 1, fig. 1 is a flowchart of a carbon sliding plate wear detection method according to the present invention, the carbon sliding plate wear detection method includes:
s1: acquiring a pantograph image shot by a pantograph camera, and extracting a carbon sliding plate image from the pantograph image;
the carbon slide plate is subjected to abrasion degree detection in the prior art, generally, after a contact net is powered off, the thickness of the carbon slide plate is manually measured, then the abrasion degree of the carbon slide plate is determined based on the thickness of the carbon slide plate, and the carbon slide plate is replaced by a new carbon slide plate when the abrasion degree of the carbon slide plate is serious. But there is the problem that need to cut off the power supply of contact net and measure inaccurately in the prior art.
In order to solve the technical problem, the application provides a carbon sliding plate abrasion detection method, and an execution main body of the carbon sliding plate abrasion detection method provided by the application can be a processor or an intelligent analysis host in a motor train unit, and the application is not particularly limited thereto.
Because the carbon slide is located the pantograph, consequently this application acquires the pantograph image that the pantograph camera was shot at first, and the pantograph camera can be in real time or shoot the pantograph image when being triggered, does not receive the restriction whether electrified of contact net, consequently need not cut off the power supply of contact net when confirming the thickness of carbon slide and the wearing and tearing degree of carbon slide. After the pantograph image shot by the pantograph camera is acquired, the carbon sliding plate image is extracted from the pantograph image so as to determine the size of the carbon sliding plate in the two-dimensional image based on the carbon sliding plate image, and then the real thickness of the carbon sliding plate is determined based on the size of the carbon sliding plate in the two-dimensional image. The present application is not particularly limited as to how to extract the carbon sliding plate image in the pantograph image.
In the present application, the pantograph image captured by the pantograph camera may be acquired under a trigger condition set in advance, for example, the trigger condition may be pantograph lowering or motor train unit stopping, and the present application is not particularly limited thereto.
In the present application, a pantograph camera is mounted in advance near the pantograph to capture an image or video of the pantograph, and the distance between the pantograph camera and the carbon slide plate are kept constant.
S2: determining a pixel value between an upper edge of the carbon slide and a lower edge of the carbon slide in the carbon slide image;
in order to determine the real thickness of the carbon sliding plate, the pixel size of the carbon sliding plate in a two-dimensional image needs to be determined based on the carbon sliding plate image, specifically, in the application, the upper edge and the lower edge of the carbon sliding plate are determined first, and then the pixel value between the upper edge and the lower edge of the carbon sliding plate is determined. Referring to fig. 2, fig. 2 is a schematic diagram illustrating pixel values of an edge of a carbon sliding plate in a carbon sliding plate wear detection method according to the present invention.
It should be noted that the upper edge of the carbon slide plate corresponds to the lower edge of the carbon slide plate one by one. The present application is not particularly limited as to how the pixel values between the upper edge of the carbon sled and the lower edge of the carbon sled are specifically determined.
S3: determining the thickness of the carbon sliding plate according to the pixel value, wherein the thickness of the carbon sliding plate is in positive correlation with the pixel value and the distance between the pantograph camera and the carbon sliding plate, and the thickness of the carbon sliding plate is in negative correlation with the pixel value corresponding to the focal length of the pantograph camera;
after determining the pixel value between the upper edge of the carbon sled and the lower edge of the carbon sled, the thickness of the carbon sled can be determined based on the pixel value between the upper edge of the carbon sled and the lower edge of the carbon sled. Specifically, the thickness of the carbon slide plate in the three-dimensional world coordinate system is converted into the two-dimensional coordinate system of the video image, and then the converted thickness is the pixel value between the upper edge of the carbon slide plate and the lower edge of the carbon slide plate, so that the thickness of the carbon slide plate is positively correlated with the pixel value between the upper edge of the carbon slide plate and the lower edge of the carbon slide plate.
In addition, the pixel value of the thickness of the carbon slide plate in the two-dimensional coordinate system of the video image is also related to the distance between the pantograph camera and the carbon slide plate, and when the thickness of the carbon slide plate is consistent, the farther the distance between the pantograph camera and the carbon slide plate is, the smaller the pixel value between the upper edge of the carbon slide plate and the lower edge of the carbon slide plate is, so that the thickness of the carbon slide plate and the distance between the pantograph and the carbon slide plate are positively related in the present application.
Further, it is also determined in the present application that the thickness of the carbon slide plate is inversely related to the value of the focal length of the pantograph camera in pixels. The real distance of the three-dimensional world corresponding to each pixel in the video image is determined, and the value of the focal length of the pantograph camera expressed by the pixels in the application is the quotient of the focal length of the pantograph camera divided by the real distance expressed by each pixel in the video image shot by the pantograph camera.
S4: and determining the abrasion degree of the carbon sliding plate according to the thickness of the carbon sliding plate.
After the thickness of the carbon sliding plate is determined based on the pixel value between the upper edge of the carbon sliding plate and the lower edge of the carbon sliding plate, the abrasion degree of the carbon sliding plate can be determined according to the thickness of the carbon sliding plate, and then whether a new carbon sliding plate needs to be replaced or not is determined, so that the normal operation of the motor train is ensured.
The present application is not particularly limited as to how to determine the degree of wear of the carbon sliding plate in terms of the thickness of the carbon sliding plate. For example, when the thickness of the carbon sliding plate is smaller than a preset thickness threshold value, the abrasion degree of the carbon sliding plate is determined to be severe abrasion, and at the moment, a new carbon sliding plate needs to be replaced for a bullet train, so that the method is suitable for an application scene with higher requirement on the thickness of the carbon sliding plate; or, when the thickness of the carbon sliding plate is not within the preset thickness range, the abrasion degree of the carbon sliding plate is judged to be heavy abrasion, and at the moment, a new carbon sliding plate needs to be replaced for the bullet train, so that the method is suitable for application scenes with lower requirements on the thickness of the carbon sliding plate.
In summary, the invention provides a carbon sliding plate abrasion detection method, which includes the steps of firstly obtaining a pantograph image shot by a pantograph camera, then extracting a carbon sliding plate image from the pantograph image, determining a pixel value between an upper edge of the carbon sliding plate and a lower edge of the carbon sliding plate in the carbon sliding plate image, determining the thickness of the carbon sliding plate based on the pixel value between the upper edge of the carbon sliding plate and the lower edge of the carbon sliding plate, finally determining the abrasion degree of the carbon sliding plate according to the thickness of the carbon sliding plate so as to detect whether the carbon sliding plate needs to be replaced, and avoiding power failure of a contact network in the abrasion detection process of the carbon sliding plate, so that the measurement is convenient and accurate.
On the basis of the above-described embodiment:
as a preferred embodiment, extracting a carbon sliding plate image in a pantograph image includes:
and extracting an image of a preset middle area of the carbon sliding plate from the pantograph image, and taking the image of the preset middle area as the carbon sliding plate image.
Considering that the area of the motor train unit which is worn away in the process of obtaining electricity from the overhead contact system through the carbon sliding plate is mainly the middle area of the carbon sliding plate, in order to reduce the calculation amount for calculating the thickness of the carbon sliding plate, the preset middle area is preset in the embodiment, and the wear degree of the carbon sliding plate is mainly determined based on the thickness of the preset middle area of the carbon sliding plate.
Specifically, in the present embodiment, only the image of the preset middle area of the carbon sliding plate is extracted from the pantograph image, and the image of the preset middle area is used as the carbon sliding plate image, so that when the pixel value between the upper edge of the carbon sliding plate and the lower edge of the carbon sliding plate is determined, only the pixel value between the upper edge of the carbon sliding plate and the lower edge of the carbon sliding plate in the preset middle area is calculated, thereby reducing the calculation amount for calculating the pixel value and the thickness of the carbon sliding plate, and improving the efficiency for determining the wear degree of the carbon sliding plate.
As a preferred embodiment, when extracting an image of a preset middle area of the carbon sliding plate from the pantograph image, the method further includes:
judging whether an image of a preset middle area can be extracted from the pantograph image or not;
if so, taking the image of the preset middle area as the carbon sliding plate image;
and if not, generating information for prompting the failure of the carbon sliding plate image extraction.
Considering that unexpected situations such as carbon sliding plate fracture may occur in the actual running process of the motor train unit, in this embodiment, while an image of a preset middle area of the carbon sliding plate is extracted from a pantograph image, it is also determined whether the image of the preset middle area of the carbon sliding plate can be successfully extracted from the pantograph image, if the image can be normally extracted, it is proved that the carbon sliding plate has no unexpected situations such as fracture, and the step of taking the image of the preset middle area as the carbon sliding plate image may be performed; if the image of the preset middle area cannot be extracted from the pantograph image, it is proved that the carbon sliding plate is not in the shooting range of the pantograph camera due to the fact that the carbon sliding plate is likely to break and other accidents, and therefore prompt information for prompting that the carbon sliding plate image is failed to be extracted is further generated in the embodiment, and operation and maintenance personnel can brake the motor train unit or perform other processing after seeing the prompt information.
In addition, the specific value of the preset middle area is not particularly limited in this embodiment, and can be set according to the actual situation.
In conclusion, the embodiment determines whether the carbon sliding plate is broken or damaged due to an unexpected situation by judging whether the carbon sliding plate can be extracted from the pantograph image to the image of the preset middle area, so that the normal operation of the motor train unit is ensured.
As a preferred embodiment, after determining the degree of wear of the carbon sliding plate according to the thickness of the carbon sliding plate, the method further comprises:
and outputting the abrasion degree of the carbon sliding plate and/or the thickness of the carbon sliding plate, and generating prompt information for prompting that the carbon sliding plate needs to be replaced after the abrasion degree of the carbon sliding plate is greater than the preset abrasion degree.
After determining the wear degree of the carbon sliding plate according to the thickness of the carbon sliding plate, in order to facilitate the operation and maintenance personnel to know the relevant situation of the carbon sliding plate in time, in this embodiment, the wear degree of the carbon sliding plate and/or the thickness of the carbon sliding plate are also output.
In order to further ensure the safety of the bullet train in operation, in this embodiment, prompt information is generated when the wear degree of the carbon slide plate is greater than the preset wear degree, so as to prompt the operation and maintenance personnel to replace the new carbon slide plate in time. The prompt message may also be generated when the thickness of the carbon sliding plate is smaller than a preset thickness threshold, which is not particularly limited in the present application.
As a preferred embodiment, determining pixel values between an upper edge of a carbon slide and a lower edge of the carbon slide in an image of the carbon slide comprises:
extracting the upper edge and the lower edge of the carbon sliding plate from the image of the carbon sliding plate;
performing curve fitting on the upper edge of the carbon sliding plate, and performing straight line fitting on the lower edge of the carbon sliding plate;
dividing an area formed by the upper edge of the carbon sliding plate after curve fitting and the lower edge of the carbon sliding plate after straight line fitting into N sub-areas, and respectively calculating pixel values between the upper edge of the carbon sliding plate and the lower edge of the carbon sliding plate in the N sub-areas, wherein N is a positive integer;
determining the thickness of the carbon sliding plate according to the pixel value and thickness conversion model, wherein the method comprises the following steps:
determining sub-thickness values of the N sub-regions according to the pixel values of the N sub-regions and the pixel value and thickness conversion model respectively;
the smallest sub-thickness value is taken as the thickness of the carbon slide.
In this embodiment, in order to determine the pixel value between the upper edge and the lower edge of the carbon slider, the upper edge and the lower edge of the carbon slider are first extracted from the image of the carbon slider, and the upper edge of the carbon slider is curve-fitted and the lower edge of the carbon slider is straight-line-fitted in combination with the shape characteristics of the carbon slider in practical use. The application is not particularly limited as to how the carbon sled upper edge and the carbon sled lower edge are specifically fitted. In order to facilitate determination of the pixel value between the upper edge of the carbon slider and the lower edge of the carbon slider, the area between the upper edge of the carbon slider and the lower edge of the carbon slider is divided into N sub-areas in the present embodiment, and the pixel value between the upper edge of the carbon slider and the lower edge of the carbon slider in each sub-area is calculated, for example, the pixel value between the middle point of the upper edge of the carbon slider and the middle point of the lower edge of the carbon slider in each sub-area is calculated. And, the more the number of sub-regions, the more accurate the pixel value between the upper edge of the carbon sliding plate and the lower edge of the carbon sliding plate, so the setting of the number of sub-regions can be selected according to the actual application scenario.
After the pixel values between the upper edge and the lower edge of the carbon sliding plate in the N sub-regions are determined, the sub-thicknesses of the carbon sliding plate in the N sub-regions can be determined according to the predetermined pixel values and the thickness conversion model, and considering whether the carbon sliding plate needs to be replaced with a new one mainly depends on whether the region with the thinnest thickness of the carbon sliding plate can meet the requirement, the minimum sub-thickness value is taken as the thickness of the carbon sliding plate in the embodiment, and the abrasion degree of the carbon sliding plate is determined based on the minimum sub-thickness value.
It should be noted that, in this embodiment, the minimum sub-pixel value (the pixel value between the upper edge of the carbon slider and the lower edge of the carbon slider in the sub-region) in the N sub-regions may be determined first, then the sub-thickness value corresponding to the minimum sub-pixel value is obtained according to the pixel value and the thickness conversion model, and the wear degree of the carbon slider is determined based on the sub-thickness value.
In conclusion, in the embodiment, the mode of determining the pixel value between the upper edge and the lower edge of the carbon sliding plate in the carbon sliding plate image simplifies the calculation mode on the basis of ensuring the accuracy of the calculation result of the pixel value, and further improves the efficiency of determining the abrasion degree of the carbon sliding plate.
As a preferred embodiment, determining the thickness of the carbon slide from the pixel values comprises:
substituting the pixel value into a pixel value and thickness conversion model to obtain the thickness of the carbon sliding plate, wherein the pixel value and thickness conversion model is as follows:
wherein M is the thickness of the carbon slide plate, Z is the pixel value, D is the distance between the pantograph camera and the carbon slide plate, and alpha y The pixel value corresponding to the focal length of the pantograph camera.
In the embodiment, the pixel value and thickness conversion model is provided as
Wherein the pixel value between the upper edge of the carbon slider and the lower edge of the carbon sliderReference may be made to the above-described embodiments of the carbon slide wear detection method. The distance between the pantograph camera and the carbon sliding plate can be measured when the pantograph camera is installed in advance, and the distance between the pantograph camera and the carbon sliding plate needs to be guaranteed to be unchanged in the process of detecting abrasion of the carbon sliding plate.
The value of the focal length of the pantograph camera expressed by pixels can be obtained by calculating an internal reference matrix of the pantograph camera, specifically, the pantograph camera is calibrated by using a checkerboard, and if a coordinate system corresponding to the pantograph camera coincides with a three-dimensional world coordinate system, a relationship between a certain point on the three-dimensional world coordinate system and a pixel coordinate of the point on a pantograph image shot by the pantograph camera can be expressed as follows:
wherein (X) W ，Y W ,Z W ) Is the coordinate of the point in the three-dimensional world coordinate system, (u, v) is the pixel coordinate of the point, Z c ＝Z W Is the distance, P, of the point to the plane of the pantograph camera 3×4 Is a projection matrix. Since the three-dimensional world coordinate system coincides with the coordinate system corresponding to the pantograph camera, Z c ＝Z W . Projection matrix P computed using singular value decomposition 3×4 Then, the RQ decomposition is carried out to convert the RQ into an internal reference matrix
K：
Wherein alpha is x Representing the focal length of the pantograph camera by the value, alpha, represented by a pixel in the X-direction in the pantograph image y Representing the focal length of a pantograph camera by the value, p, of the pixel representation in the Y direction in the pantograph image x And p y The main point is s is a skew parameter.
Each pixel in the pantograph image corresponds to a certain real distanceIn the present application, the pixel value corresponding to the focal length of the pantograph camera is the quotient of the focal length of the pantograph divided by the real distance corresponding to each pixel in the pantograph image, and the thickness of the carbon slider is only related to the pixel in the Y direction of the pantograph image, so that the thickness of the carbon slider is not related to the pixel in the Y direction of the pantograph image
In summary, the pixel value and thickness conversion model is determined as
The thickness of the carbon sliding plate can be calculated more accurately and simply.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a carbon slide abrasion detecting system provided in the present invention, the carbon slide abrasion detecting system includes:
an image extraction unit 11 configured to acquire a pantograph image captured by a pantograph camera and extract a carbon slider image from the pantograph image;
a pixel value determining unit 12 for determining a pixel value between an upper edge of the carbon slide and a lower edge of the carbon slide in the carbon slide image;
a thickness determination unit 13, configured to determine a thickness of the carbon slider according to the pixel value and the pixel value-thickness conversion model, where the thickness and the pixel value of the carbon slider, and a distance between the pantograph camera and the carbon slider are in positive correlation, and the thickness of the carbon slider and a value represented by the pixel of the pantograph camera are in negative correlation;
and a wear degree determination unit 14 for determining a wear degree of the carbon sliding plate based on a thickness of the carbon sliding plate.
For a related introduction of the carbon sliding plate wear detection system provided by the present invention, please refer to the above embodiment of the carbon sliding plate wear detection method, which is not described herein again.
On the basis of the above-described embodiment:
as a preferred embodiment, the image extraction unit 11 is specifically configured to acquire a pantograph image captured by a pantograph camera, extract an image of a preset intermediate region of the carbon slider in the pantograph image, and take the image of the preset intermediate region as the carbon slider image.
As a preferred embodiment, the method further comprises the following steps:
a determination unit configured to determine whether an image of a preset intermediate region of the carbon sliding plate can be extracted in the pantograph image when the image of the preset intermediate region is extracted in the pantograph image; if yes, triggering the image extraction unit 11; if not, triggering a first prompting unit;
and the prompting unit is used for generating information for prompting the carbon sliding plate image extraction failure.
As a preferred embodiment, further comprising:
and the second prompting unit is used for outputting the abrasion degree of the carbon sliding plate and/or the thickness of the carbon sliding plate after determining the abrasion degree of the carbon sliding plate according to the thickness of the carbon sliding plate, and generating prompting information for prompting that the carbon sliding plate needs to be replaced after the abrasion degree of the carbon sliding plate is greater than the preset abrasion degree.
As a preferred embodiment, the pixel value determining unit 12 includes:
an edge extraction unit for extracting an upper edge and a lower edge of the carbon slider from the carbon slider image;
the edge fitting unit is used for performing curve fitting on the upper edge of the carbon sliding plate and performing straight line fitting on the lower edge of the carbon sliding plate;
an area pixel value determining unit 12, configured to divide an area formed by the upper edge of the carbon sliding plate after curve fitting and the lower edge of the carbon sliding plate after straight line fitting into N sub-areas, and calculate pixel values between the upper edge of the carbon sliding plate and the lower edge of the carbon sliding plate in the N sub-areas respectively;
the thickness determining unit 13 is specifically configured to determine sub-thickness values of the N sub-regions according to the pixel values of the N sub-regions, the pixel values, and the thickness conversion model, and use the minimum sub-thickness value as the thickness of the carbon sliding plate.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a carbon sliding plate wear detection apparatus provided in the present invention, the carbon sliding plate wear detection apparatus includes:
a memory 21 for storing a computer program;
and a processor 22 for implementing the steps of the carbon sliding plate abrasion detection method when executing the computer program.
For the related introduction of the carbon sliding plate wear detection system provided by the present invention, please refer to the above embodiment of the carbon sliding plate wear detection method, which is not described herein again.
The invention also provides a bullet train which comprises the carbon slide plate abrasion detection device.
For the description of the bullet train provided by the present invention, please refer to the above embodiment of the carbon slide wear detection method, which is not described herein again.
Referring to fig. 5, fig. 5 is a system architecture diagram of a bullet train according to the present invention, the bullet train includes a pantograph camera for capturing a pantograph image, a pantograph video monitoring server for transmitting the pantograph image, a car controller for networking, and an intelligent analysis host corresponding to the processor 22.
The invention also provides a computer readable storage medium, wherein a computer program is stored on the computer readable storage medium, and the computer program is executed by a processor to realize the steps of the carbon sliding plate abrasion detection method.
For the related description of the computer-readable storage medium provided by the present invention, please refer to the above-mentioned embodiment of the carbon sled wear detection method, which is not described herein again.
In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A carbon slide wear detection method is characterized by comprising the following steps:
acquiring a pantograph image shot by a pantograph camera, and extracting a carbon sliding plate image from the pantograph image;
determining a pixel value between an upper edge of a carbon sled and a lower edge of the carbon sled in the carbon sled image;
determining the thickness of a carbon sliding plate according to the pixel value, wherein the thickness of the carbon sliding plate is in positive correlation with the pixel value and the distance between the pantograph camera and the carbon sliding plate, and the thickness of the carbon sliding plate is in negative correlation with the pixel value corresponding to the focal length of the pantograph camera;
and determining the abrasion degree of the carbon sliding plate according to the thickness of the carbon sliding plate.
2. The carbon slide wear detection method according to claim 1, wherein extracting a carbon slide image in the pantograph image comprises:
and extracting an image of a preset middle area of the carbon sliding plate from the pantograph image, and taking the image of the preset middle area as the carbon sliding plate image.
3. The carbon sliding plate wear detection method according to claim 2, wherein, when extracting the image of the preset intermediate area of the carbon sliding plate in the pantograph image, the method further comprises:
judging whether an image of the preset middle area can be extracted from the pantograph image or not;
if so, taking the image of the preset middle area as the carbon sliding plate image;
and if not, generating information for prompting the carbon sliding plate image extraction failure.
4. The carbon skid wear detection method of claim 1, further comprising, after determining the degree of wear of the carbon skid based on the thickness of the carbon skid,:
and outputting the abrasion degree of the carbon sliding plate and/or the thickness of the carbon sliding plate, and generating prompt information for prompting that the carbon sliding plate needs to be replaced after the abrasion degree of the carbon sliding plate is greater than a preset abrasion degree.
5. The carbon sled wear detection method of claim 1, wherein determining pixel values between a carbon sled upper edge and a carbon sled lower edge in the carbon sled image comprises:
extracting the upper edge of the carbon slide and the lower edge of the carbon slide in the carbon slide image;
performing curve fitting on the upper edge of the carbon sliding plate, and performing straight line fitting on the lower edge of the carbon sliding plate;
dividing an area formed by the upper edge of the carbon sliding plate after curve fitting and the lower edge of the carbon sliding plate after straight line fitting into N sub-areas, and respectively calculating pixel values between the upper edge of the carbon sliding plate and the lower edge of the carbon sliding plate in the N sub-areas, wherein N is a positive integer;
determining the thickness of the carbon sliding plate according to the pixel value and thickness conversion model, and the method comprises the following steps:
determining sub-thickness values of the N sub-regions according to pixel values of the N sub-regions and the pixel values and a thickness conversion model respectively;
taking the smallest sub-thickness value as the thickness of the carbon sliding plate.
6. The carbon sled wear detection method of any of claims 1-5, wherein determining a thickness of the carbon sled from the pixel values comprises:
substituting the pixel value into a pixel value and thickness conversion moduleAnd obtaining the thickness of the carbon sliding plate, wherein the pixel value and thickness conversion model is as follows:
wherein M is a thickness of the carbon sled, Z is the pixel value, D is a distance between the pantograph camera and the carbon sled, α y And the pixel value is the pixel value corresponding to the focal length of the pantograph camera.
7. A carbon slide wear detection system, comprising:
an image extraction unit for acquiring a pantograph image captured by a pantograph camera and extracting a carbon slide plate image from the pantograph image;
a pixel value determination unit for determining a pixel value between an upper edge of a carbon slide and a lower edge of the carbon slide in the carbon slide image;
a thickness determination unit configured to determine a thickness of a carbon slider from the pixel value, wherein the thickness of the carbon slider is in positive correlation with the pixel value and a distance between the pantograph camera and the carbon slider, and the thickness of the carbon slider has a pixel value corresponding to a focal length of the pantograph camera;
and determining the abrasion degree of the carbon sliding plate according to the thickness of the carbon sliding plate.
8. A carbon slide abrasion detection device, comprising:
a memory for storing a computer program;
a processor for implementing the steps of the carbon sled wear detection method of any one of claims 1-6 when executing the computer program.
9. A bullet train comprising the carbon sled wear detection apparatus of claim 8.
10. A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when executed by a processor, the computer program implements the steps of the carbon sled wear detection method as recited in any one of claims 1 to 6.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115810010A (en) * | 2023-01-17 | 2023-03-17 | 广州运达智能科技有限公司 | Train pantograph online detection method and system |
| CN117333526A (en) * | 2023-09-06 | 2024-01-02 | 重庆中车四方所智能装备技术有限公司 | Method for measuring thickness of copper-based slider of pantograph of monorail car, storage medium and system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115810010A (en) * | 2023-01-17 | 2023-03-17 | 广州运达智能科技有限公司 | Train pantograph online detection method and system |
| CN117333526A (en) * | 2023-09-06 | 2024-01-02 | 重庆中车四方所智能装备技术有限公司 | Method for measuring thickness of copper-based slider of pantograph of monorail car, storage medium and system |
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