Method for measuring abrasion of contact line of rigid contact net

Abstract

According to the rigid contact net contact line abrasion measuring method, the contact net contact line is detected in real time, the abrasion area of the contact line is synchronously calculated, the calculation efficiency is high, and remote checking can be achieved. The invention provides a rigid contact net contact line abrasion measuring method which comprises the following steps: S1, arranging a measuring device and setting measuring parameters, and scanning and acquiring a rigid contact net contact line contour; s2, analyzing the obtained contour of the contact line of the rigid contact network to obtain a contour of an unworn surface of the contact line and a contour of a worn surface of the contact line; s3, fitting the contour of the unworn surface of the contact line obtained in the step S2 to obtain a theoretical contour A [semicircle] B of the contact line, determining two end points C and D of the worn surface, and fitting to obtain a distance LCD between the two end points C and D of the worn surface; s4, calculating the length LOE of the distance between the circle center O of the arc and the LCD; s5, calculating the residual height L of the contact line; and S6, calculating the actual abrasion area S of the contact line of the rigid contact net.

Description

Technical Field

[0001] The invention relates to the field of contact network detection, and in particular to a method for measuring the wear of a rigid contact network contact line. Background Art

[0002] The contact network is an important power supply equipment in urban rail transit, and its operating status is directly related to the safety and stability of the entire system. Since the contact network obtains traction power through uninterrupted contact between the contact wire and the pantograph, long-term contact may cause excessive wear of the contact wire, thereby affecting the current collection quality of the locomotive. At the same time, since the line is a single line, once there is a problem with the rigid contact network suspension at a certain point, it will cause line abnormalities, which may cause power outages at the least or various underground disasters at the worst. Therefore, it is very important to detect the wear of the contact network to ensure the safe operation of the train.

[0003] The current detection method is mainly to measure and collect static data such as contact network height, contact network rise value, contact network tortuosity value, etc. by maintenance personnel carrying special detection equipment when the line is shut down. This detection can ensure the technical parameter requirements of the contact network in the early stage of locomotive operation and eliminate accident risks from the source. It is a routine task in daily operation and maintenance work and an effective means to reduce the probability of accidents. However, the main disadvantages of manual detection of rigid contact network wear include:

[0004] Low detection efficiency: Manual detection requires a lot of time and manpower, and each contact network needs to be inspected one by one, resulting in low detection efficiency.

[0005] Low detection accuracy: Manual detection is easily affected by factors such as vision and experience, which leads to errors in the detection results and makes it difficult to ensure detection accuracy.

[0006] There are safety hazards: Manual inspection requires direct contact with the contact network, which is prone to safety accidents such as electric shock, posing a threat to the safety of inspectors.

[0007] Unable to monitor in real time: Manual inspection can only be performed on the contact network offline. It is impossible to monitor the operating status of the contact network in real time, making it difficult to detect and deal with problems in a timely manner. Summary of the invention

[0008] In order to solve the above problems, the present invention provides a method for measuring the wear of the contact line of a rigid contact network, which performs real-time detection on the contact line of the contact network and synchronously calculates the wear area of ​​the contact line, has high calculation efficiency and can be viewed remotely.

[0009] The present invention provides a method for measuring the wear of a rigid contact wire, comprising the following steps:

[0010] Step S1, arranging the measuring device and setting the measuring parameters, scanning and acquiring the contact line profile of the rigid contact network;

[0011] Step S2, analyzing the obtained contact line profile of the rigid contact network to obtain the contact line unworn surface profile and the contact line worn surface profile;

[0012] Step S3, fitting the unworn surface profile of the contact line obtained in step S2 to obtain the theoretical profile of the contact line A⌒B, and determining the center O of the fitting arc and the diameter length d of the fitting arc according to the curvature of the fitting arc, determining the two end points C and D of the worn surface according to the worn surface profile of the contact line obtained in step S2, and obtaining the distance L between the two end points C and D of the worn surface by fitting. CD ; In this embodiment, the unworn surface profile of the contact line obtained in the fitting step S2 is to fit the contact line profile data into an arc;

[0013] Step S4: according to the distance L between the two end points C and D of the wear surface obtained in step S3, CD , fit the arc diameter length d, calculate the arc center O to L CD The distance between OE ;

[0014] Step S5, through L 0E And the diameter length d of the fitting arc, calculate the remaining height L of the contact line;

[0015] Step S6, by fitting the diameter length d of the arc, the remaining height L of the contact line, and the distance L between the two end points C and D of the wear surface CD Calculate the wear area S of the actual rigid contact line.

[0016] In one embodiment, in step S4, the distance length LOE between the arc center O and LCD is obtained by a first formula, wherein the first formula is: L OE =1 / 2*d*COS(sin-1(L CD )).

[0017] In one embodiment, in step S5, the remaining height L of the contact line is obtained by a second formula, wherein the second formula is: L = 1 / 2*d + L OE .

[0018] In one embodiment, in step S6, the actual wear area S of the rigid contact wire is equal to the area S of the theoretical sector OCD. 扇OCD - Area S of triangle OCD △OCD .

[0019] In one embodiment, the area S of the theoretical sector OCD is 扇OCD The calculation formula is as follows: 扇 =1 / 4*d 2 *sin-1 (L CD / d);

[0020] The area S of the triangle OCD △OCD The calculation formula is as follows: △ =1 / 4*L CD *√(d 2 -L 2 ).

[0021] In one embodiment, the measuring device in step S1 includes: a detector and an industrial control integrated machine connected to each other, the detector includes a walking trolley, the walking trolley is suspended on the bus and can walk along the bus, an aviation plug, a travel switch assembly, a linear laser sensor, an infrared camera, a reflective photoelectric, a stepper motor and a stepper motor controller are installed in the walking trolley, the stepper motor controller controls the forward and reverse movement of the stepper motor to drive the trolley forward and backward, the travel switch assembly signal is disconnected to control the trolley to stop moving, the linear laser sensor scans the contour of the contact line, the infrared camera records in real time, and the reflective photoelectric detects the interface of the bus, and the industrial control integrated machine is provided with a power module, and the power module is used to power the stepper motor, the travel switch assembly, the linear laser sensor, the infrared camera, the reflective photoelectric, the industrial control integrated machine, and the stepper motor controller through the aviation plug;

[0022] The arrangement of the measuring device comprises: hanging the detector on the bus bar and turning it on;

[0023] Among them, the industrial control all-in-one computer is connected with the linear laser sensor, infrared camera, and reflective photoelectric through IP matching.

[0024] In one embodiment, the measurement parameters are set to set the interface configuration parameters of the industrial control integrated machine display unit, including: opening the handheld terminal device, and setting the linear laser sensor parameters, motor drive parameters, result display parameters, and data storage parameters in the parameter setting interface.

[0025] In one embodiment, the setting of the result display parameters includes the setting of the coordinate system, and the step S3 determines the center O of the fitted arc and the two endpoints C and D of the wear surface determined by the contact line wear surface contour, which are the coordinate values ​​of the two endpoints C and D of the wear surface determined by the fitted arc center O and the contact line wear surface contour respectively.

[0026] In one embodiment, after calculating the wear area S of the actual rigid contact network contact line, the industrial control integrated computer displays the detection results and anomaly marks the measurement abnormal points in the form of a list.

[0027] In one embodiment, after the abnormality marking is completed, the remaining service life of the contact network is calculated by comparing with historical measurement results.

[0028] The beneficial effect of the rigid contact network contact line wear measurement method of the present invention is that the present invention realizes real-time detection of rigid contact network contact line wear without affecting line operation. The measurement method of the present invention calculates the wear area of ​​the rigid contact network contact line and can further calculate the remaining service life of the contact network so as to replace the contact network in time. The measurement method of the present invention is simple and is not subject to the influence of bad weather. Compared with manual high-altitude measurement, the detection efficiency and detection accuracy are higher, and it can be viewed remotely. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the process of a method for measuring contact wire wear of a rigid contact network according to an embodiment of the present invention;

[0030] Figure 2 A schematic diagram of a measuring device used in a method for measuring contact wire wear of a rigid contact network according to an embodiment of the present invention;

[0031] Figure 3 The figure is a schematic diagram of the internal structure of a measuring device used in a method for measuring contact line wear of a rigid contact network according to an embodiment of the present invention.

[0032] Reference numerals

[0033] 1. Detector; 11. Traveling trolley; 2. Bus; 3. Contact wire; 4. Infrared camera; 5. Linear laser sensor; 6. Reflective photoelectric; 7. Travel switch assembly; 8. Stepper motor; 9. Aviation plug. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the invention and are not used to limit the invention.

[0035] The present invention provides a method for measuring the wear of a rigid contact wire, comprising the following steps:

[0036] Step S1, arranging the measuring device and setting the measuring parameters, scanning and acquiring the contact line profile of the rigid contact network;

[0037] Step S2, analyzing the obtained contact line profile of the rigid contact network to obtain the contact line unworn surface profile and the contact line worn surface profile;

[0038] Step S3, fitting the unworn surface profile of the contact line obtained in step S2 to obtain the theoretical profile of the contact line A⌒B, and determining the center O of the fitting arc and the diameter length d of the fitting arc according to the curvature of the fitting arc, determining the two end points C and D of the worn surface according to the worn surface profile of the contact line obtained in step S2, and obtaining the distance L between the two end points C and D of the worn surface by fitting. CD ;

[0039] Step S4: according to the distance L between the two end points C and D of the wear surface obtained in step S3, CD , fit the arc diameter length d, calculate the arc center O to L CD The distance between OE ;

[0040] Step S5, through L 0E And the diameter length d of the fitting arc, calculate the remaining height L of the contact line;

[0041] Step S6, by fitting the diameter length d of the arc, the remaining height L of the contact line, and the distance L between the two end points C and D of the wear surface CD Calculate the wear area S of the actual rigid contact line.

[0042] Further, in step S4, the arc center O to L CD The distance between OE It is obtained by the first formula, which is: OE =1 / 2*d*COS(sin-1(L CD )).

[0043] Further, in step S5, the remaining height L of the contact line is obtained by a second formula, wherein the second formula is: L = 1 / 2*d + L OE .

[0044] Further, in step S6, the actual wear area S of the rigid contact wire is equal to the area S of the theoretical sector OCD. 扇OCD - Area S of triangle OCD △OCD .

[0045] Furthermore, the area S of the theoretical sector OCD is 扇OCD The calculation formula is as follows: 扇 =1 / 4*d 2 *sin -1 (L CD / d); the area of ​​the triangle OCD is S △OCD The calculation formula is as follows: △ =1 / 4*L CD *√(d 2 -L 2 ).

[0046] Further, if Figure 2-3 As shown, the measuring device in step S1 includes: a detector 1 and an industrial control integrated machine connected to each other. The detector 1 includes a walking trolley 11, which is suspended on the bus 2 and can move along the bus 2. The walking trolley 11 is equipped with an aviation plug 9, a travel switch assembly 7, a linear laser sensor 5, an infrared camera 4, a reflective photoelectric 6, a stepper motor 8 and a stepper motor controller. The stepper motor controller controls the forward and reverse movement of the stepper motor 8 to drive the trolley forward and backward. The signal of the travel switch assembly 7 is disconnected to control the walking trolley 11 to stop moving. The linear laser sensor 5 scans the contour of the contact line 3, the infrared camera 4 records in real time, and the reflective photoelectric 6 detects the interface of the bus 2. A power module is provided on the industrial control integrated machine, and the power module supplies power to the stepper motor 8, the travel switch assembly 7, the linear laser sensor 5, the infrared camera 4, the reflective photoelectric 6, the industrial control integrated machine, and the stepper motor controller through the aviation plug.

[0047] Arranging the measuring device includes: hanging the detector 1 on the bus and turning it on.

[0048] Among them, the industrial control integrated machine is connected with the linear laser sensor 5, the infrared camera 4, and the reflective photoelectric 6 for IP matching. In this embodiment, the mini computer host in the industrial control integrated machine is used as an image acquisition computer. The image acquisition computer is connected to the infrared camera 4 through a USB3.0 interface, stores image acquisition videos and pictures, and is combined with the linear laser sensor 5 to process data. If the set deviation is exceeded, an alarm is issued in time and the alarm position is located. The picture and measurement data are displayed in real time, which is convenient for subsequent rapid processing. In this embodiment, the linear laser sensor is installed inside the walking trolley, and the laser point is emitted upward to scan the contour of the contact line. The cross-sectional profile of the contact line is analyzed by the sensor controller in the industrial control integrated machine, so as to calculate the wear of the contact line, and the calculated data is stored inside the industrial control integrated machine for subsequent analysis. The infrared camera can record in real time and transmit the video data to the industrial control integrated machine through an aviation plug. When the measurement data is abnormal, the video screen can be watched or replayed in real time on the industrial control integrated machine, so that the problem point of the contact line can be found in the fastest time.

[0049] Further, setting the measurement parameters is to set the interface configuration parameters of the industrial control integrated machine display unit, including: opening the handheld terminal device, and setting the linear laser sensor parameters, motor drive parameters, result display parameters and data storage parameters in the parameter setting interface.

[0050] Furthermore, the results show that the parameter setting includes the setting of the coordinate system. In step S3, the center O of the fitted arc and the two endpoints C and D of the wear surface determined by the contact line wear surface contour are respectively determined to determine the coordinate values ​​of the center O of the fitted arc and the two endpoints C and D of the wear surface determined by the contact line wear surface contour.

[0051] Furthermore, after calculating the wear area S of the actual rigid contact network contact line, the industrial control integrated computer displays the detection results and marks the abnormal measurement points in the form of a list.

[0052] Furthermore, after the abnormalities are marked, the remaining service life of the contact network can be calculated by comparing with historical measurement results, so that the contact network can be replaced in a timely manner.

[0053] The beneficial effect of the rigid contact network contact line wear measurement method of the present invention is that the present invention realizes real-time detection of rigid contact network contact line wear without affecting line operation. The measurement method of the present invention calculates the wear area of ​​the rigid contact network contact line and can further calculate the remaining service life of the contact network so as to replace the contact network in time. The measurement method of the present invention is simple and is not subject to the influence of bad weather. Compared with manual high-altitude measurement, the detection efficiency and detection accuracy are higher, and it can be viewed remotely.

[0054] The above-described embodiments are only further explanations of the present invention, and are not intended to limit the present invention in other forms. The present invention may also have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding modifications and changes according to the present invention, but these corresponding modifications and changes should all fall within the protection scope of the present invention.

Claims

1. A method for measuring the wear of rigid contact wire. It is characterized in that The steps include: Step S1, arranging the measuring device and setting the measuring parameters, scanning and acquiring the contact line profile of the rigid contact network; Step S2, analyzing the obtained contact line profile of the rigid contact network to obtain the contact line unworn surface profile and the contact line worn surface profile; Step S3, fitting the unworn surface profile of the contact line obtained in step S2 to obtain the theoretical profile of the contact line A⌒B, and determining the center O of the fitting arc and the diameter length d of the fitting arc according to the curvature of the fitting arc, determining the two end points C and D of the worn surface according to the worn surface profile of the contact line obtained in step S2, and obtaining the distance L between the two end points C and D of the worn surface by fitting. CD ; Step S4: according to the distance L between the two end points C and D of the wear surface obtained in step S3, CD , fit the arc diameter length d, calculate the arc center O to L CD The distance between OE ; Step S5, through L 0E And the diameter length d of the fitting arc, calculate the remaining height L of the contact line; Step S6, by fitting the diameter length d of the arc, the remaining height L of the contact line, and the distance L between the two end points C and D of the wear surface CD Calculate the wear area S of the actual rigid contact line.

2. The method for measuring rigid contact wire wear according to claim 1, It is characterized in that In step S4, the arc center O to L CD The distance between OE It is obtained by the first formula, which is: OE =1 / 2*d*COS(sin-1(L CD )).

3. The method for measuring rigid contact wire wear according to claim 1, It is characterized in that In step S5, the remaining height L of the contact line is obtained by a second formula, and the second formula is: L = 1 / 2*d + L OE .

4. The method for measuring rigid contact wire wear according to claim 1, It is characterized in that In step S6, the actual wear area S of the rigid contact wire is equal to the area S of the theoretical sector OCD. 扇OCD - Area S of triangle OCD △OCD .

5. The method for measuring rigid contact wire wear according to claim 4, It is characterized in that The area S of the theoretical sector OCD is 扇OCD The calculation formula is as follows: 扇 =1 / 4*d 2 *sin -1 (L CD / d); The area S of the triangle OCD △OCD The calculation formula is as follows: △ =1 / 4*L CD *√(d 2 -L 2 ).

6. The method for measuring rigid contact wire wear according to claim 1, It is characterized in that The measuring device in step S1 includes: a detector and an industrial control integrated machine connected to each other, the detector includes a walking trolley, the walking trolley is suspended on the bus and can walk along the bus, an aviation plug, a travel switch assembly, a linear laser sensor, an infrared camera, a reflective photoelectric, a stepper motor and a stepper motor controller are installed in the walking trolley, the stepper motor controller controls the forward and reverse movement of the stepper motor to drive the trolley forward and backward, the travel switch assembly signal is disconnected to control the trolley to stop moving, the linear laser sensor scans the contour of the contact line, the infrared camera records in real time, and the reflective photoelectric detects the interface of the bus, and the industrial control integrated machine is provided with a power module, and the power module is used to power the stepper motor, the travel switch assembly, the linear laser sensor, the infrared camera, the reflective photoelectric, the industrial control integrated machine, and the stepper motor controller through the aviation plug; The arrangement of the measuring device comprises: hanging the detector on the bus bar and turning it on; Among them, the industrial control all-in-one computer is connected with the linear laser sensor, infrared camera, and reflective photoelectric through IP matching.

7. The method for measuring rigid contact wire wear according to claim 6, It is characterized in that The setting of the measurement parameters is to set the interface configuration parameters of the industrial control integrated machine display unit, including: opening the handheld terminal device, and setting the linear laser sensor parameters, motor drive parameters, result display parameters and data storage parameters in the parameter setting interface.

8. The method for measuring rigid contact wire wear according to claim 7, It is characterized in that The setting of the result display parameters includes the setting of the coordinate system. In step S3, the center O of the fitted arc and the two endpoints C and D of the wear surface determined by the contact line wear surface contour are respectively determined to determine the coordinate values ​​of the center O of the fitted arc and the two endpoints C and D of the wear surface determined by the contact line wear surface contour.

9. The method for measuring rigid contact wire wear according to claim 1, It is characterized in that After calculating the wear area S of the actual rigid contact line of the overhead contact network, the industrial control integrated computer displays the detection results and marks the abnormal measurement points in the form of a list.

10. The method for measuring rigid contact wire wear according to claim 9, It is characterized in that After the anomaly marking is completed, the remaining service life of the contact network can be calculated by comparing with historical measurement results.

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