CN110979390B - Method and system for repairing polygonal wheel of rail transit vehicle - Google Patents
Method and system for repairing polygonal wheel of rail transit vehicle Download PDFInfo
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- CN110979390B CN110979390B CN201911232495.XA CN201911232495A CN110979390B CN 110979390 B CN110979390 B CN 110979390B CN 201911232495 A CN201911232495 A CN 201911232495A CN 110979390 B CN110979390 B CN 110979390B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
- B61K11/00—Serving peculiar to locomotives, e.g. filling with, or emptying of, water, sand, or the like at the depots
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
- B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
- B61K9/12—Measuring or surveying wheel-rims
Abstract
The invention discloses a method and a system for repairing a polygon of a wheel of a rail transit vehicle, which are used for collecting data information corresponding to different positions of the wheel in rotation; analyzing the data information to judge that the wheel meets the polygonal characteristic, and determining self-repairing to the wheel; acquiring the edge angle position of the wheel, and starting a reverse braking instruction when the wheel rotates to the edge angle position; and receiving a reverse braking instruction and executing reverse braking. Therefore, the invention can realize that the wheel with the polygonal characteristic can be reversely braked to repair the edge angle of the wheel without disassembling the wheel. Compared with the prior art, the wheel repair time is remarkably saved, and the effective service time of the wheel is prolonged as the wheel does not need to be disassembled.
Description
Technical Field
The invention relates to the technical field of rail vehicles, in particular to a method and a system for repairing a polygon of a rail transit vehicle wheel.
Background
At present, the polygon repairing mode of the wheels of the rail transit vehicles adopts off-line repairing, and the wheels are disassembled after the trains are returned to a warehouse and then the wheels are subjected to spin repairing. The method is time-consuming and labor-consuming, and the effective service time of the train is reduced.
Therefore, how to save the time for repairing the wheel and improve the effective use time of the wheel is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of this, the technical problem to be solved by the present invention is how to save the wheel repairing time and improve the effective use time of the wheel, and therefore, the present invention provides a method and a system for repairing a polygon of a wheel of a rail transit vehicle.
In order to achieve the purpose, the invention provides the following technical scheme:
a rail transit vehicle wheel polygon repairing method comprises the following steps:
collecting data information corresponding to different positions of wheel rotation;
analyzing the data information to judge that the wheel meets the polygonal characteristic, and determining self-repairing to the wheel;
acquiring the edge angle position of the wheel, and starting a reverse braking instruction when the wheel rotates to the edge angle position;
and receiving a reverse braking instruction and executing reverse braking.
In an embodiment of the present invention, the acquiring data information corresponding to different positions of wheel rotation includes:
obtaining position information of a tread and the top surface of a wheel rim;
acquiring photoelectric pulse number information when an axle rotates;
and obtaining the height difference values corresponding to different photoelectric pulse information according to the position information and the photoelectric pulse information.
In one embodiment of the present invention, the analyzing the data information to determine that the wheel satisfies the polygon feature includes:
filtering and fitting the height difference values corresponding to different photoelectric pulse information to obtain a height difference curve;
extracting a peak value of the height difference curve, and determining the peak value as a corner characteristic peak value when the peak value is larger than a peak value standard value;
carrying out spectrum analysis on the height difference curve to obtain a spectrum analysis result;
and comparing the quantity of the edge characteristic peak values with the frequency spectrum analysis result, adjusting the peak value standard value until the difference between the quantity of the edge characteristic peak values and the frequency spectrum analysis result exceeds a preset range, determining that the quantity of the edge characteristic peak values is the quantity of the edges, and determining that the position corresponding to the edge characteristic peak values is the edge position.
In an embodiment of the present invention, the acquiring data information corresponding to different positions of wheel rotation includes:
monitoring the vibration characteristics of the wheel;
and acquiring photoelectric pulse number information when the axle rotates.
In one embodiment of the present invention, the analyzing the data information to determine that the wheel satisfies the polygon feature includes:
and (4) separating blind sources of the vibration characteristics of the wheels, acquiring a time curve of the edge position, and determining the edge position.
In one embodiment of the present invention, the obtaining the angular position of the wheel, and the activating the reverse braking command when the wheel rotates to the angular position further includes:
collecting the vehicle speed and the surface state of a track;
and determining the braking force of the reverse braking according to the vehicle speed and the rail surface state.
In one embodiment of the present invention, the receiving a reverse braking command and executing reverse braking further includes:
and monitoring the friction thickness corresponding to the corner position, and if the friction thickness is smaller than the preset thickness, executing reverse braking again.
In one embodiment of the present invention, the receiving a reverse braking command and executing reverse braking further includes: and monitoring the reverse rotation braking frequency, and stopping the reverse rotation braking when the reverse rotation braking frequency reaches a preset frequency.
In one embodiment of the present invention, the determining self-repair of the wheel includes:
estimating total wear of the tread according to the position information of the tread and the top surface of the wheel rim;
when the total wear of the tread is less than the wear limit of the wheel, self-repairing the wheel is determined; otherwise, sending out an early warning for replacing the wheel and not starting a self-repairing instruction of the wheel.
In one embodiment of the present invention, the determining self-repair of the wheel includes:
acquiring the position and route map information of the train to acquire the line working condition of the train;
and when the train is determined to run on the straight section of the track, self-repairing is determined to be carried out on the wheels.
In one embodiment of the invention, when a plurality of wheels meet the polygonal characteristic, the plurality of wheels are subjected to self-repairing time sharing.
The invention also discloses a track traffic vehicle wheel polygon repairing system, which comprises:
the data acquisition unit is used for acquiring data information corresponding to different positions of wheel rotation;
the data processor analyzes the data information to judge that the wheel meets the polygonal characteristic and determines to perform self-repairing on the wheel;
a controller and a memory, the memory storing computer readable program code, the controller to execute the computer readable program code to implement: acquiring the edge angle position of the wheel, and starting a reverse braking instruction when the wheel rotates to the edge angle position;
and the brake is used for receiving the reverse rotation braking instruction and executing reverse rotation braking.
In one embodiment of the present invention, the data collector includes: the laser sensor is used for acquiring position information of the tread and the top surface of the wheel rim; and a speed sensor for acquiring information on the number of photoelectric pulses when the axle is rotated; the laser sensor can obtain height difference values corresponding to different photoelectric pulse information according to the position information and the photoelectric pulse information;
the data processing can carry out filtering and fitting processing on the height difference values corresponding to different photoelectric pulse information to obtain a height difference curve; extracting a peak value of the height difference curve, and determining the peak value as a corner characteristic peak value when the peak value is larger than a peak value standard value; carrying out spectrum analysis on the height difference curve to obtain a spectrum analysis result; and comparing the quantity of the edge characteristic peak values with the frequency spectrum analysis result, adjusting the peak value standard value until the difference between the quantity of the edge characteristic peak values and the frequency spectrum analysis result exceeds a preset range, determining that the quantity of the edge characteristic peak values is the quantity of the edges, and determining that the position corresponding to the edge characteristic peak values is the edge position.
In one embodiment of the present invention, the data collector includes: the laser sensor is used for acquiring position information of the tread and the top surface of the wheel rim; and an axle speed sensor for acquiring the photoelectric pulse number information when the axle rotates;
the data processing can obtain the height difference values corresponding to different photoelectric pulse information according to the position information and the photoelectric pulse information; filtering and fitting the height difference values corresponding to different photoelectric pulse information to obtain a height difference curve; extracting a peak value of the height difference curve, and determining the peak value as a corner characteristic peak value when the peak value is larger than a peak value standard value; carrying out spectrum analysis on the height difference curve to obtain a spectrum analysis result; and comparing the quantity of the edge characteristic peak values with the frequency spectrum analysis result, adjusting the peak value standard value until the difference between the quantity of the edge characteristic peak values and the frequency spectrum analysis result exceeds a preset range, determining that the quantity of the edge characteristic peak values is the quantity of the edges, and determining that the position corresponding to the edge characteristic peak values is the edge position.
In one embodiment of the present invention, the data collector includes: an acceleration sensor for monitoring vibration characteristics of the wheel; and an axle speed sensor for acquiring the photoelectric pulse number information when the axle rotates;
the data processor can separate blind sources of the vibration characteristics of the wheels, acquire a time curve of the corner position and determine the corner position.
In one embodiment of the present invention, the method further includes: the system comprises a vehicle speed sensor for collecting vehicle speed and a collector for collecting track surface state images; the memory also stores program code to cause the controller to:
and determining the braking force of the reverse braking according to the vehicle speed and the rail surface state.
In one embodiment of the present invention, the method further includes: a thickness measuring instrument for monitoring the friction thickness corresponding to the corner position;
the memory also stores program code to cause the controller to: and if the friction thickness is smaller than the preset thickness, executing reverse braking again.
In one embodiment of the present invention, the memory further stores program code to cause the controller to: and monitoring the reverse rotation braking frequency, and stopping the reverse rotation braking when the reverse rotation braking frequency reaches a preset frequency.
In one embodiment of the invention, the data processor further comprises a step of estimating total wear of the tread according to the position information of the tread and the top surface of the wheel rim;
the memory also stores program code to cause the controller to: when the total wear of the tread is less than the wear limit of the wheel, self-repairing the wheel is determined; otherwise, sending out an early warning for replacing the wheel and not starting a self-repairing instruction of the wheel.
In one embodiment of the present invention, the method further includes: acquiring the position and route map information of the train to obtain a locator of the line working condition of the train;
the memory also stores program code to cause the controller to: and when the train is determined to run on the straight section of the track, self-repairing is determined to be carried out on the wheels.
In one embodiment of the present invention, the memory further stores program code to cause the controller to: when the plurality of wheels meet the polygonal characteristic, the plurality of wheels are self-repaired in time sharing.
According to the technical scheme, when the method and the system for repairing the polygon of the wheel of the rail transit vehicle are used, data information corresponding to different positions of the wheel rotation is collected; analyzing the data information to judge that the wheel meets the polygonal characteristic, and determining self-repairing to the wheel; acquiring the edge angle position of the wheel, and starting a reverse braking instruction when the wheel rotates to the edge angle position; and receiving a reverse braking instruction and executing reverse braking. Therefore, the invention can realize that the wheel with the polygonal characteristic can be reversely braked to repair the edge angle of the wheel without disassembling the wheel. Compared with the prior art, the wheel repair time is remarkably saved, and the effective service time of the wheel is prolonged as the wheel does not need to be disassembled.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a method for repairing a polygon of a wheel of a rail transit vehicle according to an embodiment of the present invention;
fig. 2 is a block diagram of a system for repairing a polygon of a wheel of a rail transit vehicle according to an embodiment of the present invention.
In the figure, 100 is a data collector, 200 is a data processor, 300 is a controller, 400 is a memory, and 500 is a brake.
Detailed Description
The core of the invention is to provide a method and a system for repairing the polygon of the wheel of the rail transit vehicle, so as to save the time for repairing the wheel and improve the effective service time of the wheel.
The embodiments described below do not limit the contents of the invention described in the claims. The entire contents of the configurations shown in the following embodiments are not limited to those required as solutions of the inventions described in the claims.
Referring to fig. 1, the present invention discloses a method for repairing a polygon of a wheel of a rail transit vehicle, including:
step S1: and acquiring data information corresponding to different positions of wheel rotation.
The polygonal features of the wheel may be determined based on the surface features of the wheel, the frequency of vibration of the wheel. The surface features of the wheel may be image information, size information, and the like, among others. When the data information is surface information, the steps specifically include: obtaining position information of a tread and the top surface of a wheel rim; acquiring photoelectric pulse number information when an axle rotates; and obtaining the height difference values corresponding to different photoelectric pulse information according to the position information and the photoelectric pulse information. The position information of the tread and the top surface of the rim is measured by a laser sensor, and the laser sensor can be a point laser sensor or a 2D laser sensor. The laser sensor is arranged on the framework, the distance between the tread and the framework when the laser sensor rotates to the measuring position of the laser sensor and the distance between the top surface of the rim and the framework when the laser sensor rotates to the measuring position of the laser sensor are equal to the distance between the top surface of the rim and the framework when the laser sensor rotates to the measuring position of the laser sensor, and when the laser sensor is a point laser sensor, the data processor obtains the position information and the photoelectric pulse information to obtain the height difference values corresponding to different photoelectric pulse information; and when the laser sensor is a 2D laser sensor, the 2D laser sensor obtains the position information and the photoelectric pulse information to obtain the height difference corresponding to different photoelectric pulse information. The information on the number of photoelectric pulses when the axle is rotated can reflect the position information of the wheel, such as the phase angle of the wheel. The photoelectric pulse number information is collected by an axle speed sensor.
When the data information is the vibration frequency of the wheel, when the wheel has polygonal features, the corners on the wheel can collide with the rail during the rotation of the wheel to cause the vibration of the wheel, so that the frequency of the vibration of the wheel can reflect the number of the multiple edges of the wheel, and the vibration frequency of the wheel can be reflected by the photoelectric pulse number information. At this time, the steps specifically include: monitoring the vibration characteristics of the wheel; and acquiring photoelectric pulse number information when the axle rotates.
Step S2: and analyzing the data information to judge that the wheel meets the polygonal characteristic, and determining to perform self-repairing on the wheel.
As can be seen from the step S1, the present invention adopts two parallel schemes to determine whether the wheel satisfies the polygon feature, wherein the data information corresponding to different positions of the wheel rotation includes: obtaining position information of a tread and the top surface of a wheel rim; acquiring photoelectric pulse number information when an axle rotates; when the height difference corresponding to different photoelectric pulse information is obtained from the position information and the photoelectric pulse information, step S2 includes: filtering and fitting the height difference values corresponding to different photoelectric pulse information to obtain a height difference curve; extracting a peak value of the height difference curve, and determining the peak value as a corner characteristic peak value when the peak value is larger than a peak value standard value; carrying out spectrum analysis on the height difference curve to obtain a spectrum analysis result; and comparing the quantity of the edge characteristic peak values with the frequency spectrum analysis result, adjusting the peak value standard value until the difference between the quantity of the edge characteristic peak values and the frequency spectrum analysis result exceeds a preset range, determining that the quantity of the edge characteristic peak values is the quantity of the edges, and determining that the position corresponding to the edge characteristic peak values is the edge position.
In one embodiment of the present invention, when monitoring wheel vibration characteristics; when the photoelectric pulse number information is acquired during the rotation of the axle, step S2 includes: and (4) separating blind sources of the vibration characteristics of the wheels, acquiring a time curve of the edge position, and determining the edge position. Because the train is in the process of running on the track, the vibration of the wheels relative to the track does not exist, and other vibration forms possibly exist, the analysis accuracy can be improved after the blind source of the vibration characteristics of the wheels is separated.
The self-repairing is carried out on the wheel, and the self-repairing is carried out on the wheel as long as the wheel is determined to meet the polygonal characteristic in the conventional state. However, since the train is in a running state when self-repairing, in order not to affect the comfort level during running, the determining to self-repair the wheel includes: acquiring the position and route map information of the train to acquire the line working condition of the train; and when the train is determined to run on the straight section of the track, self-repairing is determined to be carried out on the wheels.
In addition, although the wheel satisfies the polygonal feature, if the wear is too large, repair is not necessary, and therefore, the determination of self-repair of the wheel includes: estimating total wear of the tread according to the position information of the tread and the top surface of the wheel rim; when the total wear of the tread is less than the wear limit of the wheel, self-repairing the wheel is determined; otherwise, sending out an early warning for replacing the wheel and not starting a self-repairing instruction of the wheel.
Step S3: the angular position of the wheel is obtained and when the wheel rotates to the angular position, a reverse braking command is initiated.
In the invention, the angular position is mainly a phase angle which is measured by an axle speed sensor, and when the phase angle of a wheel reaches the angular position, the controller starts a reverse braking instruction. In this process, the reverse braking command includes information on the duration of the reverse braking, the braking force of the reverse braking, the number of times of the reverse braking, and the like. The braking effect can be influenced by the surface state of the track in different weathers, so that the self-repairing effect is influenced. For this purpose, the step S3 further includes: collecting the vehicle speed and the surface state of a track; and determining the braking force of the reverse braking according to the vehicle speed and the rail surface state. In this step, the self-repairing braking force for different train models under different road conditions is stored in the memory in advance. The braking force can be adjusted empirically.
Step S4: and receiving a reverse braking instruction and executing reverse braking.
Specifically, in the step, a brake is arranged to perform reverse braking, a motor of the brake performs reverse braking after receiving a reverse braking instruction, and when the braking instruction includes braking time, braking times and braking force, the brake performs braking according to the braking time, the braking times and the braking force.
Since braking cannot be performed an unlimited number of times in reverse braking, for this reason, this step S4 further includes: monitoring the friction thickness corresponding to the corner position, and if the friction thickness is smaller than the preset thickness, executing reverse braking again; otherwise, the reverse braking is stopped.
Further, the step S4 further includes: and monitoring the reverse rotation braking frequency, and stopping the reverse rotation braking when the reverse rotation braking frequency reaches a preset frequency.
When the method for repairing the polygon of the wheel of the rail transit vehicle is used, data information corresponding to different positions of the wheel in rotation is collected; analyzing the data information to judge that the wheel meets the polygonal characteristic, and determining self-repairing to the wheel; acquiring the edge angle position of the wheel, and starting a reverse braking instruction when the wheel rotates to the edge angle position; and receiving a reverse braking instruction and executing reverse braking. Therefore, the invention can realize that the wheel with the polygonal characteristic can be reversely braked to repair the edge angle of the wheel without disassembling the wheel. Compared with the prior art, the wheel repair time is remarkably saved, and the effective service time of the wheel is prolonged as the wheel does not need to be disassembled.
The above description is only given for one wheel, and when a plurality of wheels satisfy the polygonal feature, the plurality of wheels are self-repaired in time sharing.
Referring to fig. 2, the present invention also discloses a system for repairing a polygon of a wheel of a rail transit vehicle, comprising:
the data acquisition device 100 is used for acquiring data information corresponding to different positions of wheel rotation;
the data processor 200 analyzes the data information to judge that the wheel meets the polygonal characteristic and determines to perform self-repairing on the wheel;
a controller 300 and a memory 400, the memory 400 storing computer readable program code, the controller 300 to execute the computer readable program code to implement: acquiring the edge angle position of the wheel, and starting a reverse braking instruction when the wheel rotates to the edge angle position;
and a brake 500 for receiving the reverse braking command and performing reverse braking.
When the polygonal repairing system for the wheels of the rail transit vehicle is used, the data acquisition unit 100 acquires data information corresponding to different positions of the wheels in rotation; the data processor 200 analyzes the data information to judge that the wheel meets the polygonal characteristic and determines to perform self-repairing on the wheel; the controller 300 obtains the angular position of the wheel, and starts a reverse braking instruction when the wheel rotates to the angular position; the brake 500 receives the reverse rotation brake command and performs reverse rotation braking. Therefore, the invention can realize that the wheel with the polygonal characteristic can be reversely braked to repair the edge angle of the wheel without disassembling the wheel. Compared with the prior art, the wheel repair time is remarkably saved, and the effective service time of the wheel is prolonged as the wheel does not need to be disassembled.
The polygonal features of the wheel may be determined based on the surface features of the wheel, the frequency of vibration of the wheel. The surface features of the wheel may be image information, size information, and the like, among others. When the data information is surface information, the data collector 100 includes: the laser sensor is used for acquiring position information of the tread and the top surface of the wheel rim; and a speed sensor for acquiring information on the number of photoelectric pulses when the axle is rotated; the laser sensor can obtain height difference values corresponding to different photoelectric pulse information according to the position information and the photoelectric pulse information;
the data processor 200 can perform filtering and fitting processing on the height difference values corresponding to different photoelectric pulse information to obtain a height difference curve; extracting a peak value of the height difference curve, and determining the peak value as a corner characteristic peak value when the peak value is larger than a peak value standard value; carrying out spectrum analysis on the height difference curve to obtain a spectrum analysis result; and comparing the quantity of the edge characteristic peak values with the frequency spectrum analysis result, adjusting the peak value standard value until the difference between the quantity of the edge characteristic peak values and the frequency spectrum analysis result exceeds a preset range, determining that the quantity of the edge characteristic peak values is the quantity of the edges, and determining that the position corresponding to the edge characteristic peak values is the edge position.
The laser sensor may be a point laser sensor or a 2D laser sensor. The laser sensor is arranged on the framework, the distance between the tread and the framework when the laser sensor rotates to the measuring position of the laser sensor and the distance between the top surface of the wheel rim and the framework when the laser sensor rotates to the measuring position of the laser sensor are obtained, and when the laser sensor is a point laser sensor, the data processor 200 obtains the position information and the photoelectric pulse information to obtain the height difference values corresponding to different photoelectric pulse information; and when the laser sensor is a 2D laser sensor, the 2D laser sensor obtains the position information and the photoelectric pulse information to obtain the height difference corresponding to different photoelectric pulse information. The information on the number of photoelectric pulses when the axle is rotated can reflect the position information of the wheel, such as the phase angle of the wheel. The photoelectric pulse number information is collected by an axle speed sensor.
The data collector 100 includes: the laser sensor is used for acquiring position information of the tread and the top surface of the wheel rim; and an axle speed sensor for acquiring the photoelectric pulse number information when the axle rotates;
the data processing can obtain the height difference values corresponding to different photoelectric pulse information according to the position information and the photoelectric pulse information; filtering and fitting the height difference values corresponding to different photoelectric pulse information to obtain a height difference curve; extracting a peak value of the height difference curve, and determining the peak value as a corner characteristic peak value when the peak value is larger than a peak value standard value; carrying out spectrum analysis on the height difference curve to obtain a spectrum analysis result; and comparing the quantity of the edge characteristic peak values with the frequency spectrum analysis result, adjusting the peak value standard value until the difference between the quantity of the edge characteristic peak values and the frequency spectrum analysis result exceeds a preset range, determining that the quantity of the edge characteristic peak values is the quantity of the edges, and determining that the position corresponding to the edge characteristic peak values is the edge position.
When the data information is the vibration frequency of the wheel, the data collector 100 includes: an acceleration sensor for monitoring vibration characteristics of the wheel; and an axle speed sensor for acquiring the photoelectric pulse number information when the axle rotates;
the data processor 200 can separate blind sources of wheel vibration characteristics, obtain a time curve of the corner position, and determine the corner position.
The self-repairing is carried out on the wheel in a determined mode, and the self-repairing is carried out on the wheel in a conventional state as long as the wheel is determined to meet the polygonal characteristic. However, since the train is in a running state during self-repairing, in order not to affect the comfort level during running, the system further comprises: acquiring the position and route map information of the train to obtain a locator of the line working condition of the train; the memory 400 also stores program code to cause the controller 300 to implement: and when the train is determined to run on the straight section of the track, self-repairing is determined to be carried out on the wheels.
In addition, although the wheel satisfies the polygonal feature, if the wear is too large, it is not necessary to perform the repair, and therefore, the system further includes: the data processor 200 further comprises estimating total tread wear based on the position information of the tread and the top surface of the rim; the memory 400 also stores program code to cause the controller 300 to implement: when the total wear of the tread is less than the wear limit of the wheel, self-repairing the wheel is determined; otherwise, sending out an early warning for replacing the wheel and not starting a self-repairing instruction of the wheel.
In the present invention, the angular position is primarily the phase angle measured by the axle speed sensor, and when the wheel phase angle reaches the angular position, the controller 300 initiates a reverse braking command. In this process, the reverse braking command includes information on the duration of the reverse braking, the braking force of the reverse braking, the number of times of the reverse braking, and the like. The braking effect can be influenced by the surface state of the track in different weathers, so that the self-repairing effect is influenced. The system further comprises: a thickness measuring instrument for monitoring the friction thickness corresponding to the corner position; the memory 400 also stores program code to cause the controller 300 to implement: and if the friction thickness is smaller than the preset thickness, executing reverse braking again.
Because braking can not be carried out for infinite times during reverse braking, a vehicle speed sensor for collecting vehicle speed and a collector for collecting track surface state images are adopted; the memory 400 also stores program code to cause the controller 300 to implement: and determining the braking force of the reverse braking according to the vehicle speed and the rail surface state.
Further, the memory 400 stores program codes to cause the controller 300 to implement: and monitoring the reverse rotation braking frequency, and stopping the reverse rotation braking when the reverse rotation braking frequency reaches a preset frequency.
Described above with respect to only one wheel, when a plurality of wheels satisfy the polygonal feature, the memory 400 further stores program codes to cause the controller 300 to implement: when the plurality of wheels meet the polygonal characteristic, the plurality of wheels are self-repaired in time sharing.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
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 (17)
1. A rail transit vehicle wheel polygon repairing method is characterized by comprising the following steps:
acquiring data information corresponding to different positions of wheel rotation in a driving state;
analyzing the data information to judge that the wheel meets the polygonal characteristic, and determining self-repairing to the wheel;
acquiring the edge angle position of the wheel, and starting a reverse braking instruction when the wheel rotates to the edge angle position;
a motor of the brake receives a reverse braking instruction and executes reverse braking;
wherein, the data information that the different positions of collection wheel rotation correspond includes: obtaining position information of a tread and the top surface of a wheel rim; acquiring photoelectric pulse number information when an axle rotates; and obtaining height difference values corresponding to different photoelectric pulse information according to the position information and the photoelectric pulse information;
the analyzing the data information to determine that the wheel satisfies the polygon feature includes: filtering and fitting the height difference values corresponding to different photoelectric pulse information to obtain a height difference curve; extracting a peak value of the height difference curve, and determining the peak value as a corner characteristic peak value when the peak value is larger than a peak value standard value; carrying out spectrum analysis on the height difference curve to obtain a spectrum analysis result; and comparing the quantity of the edge characteristic peak values with the frequency spectrum analysis result, when the difference between the quantity of the edge characteristic peak values and the frequency spectrum analysis result exceeds a preset range, adjusting the peak standard value until the difference between the quantity of the edge characteristic peak values and the frequency spectrum analysis result is within the preset range, determining the quantity of the edge characteristic peak values as the quantity of the edges, and determining the position corresponding to the edge characteristic peak values as the position of the edges.
2. The method for repairing the polygon of the wheel of the rail transit vehicle as claimed in claim 1, wherein the collecting data information corresponding to different positions of the wheel rotation comprises:
monitoring the vibration characteristics of the wheel;
and acquiring photoelectric pulse number information when the axle rotates.
3. The method for repairing a polygon of a wheel of a rail transit vehicle as claimed in claim 1, wherein said analyzing said data information to determine that a wheel satisfies a polygon feature comprises:
and (4) separating blind sources of the vibration characteristics of the wheels, acquiring a time curve of the edge position, and determining the edge position.
4. The method as claimed in claim 1, wherein the obtaining of the angular position of the wheel and the initiating of the reverse braking command when the wheel is rotated to the angular position further comprises:
collecting the vehicle speed and the surface state of a track;
and determining the braking force of the reverse braking according to the vehicle speed and the rail surface state.
5. The method of claim 1, wherein the motor of the brake receives a reverse braking command and performs reverse braking further comprises:
and monitoring the friction thickness corresponding to the corner position, and if the friction thickness is smaller than the preset thickness, executing reverse braking again.
6. The method of claim 1, wherein the motor of the brake receives a reverse braking command and performs reverse braking further comprises: and monitoring the reverse rotation braking frequency, and stopping the reverse rotation braking when the reverse rotation braking frequency reaches a preset frequency.
7. The method of claim 1, wherein the determining to self-repair the wheel comprises:
estimating total wear of the tread according to the position information of the tread and the top surface of the wheel rim;
when the total wear of the tread is less than the wear limit of the wheel, self-repairing the wheel is determined; otherwise, sending out an early warning for replacing the wheel and not starting a self-repairing instruction of the wheel.
8. The method of claim 1, wherein the determining to self-repair the wheel comprises:
acquiring the position and route map information of the train to acquire the line working condition of the train;
and when the train is determined to run on the straight section of the track, self-repairing is determined to be carried out on the wheels.
9. The method for repairing a polygon of a wheel of a rail transit vehicle according to claim 1,
when the plurality of wheels meet the polygonal characteristic, the plurality of wheels are self-repaired in time sharing.
10. A rail transit vehicle wheel polygon repair system, comprising:
the data acquisition unit is used for acquiring data information corresponding to different positions of wheel rotation;
the data processor analyzes the data information to judge that the wheel meets the polygonal characteristic and determines to perform self-repairing on the wheel;
a controller and a memory, the memory storing computer readable program code, the controller to execute the computer readable program code to implement: acquiring the edge angle position of the wheel, and starting a reverse braking instruction when the wheel rotates to the edge angle position;
the motor of the brake receives a reverse rotation braking instruction and executes reverse rotation braking;
the data collector comprises: the laser sensor is used for acquiring position information of the tread and the top surface of the wheel rim; and an axle speed sensor for acquiring the photoelectric pulse number information when the axle rotates;
the data processing can obtain the height difference values corresponding to different photoelectric pulse information according to the position information and the photoelectric pulse information; filtering and fitting the height difference values corresponding to different photoelectric pulse information to obtain a height difference curve; extracting a peak value of the height difference curve, and determining the peak value as a corner characteristic peak value when the peak value is larger than a peak value standard value; carrying out spectrum analysis on the height difference curve to obtain a spectrum analysis result; and comparing the quantity of the edge characteristic peak values with the frequency spectrum analysis result, adjusting the peak value standard value until the difference between the quantity of the edge characteristic peak values and the frequency spectrum analysis result exceeds a preset range, determining that the quantity of the edge characteristic peak values is the quantity of the edges, and determining that the position corresponding to the edge characteristic peak values is the edge position.
11. The rail transit vehicle wheel polygon repair system of claim 10, wherein the data collector comprises: an acceleration sensor for monitoring vibration characteristics of the wheel; and an axle speed sensor for acquiring the photoelectric pulse number information when the axle rotates;
the data processor can separate blind sources of the vibration characteristics of the wheels, acquire a time curve of the corner position and determine the corner position.
12. The rail transit vehicle wheel polygon repair system of claim 10, further comprising: the system comprises a vehicle speed sensor for collecting vehicle speed and a collector for collecting track surface state images; the memory also stores program code to cause the controller to:
and determining the braking force of the reverse braking according to the vehicle speed and the rail surface state.
13. The rail transit vehicle wheel polygon repair system of claim 10, further comprising: a thickness measuring instrument for monitoring the friction thickness corresponding to the corner position;
the memory also stores program code to cause the controller to: and if the friction thickness is smaller than the preset thickness, executing reverse braking again.
14. The rail transit vehicle wheel polygon repair system of claim 10, wherein the memory further stores program code to cause the controller to: and monitoring the reverse rotation braking frequency, and stopping the reverse rotation braking when the reverse rotation braking frequency reaches a preset frequency.
15. The rail transit vehicle wheel polygon repair system of claim 10,
the data processor also comprises a step of estimating total wear of the tread according to the position information of the tread and the top surface of the wheel rim;
the memory also stores program code to cause the controller to: when the total wear of the tread is less than the wear limit of the wheel, self-repairing the wheel is determined; otherwise, sending out an early warning for replacing the wheel and not starting a self-repairing instruction of the wheel.
16. The rail transit vehicle wheel polygon repair system of claim 10, further comprising: acquiring the position and route map information of the train to obtain a locator of the line working condition of the train;
the memory also stores program code to cause the controller to: and when the train is determined to run on the straight section of the track, self-repairing is determined to be carried out on the wheels.
17. The rail transit vehicle wheel polygon repair system of claim 10,
the memory also stores program code to cause the controller to: when the plurality of wheels meet the polygonal characteristic, the plurality of wheels are self-repaired in time sharing.
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| CN112749441B (en) * | 2020-12-09 | 2023-06-30 | 西南交通大学 | Control method for polygonal abrasion of wheels of rail transit vehicle |
| CN114309835B (en) * | 2021-12-15 | 2023-01-20 | 中车株洲电力机车有限公司 | Profiling repair method and system for wheels of railway vehicle |
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