CN114426034A - Rail vehicle sliding state detection method and rail vehicle - Google Patents
Rail vehicle sliding state detection method and rail vehicle Download PDFInfo
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- CN114426034A CN114426034A CN202210045030.9A CN202210045030A CN114426034A CN 114426034 A CN114426034 A CN 114426034A CN 202210045030 A CN202210045030 A CN 202210045030A CN 114426034 A CN114426034 A CN 114426034A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61C—LOCOMOTIVES; MOTOR RAILCARS
- B61C17/00—Arrangement or disposition of parts; Details or accessories not otherwise provided for; Use of control gear and control systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L15/00—Indicators provided on the vehicle or train for signalling purposes
- B61L15/0081—On-board diagnosis or maintenance
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Abstract
The invention provides a rail vehicle and a method for detecting a sliding state of the rail vehicle. The rail vehicle sliding state detection method comprises the following steps: responding to the axle sliding signal, and judging the state of the rail vehicle according to a preset condition; if the state of the railway vehicle meets the preset condition, judging that the axle sliding signal is false alarm; and if the state of the railway vehicle does not meet the preset condition, judging that the carriage has a sliding fault. According to the method for detecting the sliding state of the railway vehicle, after the axle sliding signal is obtained, whether the carriage has the sliding fault or not is judged by combining the state of the railway vehicle, so that the problem of misinformation of the sliding fault caused by electromagnetic interference can be avoided, and the accuracy of the detection result of the sliding state of the railway vehicle is improved.
Description
Technical Field
The invention relates to the technical field of railway vehicles, in particular to a method for detecting the sliding state of a railway vehicle and the railway vehicle.
Background
Most of the air brakes used in the prior rail vehicles are adhesive brakes. The braking method realizes braking by means of the adhesion force between the wheel rails, and once the adhesion coefficient of the wheel rails is reduced due to the adhesion of media on the contact surfaces of the wheel rails, the increase of the speed of a train, the change of the radius of a track curve and the like, the adhesion force is insufficient, so that the sliding phenomenon is caused. The phenomenon of sliding between the wheel rails can cause serious damage to wheel treads and the rails, and has potential safety hazards, so that the train has an anti-skid detection function.
In the prior art, the antiskid detection of the train depends on the detection of the speed of each axle by a brake control device for judgment, but because the train powered by AC25kV at high voltage often has the condition that a lifting pantograph and a main breaker act, the electrified disconnection of the extra-high voltage power supply can generate larger electromagnetic interference, so that a speed sensor is interfered, and the condition of false alarm of sliding faults occurs.
Therefore, how to avoid the false alarm problem of the sliding fault caused by the electromagnetic interference becomes a problem to be solved urgently.
Disclosure of Invention
The invention provides a method for detecting the sliding state of a railway vehicle and the railway vehicle.
An embodiment of the invention provides a method for detecting a sliding state of a rail vehicle, which comprises the following steps:
responding to the axle sliding signal, and judging the state of the rail vehicle according to a preset condition;
if the state of the railway vehicle meets the preset condition, judging that the axle sliding signal is false alarm;
and if the state of the railway vehicle does not meet the preset condition, judging that the carriage has a sliding fault.
Under the preset condition, electromagnetic interference can be generated on a shaft end speed sensor which is close to a high-voltage power supply loop, and after the speed sensor is interfered, an instantaneous speed signal is easily generated by mistake.
And judging the axle sliding signal to be false alarm when the condition of the rail vehicle meets the preset condition through judging the condition of the rail vehicle. It is determined that the vehicle compartment has a coasting failure when it is determined that the state of the rail vehicle does not satisfy the preset condition. The problem of false alarm of sliding faults caused by electromagnetic interference is effectively avoided, and the accuracy of the detection result of the sliding state of the carriage is improved.
According to an embodiment of the present invention, the preset condition includes that the rail vehicle is in a stationary state, and accordingly, the determining the state of the rail vehicle according to the preset condition includes:
and judging whether the rail vehicle is in a static state or not.
When the rail vehicle is in a static state, the situation of sliding cannot exist. And there is a possibility of an action capable of generating electromagnetic interference in a stationary state. When the rail vehicle is in a static state and the axle slide signal is received, the axle slide signal is judged to be false alarm. The problem of false alarm of sliding faults caused by electromagnetic interference when the rail vehicle is in a static state can be solved, and the accuracy of the detection result of the sliding state of the carriage is improved.
According to one embodiment of the invention, the determining whether the rail vehicle is in a stationary state comprises:
acquiring a zero-speed hard wire signal of the rail vehicle;
and determining whether the rail vehicle is in a static state or not according to the zero-speed hard wire signal.
According to one embodiment of the invention, the determining whether the rail vehicle is in a stationary state comprises:
acquiring the traction speed and the braking speed of the railway vehicle;
and determining whether the rail vehicle is in a static state or not according to the traction speed and the braking speed.
According to an embodiment of the present invention, the preset condition further includes that the rail vehicle is in a split-phase passing state, and accordingly, the determining the state of the rail vehicle according to the preset condition further includes:
and judging whether the rail vehicle is in a passing neutral section state or not.
When the rail vehicle is in the passing neutral section state, there is a possibility that an action capable of generating electromagnetic interference is generated. When the railway vehicle is in the passing neutral section state and the axle sliding signal is received, the axle sliding signal is judged to be false alarm. The problem of false alarm of sliding faults caused by electromagnetic interference when the rail vehicle is in the over-phase separation state can be solved, and the accuracy of the detection result of the sliding state of the carriage can be further improved.
According to an embodiment of the invention, the determining whether the rail vehicle is in a split-phase state comprises:
acquiring a passing phase advance notice signal or a passing phase forcing signal of the railway vehicle;
and determining whether the rail vehicle is in the passing neutral section state or not according to the passing neutral section forecasting signal or the passing neutral section forcing signal.
According to one embodiment of the invention, the determining whether the rail vehicle is in a passing neutral section state comprises:
acquiring the position of the rail vehicle;
and determining whether the rail vehicle is in a passing neutral section state or not according to the position of the rail vehicle.
According to an embodiment of the present invention, after determining that the vehicle compartment has a coasting failure, the method further includes:
recording the coasting failure;
and outputting a sliding alarm signal.
According to an embodiment of the present invention, before responding to the axle coasting signal, the method further comprises:
acquiring the real-time rotating speed of each axle of the carriage;
and respectively carrying out sliding judgment on each axle according to the real-time rotating speed of each axle of the carriage.
In another aspect, an embodiment of the present invention further provides a rail vehicle, which includes a rail vehicle body and a detection system, where the detection system is configured to detect a sliding state of each carriage of the rail vehicle body, and the detection system is configured to execute the above method for detecting a sliding state of a rail vehicle.
According to the method for detecting the sliding state of the railway vehicle, provided by the embodiment of the invention, after the axle sliding signal is obtained, the state of the railway vehicle is judged according to the preset condition. Because under the preset condition, electromagnetic interference can be generated on the speed sensor, and instantaneous speed signals are easy to be generated by mistake. In the embodiment of the invention, after the axle slide signal is responded, when the condition of the railway vehicle is determined to meet the preset condition, the axle slide signal is judged to be misinformed. It is determined that the vehicle compartment has a coasting failure when it is determined that the state of the rail vehicle does not satisfy the preset condition. The problem of false alarm of sliding faults caused by electromagnetic interference can be avoided, and the accuracy of the detection result of the sliding state of the carriage can be improved.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a first flowchart of a method for detecting a sliding state of a rail vehicle according to an embodiment of the present invention;
FIG. 2 is a flow chart of determining a state of a rail vehicle according to preset conditions, according to an embodiment of the present invention;
FIG. 3 is a flow chart of determining axle coasting provided by an embodiment of the present invention;
fig. 4 is a second flowchart of a method for detecting a sliding state of a rail vehicle according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, 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.
As shown in fig. 1 to 4, in a first aspect, an embodiment of the present invention provides a method for detecting a sliding state of a rail vehicle, including the following steps:
if the state of the railway vehicle meets the preset condition, judging that the axle sliding signal is false alarm;
and if the state of the railway vehicle does not meet the preset condition, judging that the carriage has a sliding fault.
Namely, after the axle coasting signal is acquired, the state of the rail vehicle is also judged according to the preset condition.
The axle coasting signal is generally obtained by detecting the speed of each axle by a brake control device, and the speed of the axle is obtained by a speed sensor provided on the axle. Under the preset condition, electromagnetic interference can be generated on the shaft end speed sensor which is close to the high-voltage power supply loop, and after the speed sensor is interfered, an instantaneous speed signal is easily generated by mistake.
And judging the axle sliding signal to be false alarm when the condition of the rail vehicle meets the preset condition through judging the condition of the rail vehicle. It is determined that the vehicle compartment has a coasting failure when it is determined that the state of the rail vehicle does not satisfy the preset condition. The problem of false alarm of sliding faults caused by electromagnetic interference is effectively avoided, and the accuracy of the detection result of the sliding state of the carriage is improved.
In an embodiment of the present invention, the preset condition includes that the rail vehicle is in a stationary state, and accordingly, the step of determining the state of the rail vehicle according to the preset condition includes:
and step 111, judging whether the rail vehicle is in a static state.
When the rail vehicle is in a stationary state, no coasting situation is possible. However, since the rail vehicle is in a stationary state, a driver or a maintenance worker on the rail vehicle may operate the lifting pantograph or open and close the main circuit breaker.
The transient change of the extra-high voltage power supply can generate stronger electromagnetic interference. The shaft end speed sensor which is close to the high-voltage power supply loop is easy to interfere and easy to generate an instantaneous speed signal by mistake. The brake control device is electrically connected with the rail vehicle network control system, and once the instant speed signal value generated by mistake meets the condition that the brake control device judges the axle sliding, the brake control device can report the axle sliding signal to the rail vehicle network control system. Communication means between the brake control device and the rail vehicle network control system include, but are not limited to, MVB, ethernet, RS485, and the like.
In the embodiment of the invention, the action of judging whether the rail vehicle is in the static state is implemented by the rail vehicle network control system, and the rail vehicle network control system judges the state of the rail vehicle after acquiring the axle sliding signal. When the rail vehicle is determined to be in a static state, the axle sliding signal can be determined to be generated by electromagnetic interference, and the axle sliding signal is judged to be false alarm; when it is determined that the rail vehicle is not in a stationary state, it is determined that the vehicle compartment has a coasting failure. Therefore, the problem of false alarm of the sliding fault caused by electromagnetic interference when the rail vehicle is in a static state can be solved.
In the embodiment of the present invention, the above-mentioned determination of whether the rail vehicle is in a stationary state may be, but not limited to, a determination according to a zero-speed hard-line signal of the rail vehicle, or a calculation determination according to a traction speed and a braking speed.
In one embodiment, when determining whether the rail vehicle is in a stationary state according to the zero-speed hard wire signal of the rail vehicle, the network control system of the rail vehicle needs to obtain the zero-speed hard wire signal of the rail vehicle, and the zero-speed hard wire signal of the rail vehicle can be used as a basis for determining whether the speed of the rail vehicle is zero. When the zero-speed hard-line signal is high level, the speed of the rail vehicle is zero. When the zero-speed hard wire signal is at a low level, the speed of the rail vehicle is not zero. Thus, it can be determined whether the rail vehicle is in a stationary state based on the zero speed hard wire signal.
In another embodiment, when determining whether the rail vehicle is in a stationary state according to the traction speed and the braking speed of the rail vehicle, the rail vehicle network control system needs to first acquire the traction speed and the braking speed of the rail vehicle. The traction speed and the braking speed can be used as a basis for judging whether the vehicle speed is zero or not. When the traction speed and the braking speed are not zero, the speed of the rail vehicle is not zero, and the rail vehicle is not in a static state; when the traction speed and the braking speed are both zero, the speed of the rail vehicle is zero, and the rail vehicle is in a static state. From this, it can be determined whether the rail vehicle is in a stationary state or not, based on the traction speed and the braking speed.
The axle of the rail vehicle is provided with a braking speed sensor and a traction speed sensor, and the speed value of the rail vehicle is acquired in real time. The traction speed and the braking speed are detected by a traction speed sensor and a braking speed sensor, respectively. The traction speed sensor and the brake speed sensor may be electrically connected to the rail vehicle network control system to send detection signals directly to the rail vehicle network control system.
In an embodiment of the present invention, the preset condition further includes whether the rail vehicle is in a passing neutral section state, and accordingly, the step of determining the state of the rail vehicle according to the preset condition further includes:
and step 112, judging whether the railway vehicle is in a passing neutral section state.
In the embodiment of the invention, after the axle sliding signal is acquired and the rail vehicle is determined not to be in the static state, whether the rail vehicle is in the passing neutral section state or not needs to be judged.
When the rail vehicle is in the passing neutral section state, the main circuit breaker of the rail vehicle also performs opening and closing actions. The transient change of the extra-high voltage power supply can generate stronger electromagnetic interference. The shaft end speed sensor which is close to the high-voltage power supply loop is easy to interfere and easy to generate an instantaneous speed signal by mistake. The transient change of the extra-high voltage power supply can generate stronger electromagnetic interference. The shaft end speed sensor which is close to the high-voltage power supply loop is easy to interfere and easy to generate an instantaneous speed signal by mistake.
Therefore, when the railway vehicle is determined to be in the passing neutral section state, the axle slide signal can be determined to be generated by electromagnetic interference, and the axle slide signal is judged to be false alarm; when it is determined that the rail vehicle is not in the passing neutral state, it is determined that the car has a coasting failure. Therefore, the problem of false alarm of the sliding fault caused by electromagnetic interference when the railway vehicle is in the over-phase separation state can be solved, and the accuracy of the detection result of the sliding state of the carriage can be further improved.
In the embodiment of the present invention, the above-mentioned determination as to whether the rail vehicle is in the passing neutral section state may be, but not limited to, the determination according to the passing neutral section advance notice signal or the passing neutral section forcing signal of the rail vehicle, or the determination according to the position of the rail vehicle.
In one embodiment, when determining whether the rail vehicle is in the passing phase state according to the passing phase advance notice signal or the passing phase forcing signal of the rail vehicle, the rail vehicle network control system needs to acquire the passing phase advance notice signal or the passing phase forcing signal of the rail vehicle.
Ground sensors are respectively embedded in the front and the rear of the two phase separation areas, a vehicle sensor is arranged on the rail vehicle, the vehicle sensor is electrically connected with an automatic passing phase signal processor of the rail vehicle, and the automatic passing phase separation signal processor is electrically connected with a rail vehicle network control system.
When the automatic passing neutral section signal processor judges that the vehicle sensor receives the passing neutral section forecasting signal, the passing neutral section forecasting signal is sent to the rail vehicle network control system, and after the rail vehicle network control system obtains the passing neutral section forecasting signal, the main circuit breaker is switched off after a relevant strategy is executed.
When the automatic passing neutral section signal processor judges that the vehicle sensor receives the passing neutral section forcing signal, the passing neutral section forcing signal is sent to the rail vehicle network control system, and the rail vehicle network control system immediately breaks the main circuit breaker after acquiring the passing neutral section forcing signal.
Therefore, the passing phase advance notice signal or the passing phase forcing signal can be used as the basis for judging whether the rail vehicle is in the passing phase state or not. And if the railway vehicle network control system receives the passing phase advance notice signal or the passing phase forcing signal, determining that the railway vehicle is in the passing phase state.
In one embodiment, when determining whether the rail vehicle is in the passing phase state according to the position of the rail vehicle, the rail vehicle network control system needs to acquire the mileage mark or the mileage of the rail vehicle. The position of the rail vehicle can be determined by means of the milestone or can be calculated from the mileage of the rail vehicle. And comparing the position of the rail vehicle with the circuit diagram of the rail vehicle to determine whether the rail vehicle is located in the phase separation area, so as to judge whether the rail vehicle is in the phase separation state.
In the embodiment of the present invention, after it is determined in step 110 that the vehicle compartment has a coasting failure, the method further includes the steps of:
The rail vehicle network control system is connected with the ground control center through vehicle-ground wireless communication, and the implementation modes of the vehicle-ground wireless communication include but are not limited to GSM-R, WIFI, LTE, 5G and the like. After the rail vehicle network control system determines that a certain carriage has a sliding fault, the sliding fault is recorded, and a signal that the certain carriage slides is sent to the ground control center.
The coasting warning signal may be at least one of an acoustic signal and an optical signal. The alarm lamp can be specifically realized by arranging a buzzer or an alarm lamp. And a voice alarm can be selected, and related personnel of the ground control center are prompted in a voice broadcasting mode, so that the method is more direct and clear.
The sliding alarm signal can also be embodied on a screen of the ground control center in the form of a text signal.
And the related personnel of the ground control center correspondingly overhauls wheels, rails and the like after the rail vehicle returns to the garage according to the received sliding fault signal of a certain carriage.
In the embodiment of the present invention, before responding to the axle coasting signal in step 110, the method further includes determining that the axle coasts, specifically including the following steps:
and 101, acquiring the real-time rotating speed of each axle of the carriage.
Each car of a rail vehicle has two bogies, each bogie comprising two axles. And a speed sensor is arranged at any shaft end of each axle of each carriage, and each speed sensor of each carriage is connected with the brake control device of the current carriage through a communication cable. Each speed sensor acquires the rotating speed of the corresponding axle in real time and sends a signal to the brake control device. And the brake control device acquires the speed value of each speed sensor in real time.
The speed sensor can be a photoelectric speed sensor or a Hall type rotating speed sensor.
And 102, respectively carrying out sliding judgment on each axle according to the real-time rotating speed of each axle of the carriage.
When the railway vehicle is in a braking or inertia state, the braking control device can perform speed difference method sliding judgment after acquiring the speed values of the speed sensors.
For example, firstly, an axis with the maximum speed value in four axles of each carriage is selected as a reference axis; comparing the difference value of the speed values of the other three axles of each carriage with the speed value of the reference axle; and if the absolute value of the speed difference comparison result is greater than the judgment threshold, judging that the axle slides.
When one of the axles is determined to coast, an axle coasting signal is output.
It should be noted that, when performing coasting judgment, the axis with the smallest speed value may be selected as the reference axis, or the average of the axle speeds of all axles of each car may be selected as the reference axis, and this is not particularly limited herein.
The judgment threshold value can be set to be 2km/h, and the adaptive adjustment can be specifically carried out according to the design characteristics of the vehicle types of all the rail vehicles.
In a second aspect, an embodiment of the present invention further provides a rail vehicle, including a rail vehicle body and a detection system, where the detection system is configured to detect a sliding state of each carriage of the rail vehicle body, and the detection system is configured to execute the method for detecting a sliding state of a rail vehicle provided in any one of the above embodiments. The method for detecting the sliding state of the railway vehicle can avoid the problem of false alarm of the sliding fault caused by electromagnetic interference and has the advantage of high accuracy of the detection result of the sliding state of the carriage. Therefore, when the detection method of the sliding state of the rail vehicle is executed by the detection system of the rail vehicle to detect the sliding state of each carriage of the rail vehicle, the problem of false alarm of the sliding fault caused by electromagnetic interference can be avoided, and the detection system of the rail vehicle has the advantage of high accuracy of the detection result of the sliding state of the carriage. The derivation process of the beneficial effect of the rail vehicle in the embodiment of the present invention is substantially similar to the derivation process of the beneficial effect of the detection method of the rail vehicle sliding state, and therefore, details are not repeated here.
The rail vehicle may be an AC25kV high voltage power supply train.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for detecting a sliding state of a rail vehicle is characterized by comprising the following steps:
responding to the axle sliding signal, and judging the state of the rail vehicle according to a preset condition;
if the state of the railway vehicle meets the preset condition, judging that the axle sliding signal is false alarm;
and if the state of the railway vehicle does not meet the preset condition, judging that the carriage has a sliding fault.
2. The method for detecting the sliding state of the rail vehicle according to claim 1, wherein the preset condition comprises that the rail vehicle is in a static state, and accordingly, the judging the state of the rail vehicle according to the preset condition comprises:
and judging whether the rail vehicle is in a static state or not.
3. The method for detecting the sliding state of the railway vehicle as claimed in claim 2, wherein the step of judging whether the railway vehicle is in a static state comprises the following steps:
acquiring a zero-speed hard wire signal of the rail vehicle;
and determining whether the rail vehicle is in a static state or not according to the zero-speed hard wire signal.
4. The method for detecting the sliding state of the railway vehicle as claimed in claim 2, wherein the step of judging whether the railway vehicle is in a static state comprises the following steps:
acquiring the traction speed and the braking speed of the railway vehicle;
and determining whether the rail vehicle is in a static state or not according to the traction speed and the braking speed.
5. The method for detecting the sliding state of the rail vehicle according to claim 2, wherein the preset condition further includes that the rail vehicle is in a split-phase state, and accordingly, the judging the state of the rail vehicle according to the preset condition further includes:
and judging whether the rail vehicle is in a passing neutral section state or not.
6. The method for detecting the sliding state of the railway vehicle as claimed in claim 5, wherein the step of judging whether the railway vehicle is in the passing phase state comprises the following steps:
acquiring a passing phase advance notice signal or a passing phase forcing signal of the railway vehicle;
and determining whether the rail vehicle is in an over-phase state or not according to the over-phase advance notice signal or the over-phase forcing signal.
7. The method for detecting the sliding state of the railway vehicle as claimed in claim 5, wherein the step of judging whether the railway vehicle is in the passing phase state comprises the following steps:
acquiring the position of the rail vehicle;
and determining whether the rail vehicle is in a passing neutral section state or not according to the position of the rail vehicle.
8. The method for detecting a coasting state of a railway vehicle as claimed in claim 1, wherein after determining that the carriage has a coasting failure, the method further comprises:
recording the coasting failure;
and outputting a sliding alarm signal.
9. The method of claim 1, wherein the step of responding to the axle coasting signal further comprises:
acquiring the real-time rotating speed of each axle of the carriage;
and respectively carrying out sliding judgment on each axle according to the real-time rotating speed of each axle of the carriage.
10. A rail vehicle, characterized by comprising a rail vehicle body and a detection system for detecting a coasting state of each car of the rail vehicle body, wherein the detection system is configured to perform the rail vehicle coasting state detection method according to any one of claims 1 to 9.
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| CN116424373A (en) * | 2023-02-16 | 2023-07-14 | 克诺尔车辆设备(苏州)有限公司 | Rail vehicle sanding control method and device and computer storage medium |
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