Method and device for controlling individual slack of a braking system

Abstract

The application provides a control method and device for independent release of a brake system. First, brake data of a locomotive is acquired. Then, a target brake state of the locomotive is determined by using the brake data of the locomotive, wherein the target brake state of the locomotive is an emergency brake state, a penalty brake state or an excessive pressure reduction brake state. A speed parameter of the locomotive and a pressure parameter of the locomotive are acquired. Based on the target brake state of the locomotive, execution of an independent release instruction of the locomotive is limited. Thus, the independent release instruction of the locomotive is limited based on the target brake state of the locomotive, control of the independent release of the brake system is realized, and brake safety of the locomotive is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of rail transit, in particular to a control method and device for separate release of a braking system. BACKGROUND

[0002] At present, the brake machine unconditionally executes the separate release instruction in the abnormal braking working condition, or the execution logic of the separate release instruction is the same as that of the common braking, both of which make the separate release instruction effective. However, after the separate release instruction is cancelled, the locomotive air brake is not restored, which causes a safety hazard of the locomotive.

[0003] In summary, there is an urgent need for a control method for separate release of a braking system to ensure braking safety. SUMMARY

[0004] In view of this, the present application provides a control method and device for separate release of a braking system, which can limit the execution of the separate release instruction, realize the control of the separate release of the braking system, and ensure the braking safety.

[0005] In a first aspect, the present application provides a control method for separate release of a braking system, which comprises:

[0006] obtaining braking data of a locomotive;

[0007] determining a target braking state of the locomotive by using the braking data of the locomotive, wherein the target braking state of the locomotive is an emergency braking state, a penalty braking state or an excessive pressure reduction braking state;

[0008] limiting the execution of a separate release instruction of the locomotive based on the target braking state of the locomotive.

[0009] In a possible implementation manner, the braking data of the locomotive is a pressure drop rate of a train pipe of the locomotive or braking system fault data of the locomotive.

[0010] In a possible implementation manner, the target braking state of the locomotive is determined by using the braking data of the locomotive, which comprises:

[0011] if the pressure drop rate of the train pipe of the locomotive is greater than 80 kPa / s, it is determined that the target braking state of the locomotive is the emergency braking state.

[0012] In a possible implementation manner, the target braking state of the locomotive is the emergency braking state, and the execution of the separate release instruction of the locomotive is limited based on the target braking state of the locomotive, which comprises:

[0013] obtaining a speed parameter of the locomotive and a pressure parameter of the locomotive, wherein the pressure parameter of the locomotive is a total air pressure parameter of the locomotive;

[0014] if the locomotive is in a non-zero speed state or the total air pressure parameter of the locomotive is less than 500 kPa, limiting execution of a separate release instruction of the locomotive.

[0015] In a possible implementation, if a train pipe pressure drop rate of the locomotive is less than 80 kPa / s, the limiting execution of the separate release instruction of the locomotive based on the target braking state of the locomotive comprises:

[0016] obtaining a pressure parameter of the locomotive, wherein the pressure parameter of the locomotive is a constant pressure parameter of a locomotive train pipe pressure of the locomotive and a pressure parameter of the locomotive train pipe of the locomotive;

[0017] if the constant pressure parameter of the locomotive train pipe pressure of the locomotive is 500 kPa and the locomotive train pipe pressure of the locomotive is less than 300 kPa, determining that the target braking state of the train is an excessive pressure reduction braking state, and limiting execution of a separate release instruction of the locomotive;

[0018] or, if the constant pressure parameter of the locomotive train pipe pressure of the locomotive is 600 kPa and the locomotive train pipe pressure of the locomotive is less than 400 kPa, determining that the target braking state of the train is an excessive pressure reduction braking state, and limiting execution of a separate release instruction of the locomotive.

[0019] In a possible implementation, if a train pipe pressure drop rate of the locomotive is less than 80 kPa / s, the limiting execution of the separate release instruction of the locomotive based on the target braking state of the locomotive comprises:

[0020] obtaining a pressure parameter of the locomotive, wherein the pressure parameter of the locomotive is a constant pressure parameter of a locomotive equalizing air cylinder pressure of the locomotive and a pressure parameter of the locomotive equalizing air cylinder of the locomotive;

[0021] if the constant pressure parameter of the locomotive equalizing air cylinder pressure of the locomotive is 500 kPa and the locomotive equalizing air cylinder pressure of the locomotive is less than 300 kPa, determining that the target braking state of the train is an excessive pressure reduction braking state, and limiting execution of a separate release instruction of the locomotive;

[0022] or, if the constant pressure parameter of the locomotive equalizing air cylinder pressure of the locomotive is 600 kPa and the locomotive equalizing air cylinder pressure of the locomotive is less than 400 kPa, determining that the target braking state of the train is an excessive pressure reduction braking state, and limiting execution of a separate release instruction of the locomotive.

[0023] In a possible implementation, the method comprises:

[0024] The position of a brake handle of the locomotive is acquired, and if the brake handle is located at a brake position corresponding to the over-reduced pressure braking state, the target braking state of the train is determined as the over-reduced pressure braking state, and the execution of the individual release instruction of the locomotive is limited.

[0025] In a possible implementation, the target braking state of the locomotive is determined by using the braking data of the locomotive, which comprises:

[0026] If the braking system fault data of the locomotive is included in the braking data of the locomotive, the target braking state of the locomotive is determined as the penalty braking state.

[0027] In a possible implementation, if the target braking state of the locomotive is the penalty braking state, the execution of the individual release instruction of the locomotive is limited.

[0028] In a second aspect, the present application further provides a control device for individual release of a braking system, which comprises:

[0029] An acquisition unit is configured to acquire braking data of a locomotive.

[0030] A determination unit is configured to determine a target braking state of the locomotive by using the braking data of the locomotive, wherein the target braking state of the locomotive is an emergency braking state, a penalty braking state or an over-reduced pressure braking state.

[0031] A limiting unit is configured to limit the execution of an individual release instruction of the locomotive based on the target braking state of the locomotive.

[0032] Based on the above technical solutions, the present application has the following beneficial effects:

[0033] The present application provides a control method and device for individual release of a braking system. First, the braking data of a locomotive is acquired. Then, the target braking state of the locomotive is determined by using the braking data of the locomotive, wherein the target braking state of the locomotive is an emergency braking state, a penalty braking state or an over-reduced pressure braking state. The speed parameter of the locomotive and the pressure parameter of the locomotive are acquired. The execution of an individual release instruction of the locomotive is limited based on the target braking state of the locomotive. In this way, the individual release instruction of the locomotive is limited based on the target braking state of the locomotive, the control of the individual release of the braking system is realized, and the braking safety of the locomotive is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required by the embodiments or the prior art description. Obviously, the drawings described below only relate to the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0035] Figure 1 A flowchart of a control method of separate relief of a brake system provided by an embodiment of the present application;

[0036] Figure 2 A structural diagram of a control device of separate relief of a brake system provided by an embodiment of the present application. DETAILED DESCRIPTION

[0037] In order to facilitate understanding and explanation of the technical solutions provided by the embodiments of the present application, the following will first describe the terms possibly involved in the embodiments of the present application and the background art of the present application:

[0038] It should be noted that performing separate relief means relieving air brake.

[0039] The brake system has a separate relief function, and the separate relief function is to separately relieve air brake of a locomotive and maintain air brake of a vehicle. The separate relief is mainly used after implementation of normal brake, and the main purpose of implementing the separate relief is: ① preventing air brake of the locomotive and traction force from being applied at the same time, and reducing unnecessary brake pad wear; ② when air brake of the whole train is applied, the coupler between the locomotive and the vehicle is in a semi-stretched state, and at this time, traction is applied, which can reduce the "jerking feeling" in the process of brake / traction conversion and improve passenger comfort.

[0040] The abnormal brake is a brake implemented under abnormal operating conditions, and random separate relief is needed to be prohibited for the abnormal operating conditions. The abnormal brake includes emergency brake, excessive pressure reduction brake and punishment brake. ① When the emergency brake is implemented, if the separate relief is effective, i.e., the separate relief instruction is executed to perform separate relief, the air brake of the locomotive must be automatically restored after the separate relief is cancelled; ② The excessive pressure reduction brake is generally actively operated by a person, and the train pipe pressure reduction amount of the locomotive is greater than that of the normal brake, which is mainly used for long-time parking and retreat; ③ The punishment brake is automatically applied when other systems of the locomotive fail, and the train pipe pressure reduction amount does not exceed the normal full brake.

[0041] The existing technical solutions for separate relief control have safety hazards: ① under the emergency brake condition, the brake machine unconditionally executes the separate relief instruction; ② the separate relief logic is the same as the normal brake when the excessive pressure reduction brake and the punishment brake are implemented: the separate relief instruction is effective, and the air brake of the locomotive is not restored after the separate relief instruction is cancelled. Obviously, it is necessary to set some limiting conditions for execution of the separate relief instruction to ensure brake safety.

[0042] In the technical scheme provided in the application, first, braking data of a locomotive is acquired; then, target braking states of the locomotive are determined by using the braking data of the locomotive, wherein the target braking states of the locomotive are emergency braking states, penalty braking states or excessive pressure reduction braking states; speed parameters of the locomotive and pressure parameters of the locomotive are acquired; and execution of individual release instructions of the locomotive is limited based on the target braking states of the locomotive. In this way, the individual release instructions of the locomotive are limited based on the target braking states of the locomotive, the speed parameters of the locomotive and the pressure parameters of the locomotive, so as to guarantee braking safety of the locomotive.

[0043] In order to facilitate understanding of the technical scheme provided in the embodiments of the application, a control method and device for individual release of a braking system provided in the embodiments of the application are described below in combination with the drawings.

[0044] First, referring to Figure 1 The figure is a flowchart of a control method for individual release of a braking system provided in the embodiments of the application, and the method specifically includes S101-S103.

[0045] S101, acquire braking data of a locomotive.

[0046] In a possible implementation manner, the braking data of the locomotive can be received from a braking system of the locomotive, and the braking data of the locomotive can also be acquired from a braking database of the locomotive. The specific manner of acquiring the braking data of the locomotive is not limited here.

[0047] It should be noted that the braking data of the locomotive can be a pressure reduction rate of a train pipe of the locomotive or braking system failure data of the locomotive, and the like. It can be understood that the braking system failure data of the locomotive can be obtained when the braking system of the locomotive fails.

[0048] S102, determine target braking states of the locomotive by using the braking data of the locomotive, wherein the target braking states of the locomotive are emergency braking states, penalty braking states or excessive pressure reduction braking states.

[0049] It can be understood that the target braking states of the locomotive can be divided into emergency braking states, penalty braking states or excessive pressure reduction braking states.

[0050] In a possible implementation, if the brake data of the locomotive is the pressure drop rate of the train pipe of the locomotive, it is determined whether the pressure drop rate of the train pipe of the locomotive is greater than 80 kPa / s, if the pressure drop rate of the train pipe of the locomotive is greater than 80 kPa / s, it is determined that the target brake state of the locomotive is the emergency brake state. If the pressure drop rate of the train pipe of the locomotive is not greater than 80 kPa / s, it is determined that the target brake state of the locomotive is not the emergency brake state.

[0051] In a possible implementation, when the penalty brake instruction sent by the monitoring system of the locomotive is received, the locomotive enters the penalty brake state. Alternatively, if the parking brake of the locomotive is not relieved temporarily, but the locomotive moves, the locomotive enters the penalty brake state. Alternatively, it is determined whether the brake data of the locomotive includes the fault data of the brake system of the locomotive, if the brake data of the locomotive includes the fault data of the brake system of the locomotive, it is determined that the target brake state of the locomotive is the penalty brake state.

[0052] S103, based on the target brake state of the locomotive, limiting execution of the individual relief instruction of the locomotive.

[0053] After obtaining the target brake state of the locomotive, execution of the individual relief instruction of the locomotive can be limited, in the following specific manner:

[0054] In a possible implementation, if the target brake state of the locomotive is the emergency brake state, at this time, the pressure parameter of the locomotive is obtained, the pressure parameter of the locomotive obtained at this time is the total air pressure parameter of the locomotive, it is determined whether the total air pressure parameter of the locomotive is less than 500 kPa, if the total air pressure parameter of the locomotive is less than 500 kPa, execution of the individual relief instruction of the locomotive is limited. It should be noted that the air source of the brake cylinder is the total air, if the total air is insufficient, the brake cylinder pressure cannot be restored to the target value, therefore, when the locomotive is in the emergency brake state, the execution of the individual relief instruction is limited, that is, the air brake relief is limited, and the brake safety of the locomotive is ensured.

[0055] In a possible implementation, if the target brake state of the locomotive is the emergency brake state, at this time, the speed parameter of the locomotive is obtained, if the speed parameter of the locomotive indicates that the locomotive is in a non-zero speed state, that is, the speed of the locomotive is not 0, the execution of the individual relief instruction of the locomotive is limited. At this time, since the control brake relief is limited, it is ensured that the emergency brake can stop, and the brake safety of the locomotive is ensured.

[0056] It should be noted that when the locomotive is in the penalty braking state, the execution of the separate release instruction needs to be limited. The penalty braking is usually a safety guide when the train is abnormal, and therefore, the penalty braking belongs to the abnormal braking condition, and the output of the braking force needs to be ensured, and therefore, the execution of the separate release instruction needs to be limited to ensure the braking safety. For example, the penalty braking is triggered when the locomotive is overspeed, and if the execution of the separate release instruction is not limited at this time, the speed of the locomotive is difficult to be reduced.

[0057] In a possible implementation manner, if the train pipe pressure drop rate of the locomotive is less than 80 kPa / s, that is, the locomotive is not in the emergency braking state, the pressure parameter of the locomotive is obtained, at this time, the pressure parameter of the locomotive is the constant pressure parameter of the locomotive train pipe pressure of the locomotive and the pressure parameter of the locomotive train pipe of the locomotive, it is judged whether the constant pressure parameter of the locomotive train pipe pressure of the locomotive is 500 kPa, if the constant pressure parameter of the locomotive train pipe pressure of the locomotive is 500 kPa, it is judged whether the locomotive train pipe pressure of the locomotive is less than 300 kPa, if the locomotive train pipe pressure of the locomotive is less than 300 kPa, it is determined that the target braking state of the train is the excessive pressure reduction braking state, at this time, the execution of the separate release instruction of the locomotive is limited. If the locomotive train pipe pressure of the locomotive is not less than 300 kPa, it is determined that the target braking state of the train is not the excessive pressure reduction braking state.

[0058] In another possible implementation manner, if the train pipe pressure drop rate of the locomotive is less than 80 kPa / s, that is, the locomotive is not in the emergency braking state, the pressure parameter of the locomotive is obtained, at this time, the pressure parameter of the locomotive is the constant pressure parameter of the locomotive equalizing air cylinder pressure of the locomotive and the pressure parameter of the locomotive equalizing air cylinder of the locomotive, it is judged whether the constant pressure parameter of the locomotive train pipe pressure of the locomotive is 600 kPa, if the constant pressure parameter of the locomotive train pipe pressure of the locomotive is 600 kPa, it is judged whether the locomotive train pipe pressure of the locomotive is less than 400 kPa, if the locomotive train pipe pressure of the locomotive is less than 400 kPa, it is determined that the target braking state of the train is the excessive pressure reduction braking state, at this time, the execution of the separate release instruction of the locomotive is limited. If the locomotive train pipe pressure of the locomotive is less than 400 kPa, it is determined that the target braking state of the locomotive is not the excessive pressure reduction braking state.

[0059] It should be noted that the above manner of obtaining the speed parameter of the locomotive and the pressure parameter of the locomotive can be that the speed parameter of the locomotive and the pressure parameter of the locomotive sent by the state control system of the locomotive are received, or the speed parameter of the locomotive and the pressure parameter of the locomotive are obtained from the database of the locomotive, and the like. The obtaining of the speed parameter of the locomotive and the pressure parameter of the locomotive is not specifically limited herein.

[0060] In a possible implementation, the position of the brake handle of the locomotive can also be acquired, and if the brake handle is located at the brake position corresponding to the over-reduced pressure braking state, the target braking state of the train is determined as the over-reduced pressure braking state, and in this case, the execution of the independent release instruction of the locomotive can be limited.

[0061] It should be noted that, since the over-reduced pressure braking is generally an operation before the brake is accepted, at this time, the driver of the locomotive will leave, and the braking force needs to be ensured to prevent the train from sliding, and therefore, the execution of the independent release instruction needs to be limited when the locomotive is in the over-reduced pressure braking state, so as to control the independent release.

[0062] With Figure 1 Corresponding to the method, the embodiment of the present application also provides a control device for independent release of a braking system, which is used for controlling Figure 1 The control device for independent release of a braking system provided by the embodiment of the present application can be applied to a computer terminal or various mobile devices, and a structure diagram thereof is as shown in Figure 2 The control device for independent release of a braking system provided by the embodiment of the present application specifically comprises:

[0063] 201 an acquisition unit, configured to acquire braking data of a locomotive;

[0064] 202 a determination unit, configured to determine a target braking state of the locomotive by using the braking data of the locomotive, wherein the target braking state of the locomotive is an emergency braking state, a penalty braking state or an over-reduced pressure braking state;

[0065] 204 a limiting unit, configured to limit the execution of an independent release instruction of the locomotive based on the target braking state of the locomotive.

[0066] It should be noted that, in this document, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or device including the element.

[0067] The foregoing description of the disclosed embodiments enables a person skilled in the art to make or use the application. Modifications of these embodiments will occur to persons of skill in the art, and that the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Therefore, the present application 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

1. A method for controlling individual relief of a braking system, characterized in that: The method comprises: Obtaining the braking data of the locomotive; Determining a target braking state of the locomotive using the braking data of the locomotive, wherein the target braking state of the locomotive is: an emergency braking state, a penalty braking state, or an excessive decompression braking state; limiting execution of individual mitigation commands for the locomotive based on a target braking state for the locomotive; The braking data of the locomotive includes: a pressure drop rate of a train pipe of the locomotive; Wherein, if the train pipe pressure drop rate of the locomotive is less than 80 kPa / s, limiting the execution of the individual relief instruction of the locomotive based on the target braking state of the locomotive includes: Obtaining pressure parameters of the locomotive, wherein the pressure parameters of the locomotive are a constant pressure parameter of a locomotive train pipe pressure of the locomotive and a pressure parameter of a locomotive train pipe of the locomotive; If the constant pressure parameter of the locomotive train pipe pressure of the locomotive is 500 kPa and the locomotive train pipe pressure of the locomotive is less than 300 kPa, determining that the target braking state of the train is an over-decompression braking state, and restricting the execution of the individual relief instruction of the locomotive; Alternatively, if the constant pressure parameter of the locomotive train pipe pressure of the locomotive is 600kPa, and the locomotive train pipe pressure of the locomotive is less than 400kPa, the target braking state of the train is determined to be an over-decompression braking state, and the execution of the locomotive's separate relief instruction is restricted.

2. The method according to claim 1, characterized in that The braking data of the locomotive also includes: brake system fault data of the locomotive.

3. The method according to claim 1, characterized in that Determining a target braking state of the locomotive using braking data of the locomotive includes: If the train pipe pressure drop rate of the locomotive is greater than 80 kPa / second, it is determined that the target braking state of the locomotive is an emergency braking state.

4. The method according to claim 3, characterized in that The target braking state of the locomotive is an emergency braking state, and limiting the execution of the individual relief instruction of the locomotive based on the target braking state of the locomotive includes: Acquiring a speed parameter of the locomotive and a pressure parameter of the locomotive, wherein the pressure parameter of the locomotive is a total wind pressure parameter of the locomotive; If the speed parameter of the locomotive indicates that the locomotive is in a non-zero speed state, or the total wind pressure parameter of the locomotive is less than 500 kPa, execution of the individual mitigation command of the locomotive is restricted.

5. The method according to claim 1, wherein If the train pipe pressure drop rate of the locomotive is less than 80 kPa / s, limiting the execution of the individual relief instruction of the locomotive based on the target braking state of the locomotive further includes: Obtaining pressure parameters of the locomotive, wherein the pressure parameters of the locomotive are a constant pressure parameter of a locomotive balancing air cylinder pressure of the locomotive and a pressure parameter of a locomotive balancing air cylinder of the locomotive; If the constant pressure parameter of the locomotive equalizing air cylinder pressure of the locomotive is 500 kPa, and the locomotive equalizing air cylinder pressure of the locomotive is less than 300 kPa, determining that the target braking state of the train is an over-decompression braking state, and restricting the execution of the individual relief instruction of the locomotive; Alternatively, if the constant pressure parameter of the locomotive's equalizing air cylinder pressure is 600kPa, and the locomotive's equalizing air cylinder pressure is less than 400kPa, the target braking state of the train is determined to be an over-decompression braking state, and the execution of the locomotive's separate relief instruction is restricted.

6. The method according to claim 1, characterized in that The method comprises: The position of the brake handle of the locomotive is obtained. If the brake handle is located at the brake position corresponding to the excessive decompression braking state, the target braking state of the train is determined to be the excessive decompression braking state, and the execution of the separate relief instruction of the locomotive is restricted.

7. The method according to claim 2, characterized in that Determining a target braking state of the locomotive using braking data of the locomotive includes: If the braking data of the locomotive includes brake system fault data of the locomotive, the target braking state of the locomotive is determined to be a penalty braking state.

8. The method according to claim 7, characterized in that If the target braking state of the locomotive is the penalty braking state, execution of the individual mitigation command of the locomotive is restricted.

9. A control device for individual relief of a braking system, characterized in that: The device comprises: An acquisition unit is used to acquire braking data of a locomotive; the braking data of the locomotive includes: a pressure drop rate of a train pipe of the locomotive; a determining unit, configured to determine a target braking state of the locomotive using the braking data of the locomotive, wherein the target braking state of the locomotive is: an emergency braking state, a penalty braking state, or an excessive decompression braking state; A limiting unit is used to limit the execution of the separate relief instruction of the locomotive based on the target braking state of the locomotive; wherein, the limiting unit is specifically used to obtain the pressure parameters of the locomotive if the train pipe pressure drop rate of the locomotive is less than 80 kPa / second, wherein the pressure parameters of the locomotive are the fixed pressure parameters of the locomotive train pipe pressure of the locomotive and the pressure parameters of the locomotive train pipe of the locomotive; if the fixed pressure parameter of the locomotive train pipe pressure of the locomotive is 500kPa, and the locomotive train pipe pressure of the locomotive is less than 300kPa, then the target braking state of the train is determined to be an excessive decompression braking state, and the execution of the separate relief instruction of the locomotive is limited; or, if the fixed pressure parameter of the locomotive train pipe pressure of the locomotive is 600kPa, and the locomotive train pipe pressure of the locomotive is less than 400kPa, then the target braking state of the train is determined to be an excessive decompression braking state, and the execution of the separate relief instruction of the locomotive is limited.

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