Rail transit vehicle magnetic track brake control system, method and equipment

Abstract

The invention discloses a magnetic track braking control system which is used for common braking force supplement of a rail transit vehicle and comprises a magnetic track braking control host, a magnetic track braking device and a braking force supplement trigger unit, and the magnetic track braking device is a magnetic track braking execution component of the rail transit vehicle. The magnetic track braking control host is a control host of the magnetic track braking device and is used for sending a magnetic track braking activation signal to the magnetic track braking device for magnetic track braking or canceling sending of the magnetic track braking activation signal to the magnetic track braking device for stopping magnetic track braking; and when the condition of supplementing the braking force is removed, the trigger signal is sent to the magnetic track braking control host, or when the condition of supplementing the braking force is removed, sending of the trigger signal to the magnetic track braking control host is cancelled. When the service braking function is applied, the control system increases the braking force according to different application conditions, the braking effectiveness of the rail transit vehicle is guaranteed, and the driving safety of the rail transit vehicle is guaranteed.

Description

Technical Field

[0001] The invention relates to a magnetic rail braking control system, method and equipment for rail transit vehicles, and belongs to the field of rail transit braking. Background Art

[0002] The existing rail transit braking system generally adopts an air brake system, which uses the adhesion between wheels and rails to generate braking force through the basic brake device. At present, domestic locomotives, EMUs, and subways all use this type of braking. In order to meet the requirements of higher braking performance parameters and ensure the utilization rate of braking adhesion, some European EMUs and some domestic low-floor urban rail transit equipment have added magnetic rail brake devices on the basis of air brake systems. Magnetic rail brake devices can break the limitations of adhesion between wheels and rails and increase braking force, but currently magnetic rail brakes are only used to participate in emergency braking functions as a supplement to air emergency braking performance.

[0003] However, under low adhesion conditions of air braking, magnetic rail braking is not used to improve adhesion and enhance braking performance; during the long-term circulating air common braking application and relief process, magnetic rail braking is not automatically applied, and since the time during the braking relief process affects the timing of re-application of the brakes, the braking performance may be reduced; at the same time, during the long-term circulating air common braking process, the temperature of the basic braking device may be too high, which may also lead to a reduction in braking performance. Summary of the invention

[0004] The present invention aims to provide a magnetic rail braking control system for rail transit vehicles. In view of the safety risks existing in the above-mentioned scenarios, a magnetic rail braking control system is added to the common braking function. When the common braking function is applied, the magnetic rail braking control system effectively supplements the braking force according to different application situations, thereby ensuring the effectiveness of rail transit vehicle braking and ensuring the driving safety of rail transit vehicles.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: a magnetic rail brake control system, the control system is used for common braking force supplement of rail transit vehicles, the control system comprises: a magnetic rail brake control host, a magnetic rail brake device and a braking force supplement trigger unit,

[0006] The magnetic rail brake device is a magnetic rail brake actuator of the rail transit vehicle.

[0007] The magnetic rail brake control host is the control host of the magnetic rail brake device, which is used to send a magnetic rail brake activation signal to the magnetic rail brake device to perform the magnetic rail brake, or cancel the sending of the magnetic rail brake activation signal to the magnetic rail brake device to stop the magnetic rail brake.

[0008] The braking force supplement trigger unit is used to send a trigger signal to the magnetic rail brake control host when the braking force supplement condition is reached, or to cancel sending the trigger signal to the magnetic rail brake control host when the condition for supplementing the braking force is released.

[0009] The common braking is used for the slow deceleration process; the magnetic rail braking is currently only used for emergency braking, and the emergency braking is used for the fast deceleration process.

[0010] According to the embodiments of the present invention, the present invention can be further optimized. The following is the technical solution formed after optimization:

[0011] In one preferred embodiment, the braking force supplement trigger unit is an anti-skid system host or / and a brake control unit or / and a temperature acquisition unit. The anti-skid system host and the brake control unit are essential components of the air brake system. The temperature acquisition unit can be a temperature switch or a temperature sensor or other components added to the basic brake device of the rail transit vehicle. The basic brake device is an actuator of the braking force, such as a brake caliper, a brake disc, and a brake pad.

[0012] Based on the same concept, the present invention also provides a magnetic rail braking control method, which is applied to the magnetic rail braking control system as described above for supplementing the braking force of rail transit vehicles, and the control method specifically includes:

[0013] When the condition for supplementing the braking force is met, the braking force supplement trigger unit sends the trigger signal to the magnetic rail brake control host, and the magnetic rail brake control host sends a magnetic rail brake activation signal to the magnetic rail brake device to perform magnetic rail braking;

[0014] When the condition for supplementing the braking force is released, the braking force supplement trigger unit cancels sending the trigger signal, the magnetic rail brake control host cancels sending the magnetic rail brake activation signal, and the magnetic rail brake device stops magnetic rail braking.

[0015] In one preferred embodiment, the trigger signal is an anti-skid activation signal, and the conditions for achieving the supplementary braking force specifically include:

[0016] When the anti-skid system host is in the anti-skid system activation state, the anti-skid activation signal is sent to the magnetic track brake control host, and the magnetic track brake control host receives the anti-skid activation signal after reaching a first time threshold;

[0017] Accordingly, the conditions for releasing the supplementary braking force specifically include:

[0018] When the anti-skid system host is in a non-anti-skid system activation state, the anti-skid activation signal will be cancelled after the sending of the anti-skid activation signal is cancelled reaches a second time threshold.

[0019] In one preferred embodiment, the trigger signal is a brake release time signal, a speed signal and a speed limit signal, and the condition for achieving the supplementary braking force specifically includes:

[0020] During the braking release time, when v≥v1-△v,

[0021] Correspondingly, the condition for releasing the supplementary braking force specifically includes:

[0022] When the brake release time has been reached or v <v1-△v;

[0023] Among them, v is the real-time speed of the rail transit vehicle, v1 is the braking speed limit value, △v is the speed difference threshold, the braking relief time is provided by the braking relief time signal, the real-time speed of the rail transit vehicle is provided by the speed signal, and the braking speed limit value is provided by the speed limit signal.

[0024] In one preferred embodiment, the trigger signal is a temperature signal, and the condition for achieving the supplementary braking force specifically includes:

[0025] During the cyclic braking process of the common braking of the rail transit vehicle, when T≥T1-△T,

[0026] Correspondingly, the condition for releasing the supplementary braking force specifically includes:

[0027] When T <T1-△T;

[0028] Wherein, T is the real-time temperature of the basic brake of the rail transit vehicle, T1 is the basic brake temperature threshold, and ΔT is the temperature difference threshold. The real-time temperature of the basic brake of the rail transit vehicle is collected by the temperature collection unit. The temperature collection unit collects the real-time temperature of the basic brake device and sends the temperature signal to the magnetic rail brake control host for processing.

[0029] Based on the same concept, the present invention also provides a magnetic rail braking control device, which includes a memory and one or more processors; one or more programs are stored in the memory, and when the one or more programs are executed by the one or more processors, the one or more processors implement the steps of the above method.

[0030] Based on the same concept, the present invention also provides a rail transit vehicle, characterized in that the rail transit vehicle adopts the magnetic rail braking control device as mentioned above to supplement the common braking force of the rail transit vehicle.

[0031] Beneficial Effects

[0032] Compared with the prior art, the advantages of the present invention are:

[0033] In view of the safety risks existing in the actual application of rail transit vehicles, the present invention adds a magnetic rail braking control system to the common braking function and provides a corresponding control method. When the common braking function is applied, the magnetic rail braking effectively supplements the braking force according to different application situations, thereby ensuring the effectiveness of rail transit vehicle braking and ensuring the driving safety of rail transit vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the structure and signals of the magnetic rail braking control system of Example 1 of the present invention. DETAILED DESCRIPTION

[0035] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0036] Example 1

[0037] like Figure 1 As shown, this embodiment provides a magnetic rail brake control system and control method, which is applicable to the following scenarios: when the adhesion coefficient between the common brake wheel and rail of rail transit vehicles is low, the anti-skid system will be activated, thereby reducing the braking force to ensure that the wheel and the rail do not slide, and ultimately affecting the braking performance (i.e., the braking force is reduced). The adhesion coefficient between the wheel and rail varies under the influence of environmental factors such as temperature and humidity during actual application, so the threshold value of the lower adhesion coefficient is not set here.

[0038] For the above application scenarios, according to a magnetic rail brake control system and control method provided by this embodiment, when the anti-skid system host is in the anti-skid system activation state, an anti-skid activation signal is sent to the magnetic rail brake control host. After the magnetic rail brake control host receives the anti-skid activation signal and reaches the first time threshold, it will send a magnetic rail brake activation signal to the magnetic rail brake device to perform magnetic rail braking, supplement sufficient braking force, and ensure that the braking performance is not lost (i.e., restore sufficient braking force). At the same time, the application of magnetic rail braking directly acts on the track, which can improve the state of the track surface, thereby improving the adhesion between the wheel and the track. The wheel and the track will no longer slide, the anti-skid system will exit the activation state, and the air braking force will gradually recover.

[0039] When the anti-skid system host is not in the anti-skid system activation state, the anti-skid activation signal sent to the magnetic track brake control host is cancelled. After the cancellation of the anti-skid activation signal reaches the second time threshold, the magnetic track brake control host will cancel the magnetic track brake activation signal sent to the magnetic track brake device to revoke the magnetic track brake. The magnetic track brake control host is the control host of the magnetic track brake device.

[0040] A magnetic track brake control system and control method provided in this embodiment can also be applied to another scenario, specifically as follows: During cyclic service braking, there is a certain time interval between the application and release of braking. During the braking release process, the braking performance gradually weakens or disappears. During this process, when the rail transit vehicle is on a downhill track, the vehicle speed will be in an increasing process. Before the release is completed, the vehicle speed may exceed the braking speed limit. The automatic braking system of the rail transit vehicle must charge the train pipe to the rated pressure during the braking release process to apply effective braking force again. According to a magnetic track brake control method provided in this embodiment, during the release process, the brake control unit sends a brake release time signal, a speed signal, and a speed limit signal to the magnetic track brake control host. During the brake release time (i.e., before the brake release is completed), when v≥v1 - △v, the magnetic track brake control host will send a magnetic track brake activation signal to the magnetic track brake device to perform magnetic track braking to supplement sufficient braking force to ensure that the braking performance is not lost. When the brake release is completed or v<v1 - △v, the magnetic track brake control host cancels sending the magnetic track brake activation signal to the magnetic track brake device to revoke the magnetic track brake. Wherein, v is the real-time speed of the rail transit vehicle, v1 is the braking speed limit value, △v is the speed difference threshold, the brake release time is provided by the brake release time signal, the real-time speed of the rail transit vehicle is provided by the speed signal, and the braking speed limit value and the speed difference threshold are provided by the speed limit signal.

[0041] The automatic braking system is also called an indirect braking system. When it works, it changes the brake cylinder pressure by changing the train pipe pressure. The brake control unit itself does not generate the speed signal and the speed limit signal, but relevant signals are sent to the brake control unit through the vehicle microcomputer control system and the signal system, and then sent by the brake control unit to the magnetic track brake control host for processing.

[0042] A magnetic track braking control system and method provided by this embodiment can also be applied in another scenario, specifically as follows: During the cyclic service braking process, the temperature of the basic braking device will continue to rise. When the real-time temperature of the basic braking reaches the temperature limit value, the braking performance will decrease, affecting the train operation safety. According to the magnetic track braking control method provided by this embodiment, during the cyclic service braking process, when T≥T1 - △T, the magnetic track braking control host will send the magnetic track braking activation signal to the magnetic track braking device to perform magnetic track braking, supplementing sufficient braking force to ensure that the braking performance is not lost; when T < T1 - △T, the magnetic track braking control host cancels sending the magnetic track braking activation signal to the magnetic track braking device, withdrawing the magnetic track braking. Wherein, T is the real-time temperature of the basic braking of the rail transit vehicle, T1 - △T is the temperature limit value, T1 is the basic braking temperature threshold, and △T is the temperature difference threshold. The real-time temperature T of the basic braking of the rail transit vehicle is collected by a temperature acquisition unit, and the temperature acquisition unit can be components such as a temperature switch or a temperature sensor added to the basic braking device. The temperature acquisition unit collects the real-time temperature of the basic braking device and sends the temperature signal to the magnetic track braking control host for processing. The basic braking device is an execution component of the braking force, such as a brake caliper, a brake disc, and brake pads. In this embodiment, the real-time temperature collected by the temperature acquisition device refers to the real-time temperature of the brake disc and the brake pads.

[0043] With the development of rail transit technology and the application of diversified scenarios, the magnetic track braking control method provided by Embodiment 1 of the present invention can be applied to more scenarios, without being limited by the prior art or the constraints of the scenarios.

[0044] Embodiment 2

[0045] Embodiment 2 of the present invention also provides a magnetic track braking control device, including a memory and one or more processors; one or more programs are stored on the memory, and when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the steps of the control method described in Embodiment 1 above.

[0046] For the magnetic track braking control device provided by this embodiment, since the control program stored in the memory can be called by the processor to implement the steps of any magnetic track braking control method provided in Embodiment 1 above, this device has the same actual effect as the above magnetic track braking control method.

[0047] Embodiment 3

[0048] Embodiment 3 of the present invention further provides a rail transit vehicle, which uses the magnetic rail brake control device provided in Embodiment 2 to supplement the common braking force of the rail transit vehicle. Since the rail transit vehicle is provided with any one of the magnetic rail brake control devices provided in Embodiment 2, the rail transit vehicle has the same practical effect as the magnetic rail brake control method.

[0049] The contents explained in the above embodiments should be understood as these embodiments are only used to more clearly illustrate the present invention, and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the embodiments made by those skilled in the art fall within the scope defined by the claims attached to the present invention.

Claims

1. A magnetic rail brake control system, characterized in that: The control system includes: a magnetic rail brake control host, a magnetic rail brake device and a braking force supplement trigger unit. The magnetic rail brake control host is used to send a magnetic rail brake activation signal to the magnetic rail brake device to perform the magnetic rail brake, or cancel sending the magnetic rail brake activation signal to the magnetic rail brake device to stop the magnetic rail brake. The braking force supplement trigger unit is used to send a trigger signal to the magnetic rail brake control host when the braking force supplement condition is met, or cancel sending the trigger signal to the magnetic rail brake control host when the condition for supplementing the braking force is lifted.

2. The magnetic rail braking control method according to claim 1, characterized in that: The braking force supplement triggering unit is an anti-skid system host or / and a braking control unit or / and a temperature collection unit.

3. A magnetic rail braking control method, the control method is applied to the magnetic rail braking control system as claimed in claim 1 for supplementing the braking force of rail transit vehicles, characterized in that: The control method specifically includes: When the condition for supplementing the braking force is met, the braking force supplement trigger unit sends the trigger signal to the magnetic rail brake control host, and the magnetic rail brake control host sends a magnetic rail brake activation signal to the magnetic rail brake device to perform magnetic rail braking; When the condition for supplementing the braking force is released, the braking force supplement trigger unit cancels sending the trigger signal, the magnetic rail brake control host cancels sending the magnetic rail brake activation signal, and the magnetic rail brake device stops magnetic rail braking.

4. The magnetic rail braking control method according to claim 3, characterized in that: The trigger signal is an anti-skid activation signal, and the conditions for achieving the supplementary braking force specifically include: When the anti-skid system host is in the anti-skid system activation state, the anti-skid activation signal is sent to the magnetic track brake control host, and the magnetic track brake control host receives the anti-skid activation signal after reaching a first time threshold; Accordingly, the conditions for releasing the supplementary braking force specifically include: When the anti-skid system host is in a non-anti-skid system activation state, the anti-skid activation signal will be cancelled after the sending of the anti-skid activation signal is cancelled reaches a second time threshold.

5. The magnetic rail braking control method according to claim 3, characterized in that: The trigger signal is a brake relief time signal, a speed signal and a speed limit signal, and the conditions for achieving the supplementary braking force specifically include: During the braking release time, when v≥v1-△v, Correspondingly, the condition for releasing the supplementary braking force specifically includes: When the brake release time has been reached or v <v1-△v, Among them, v is the real-time speed of the rail transit vehicle, v1 is the braking speed limit value, △v is the speed difference threshold, the braking relief time is provided by the braking relief time signal, the real-time speed of the rail transit vehicle is provided by the speed signal, and the braking speed limit value is provided by the speed limit signal.

6. The magnetic rail braking control method according to claim 3, characterized in that: The trigger signal is a temperature signal. The conditions for achieving the supplementary braking force specifically include: During the cyclic braking process of the common braking of the rail transit vehicle, when T≥T1-△T, Correspondingly, the condition for releasing the supplementary braking force specifically includes: When T <T1-△T, Among them, T is the real-time temperature of the basic brake of the rail transit vehicle, T1 is the basic brake temperature threshold, and △T is the temperature difference threshold.

7. A magnetic rail brake control device, characterized in that: The system includes a memory and one or more processors; one or more programs are stored in the memory, and when the one or more programs are executed by the one or more processors, the one or more processors implement the steps of any one of the methods of claims 3 to 6.

8. A rail transit vehicle, characterized in that: The rail transit vehicle adopts the magnetic rail braking control device as described in claim 7 to supplement the common braking force of the rail transit vehicle.

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