Automatic end-changing method for multi-source locomotive

Abstract

A method for automatically changing ends for a multi-source locomotive includes: S1, determining whether the electric key has exited occupation; if the electric key has not exited occupation, the automatic end change is not activated; if the electric key has exited occupation, the parking brake is applied; S2, determining whether the main power supply is closed before the electric key exits occupation; if the main power supply is not closed, the automatic end change is not activated; if the main power supply is closed, the current power supply mode is maintained; S3, after occupying the new occupied end, determining whether the power supply mode of the new occupied end is consistent with the power supply mode before the end change; if the power supply modes are consistent, the automatic end change is activated; if the power supply modes are inconsistent, a traction blockade is applied. Compared with the prior art, the present invention avoids the operational restriction of needing to convert the power supply mode before activating the automatic end change, avoids the risk of power supply mode conflict caused by locomotive movement, simplifies the automatic end change process, and thus realizes efficient and convenient automatic end change without interrupting the power supply of the automatic end change.

Description

Technical Field

[0001] The present invention relates to the field of rail transportation technology, and in particular to an automatic end-changing method for a multi-source locomotive. Background Art

[0002] Compared to traditional electric or diesel locomotives, multi-source locomotives support multiple power supply modes, such as catenary, diesel, and battery. To facilitate the driver's quick selection of the appropriate power supply mode, multi-source locomotives are generally equipped with a power supply mode switch at each driver's end. The driver can use the power supply mode switch at the driver's end to select the power supply mode that suits the actual situation.

[0003] Since the locomotive power supply mode often needs to be switched during locomotive operation, it is difficult to ensure that the power supply mode switches of the cabs at both ends are consistent. Therefore, existing multi-source locomotives generally do not support automatic end switching, or only support automatic end switching when the power supply modes of the cabs at both ends are consistent. The reason is: if the end is automatically switched when the power supply modes of the cabs at both ends are inconsistent, it will cause the power supply mode switch to select conflict protection, resulting in interruption of the locomotive main power supply, and the requirement of uninterrupted power supply for automatic end switching cannot be achieved. If the power supply is to be uninterrupted during automatic end switching, the driver must first run to the non-occupied end to confirm the power supply mode switch, and make it consistent with the power supply mode switch at the occupied end, and then return to the occupied cab to activate automatic end switching. The operation is very cumbersome. Summary of the Invention

[0004] The present application provides an automatic end-changing method for a multi-source locomotive to solve the problem that existing multi-source locomotives cannot perform efficient and convenient automatic end-changing without interrupting the power supply for automatic end-changing.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions.

[0006] A method for automatically changing ends of a multi-source locomotive comprises the following steps:

[0007] S1. Determine whether the electric key is unlocked. If the electric key is unlocked, the automatic end change is not activated and the locomotive continues to operate normally. If the electric key is unlocked, the parking brake is applied and the next step is entered.

[0008] S2. Determine whether the main power supply is on before the electric key is released. If the main power supply is not on, do not activate the automatic terminal change. If the main power supply is on, maintain the current power supply mode and proceed to the next step.

[0009] S3. After occupying the new occupied end, determine whether the power supply mode of the new occupied end is consistent with the power supply mode before the end change; if the power supply modes are consistent, activate automatic end change; if the power supply modes are inconsistent, apply traction blockade.

[0010] In some embodiments, between steps S2 and S3 there is also included a step of prompting the driver to occupy the new occupied end within a first preset time period through graphic display and / or voice.

[0011] In some embodiments, if the driver has occupied the new occupied end within the first preset time, step S3 is entered; if the driver has not occupied the new occupied end within the first preset time, the main power supply of the locomotive is disconnected.

[0012] In some embodiments, whether the new occupied terminal is occupied is determined by determining whether the electric key corresponding to the new occupied terminal is occupied.

[0013] In some embodiments, after applying the traction blockade, the method further includes prompting the driver to switch the power supply mode within a second preset time period through graphic display and / or voice.

[0014] In some embodiments, if the driver has converted the power supply mode of the newly occupied end to the same power supply mode before the end change within a second preset time period, the traction blockade is released and the automatic end change is activated; if the driver has not converted the power supply mode of the newly occupied end to the same power supply mode before the end change within the second preset time period, the locomotive main power supply is disconnected.

[0015] This application has at least the following technical effects or advantages:

[0016] 1. When the power supply modes of the two occupied ends of the locomotive are inconsistent, the conflict between the power supply mode of the new occupied end and the actual power supply mode is ignored, and the original power supply mode is maintained to continue running, avoiding the driver's need to switch the power supply mode before activating the operation restriction of automatic end change.

[0017] 2. The risk of power supply mode conflict caused by locomotive movement is avoided by limiting traction blocking during power supply mode conflict.

[0018] 3. Combined with the conditions of electric key exit and main power closure before exit, it is comprehensively judged whether the driver needs to activate automatic end change, which simplifies the automatic end change process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the flow of the automatic end-changing method for a multi-source locomotive in one embodiment of the present application. DETAILED DESCRIPTION

[0020] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0021] See also Figure 1 , a method for automatically changing ends of a multi-source locomotive, comprising the following steps:

[0022] S1. Determine whether the electric key is unlocked. If the electric key is unlocked, the automatic end change is not activated and the locomotive continues to operate normally. If the electric key is unlocked, the parking brake is applied to prevent the locomotive from slipping, and the next step is entered.

[0023] S2. Determine whether the main power supply is closed before the electric key is exited. If the main power supply is not closed, the automatic terminal change is not activated (normal key exit); if the main power supply is closed, the current power supply mode is maintained and the next step is entered;

[0024] S3. Prompting the driver to occupy the new occupied terminal within a first preset time period through a graphic display and / or voice; if the driver does not occupy the new occupied terminal within the first preset time period, disconnecting the main power supply of the locomotive; if the driver has occupied the new occupied terminal within the first preset time period, proceeding to the next step;

[0025] Specifically, a countdown and text and voice prompts can be displayed on a display in the driver's cab of the occupied terminal to remind the driver to occupy the new occupied terminal before the countdown ends. It should be noted that whether the new occupied terminal is occupied can be determined by determining whether the electric key corresponding to the new occupied terminal is occupied.

[0026] S4. After occupying the new occupied end (i.e., occupying the electric key corresponding to the new occupied end), determine whether the power supply mode of the new occupied end is consistent with the power supply mode before the end change; if the power supply modes are consistent, activate automatic end change; if the power supply modes are inconsistent, impose a traction blockade, and prompt the driver to change the power supply mode within a second preset time period through graphic display and / or voice; if the driver has converted the power supply mode of the new occupied end to be consistent with the power supply mode before the end change within the second preset time period, release the traction blockade and activate automatic end change; if the driver has not converted the power supply mode of the new occupied end to be consistent with the power supply mode before the end change within the second preset time period, disconnect the locomotive main power supply.

[0027] Specifically, a countdown as well as text and voice prompts can be displayed on a display in the driver's cab at the occupied end to remind the driver to switch the power supply mode before the countdown ends.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A method for automatically changing ends of a multi-source locomotive, comprising the following steps: S1. Determine whether the electric key is unlocked. If the electric key is unlocked, the automatic end change is not activated and the locomotive continues to operate normally. If the electric key is unlocked, the parking brake is applied and the next step is entered. S2. Determine whether the main power supply is on before the electric key is released. If the main power supply is not on, do not activate the automatic terminal change. If the main power supply is on, maintain the current power supply mode and proceed to the next step; S3. After occupying the new occupied end, determine whether the power supply mode of the new occupied end is consistent with the power supply mode before the end is changed; If the power supply modes are consistent, the automatic end change is activated; if the power supply modes are inconsistent, the traction blockade is applied; S4. After the traction blockade is applied, the driver is prompted to switch the power supply mode within the second preset time period through graphic display and / or voice; if the driver has switched the power supply mode of the new occupied end to the same power supply mode before the end switch within the second preset time period, the traction blockade is lifted and the automatic end switch is activated; if the driver has not switched the power supply mode of the new occupied end to the same power supply mode before the end switch within the second preset time period, the main power supply of the locomotive is disconnected.

2. The automatic end-changing method for a multi-source locomotive according to claim 1, characterized in that: Between steps S2 and S3 there is also included a step of prompting the driver to occupy the new occupied end within a first preset time period by means of graphic display and / or voice.

3. The automatic end-changing method for a multi-source locomotive according to claim 2, characterized in that: If the driver has occupied the new occupied end within the first preset time, the process proceeds to step S3; if the driver has not occupied the new occupied end within the first preset time, the main power supply of the locomotive is disconnected.

4. The automatic end-changing method for a multi-source locomotive according to any one of claims 1 to 3, characterized in that: Whether the new occupied terminal is occupied is determined by judging whether the electric key corresponding to the new occupied terminal is occupied.

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