Intelligent switching control method for power source of internal combustion and electric dual-source locomotive, apparatus and medium

Abstract

An intelligent switching control method for power sources of an internal combustion and electric dual-source locomotive, comprising: capturing an image ahead of a traveling locomotive (S1); performing feature extraction on the image to determine marker features (S2); and, on the basis of the marker features, controlling a power supply system to switch a power source so as to supply power to a power grid or a generator driven by an internal combustion engine, such that a traction motor obtains power from the power supply system to drive the locomotive (S3).

Description

Intelligent switching control method, device and medium for dual-power locomotives (internal and external) power sources

[0001] This application claims priority to Chinese Patent Application No. 202411554674.6, filed with the Chinese Patent Office on November 1, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of intelligent locomotive control, such as a method, device, and medium for intelligent switching control of internal and external dual-power locomotive power sources. Background Technology

[0003] Traditional dual-power locomotives employ a dual-engine external coupling system, consisting of a diesel-powered car and an electric-powered car, forming an external coupling control mechanism. For example, in Chinese patent application number 115503766A, "A Power Source Conversion Control Method for Dual-Source Power Centralized EMU," the power source conversion control method includes: collecting two feedback signals from the control terminal and the EMU's operating speed; determining whether a power mode conversion request exists by monitoring whether the two feedback signals from the control terminal change; determining whether the EMU's operating speed is zero if a power mode conversion request exists; when the EMU's operating speed is zero, unconditionally and directly performing a power mode conversion based on the two collected feedback signals; when the EMU's operating speed is not zero, lowering the pantograph or disconnecting the motor control switch according to the power mode before conversion, and then performing a power mode conversion. The traditional dual-engine external coupling method has the following disadvantages:

[0004] 1. Failed to truly integrate internal electric power source;

[0005] 2. The driver needs to manually operate the vehicle to switch power sources according to the route conditions, which requires a high level of driver attention and can easily lead to driver fatigue. Summary of the Invention

[0006] To improve the safety of locomotive operation and reduce driver fatigue, this application proposes an intelligent switching control method for dual power sources (internal combustion and electric) in locomotives. The method includes: capturing an image of the locomotive ahead; extracting features from the image and determining landmark features; and controlling the power supply system to switch between grid power and generator power driven by the internal combustion engine based on the landmark features, so that the traction motor obtains power from the power supply system to traction the locomotive.

[0007] In some embodiments, feature extraction and determination of landmark features of the image include: extracting rectangular box features of objects in the image; calculating the adjacent spatial distance between multiple similar rectangular box features; and determining the multiple similar rectangular box features as landmark features in response to the difference between adjacent spatial distances of multiple similar rectangular box features being less than a first preset threshold, and determining that the locomotive is traveling on an electrified route.

[0008] In some embodiments, feature extraction of the image and determination of landmark features further includes: determining that the locomotive is traveling on a non-electrified route in response to the number of landmark features in the image being less than a second preset threshold.

[0009] In some embodiments, controlling the power supply system to switch between grid power supply and generator power supply driven by an internal combustion engine based on the characteristics of the marker includes: determining the pre-driving route after a preset distance ahead of the locomotive based on the characteristics of the marker; in response to the pre-driving route switching to an electrified route, sequentially controlling the pantograph to rise from a lowered position to connect to the grid, the main circuit breaker to close from an open position to electrically connect the power supply system to the pantograph, the internal combustion engine to stop from starting, and the generator to disconnect from the power supply system; in response to the pre-driving route switching to a non-electrified route, sequentially controlling the internal combustion engine to start from a stopped position, the generator to resume power supply to the power supply system, the pantograph to lower from a raised position to disconnect from the grid, and the main circuit breaker to open from a closed position to disconnect the power supply system from the pantograph.

[0010] In some embodiments, the intelligent switching control method for dual-source locomotive power sources of this application further includes: during the starting and power generation process of the internal combustion engine, controlling the internal combustion engine to accelerate to a first speed and then stimulating the generator; acquiring the high-temperature water temperature of the internal combustion engine in real time, and in response to the high-temperature water temperature being greater than a preset temperature threshold, sequentially controlling the pantograph to be lowered from the raised position to disconnect from the power grid and the main circuit breaker to be opened from the closed position to disconnect the power supply system from the pantograph.

[0011] In some embodiments, the intelligent switching control method for dual-source locomotive power sources of this application further includes: in response to the main disconnection, controlling the internal combustion engine to reduce its speed to a second speed.

[0012] In some embodiments, the intelligent switching control method for dual-source locomotive power sources of this application further includes: controlling the start of the four-quadrant rectifier unit in the power supply system before the internal combustion engine stops, and controlling the gradual increase of the grid power introduced by the pantograph through the four-quadrant rectifier unit; controlling the generator to gradually reduce load, disconnect excitation and stop the internal combustion engine.

[0013] In some embodiments, the intelligent switching control method for internal and external dual-power locomotive power sources of this application further includes the following manual switching process: before determining the characteristics of the marker and preparing to automatically switch the power source, a power mode switching prompt is displayed on the host interface, and the power source switching is automatically controlled after a preset delay, and the control of the host operating handle is locked; in response to the extreme position change of the host operating handle within the preset delay, the automatic switching mode of the power source is exited and switched to the manual switching mode; when the host interface displays a prompt that the power mode switching is successful or after switching to the manual switching mode, the control of the host operating handle is restored.

[0014] In some embodiments, the intelligent switching control method for the dual power sources of the locomotive with internal and external power sources of this application further includes: in response to an automatic switching mode failure, forcibly switching to a manual switching mode via a hardware soft switch; in response to a manual switching mode failure, forcibly activating the function by using a software switch start command on the main control screen to forcibly switch to an automatic switching mode.

[0015] In some embodiments, the manual switching mode further includes controlling a hybrid power supply that simultaneously provides internal combustion engine power and grid power.

[0016] This application also provides an intelligent switching control device for dual-power locomotive systems (internal and external), comprising:

[0017] The image capture module is configured to capture images of the area in front of the locomotive as it travels.

[0018] The feature extraction module is configured to extract features from the image and determine the features of the markers.

[0019] The switching control module is configured to control the power supply system to switch between grid power supply and generator power supply driven by internal combustion engine based on the characteristics of the marker, and to enable the traction motor to obtain power from the power supply system to traction the locomotive.

[0020] This application also provides a computer device, including:

[0021] At least one processor; and

[0022] The memory stores a computer program that can run on the processor, and when the processor executes the program, it implements the intelligent switching control method for the internal and external dual-source locomotive power sources as described in any of the above embodiments.

[0023] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the intelligent switching control method for the internal and external dual-source locomotive power sources as described in any of the above embodiments. Attached Figure Description

[0024] Figure 1 is a flowchart of a method for intelligent switching control of internal and external dual-source locomotive power sources according to an embodiment of this application;

[0025] Figure 2 is a flowchart of the image processing process according to an embodiment of this application;

[0026] Figure 3 is a schematic diagram of the power source switching control logic of an embodiment of this application;

[0027] Figure 4 is a circuit diagram of the power supply system according to an embodiment of this application;

[0028] Figure 5 is a schematic diagram showing the connection relationship between the main control microcomputer system, the vision recognition system, the pantograph system, the main disconnection control system, and the diesel generator set control system in an embodiment of this application.

[0029] Figure 6 is a schematic diagram of the pantograph's state during the power switching process according to an embodiment of this application;

[0030] Figure 7 is a schematic diagram of the structure of an intelligent switching control device for internal and external dual-source locomotive power sources according to an embodiment of this application;

[0031] Figure 8 is a schematic diagram of the structure of a computer device according to an embodiment of this application. Detailed Implementation

[0032] In the embodiments of this application, all uses of the terms "first" and "second" are for the purpose of distinguishing two entities or parameters with the same name but different names. It can be seen that "first" and "second" are only for the convenience of expression.

[0033] To improve locomotive operating safety, this application proposes an intelligent switching control method for dual internal and external power sources in locomotives. Its workflow is shown in Figure 1, including:

[0034] Step S1: Capture an image of the locomotive's path ahead;

[0035] In an optional embodiment, to capture images, the locomotive will be equipped with one or more cameras, such as ordinary cameras and night vision cameras, to capture images of the locomotive moving in front of it. The two types of cameras can work simultaneously, and the processing system automatically selects either type of image data based on image quality. In addition, the two types of cameras can also work at different times, such as ordinary cameras working during the day and night vision cameras working at night, so that the method of this application can be used both day and night.

[0036] In another optional embodiment, the locomotive can be equipped with a lidar system to assist in nighttime driving. The lidar data will be used to assist in filtering image data captured by the night vision camera and to interpolate missing image data. For example, in foggy areas at night, the night vision camera may not be able to capture clear images, and in the subsequent feature extraction process, it may misjudge some landmark features in electrified sections. In this case, if the lidar data contains relevant information, it can be used for filtering or interpolation to supplement the data.

[0037] Step S2: Extract features from the image and determine the features of the markers. The feature extraction in this step can be achieved using conventional image processing methods. The key is the rapid determination of the features of the markers. Therefore, this step will be implemented by taking into account the characteristic of the uniform distribution of markers in the electrical section.

[0038] In an optional embodiment, this application extracts rectangular bounding box features of objects in an image; calculates the adjacent spatial distance between multiple similar rectangular bounding box features; and, in response to the difference between adjacent spatial distances between multiple similar rectangular bounding box features being less than a first preset threshold, determines that the multiple similar rectangular bounding box features are landmark features, and determines that the locomotive is traveling on an electrified route. For example, in this embodiment, the category of rectangular bounding box features can be determined by calculating the aspect ratio of the bounding boxes, and when the difference between the aspect ratios of two rectangular bounding box features is less than a second threshold, they are determined to be similar rectangular bounding box features.

[0039] For example, this embodiment combines image feature recognition with the regularity of landmark appearances in electrified sections to achieve rapid identification of landmark features. Once multiple similar features with similar spatial distances appear, the preceding driving section is determined to be an electrified section. In this embodiment, the spatial distance refers to the actual distance between objects, which needs to be calculated based on the camera's hardware and software parameters. If necessary, a binocular camera or depth camera, which facilitates image ranging, can be used for image capture. The rectangular frame feature is a rectangular frame encompassing the object, formed by its maximum length and width.

[0040] In another optional embodiment, this application will extract features of high-voltage contact wires, high-voltage overhead line poles, and / or high-voltage connection components from the image; and determine whether to enter an electrified railway section by accurately identifying electrification features.

[0041] In one embodiment, the relatively complete image processing process of this application is shown in Figure 2, including: video stream acquisition; data preprocessing for removing unclear images or interpolating missing frames, which can be performed using LiDAR data; feature extraction, which can be performed using conventional image recognition methods to distinguish objects in the image; magnification weights for filtering target objects from numerous image objects; roadbed object identification, and using the prediction rules of this application to determine electrified lines, wherein roadbed objects include, for example, power cables, overhead line poles, tunnels, bridges, and railways; deep learning of the judgment results and updating the magnification weights, which can be performed based on whether manual operation is involved in automatic switching to determine whether the judgment results are accurate.

[0042] In another optional embodiment, in order to achieve faster feature recognition, this embodiment does not perform feature comparison on the features of high-voltage contact network lines, high-voltage overhead line poles and / or high-voltage connection components to accurately determine what the feature object is. Instead, it only defines the range of the feature object by a rectangle and determines whether it is a high-voltage contact network line, high-voltage overhead line pole or high-voltage connection component by the size and shape of the rectangle (such as the aspect ratio). Then, it combines the regularity of the appearance of the identified object to quickly determine whether it is a marker feature.

[0043] In some embodiments, feature extraction of the image and determination of landmark features further includes: determining that the locomotive is traveling on a non-electrified route in response to the number of landmark features in the image being less than a second preset threshold. For example, a decrease in the number of landmark features in the image indicates a problem with the continuity of landmarks, suggesting that the locomotive is about to enter a non-electrified section.

[0044] For example, in this embodiment, the second preset threshold needs to be determined based on the maximum number of markers that can be captured in a normal image. For instance, when the number of markers in the image is only 50% or less of the maximum number of markers in a normal image, it is considered that the non-electrified section is about to be entered. Here, a normal image refers to an image captured in a straight section with good visibility.

[0045] Step S3: Based on the characteristics of the marker, control the power supply system to switch the power supply to the grid or to the generator driven by the internal combustion engine, and enable the traction motor to obtain power from the power supply system to traction the locomotive.

[0046] For example, in dual-source locomotives (internal and electric), traction is achieved by electric motors. In internal combustion engine mode, power is generated by an internal combustion engine generator set to drive the electric motors for traction. A commonly used internal combustion engine generator set is a diesel engine generator set. The advantage of this operating mode is that it allows for power supply from either the power grid or the internal combustion engine generator set individually, or a combination of both to handle varying conditions.

[0047] The method of this application can realize intelligent automatic switching of locomotive power mode, which can reduce the workload of operators, improve the operability of power source switching of locomotive, and greatly improve productivity; and the method of this application can realize power source conversion of locomotive without stopping, and achieve power mode conversion under high traction power performance without affecting the locomotive's driving speed.

[0048] In an optional embodiment, step S3 includes:

[0049] Step S31: Determine the pre-driving route of the locomotive after a preset distance ahead based on the characteristics of the markers;

[0050] The preset distance in front of the locomotive can be adjusted by adjusting the focus position of the camera or the angle of the lidar. The purpose of this step S31 is to reserve sufficient operation time for the power source switching process.

[0051] Step S32: In response to the pre-driving route being switched to an electrified route, the pantograph is sequentially controlled to be raised from lowered to connect to the power grid, the main circuit breaker is switched from open to closed to connect the power supply system to the pantograph, the internal combustion engine is switched from start to stop, and the generator is disconnected from supplying power to the power supply system.

[0052] During the process of switching from power supply by the internal combustion engine generator set to power supply by the power grid, the locomotive's power supply system needs to be connected to the power grid for a short period of grid-connected operation (power supply from the power grid and the internal combustion engine generator set are supplied simultaneously) before the internal combustion engine generator set is stopped. The process of connecting the locomotive's power supply system to the power grid can be roughly divided into two steps: first, the pantograph contacts the power grid to introduce electrical energy into the locomotive, and then the main circuit breaker is closed to truly introduce electrical energy from the power grid into the locomotive's power supply system.

[0053] In an optional embodiment, before the internal combustion engine stops in step S32, the four-quadrant rectifier unit in the power supply system is started, and the grid power introduced by the pantograph is gradually increased through the four-quadrant rectifier unit; the generator is gradually unloaded, the excitation is cut off, and the internal combustion engine is stopped.

[0054] For example, in this embodiment, the process of introducing grid power and the generator load reduction process are carried out simultaneously, and the power shortfall after generator load reduction is supplemented by grid power. This method in this embodiment can ensure the smooth deceleration of the internal combustion engine generator set to achieve safe shutdown.

[0055] Step S33: In response to the pre-driving route switching to a non-electrified route, the internal combustion engine is sequentially controlled to start from a standstill, the generator resumes power supply to the power supply system, the pantograph is raised and lowered to disconnect from the power grid, and the main circuit breaker is closed and opened to disconnect the power supply system from the pantograph.

[0056] During the process of switching from grid power supply to internal combustion engine generator power supply, it is necessary to first start the internal combustion engine generator and briefly connect it to the grid (grid power supply and internal combustion engine generator supply power simultaneously), and then lower the pantograph and disconnect the main circuit breaker. The method of lowering the pantograph first and then disconnecting the main circuit breaker helps to disconnect the main circuit breaker normally and avoids problems such as arcing and burning on the main circuit breaker side.

[0057] In an optional embodiment, step S33 further includes: during the internal combustion engine starting and generating electricity, controlling the internal combustion engine to accelerate to a first speed and then energizing the generator; acquiring the high-temperature water temperature of the internal combustion engine in real time, and in response to the high-temperature water temperature being greater than a preset temperature threshold, sequentially controlling the pantograph to be lowered from the grid and the main circuit breaker to be opened from closed to disconnect the power supply system from the pantograph; in response to the main circuit breaker being opened, controlling the internal combustion engine to decelerate to a second speed.

[0058] In some embodiments, in the dual-power locomotive scenario of this application, the high-temperature water temperature refers to the temperature of the circulating cooling water in the high-temperature cooling circuit of the internal combustion engine, which is a parameter for judging whether the working state of the internal combustion engine is stable.

[0059] For example, in this embodiment, to achieve safe grid connection, the internal combustion engine needs to be accelerated to a first speed to adapt to the grid frequency, and then reduced to a second speed for long-term operation. The high-temperature water temperature is used to determine whether the internal combustion engine's operating state is stable, and the grid power supply is cut off only after the internal combustion engine has stabilized.

[0060] Please refer to Figure 3, which illustrates the complete control logic for automatically switching power sources according to this application, including:

[0061] Image recognition identifies the section ahead as an electrified railway section; power source switching is performed, controlling the pantograph to rise, the main circuit breaker to close, the diesel engine to stop, and the generator to disconnect; confirming operation in electric traction mode; image recognition determines the section ahead has switched to a non-electrified railway section; power source switching is performed, controlling the pantograph to lower, the main circuit breaker to open, the diesel engine to start, and the generator to generate electricity; confirming operation in diesel traction mode; if power source switching is not required, the operating state remains unchanged; this cycle repeats.

[0062] In some embodiments, the above-mentioned intelligent power source switching process can also be linked with manual operation. The manual operation process and the linkage process include: Step 100: Before determining the characteristics of the marker and preparing to automatically switch the power source, a power mode switching prompt is displayed on the host interface, and the power source is automatically switched after a preset delay, and the control of the host operating handle is locked; Step 200: In response to the extreme position change of the host operating handle within the preset delay, the automatic power source switching mode is exited and the manual switching mode is switched; Step 300: When the host interface displays a prompt that the power mode switching is successful or the manual switching mode is switched, the control of the host operating handle is restored.

[0063] For example, consider a locomotive in the state of diesel engine starting and excitation engaged:

[0064] ① When the main control handle is in the extreme position "0", the dual power mode is allowed to operate. Raise the pantograph and close the main circuit breaker (i.e., automatically switch to grid power supply). At this time, the four-quadrant rectifier unit starts to work and gradually takes over the power supply. The main control microcomputer display screen prompts the driver to "automatically switch to power mode".

[0065] ②When the main unit operating handle returns to zero, the generator will automatically reduce load and disconnect the excitation, and the diesel engine will stop. The rear lubrication will then start automatically.

[0066] ③ After confirming that it is in power mode, the main control microcomputer system exits the automatic mode and then uses pure power according to the position of the host control handle;

[0067] ④ If the excitation is not cut off and the diesel engine is stopped, and the power source is forcibly switched non-automatically by using the main engine operating handle, such as turning the power switch to the power position, the excitation will be cut off and the engine will be stopped. The main engine and pantograph will remain in their current state, and the locomotive traction will be blocked until the system recognizes the traction handle returning to zero for confirmation.

[0068] In an optional embodiment, in the internal combustion generator set power supply mode, the main engine operating handle is used to control the internal combustion engine speed and thus control the generator output power. In this case, the output intermediate DC voltage can be controlled by controlling the excitation current. An exemplary table showing the main engine operating handle positions, diesel engine speed, and main generator power voltage correspondence is as follows:

[0069] Table of Main Engine Control Handle Gear, Diesel Engine Speed, and Main Engine Power Voltage

[0070]

[0071] In some embodiments, to avoid failures in the automatic or manual power source switching process, the method of this application further includes: in response to an automatic switching mode failure, forcibly switching to a manual switching mode via a hardware soft switch; in response to a manual switching mode failure, forcibly activating the function via a software switch start command on the main control screen to forcibly switch to an automatic switching mode.

[0072] For example, the power mode switching conditions of this application include: only the control terminal (i.e., the main control microcomputer) can perform mode switching. When the locomotive has no operational faults, the main control microcomputer triggers and maintains a valid active state according to the power mode requirements. After the mode recognition is valid, the main control display unit will pop up a message "Power mode switching in progress" for 3 seconds, after which the pop-up message disappears, locking the control of the main control handle and waiting for the mode switching to complete. If the driver manually changes the extreme position of the handle within 3 seconds, the automatic switching will be exited. When the new power mode switching is successful, the driver can re-operate the driver's controller handle to control the locomotive in the traction zone or electric braking zone.

[0073] In case of a fault in the internal power mode selection, the hardware soft switch can be manually selected to switch the mode. If the manual hardware switch fails, the main control display unit power mode software switch can be selected to force the activation of the command function. These functions are as follows:

[0074] 1) Set the "Internal Power Mode Command Force" interface in the device control interface of the display screen;

[0075] 2) The interface includes: forced activation and deactivation of the internal power mode software switch. After activation, you can select the internal power mode, including electric mode, internal combustion mode, and hybrid mode;

[0076] 3) After selecting a new location, a pop-up will appear prompting you to confirm the selection. The pop-up includes two buttons: "Confirm" and "Cancel". After activation, the display should show the message "Internal power mode has been forced via the display".

[0077] 4) The forced function of the display screen takes precedence over the operation function of the changeover switch, and is not limited by whether the changeover switch is malfunctioning;

[0078] 5) This function is only valid when set in the main control vehicle;

[0079] 6) It is recommended to select this function when there is a hardware failure in the manual switch or an automatic switching function failure.

[0080] Through the above implementation methods, this application achieves redundancy in the power source switching process between manual and automatic operations, thereby better ensuring the safety of locomotive operation.

[0081] In some embodiments, the manual switching mode of this application further includes controlling a hybrid power supply that simultaneously provides internal combustion engine power and grid power. For example, this embodiment can be controlled by adjusting the extreme positions of the control handle on the main unit.

[0082] Please refer to Figure 4, which shows the circuit structure of the power supply system of this application. The integrated locomotive traction system of this application, with both internal and external power sources, adopts a main-auxiliary integrated structure, where traction, auxiliary, and train power supply share a common intermediate DC link. The rectifier unit includes two types: a four-quadrant electric rectifier unit and an internal combustion diode uncontrolled rectifier. It can supply power solely to electric power, solely to internal combustion power, or via hybrid power.

[0083] For example, in electric mode, contactors K1-K3 (i.e., the main disconnect) are closed, the CV1-CV3 four-quadrant rectifier unit is in operation, and contactor K4 (internal combustion generator set power supply control switch) is open; in internal combustion power supply mode, contactors K1-K3 are open, contactor K4 is closed, and the CV4 excitation control unit is in operation; in hybrid mode, contactors K1-K4 are closed, and both the CV1-CV3 four-quadrant rectifier unit and the CV4 excitation control unit are in operation. The power supply system of this application realizes integrated control of internal and electric power sources, which helps to achieve intelligent operation and hybrid power output.

[0084] Please refer to Figure 5, which illustrates the communication and control relationship between the main control microcomputer system of this application and the vision recognition system, the pantograph system, the main disconnection control system (included in the power supply system), and the diesel generator set system. The main control microcomputer system communicates with the vision recognition system, the pantograph system, and the diesel generator set system respectively to send control commands to each system, thereby realizing control integration.

[0085] Please refer to Figure 6, which shows a schematic diagram of the pantograph's status during power switching according to this application. In electrified sections, the pantograph is in the raised state, and in non-electrified sections, the pantograph is in the lowered state.

[0086] As shown in Figure 7, an embodiment of this application also provides an intelligent switching control device 700 for dual-power locomotive systems (internal and external), which includes an image capture module 710, a feature extraction module 720, and a switching control module 730.

[0087] Image capture module 710 is configured to capture images of the locomotive in front of it.

[0088] Feature extraction module 720 is configured to extract features from the image and determine marker features;

[0089] The switching control module 730 is configured to control the power supply system to switch between grid power supply and generator power supply driven by internal combustion engine based on the characteristics of the marker, and to enable the traction motor to obtain power from the power supply system to traction the locomotive.

[0090] As shown in Figure 8, an embodiment of this application also provides a computer device 801, including:

[0091] At least one processor 820; and

[0092] The memory 810 stores a computer program 811 that can run on the processor. When the processor 820 executes the computer program 811, it implements the intelligent switching control method for the internal and external dual-source locomotive power sources as described in any of the above embodiments.

[0093] Embodiments of this application also provide a computer-readable storage medium storing computer program instructions, which, when executed by a processor, implement the intelligent switching control method for the internal and external dual-source locomotive power sources as described in any of the above embodiments.

[0094] The above are exemplary embodiments disclosed in this application. The functions, steps, and / or actions of the methods according to the disclosed embodiments described herein do not need to be performed in any particular order. Furthermore, although the elements disclosed in the embodiments of this application may be described or claimed individually, they may be understood as multiple unless explicitly limited to a singular number.

[0095] As used herein, unless the context clearly supports an exception, the singular form “a” is intended to include the plural form as well. It should also be understood that, as used herein, “and / or” refers to any and all possible combinations of one or more of the associated listed items.

[0096] The example numbers disclosed in the above application are for descriptive purposes only and do not represent the superiority or inferiority of the examples.

Claims

1. A method for intelligent switching control of internal and external dual-power locomotive power sources, comprising: Capture images of the area in front of the locomotive; Feature extraction is performed on the image, and marker features are determined; Based on the characteristics of the marker, the power supply system is controlled to switch between grid power and generator power driven by the internal combustion engine, so that the traction motor obtains power from the power supply system to traction the locomotive.

2. The intelligent switching control method for internal and external dual-source locomotive power sources according to claim 1, wherein, The image is subjected to feature extraction and marker feature determination, including: Extract the bounding box features of objects in the image; Calculate the adjacent spatial distance between multiple similar rectangular bounding box features; In response to the fact that the difference in adjacent spatial distances between multiple similar rectangular frame features is less than a first preset threshold, the multiple similar rectangular frame features are determined to be landmark features, and the locomotive is determined to be traveling on an electrified route.

3. The intelligent switching control method for internal and external dual-source locomotive power sources according to claim 2, wherein, The process of extracting features from the image and determining marker features also includes: If the number of landmark features in the image is less than a second preset threshold, it is determined that the locomotive is traveling on a non-electrified route.

4. The intelligent switching control method for internal and external dual-source locomotive power sources according to claim 3, wherein, Based on the characteristics of the marker, the power supply system is controlled to switch between grid power and generator power, including: Based on the characteristics of the markers, determine the pre-driving route of the locomotive after traveling a preset distance ahead; In response to the pre-driving route being switched to an electrified route, the pantograph is sequentially controlled to be raised from a lowered position to connect to the power grid, the main circuit is switched from open to closed to allow the power supply system to be electrically connected to the pantograph, the internal combustion engine is switched from starting to stopping, and the generator is disconnected from supplying power to the power supply system. In response to the pre-driving route switching to a non-electrified route, the internal combustion engine is sequentially controlled to start from a standstill, the generator resumes power supply to the power supply system, the pantograph is raised and lowered to disconnect from the power grid, and the main circuit breaker is closed and opened to disconnect the power supply system from the pantograph.

5. The intelligent switching control method for dual-power locomotive systems (internal and external) according to claim 4, further comprising: During the process of starting the internal combustion engine to generate electricity, the internal combustion engine is controlled to accelerate to a first speed and then the generator is excited. The high-temperature water temperature of the internal combustion engine is acquired in real time, and in response to the high-temperature water temperature being greater than a preset temperature threshold, the pantograph is sequentially controlled to change from raising to lowering to disconnect from the power grid, and the main circuit is changed from closing to opening to disconnect the power supply system from the pantograph.

6. The intelligent switching control method for dual-power locomotive systems (internal and external) according to claim 5, further comprising: In response to the main disconnection, the internal combustion engine is controlled to reduce its speed to the second speed.

7. The intelligent switching control method for internal and external dual-source locomotive power sources according to claim 5, the method further includes: Before the internal combustion engine stops, the four-quadrant rectifier unit in the power supply system is started, and the power grid power introduced by the pantograph is gradually increased through the four-quadrant rectifier unit. The generator is controlled to gradually reduce load, disconnect excitation, and stop the internal combustion engine.

8. The intelligent switching control method for dual-power locomotives with internal and external electric power sources according to any one of claims 1-7, further comprising the following manual switching process: Before identifying the characteristics of the marker and preparing to automatically switch the power source, a power mode switching prompt is displayed on the main unit interface. After a preset delay, the power source is automatically switched, and control of the main unit operating handle is locked. In response to the extreme position change of the host operating handle within the preset delay, the automatic power source switching mode is exited and the manual switching mode is switched. Once the host interface displays a message indicating that the power mode switch was successful or the system has switched to manual mode, control of the host control handle is restored.

9. The intelligent switching control method for dual-power locomotive systems (internal and external) according to claim 8, further comprising: In response to an automatic switching mode failure, the system will force a switch to manual switching mode via a hardware soft switch. In response to a manual switching mode failure, the function is forcibly switched to automatic switching mode by starting the software switch on the main control screen.

10. The intelligent switching control method for internal and external dual-source locomotive power sources according to claim 8, wherein, The manual switching mode also includes: Control the hybrid power supply that simultaneously provides power from internal combustion engines and from the power grid.

11. A smart switching control device for dual-power locomotive systems (internal and external), comprising: The image capture module is configured to capture images of the area in front of the locomotive as it travels. The feature extraction module is configured to extract features from the image and determine the features of the markers. The switching control module is configured to control the power supply system to switch between grid power supply and generator power supply driven by internal combustion engine based on the characteristics of the marker, and to enable the traction motor to obtain power from the power supply system to traction the locomotive.

12. A computer device, comprising: At least one processor; as well as A memory storing a computer program that can run on the processor, wherein the processor executes the program to implement the intelligent switching control method for the dual power sources of an internal and external locomotive as described in any one of claims 1-10.

13. A computer-readable storage medium storing a computer program that, when executed by a processor, implements the intelligent switching control method for dual-power locomotive power sources (internal and external) as described in any one of claims 1-10.

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