CN116030681A - Electric locomotive overhauls training system based on VR - Google Patents

Abstract

The invention discloses a VR-based electric locomotive maintenance training system, including a VR system, a computer system, a mobile phone terminal, a test module and an expert database system, the VR system and the mobile phone terminal are respectively connected with the computer system, and the computer system is also connected with the test module and the expert system The VR system includes a VR head display, a VR handle and a positioning device, and the VR head display, a VR handle and a positioning device are electrically connected to each other; a learning system is installed on the computer system, and the learning system includes a modeling system, a teaching system, a practice system and an examination system, test modules include non-catenary power supply static test module, catenary power supply static test module and line dynamic test module, teaching system, practice system and examination system The power supply static test module, the line dynamic test module and the expert database system are electrically connected.

Description

VR-based electric locomotive maintenance training system

technical field

The invention belongs to the technical field of comprehensive training for electric locomotive maintenance, and in particular relates to a VR-based electric locomotive maintenance training system.

Background technique

As an important part of rail transit, electric locomotives have experienced leaps and bounds in their operating speed and traction tonnage. As a result, the rail transit industry has put forward higher requirements for the inspection and maintenance of electric locomotives. The maintenance process of electric locomotives is complex, with various process standards, traditional theoretical training methods are not intuitive enough, and the training time and cost are too long, so it is difficult to produce ideal training results. Especially when trainees carry out study assignments, there are not enough existing relevant electric locomotives as study objects. At the same time, the structure of electric locomotives of different models and brands is quite different. Therefore, it is of great significance to have a comprehensive understanding of electric locomotives in the training of electric locomotives. At the same time, the traditional VR-based electric locomotive system has a complex structure and a low degree of simulation. It cannot take advantage of the immersive learning scenario, and at the same time, due to the delay of the network, the learning effect is not good, and the degree of simulation of students' learning is not high.

Contents of the invention

The purpose of the present invention is to solve the above problems, provide a VR-based electric locomotive overhaul that can reduce training costs, reduce training time, promote digitalization of electric locomotive training, use immersive learning scenarios, stimulate students' interest in learning, and deepen learning impressions training system.

In order to solve the above technical problems, the technical solution of the present invention is: a VR-based electric locomotive maintenance training system, including a VR system, a computer system, a mobile phone terminal, a test module and an expert library system, the VR system and the mobile phone terminal are respectively connected to the computer system, The computer system is also connected with the test module and the expert system. The VR system includes a VR head display, a VR handle and a positioning device, and the VR head display, VR handle and positioning device are electrically connected to each other; a learning system is installed on the computer system, and the learning system includes modeling system, teaching system, practice system and examination system, the test modules include non-catenary power supply static test module, catenary power supply static test module and line dynamic test module, teaching system, practice system and test system are all related to non-catenary The power supply static test module, the catenary power supply static test module, the line dynamic test module and the expert database system are electrically connected; the modeling system is used to construct the equal-proportion restored parts of the electric locomotive to be inspected and the virtual space of the surrounding environment , the teaching system is used to teach the maintenance process of electric locomotives under different conditions. The practice system is used for students to practice the maintenance process of electric locomotives after learning through the teaching system. The examination system is used for students to take the examination of the maintenance process of electric locomotives. It scores and displays and saves according to the operation time and correct rate of the students. At the same time, the test system will save screenshots for the wrong operations and process errors of the students during the test; the mobile terminal is used to receive the test scores and test error screenshots of the students. The catenary power supply static test module is used for the realization of the teaching mode, practice mode and examination mode of the electric locomotive in the corresponding virtual space without catenary power supply; the catenary power supply static test module is used for the corresponding Realization of the teaching mode, practice mode and examination mode of the electric locomotive placed in the state of catenary power supply in the virtual space; the line dynamic test module is used for the electric locomotive placed in the line dynamic test state in the corresponding virtual space The realization of teaching mode, practice mode and examination mode; the expert database system is used to judge the needs in the electric locomotive maintenance process according to expert experience, and the teaching mode, practice mode and examination mode of the process flow that have not been given a clear standard in the outline Realization; students choose to enter the learning system through the VR handle, the VR head display displays the virtual space where the corresponding learning module is located where the students are located, and the positioning device is used to obtain the actions of the students in the virtual space.

Preferably, the modeling system includes modeling of specific components of the electric locomotive, modeling of the state of the electric locomotive and modeling of maintenance equipment. Carry out modeling, the state modeling of electric locomotive completes the switching of electric locomotive under different maintenance states by adjusting the state of the modeled parts, and the maintenance equipment modeling includes modeling the maintenance equipment of electric locomotive and establishing the information database of equipment.

Preferably, the teaching system includes the demonstration of the correct standard process flow corresponding to the state of the electric locomotive without catenary power supply, the state of catenary power supply and the state of line dynamic test in the virtual space, the process The procedures are all in line with the routine test program for electric locomotives, and a corresponding expert database system has been established to solve the procedures that have not been given clear indicators in the test program and require expert judgment.

Preferably, the non-catenary power supply static test module can place the electric locomotive corresponding to the virtual space in the state of non-catenary power supply, and conduct random simulations of the faults and abnormalities of the electric locomotive in its state, and the non-catenary power supply static The static test module also includes the corresponding standard process flow for the non-catenary power supply static test of the electric locomotive.

Preferably, the static test module with catenary power supply can place the electric locomotive corresponding to the virtual space in the state of catenary power supply, and simulate the faults and abnormalities of the electric locomotive in its state, and put the electric locomotive in a static state with catenary power supply The test module also includes the corresponding standard process flow for the static test of the electric locomotive with catenary power supply.

Preferably, the line dynamic test module can place the electric locomotive corresponding to the virtual space in the corresponding state of line dynamic test, and perform random simulation of the faults and abnormalities of the electric locomotive in its state, and the line dynamic test module also includes The corresponding standard process flow when the electric locomotive performs the line dynamic test module.

Preferably, the expert library system includes technical processes that need to be judged according to expert experience in the electric locomotive maintenance process, and no clear standards have been given in the outline.

Preferably, the exercise system can place the electric locomotive in the virtual space in a random state to be overhauled and randomly simulate the failure or abnormality of the electric locomotive, and when the trainee makes a wrong operation or process error during the practice, the trainee will be prompted through the screen to stop. One step correct process.

Preferably, the examination system includes placing the electric locomotive in a virtual space in a random state to be overhauled and randomly simulating the failure or abnormality of the electric locomotive, and scoring and displaying the correct rate and duration of the overhaul procedure of the trainees.

Preferably, the positioning device includes a gravity sensor, a gyroscope and a laser position sensor, and the gravity sensor, the gyroscope and the laser position sensor are respectively electrically connected to the computer system.

The beneficial effects of the present invention are: the VR-based electric locomotive maintenance training system provided by the present invention constructs the specific component models of the electric locomotive, the switching of different states of the electric locomotive, and the maintenance equipment model in equal proportions, and the training module can conduct training for different states. The electric locomotive under maintenance is trained, and immersive training is conducted based on VR technology, which reduces the training cost, shortens the training time, and improves the training quality. Trainees can learn the correct maintenance process through the teaching system, and can also perform specific process operations in the practice system. When a wrong operation or process error occurs, the screen will prompt the correct process for the next step, so that they can realize their mistakes. At the same time, learn the correct process in time, impress the students and stimulate learning motivation. After the practice is over, the students can choose to enter the examination system to take the examination. During the examination, when the students make a wrong operation or process error, the examination system will save the screenshots. Score and time and send the score and test screenshots to the mobile terminal, which is convenient for students to view, so that students can review in time and master knowledge as soon as possible.

Description of drawings

Fig. 1 is a schematic diagram of the VR-based electric locomotive maintenance training system of the present invention.

Description of reference signs: 1. Learning system; 2. Computer system; 3. Mobile terminal; 4. VR system; 11. Modeling system; 12. Teaching system; 13. Practice system; 14. Examination system; 41. VR head 42. VR handle; 43. Positioning device; 111. Stationary test module without catenary power supply; 112. Stationary test module with catenary power supply; 113. Line dynamic test module; 114. Test module and expert database system.

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

As shown in Figure 1, the electric locomotive maintenance training system based on VR provided by the present invention includes VR system 4, computer system 2, mobile phone terminal 3, test module and expert database system 114, and VR system 4 and mobile phone terminal 3 are connected with computer respectively The system 2 is connected, and the computer system 2 is also connected with the test module and the expert system 114. The VR system 4 includes a VR head display 41, a VR handle 42 and a positioning device 43, and the VR head display 41, the VR handle 42 and the positioning device 43 are electrically connected to each other; Learning system 1 is installed on computer system 2, and learning system 1 comprises modeling system 11, teaching system 12, exercise system 13 and examination system 14, and test module comprises non-catenary power supply static test module 111, has catenary power supply static test module 111, and catenary power supply is static. The test module 112 and the line dynamic test module 113, the teaching system 12, the practice system 13 and the examination system 14 are all related to the non-catenary power supply static test module 111, the catenary power supply static test module 112, the line dynamic test module 113 and experts. The library system 114 is electrically connected. The modeling system 11 is used to construct the parts to be inspected of the electric locomotive restored in equal proportions and the virtual space of the surrounding environment. The teaching system 12 is used to teach the maintenance process of the electric locomotive under different states. The practice system 13 is used for the trainees to pass After the study of the teaching system, the electric locomotive maintenance process practice is carried out by oneself. The examination system 14 is used for the students to carry out the examination of the electric locomotive maintenance process. It is scored and displayed according to the operation time and correct rate of the students. The test system 14 will save screenshots of incorrect operations and process errors. The mobile phone terminal 3 is used to receive screenshots of students' test scores and test errors, and the non-catenary power supply static test module 111 is used for the teaching mode, practice mode and examination of electric locomotives placed in the state of non-catenary power supply in the corresponding virtual space. Implementation of the pattern. The resting test module 112 with catenary power supply is used for realizing the teaching mode, practice mode and examination mode for the electric locomotives placed in the state of catenary power supply in the corresponding virtual space. The line dynamic test module 113 is used to realize the teaching mode, practice mode and examination mode for the electric locomotive placed in the line dynamic test state in the corresponding virtual space. The expert library system 114 is used to realize the teaching mode, practice mode, and examination mode of the technical process that has not been given a clear standard in the syllabus according to the judgment of expert experience for the needs in the electric locomotive maintenance process. The student chooses to enter the learning system 1 through the VR handle 42, the VR head-mounted display 41 displays the virtual space where the corresponding learning module is located where the student is located, and the positioning device 43 is used to acquire the student's actions in the virtual space.

In this embodiment, both the VR head-mounted display 41 and the VR handle are existing mature VR technology equipment.

The modeling system 11 includes modeling the specific components of the electric locomotive, modeling the state of the electric locomotive and modeling the maintenance equipment. The modeling of the specific components of the electric locomotive includes modeling the shape of the electric locomotive, the traction system of the electric locomotive, and the braking system of the electric locomotive. Electric locomotive state modeling completes the switching of electric locomotives under different maintenance states by adjusting the state of the modeled components. Maintenance equipment modeling includes modeling the maintenance equipment of electric locomotives and establishing equipment information databases.

In this embodiment, the process of modeling the specific parts of the electric locomotive is as follows: first draw the part diagram of each part in SolidWorks, and then import the model into Unity3d to cooperate with making a virtual scene.

The teaching system 12 includes the demonstration of the correct standard process flow corresponding to the state of the electric locomotive without catenary power supply, the state of catenary power supply and the state of line dynamic test in the virtual space. The locomotive routine test outline, and for the procedures that have not given clear indicators in the test outline and require expert judgment, a corresponding expert database system 114 has been established to solve the problem.

The non-catenary power supply static test module 111 can place the electric locomotive corresponding to the virtual space in the state of non-catenary power supply, and conduct random simulations of the faults and abnormalities of the electric locomotive in its state. The non-catenary power supply static test module 111 It also includes the corresponding standard process flow for the static test of the electric locomotive without catenary power supply.

In this embodiment, the non-catenary power supply static test module 11 includes an external dimension and a limit test module, a weighing test module, a calibration module, an insulation test module, a grounding and return circuit inspection module, an animal battery and a control power supply test module. module. The specific implementation steps are the modeling process. First draw the part diagram of each part in SolidWorks, then import the model into Unity3d to cooperate with the production of virtual scenes, and debug in Unity3d and set the failure rate of the corresponding test.

The standard process flow includes the following steps:

S1, factory inspection; the factory inspection is to find out whether there is a fault.

S2. Dismantling; the dismantling process is to disassemble the components to be overhauled.

S3. Process detection; process detection is to judge the fault type and determine the maintenance method.

S4. Replenishment of materials in the workshop: supplementing materials for maintenance of the workshop.

S5. Component assembly; assembling the overhauled components.

S6. Factory inspection; after assembly, quality inspection is carried out before leaving the factory.

The static test module 112 with catenary power supply can place the electric locomotive corresponding to the virtual space in the state of catenary power supply, and simulate the faults and abnormalities of the electric locomotive in its state. The static test module 112 with catenary power supply also It includes the corresponding standard process flow for the static test of electric locomotives with catenary power supply.

The static test module 112 with catenary power supply can carry out the first step-up voltage test, main converter resonant circuit test, auxiliary power supply and auxiliary machine test. In this embodiment, the resting test module 112 with catenary power supply includes the following four parts: model construction, environment construction, logic processing, and animation production.

Model construction: draw the parts to be tested in SolidWorks according to the relevant dimensions, and assemble them to complete the hardware foundation for the static test with catenary power supply.

Environment construction: After the 3D modeling in SolidWorks is completed, it is necessary to import the model into Unity3d to cooperate with the production of virtual scenes. First, according to the real model situation, carry out structural processing on the relevant parts in Unity3d, and strictly define the space between parts. The parent-child relationship; secondly, in order to better distinguish each component, create a material ball (Material) for each component and add different colors to distinguish it.

Logic processing: This module is divided into handle debugging, virtual positioning method, and test step setting. Handle debugging: the user implements the corresponding test steps in the test module through the handle. The specific process is to put the hand model under the controller of the handle, add a Box Collider to the hand model and adjust the size and shape of the box collider to make It adapts to the hand model; virtual positioning method: adopt a virtual positioning method based on geometric constraints; test step setting: digital classification assigns a corresponding number to each test step, and when the script is running, according to the one-to-one correspondence relationship, you can Know which step the current test is in.

Animation production: After dragging the Animation animation, plan the connection, and set the connection conditions. When writing scripts, use SetInteger(), SetFloat(), SetBool(), etc. to set the state value to realize the switching of animation clips, and there is an animation fusion effect during animation switching to make the transition of animation smoother. Perform animation recording for the operations in the corresponding test module, and put each animation into the Animator state machine for management.

The line dynamic test module 113 can place the electric locomotive corresponding to the virtual space in the corresponding state of the line dynamic test, and perform random simulation of the faults and abnormalities of the electric locomotive in its state. The line dynamic test module 113 also includes the electric locomotive. The corresponding standard process flow for the line dynamic test module. The line dynamic test module 113 includes the same part of the steps as the catenary power supply static test module 112. The difference is that the parameters in the model construction, environment construction, and logic processing are modified according to actual use needs, so as to be able to perform better tests. .

The main steps of the dynamic test are as follows:

Use the watt-hour meter to read out the values of consumed electric energy and regenerative electric energy before and after trial operation, automatic end change, wheel diameter setting, motor speed sensor inspection, motor vehicle test, constant speed control, ramp start test, reconnection control of locomotives (two-machine external Reconnection), connection speed, emergency brake and safety device, alert device, brake test, locomotive electric brake, parking brake, trial run. The expert library system 114 includes technical processes that need to be judged according to expert experience in the electric locomotive maintenance process, and no clear standard has been given in the outline.

The user chooses to enter the test scene, in which the user can conduct completely independent maintenance training according to the prompts.

The practice system 13 can place the electric locomotive in the virtual space in a random state to be overhauled and randomly simulate the failure or abnormality of the electric locomotive, and when the trainee has a wrong operation or process error during the practice, the trainee will be reminded of the correct procedure for the next step through the screen . In this embodiment, the correct process is the previous standard process flow. The practice system 13 can call the various test modules established above. Each test module includes a static test module 111 without catenary power supply, a static test module 112 with catenary power supply and a line dynamic test module 113. Through the steps in each test module The digital number judges whether the steps performed by the trainee are correct.

The examination system 14 includes placing the electric locomotive in a virtual space in a random state to be overhauled and randomly simulating the failure or abnormality of the electric locomotive, and scoring and displaying the correct rate and duration of the overhaul procedure of the trainees. The user chooses to enter the test scene, in which the user can conduct completely independent maintenance training according to the prompts.

The positioning device 43 includes a gravity sensor, a gyroscope and a laser position sensor, and the gravity sensor, the gyroscope and the laser position sensor are respectively electrically connected to the computer system. Gravity sensors, gyroscopes and laser position sensors are all existing mature technology equipment. The gravity sensor, gyroscope and laser position sensor provide corresponding functions for the VR head display 41 in the VR system 4 to ensure that students can study normally after entering the learning system 1 in the computer system 2 .

In this embodiment, the positioning device is an existing device, and the positioning device is also called a base station, which is a positioning device used to capture the player's position and body movements. It is generally placed at the upper diagonal of the three-dimensional space when used. The base station contains a laser transmitter. During operation, the invisible laser is emitted and received by the sensors on the helmet and the handle. The system will record the time when the laser is emitted from the base station and arrives at the sensor on the handle and helmet, so as to calculate the position of the handle and the helmet. , and then synchronize the position information to the position information of the model in the virtual scene to realize positioning.

Vr equipment includes external headsets, handles, base stations, transition boxes and various wires. The external headsets are connected to the computer first. The handles and base stations are wireless devices that transmit signals and data through sensors.

The mobile terminal 3 is capable of receiving student test scores and screenshots of test errors, and the mobile terminal 3 is an existing mature technical device. The mobile terminal 3 software needs to use qt for software development. The Android software host computer serves as a server to receive serial port and network data through tcp and uses an independent thread to decode files. The interface thread is responsible for display and event response.

The VR-based electric locomotive maintenance training system of the present invention sets the specific parts to be inspected of the electric locomotive and the corresponding states of the electric locomotive to be inspected according to the training content. In the test, the process is:

The modeling system 11 builds a real equal-scale electric locomotive battery and control power supply components, as well as the multimeter tool required for overhauling the module. The teaching system 12 is responsible for the demonstration of the standard maintenance procedure of the storage battery and control power supply test in the electric locomotive non-catenary power supply test. The practice system 13 is responsible for providing the trainees with the procedure exercises for the storage battery and the control power supply test in the catenary-free power supply test and the screen prompts when the trainees perform wrong operations or process errors. The examination system 14 is responsible for starting timing when the student chooses to enter the storage battery and control power supply test in the catenary-free power supply test, and taking screenshots when the student performs a wrong operation or a process error. The duration gives a score and sends it to the computer system 2 . The computer system is responsible for connecting the VR system 4 , the mobile terminal 3 and the learning system 1 , and receives the test scores and screenshots of wrong operations and sends them to the ultimate terminal 3 after the student's test is over. The mobile terminal 3 is responsible for receiving the student's test scores and screenshots of wrong operations.

Those skilled in the art will appreciate that the embodiments described here are to help readers understand the principles of the present invention, and it should be understood that the protection scope of the present invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific modifications and combinations based on the technical revelations disclosed in the present invention without departing from the essence of the present invention, and these modifications and combinations are still within the protection scope of the present invention.

Claims (10)

1. the electric locomotive maintenance training system based on VR is characterized in that: comprise VR system (4), computer system (2), mobile phone terminal (3), test module and expert library system (114), VR system (4) and The mobile terminal (3) is connected to the computer system (2) respectively, and the computer system (2) is also connected to the test module and the expert system (114), and the VR system (4) includes a VR head display (41), a VR handle (42) and The positioning device (43), the VR head display (41), the VR handle (42) and the positioning device (43) are electrically connected to each other; the computer system (2) is equipped with a learning system (1), and the learning system (1) includes modeling System (11), teaching system (12), practice system (13) and examination system (14), test module comprises non-catenary power supply static test module (111), has catenary power supply static test module (112) and Line dynamic test module (113), teaching system (12), exercise system (13) and examination system (14) are all connected with non-catenary power supply static test module (111), catenary power supply static test module (112) , the line dynamic test module (113) and the expert database system (114) are electrically connected; the modeling system (11) is used to construct the electric locomotive parts to be inspected and the virtual space in which the environment is constructed, and the teaching system (12 ) is used for the teaching of the electric locomotive maintenance process under different conditions, the practice system (13) is used for the trainees to practice the electric locomotive maintenance process after passing the learning of the teaching system, and the examination system (14) is used for the trainees to carry out the electric locomotive maintenance Examination of the process, it scores and displays and saves according to the operation time and correct rate of the students. At the same time, for the wrong operation and process errors of the students during the examination, the examination system (14) will save screenshots; the mobile terminal (3) is used for Receive student test results and test error screenshots, non-catenary power supply static test module (111) is used to implement the teaching mode, practice mode and test mode for electric locomotives placed in the state of non-catenary power supply in the corresponding virtual space The catenary power supply static test module (112) is used for the teaching mode, practice mode and examination mode of the electric locomotive placed in the corresponding virtual space under the catenary power supply state; the line dynamic test module (113) It is used to realize the teaching mode, practice mode and examination mode of the electric locomotive placed in the state of line dynamic test in the corresponding virtual space; the expert database system (114) is used to meet the needs of the electric locomotive maintenance process according to expert experience Judgment, the realization of the teaching mode, practice mode and examination mode of the clear and standard technological process has not been given in the outline; the students choose to enter the learning system (1) through the VR handle (42), and the VR head display (41) performs the correspondence of the students. For the display of the virtual space where the learning module is located, the positioning device (43) is used to acquire the actions of the students in the virtual space. 2. The VR-based electric locomotive maintenance training system according to claim 1, characterized in that: the modeling system (11) includes modeling of specific components of the electric locomotive, modeling of the state of the electric locomotive and modeling of maintenance equipment, The modeling of the specific components of the electric locomotive includes the modeling of the shape of the electric locomotive, the traction system of the electric locomotive, and the braking system of the electric locomotive. The state modeling of the electric locomotive completes the switching of the electric locomotive under different maintenance states by adjusting the state of the modeled components , the maintenance equipment modeling includes modeling the maintenance equipment of the electric locomotive and establishing the information database of the equipment. 3. The VR-based electric locomotive maintenance training system according to claim 1, characterized in that: said teaching system (12) includes when the electric locomotive has no catenary power supply state in the virtual space, when there is catenary power supply state and Demonstration of the correct standard process flow corresponding to the state of the line dynamic test, the process flow is in line with the routine test program of electric locomotives, and for the procedures that have not given clear indicators in the test program and require expert judgment, A corresponding expert database system (114) is established to solve the problem. 4. The VR-based electric locomotive maintenance training system according to claim 1, characterized in that: the non-catenary power supply static test module (111) can place the electric locomotive corresponding to the virtual space in the non-catenary power supply state, and randomly simulate the faults and abnormalities of the electric locomotive in its state, the non-catenary power supply static test module (111) also includes the corresponding standard process flow for the non-catenary power supply static test of the electric locomotive. 5. The VR-based electric locomotive maintenance training system according to claim 1, characterized in that: the static test module (112) with catenary power supply can place the electric locomotive corresponding to the virtual space in a catenary power supply. state, and simulate the faults and abnormalities of the electric locomotive in its state, the catenary power supply static test module (112) also includes the corresponding standard process flow when the catenary power supply static test is performed on the electric locomotive. 6. The VR-based electric locomotive maintenance training system according to claim 1, characterized in that: the line dynamic test module (113) can place the electric locomotive corresponding to the virtual space in the corresponding state of carrying out the line dynamic test, and Randomly simulate the faults and abnormalities of the electric locomotive in its state, and the line dynamic test module (113) also includes the corresponding standard process flow when performing the line dynamic test module on the electric locomotive. 7. The VR-based electric locomotive maintenance training system according to claim 1, characterized in that: the expert library system (114) includes those that need to be judged according to expert experience in the electric locomotive maintenance process, and have not been clearly given in the outline. Standard process. 8. The VR-based electric locomotive maintenance training system according to claim 1, characterized in that: the exercise system (13) can place the electric locomotive in the virtual space in a random state to be overhauled and randomly simulate the failure of the electric locomotive or abnormality, and when a wrong operation or process error occurs during the trainee's practice, the trainee will be reminded of the correct process for the next step through the screen. 9. The VR-based electric locomotive maintenance training system according to claim 1, characterized in that: the examination system (14) includes placing the electric locomotive in the virtual space in a random state to be overhauled and randomly simulating the failure of the electric locomotive Or abnormal, and score and display the correct rate and duration of the trainee's maintenance procedures. 10. The VR-based electric locomotive maintenance training system according to claim 1, characterized in that: the positioning device (43) includes a gravity sensor, a gyroscope and a laser position sensor, and the gravity sensor, a gyroscope and a laser position sensor The sensors are respectively electrically connected with the computer system.

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