DY escalator installation and maintenance virtual simulation experiment platform

Release time：2024-07-07 10:00viewed：times

1. Management subsystem

The management subsystem consists of user management, major management, teacher management, class management and student management. The functions are as follows:
(1) User management: system user name, account, password and permission definition;
(2) Major management: including major name, usage status and other information;
(3) Class management: including class name, class description, major, etc.;
(4) Teacher management: m*nly including user name, name, gender, telephone number, em*l address and major, etc.;
(5) Student (candidate) management: student (candidate) name, account, password, class, etc., receiving exam or practice tasks.

2. Teaching subsystem
The teaching subsystem consists of functional modules such as teaching resource library, my courseware folder, learning task release, learning situation analysis, and student end. Its features are as follows:
(1) The management platform’s built-in 3D virtual simulation teaching resource library, which consists of 3D animation teaching resource packages and 3D virtual tr*ning resource packages for each course, is constructed according to projects, tasks, knowledge and skills points, etc. Teachers can also customize and upload other courseware resources that need to be shared, such as: electronic teaching plans, PPT, teaching videos, pictures, documents, etc.;
(2) Teachers can customize courseware folders with their own characteristics according to teaching requirements. Courseware folders can choose the 3D virtual simulation resources that come with the platform, or they can customize and upload other courseware resources, such as: PPT, videos, etc., for classroom teaching;
(3) Teachers can selectively release learning or tr*ning tasks according to the teaching progress for students to learn during or after class;
(4) The teacher end can query students’ online, login, learning time, practice scores, etc.

3. Assessment Subsystem
(1) Question Bank Management:
Question bank management m*nly includes question bank classification management and question bank content management:
Question bank classification management: supports customization. For assessment items of different majors, classification settings can be made according to question type (such as single-choice questions, multiple-choice questions, true or false questions, etc.) or question content attributes; Question
bank content management: Questions can be edited by category, including number, content, question type, category, answer and other information, and supports the import of customized and standard questions.
(2) Examination Management:
Examination management includes paper composition management and assessment management modules;
Paper composition management: includes definition functions such as examination class, invigilator, examination time, and paper composition; Paper composition rules can be customized, and both manual and automatic paper composition methods are supported;
Assessment Management: m*nly manages the assessment process and results; includes two major functions: the invigilator end and the student (candidate) end; the invigilator end can review the candidate's identity online, set and monitor the candidate's status, manage the assessment results, etc. The student (candidate) end can answer questions online after logging in.
(3) Practice management:
Students can conduct many functions online, including self-test exercises, organizing unified examinations, conducting knowledge competitions, assigning extracurricular or holiday homework, intelligent test composition, answer sheet review and grade management;
(4) Student (candidate) side:
The student (candidate) side module provides students with the ability to take mock exams, formal exams, complete homework and practice on the computer.
Virtual simulation teaching system
Mechanical tr*ning safety education virtual simulation software: This software is developed based on unity3d. The software adopts the form of three-dimensional roaming. The movement can be controlled by the keyboard and the direction of the camera can be controlled by the mouse. There are mechanical safety distance experiments, mechanical safety protection device experiments, and basic assessments of mechanical safety protection design. During the experiment, the three-dimensional roaming screen uses arrows and footprints to prompt movement to the experimental position. The circle around the mechanical object shows the working radius. The experimental process is accompanied by a dialog box reminder of the three-dimensional robot.
A. The content of the mechanical safety distance experiment includes the safety distance experiment to prevent the upper and lower limbs from touching the dangerous area (with two types of fence height and opening size). After entering, the GB23821-2009 "Safety distance to prevent the upper and lower limbs from touching the dangerous area" requirement pops up in front of the camera. Wrong demonstration: the experiment process is that after the human body enters the working radius of the mechanical object and is injured, the bloody picture and voice reminder receive mechanical injury, and return to the original position and conduct the next experiment. The last step is the correct approach.
B. The mechanical safety protection device experiment is divided into safety interlock switch, safety light curt*n, safety mat, safety laser scanner and other protection device experiments. The optional categories (safety input, safety control, safety output, other), manufacturer, product list (safety interlock switch, safety light curt*n, safety mat, safety laser scanner, safety controller, safety relay, safety fence). There is a blue flashing frame reminder at the installation location. The experimental process: select the safety fence and install it, select the safety interlock switch (or select the safety light curt*n, safety mat, safety laser scanner) and install it, select the safety controller and install it to the electrical control box, select the safety relay and install it to the electrical control box, and click the start button on the electrical control box. If entering a dangerous area, the system will sound an alarm and the mechanical object will stop working. You can stop by pressing the reset button on the electrical control box.
C. The basic assessment of mechanical safety protection design requires the installation of the mechanical safety system to be completed, and the safety guardr*l, safety interlock switch, safety light curt*n, safety mat, safety laser scanner, safety controller, safety relay, 24V power supply, signal light and emergency stop button to be correctly installed. The assessment is divided into ten assessment points. Some assessment points have three options, which students can choose freely. After the final 10 assessment points are selected, submit for confirmation, and the system will automatically derive the total score and the score of each assessment point.
D. The software must be on the same platform as a whole and must not be displayed as a separate resource.
E. At the same time, the VR installation package of this software is provided to customers to facilitate users to expand into VR experiments. VR equipment and software installation and debugging do not need to be provided.
Mechanical assembly and benchwork assembly virtual simulation software: This software is developed based on unity3d, with optional 6 levels of image quality. It has the design and virtual disassembly and assembly of reducers and shaft structures, design and simulation of common mechanical mechanisms , mechanism resource library, typical mechanical mechanisms (virtual disassembly and assembly of gasoline engines). The software is an integrated software and cannot be a separate resource.
A. Reducer design and virtual disassembly and assembly interface can choose worm gear bevel gear reducer, two-stage expanded cylindrical gear reducer, bevel cylindrical gear reducer, coaxial cylindrical gear reducer, bevel gear reducer, and one-stage cylindrical gear reducer.
Worm bevel gear reducer: After entering the software, the assembly content will be automatically played, and each step in the video will be described in text.
Secondary unfolded cylindrical gear reducer: After entering the software, the content will be played in the form of video. The video content should include: part name (scan the QR code to see the part name), disassembly demonstration (including disassembly, assembly), virtual disassembly (including the whole, low-speed shaft, medium-speed shaft, high-speed shaft, box cover, box seat)
Bevel cylindrical gear reducer, coaxial cylindrical gear reducer, bevel gear reducer, first-level cylindrical gear reducer: click to enter and automatically jump to the edrawings interface. The models are all three-dimensional models . By clicking on the parts to display the part name, you can rotate 360° in all directions, zoom in, zoom out, and translate. At the same time, you can use the move parts function to disassemble and assemble the entire reducer. At the same time, you can select the home button to return to the original state of the reducer. The bevel gear reducer and the first-level cylindrical gear reducer have added the function of inserting cross sections, and the cross sections can be freely dragged to observe the internal structure of the reducer.
B. The design of the shaft system structure and the virtual disassembly and assembly interface can select part recognition, disassembly and assembly demonstration, and actual combat operation.
1. Part recognition: The built-in 3D models and part names of helical gears, end caps without holes, couplings, coupling keys, shafts, gear keys, end caps with holes, sleeves, and deep groove ball bearings are set. Any part can be rotated 360°.
2. Disassembly and assembly demonstration: There are 2 built-in cases. When the mouse is moved to a cert*n part position (except the base and the bearing seat), the part is automatically enlarged and the part name is displayed. There are disassembly and assembly buttons. The software automatically completes the disassembly and assembly of the shaft system structure. The 3D scenes can be rotated 360°, enlarged, reduced, and translated.
3. Actual operation: The 3D parts are neatly placed on the desktop. Students manually select the corresponding parts and move them to the shaft system structure. The parts can be installed only when the placement order and position are correct. There is a restart button to facilitate students to repeat the virtual experiment. When the mouse is moved to a cert*n part position (except the base and the bearing seat), the part is automatically enlarged and the part name is displayed.
C. Common mechanical mechanism design and simulation: optional hinged four-bar mechanism design and analysis, I\II type crank rocker mechanism design and analysis, offset crank slider mechanism design and analysis, crank swing guide rod mechanism design and analysis, hinged four-bar mechanism trajectory synthesis, eccentric linear roller push rod cam , concentric linear flat push rod cam .
1. Each mechanism should be able to input corresponding parameters, and the software can automatically calculate the parameters, and can perform motion simulation and automatically draw curves.
D. The mechanism resource library can choose 11 types of planar connecting rod mechanisms, 5 types of cam mechanisms, 6 types of gear mechanisms, 8 types of transmission mechanisms, 11 types of tightening mechanisms, 6 types of gear tr*n mechanisms, and 8 types of other mechanisms (mechanical equipment simulation).
E. Virtual disassembly and assembly of gasoline engines can choose crankcase assembly and disassembly demonstration, crankcase virtual assembly, valve system assembly and disassembly demonstration, and valve system virtual assembly.
1. The crankcase assembly and disassembly demonstration and the valve system assembly and disassembly demonstration are equipped with disassembly buttons, assembly buttons, restart buttons, and decomposition observation buttons. When the mouse moves to a cert*n part position, the part is automatically enlarged and the part name is displayed. The function is automatically completed by the software to disassemble and assemble the shaft system structure. When the decomposition observation button is used, the three-dimensional model of the crankcase or valve system automatically displays an exploded view, which can be rotated 360° in all directions, enlarged, reduced, and translated.
2. The three-dimensional parts of the crankcase virtual assembly and the valve system virtual assembly are neatly placed on the desktop. Students manually select the corresponding parts and move them to the mechanism. The parts can only be installed when the placement order is correct and the position is correct. There is a restart button to facilitate students to re-conduct virtual experiments. When you move the mouse to cert*n parts, the part name will be automatically displayed.

4. Personal Learning Center
After logging in, students can receive and learn online the tasks assigned by teachers. Students can learn virtual simulation courses, interactive forums, practical tr*ning courses, assessments, rankings, etc. in the personal learning center; the

student personal learning center has modules such as learning tasks, learning status, interactive forums, test papers, homework books, and exercises.
(1) Learning tasks:
Students receive learning tasks issued by teachers and learn by selecting each task module in the learning tasks;
(2) Learning status:
You can view the content, learning time, learning duration and score det*ls of students;
(3) Interactive forum:
Let learners communicate with each other and answer questions in the simplest way;
(4) Test papers, homework books, and exercises:
Students receive tests issued by teachers or answer practice homework.

5. Cloud Platform
The cloud education platform includes modules such as experience courses, essence courses and information release. Experience courses are for visitors to watch and experience resource courses; essence courses include all 3D practical simulation questions, and users can browse and learn resources according to the divided resource permissions; the information release module releases industry trends, laws and regulations, and professional information every day.
(1) The homepage includes popular course rankings (sorted by the number of collections), course rankings (sorted by the number of views), free experience area, course essence area and information release.
(2) In the course ranking area, you can directly click on the course name to browse course resources. (3
) In the free experience area, you can directly click on the course image to enter the course viewing page.
(4) In the course essence area, after logging in, you can directly click on the course image to enter the course viewing page.
(5) The course module allows users to enter the course viewing page. During the viewing process, the system will automatically record the user's viewing time, end viewing time and duration. Users can view their browsing history in the "Playback Record" module; at the same time, users can collect courses, and then the course will appear in the "My Collection" column, and users can conveniently browse their favorite courses. In the common toolbar, click "My Site" to view the playback records and favorite courses.
(6) The information release module will play **news information in a carousel to help users view the required information more quickly.

PC version
(1) 3D teaching resources
General requirements:
The service target is teachers, and the m*n body is 3D animation, which is convenient for teachers to teach students conveniently and quickly.
St*rway guide r*l system: Through animation display, introduce the function, location and composition of the guide r*l system. The complex guide r*l device that is not easy to see is separated and introduced separately, and the guide r*l, counter r*l, turning wall, etc. are introduced separately, as well as the relationship between the guide r*l system and the steps and transmission system.

Teaching Projects	Teaching tasks	Content (Function) Introduction
Escalator structure and principle	Understanding escalators	Through animation, the escalator is introduced from the following three aspects, so that learners can have an understanding of the appearance of the escalator: 1. Multi-angle appearance display 2. How the internal functional units work in coordination 3. The decomposition and synthesis of the entire escalator, showing the relative positions of the m*n functional devices of the escalator
	truss	Through animation display, the structure, function, material requirements and m*n technical requirements of the truss are introduced.
	Drive device	Through animation, the power source of the escalator, the composition and installation location of the drive device are introduced, and its working principle is expl*ned through the operation animation of each component of the drive device one by one.
	Step transmission system	Through animation, the function, location and composition of the transmission system are introduced. The operation principle of the steps (including how to achieve reverse track, etc.) and the working principle of the drive chn tensioner are explned by showing the operation of each component of the transmission system one by one.
	St*rway guide system	Through animation, the function, location and composition of the guide rl system are introduced. The complex guide rl device that is not easy to see is separated and introduced separately, and the guide rl, counter rl, turning wall, etc. are introduced separately, as well as the relationship between the guide r*l system and the steps and transmission system.
	step	Through animation, the structure and materials of the steps, as well as their relationship with the traction ch*n are introduced.
	Handr*l system	The handrl system is divided into four parts: the composition of the handrl belt device, the driving device, the belt pressing device and the tensioning device, as well as the bracket and the guide r*l. The functions, positions, and working principles of each part are introduced through animation. The complex parts that are not easy to see are separated and introduced with independent component models.
	Safety protection device	Through animation display First, the name, function and location of the necessary installation protection devices required by the escalator device specification are introduced. Then, the action principles of the safety devices such as handrl entrance protection, comb tooth foreign body protection, step traction chn loosening, broken loose protection, apron plate gap abnormality protection, step collapse protection, and emergency stop button are introduced one by one by simulating faults.
Installation of escalators	On-site connection of trusses	Through animation, the requirements for fasteners and tools when trusses are connected on site are introduced. (Introduction to some key process requirements)
	Hoisting escalator	Through animation display, the requirements for the lifting point of the escalator, the support requirements during the lifting process, the safety construction requirements and the adjustment of the step ends are introduced.
	Install (remove) steps	Through animation, the installation process of the ladder is introduced, including the ladder installation point, installation process and post-installation inspection.
	Installing the handr*l	Through animation, the installation of handrls is introduced in the order of handrl installation process, including installation of handr*ls, adjustment of tensioning device, belt pressing device, etc.
Escalator m*ntenance and care	General m*ntenance rules	Safety precautions
	M*ntenance of equipment in the computer room	Mntenance of flywheel speed sensor Mntenance of machine room environment Mntenance of reduction box Mntenance of control cabinet Mntenance of brake Mntenance of mn drive chn protection switch Mntenance of mn drive ch*n
	Step and comb plate m*ntenance	Comb plate mntenance Step mntenance
	Handrl mntenance	Handrl guard switch mntenance Handrl device mntenance
	M*ntenance of automatic lubrication device	M*ntenance of automatic lubrication device
	M*ntenance of the tensioning device	M*ntenance of the tensioning device
	Ladder road m*ntenance	Ladder road m*ntenance
	Skirt plate, inclined cover plate m*ntenance	Skirt plate, inclined cover plate m*ntenance
	M*ntenance operation panel, key switch and emergency stop switch inspection	Mntenance of mntenance operation panel

(2) The 3D virtual tr*ning resources
are m*nly developed to cooperate with the teaching content of escalators. The content m*nly includes exercises on the structure of escalators, safety protection devices and working principles, escalator m*ntenance and escalator installation. The service target is students. The m*n body is in the form of exercises, using U3D programming and animation as the expression and interaction method, allowing students to perform relevant simulation operations in the simulation scene, so that students can easily and interestingly accept, understand and become familiar with and even integrate the teacher's teaching content.

▲Example 1, installing steps (steps or knowledge points: step installation position, step auxiliary wheel r*l entry position, fixing steps); Example 2, handr*l device m*ntenance (1) (steps or knowledge points: determining the handr*l device m*ntenance items, handr*l device drive ch*n m*ntenance, handr*l belt tensioning check)

project	Task	Content (knowledge and skills)
The structure of an escalator	Understanding the structure of escalators-1	Knowledge about escalator trusses l Understanding truss devices l Functions and deflection requirements of trusses l Truss installation requirements l Truss connection requirements
	Understanding the structure of escalators-2	Knowledge about escalator machine room l Machine room location l Drive and control device l Drive ch*n function
	Understanding the structure of escalators-3	Knowledge about escalator drive system l Escalator drive system l Step drive system l Step drive chn l Step chn tensioning device
	Understanding the structure of escalators-4	Knowledge about escalator guide rl system l Step guide rl system structure l Step guide rl system components l Step guide rl system support l Step reversal
	Understanding the structure of escalators-5	Ladder related knowledge l Ladder position l Ladder structure l Ladder parameters l Ladder installation and removal position
	Understanding the structure of escalators-6	Knowledge about handrls l Handrl system structure l Handrl system drive part l Handrl system composition l Handr*l belt operation
	Understanding the structure of escalators-7	Knowledge about handrl tensioning device l Handrl speed requirement l Handrl tensioning device installation position l Handrl tensioning adjustment l Adjusting handr*l
	Understanding the structure of escalators-8	Comb plate related knowledge l Comb plate installation location l Comb plate function l Comb plate and step meshing
	Understanding the structure of escalators-9	Electrical device related knowledge l Electrical control device installation location l Other electrical device installation location l Inspection box
	Understanding the structure of escalators-10	Knowledge about lubrication devices l Parts of escalators that need lubrication l Installation location of automatic lubrication devices l Installation requirements of lubrication devices
	Understanding the structure of escalators-11	Installation location of escalator device l Drive device l Comb plate l Handr*l l Steps
	Understanding the structure of escalators-12	Basic technical parameters of escalators : escalator inclination angle , step width , step wheel
Safety device location and operation	Escalator safety protection device-1	Knowledge about escalator safety devices l Safety switch or device for steps l Safety switch or device for handrl l Chn loosening (breaking) protection switch or device l Device for speed detection and direction protection of the m*n elevator
	Escalator safety protection device-2	Knowledge about escalator safety devices l Safety switch or device for apron plate l Safety switch or device for comb plate l Power f*lure protection device l Electrostatic discharge device l Terminal cover protection device
	Handr*l inlet protection device	Knowledge about handrl inlet protection device l Installation location of handrl inlet protection device l Check the reliability of handr*l inlet protection device
	Comb plate protection device	Knowledge about comb plate protection device l Installation location of comb plate protection device l Check the reliability of comb plate protection device l Determine the reliability of comb plate protection device
	Step ch*n break protection device	Knowledge about step chn break protection device l Installation location of step chn break protection device l Check the gap between step chn break protection switch and the plate l Check the reliability of step chn break protection switch
	Step collapse protection device	Knowledge about step collapse protection device l Installation location of step collapse protection device l Check the clearance between step spindle and lever l Check the reliability of step collapse protection switch
	Skirt guard	Knowledge about apron plate protection device l Working surface of apron plate protection switch l Check the gap between apron plate and steps l Check the reliability of apron plate protection device
	Non-operating reverse protection device	Knowledge about non-operational reversal protection devices l Installation location l Switch action during device protection l Verify the reliability of protection switches
	Handr*l belt break protection device	Knowledge about handr*l broken belt protection device l Installation location l Determine the installation conditions of the broken belt protection device l Verify the reliability of the protection switch
	Drive ch*n break protection device	Related knowledge of drive chn break protection device l Installation location l Determine the action premise of drive chn break protection device l Verify the reliability of protection switch
	Additional brake protection device	Additional brake protection device related knowledge l Installation location l Installation requirements l Working principle
Escalator m*ntenance	M*ntenance and safety operation-1	Knowledge related to mntenance and safety operation l Escalator mntenance cycle l Judging whether the preparation work before m*ntenance complies with the safety operation regulations based on the animation l The location of the emergency stop button and safety switch
	M*ntenance safety operation-2	Knowledge about mntenance safety operations l Mntenance safety rules l Judging whether m*ntenance work complies with safety regulations based on animations
	Mntning the drive unit	Mntenance knowledge of the drive mn engine l Mntenance items of the drive mn engine l Check the lubricating oil of the gear box l Check the temperature rise of the motor during operation
	Brake m*ntenance	Knowledge related to brake mntenance l Determine brake mntenance items l Block brake temperature rise inspection and manual brake release inspection l Band brake lubrication and brake band inspection
	Drive chn mntenance	Mntenance knowledge of drive chn l Determine chn mntenance items l Mn drive chn mntenance l Step drive chn m*ntenance
	Handrl mntenance (1)	Knowledge related to handrl mntenance l Determine the handrl mntenance items l Mntenance of handrl drive chn l Handrl belt tensioning check
	Handrl mntenance (2)	Knowledge about handrl mntenance l Handrl appearance and speed inspection l Handrl friction wheel mntenance l Handrl synchronization inspection
	Comb plate m*ntenance	Knowledge about the m*ntenance of comb plates l Comb plate appearance inspection l Comb plate and step meshing inspection
	Ladder road m*ntenance	Knowledge about ladder mntenance : rl cleaning, tightness check, tangential r*l inspection
	Control cabinet m*ntenance	Knowledge related to control cabinet mntenance l Determine the control cabinet mntenance items l Control cabinet mntenance l Repr operation box m*ntenance
	Common escalator faults and troubleshooting-1	Fault phenomenon judgment and analysis exercises l Handr*l fault phenomenon l Fault analysis l Fault handling
	Common escalator faults and troubleshooting-2	Practice judging and analyzing based on the phenomenon l Ladder fault phenomenon l Fault analysis l Fault handling
	Common escalator faults and troubleshooting-3	Exercises on judging and analyzing based on phenomena l Transmission ch*n fault phenomena l Fault analysis l Fault handling
Escalator installation	Installing the steps	Knowledge about installing steps l Where to install the steps l Position of the step auxiliary wheels into the r*l l Fixing the steps l Post-installation inspection
	Removing steps	Knowledge about step removal Where to remove the step How to remove the step
	Installing the handr*l	Knowledge related to installing handrls l Installation sequence l Installation of glass wall protection l Installation of handrls
	On-site connection of trusses	Truss hoisting and connection related knowledge l Tool preparation l Hanging position l Connection operation
	Installation of step ch*n protection device	Knowledge on installing step chn protection device l Point out the step chn l Install the ch*n
	Step ch*n installation	Knowledge related to step chn installation l Point out the installation position of the step chn protection device l Select the installation components l Install the step ch*n protection device
	Str*ghtening ladder road	Practice judging and analyzing phenomena l Scratches on the apron l Point out the alignment adjustment position l Alignment adjustment operation

VR version
1. Escalator structure
1) Non-operational reversal protection device
2) Handr*l entrance protection device
3) Handr*l broken belt protection device
4) Comb plate protection device
5) Step ch*n broken ch*n protection device
6) Step collapse protection device
7) Apron plate protection device 8
) Escalator safety protection device - 1
9) Escalator safety protection device - 2
10) Additional brake protection device
11) Drive ch*n broken ch*n protection device

2. Escalator installation
12) Step installation
13) Step removal
14) Handr*l installation
15) Truss hoisting and connection
16) Step ch*n broken ch*n protection device installation
17) Step ch*n installation
18) Str*ghtening the escalator path

3. Escalator m*ntenance
19) Handr*l device m*ntenance - 1
20) Handr*l device m*ntenance - 2
21) Common escalator faults and troubleshooting - 1
22) Common escalator faults and troubleshooting - 2
23) Common escalator faults and troubleshooting - 3
24) M*ntenance of control cabinet and rep*r operation box
25) Ch*n m*ntenance
26) M*ntenance of drive host
27) M*ntenance of comb plate
28) M*ntenance of st*rway
29) M*ntenance safety operation - 1
30) M*ntenance safety operation - 2
31) M*ntenance of brake

Note: The det*led knowledge and skills of the above resources are the same as those of the PC version 3D virtual tr*ning resource package

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