Virtual simulation teaching system based on SDH equipment

Abstract

The invention discloses a virtual simulation teaching system based on SDH (Synchronous Digital Hierarchy) equipment. The virtual simulation teaching system comprises mixed reality head display equipment, an SDH equipment simulation device and a data service device, the SDH equipment simulation device is used for constructing an SDH equipment simulation model, an optical power meter simulation model and an optical attenuator simulation model; the SDH equipment simulation device is further used for transmitting the SDH equipment simulation model, the optical power meter simulation model and the optical attenuator simulation model to mixed reality head display equipment, and the mixed reality head display equipment is used for displaying a virtual SDH equipment simulation model, a virtual optical power meter simulation model and a virtual optical attenuator simulation model; the data service device is used for providing a video tutorial of an SDH equipment simulation model principle, a video tutorial of alarm processing and a document for the mixed reality head-mounted display equipment; according to the invention, the problem of insufficient precision of the simulation model of the virtual SDH equipment is solved, interaction with the simulation model of the virtual SDH equipment is realized, and the practical operation ability of students is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of SDH equipment fault maintenance simulation teaching, in particular to a virtual simulation teaching system based on SDH equipment. Background Art

[0002] With the rapid development of communications technology, fiber-optic transmission equipment is critical infrastructure for optical communication networks, serving as the driving force behind the transmission of communication traffic. The rapid advancement of optical transmission equipment technology has become the engine driving the rapid development of the ICT era. SDH equipment, as the core of transmission networks, is widely used in industries such as power, finance, and telecommunications, and its technology is rapidly advancing. Consequently, timely troubleshooting and repair of SDH equipment faults have become increasingly important. To improve these skills, students are often offered training courses.

[0003] At present, although the existing virtual simulation system can partially replace physical equipment, there is a problem of insufficient accuracy of the virtual SDH equipment simulation model. In the SDH equipment simulation teaching system, patent CN115426343A discloses a cross-platform teaching system that constructs a simplified three-dimensional model, retaining only the appearance of the SDH equipment, and cannot realize the dynamic change of port optical power. Students cannot perform gesture operation, which reduces their practical operation ability; patent CN112148890B proposes a fault diagnosis method based on knowledge graph, which has the problem of unable to interact in real time, and students cannot use gestures to operate virtual SDH equipment for troubleshooting. Summary of the Invention

[0004] The purpose of the present invention is to provide a teaching system based on virtual simulation of SDH equipment, which solves the problem of insufficient precision of virtual SDH equipment simulation model, realizes interaction with virtual SDH equipment simulation model, and improves students' practical operation ability.

[0005] The present invention is implemented by the following technical solution: a virtual simulation teaching system based on SDH equipment, comprising: Mixed reality head-mounted display equipment, SDH equipment simulation device and data service device; The SDH equipment simulation device is connected to the mixed reality head display device by signal, and the mixed reality head display device is connected to the data service device by signal; The SDH equipment simulation device is used to construct an SDH equipment simulation model, an optical power meter simulation model, and an optical attenuator simulation model. The SDH equipment simulation device is also used to obtain real-time parameters of the network management system and map the real-time parameters to the SDH equipment simulation model. The SDH equipment simulation device is also used to transmit the SDH equipment simulation model, the optical power meter simulation model, and the optical attenuator simulation model to a mixed reality head-mounted display device, which is used to display a virtual SDH equipment simulation model, a virtual optical power meter simulation model, and a virtual optical attenuator simulation model. The data service device is used to provide the mixed reality head-mounted display device with video tutorials on the principles of the SDH equipment simulation model, video tutorials on alarm handling, and documentation. The mixed reality head-mounted display device is used to display a virtual SDH device simulation model, a virtual optical power meter simulation model, and a virtual optical attenuator simulation model, and recognize the student's gestures. It measures the optical power of the port of the virtual SDH device simulation model based on the virtual optical power meter simulation model, and measures the bit error rate of the port of the virtual SDH device simulation model based on the virtual optical attenuator simulation model, and determines whether the virtual SDH device simulation model has a fault.

[0006] Furthermore, the SDH equipment simulation device includes a laser scanner, a first terminal device and a data converter; The laser scanner is signal-connected to the first terminal device, and the data converter is signal-connected to the first terminal device and the physical SDH device respectively; the first terminal device is signal-connected to the mixed reality head-mounted display device; the first terminal device is provided with a camera; the camera is signal-connected to the first terminal device; the mixed reality head-mounted display device is signal-connected to the data processor; The laser scanner is used to collect point data of the physical SDH equipment, components, optical power meters, and optical attenuators, and transmit the collected point data to the first terminal device; the camera is used to take photos of the physical SDH equipment from multiple angles, and transmit the photographed photos to the first terminal device; the Agisoft Metashape software of the first terminal device is used to identify the surface texture, pattern, color, and material of the physical SDH equipment, optical power meters, and optical attenuators in the photos, and construct an SDH equipment simulation model, an optical power meter simulation model, and an optical attenuator simulation model based on the point data and the identified surface texture, pattern, color, and material of the physical SDH equipment, optical power meters, and optical attenuators; The data converter is used to obtain real-time parameters of the network management system and map the real-time parameters to the SDH equipment simulation model. The first terminal device is also used to transmit the SDH equipment simulation model, the optical power meter simulation model and the optical attenuator simulation model to the mixed reality head display device.

[0007] Furthermore, the mixed reality headset device includes a shader, a Unity development engine and a gesture recognizer. The shader is used to adjust the speed of light particles, the Unity development engine is used to establish a virtual SDH equipment simulation model, and the gesture recognizer is used to recognize the students' five-finger pinch gesture, pan gesture, single-click gesture, thumb and index finger open gesture, palm push gesture and double-click gesture.

[0008] Furthermore, the mixed reality head-mounted display device is used to display a virtual SDH device simulation model and a virtual optical power meter simulation model when receiving a composite fault instruction sent by a trainee, and the mixed reality head-mounted display device is used to recognize the trainee's gestures, and measure the optical power of the port of the virtual SDH device simulation model according to the recognized trainee gestures and the virtual optical power meter simulation model to determine whether the virtual line has a breakpoint; the mixed reality head-mounted display device is used to determine whether the node parameters are faulty according to the color of the virtual node parameter interface when it is determined that the virtual line has no breakpoints; the mixed reality head-mounted display device is also used to measure the bit error rate of the port of the virtual SDH device simulation model according to the recognized trainee gestures and the virtual optical attenuator simulation model when it is determined that the node parameters are not faulty, and determine whether the virtual device hardware is faulty according to the bit error rate and the bit error rate threshold.

[0009] Furthermore, when the optical power measured by the virtual optical power meter simulation model is less than the power threshold, it is determined that a breakpoint occurs in the virtual line; when the optical power measured by the virtual optical power meter simulation model is greater than or equal to the power threshold, it is determined that there is no breakpoint in the virtual line; When the mixed reality headset is used to confirm that there are no breakpoints in the virtual circuit and the node parameter interface is red, the node parameter is faulty; when the node parameter interface is green, the node parameter is normal; When the bit error rate measured by the virtual optical attenuator simulation model is greater than the bit error rate threshold, the virtual device hardware fails; when the bit error rate measured by the virtual optical attenuator simulation model is less than or equal to the bit error rate threshold, the virtual device hardware is not faulty.

[0010] Furthermore, the composite fault instruction includes a first-level fault instruction, a second-level fault instruction, and a third-level fault instruction. The mixed reality head-mounted display device is further configured to adjust the speed of light particles upon receiving the first-level fault instruction, so that the optical fiber material changes from transparency to turbidity. The mixed reality head-mounted display device is further configured to recognize a translation gesture, so that the virtual line can be dragged and moved using the translation gesture to complete the repair of the optical fiber break. When the mixed reality head-mounted display device receives a secondary fault instruction, it adjusts the light particle speed so that the color of the node parameter interface is red. The mixed reality head-mounted display device is also used to display the correct node parameters, allowing the trainee to input the correct node parameters through translation and single-click gestures to complete the node parameter fault repair; When the mixed reality head-mounted display device receives a third-level fault instruction, it adjusts the speed of light particles to cause the virtual device hardware to flash red. The mixed reality head-mounted display device is also used to recognize five-finger pinch and pan gestures to complete the replacement of the virtual device hardware.

[0011] Furthermore, the mixed reality head-mounted display device is also used to monitor the trainee's operating steps, the number of times the virtual optical power meter simulation model is used, and the handling time in real time during the process of troubleshooting and repairing first-level faults, monitor the trainee's operating steps and the handling time in real time during the process of troubleshooting and repairing second-level faults, and monitor the trainee's operating steps, the number of times the virtual optical attenuator simulation model is used, and the handling time in real time during the process of troubleshooting and repairing third-level faults, and transmit the trainee's operating steps, the number of times the virtual optical power meter simulation model is used, the number of times the virtual optical attenuator simulation model is used, and the handling time to the data service device.

[0012] Furthermore, the mixed reality head-mounted display device is also used to display a virtual account login interface. After the trainee enters the account, the mixed reality head-mounted display device displays a virtual interface with principle learning, commissioning and debugging, alarm handling, virtual practice, trend data and analysis and evaluation. The mixed reality head-mounted display device is also used to display video tutorials and documents on SDH equipment principles when the trainee clicks on the principle learning through virtual gestures. The mixed reality head-mounted display device is also used to display a virtual interface of the SDH equipment simulation model running when the trainee clicks on commissioning and debugging through virtual gestures. The mixed reality head-mounted display device is also used to display video tutorials and documents on alarm handling of the SDH equipment simulation model when the trainee clicks on the alarm handling through virtual gestures. The mixed reality headset device is also used to display a virtual interface with first-level faults, second-level faults and third-level faults when the trainee clicks on the virtual practice through virtual gestures; the mixed reality headset device is also used to display the operation trend data of the virtual SDH equipment when the trainee clicks on the trend data through virtual gestures; the mixed reality headset device is also used to display the virtual interface of the scoring report when the trainee clicks on the analysis and scoring through virtual gestures.

[0013] Furthermore, the data service device includes a data processor, a data server, a media server, and a file server; The data processor is respectively connected to the mixed reality head display device signal; the data server, media server and file server are respectively connected to the data processor signal; The data processor is used to determine the completeness of the trainee's operating steps, the number of times the virtual optical power meter simulation model is used, the number of times the virtual optical attenuator simulation model is used, and the handling time based on the operating steps monitored by the hybrid head-mounted display device, the number of times the virtual optical power meter simulation model is used, and the handling time. The data processor is also used to generate a scoring report based on the completeness of the trainee's operating steps, the number of times the tool is misused, and the timeout. The media server is used to provide video tutorials on the principles of the SDH equipment simulation model and video tutorials on alarm handling; the data server is used to store scoring reports, user information, and correct node parameters; and the file server is used to provide documents on the principles of the SDH equipment simulation model and documents on alarm handling.

[0014] Furthermore, the virtual simulation teaching system based on SDH equipment also includes: The second terminal device and the router; the second terminal device is signal-connected to the mixed reality headset device and the first terminal device respectively; the router is signal-connected to the first terminal device and the second terminal device respectively; the second terminal device is used to display the account login interface, and the second terminal device is used to display the interface with student management, viewing learning progress, remote communication and large-screen display after the teacher enters the account; the second terminal device is also used to display the interface of student information when the teacher clicks on student management, the second terminal device is also used to display the interface of student training progress when the teacher clicks on viewing learning progress, the second terminal device is also used to display the interface of remote call with students when the teacher clicks on remote communication, and the second terminal device is also used to display the interface of student training content when the teacher clicks on large-screen display.

[0015] Advantages of the present invention: In the present invention, a laser scanner is used to collect point data of physical SDH equipment, boards, ports, power modules, SFP optical modules, and LED lights, so that the single-point accuracy reaches 0.02 mm and the point pitch reaches 0.5 mm. Agisoft Metashape software recognizes the surface texture, pattern, color, and material of the physical SDH equipment, optical power meter, and optical attenuator in the photo, so that the resolution reaches 4096×4096. The Unity development engine in the first terminal device constructs an SDH equipment simulation model, an optical power meter, and an optical attenuator simulation model based on the point data and the recognized surface texture, pattern, color, and material of the physical SDH equipment, optical power meter, and optical attenuator, so that the size error of the physical SDH equipment is controlled within 1.5 mm, the insertion and removal stroke error of the SFP optical module is less than or equal to 0.3 mm, and the power switch trigger stroke pressing depth is less than or equal to 0. The error is within 0.1nm, which solves the problem of insufficient accuracy of the virtual SDH equipment simulation model, and realizes the dynamic change of port optical power by adjusting the speed of light particles through the Shader shader in the hybrid head-mounted display device; the gesture recognizer in the hybrid head-mounted display device is used to recognize the five-finger pinch gesture and translation gesture, so that students can use virtual gestures to grab the virtual optical power meter to measure the port optical power and use virtual gestures to grab the virtual optical attenuator meter to measure the port bit error rate, realizing real-time interaction with the virtual SDH equipment simulation model, and then completing the virtual SDH equipment troubleshooting through virtual gestures, thereby improving the students' practical operation ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a structural diagram of a virtual simulation teaching system based on SDH equipment provided by an embodiment of the present invention; Figure 2 yes Figure 1 A schematic diagram of a mixed reality head display device provided by the present invention displaying a virtual interface of a business process; Figure 3 yes Figure 1 A schematic diagram of a virtual interface showing a business process on a second terminal device. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0019] Example 1 Figure 1 This is a structural diagram of a virtual simulation teaching system based on SDH equipment provided by an embodiment of the present invention. Figure 1 The SDH equipment virtual simulation teaching system includes: a mixed reality head display device 1, an SDH equipment simulation device 2 and a data service device 3; the SDH equipment simulation device 2 is connected to the mixed reality head display device 1 by signal, and the mixed reality head display device 1 is connected to the data service device 3 by signal; the SDH equipment simulation device 2 is used to construct an SDH equipment simulation model, an optical power meter simulation model and an optical attenuator simulation model, and the SDH equipment simulation device 2 is also used to obtain real-time parameters of the network management system and map the real-time parameters to the SDH equipment simulation model. The SDH equipment simulation device 2 is also used to transmit the SDH equipment simulation model, the optical power meter simulation model and the optical attenuator simulation model to the mixed reality head display device 1. The mixed reality head-mounted display device is used to display a virtual SDH device simulation model, a virtual optical power meter simulation model, and a virtual optical attenuator simulation model. The data service device 3 is used to provide the mixed reality head-mounted display device with a video tutorial on the principles of the SDH device simulation model, a video tutorial on alarm handling, and documents; the mixed reality head-mounted display device 1 is used to display a virtual SDH device simulation model, a virtual optical power meter simulation model, and a virtual optical attenuator simulation model, and recognize the student's gestures, and measure the optical power of the port of the virtual SDH device simulation model according to the virtual optical power meter simulation model, and measure the bit error rate of the port of the virtual SDH device simulation model according to the virtual optical attenuator simulation model, to determine whether the virtual SDH device simulation model has a fault.

[0020] The physical SDH equipment uses Huawei's OptiX OSN 7500. Components include the physical SDH equipment's boards, ports, power modules, LED lights, and other devices. The SDH equipment simulation device 2 includes a FARO Focus S350 laser scanner 21 (single-point accuracy 0.02mm, point pitch 0.5mm), a first terminal device 22, and a data converter 20. The mixed reality headset 1 is an immersive interactive device that integrates virtual reality and augmented reality technologies. The first terminal device 22 includes Agisoft Metashape software and the Unity development engine. Agisoft Metashape software is used to identify the surface texture (resolution 4096×4096), pattern, color, and material of the physical SDH equipment, optical power meter, and optical attenuator in the photograph. Based on the point data and the identified surface texture, pattern, color, and material of the physical SDH equipment, optical power meter, and optical attenuator, simulation models of the SDH equipment, optical power meter, and optical attenuator are constructed.

[0021] The mixed reality head display device 11 includes a Hololens2 device, and the mixed reality head display device includes a shader, a Unity development engine and a gesture recognizer. The shader is used to adjust the speed of light particles, the Unity development engine is used to establish a virtual SDH device simulation model, and the gesture recognizer is used to recognize the student's five-finger pinch gesture, pan gesture, single-click gesture, thumb and index finger open gesture, palm push gesture and double-click gesture.

[0022] Real-time parameters include optical power, bit error rate, CPU load, transmission rate, latency, memory usage, temperature, bandwidth utilization, signal strength, packet loss rate, interface status, power supply voltage, link quality, protocol overhead, and cache usage. Power thresholds are less than -25dBm, and bit error rate thresholds are greater than 1E-6. Complex fault indicators include level 1, level 2, and level 3 fault indicators.

[0023] Specifically, before the students' virtual practice, the FARO Focus S350 laser scanner 21 collects point data of Huawei OptiX OSN7500 equipment, boards, ports, power modules, SFP optical modules and LED lights, with a single point accuracy of 0.02mm and a point distance of 0.5mm, and transmits the collected point data to the first terminal device 22. The first terminal device 22 is equipped with a high-definition camera, which takes photos of the OptiX OSN 7500 equipment from multiple angles and transmits the photos to the first terminal device 22. The Agisoft Metashape software identifies the surface texture, pattern, color, and material of the physical SDH equipment, optical power meter, and optical attenuator in the photo (resolution 4096×4096). The Unity development engine in the first terminal device 22 constructs SDH equipment simulation models, optical power meter simulation models, and optical attenuator simulation models based on the point data and the identified surface texture, pattern, color, and material of the physical SDH equipment, optical power meter, and optical attenuator (i.e., assembly constraints are established in Unity: the physical equipment rack dimensional error is controlled within ±1.5mm, the SFP optical module insertion and removal stroke error is less than or equal to 0.3mm, and the power switch trigger stroke is consistent with the physical equipment (pressing depth 2.5mm±0.1mm). The data converter 20 obtains real-time parameters from the network management system and maps the real-time parameters to the SDH equipment simulation model. The first terminal device 22 transmits the SDH equipment simulation model, optical power meter, and optical attenuator simulation model to the mixed reality head-mounted display device, and the Unity development engine in the mixed reality head-mounted display device constructs a virtual SDH equipment simulation model.

[0024] When the trainees start the virtual practice, they may click on the first-level fault, second-level fault or third-level fault in the mixed reality head-mounted display device 1. When the mixed reality head-mounted display device 1 receives the first-level fault instruction, the shader adjusts the speed of the light particles, so that the optical fiber material changes from transparency to turbidity (that is, the virtual line is interrupted); when the mixed reality head-mounted display device 1 receives the second-level fault instruction, the shader adjusts the speed of the light particles, and the color of the node parameter interface is red (that is, the node parameter error fault); when the mixed reality head-mounted display device 1 receives the third-level fault instruction, the shader adjusts the speed of the light particles, so that the virtual device hardware flashes red (that is, the virtual device fails); the trainees are unaware of the first-level fault, second-level fault and third-level fault and need to troubleshoot the fault.

[0025] First, the mixed reality head display device 1 recognizes the student's five-finger pinching gesture, and uses the virtual five-finger pinching gesture to grab the virtual optical power meter simulation model to measure the optical power of the virtual line port, and judges whether the virtual line has a breakpoint based on the optical power and the power threshold. When the optical power measured by the virtual optical power meter simulation model is less than the power threshold, it is determined that a breakpoint occurs in the virtual line; when the optical power measured by the virtual optical power meter simulation model is greater than or equal to the power threshold, it is determined that there is no breakpoint in the virtual line.

[0026] Secondly, when the mixed reality head-mounted display device 1 determines that there are no breakpoints in the virtual circuit, the gesture recognizer recognizes the student's five-finger open gesture, causing the mixed reality head-mounted display device 1 to display the virtual node parameter interface, and judges whether the node parameter is faulty based on the color of the virtual node parameter interface. When the node parameter interface is red, the node parameter is faulty, and when the node parameter interface is green, the node parameter is normal.

[0027] The mixed reality head-mounted display device 1 is also used to display the virtual device hardware when it is determined that the node parameters are normal. The gesture recognizer in the mixed reality head-mounted display device 1 recognizes the trainee's five-finger pinching gesture, so that the five-finger pinching gesture pinches the virtual optical attenuator simulation model to measure the bit error rate of the port of the virtual SDH device simulation model, and determines whether the virtual device hardware is faulty based on the bit error rate and the bit error rate threshold. When the bit error rate measured by the virtual optical attenuator is greater than the bit error rate threshold, the virtual device hardware is faulty; when the bit error rate measured by the virtual optical attenuator simulation model is less than or equal to the bit error rate threshold, the virtual device hardware is faulty.

[0028] When the mixed reality head-mounted display device 1 confirms that a virtual line fault occurs, the translation gesture is recognized, and the virtual line is moved by dragging the translation gesture to complete the repair of the virtual line breakpoint; when the mixed reality head-mounted display device 1 confirms that a node parameter fault occurs, the correct node parameters are displayed, and the trainee enters the correct node parameters through translation and single-click gestures to complete the node parameter fault repair; when the mixed reality head-mounted display device 1 confirms that a virtual device hardware fault occurs, the mixed reality head-mounted display device 1 is also used to recognize five-finger pinching and translation gestures to complete the replacement of the virtual device hardware.

[0029] In the present invention, the laser scanner 21 is used to collect point data of the physical SDH equipment, board, port, power module, SFP optical module and LED lamp, so that the single point accuracy reaches 0.02mm and the point pitch reaches 0.5mm. The Agisoft Metashape software recognizes the surface texture, pattern, color and material of the physical SDH equipment, optical power meter and optical attenuator in the photo, so that the resolution reaches 4096×4096. The Unity development engine in the first terminal device 22 constructs the SDH equipment simulation model, the optical power meter simulation model and the optical attenuator simulation model based on the point data and the recognized surface texture, pattern, color and material of the physical SDH equipment, optical power meter and optical attenuator, so that the size error of the physical SDH equipment is controlled within 1.5mm, the insertion and removal stroke error of the SFP optical module is less than or equal to 0.3mm, and the power switch trigger stroke button is pressed. The pressure depth error is within 0.1nm, which solves the problem of insufficient accuracy of the virtual SDH equipment simulation model, and realizes the dynamic change of port optical power by adjusting the light particle speed through the Shader shader in the hybrid head-mounted display device; the gesture recognizer in the hybrid head-mounted display device is used to recognize the five-finger pinch gesture and translation gesture, so that students can use virtual gestures to grab the virtual optical power meter to measure the port optical power and use virtual gestures to grab the virtual optical attenuator meter to measure the port bit error rate, realizing real-time interaction with the virtual SDH equipment simulation model, and then completing the virtual SDH equipment troubleshooting through virtual gestures, thereby improving the students' practical operation ability.

[0030] Example 2, See also Figure 1 Furthermore, based on the above embodiment, the mixed reality head display device 1 monitors the trainee's operation steps, the number of times the virtual optical power meter simulation model is used, and the processing time in real time during the process of troubleshooting and repairing a first-level fault, monitors the trainee's operation steps and processing time in real time during the process of troubleshooting and repairing a second-level fault, and monitors the trainee's operation steps, the number of times the virtual optical attenuator simulation model is used, and the processing time in real time during the process of troubleshooting and repairing a third-level fault, and transmits the trainee's operation steps, the number of times the virtual optical power meter simulation model is used, the number of times the virtual optical attenuator simulation model is used, and the processing time to the data service device 3; the data service device 3 determines the completeness of the trainee's operation steps, the number of times the virtual optical power meter simulation model is used, the number of times the virtual optical attenuator simulation model is used, and the processing time, and the data service device 3 is used to generate a scoring report based on the completeness of the trainee's operation steps, the number of times the virtual optical power meter simulation model is used, the number of times the virtual optical attenuator simulation model is used, and the timeout.

[0031] Among them, the data service device 3 includes a data processor 30, a data server 31, a media server 32 and a file server 33; the media server 32 provides a video tutorial on the principles of the SDH equipment simulation model and a video tutorial on alarm handling; the data server 31 is used to store scoring reports, user information and correct node parameters, and the file server 33 is used to provide documents on the principles of the SDH equipment simulation model and documents on alarm handling.

[0032] When the mixed reality head-mounted display device 1 transmits the trainee's operation steps, the number of times the virtual optical power meter simulation model is used, the number of times the virtual optical attenuator simulation model is used, and the treatment time to the data processor 30, the data processor 30 determines the completeness of the trainee's operation steps, the number of times the virtual optical power meter simulation model is used, the number of times the virtual optical attenuator simulation model is used, and the treatment time, and the data processor 30 generates a scoring report based on the completeness of the trainee's operation steps, the number of times the virtual optical power meter simulation model is used, the number of times the virtual optical attenuator simulation model is used, and the treatment time.

[0033] Example 3 Figure 2 yes Figure 1 A schematic diagram of a mixed reality head display device provided by the present invention displaying a virtual interface of a business process; Figure 3 yes Figure 1 Schematic diagram of the virtual interface of the second terminal device displaying the business process, see Figure 1-Figure 3 On the basis of the above embodiment, the virtual simulation teaching system based on SDH equipment includes: a second terminal device 4 and a router 5; the second terminal device 4 is signal-connected to the mixed reality head display device 1 and the first terminal device 22 respectively; the router 5 is signal-connected to the first terminal device 22 and the second terminal device 4 respectively; the second terminal device 4 is used to display the account login interface, and the second terminal device 4 is used to display the interface with student management, viewing learning progress, remote communication and large-screen display after the teacher enters the account; the second terminal device 4 is also used to display the interface of student information when the teacher clicks on student management, the second terminal device 4 is also used to display the interface of student training progress when the teacher clicks on viewing learning progress, the second terminal device 4 is also used to display the interface of remote call with the student when the teacher clicks on remote communication, and the second terminal device 4 is also used to display the interface of student training content when the teacher clicks on large-screen display.

[0034] like Figure 2As shown, the mixed reality head-mounted display device 1 displays a virtual account login interface. After the trainee enters the account, the mixed reality head-mounted display device 1 displays a virtual interface with principle learning, activation and debugging, alarm handling, virtual operation, trend data and analysis and evaluation; when the trainee clicks on the principle learning through a virtual gesture, the mixed reality head-mounted display device 1 displays the video tutorial and document of the SDH equipment principle; when the trainee clicks on the activation and debugging through a virtual gesture, the mixed reality head-mounted display device 1 displays the virtual interface of the SDH equipment simulation model operation; when the trainee clicks on the alarm handling through a virtual gesture, the mixed reality head-mounted display device 1 displays the video tutorial and document of the SDH equipment simulation model alarm handling; when the trainee clicks on the virtual operation through a virtual double-click gesture, the mixed reality head-mounted display device 1 displays a virtual interface with first-level faults, second-level faults and third-level faults; when the trainee clicks on the trend data through a virtual double-click gesture, the mixed reality head-mounted display device 1 displays the operation trend data of the virtual SDH equipment; when the trainee clicks on the analysis and evaluation through a virtual gesture, the mixed reality head-mounted display device 1 displays the virtual interface of the evaluation report.

[0035] The first fault is a virtual line break, the second fault is a virtual network management parameter error, and the third fault is a virtual hardware failure. The first terminal device 22 and the second terminal device 4 both include computers or mobile phones.

[0036] Currently, in the SDH equipment simulation teaching system, the data synchronization transmission time between the terminal equipment and the data processor is relatively long, resulting in distorted operation feedback.

[0037] For the above technical issues, see Figure 1 Furthermore, on the basis of the above embodiments, the mixed reality head display device 1 and the first terminal device 22 and the mixed reality head display device 1 and the second terminal device 4 are both connected by signal using the MQTT+Protobuf hybrid protocol; the mixed reality head display device 1 and the data processor 30 are connected by signal using the MQTT+Protobuf hybrid protocol.

[0038] In the present invention, the MQTT+Protobuf hybrid protocol is adopted to shorten the data transmission time and avoid operation feedback distortion.

[0039] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A virtual simulation teaching system based on SDH equipment, characterized in that: include: Mixed reality head-mounted display equipment, SDH equipment simulation device and data service device; The SDH device simulation device is signal-connected to the mixed reality head-mounted display device, and the mixed reality head-mounted display device is signal-connected to the data service device; The SDH device simulation device is used to construct an SDH device simulation model, an optical power meter simulation model, and an optical attenuator simulation model. The SDH device simulation device is also used to obtain real-time parameters of the network management system and map the real-time parameters to the SDH device simulation model. The SDH device simulation device is also used to transmit the SDH device simulation model, the optical power meter simulation model, and the optical attenuator simulation model to the mixed reality head-mounted display device, and the mixed reality head-mounted display device is used to display the virtual SDH device simulation model, the virtual optical power meter simulation model, and the virtual optical attenuator simulation model. The data service device is used to provide the mixed reality head-mounted display device with a video tutorial on the principles of the SDH device simulation model, a video tutorial on alarm handling, and documentation. The mixed reality head display device is used to display a virtual SDH device simulation model, a virtual optical power meter simulation model and a virtual optical attenuator simulation model, and recognize the student's gestures. It also measures the optical power of the port of the virtual SDH device simulation model according to the virtual optical power meter simulation model and the bit error rate of the port of the virtual SDH device simulation model according to the virtual optical attenuator simulation model, and determines whether the virtual SDH device simulation model has a fault.

2. The SDH equipment virtual simulation teaching system according to claim 1 is characterized in that: The SDH equipment simulation device includes a laser scanner, a first terminal device and a data converter; The laser scanner is signal-connected to the first terminal device, and the data converter is signal-connected to the first terminal device and the physical SDH device respectively; the first terminal device is signal-connected to the mixed reality head-mounted display device; the first terminal device is provided with a camera; the camera is signal-connected to the first terminal device; the mixed reality head-mounted display device is signal-connected to the data processor; The laser scanner is used to collect point data of physical SDH equipment, components, optical power meters, and optical attenuators, and transmit the collected point data to the first terminal device; the camera is used to take photos of the physical SDH equipment from multiple angles, and transmit the photographed photos to the first terminal device; the Agisoft Metashape software of the first terminal device is used to identify the surface texture, pattern, color, and material of the physical SDH equipment, optical power meter, and optical attenuator in the photos, and construct an SDH equipment simulation model, an optical power meter simulation model, and an optical attenuator simulation model based on the point data and the identified surface texture, pattern, color, and material of the physical SDH equipment, optical power meter, and optical attenuator; The data converter is used to obtain real-time parameters of the network management system and map the real-time parameters to the SDH equipment simulation model, and the first terminal device is also used to transmit the SDH equipment simulation model, the optical power meter simulation model and the optical attenuator simulation model to the mixed reality head display device.

3. The SDH equipment virtual simulation teaching system according to claim 1 is characterized in that: The mixed reality head display device includes a shader, a Unity development engine and a gesture recognizer. The shader is used to adjust the speed of light particles, the Unity development engine is used to establish a virtual SDH equipment simulation model, and the gesture recognizer is used to recognize the trainee's five-finger pinching gesture, translation gesture, single-click gesture, thumb and index finger open gesture, palm push gesture and double-click gesture.

4. The SDH equipment virtual simulation teaching system according to claim 1 is characterized in that: The mixed reality head-mounted display device is used to display a virtual SDH device simulation model and a virtual optical power meter simulation model when receiving a composite fault instruction sent by a trainee, and the mixed reality head-mounted display device is used to recognize the trainee's gesture, and measure the optical power of the port of the virtual SDH device simulation model according to the recognized trainee gesture and the virtual optical power meter simulation model to determine whether the virtual line has a breakpoint; the mixed reality head-mounted display device is used to determine whether the node parameters are faulty according to the color of the virtual node parameter interface when it is determined that the virtual line has no breakpoint; the mixed reality head-mounted display device is also used to measure the bit error rate of the port of the virtual SDH device simulation model according to the recognized trainee gesture and the virtual optical attenuator simulation model when it is determined that the node parameters are faulty, and determine whether the virtual device hardware is faulty according to the bit error rate and the bit error rate threshold.

5. The SDH equipment-based virtual simulation teaching system according to claim 4 is characterized in that: When the optical power measured by the virtual optical power meter simulation model is less than the power threshold, it is determined that a breakpoint occurs in the virtual line; when the optical power measured by the virtual optical power meter simulation model is greater than or equal to the power threshold, it is determined that there is no breakpoint in the virtual line; When the mixed reality head-mounted display device is used to determine that there are no breakpoints in the virtual line and the node parameter interface is red, the node parameter has a fault; when the node parameter interface is green, the node parameter has no fault; When the bit error rate measured by the virtual optical attenuator simulation model is greater than the bit error rate threshold, the virtual device hardware fails; when the bit error rate measured by the virtual optical attenuator simulation model is less than or equal to the bit error rate threshold, the virtual device hardware is not faulty.

6. The SDH equipment-based virtual simulation teaching system according to claim 4 is characterized in that: The composite fault instruction includes a first-level fault instruction, a second-level fault instruction, and a third-level fault instruction. The mixed reality head-mounted display device is further configured to adjust the speed of light particles upon receiving the first-level fault instruction, so that the optical fiber material changes from transparency to turbidity. The mixed reality head-mounted display device is further configured to recognize a translation gesture, so that the virtual line is dragged and moved using the translation gesture to complete the repair of the optical fiber break. When the mixed reality head-mounted display device receives a secondary fault instruction, it adjusts the light particle speed so that the color of the node parameter interface is red, and the mixed reality head-mounted display device is also used to display the correct node parameters, so that the trainee can input the correct node parameters through translation and single-click gestures to complete the node parameter fault repair; When the mixed reality head display device receives a third-level fault instruction, it adjusts the speed of light particles to make the virtual device hardware flash red, and the mixed reality head display device is also used to recognize five-finger pinch and pan gestures to complete the replacement of the virtual device hardware.

7. The SDH equipment-based virtual simulation teaching system according to claim 6 is characterized in that: The mixed reality head-mounted display device is also used to monitor the trainee's operating steps, the number of times the virtual optical power meter simulation model is used, and the handling time in real time during the process of troubleshooting and repairing a first-level fault, monitor the trainee's operating steps and the handling time in real time during the process of troubleshooting and repairing a second-level fault, and monitor the trainee's operating steps, the number of times the virtual optical attenuator simulation model is used, and the handling time in real time during the process of troubleshooting and repairing a third-level fault, and transmit the trainee's operating steps, the number of times the virtual optical power meter simulation model is used, the number of times the virtual optical attenuator simulation model is used, and the handling time to the data service device.

8. The virtual simulation teaching system based on SDH equipment according to claim 7 is characterized in that: The mixed reality head-mounted display device is further configured to display a virtual account login interface. After the trainee enters their account, the mixed reality head-mounted display device displays a virtual interface for principle learning, commissioning and debugging, alarm handling, virtual practice, trend data, and analysis and evaluation. The mixed reality head-mounted display device is further configured to display video tutorials and documentation on SDH equipment principles when the trainee clicks on the principle learning through a virtual gesture. The mixed reality head-mounted display device is further configured to display a virtual interface of an SDH equipment simulation model running when the trainee clicks on commissioning and debugging through a virtual gesture. The mixed reality head-mounted display device is further configured to display video tutorials and documentation on alarm handling of an SDH equipment simulation model when the trainee clicks on the alarm handling through a virtual gesture. The mixed reality head-mounted display device is also used to display a virtual interface with first-level faults, second-level faults and third-level faults when the trainee clicks on the virtual practice through virtual gestures; the mixed reality head-mounted display device is also used to display the operation trend data of the virtual SDH equipment when the trainee clicks on the trend data through virtual gestures; the mixed reality head-mounted display device is also used to display the virtual interface of the scoring report when the trainee clicks on the analysis and scoring through virtual gestures.

9. The virtual simulation teaching system based on SDH equipment according to claim 1 is characterized in that: The data service device includes a data processor, a data server, a media server and a file server; The data processor is respectively connected to the mixed reality head display device by signal; the data server, the media server and the file server are respectively connected to the data processor by signal; The data processor is used to determine the completeness of the trainee's operating steps, the number of times the virtual optical power meter simulation model is used, the number of times the virtual optical attenuator simulation model is used, and the handling time based on the operating steps monitored by the hybrid head-mounted display device, the number of times the virtual optical power meter simulation model is used, and the handling time. The data processor is also used to generate a scoring report based on the completeness of the trainee's operating steps, the number of times the tool is misused, and the timeout. The media server is used to provide video tutorials on the principles of the SDH equipment simulation model and video tutorials on alarm handling; the data server is used to store the scoring report, user information, and correct node parameters; and the file server is used to provide documents on the principles of the SDH equipment simulation model and documents on alarm handling.

10. The SDH equipment-based virtual simulation teaching system according to claim 1, characterized in that: Also includes: Second terminal device and router; The second terminal device is signal-connected to the mixed reality head-mounted display device and the first terminal device respectively; The router is signal-connected to the first terminal device and the second terminal device respectively; the second terminal device is used to display an account login interface, and the second terminal device is used to display an interface with student management, viewing learning progress, remote communication and large-screen display after the teacher enters the account; the second terminal device is also used to display an interface of student information when the teacher clicks on student management, and the second terminal device is also used to display an interface of student training progress when the teacher clicks on viewing learning progress. The second terminal device is also used to display an interface for remote calls with students when the teacher clicks on remote communication, and the second terminal device is also used to display an interface of student training content when the teacher clicks on large-screen display.

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