Three-dimensional laser scanning virtual simulation teaching system and equipment

Abstract

The invention relates to the technical field of surveying and mapping instrument teaching, in particular to a three-dimensional laser scanning virtual simulation teaching system and equipment, an environment simulation module obtains image information of a real scene and constructs an environment three-dimensional model corresponding to the real scene; the virtual instrument module obtains a virtual instrument model constructed according to a real instrument and a corresponding use rule; the simulation operation module can load an environment three-dimensional model, a virtual instrument model and a virtual character on a display picture, and control the virtual character according to a user instruction, so that the virtual character controls a virtual instrument to execute corresponding operation in a virtual environment; and the teaching scoring module scores the operation executed by the virtual character according to the use rule. According to the technical scheme, students can practice the use of instruments in a virtual three-dimensional environment, the immersion is strong, the authenticity is higher, meanwhile, the instruments needing teaching can be changed only by changing the virtual instrument model and the use rule, and the universality is strong.

Description

Technical Field

[0001] The present invention relates to the technical field of surveying and mapping instrument teaching, and particularly to a three-dimensional laser scanning virtual simulation teaching system and device. Background Art

[0002] In the current field of surveying and mapping instrument teaching, surveying and mapping instruments (such as three-dimensional laser scanners) are generally expensive, which causes great economic pressure on teaching units such as schools and training institutions when purchasing. It is difficult to purchase a large number to meet the needs of students' sufficient practical operations, resulting in a shortage of instrument supply and demand. Due to the lack of sufficient practical opportunities, students have a low level of proficiency and skills in operating three-dimensional laser scanners, and are unable to deeply understand the measurement principle and data acquisition process. In terms of the teaching environment, outdoor measurement practice teaching is extremely vulnerable to interference from bad weather. Not only can the practical courses not be carried out normally, but it may also pose a threat to the safety of students, making the teaching plan often interrupted or adjusted, and it is difficult to guarantee the coherence and integrity of teaching. Due to the complex school curriculum system and the compact arrangement of professional courses, it is often difficult to make a comprehensive and reasonable time allocation for measurement practice teaching.

[0003] With the development of educational technology, virtual simulation technology has gradually been applied to the teaching field, bringing new ideas to solve the above problems. However, there are still many deficiencies in the existing virtual simulation teaching systems. On the one hand, most systems only stay at the two-dimensional plane operation level, which is quite different from the three-dimensional operation scenarios in actual internships or work, and cannot provide students with a real and immersive operation experience. It is difficult for students to effectively connect virtual operations with actual applications. On the other hand, the existing virtual simulation teaching systems have poor versatility and often can only simulate teaching for specific types or models of three-dimensional laser scanners, unable to meet diverse teaching needs. When teaching different types or models of three-dimensional laser scanners, multiple independent systems need to be developed, which not only increases the development cost and maintenance difficulty, but also is not conducive to the integration and sharing of teaching resources.

[0004] In summary, the existing virtual simulation teaching of three-dimensional laser scanners has insufficient operation experience and poor versatility. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a three-dimensional laser scanning virtual simulation teaching system and device to solve the problems of insufficient operation experience and poor versatility in the virtual simulation teaching of three-dimensional laser scanners in the prior art.

[0006] According to the first aspect of the embodiments of the present invention, a three-dimensional laser scanning virtual simulation teaching system is provided, including:

[0007] An environmental simulation module, configured to obtain image information of a real scenario and construct a three-dimensional environmental model corresponding to the real scenario according to the image information;

[0008] A virtual instrument module, configured to obtain a virtual instrument model constructed based on a real instrument and obtain the usage rules corresponding to the virtual instrument model;

[0009] A simulation operation module, configured to load the three-dimensional environmental model, the virtual instrument model, and a virtual character on a display screen, and control the virtual character according to a user instruction, so that the virtual character controls the virtual instrument to perform corresponding operations in a virtual environment;

[0010] A teaching scoring module, configured to score the operations performed by the virtual character according to the usage rules.

[0011] Preferably, the usage rules corresponding to the virtual instrument model include: the steps when using the real instrument and the judgment conditions corresponding to each step;

[0012] When the teaching scoring module scores the operations performed by the virtual character, it further includes: when the virtual character performs an operation, determining whether the operation conforms to the judgment condition corresponding to the current step, and if so, adding points according to a preset scoring rule.

[0013] Preferably, the three-dimensional laser scanning virtual simulation teaching system further includes:

[0014] A cloud platform supervision module, configured to obtain the scoring results generated by the teaching scoring module, where the scoring results include the total score and the detailed breakdown of step-by-step points added.

[0015] Preferably, the three-dimensional laser scanning virtual simulation teaching system further includes:

[0016] An instrument learning module, configured to store learning materials corresponding to the real instrument and display the learning materials according to a user instruction.

[0017] Preferably, if the real instrument is a station-mounted three-dimensional laser scanning instrument, the steps are as follows:

[0018] On-site survey, install a tripod, fix the base, install the scanner, install the battery, power on, create a new project, set the application scenario, start scanning, complete circumferential scanning, view point cloud data, export data, and retrieve the scanner.

[0019] Preferably, if the real instrument is an airborne three-dimensional laser scanning instrument, the steps are as follows:

[0020] Instrument setup, static parameter setting, ground station startup, UAV wing installation, laser installation, battery installation, SD card output path setting, ground station connection, flight altitude setting, overlap rate setting, camera setting, terrain following flight, scan frequency setting, effective scan angle setting, effective survey area planning, route saving, route execution, static data export, instrument recovery.

[0021] Preferably, if the real instrument is a vehicle-mounted three-dimensional laser scanning instrument, the steps are as follows:

[0022] Route planning, startup of the reference station, setting of static acquisition, installation of the bracket, installation of the base, installation of the surveying instrument, installation of the panoramic camera, installation of the antenna, removal of the laser protection cover, power on, WIFI on, WIFI connection to the surveying instrument, system mode selection of vehicle-mounted, connection to the positioning and orientation system, connection to the laser, scan start angle, scan end angle, scan frequency, setting of the line scan speed, confirmation of laser parameter setting, connection to the panoramic camera, setting of the baud rate, GPS in the menu bar, data acquisition, start of taking pictures, start of automatic driving, completion of route planning, download of positioning and orientation system data, download of laser scanner data, software shutdown of the scanner, shutdown of the physical power supply, disassembly of the instrument, export of RTK data.

[0023] Preferably, the environment simulation module, when constructing the environmental three-dimensional model, further includes:

[0024] According to the image information of the real scene, the real scene is decomposed into multiple scene types, and each scene type is independently modeled, so that each scene type has independent geometric bodies, materials and textures;

[0025] All the scene types are integrated into the environmental three-dimensional model, and lighting is set in the environmental three-dimensional model.

[0026] According to the second aspect of the embodiments of the present invention, a three-dimensional laser scanning virtual simulation teaching device is provided, and the three-dimensional laser scanning virtual simulation teaching device can run the three-dimensional laser scanning virtual simulation teaching system described in any one of the above.

[0027] The technical solutions provided by the embodiments of the present invention may include the following beneficial effects:

[0028] It can be understood that the technical solution shown in the present invention can obtain the image information of the real scene through the environment simulation module, and construct the environmental three-dimensional model corresponding to the real scene; the virtual instrument module obtains the virtual instrument model constructed according to the real instrument and its corresponding usage rules; the simulation operation module can load the environmental three-dimensional model, virtual instrument model and virtual character on the display screen, and control the virtual character according to the user's instructions so that it controls the virtual instrument to perform corresponding operations in the virtual environment; the teaching scoring module scores the operations performed by the virtual character according to the usage rules. The technical solution shown in the present invention enables students to practice the use of instruments in a virtual three-dimensional environment, with a strong sense of immersion and greater authenticity. At the same time, only by changing the virtual instrument model and usage rules, it is possible to change the instruments and work processes to be taught, with strong versatility. It is also possible to change the environmental three-dimensional model and virtual character to correspond to the work sites of different instruments.

[0029] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and do not limit the present invention. Brief Description of the Drawings

[0030] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present invention, and are used together with the specification to explain the principles of the present invention.

[0031] Figure 1 is a schematic block diagram of a three-dimensional laser scanning virtual simulation teaching system shown according to an exemplary embodiment;

[0032] Figure 2 is a schematic diagram of actual operation in a virtual scene shown according to an exemplary embodiment;

[0033] Figure 3 is a schematic diagram of virtual instrument installation shown according to an exemplary embodiment. Detailed Description of the Embodiments

[0034] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. On the contrary, they are only examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0035] In one embodiment, Figure 1 is a schematic block diagram of a three-dimensional laser scanning virtual simulation teaching system shown according to an exemplary embodiment. Refer to Figure 1 , a three-dimensional laser scanning virtual simulation teaching system is provided, including:

[0036] The environmental simulation module 10 is used to obtain the image information of the real scene and construct a three-dimensional environmental model corresponding to the real scene according to the image information.

[0037] The virtual instrument module 20 is used to obtain a virtual instrument model constructed according to a real instrument and obtain the usage rules corresponding to the virtual instrument model.

[0038] The simulation operation module 30 is used to load the three-dimensional environmental model, the virtual instrument model and virtual characters on the display screen, and control the virtual characters according to user instructions, so that the virtual characters control the virtual instrument to perform corresponding operations in the virtual environment.

[0039] The teaching scoring module 40 is used to score the operations performed by the virtual characters according to the usage rules.

[0040] It can be understood that the technical solution shown in this embodiment can obtain the image information of the real scene through the environmental simulation module and construct a three-dimensional environmental model corresponding to the real scene; the virtual instrument module obtains a virtual instrument model constructed according to a real instrument and its corresponding usage rules; the simulation operation module can load the three-dimensional environmental model, the virtual instrument model and virtual characters on the display screen, and control the virtual characters according to user instructions, so that they control the virtual instrument to perform corresponding operations in the virtual environment; the teaching scoring module scores the operations performed by the virtual characters according to the usage rules. The technical solution shown in this embodiment enables students to practice the use of instruments in a virtual three-dimensional environment, with a strong sense of immersion and greater authenticity. At the same time, only by changing the virtual instrument model and usage rules, it is possible to change the instruments to be taught, and it has strong versatility.

[0041] In specific practice, when the environmental simulation module 10 constructs the three-dimensional environmental model, it needs to first obtain the oblique photography three-dimensional model of the real scene to build the virtual scene. The process is as follows: Use a drone or other flying platform to carry a multi-angle camera to take pictures of an object from multiple angles, so as to obtain the image information of the object. Subsequently, with the help of image processing software, these multi-angle images are matched and spliced to generate a three-dimensional model, which can truly reflect the details such as the color and texture of the object. Finally, the modeling engineer uses three-dimensional modeling tools to process the three-dimensional model generated by oblique photography and outputs a virtual scene that restores the real scene 1:1.

[0042] In a preferred embodiment, when the environmental simulation module constructs the three-dimensional environmental model, it further includes:

[0043] According to the image information of the real scene, the real scene is decomposed into multiple scene types, and each scene type is independently modeled so that each scene type has independent geometries, materials, and textures. All the scene types are integrated into an environmental 3D model, and lighting is set in the environmental 3D model. At the same time, when making large elements such as terrain and buildings, ensure that the scene is in a 1:1 ratio with the reality to enhance the immersion. Attention should also be paid to adding detailed elements, such as vegetation, roads, traffic signs, manhole covers, street lights, and other elements.

[0044] In terms of scene optimization, use PBR physical materials, reduce the use of ordinary materials, and increase the aesthetic feeling and details of the scene. Utilize the LOD technology to dynamically adjust the object details according to the distance between the character and the object, reducing the rendering pressure. Reasonably set the lighting to enhance the realism and three-dimensional sense of the scene. In addition, appropriate sound effects and atmosphere elements can be added to enhance the immersion of the scene. Carry out detailed processing on each element in the scene to ensure the overall effect is harmonious and unified.

[0045] For the virtual instrument module 20 in constructing a three-dimensional virtual instrument model, the modeling engineer disassembles a real instrument (such as a laser scanner) and combines it with the design drawings to construct a three-dimensional virtual instrument model at a 1:1 ratio. The operating system built into the virtual instrument model also needs to be the same as that of the real instrument.

[0046] At the same time, each real instrument has its corresponding usage rules, and the usage rules of the virtual instrument model constructed based on the real instrument are the same as those of the real instrument.

[0047] The simulation operation module 30 is used to load the environmental 3D model, the virtual instrument model, and the virtual character on the display screen, and control the virtual character according to the user's instructions, so that the virtual character controls the virtual instrument to perform corresponding operations in the virtual environment, see Figure 2 and Figure 3 . When the user starts the virtual simulation teaching system and enters the learning scene of a specific 3D laser scanner, the corresponding environmental 3D model will be quickly called, the module will load the corresponding virtual instrument model, and the virtual character will also appear in the picture, and its appearance and actions have certain anthropomorphic characteristics. The user uses input devices such as a mouse and a keyboard to issue instructions, and the virtual character will perform corresponding actions according to the instructions, such as taking out the instrument from the backpack and installing the instrument.

[0048] The teaching scoring module 40 can score the operations performed by the virtual character during the process of the user operating the virtual character to use the instrument.

[0049] In a preferred embodiment, the usage rules corresponding to the virtual instrument model include: the steps when using the real instrument, and the judgment conditions corresponding to each step.

[0050] When the teaching scoring module scores the operations performed by the virtual character, it further includes: when the virtual character performs an operation, determining whether the operation meets the judgment conditions corresponding to the current step, and if so, adding points according to the preset scoring rules.

[0051] For example, when using a tripod-mounted 3D laser scanning instrument, its usage steps at least include installing the tripod, fixing the base, and installing the scanner. When the user operates the virtual character to install the tripod, it can be determined whether the installation is correct according to the judgment conditions, and then this step is scored. Similarly, the operations of fixing the base and installing the scanner will also be scored in turn.

[0052] In a preferred embodiment, the 3D laser scanning virtual simulation teaching system further includes:

[0053] A cloud platform supervision module, which is used to obtain the scoring results generated by the teaching scoring module, and the scoring results include the total score and the breakdown of step-by-step points added.

[0054] In specific practice, teachers can log in to the cloud platform supervision module to view the scoring results of multiple students. At the same time, the scoring results include the total score and the breakdown of step-by-step points added, so that it can be seen which steps are perfectly completed and which steps are not done well.

[0055] An instrument learning module, which is used to store the learning materials corresponding to the real instrument and display the learning materials according to the user's instructions.

[0056] In specific practice, users can learn about the real instrument from this system, and the learning materials include video materials or document materials.

[0057] It may further include a simulation usage module, which is similar to the function of the simulation operation module, but this module can display the steps in real time on the display screen when using the instrument. When the user completes a step, a tick will be marked in this step so that the user can understand the specific completion situation of this step.

[0058] In practical applications, if the real instrument is a tripod-mounted 3D laser scanning instrument, the steps and judgment conditions are as follows in sequence:

[0059] Field reconnaissance; Judgment condition: After selecting points on the map to form a survey area, walk a certain distance within the survey area and observe the survey area.

[0060] Install the tripod; Judgment condition: Take out the tripod from the backpack and place it on the ground.

[0061] Fix the base; Judgment condition: Take out the base chassis from the backpack and place it on the tripod.

[0062] Install the scanner; Judgment condition: Take out the 3D laser scanner from the backpack and place it on the base chassis.

[0063] Install the battery; Judgment condition: Aim the view at the 3D laser scanner, press the preset key to enter the scanner operation mode, rotate the view to the back of the scanner, click the battery back cover of the scanner to open it, and click the button on the right to install each component such as the battery.

[0064] Power on; Judgment condition: Long press the power on button to power on in the scanner operation mode.

[0065] Create a new project; Judgment condition: In the scanner interface, click to enter the system settings interface, enter the project list, click to create a new project, input various parameters and save to create a new project.

[0066] Set the application scenario; Judgment condition: In the parameter settings interface, set various parameters.

[0067] Start scanning; Judgment condition: Return to the home page, click the start scanning button, and wait for the scanning to complete. During this process, depending on the device configuration, there will be varying degrees of lag in the scanning point spacing and distance. If it gets stuck for a long time, please appropriately increase the point spacing and reduce the scanning distance.

[0068] Completion of circumferential scanning; Judgment condition: Surround one or more buildings in the survey area and repeat the scanning multiple times until the scanning of the buildings in the survey area is completed.

[0069] View point cloud data; Judgment condition: Enter the file preview interface to view the scanned point cloud file.

[0070] Data export; Judgment condition: In the file preview interface, select the point cloud data (or turn on the multi - select switch in the upper right corner and select multiple point cloud data), long press until a pop - up window appears, click the "Copy to USB flash drive" button in the pop - up window, select the export path, and export the data.

[0071] Recover the scanner; Judgment condition: Exit the operation interface, aim at the instrument, press R (preset key) to pick it up, and then press X (preset key) to recover it into the backpack.

[0072] In practical applications, if the real instrument is an airborne 3D laser scanning instrument, the steps and judgment conditions are as follows:

[0073] Instrument erection; Judgment condition: Correctly place the tripod, height measuring piece, connecting rod, RTK, and antenna.

[0074] Static parameter setting; Judgment condition: (1) Power on the reference station; (2) Open the handset; (3) Connect the instrument; (4) Static acquisition setting, set the acquisition interval to 0.5, and set the instrument height.

[0075] The ground station is powered on; Judgment condition: Take out the ground station and power it on.

[0076] The drone wings are installed; Judgment condition: Unfold all the wings.

[0077] The laser is installed; Judgment condition: Install all components of the 3D laser and remove the laser cover.

[0078] The battery is installed; Judgment condition: Install six batteries.

[0079] The output path of the SD card is set; Judgment condition: Click the POS button and select the point cloud output path.

[0080] The ground station is connected; Judgment condition: The ground station is connected to the drone.

[0081] The flight altitude is set; Judgment condition: The flight altitude of the aircraft is greater than 150m.

[0082] The overlap rate is set; Judgment condition: Set the photo overlap rate of the aerial photography, including the forward and side overlap rates (75 - 80).

[0083] The camera is set; Judgment condition: Select the SAL-150 35mm camera.

[0084] Terrain-following flight; Judgment condition: Turn on the terrain-following flight.

[0085] The scanning frequency is set; Judgment condition: Select the scanning frequency (when the ground height ≤ 150m, frequencies of 600kHz and lower can be selected; when the ground height ≤ 300m, frequencies of 400kHz and lower can be selected; when the ground height ≤ 500m, frequencies of 200kHz and lower can be selected; when the ground height ≤ 700m, frequencies of 100kHz and lower can be selected).

[0086] The effective scanning angle is set; Judgment condition: Set the effective scanning angle (90).

[0087] The effective survey area is planned; Judgment condition: The flight line survey area covers 70% of the task survey area.

[0088] The flight line is saved; Judgment condition: Enter the flight line name and save it.

[0089] The flight line is executed; Judgment condition: The drone executes the entire flight line.

[0090] The static data is exported; Judgment condition: Turn off the static acquisition and export the static data.

[0091] The instruments are recovered; Judgment condition: Recover the instruments in sequence (recover the laser and camera in the shutdown state).

[0092] In practical applications, if the real instrument is a vehicle-mounted 3D laser scanning instrument, the steps and judgment conditions are as follows:

[0093] Plan the route; Judgment condition: Open the large map, right-click on the road on the map to plan the route, and confirm the driving plan.

[0094] Power on the reference station; Judgment condition: The reference station is powered on.

[0095] Set static acquisition; Judgment condition: The tablet sets static power on and starts collecting data.

[0096] Install the bracket; Judgment condition: Click to install the bracket.

[0097] Install the base; Judgment condition: Click to install the base.

[0098] Install the surveying and mapping instrument R100; Judgment condition: Click to install the surveying and mapping instrument R100.

[0099] Install the panoramic camera; Judgment condition: Click to install the panoramic camera.

[0100] Install the antenna; Judgment condition: Click to install the antenna.

[0101] Remove the laser protection cover; Judgment condition: Click the laser protection cover to remove the laser protection cover.

[0102] Turn on the power; Judgment condition: Click the power to turn on the power.

[0103] Turn on WIFI; Judgment condition: Press F (preset key position) to enter the car, turn on the computer, and turn on the wifi.

[0104] WIFI connect to the surveying and mapping instrument R100; Judgment condition: Click to connect to the surveying and mapping instrument R100.

[0105] Select the vehicle-mounted system mode; Judgment condition: Open the 3D laser control software and select the vehicle-mounted mode.

[0106] Connect to the POS; Judgment condition: The 3D laser control software connects to the POS (positioning and orientation system).

[0107] Connect to the laser; Judgment condition: The 3D laser control software connects to the laser.

[0108] Set the scanning start angle; Judgment condition: Set the scanning start angle to 15°.

[0109] Set the scanning end angle; Judgment condition: Set the scanning end angle to 345°.

[0110] Set the scanning frequency; Judgment condition: Set the scanning frequency to 820KZ.

[0111] Set the line scan speed; Judgment condition: Set the line scan speed to 200.

[0112] Confirm the laser parameter settings; Judgment condition: Click Confirm to set the laser parameters.

[0113] Connect the panoramic camera; Judgment condition: Open the panoramic camera control software and connect the panoramic camera.

[0114] Set the baud rate; Judgment condition: Set the baud rate to 115200.

[0115] Menu bar GPS; Judgment condition: Start GPS Time Sync in the Menu bar setting.

[0116] Data acquisition; Judgment condition: Set the pulse width to 10 and start data recording.

[0117] Start taking pictures; Judgment condition: Open the 3D laser control software to start taking pictures.

[0118] Autopilot; Judgment condition: Click Autopilot.

[0119] Complete the planned route; Judgment condition: The vehicle completes the planned route in autopilot.

[0120] Download POS data; Judgment condition: Open the 3D laser control software to download POS data.

[0121] Download laser scanner data; Judgment condition: Open the 3D laser control software to download laser scanner data.

[0122] Software to turn off the scanner; Judgment condition: Turn off the scanner through the software.

[0123] Turn off the physical power; Judgment condition: Click the power button to turn off the power.

[0124] Disassemble the instrument; Judgment condition: Recycle all the assembled instruments.

[0125] Export RTK data; Judgment condition: Close the static acquisition, enter the base station perspective, and export RTK data.

[0126] It can be understood that the technical solution shown in the present invention, based on the virtualization of the Unity 3D engine, better meets the requirements of today's technological development. It is not only limited to learning the theoretical knowledge of instrument operation. Users can experience all the processes of instrument operation immersively and complete the real operation on the virtual platform.

[0127] The virtual simulation training software has stronger interactivity, more vivid and interesting display effects. It can save teaching consumables more through simulation, make high-risk teaching experiments safer, and at the same time provide classroom implementation solutions that cannot be carried out in reality. It solves the "three highs and three difficulties" pain points and difficulties in the process of training teaching, namely high investment, high loss, high risk, difficult implementation, difficult observation, and difficult reproduction.

[0128] According to a second aspect of an embodiment of the present invention, there is provided a three-dimensional laser scanning virtual simulation teaching device, and the three-dimensional laser scanning virtual simulation teaching device can run the three-dimensional laser scanning virtual simulation teaching system described in any one of the above.

[0129] It can be understood that the same or similar parts in the above embodiments can be referred to each other, and the content not described in detail in some embodiments can be seen in the same or similar content in other embodiments.

[0130] It should be noted that in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "a plurality of" refers to at least two.

[0131] Any process or method description in the flowchart or described in other ways herein can be understood as representing a module, segment, or part of code including one or more executable instructions for implementing a specific logical function or process. The scope of the preferred embodiments of the present invention includes additional implementations, where the functions can be executed in a substantially simultaneous manner or in an order opposite to that shown or discussed, according to the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention belong.

[0132] It should be understood that each part of the present invention can be implemented by hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, any one or a combination of the following well-known technologies in the art can be used: discrete logic circuits having logic gate circuits for implementing logical functions on data signals, application specific integrated circuits having appropriate combinational logic gate circuits, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

[0133] Those of ordinary skill in the art in this technical field can understand that all or part of the steps carried by the methods in the above embodiments can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiments.

[0134] In addition, each functional unit in various embodiments of the present invention may be integrated into a processing module, may exist physically alone for each unit, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. When the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0135] The above-mentioned storage medium may be a read-only memory, a magnetic disk, an optical disk, or the like.

[0136] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0137] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A three-dimensional laser scanning virtual simulation teaching system, characterized in that: include: An environment simulation module is used to obtain image information of a real scene and construct a three-dimensional model of the environment corresponding to the real scene based on the image information; A virtual instrument module, used to obtain a virtual instrument model constructed according to a real instrument, and obtain usage rules corresponding to the virtual instrument model; A simulation operation module, used for loading the three-dimensional model of the environment, the virtual instrument model and the virtual character on the display screen, and controlling the virtual character according to user instructions so that the virtual character controls the virtual instrument to perform corresponding operations in the virtual environment; The teaching scoring module is used to score the operations performed by the virtual character according to the usage rules.

2. The three-dimensional laser scanning virtual simulation teaching system according to claim 1 is characterized in that: The usage rules corresponding to the virtual instrument model include: steps when using a real instrument, and the judgment conditions corresponding to each step; When the teaching scoring module scores the operation performed by the virtual character, it also includes: when the virtual character performs the operation, judging whether the operation meets the judgment condition corresponding to the current step, and if so, adding points according to the preset scoring rules.

3. The three-dimensional laser scanning virtual simulation teaching system according to claim 2 is characterized in that: Also includes: The cloud platform supervision module is used to obtain the scoring results generated by the teaching scoring module, and the scoring results include the total score and the step-by-step scoring details.

4. The three-dimensional laser scanning virtual simulation teaching system according to claim 1 is characterized in that: Also includes: The instrument learning module is used to store learning materials corresponding to real instruments and display the learning materials according to user instructions.

5. The three-dimensional laser scanning virtual simulation teaching system according to claim 2 is characterized in that: If the real instrument is a stand-type three-dimensional laser scanning instrument, the steps are as follows: On-site survey, tripod installation, base fixation, scanner installation, battery installation, power on, new project creation, application scenario setting, scanning start, surround scanning completion, point cloud data viewing, data export, scanner recovery.

6. The three-dimensional laser scanning virtual simulation teaching system according to claim 2 is characterized in that: If the real instrument is an airborne three-dimensional laser scanning instrument, the steps are as follows: Instrument installation, static parameter setting, ground station startup, drone wing installation, laser installation, battery installation, SD card output path setting, ground station connection, flight altitude setting, overlap rate setting, camera setting, terrain simulation flight, scanning frequency setting, effective scanning angle setting, effective survey area planning, route saving, route execution, static data export, instrument recovery.

7. The three-dimensional laser scanning virtual simulation teaching system according to claim 2, characterized in that: If the real instrument is a vehicle-mounted three-dimensional laser scanning instrument, the steps are as follows: Plan the route, turn on the base station, set up static collection, install the bracket, install the base, install the surveyor, install the panoramic camera, install the antenna, remove the laser protection cover, turn on the power, turn on WIFI, connect WIFI to the surveyor, select vehicle-mounted system mode, connect the positioning and orientation system, connect the laser, scan the starting angle, scan the cut-off angle, scan the frequency, set the line scan speed, confirm the laser parameter settings, connect the panoramic camera, set the baud rate, menu bar GPS, data collection, start taking pictures, start automatic driving, complete the planned route, download the positioning and orientation system data, download the laser scanner data, shut down the scanner with software, turn off the physical power, disassemble the instrument, and export RTK data.

8. The three-dimensional laser scanning virtual simulation teaching system according to claim 1, characterized in that: The environment simulation module, when building the three-dimensional model of the environment, also includes: According to the image information of the real scene, the real scene is decomposed into multiple scene types, and each scene type is independently modeled so that each scene type has independent geometry, materials and textures; All scene types are integrated into an environmental 3D model, and lighting is set in the environmental 3D model.

9. A three-dimensional laser scanning virtual simulation teaching device, characterized in that: The three-dimensional laser scanning virtual simulation teaching device can run the three-dimensional laser scanning virtual simulation teaching system as described in any one of claims 1 to 8.

Images