CN107657841A - A kind of CAD instructional devices and system based on line holographic projections - Google Patents

Abstract

The present invention relates to the technical field of teaching systems, more specifically, to a CAD teaching device and system based on holographic projection, including a box, a pyramid display screen inside the box, and a main computer for displaying content to be holographically projected. Display screen, the main display screen is arranged directly above the pyramid display screen, the center of the main display screen coincides with the pyramid of the pyramid display screen, and the bottom surface of the pyramid display screen is horizontally arranged with the main screen . The present invention presents the shape of the CAD three-dimensional model in front of students through hardware design and software design, and can move, zoom in and out of the model, making the learning content more practical and interesting, and can effectively arouse students' enthusiasm for learning , improve the learning effect; the structure is simple, the manufacturing cost is low, and it is easy to move and the height is easy to adjust, which is applicable to different teaching environments and has good universality.

Description

A CAD teaching device and system based on holographic projection

technical field

The present invention relates to the technical field of teaching systems, and more specifically, to a CAD teaching device and system based on holographic projection.

Background technique

At present, in domestic vocational colleges, most engineering majors require students to have good three-dimensional space imagination ability, such as CAD teaching and 3D modeling for electromechanical majors, and product design for industrial design majors. However, the traditional teaching method using multimedia is difficult to reflect the real three-dimensional mechanical structure, and students' cognitive senses can only stagnate on the two-dimensional plane. Although the 3D model in CAD also has a 3D solid effect, it essentially shows a plane, and students cannot observe the structural features of the model from multiple angles at the same time. Therefore, the difficulty of learning will increase, and the interest in learning will gradually decrease, causing students to lose confidence in learning.

Holographic projection technology can produce three-dimensional aerial phantoms, and can also make phantoms interact with performers, with shocking three-dimensional visual effects, bright colors, high contrast, and high definition. However, holographic projection technology has not been applied to the field of classroom teaching, and 3D teaching courseware materials are seriously insufficient. The traditional projection playback content is to convert videos or pictures into 3D materials through specific professional software. This method has cumbersome manufacturing process and high cost. High, playback process solidification and other defects.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a CAD teaching device and system based on holographic projection, which presents the CAD model in front of the students in a three-dimensional form, making the teaching content more practical, interesting, and effective. To arouse students' enthusiasm for learning and improve learning results.

In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:

A CAD teaching device based on holographic projection is provided, comprising a box body, a pyramid display screen arranged in the box body, and a main display screen for displaying content to be holographic projection, the main display screen being arranged on the pyramid display screen Directly above, the center of the main display screen coincides with the apex of the pyramid display screen, and the bottom surface of the pyramid display screen is arranged horizontally with the main display screen.

In the CAD teaching device based on holographic projection of the present invention, the pyramid display screen uses the principle of interference and diffraction to record and reproduce the real three-dimensional image of the object, and the main function of the main display screen is to display the content to be holographic projection. When teaching, set up the main display screen above the pyramid display screen, keep the bottom surface of the pyramid display screen level with the main display screen, adjust the center of the main display screen to coincide with the pyramids of the pyramid display screen, and the four views on the main display screen Corresponding to the four facets of the pyramid display screen, since the view files are distributed on the front, back, left and right sides of the image at the same time, the four sides are simultaneously projected to form a 360-degree stereoscopic effect. The light source of the image is projected from the main display screen, which produces diffraction and reflection on the side of the pyramid on the pyramid display screen, and shoots into the eyes of the observer. The optics reflected from each side just constitute different sides of the three-dimensional image. See the different sides of the three-dimensional image; present the complex and abstract model structure in front of the students in a visualized form, making the learning content more practical and interesting, which can effectively arouse students' enthusiasm for learning and improve the learning effect.

Further, a touch control screen is provided on the box body, and the touch control screen is connected to the box body by turning over; the angle range of the touch control screen turning over relative to the top surface of the box body is 0°~90°. The setting that the touch control screen can be flipped relative to the cabinet allows the speaker to choose a suitable angle to watch, improving the user's comfort experience.

Further, a telescopic bracket for adjusting the height of the teaching device is provided under the box body, and the bracket is detachably connected with the box body. Such setting can adjust the height of the CAD teaching device, making it suitable for different teaching environments.

Further, the box body is also provided with a touch panel and function keys for sending instructions to the main display screen. The function keys include moving direction keys, zoom in and out keys, on/off keys, etc., which are convenient for the lecturer to zoom in, zoom out, and rotate the view image according to the teaching needs, which can increase students' understanding of the 3D CAD model and improve the teaching effect of the 3D CAD model.

Further, the box is also provided with a host computer for processing CAD three-dimensional model information and performing interactive control, and the main display screen, touch control screen, touch panel and function keys are all interactively and electrically connected with the host computer. The host computer is used to process the CAD 3D model information and display the corresponding view on the computer display screen. At the same time, it can perform interactive control and various adjustment functions, including zoom in and out, rotation, brightness contrast of the display device and other adjustment functions.

Further, the box body is a transparent rectangular frame box body, and the bottom surface of the pyramid display screen coincides with the bottom surface of the box body; the main display screen is congruent with the bottom surface of the pyramid display screen The box is slidingly connected. The main display screen is erected on the top of the pyramid display with the screen facing down. Slide up and down to adjust the center of the main display to coincide with the top vertex of the pyramid display. It is easy to operate and fixed firmly to prevent the pyramid display from being shaken during transportation. damage to the primary display.

The present invention also provides a CAD teaching system based on holographic projection and its teaching method, including a modeling module for establishing a CAD teaching model and performing material rendering and inversion processing, and a tool for converting the CAD teaching model into a three-dimensional animation. The animation conversion module and the display module for displaying the holographic projection, the modeling module, the animation conversion module and the display module are sequentially connected by communication.

Preferably, the modeling module is a combination of one or more of 3D Max modeling module, Maya modeling module and Pro/E modeling module.

The CAD teaching system based on holographic projection of the present invention uses the modeling module to model the mechanical mechanism of CAD teaching by the modeling module, and performs material rendering and inversion processing, so as to improve the authenticity and expressiveness of the mechanical structure of CAD teaching ;In order to cooperate with the CAD teaching system, the CAD teaching model should have real-time interactivity during the holographic projection display, and the CAD teaching model is converted into a 3D animation through the animation conversion module to endow the teaching model with real-time interactivity; finally, the 3D animation is displayed in holographic projection . Use the existing CAD software to build a model, then build a relay software, import the model into the software, and then generate a 3D animation that can control the transformation process, which not only greatly saves manpower, material resources and time, but also greatly improves the holographic projection and classroom teaching. compatibility.

The present invention is based on the teaching method of the CAD teaching system of holographic projection, comprising the following steps:

S1. Model the mechanical mechanism of CAD teaching through the modeling module, and perform material rendering and inversion processing;

S2. After step S1, the CAD teaching model is converted into a three-dimensional animation by the animation transformation module;

S3. After step S2, the 3D animation is displayed through holographic projection through the display module.

Through the above steps, when the teacher needs to explain a certain view of the model, he can first stop the rotation of the model, and then rotate the model to make it present a left view, or select a view from any angle in this way; Adjust the size, position, and clarity of the image to display a holographic file with good overall quality.

Compared with prior art, the beneficial effect of the present invention is:

(1) The present invention presents the shape of the CAD three-dimensional model in front of the students, and can move the model, zoom in and out, etc., so that the learning content is more practical and interesting, and can effectively arouse students' enthusiasm for learning and improve the learning effect .

(2) The CAD teaching device based on holographic projection is simple in structure, low in manufacturing cost, easy to move, easy to adjust in height, applicable to different teaching environments, and has good universality.

(3) The CAD teaching system based on holographic projection can use the model established by the existing CAD software to generate a 3D animation that can control the transformation process, which saves manpower and material resources, improves the compatibility of holographic projection and classroom teaching, and makes holographic projection unique. Great practicality.

Description of drawings

FIG. 1 is a schematic structural diagram of a CAD teaching device based on holographic projection according to the present invention.

Fig. 2 is a flow chart of the CAD teaching method based on holographic projection.

Detailed ways

The present invention will be further described below in combination with specific embodiments. Wherein, the accompanying drawings are only for illustrative purposes, showing only schematic diagrams, rather than physical drawings, and should not be construed as limitations on this patent; in order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings will be omitted, Enlargement or reduction does not represent the size of the actual product; for those skilled in the art, it is understandable that certain known structures and their descriptions in the drawings may be omitted.

In the drawings of the embodiments of the present invention, the same or similar symbols correspond to the same or similar components; The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, use a specific Orientation structure and operation, therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes, and should not be construed as limitations on this patent. Those of ordinary skill in the art can understand the specific meanings of the above terms according to specific situations.

Embodiment one

As shown in Figure 1, it is the first embodiment of the CAD teaching device based on holographic projection of the present invention, including a box body 1, a pyramid display screen 2 arranged in the box body and a main display screen 3 for displaying content to be holographic projection , the main display screen 3 is arranged directly above the pyramid display screen 2, the center of the main display screen 3 coincides with the apex of the pyramid display screen 2, and the bottom surface of the pyramid display screen 2 is set horizontally with the main display screen 3; the complex and abstract model The structure is presented in front of students in a visual form, making the learning content more practical and interesting, which can effectively arouse students' enthusiasm for learning and improve learning effects.

Among them, there is a touch control panel 4 on the box body 1, and the touch control panel 4 is turned over and connected with the box body 1; the angle range of the touch control panel 4 turning over with respect to the top surface of the box body 1 is 0°~90°, and the lecturer can adjust it according to the needs. Choose a suitable viewing angle to improve the user's comfort experience. Both sides of the touch control screen 4 are provided with a touch pad 6 and function keys 7 for sending instructions to the main display screen 3, such as moving, zooming in and out of the CAD teaching model or switching the CAD teaching system. The bottom of the box body 1 is provided with a telescopic bracket 5 for adjusting the height of the teaching device. The telescopic bracket 5 is detachably connected with the box body 1 to adjust the height of the CAD teaching device so that it is suitable for different teaching environments.

The cabinet 1 in the present embodiment is a transparent rectangular frame cabinet, and the bottom surface of the pyramid display screen 2 coincides with the bottom surface of the cabinet body 1; Connection; the main display screen 3 is erected on the top of the pyramid display screen 2 with the screen facing down, and the center of the main display screen 3 can be adjusted to coincide with the top vertex of the pyramid display screen 2 by sliding up and down, and it can prevent the pyramid display screen 2 from being shaken during transportation The spire damages the main display.

In addition, a host computer for processing CAD three-dimensional model information and interactive control is also provided in the box body 1. The main display screen 3, touch control screen 4, touch panel 6 and function keys 7 are all interactively connected with the host computer. The host computer processes the CAD three-dimensional model information and displays the corresponding view on the main display screen 3, and can perform interactive control and various adjustment functions, including zooming in and out, rotation, brightness contrast of the display device, and other adjustment functions.

Embodiment two

As shown in Figure 2, it is the second embodiment of the CAD teaching system based on holographic projection of the present invention, including a modeling module for establishing a CAD teaching model and performing material rendering and mold inversion processing, for converting the CAD teaching model into An animation conversion module for 3D animation and a display module for displaying holographic projection, the modeling module, animation conversion module and display module are sequentially connected by communication.

Wherein, the modeling module is selected from one or more combinations of 3D Max modeling module, Maya modeling module and Pro/E modeling module.

The specific implementation of this embodiment is as follows:

S1. Model the mechanical mechanism of CAD teaching through the modeling module, and perform material rendering and inversion processing;

S2. After step S1, the CAD teaching model is converted into a three-dimensional animation by the animation transformation module;

S3. After step S2, the 3D animation is displayed through holographic projection through the display module.

Through the above steps, when the teacher needs to explain a certain view of the model, he can first stop the rotation of the model, and then rotate the model to make it present a left view, or select a view from any angle in this way; Adjust the size, position, and clarity of the image to display a holographic file with good overall quality.

Apparently, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, on the basis of the above description, other changes or changes in different forms can also be made. It is not necessary and impossible to exhaustively list all the implementation manners here. All modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (8)

1. A CAD teaching device based on holographic projection, characterized in that it comprises a box body (1), a pyramid display screen (2) located in the box body (1) and a main display for displaying content to be holographic projection screen (3), the main display screen (3) is set directly above the pyramid display screen (2), and the geometric center of the main display screen (3) coincides with the apex of the pyramid display screen (2) , the bottom surface of the pyramid display screen (2) is set horizontally with the main display screen (3). 2. The CAD teaching device based on holographic projection according to claim 1, characterized in that, the box body (1) is provided with a touch control screen (4), and the touch control screen (4) is connected with the box The body (1) is turned over and connected; the angle range of the touch control panel (4) being turned over relative to the top surface of the box body (1) is 0°~90°. 3. The CAD teaching device based on holographic projection according to claim 1, characterized in that, the bottom of the box (1) is provided with a telescopic bracket (5) for adjusting the height of the teaching device, and the telescopic bracket (5 ) is detachably connected with the box body (1). 4. The CAD teaching device based on holographic projection according to claim 1, characterized in that, the box body (1) is also provided with a touch panel (6) and function keys (7) for sending instructions to the main display screen ). 5. The CAD teaching device based on holographic projection according to claim 4, characterized in that, the box (1) is also provided with a host computer for processing CAD three-dimensional model information and interactive control, and the main display The screen (2), the touch control screen (4), the touch panel (6) and the function keys (7) are all interactively and electrically connected with the computer host. 6. The CAD teaching device based on holographic projection according to any one of claims 1 to 5, characterized in that, the box (1) is a transparent rectangular frame box, and the pyramid display screen (2) The bottom surface coincides with the bottom surface of the box body (1); the bottom surface of the main display screen (3) is congruent with the bottom surface of the pyramid display screen (2), and is slidably connected with the box body (1). 7. A CAD teaching system based on holographic projection, characterized in that it includes a modeling module for establishing a CAD teaching model and performing material rendering and inversion processing, and an animation conversion module for converting the CAD teaching model into a three-dimensional animation As well as a display module for displaying holographic projections, the modeling module, animation conversion module and display module are sequentially connected by communication. 8. the CAD teaching system based on holographic projection according to claim 7, is characterized in that, described modeling module is one or more of 3D Max modeling module, Maya modeling module, Pro/E modeling module The combination.