AR teaching aid based on skin electric signal acquisition

Abstract

The utility model relates to the field of digital teaching. The AR teaching aid based on skin electric signal acquisition comprises a teaching aid body and a skin electric signal acquisition module, and the teaching aid body is provided with a concave T-shaped inlaying groove; the skin electric signal acquisition module comprises a T-shaped embedding block matched with the embedding groove, a skin electrode plate is arranged on the surface of the embedding block, a mounting cavity is formed in the embedding block, and an ARM microprocessor electrically connected with the skin electrode plate and a communication sub-module are arranged in the mounting cavity; the ARM microprocessor is in communication connection with the AR system through the communication sub-module; the bottom of the insert block is further provided with a fixing assembly used for fixing the insert block in the inlaying groove. According to the utility model, the skin electric signal acquisition module is mounted on the teaching aid, so that physiological electric signals of students can be acquired in a non-inductive manner through natural contact between the students and the teaching aid in the teaching process, and the physiological electric signals are used as the basis of AR teaching.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of digital teaching, concretely relates to an AR teaching aid based on skin electricity signal collection. BACKGROUND

[0002] With the development of education technology, augmented reality (AR) as an immersive learning tool is increasingly applied in teaching scenarios. AR technology provides intuitive interaction and immersive learning experience by superimposing virtual content onto the real world. However, existing AR teaching systems mainly focus on visual and auditory interaction, ignoring the emotional and physiological state of students during the learning process. The emotional state of students, especially stress, anxiety, tension and other emotions, has a direct impact on learning effectiveness, but in traditional teaching systems, teachers have difficulty in real-time sensing and feedback of these emotional changes, limiting the effectiveness of personalized teaching.

[0003] In recent years, physiological sensors (such as heart rate sensors, skin electricity sensors) have been gradually applied in the field of affective computing, which can identify the emotional state of individuals by monitoring physiological signals. In some educational scenarios, students wear physiological monitoring devices (such as smart bracelets or head-mounted devices) for physiological feedback monitoring to help teachers understand the emotional state of students. However, such wearable devices often interfere with the learning process of students, affecting their natural learning behavior, and also increasing the complexity and cost of hardware devices.

[0004] Therefore, if the skin electricity sensor can be integrated into the teaching aid (such as marker), realizing non-invasive emotional state monitoring, it will effectively improve the above problems. This scheme can collect skin electricity activity data through natural contact with the skin electricity sensor on the marker during the natural use of the marker by students, and analyze the emotional state of students (such as relaxation, tension, anxiety, etc.) through an emotional state recognition algorithm. The processing system combines AR technology to adjust the teaching content in real time through a dynamic feedback mechanism (such as marker color change), so that the teaching system can automatically adapt to the emotional changes of students, thereby optimizing the effectiveness of personalized teaching. At the same time, teachers can timely perceive the state of students and adjust the teaching rhythm.

[0005] However, due to the variety of teaching aids, such as various cube models, geometric figure boards, etc., if all teaching aids are designed with skin electricity sensors in the above manner, the design cost will greatly increase, which is not economical. At the same time, due to the high cost of modifying existing teaching aids, it is not universal and not conducive to popularization. SUMMARY

[0006] The utility model aims at providing a kind of AR teaching aid based on skin electricity signal collection, which is convenient and quick to install, and has good stability.

[0007] To achieve the above-mentioned object of the application, the technical scheme adopted by the utility model is: an AR teaching aid based on skin electric signal collection, comprising an aid main body and a skin electric signal collection module, wherein the aid main body is provided with an inner recessed T-shaped inlay groove;

[0008] The skin electric signal collection module comprises a T-shaped inlay block matched with the inlay groove, the surface of the inlay block is provided with a skin electrode sheet, the inside of the inlay block is provided with an installation cavity, the installation cavity is provided with an ARM microprocessor and a communication submodule which are electrically connected with the skin electrode sheet, and the ARM microprocessor is in communication connection with an AR system through the communication submodule.

[0009] The bottom of the inlay block is further provided with a fixing assembly for fixing the inlay block inside the inlay groove.

[0010] Preferably, the fixing assembly comprises a bottom block arranged at the middle bottom of the inlay block, and a magnetic shielding plate is arranged between the bottom block and the inlay block; the bottom of the bottom block is provided with a magnetic block and is adsorbed in the inlay groove through the magnetic block.

[0011] Preferably, the fixing assembly comprises a Velcro arranged at the bottom of both sides of the inlay block, and the inlay groove is also provided with a Velcro on the stepped surface and is bonded with the bottom of both sides of the inlay block through the Velcro.

[0012] Preferably, the skin electrode sheet is arranged at the middle of the top surface of the inlay block, and photovoltaic sheets are arranged at both ends of the top surface of the inlay block; a battery submodule for power supply is further arranged in the installation cavity, and the battery submodule is electrically connected with the photovoltaic sheets.

[0013] Preferably, the communication submodule comprises one or more of a Bluetooth unit, a WIFI unit and a Zigbeen unit.

[0014] Preferably, the inlay block comprises a body and a bottom cover arranged below the body and clamped with the body, and the installation cavity is surrounded by the body and the bottom cover.

[0015] The beneficial effects of this invention are mainly reflected in the following: by installing the skin electrodermal signal acquisition module on the teaching aid, the physiological electrical signals of students can be collected non-invasively through natural contact between the student and the teaching aid during the teaching process, serving as the basis for AR teaching. It is adaptable to various teaching aids, easy and quick to install, and has good stability. Specifically, in use, this invention only requires drilling holes in the mounting slot on the teaching aid to meet the modification needs of existing teaching aids. When teaching in an AR scene, the skin electrodermal signal acquisition module is installed in the mounting slot. When the student holds the teaching aid normally, and their skin comes into contact with the skin electrodermal signal acquisition module, the module can collect and process the student's electrical signals, which are then sent to the AR system for comprehensive analysis and processing via the communication submodule. The AR system provides real-time feedback to facilitate targeted teaching and adjustments to the teaching content and intensity. This invention adopts a T-shaped mounting slot and insert structure, which provides ample installation and integration space, and excellent stability after installation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention in one embodiment;

[0017] Figure 2 This is a schematic diagram of the skin electrodermal signal acquisition module;

[0018] Figure 3 This is a circuit block diagram of the present invention. Detailed Implementation

[0019] like Figures 1-3 As shown, an AR teaching tool based on skin electrophysiological signal acquisition serves as an accessory to an AR scenario-based teaching system. It can collect students' skin physiological electrophysiological signals in real time and is used as the acquisition end in the entire system. On the presentation end, it can currently be used to perform visual augmented reality operations through AR auxiliary glasses connected to the AR system to improve the teaching effect. Of course, adding tactile presentation, odor presentation, etc. is also feasible.

[0020] This utility model includes a teaching aid body 1 and a skin electrodermal signal acquisition module 2. The teaching aid body 1 serves as a teaching medium and also as the carrier of the skin electrodermal signal acquisition module 2. It can be custom-made separately or modified from an existing teaching aid body 1, achieved through a slotting method. Figure 1As shown in the figure, the teaching aid body 1 is a cube, of course, in the actual application scene, it can also be a triangular pyramid, a cone, a cuboid and the like, and can also be some teaching aids other than these shapes, which are not limited in the utility model. The teaching aid body 1 is provided with an inner recessed T-shaped inlaid groove, which has a larger fixing surface compared with a traditional square groove and a round groove, and can realize more stable fixing through more three-dimensional limiting.

[0021] As shown in the figure, Figure 2 As shown in the figure, the skin electrical signal acquisition module 2 comprises a T-shaped inlaid block 3 matched with the inlaid groove, the surface of the inlaid block 3 is provided with a skin electrode piece 4, and the inside of the inlaid block 3 is provided with a mounting cavity 5. In order to meet the needs of installation in the mounting cavity 5, generally the inlaid block 3 comprises a body and a bottom cover arranged below the body and clamped with the body, the mounting cavity 5 is surrounded by the body and the bottom cover, and the inside is used for mounting various electronic elements, chips and the like.

[0022] The mounting cavity 5 is provided with a processor electrically connected with the skin electrode piece 4, which can be an ARM microprocessor 6, a single-chip microcomputer and the like, and a communication submodule 7. The ARM microprocessor 6 is in communication connection with an AR system through the communication submodule 7, can transmit the collected skin electrical signals to the AR system, perform analysis and processing, and realize real-time feedback. Generally, the relay terminal arranged in the classroom can be used for transmission to realize the collection and transmission of multiple groups of signals. The preferred short-distance communication mode includes Bluetooth, WIFI, Zigbeen and the like, and one or more of them can be selected.

[0023] Regarding the stable fixing of the inlaid block 3 in the inlaid groove, the bottom of the inlaid block 3 is further provided with a fixing assembly for fixing the inlaid block 3 inside the inlaid groove. It can be realized through magnetic attraction, pasting and the like, for example: the fixing assembly comprises a bottom block 8 arranged at the middle bottom of the inlaid block 3, the bottom of the bottom block 8 is provided with a magnetic block 10, and the inlaid block 3 is adsorbed in the inlaid groove through the magnetic block 10. In order to prevent magnetic interference, a magnetic shielding plate 9 can be arranged between the bottom block 8 and the inlaid block 3. For example: the fixing assembly comprises a Velcro 11 arranged at the bottom of both sides of the inlaid block 3, and the step surface of the inlaid groove is also correspondingly provided with the Velcro 11, and the bottom of both sides of the inlaid block 3 is formed by the Velcro 11. These two ways can be used alone or in combination.

[0024] In addition, the utility model is arranged on the teaching aid body 1, and is not suitable for the mode of wired power supply, and the overall power consumption is small, so the utility model can set the skin electrode piece 4 on the middle part of the top surface of the inlaid block 3, and the both ends of the top surface of the inlaid block 3 are provided with photovoltaic pieces 12. The mounting cavity 5 is further provided with a battery submodule 13 for power supply, and the battery submodule 13 is electrically connected with the photovoltaic pieces 12.

Claims

1. An AR teaching aid based on skin electrical signal acquisition, characterized in that: Including teaching aid main body (1) and skin electric signal acquisition module (2), the teaching aid main body (1) is provided with the recessed T-shaped inlay groove; The skin electric signal acquisition module (2) includes the T-shaped inlay block (3) matched with the inlay groove, the surface of the inlay block (3) is provided with the skin electrode piece (4), the inside of the inlay block (3) is provided with the installation cavity (5), the installation cavity (5) is provided with the ARM microprocessor (6) and communication submodule (7) electrically connected with the skin electrode piece (4), and the ARM microprocessor (6) is connected with AR system communication through communication submodule (7); The bottom of the inlay block (3) is also provided with a fixing assembly for fixing the inlay block (3) in the inlay groove.

2. The AR teaching aid based on skin electrical signal acquisition according to claim 1, characterized in that: The fixing assembly includes a bottom block (8) disposed at the middle bottom of the inlay block (3), and a magnetic shielding plate (9) is disposed between the bottom block (8) and the inlay block (3); a magnetic block (10) is disposed at the bottom of the bottom block (8) and is adsorbed in the inlay groove through the magnetic block (10). 3.The AR teaching aid based on skin electrical signal acquisition according to claim 1 or 2, characterized in that: The fixing assembly includes a Velcro (11) disposed at the bottom of the inlay block (3) on both sides, and a Velcro (11) is also disposed on the stepped surface of the inlay groove, and the Velcro (11) is formed on the bottom of both sides of the inlay block (3) by adhesion. 4.The AR teaching aid based on skin electrical signal acquisition of claim 1, wherein: The skin electrode piece (4) is disposed at the middle of the top surface of the inlay block (3), and photovoltaic pieces (12) are disposed at both ends of the top surface of the inlay block (3); a battery submodule (13) for power supply is also disposed in the installation cavity (5), and the battery submodule (13) is electrically connected with the photovoltaic pieces (12). 5.The AR teaching aid based on skin electrical signal acquisition according to claim 1, characterized in that: The communication submodule (7) includes one or more of a Bluetooth unit, a WIFI unit and a Zigbeen unit. 6.The AR teaching aid based on skin electrical signal acquisition according to claim 1, characterized in that: The inlay block (3) includes a body and a bottom cover disposed below the body and clamped with the body, and the installation cavity (5) is surrounded by the body and the bottom cover.

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