Portable demonstration experiment box for electrical and electronic technology classroom teaching
By designing a portable demonstration experiment box, using micro-programmed digital instruments and virtual instrument technology, the problem of existing equipment being bulky and it is difficult for students to watch experiments in real time is solved, and the portability and real-time projection of experimental equipment is realized, which improves the teaching effect.
Patent Information
- Application Number
- CN202420670953.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-03
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-04-03
AI Technical Summary
The existing electrical and electronic technology classroom teaching equipment is bulky and inconvenient to be transported, it is difficult to deeply understand and master it in the theoretical classroom, and it is difficult for students to clearly view the experimental process in real time.
A portable demonstration experiment box was designed, using micro-programmed digital instruments, program control technology and virtual instrument technology, and control high-definition camera, program-controlled oscilloscope and signal generator through a touch-controlled integrated industrial control machine to capture and output experimental processes and results in real time, and project Go to the classroom projection equipment.
It realizes portability and real-time projection of experimental equipment, improves students' classroom participation and teaching effect, and meets the needs of many students to watch experiments offline in the classroom.
Smart Images
Figure CN222462236U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an experimental box for classroom teaching, in particular to a portable demonstration experimental box for classroom teaching of electrical and electronic technology, belonging to the field of new technologies and methods for electronic technology teaching. Background Art
[0002] The electrical and electronic technology course is a compulsory engineering technology foundation course for undergraduate students of non-electrical majors such as machinery, materials, chemical engineering, aerospace, and automobiles in general engineering colleges and universities. It has strong theoretical, practical, and comprehensive application, involves many knowledge points, develops rapidly, and has a large classroom capacity (often more than 100 people). In the actual teaching process, it is difficult for students to deeply understand and master the knowledge points in classroom teaching with limited study hours. Demonstration experiments entering theoretical classrooms can build a bridge between theory and practice, enhance students' classroom participation, and improve the effectiveness and efficiency of classroom teaching. However, general desktop general electronic experimental instruments are large in size and bulky, and are not convenient to carry to theoretical classrooms. They are only suitable for teaching miniaturized experimental courses in special experiments. In order to promote the integration of demonstration experiments and theoretical classrooms, it is necessary to miniaturize and program experimental instruments and make them easy to carry. At the same time, it is also necessary to meet the needs of every student in classroom teaching to clearly watch the experimental process in real time. Utility Model Content
[0003] In order to solve the above problems, the utility model designs a portable demonstration experiment box for classroom teaching of electrical and electronic technology by applying micro-programmable digital instruments, program control technology and virtual instrument technology. The box is not only convenient for teachers to carry, but also can shoot the teacher's operation demonstration process and experimental results through a high-definition camera, and then integrate the captured image with the data read by the programmable instrument, and then output it through the HDMI interface to display it on the classroom projection device (such as the large projection screen configured in the classroom). In conjunction with large-capacity classroom multimedia equipment, students can clearly watch the demonstration experiment process and results in real time.
[0004] The purpose of the utility model can be achieved through the following technical solutions:
[0005] A portable demonstration experiment box for classroom teaching of electrical and electronic technology, comprising: a portable box body, a touch-control integrated industrial computer 1, a high-definition camera module 4, a program-controlled oscilloscope module, a program-controlled multimeter module 2, a program-controlled signal generator module, a video switching module, a power supply unit and control software; characterized in that: the portable experiment box uses the touch-control integrated industrial computer as the control core, and runs the control software, controls the high-definition camera, the program-controlled oscilloscope module and the program-controlled signal generator module through a USB interface, connects the program-controlled multimeter module through an RS232 interface, and displays the status of each controlled module and its test parameters on the screen of the touch-control integrated industrial computer. At the same time, the touch-control integrated industrial computer is equipped with an HDMI interface, through which the classroom projection device can be connected to project the screen of the touch-control integrated industrial computer onto a large screen.
[0006] Preferably, the portable box body adopts a trolley box structure with two small wheels, one side is equipped with a lock, and the other side is connected to the box cover and the box base by a hinge; wherein, a touch-controlled integrated industrial computer and a programmable multimeter module are fixed on the box cover, and two USB interfaces of the touch-controlled integrated industrial computer are led out, and a programmable oscilloscope module, a programmable signal generator module, a video switching module and a power supply unit are fixedly placed in the box body; the AC 220V power supply interface 7 of the power supply unit and the HDMI output interface and HDMI input interface of the video switching module are led out to the side of the box body; there is space for placing a high-definition camera module inside the box body; and an operation panel 3 is installed in the box body.
[0007] Preferably, the operation panel is divided into three areas, namely, an interface area, an experimental operation area (camera shooting area) 3-16 and a high-definition camera placement area 3-17; the DC interface of the power supply unit (including ±15V, 24V, 12V, 5V interfaces), the programmable oscilloscope module channel A 3-2, the programmable oscilloscope module channel B 3-3, the programmable oscilloscope module AWG channel 3-4, the programmable signal generator module channel A 3-5, the programmable signal generator module channel B 3-6, the programmable signal generator module external trigger channel 3-7, the programmable signal generator module TTL output channel 3-8 and the switching button 3-1 of the video switching module are fixed in the interface area; there is an area on the operation panel for placing the high-definition camera module.
[0008] Preferably, the video switching module can control the HDMI output source of the portable experiment box through a switching button. When the power is turned on by default, the HDMI output interface 5 of the portable experiment box uses the touch-screen integrated industrial computer as the output source. When the button is pressed, the HDMI output source of the experiment box becomes the device connected to the HDMI input interface 6 of the experiment box.
[0009] Preferably, the camera of the high-definition camera module can realize automatic focus, adopt a single-link folding design, and can adjust the height of the camera; at the same time, the module can transmit the real-time image of the camera to the touch-controlled integrated industrial computer through a USB interface.
[0010] Preferably, the touch-controlled integrated industrial computer runs a 64-bit Windows 10 operating system and runs control software on the system; the control software is designed using the graphical development tool LabVIEW, which can realize the camera screen display of the high-definition camera module, the control and waveform display of the programmable oscilloscope module, the control of the programmable signal generator module, and the value reading of the programmable multimeter module.
[0011] Preferably, the programmable multimeter module can read the voltage and current of DC and AC, read the resistance value, capacitance value and determine whether the circuit is on or off, and also has the function of sending the read values to the touch-screen integrated industrial computer through the RS232 interface.
[0012] Preferably, the interactive interface of the control software consists of three tabs, namely, a high-definition camera, an oscilloscope and an integrated control tab; by default, the integrated control tab program interface is mainly used for operation and control; the integrated control tab program interface integrates the functions of the high-definition camera, oscilloscope, multimeter, signal generator, etc., and provides a complete demonstration experiment teaching resource platform usage interface. If you need to view a large image of the high-definition camera, you can switch to the high-definition camera tab interface; if you need to view a large image of the oscilloscope, you can switch to the oscilloscope tab interface.
[0013] Compared with the prior art, the beneficial effects of the utility model are:
[0014] The experimental instruments required for classroom teaching demonstration experiments are digitized and miniaturized, making it easy to bring demonstration experimental equipment into the classroom; a camera is equipped to capture the experimental screen in real time and then project it onto the classroom screen after integration, which is suitable for more students to watch in real time in offline classes, improving the teaching quality and effect; the redundant USB interface of the industrial computer is introduced to facilitate the expansion and updating of experimental instruments, so that the demonstration experiment can be changed according to the improvement of classroom content, keep up with the rapid development of subject content, and keep pace with the times; while miniaturizing the instrument, measurement equipment with lower accuracy and range is selected to meet the needs of classroom demonstration experiments while reducing costs; the concise and intuitive human-computer interaction interface design is convenient for teachers to use and promote. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.
[0016] Figure 1This is a schematic diagram of the structure of the portable experimental box of the utility model.
[0017] 1. Touch-screen integrated industrial computer; 2. Programmable multimeter module; 3. Operation panel; 4. High-definition camera module;
[0018] 5. HDMI output interface of the experimental box; 6. HDMI input interface of the experimental box; 7. AC 220V power supply interface.
[0019] Figure 2 It is a schematic diagram of the combined architecture of various modules inside the portable experimental box of the utility model.
[0020] Figure 3 This is a schematic diagram of the operation panel of the utility model. In the figure:
[0021] 3-1, switch button of video switching module; 3-2, channel A of programmable oscilloscope module; 3-3, channel B of programmable oscilloscope module; 3-4, AWG channel of programmable oscilloscope module; 3-5, channel A of programmable signal generator module;
[0022] 3-6, channel B of program-controlled signal generator module; 3-7, external trigger channel of program-controlled signal generator module;
[0023] 3-8, TTL output channel of program-controlled signal generator module;
[0024] 3-9, ±15V interface; 3-10, 24V interface; 3-11, 12V interface 1; 3-12, 12V interface 2;
[0025] 3-13, 12V interface 3; 3-14, 5V interface 1; 3-15, 5V interface 2; 3-16, experimental operation area (camera shooting area); 3-17, high-definition camera placement area.
[0026] Figure 4 This is a schematic diagram of a video switching module of the utility model.
[0027] Figure 5 It is a screenshot of the UI interface of the comprehensive control option card of the control software of the utility model. DETAILED DESCRIPTION
[0028] In order to facilitate the understanding of the purpose, technical solutions and advantages of this application by those skilled in the art, this application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.
[0029] A portable demonstration experiment box for classroom teaching of electrical and electronic technology includes a portable box body, a touch-control integrated industrial computer, a high-definition camera module, a program-controlled oscilloscope module, a program-controlled multimeter module, a program-controlled signal generator module, a video switching module, a power supply unit and control software. Each module of the portable experiment box is embedded in the portable box body.
[0030] See also Figure 1 The preferred embodiment of the utility model provides a schematic diagram of the appearance of the experimental box body, which adopts a suitcase-style design with two small wheels on one side of the bottom. The chassis structure adopts a typical flip-top structure. The overall dimensions of the chassis are: 668mm wide, 495mm long, 75mm high for the box cover, 254mm high for the box base, 60mm deep inside the box cover, one side is equipped with a lock, and the other side connects the box cover and the box base through a hinge. Among them, the touch-controlled integrated industrial computer and the programmable multimeter module are fixed on the box cover, and the two USB interfaces of the touch-controlled integrated industrial computer are led out. The high-definition camera module, programmable oscilloscope module, programmable signal generator module, video switching module and power supply unit are fixed on the box base; the AC 220V power supply interface of the power supply unit and the HDMI output interface and HDMI input interface of the video switching module are led out to the side of the box body; a plastic plate adapted to the cross-sectional size of the box body is used as the operation panel.
[0031] See also Figure 2 The preferred embodiment of the utility model uses the touch-control integrated industrial computer as the control core, and runs the control software, controls the high-definition camera, program-controlled oscilloscope module and program-controlled signal generator module through the USB interface, connects the program-controlled multimeter module through the RS232 interface, and displays the status of each controlled module and its test parameters on the screen of the touch-control integrated industrial computer. At the same time, the industrial computer is equipped with an HDMI interface, through which the classroom projection equipment can be connected to project the screen of the touch-control integrated industrial computer onto a large screen.
[0032] Among them, the specific model of the touch-integrated industrial computer is QY-P156-HM, which uses an Intel Core i5 processor, an LCD screen resolution of 1920X1080, a full-plane capacitive touch screen, 4 USB ports, two RS232 serial ports, and dimensions: width 404mm, height 262mm, depth 53mm. The programmable oscilloscope module uses a 2-channel compact lightweight oscilloscope Pico 2208B, 100MHz bandwidth, 1GS / s sampling rate, dimensions: width 130mm, depth 104mm, height 18.8mm, the module uses a high-speed USB interface for data transmission and power supply. The model of the high-definition camera module is S1001YL1050AF, with 15 million pixels, auto focus, touch-type LED fill light, and a frame rate of 30fps when the resolution is 1920*1080. The folding arm and camera of the high-definition camera can be manually rotated to adjust the angle, and the real-time image of the camera can be transmitted to the touch-integrated industrial computer through the USB interface. The programmable multimeter module uses the 4.5-digit (Ulead) digital multimeter UT71A with RS232 interface. The programmable signal generator module uses the 2-channel, 60M bandwidth, USB interface function / arbitrary waveform signal generator module FY2300, which can read the voltage and current of DC and AC, read the resistance value, the capacitance value, and judge the circuit connection, and can also send the read value to the touch-integrated industrial computer through the RS232 interface. The power supply unit includes AC / DC-12V-2A module, AC / DC-5V-2A module and AC / DC-±15V-1A module. The core part of the video switching module uses the UGREEN HDMI two-input and one-output splitter CM217. The CM217 is designed with a button for manual switching. In the actual design integration, the two normally open pins of the switch button of the CM217 are connected to the normally open contacts of the inching button installed on the operation panel through wiring. Here, this inching button is called the video output switching button.
[0033] See also Figure 3 , a preferred embodiment of the utility model provides a schematic diagram of an operation panel, with 7 BNC sockets arranged at the top, and the relevant channels of the programmable oscilloscope module and the programmable signal generator module are introduced into the operation panel. At the same time, the output of the power supply unit is also introduced into the operation panel through 7 groups of adapter sockets, including 1 group of ±15V, 1 group of 24V, 3 groups of 12V, and 2 groups of 5V. The operation panel provides a large experimental operation area at the lower left, and a high-definition camera module placement area on the right. The experimental operation area is photographed by moving the camera of the high-definition camera module. A video output switching button is also arranged in the upper right part of the operation panel. Clicking this button can realize the switching output control function of the touch-screen integrated industrial computer display video and the external input video.
[0034] See also Figure 4 The preferred embodiment of the utility model provides a schematic diagram of a video switching module, and the HDMI output source of the portable experiment box can be controlled by a switching button. When the power is turned on by default, the HDMI output interface of the portable experiment box uses the touch-screen integrated industrial computer as the output source. When the button is pressed, the HDMI output source of the experiment box becomes the device connected to the HDMI input interface of the experiment box.
[0035] See also Figure 5 , the preferred embodiment of the utility model provides a screenshot of the UI interface of the comprehensive control tab of the control software. The control software runs on a 64-bit Windows 10 operating system and is designed and written using LabVIEW 2017, a classic graphical development tool for virtual instruments. For the application scenario of classroom experimental teaching, the control software includes the following core modules: video shooting, oscilloscope control, multimeter reading and signal generator control modules. The video shooting module is based on the visual acquisition module VAS (Vision Acquisition Software) provided by LabVIEW software for functional development, and uses the various functions encapsulated in the NI-IMAQdx toolkit to obtain the image data transmitted from the camera to the host computer from the USB interface, and displays it graphically through the display control. In addition, functions such as shooting resolution setting, focusing, image rotation, area zooming in and out, image capture and saving are also implemented. The oscilloscope control module controls the oscilloscope based on the LabVIEW development toolkit PicoScope2000aLib provided by Pico 2208B. The main control functions include: channel enable control, image zoom control, amplitude and time measurement, time resolution adjustment, amplitude adjustment or adaptive setting, trigger channel selection, trigger mode selection, trigger level setting, etc. The multimeter reading module and signal generator control module are both developed based on the VISA module provided by LabVIEW, and implement the hardware module control function and the data reading function sent by the hardware module according to the serial communication protocol. When controlling the multimeter serial port, DTR should be set to high level, RTS to low level, and the flow control in the serial port configuration should be None.
[0036] The interactive interface of the control software consists of three tabs, namely, the HD camera, oscilloscope and integrated control tabs; by default, the integrated control tab program interface is used as the main operation and control; the integrated control tab program interface integrates the functions of the HD camera, oscilloscope, multimeter, signal generator, etc., and provides a complete demonstration experiment teaching resource platform usage interface. If you need to view a large image of the HD camera, you can switch to the HD camera tab interface; if you need to view a large image of the oscilloscope, you can switch to the oscilloscope tab interface.
[0037] In the process of teaching electrical and electronic technology, teachers can first connect their own computers to play teaching courseware. When they need to demonstrate experiments for explanation, they can press the video switch button. At this time, the HDMI interface of the portable box uses the touch-screen integrated industrial computer as the output source, and projects the screen of the industrial computer onto the large screen in the classroom. Then, the classroom conducts demonstration experiments in the experimental operation area, and the high-definition camera will shoot the experimental scenes and processes. Students can clearly observe the entire process of the demonstration experiment from their seats in the classroom. After the experiment, press the video switch button again. At this time, the HDMI interface of the portable box uses the teacher's own computer as the output source to play the courseware normally.
[0038] The above description is only a preferred example of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A portable demonstration experiment box for classroom teaching of electrical and electronic technology, characterized in that: It includes: A portable box body, a touch-controlled industrial computer, a high-definition camera module, a programmable oscilloscope module, a programmable multimeter module, a programmable signal generator module, a video switching module, a power supply unit and control software; the portable demonstration experiment box takes the touch-controlled industrial computer as the control core, and enables it to run the control software, controls the high-definition camera, the programmable oscilloscope module and the programmable signal generator module through the USB interface, connects the programmable multimeter module through the RS232 interface, and displays the status of each controlled module and its test parameters on the screen of the touch-controlled industrial computer; at the same time, the touch-controlled industrial computer is equipped with an HDMI interface, through which the classroom projection equipment is connected to project the screen of the touch-controlled industrial computer onto a large screen.
2. A portable demonstration experiment box for classroom teaching of electrical and electronic technology according to claim 1, characterized in that: The portable box body adopts a trolley box structure with two small wheels, one side is equipped with a lock, and the other side is connected to the box cover and the box base by a hinge; wherein, a touch-controlled integrated industrial computer and a programmable multimeter module are fixed on the box cover, and two USB interfaces of the touch-controlled integrated industrial computer are led out; a programmable oscilloscope module, a programmable signal generator module, a video switching module and a power supply unit are fixedly placed in the box body; an AC 220V power supply interface of the power supply unit and an HDMI output interface and an HDMI input interface of the video switching module are led out to the side of the box body; there is space for placing a high-definition camera module inside the box body; and an operation panel is installed in the box body.
3. A portable demonstration experiment box for classroom teaching of electrical and electronic technology according to claim 2, characterized in that: The operation panel is divided into three areas, namely, an interface area, an experimental operation area and a high-definition camera placement area; the DC interface of the power supply unit, the programmable oscilloscope module channel A, the programmable oscilloscope module channel B, the programmable oscilloscope module AWG channel, the programmable signal generator module channel A, the programmable signal generator module channel B, the programmable signal generator module external trigger channel, the programmable signal generator module TTL output channel and the switching button of the video switching module are fixed in the interface area; there is an area for placing the high-definition camera module on the operation panel.
4. A portable demonstration experiment box for classroom teaching of electrical and electronic technology according to claim 1, 2 or 3, characterized in that: The video switching module controls the HDMI output source of the portable demonstration experiment box through a switching button. When the power is turned on by default, the HDMI output interface of the portable demonstration experiment box uses the touch-screen integrated industrial computer as the output source. When the button is pressed, the HDMI output source of the experiment box becomes the device connected to the HDMI input interface of the experiment box.
5. A portable demonstration experiment box for classroom teaching of electrical and electronic technology according to claim 1, 2 or 3, characterized in that: The camera of the high-definition camera module realizes automatic focus and adopts a single-link folding design to adjust the height of the camera; at the same time, the module can transmit the real-time image of the camera to the touch-screen integrated industrial computer through a USB interface.
6. A portable demonstration experiment box for classroom teaching of electrical and electronic technology according to claim 5, characterized in that: The touch-control integrated industrial computer runs a 64-bit Windows 10 operating system, and runs a control software on the system; the control software is designed using the graphical development tool LabVIEW to realize the camera screen display of the high-definition camera module, the control and waveform display of the programmable oscilloscope module, the control of the programmable signal generator module, and the value reading of the programmable multimeter module.
7. A portable demonstration experiment box for classroom teaching of electrical and electronic technology according to claim 6, characterized in that: The programmable multimeter module reads the voltage and current of direct current and alternating current, reads the resistance value, the capacitance value and determines whether the circuit is on or off, and has the function of sending the read values to the touch-screen integrated industrial computer through the RS232 interface.
8. The portable demonstration experiment box for classroom teaching of electrical and electronic technology according to claim 1 is characterized by: The interactive interface of the control software consists of three tabs, namely, the HD camera, the oscilloscope and the comprehensive control tab; by default, the comprehensive control tab program interface is used as the main operation and control; the comprehensive control tab program interface integrates the functions of the HD camera, oscilloscope, multimeter and signal generator, and provides a complete demonstration experiment teaching resource platform usage interface. If you need to view a large image of the HD camera, switch to the HD camera tab interface; if you need to view a large image of the oscilloscope, switch to the oscilloscope tab interface.