Digital barrier-free motion composition and decomposition demonstrator

Abstract

The utility model discloses / relates to a digital barrier-free motion composition and decomposition demonstrator. The technical scheme has the following key points: 1, a motor is used for transmission, and a 3D printing pen enables a motion synthesis and decomposition track to be visualized and touchable, so that students can conveniently perceive and understand the motion track and direction, establish a motion synthesis and decomposition concept and qualitatively explore; 2, a digital display speed regulator is used for speed regulation, a sensor and screen reading software are used for measuring a resultant displacement inclination angle, and quantitative exploration is performed; the main purpose of the utility model is as follows: 1, the defects that the phenomenon is not visual enough, the angle cannot be identified and the quantitative exploration cannot be performed in the demonstration experiment of the third section of wax block in the second and fifth chapters are overcome; 2, vision and defect compensation are replaced by tactile sense and auditory sense, so that the problems that blind people cannot perceive motion synthesis decomposition experiment phenomena and object motion trails and cannot measure resultant displacement inclination angles are solved; 3, visual experiment teaching, qualitative and quantitative combination, barrier-free digital experiment and meaningful learning are realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to digitalization demonstration experiment device of barrier -free motion synthesis and decomposition rule, especially can let blind student perceive motion trajectory and measure obtain the demonstration ware of the numerical value of combined motion (combined displacement) inclination angle quantitative inquiry. BACKGROUND

[0002] The utility model can be widely used in high school physics teaching demonstration, draw the trajectory of motion synthesis and decomposition, and can quantitatively measure the inclination angle of combined motion (combined displacement) relative to the horizontal direction.

[0003] The demonstration experiment provided in the current high school physics textbook is to guide students to observe the position change of the wax block in the glass tube filled with water that moves horizontally to establish the concept of motion synthesis. This demonstration experiment device cannot solidify the motion trajectory, because the initial position, final position and change process of the wax block cannot be visualized and solidified, students cannot observe the change rule of the corresponding position, and cannot conduct quantitative inquiry; and blind students cannot observe the position change of the wax block in the glass tube by visual observation or by touching with hands.

[0004] At present, the instruments for demonstrating motion synthesis and decomposition in the domestic experimental instrument and demonstration teaching aid industry generally use pencils or magnetic pens to draw trajectories on whiteboards that can be observed by ordinary people, such as motion synthesis and decomposition demonstrator (J21049). This kind of teaching aid can visualize the motion trajectory, but cannot quantitatively measure the inclination angle; at the same time, it cannot let blind students perceive the motion trajectory, and it is difficult to establish the concept of motion synthesis and decomposition. SUMMARY

[0005] In order to solve the problem that the existing demonstration experiment device and teaching aid cannot solidify and draw touchable motion synthesis and decomposition trajectories, and cannot conduct quantitative inquiry, the utility model provides a demonstration experiment device, which not only can solidify and draw touchable motion synthesis and decomposition trajectories, but also can quantitatively measure the inclination angle of combined motion (combined displacement) relative to the horizontal direction, thereby achieving the teaching purposes of quantitative inquiry, deep learning, barrier-free learning for blind students and meaningful learning.

[0006] The utility model discloses a technical scheme that solves its technical problems is: on the basis of the original teaching aid " motion synthesis decomposition demonstrator (J21049) ", with high temperature 3D printing pen instead of the original magnetic paint brush, let motion trajectory solidification, touchable immediately;Two digital speed regulator is connected with X, Y motor respectively, through the adjustment X, Y motor speed, display X, Y motor speed ratio, can demonstrate uniform linear motion and uniform (variable speed) linear motion various complex motion synthesis decomposition trajectory, let blind person can perceive, understand the mutual angle linear motion's combined motion trajectory may be straight line, also may be curve, benefit student establishes the concept of motion synthesis and decomposition;Introduce the inclination sensor and telescopic metal pole, and blind person can read the specific numerical value of the combined motion (combined displacement) relative to the horizontal direction inclination with the aid of computer and screen reading software OCR identification function, carry out quantitative inquiry, effectively solve the teaching difficulty. The whole experimental device is pasted with braille label, and blind person can also operate the instrument to carry out experimental inquiry. Technology empowerment, defect compensation, realize deep learning, meaningful learning and barrier-free experiment.

[0007] The utility model discloses the beneficial effect is, let motion trajectory solidification, touchable immediately, can adjust motor speed, display X, Y motor speed ratio, can measure the inclination value of combined motion (combined displacement) relative to the horizontal direction simultaneously, and blind person can carry out experimental operation, perceive motion synthesis and decomposition trajectory without barrier, and read the inclination value, can carry out qualitative and quantitative inquiry without barrier.

[0008] Drawings

[0009] Figure 1 It is the panel structure diagram of digital barrier-free motion synthesis decomposition demonstrator.

[0010] Figure 2 It is the control system operation key function diagram of digital barrier-free motion synthesis decomposition demonstrator.

[0011] Figure 3 It is the circuit principle diagram of digital barrier-free motion synthesis decomposition demonstrator.

[0012] Figure 1 The panel structure diagram of digital barrier-free motion synthesis decomposition demonstrator

[0013] 1. Y transmission device (motor)

[0014] 2. Trolley

[0015] 3. Track (metal plate)

[0016] 4. X-axis drive unit (motor)

[0017] 5. Drawing board (white paper)

[0018] 6. High-temperature 3D printing pen and acrylic plastic sheet

[0019] 7. Base (metal plate, including Braille stickers)

[0020] 8. Metal plate (including Braille stickers)

[0021] 9. Control system: including a two-way switch and an X speed control knob, etc.

[0022] 10. X-axis and Y-axis digital display speed controller

[0023] 11. Tilt sensor

[0024] 12. Telescopic metal pole

[0025] Figure 2 Control system operation key layout diagram of the digital barrier-free motion synthesis and decomposition demonstrator

[0026] 1. X-axis demonstration switch

[0027] 2. Y-axis demonstration switch

[0028] 3. Main switch,

[0029] 4. X-axis left and right control switch

[0030] 5. Y-axis up / down control switch

[0031] 6. Y-axis speed control knob

[0032] 7. X-axis speed control knob Detailed Implementation

[0033] Principles of the work

[0034] 1. The motion of an object in any direction can be considered as the superposition of several independent motions. Therefore, the resultant motion of some common curvilinear (linear) motions can be determined using the parallelogram rule; this is called the composition of motion. Conversely, a known resultant motion can be decomposed into component motions in two directions; this is called the decomposition of motion.

[0035] 2. Blind students have limited vision and rely on touch to perceive the position and changes of objects. High-temperature 3D printing pens have the characteristic of melting and solidifying instantly, allowing for the rapid creation of prominent and solidified motion trajectories.

[0036] 3. The 3D printing pen demonstrates the composition of an object participating in two-directional motion simultaneously through the transmission device of two directions (X, Y), and can decompose the combined motion into two-directional partial motion, and directly draw the motion trajectory on the drawing board. Both partial motions can be uniform linear motion, or one can be uniform linear motion and the other can be variable (accelerating or decelerating) linear motion.

[0037] 4. The X, Y direction digital display speed regulator controls the working voltage proportion of the X, Y direction transmission motor respectively. By adjusting the motor working voltage, the speed of the transmission motor in the corresponding direction can be adjusted. When the digital display speed regulator display screen is 100, it indicates that the working voltage ratio of the two-direction transmission motor is 1:1, and the speed ratio is also 1:1.

[0038] 5. When the X, Y directions are both uniform linear motion, the motion starting point and the motion ending point of the 3D printing pen are connected by using the "inclination sensor" and the telescopic metal rod (antenna), so as to display the angle between the combined motion displacement (speed) and the horizontal positive direction on the computer. Blind people can read the angle value by using the screen reading software (OCR recognition function).

[0039] Production materials

[0040] 1. One high-temperature 3D printing pen (10W, 5V, 2A, AC), PLA environmentally friendly consumables.

[0041] 2. One J21049 motion synthesis and decomposition demonstration instrument, including: two motors, one trolley, two size pulley sets (including transmission belts), two cotton wires, two springs, three two-way switches, two speed regulating knobs, etc.

[0042] 3. One inclination sensor, one telescopic metal rod (antenna), two magnetic balls, and one key ring.

[0043] 4. White paper, one Braille label, one Braille writing pen (board), one universal glue, two metal washers with holes, and a direct current power supply (6-8V).

[0044] 5. Two digital display speed regulators, one roll of double-sided adhesive, and several wires.

[0045] 6. Electric soldering iron, electric drill, soldering tin, file, etc.

[0046] 7. Computer (with keyboard), screen reading software (with OCR recognition function), data line, docking station, alternating current power supply, and socket.

[0047] Production method

[0048] Step 1: Remove the moving pulley structure and pen structure (including metal end, cotton wire, spring, etc.) from the J21049 motion synthesis and decomposition demonstration instrument.

[0049] Step 2: Use an electric iron to melt the acrylic plate and widen the brush slot from about 8mm to about 13mm. Then use a file to polish it.

[0050] Step 3: Use an electric drill to drill two small holes with a diameter of 2mm on the edges of the two metal washers.

[0051] Step 4: Use universal glue to fix the 3D printing pen and metal washers, and clamp the acrylic plate.

[0052] Step 5: Use cotton thread and a spring to connect the 3D printing pen and the pulley set, allowing the 3D printing pen to slide freely up and down along the slot under the pulley set.

[0053] Step 6: Attach Braille labels to the corresponding positions of the control panel and 3D printing pen.

[0054] Step 7: Connect the keychain to one end of the sensor and hang it on the upper left corner of the demonstrator. Use a hook to fix the telescopic metal rod and the sensor, so that they are always on the same straight line.

[0055] Step 8: Use universal glue to paste a magnetic bead on the end of the metal rod and near the tip of the 3D printing pen, so that the former can be attracted and fixed when it approaches the latter.

[0056] Specific operation method

[0057] Demonstrate, depict the touchable trajectory of the combined motion, and measure the inclination value of the displacement of the combined motion relative to the horizontal direction.

[0058] (1) X-direction uniform (variable) linear motion

[0059] 1. Adjust the X-direction reversing switch. (Left or right)

[0060] 2. Double-click the 3D printing pen's line switch and press the X-direction motion key at the same time. The 3D printing pen will draw a horizontal trajectory on the white paper.

[0061] 3. Adjust the speed knob, which is the X-direction variable linear motion.

[0062] 4. Allow the blind to touch the X-direction uniform (variable) linear motion trajectory.

[0063] (2) Y-direction uniform (variable) linear motion

[0064] 1. Adjust the Y-direction reversing switch and set the Y-direction speed regulator to the middle position.

[0065] 2. Double-click the 3D printing pen's line switch and press the Y-direction motion key at the same time. The 3D printing pen will draw a vertical trajectory on the white paper.

[0066] 3. Adjust the speed of the Y direction, that is, the Y direction variable speed linear motion.

[0067] 4. The blind can touch the Y direction uniform speed (variable speed) linear motion trajectory.

[0068] (Three) X direction uniform linear motion and Y direction uniform linear motion of the synthesis of motion

[0069] Adjust the X direction and Y direction reversing switch. Then adjust the Y direction speed regulator to the middle position, press the 3D printing pen line switch and the synthesis switch, and the synthesis uniform linear motion trajectory can be seen. The blind can touch the X direction and Y direction synthesis motion trajectory.

[0070] (Four) Measure the angle θ between the combined motion displacement (speed) and the positive direction of the X axis

[0071] 1. After the synthesis of X direction uniform linear motion and Y direction uniform linear motion, keep the 3D printing pen at the end of the motion position B point unchanged.

[0072] 2. Use the small keyboard to operate the computer, open the OCR recognition function of the screen reading software in the computer, enter the DIS Lab 8.0 software system, select and enter the "general software" interface in the main interface. Close channel 2, and uncheck the F and ∠2 checkboxes in channel 1. At this time, check ∠1 in channel 1 interface. ∠1 is the angle θ between the combined motion displacement (speed) and the positive direction of the X axis.

[0073] 3. Properly lengthen the metal rod at the lower end of the inclination sensor, rotate the sensor and metal rod around the motion starting point O point to the right and up to the horizontal position. At the same time, click the ∠1 zero button in the channel 1 interface to zero ∠1. At this time, the computer screen displays the ∠1 value as 0.0°.

[0074] 4. Rotate the metal rod clockwise and stretch it to the vicinity of the 3D printing pen tip. The magnetic beads at the end of the metal rod are automatically attracted and fixed to the magnetic beads near the 3D printing pen tip. At this time, the value of ∠1 displayed on the computer screen is the inclination θ of the combined displacement relative to the horizontal direction.

[0075] 5. Identify "calculation table control" and click "start recording", "stop", "save" and other buttons in turn to save the electronic form to the local. The blind can read the ∠1 value of channel 1 in the electronic form.

[0076] (Five) Synthesis of X direction uniform (variable speed) linear motion and Y direction variable (uniform) linear motion

[0077] Adjust the X and Y direction switch. Then adjust the speed controller to the middle position, press the 3D printing pen into the line switch and the synthesis switch, and slowly adjust the Y direction speed controller (or high or low) to see the curve trajectory. Let the blind touch the X and Y direction synthesis curve trajectory.

[0078] Similarly, the trajectory of the synthesis motion of X direction variable speed straight line motion and Y direction uniform speed straight line motion can also be demonstrated.

[0079] (Six) decomposition of motion

[0080] 1. In the original synthesis motion state, adjust the Y direction switch to the opposite position (right or left) and press the Y direction motion key to move the 3D printing pen to Y = 0, which is the Y direction sub-motion trajectory.

[0081] 2. Adjust the X direction switch to the opposite position and press the X direction motion key to move the 3D printing pen to X = 0 (i.e. the origin), which is the X direction sub-motion trajectory.

[0082] 3. Similarly, X direction can be demonstrated first, and then Y direction, with the same result.

Claims

1. A digital barrier-free motion synthesis and decomposition demonstrator, based on a motor-driven magnetic drawing board motion synthesis and decomposition demonstrator, replaces the magnetic pen with a high-temperature 3D printing pen; a tilt sensor with a retractable antenna is suspended at the left motion starting point; a digital display speed controller for controlling the X and Y direction motors is installed in the lower right corner of the base; its features are: High temperature 3D printing pen follows the motor movement, at the same time, leaving plastic traces on the vertical panel in real time; with angle sensor, magnetic steel ball and antenna to measure the combined displacement angle; with digital speed regulator to adjust the speed of horizontal and vertical motor and display its ratio, for quantitative research.

2. The demonstrator of claim 1, characterized in that: The telescopic antenna end and the side of the 3D printing pen tip magnetic steel ball attraction and telescopic antenna can make the tilt sensor connect with the end state position of the printing pen in real time and quickly, so as to display the combined displacement and its angle.

3. The demonstrator of claim 1, characterized in that: The X, Y direction motor and digital speed regulator circuit are independent parallel circuits, which can be controlled by branch switch; X, Y direction motor and its respective direction digital speed regulator are in series, which can display the speed ratio of X, Y direction motor in real time.

Images