CN213751587U - Switch type electromagnetic oscillation experiment demonstration device with auxiliary experiment pre-learning function - Google Patents
Switch type electromagnetic oscillation experiment demonstration device with auxiliary experiment pre-learning function Download PDFInfo
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- CN213751587U CN213751587U CN202120070070.XU CN202120070070U CN213751587U CN 213751587 U CN213751587 U CN 213751587U CN 202120070070 U CN202120070070 U CN 202120070070U CN 213751587 U CN213751587 U CN 213751587U
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Abstract
The utility model discloses a switch-type electromagnetic oscillation experiment presentation device with supplementary experiment preview function, which comprises a single chip microcomputer, the constant amplitude oscillation module, the ringing module, inductance switching module, touch screen display module and constant voltage power supply module combine together, pass through LCD touch screen module with electromagnetic oscillation's physical principle and show, supplementary preview and switch switching parameter function have been increased to the student, the not enough of original experimental apparatus has been compensatied, it is very directly perceived that the demonstration of experiment result is, the experiment operation is more simple and convenient, to the equipment level that improves experiment effect and promotion physics experiment teaching equipment, positive impetus has.
Description
Technical Field
The utility model relates to a physics experiment presentation device, in particular to switch mode electromagnetic oscillation experiment presentation device with supplementary experiment preview function.
Background
In the teaching of physics electromagnetic oscillation, the existing electromagnetic oscillation demonstrator manually pulls and inserts a lead to operate and cooperate with a large-scale electric meter, so that a pointer swings back and forth to demonstrate the electromagnetic oscillation. The disadvantages with this approach are: firstly, the device has no experiment pre-study function, and the experiment pre-study can only be realized by adopting a traditional paper mode; secondly, the instrument adopts a method of pulling out a plug wire to realize the charge and discharge of the capacitor, and the method has higher realization difficulty and inconvenient operation; thirdly, a voltmeter and an ammeter are adopted to indicate the change of the voltage and current parameters, so that the error is large and the accuracy is low.
Disclosure of Invention
In order to solve the technical problem, the utility model discloses a switch mode electromagnetic oscillation experiment presentation device with supplementary experiment preview function, its technical scheme is:
the device is arranged in a box body and comprises a constant amplitude oscillation module, a damping oscillation module, a single chip microcomputer, an inductance switching module, a touch screen display module and a voltage-stabilized power supply module, wherein the touch screen display module is arranged on the outer surface of the box body;
the output ends of the constant-amplitude oscillation module, the amplitude-reducing oscillation module, the touch screen display module and the voltage-stabilizing power supply module are respectively connected with the input end of the single chip microcomputer, the output end of the single chip microcomputer is connected with the input end of the touch screen display module, the output end of the inductance switching module is respectively connected with the input ends of the constant-amplitude oscillation module and the amplitude-reducing oscillation module, and the amplitude-reducing oscillation module and the constant-amplitude oscillation module share one set of oscillation triode circuit.
Further, the single chip microcomputer adopts STM32F103 series.
Furthermore, the voltage-stabilized power supply module is a direct-current voltage-stabilized power supply module, adopts an integrated switch power supply as a power supply of the system, and supplies power to the singlechip.
Furthermore, the inductance switching module is used for switching the sizes of the oscillating coils in the constant-amplitude oscillating module and the amplitude-reduction oscillating module, so that the aim of generating different amplitude oscillations is fulfilled.
Furthermore, the output waveforms of the constant amplitude oscillation module and the amplitude reduction oscillation module are displayed by the touch screen display module through the single chip microcomputer.
Furthermore, the touch screen display module adopts an LCD touch screen display module.
Further, a PA0 terminal and a PA1 terminal are respectively used as analog quantity input terminals of output signals of the constant amplitude oscillation module and the amplitude reduction oscillation module.
The utility model has the advantages that: the utility model discloses a switch-type electromagnetic oscillation experiment presentation device with supplementary experiment preview function, adopt the singlechip, the constant amplitude oscillation module, the ringing module, inductance switching module, touch screen display module and constant voltage power supply module combine together, pass through LCD touch screen module with electromagnetic oscillation's physical principle and show, the device has made the method that is different from inductance and electric capacity in the manual plug wire mode changes the circuit, supplementary preview function has been increased to the student, original experimental apparatus's not enough has been remedied, the demonstration of its experimental result is very directly perceived, make the experiment operation more simple and convenient, the error is little, the degree of accuracy is high, to the equipment level that improves experiment effect and promotion physics experiment teaching equipment, positive impetus has.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a schematic circuit diagram of an inductor switching module;
FIG. 3 is a schematic diagram of a circuit connection of a constant amplitude oscillation module;
FIG. 4 is a schematic diagram of the connection of the capacitor and the inductor of the ringing module circuit;
fig. 5 is a schematic diagram of a circuit for connecting the single chip microcomputer and the touch screen.
Detailed Description
As shown in the figure, the utility model discloses a switch-type electromagnetic oscillation experiment presentation device with supplementary experiment preview function, the circuit of this device mainly comprises constant amplitude oscillation module, amplitude reduction oscillation module, embedded STM32 single chip module, voltage/current display module, touch-sensitive screen display module and constant voltage power supply module.
The first and the second main modules are explained in detail as follows:
(1) a core control panel module:
and an STM32F103 series single chip microcomputer control panel is adopted as the core of the whole system.
(2) D, a direct-current stabilized power supply module:
the module adopts an integrated switch power supply as a power supply of a system, and mainly converts 220V alternating current into a +5V power supply required by the system through the switch module to provide a direct current power supply for each module of the system. Meanwhile, the +5V power supply is converted into a 3.3V power supply through the HX1117 power supply conversion module, so that a power supply is provided for the embedded STM32F103 single chip microcomputer.
(3) An inductance switching module:
the part is used for switching the size of the oscillating coil in constant amplitude oscillation and amplitude reduction oscillation, and the purpose of generating different amplitude oscillations is achieved. The circuit principle is shown in fig. 2. In the figure, L10, L11, and L12 serve as switching inductances for constant amplitude oscillation, and L20 and L21 serve as switching inductances for amplitude reduction oscillation.
(4) The constant amplitude oscillation module:
the constant amplitude oscillation is realized by adopting a resonance circuit of LC, and the circuit connection is shown in figure 3. In the figure, a triode Q1 is taken as a central resonant circuit, the oscillation capacitors are C11 and C12, and the oscillation inductors are L10, L11 and L12 in an inductance switching circuit; s11 is a capacitance change-over switch of constant amplitude oscillation, S12 is an inductance change-over switch of constant amplitude oscillation; s13 is a constant amplitude oscillation changeover switch for turning on and off the constant amplitude oscillation.
(5) A ringing module:
the amplitude-reducing oscillation and the constant-amplitude oscillation share one set of oscillation triode circuit, the main difference between the amplitude-reducing oscillation and the constant-amplitude oscillation is that the oscillation capacitance and the inductance are different, and the switching can be realized through the switch. The connection is shown in fig. 4. In the figure, the oscillation capacitors are C21 and C22, and the oscillation inductors are L20 and L21 in an inductance switching circuit; s21 is a switch for switching between the oscillating inductors L20 and L21, S22 is a switch for switching between charging and discharging of the capacitor C21, S23 is a switch for switching between charging and discharging of the capacitor C22, and S24 is a switch for switching between the oscillating capacitors C21 and C22; s25 is a ringing switcher for turning ringing on and off.
(6) The touch screen display module is connected with the controller:
the module is used for displaying main experimental contents of constant amplitude oscillation and amplitude reduction oscillation, and the switching of the screen is realized through the touch key, so that the conversion of the displayed contents can be realized. In addition, the output waveforms of the constant amplitude oscillation and the ringing are also displayed on the touch screen so as to visually observe the waveform changes of the two oscillations. In order to improve the display effect, a 3.5-inch TFT liquid crystal display module is selected in the design, the module has the touch screen function, and the connection principle with the STM32F103 is shown in FIG. 5.
Control line: RS-PA 5; WR-PA 3; RD-PA 4; CS-PA 2; RST-PA 12;
the data line comprises DB0-DB15 which are sequentially connected with PB0-PB15;
touch function connection mode:
P_CLK –PC0；P_CS-PC1； P_MOSI - PC2；P_BUSY – PC3；
P_MISO –PC4； P_PEN –PC5.
AD conversion line: PA0 and PA1 act as analog inputs for the constant amplitude (fig. 3) and ringing (fig. 4) output signals, respectively.
Second, experimental operation and Main function
1. Constant amplitude oscillation demonstration experiment
Connecting the wiring, switching on a power supply, adjusting a potentiometer to realize constant amplitude oscillation, and observing the condition of constant amplitude oscillation waveform through a touch screen display; the size of the capacitor and the inductor is changed, so that constant-amplitude oscillation with different frequencies can be formed;
2. demonstration experiment of amplitude reduction oscillation
Connecting the wiring, switching on a power supply, adjusting a potentiometer to realize amplitude reduction oscillation, and observing the waveform condition of the amplitude reduction oscillation through a touch screen display; amplitude-reducing oscillation with different frequencies can be formed by changing the sizes of the capacitor and the inductor;
3. experiment content display and preview
Through the touch-sensitive screen of instrument self-carrying, can realize the switching and the demonstration of experiment content, the experiment content is in advance studied to this function of final student's accessible, can improve whole experiment effect like this.
4. And the waveforms of the amplitude-reducing oscillation and the constant-amplitude oscillation are displayed by a digital LCD, so that the experimental phenomenon observed by students is more visual.
The device adds an auxiliary experiment pre-learning function and makes up the defects of the original experimental device; the physical principle of electromagnetic oscillation (constant amplitude oscillation and amplitude reduction oscillation) is utilized, and the real-time display of the voltage and current waveforms of the electromagnetic oscillation is realized on the large-screen LCD touch screen module, so that the result display is very visual. The device makes a method different from a method of replacing the inductor and the capacitor in the circuit by manually plugging and unplugging the wires, so that the experimental operation is simpler and more convenient.
By utilizing the embedded single-chip microcomputer technology and the physical principle of electromagnetic oscillation and combining the touch screen LCD display technology, the functions of content preview, voltage and current waveform digital display, automatic switching of two oscillation modes and the like of an electromagnetic oscillation experiment are realized. By means of the switching function of the toggle switch, the defect of inconvenient operation caused by a manual plugging and unplugging switching mode of the original equipment is overcome. The device has reached the designing requirement through the experiment, to improving middle school electromagnetic oscillation experimental effect, promotes the equipment level of physics experiment teaching equipment, all has positive impetus.
The above detailed description is provided for the examples of the present invention, but the present invention is only the preferred embodiments of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.
Claims (7)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120070070.XU CN213751587U (en) | 2021-01-12 | 2021-01-12 | Switch type electromagnetic oscillation experiment demonstration device with auxiliary experiment pre-learning function |
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| CN202120070070.XU CN213751587U (en) | 2021-01-12 | 2021-01-12 | Switch type electromagnetic oscillation experiment demonstration device with auxiliary experiment pre-learning function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114141114A (en) * | 2021-11-29 | 2022-03-04 | 南京工业大学 | High-voltage gas discharge virtual simulation experiment system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114141114A (en) * | 2021-11-29 | 2022-03-04 | 南京工业大学 | High-voltage gas discharge virtual simulation experiment system |
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