CN102034384A - Device for demonstrating uniformly accelerated motion - Google Patents
Device for demonstrating uniformly accelerated motion Download PDFInfo
- Publication number
- CN102034384A CN102034384A CN2009102047726A CN200910204772A CN102034384A CN 102034384 A CN102034384 A CN 102034384A CN 2009102047726 A CN2009102047726 A CN 2009102047726A CN 200910204772 A CN200910204772 A CN 200910204772A CN 102034384 A CN102034384 A CN 102034384A
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- stepper motor
- stepping motor
- accelerated motion
- rotating shaft
- motor driver
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Abstract
The invention relates to a device for demonstrating uniformly accelerated motion, which uses the parallel interface of a computer as the output of a pulse signal, adopts the frequency of the pulse signal to control the rotational speed of a stepping motor, and aims to ensure that high school students have a visual and intuitive understanding of the uniformly accelerated motion of an object. In the technical scheme, the invention is characterized in that a lead foot 2 of a computer parallel port (1) is connected with the signal input end of an infrared transmission circuit (2); the signal output end of an infrared receiving circuit (3) is connected with the CP- end of a stepping motor driver (4), the CP+ end and the CW+ end of the stepping motor driver (4) are connected with a +5V, the CW- end is connected with the ground, and the A+ end, the A- end, the B+ end and the B- end are respectively connected with a stepping motor (5); the rotating shaft of the stepping motor (5) is fixed with a driving gear (6); the driving gear (6) is matched with a transmission gear (7) at the rear axle of a handcart (9); and the transmission gear (7) is fixed with a rotating shaft (8) at the rear axle of the handcart. The device is suitable for high school students and secondary school students to do physical experiments.
Description
This experimental provision of technical field is to utilize the output of the parallel interface of computing machine as pulse signal, the rotating speed of the frequency control stepper motor of pulse signal.
Background technology is all talked about the equal accelerated motion of object in the physics teaching material of existing senior middle school, but at present the neither one experimental provision can image, demonstrate this characteristics of motion intuitively, to the beginner understanding of this notion has been brought difficulty.
Summary of the invention has an image, is familiar with intuitively the equal accelerated motion of object in order to make the high school student, the purpose of this invention is to provide a kind of equal accelerated motion apparatus for demonstrating.The technical solution adopted for the present invention to solve the technical problems is: the pin 2 of computer parallel interface (1) links to each other with the signal input part of infrared emission circuit (2); The signal output part of infrared receiving circuit (3) links to each other with the CP-end of stepper motor driver (4), CP+, the CW+ of stepper motor driver (4) connect+5V, CW-holds ground connection, A+, A-, B+, B-end link to each other with stepper motor (5) respectively, the rotating shaft of stepper motor (5) and driven wheel (6) are fixing, driven wheel (6) matches with the back axle transmission gear (7) of dolly (9), and transmission gear (7) is fixing with the back axle rotating shaft (8) of dolly.
The invention has the beneficial effects as follows: can demonstrate all acceleration or all retarded motions of object, make the student image be arranged, be familiar with intuitively the equal accelerated motion rule of object with certain initial velocity.
Appended drawings 1 is the schematic diagram of equal accelerated motion apparatus for demonstrating.Among the figure main frame parallel interface (1), infrared transmitter (2), infrared radiation receiving circuit (3), stepper motor driver (4), stepper motor (5), driven wheel (6), transmission gear (7), back axle rotating shaft (8), dolly (9).Fig. 2 is the program flow diagram of timer control 1.Fig. 3 is the program flow diagram of timer control 2.
2, the pin 2 of computer parallel interface (1) links to each other with the signal input part of infrared emission circuit (2); The signal output part of infrared receiving circuit (3) links to each other with the CP-end of stepper motor driver (4), CP+, the CW+ of stepper motor driver (4) connect+5V, CW-holds ground connection, A+, A-, B+, B-end link to each other with stepper motor (5) respectively, the rotating shaft of stepper motor (5) and driven wheel (6) are fixing, driven wheel (6) matches with the back axle transmission gear (7) of dolly (9), and transmission gear (7) is fixing with the back axle rotating shaft (8) of dolly.
3, with VB language compilation control program, download TVicLPT parallel interface special software, and it is joined in the VB toolbar as Active X control, in control program, add timer control 1, the Timer1.interval value is 1000 milliseconds, timer control 1 per second triggers once, carrying out a t=t+1 calculates, according to V=at, determine the number of pulses that in 1 second, produces with the size of V, in control program, add timer control 2, number of pulses according to timer 1 generation, determine that the Timer2.interval value is 1/2nd of the pulsating wave cycle,, make the pin 2 of computer printer port (1) produce the recurrent pulses ripple that height changes with " TVicLPT1.Pin (2)=[value] " order, its output frequency is the highest to be 250HZ, cycle is 4 milliseconds, and as the pulse input signal of stepper motor rotation, its process flow diagram is seen Fig. 2 and Fig. 3.
With V=at, a=1 is the change procedure that example illustrates equal accelerated motion speed below:
As t=1 during second, V=1, Timer2.interva=500 promptly produces 1 pulsating wave in 1 second.
As t=2 during second, V=2, Timer2.interval=250 promptly produces 2 pulsating waves in 1 second.
As t=3 during second, V=3, Timer2.interval=166 promptly produces 3 pulsating waves in 1 second.
……
As t=250 during second, V=250, Timer2.interval=2 promptly produces 250 pulsating waves in 1 second.
4, selecting step angle for use is the high-speed stepper motor of 1.8 degree.
5, this control program moves under windows XP operating system.
Claims (1)
1. equal accelerated motion apparatus for demonstrating, be to be assembled and formed by computing machine and parallel interface, infrared transmitter, infrared radiation receiving circuit, stepper motor driver, stepper motor, dolly, it is characterized in that: the pin 2 of computer parallel interface (1) links to each other with the signal input part of infrared emission circuit (2); The signal output part of infrared receiving circuit (3) links to each other with the CP-end of stepper motor driver (4), CP+, the CW+ of stepper motor driver (4) connect+5V, CW-holds ground connection, A+, A-, B+, B-end link to each other with stepper motor (5) respectively, the rotating shaft of stepper motor (5) and driven wheel (6) are fixing, driven wheel (6) matches with the back axle transmission gear (7) of dolly (9), and transmission gear (7) is fixing with the back axle rotating shaft (8) of dolly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102047726A CN102034384A (en) | 2009-09-30 | 2009-09-30 | Device for demonstrating uniformly accelerated motion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102047726A CN102034384A (en) | 2009-09-30 | 2009-09-30 | Device for demonstrating uniformly accelerated motion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102034384A true CN102034384A (en) | 2011-04-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102047726A Pending CN102034384A (en) | 2009-09-30 | 2009-09-30 | Device for demonstrating uniformly accelerated motion |
Country Status (1)
| Country | Link |
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| CN (1) | CN102034384A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102306465A (en) * | 2011-07-11 | 2012-01-04 | 北京邮电大学 | Coupling simple-pendulum experimental device built by using small magnetic steel and measurement method thereof |
-
2009
- 2009-09-30 CN CN2009102047726A patent/CN102034384A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102306465A (en) * | 2011-07-11 | 2012-01-04 | 北京邮电大学 | Coupling simple-pendulum experimental device built by using small magnetic steel and measurement method thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110427 |