CN203260232U - Probability experiment teaching aid for university teaching - Google Patents
Probability experiment teaching aid for university teaching Download PDFInfo
- Publication number
- CN203260232U CN203260232U CN 201320322952 CN201320322952U CN203260232U CN 203260232 U CN203260232 U CN 203260232U CN 201320322952 CN201320322952 CN 201320322952 CN 201320322952 U CN201320322952 U CN 201320322952U CN 203260232 U CN203260232 U CN 203260232U
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- coin
- cover plate
- cylinder
- circular hole
- teaching
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Abstract
A probability experiment teaching aid for university teaching belongs to the teaching experiment tool field, solves the problem that an experiment result is substantially affected by factors of an experimenter in an experiment of flipping a coin, and comprises a cylinder, a cover plate and a coin inserting device. The cylinder is transparent; a circular hole with a diameter of 8cm is arranged in a center of the covet plate, and two circular holes with a diameter of 15cm are respectively arranged at two sides of the cover plate; and the cover plate covers an upper end of the cylinder; a rectangle hole for inserting the coin is arranged in a center of the coin inserting device; the coin inserting device is fixedly arranged in the center of the covet plate; and the rectangle hole for inserting the coin is vertical to the cover plate. The probability experiment teaching aid is used for the experiment of flipping the coin in the probability teaching, and avoids the effects of the factors of the experimenter in the experiment of flipping the coin, so that the coin falls on the table or the ground under the same condition.
Description
Technical field
The utility model belongs to the teaching experimental tool field, relates in particular to a kind of Teaching in University Probability Experiments teaching aid.
Background technology
Probability is again probability, represent through a few tenths of or a few percent commonly used in the daily life, several one-tenth assurances that have that it has often been said just refer to probability, several achievements refer to a few tenths of, probability is the comparison abstract concept, to summarize the possibility size that random occurrence occurs under the same terms, in university's Probability Teaching, often do one and simply throw away the coin experiment, by repeatedly throwing away coin, the probability that statistics front side or reverse side make progress obtains 1/2 result at last, although experiment is simple, but can help the student to understand probability and the result who believes probability calculation, so far, throwing away the coin experiment all is that the experimenter directly throws away coin on desktop or the ground with hand, because experimenter's oneself factor, not equal such as the height difference of throwing away coin or angle at every turn, can not guarantee that coin is to fall under the same conditions desktop or ground, even can deliberately make front or reverse side up, very large on the experimental result impact.
Summary of the invention
The purpose of this utility model is to throw away the far-reaching problem of experimental result subject oneself factor in the coin experiment in order to solve, and a kind of Teaching in University Probability Experiments teaching aid is provided, and it thes contents are as follows:
A kind of Teaching in University Probability Experiments teaching aid, it comprises cylinder, cover plate and coin-freed arrangement; Described cylinder is transparent cylinder, and the internal diameter of cylinder is 59cm, and the external diameter of cylinder is 61cm, and the height of cylinder is 30cm; The plate face of cover plate is circular, the diameter of cover plate is 61cm, leave three circular holes on the cover plate, the first circular hole that diameter is 8cm is left in the centre of cover plate, the second circular hole that diameter is 15cm is left on the left side of the first circular hole, the 3rd circular hole that diameter is 15cm is left on the right of the first circular hole, distance between described the first circular hole and the second circular hole is 5cm, distance between described the first circular hole and the 3rd circular hole is 5cm, cover plate covers in described cylinder upper end, cover plate aligns all around with cylinder, the profile of described coin-freed arrangement is rectangular parallelepiped, the length of coin-freed arrangement * wide * height=16cm * 8cm * 30cm, leave a rectangle slot that runs through in the middle of the surface of two 16cm * 8cm of coin-freed arrangement, coin-freed arrangement is fixedly connected on the centre position of cover plate upper surface, and the rectangle slot is vertical with cover plate, and the rectangle slot is corresponding with the first circular hole that arranges on the cover board.
Preferably: the cylinder of described cylinder for being made by transparent organic glass.
The beneficial effects of the utility model are: avoid throwing away the impact of experimental result subject oneself factor in the coin experiment, coin is fallen on desktop or the ground under the same conditions.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of the utility model cover plate.
Embodiment
With reference to figure 1 and Fig. 2, a kind of Teaching in University Probability Experiments teaching aid, it comprises cylinder 1, cover plate 2 and coin-freed arrangement 3; Described cylinder 1 is transparent cylinder, and the internal diameter of cylinder 1 is 59cm, and the external diameter of cylinder 1 is 61cm, and the height of cylinder 1 is 30cm; The plate face of cover plate 2 is circular, the diameter of cover plate 2 is 61cm, leave three circular holes on the cover plate 2, the first circular hole 2-1 that diameter is 8cm is left in the centre of cover plate 2, the second circular hole 2-2 that diameter is 15cm is left on the left side of the first circular hole 2-1, the 3rd circular hole 2-3 that diameter is 15cm is left on the right of the first circular hole 2-1, distance between described the first circular hole 2-1 and the second circular hole 2-2 is 5cm, distance between described the first circular hole 2-1 and the 3rd circular hole 2-3 is 5cm, cover plate 2 covers in described cylinder 1 upper end, cover plate 2 aligns all around with cylinder 1, the profile of described coin-freed arrangement 3 is rectangular parallelepiped, the length of coin-freed arrangement 3 * wide * height=16cm * 8cm * 30cm, leave a rectangle slot 3-1 who runs through in the middle of the surface of two 16cm * 8cm of coin-freed arrangement 3, the size of described rectangle slot 3-1 matches with the size of test with coin, coin-freed arrangement 3 is fixedly connected on the centre position of cover plate 2 upper surfaces, rectangle slot 3-1 is vertical with cover plate 2, and rectangle slot 3-1 is corresponding with the first circular hole 2-1 on being arranged on cover plate 2.
Using method is: the utility model is placed on desktop or the ground, coin is dropped into rectangle slot 3-1, coin drops on cylinder 1 interior desktop or the ground along slot 3-1, after the record coin one side up, hand stretched in the cylinder 1 by the second circular hole 2-2 or the 3rd circular hole 2-3 pick up coin, the test of repeatedly inserting coins.
The utility model principle: the utility model principle is simple, falls to the ground after coin all passes through coin-freed arrangement 3 in each test, and coin is fallen on desktop or ground with equal height and equal angular.
Claims (3)
1. a Teaching in University Probability Experiments teaching aid is characterized in that it comprises cylinder (1), cover plate (2) and coin-freed arrangement (3); Described cylinder (1) is transparent cylinder, and the internal diameter of cylinder (1) is 59cm, and the external diameter of cylinder (1) is 61cm, and the height of cylinder (1) is 30cm; The plate face of cover plate (2) is circular, the diameter of cover plate (2) is 61cm, leave three circular holes on the cover plate (2), the first circular hole (2-1) that diameter is 8cm is left in the centre of cover plate (2), the second circular hole (2-2) that diameter is 15cm is left on the left side of the first circular hole (2-1), the 3rd circular hole (2-3) that diameter is 15cm is left on the right of the first circular hole (2-1), distance between described the first circular hole (2-1) and the second circular hole (2-2) is 5cm, distance between described the first circular hole (2-1) and the 3rd circular hole (2-3) is 5cm, cover plate (2) covers in described cylinder (1) upper end, cover plate (2) aligns all around with cylinder (1), the profile of described coin-freed arrangement (3) is rectangular parallelepiped, the length of coin-freed arrangement (3) * wide * height=16cm * 8cm * 30cm, leave a rectangle slot (3-1) that runs through in the middle of the surface of two 16cm * 8cm of coin-freed arrangement (3), coin-freed arrangement (3) is fixedly connected on the centre position of cover plate (2) upper surface, rectangle slot (3-1) is vertical with cover plate (2), and rectangle slot (3-1) is corresponding with the first circular hole (2-1) on being arranged on cover plate (2).
2. a kind of Teaching in University Probability Experiments teaching aid as claimed in claim 1 is characterized in that the cylinder of described cylinder (1) for being made by transparent organic glass.
3. a kind of Teaching in University Probability Experiments teaching aid as claimed in claim 1 is characterized in that the size of described rectangle slot (3-1) and the size of test with coin match.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320322952 CN203260232U (en) | 2013-06-06 | 2013-06-06 | Probability experiment teaching aid for university teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320322952 CN203260232U (en) | 2013-06-06 | 2013-06-06 | Probability experiment teaching aid for university teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203260232U true CN203260232U (en) | 2013-10-30 |
Family
ID=49472778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320322952 Expired - Fee Related CN203260232U (en) | 2013-06-06 | 2013-06-06 | Probability experiment teaching aid for university teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203260232U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104715655A (en) * | 2015-04-01 | 2015-06-17 | 白依川 | Advanced mathematics probability presentation device |
| CN108961937A (en) * | 2018-08-09 | 2018-12-07 | 许昌学院 | A kind of higher mathematics teaching demonstration device and application method |
| CN113223380A (en) * | 2021-05-20 | 2021-08-06 | 电子科技大学成都学院 | Mathematics probability learning device |
-
2013
- 2013-06-06 CN CN 201320322952 patent/CN203260232U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104715655A (en) * | 2015-04-01 | 2015-06-17 | 白依川 | Advanced mathematics probability presentation device |
| CN108961937A (en) * | 2018-08-09 | 2018-12-07 | 许昌学院 | A kind of higher mathematics teaching demonstration device and application method |
| CN113223380A (en) * | 2021-05-20 | 2021-08-06 | 电子科技大学成都学院 | Mathematics probability learning device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131030 Termination date: 20140606 |