CN109166412A - A kind of demonstration of Probability Teaching and statistic device - Google Patents
A kind of demonstration of Probability Teaching and statistic device Download PDFInfo
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- CN109166412A CN109166412A CN201811285486.2A CN201811285486A CN109166412A CN 109166412 A CN109166412 A CN 109166412A CN 201811285486 A CN201811285486 A CN 201811285486A CN 109166412 A CN109166412 A CN 109166412A
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- slide bar
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/02—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for mathematics
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- Pure & Applied Mathematics (AREA)
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- Business, Economics & Management (AREA)
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- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The present invention relates to a kind of demonstration of Probability Teaching and statistic devices, including shell, cam is connected with through shaft on the shell, there is the slide bar that the axis along shaft radially slides on shell, elastic force of the slide bar through spring slides on shell to the axis direction of shaft, contacts one end of the close shaft of slide bar with the extruding of the outer circumference surface of cam；Have on shell and rotor, the rotor are connected and composed by sleeve and along multiple ends that the circumference of sleeve is distributed in sleeve periphery；There is infrared counting device on shell, the infrared counting device includes infrared inductor, counter and display, infrared inductor is for emitting infrared signal and feeding back end described in any moment to the block in real time state of infrared signal, there is the contact-making switch for controlling infrared inductor on the shell, there is mandril on the slide bar, when slide bar slides into end of travel in this direction to periphery, mandril, which is pressed into contact with switch, is closed contact-making switch.
Description
Technical field
The present invention relates to teaching aid, especially a kind of Probability Teaching demonstration and statistic device.
Background technique
During Probability Teaching, in order to allow the distribution and statistical conditions of classmates' intuitivism apprehension probability, usually to use
Various apparatus for demonstrating can both express probability event vividly, can also be improved the learning interest of classmates；But mesh
Preceding common demonstration device for probability is still limited to coin throwing, bead falls this cumbersome uninteresting analogy method, is unfavorable for
The continuous demonstration and a large amount of statistics of probability event, while also classmates can be made to be confined in this natural mode, greatly limit
The thinking of classmates dissipates ability.
In addition, existing apparatus since dependent on coin or bead etc., volume is more huge, is carried and is saved more
Trouble is not easy to classroom instruction use, and each use, which finishes, also to be needed to reset on coin or bead, and operation is extremely inconvenient, is occupied
More time in classroom.
Summary of the invention
For above situation, to make up technical deficiency present in the prior art, the present invention provides a kind of Probability Teaching and drills
Show and statistic device, it is intended to solve it is existing in the prior art it is cumbersome, statistics number is limited, analog demenstration method tradition is single
One the problem of.
Its technical solution solved is: including shell, being connected with cam through shaft on the shell, has on shell along shaft
The slide bar that radially slides of axis, elastic force of the slide bar through spring slides on shell to the axis direction of shaft, makes leaning on for slide bar
One end of nearly shaft is contacted with the extruding of the outer circumference surface of cam；Have on shell and rotor, the rotor is by sleeve and along sleeve
Multiple ends that circumference is distributed in sleeve periphery connect and compose；There are infrared counting device, the infrared counting device packet on shell
Infrared inductor, counter and display are included, infrared inductor is for emitting infrared signal and feeding back end described in any moment
To the block in real time state of infrared signal, there are the contact-making switch for controlling infrared inductor, the slide bar on the shell
On have mandril, when slide bar slides into end of travel in this direction to periphery, mandril be pressed into contact with switch make contact open
It closes and closes.
Operation of the present invention is convenient, really reflects occurrence of random events process, greatly simplify chance event demonstration and
The step of statistics, shortens the time of demonstration and statistics, and statistics number is not restricted by external condition, can carry out chance event
Real-time sampling is to realize the continuous express statistic demonstrated with large sample；Meanwhile high-efficient, the portability of the present invention demonstration and statistics
It is good, it is convenient to take and save at any time.
Detailed description of the invention
Fig. 1 is main view of the invention.
Fig. 2 is A-A diagrammatic cross-section of the invention.
Fig. 3 is the enlarged drawing of part B in Fig. 2 of the invention.
Fig. 4 is isometric cutaway view of the invention.
Specific embodiment
Below in conjunction with attached drawing, specific embodiments of the present invention will be described in further detail.
It is provided by Fig. 1 to Fig. 4, the present invention includes shell 1, is connected with cam through vertically arranged shaft 2 on the shell 1
3, there is the slide bar 4 that the axis along shaft 2 radially slides on shell 1, slide bar 4 is connect with shell 1 through spring 5, in the elastic force of spring 5
Under effect, slide bar 4 is slided on shell 1 to the axis direction of shaft 2, makes one end of the close shaft 2 of slide bar 4 and cam 3
Outer circumference surface squeezes contact, when cam 3 is along 2 eccentric rotary of shaft, extruding force and spring 5 of the slide bar 4 in 3 outer circumference surface of cam
Elastic force effect lower generate radial reciprocatingly slide；There is rotor 6 corresponding with slide bar 4 on shell 1, the rotor 6 is by 61 He of sleeve
It is connected and composed along multiple ends 62 that the circumference of sleeve 61 is distributed in 61 periphery of sleeve；Have on shell 1 corresponding with rotor 6
Infrared counting device 7, the infrared counting device 7 include infrared inductor 71, counter 72 and display 73, and infrared inductor 71 is used
In transmitting infrared signal and end 62 described in any moment is fed back to the block in real time state of infrared signal, is had on the shell 1
For controlling the contact-making switch 8 of infrared inductor 71, have on the slide bar 4 with the mandril 9 disposed in parallel of slide bar 4, when slide bar 4
When radially sliding to periphery to end of travel in this direction, mandril 9, which is pressed into contact with switch 8, is closed contact-making switch 8, red
Whether the outer starting of inductor 7 simultaneously has end 62 to infrared ray this moment to the rotation path of the end 62 transmitting infrared ray to detect
It is formed and is stopped, while result is fed back into counter 72 and carries out a statistical counting, be then sent to statistical counting result aobvious
Show that device 73 is shown.
Preferably, the shaft 2 drives through rocking handle 10, the rotor 6 is driven by motor 11.
Preferably, the slide bar 4, spring 5, rotor 6, infrared counting device 7, contact-making switch 8 and mandril 9 have respectively it is more
A and correspond, multiple slide bars 4, multiple springs 5, multiple rotors 6, multiple contact-making switches 8 and multiple mandrils 9 are distinguished
Circumference along shaft 2 is distributed.
Preferably, the end 62 be sphere, the distance between described end 62 of adjacent two with it is described
The size of end 62 matches, the infrared ray direction of the launch of infrared counting device 7 is parallel with the axis of the sleeve 61 and process described in
The circular-rotation path of the centre of sphere of end 62；The setting can ensure that in 6 rotation process of rotor, between end 62 and adjacent end portion 62
The interval centre of sphere that appears in the end 62 circular-rotation path on any point probability it is identical, to guarantee Random event
The accuracy of part.
Preferably, the cam 3 is disc cam.
Preferably, the cam 3 is and the eccentric eccentric wheel connecting of shaft 2.
Preferably, have on the shell 1 with the matched translucent cover 12 of rotor 6, the translucent cover 12 both can guarantee turn
Safety when son 6 is run can also carry out the operating status of rotor 6 to observe the exception to find emerged in operation in time in real time,
It avoids influencing using effect.
The present invention is in use, starting motor 11 rotates rotor 6 persistently, and rotation crank 10 rotates crank 2,3 edge of cam
2 eccentric rotary of shaft, slide bar 4 generate radial reciprocal sliding under the extruding force of 3 outer circumference surface of cam and the elastic force effect of spring 5
It is dynamic；During 4 radial direction of slide bar reciprocatingly slides, slide bar 4 slides into the end of travel of its centrifugation sliding, infrared inductor 71 every time
It carries out an infrared ray and stops to detect and emit a consequential signal pulse to counter 72, stopped with infrared ray by end 62
Result be 1, the result that infrared ray is not stopped by end 62 is 0, and result is carried out a statistical counting by counter 72, and will not
Same result is sent to display 73 and is shown respectively.
Since the stabilization of speed of motor 11 is not influenced by other component, clearly it can not know or push away by range estimation
Calculate the revolving speed of rotor 6 and the real time position of end 62, and speed when due to manual rotation crank 10 can not define and can not
Reach the stabilization of revolving speed, therefore the intervention time of infrared counting device 7 also has uncertainty every time；Meanwhile manual rotation crank 10
It is operation independent of each other with motor driven rotor 6, therefore there is no determining speed corresponding relationship, corresponding slide bars 4 between the two
Corresponding relationship is also not present in relative position between end 62；Therefore, the result of statistical counting every time during aforesaid operations
It is completely random, so that the generation process of chance event is really reflected, so that the real result of statistical counting is accurate.
In addition, according to slide bar 4, rotor 6, infrared counting device 7, contact-making switch 8 and mandril 9 corresponding relationship, be arranged multiple groups
Above-mentioned technical characteristic can make the every rotation of rocking handle 10 can be obtained multiple groups test data in one week, both improve test efficiency, can also incite somebody to action
Multiple groups result compares and analyzes, to keep the result of chance event more accurate credible.
Test statistics can be also carried out to the chance event of more results using the present invention, multiple results need to be only arranged in rotor
It on 6 and distinguishes, such as: multiple ends 62 a) being subjected to color separator and replace infrared sense using color mark sensor
Answer device 71；B) multiple ends 62 are carried out replacing infrared inductor apart from differentiation and using range sensor along the axial of sleeve 61
71；C) multiple ends 62 are subjected to light transmittance differentiation and replace infrared inductor 71 using photoelectric sensor；No matter which kind of is arranged
Mode can get ideal test result, but should illustrate, in enumerated set-up mode, abutting end
Gap between portion 62 and non-random events as a result, therefore it is ensured that there is no between circumferencial direction between adjacent end 62
Gap keeps test result more accurate.
Structure of the invention is ingenious, and it is convenient to operate, and not only really reflects occurrence of random events process, also simplifies simultaneously
The step of chance event demonstration and statistics, the time of demonstration and statistics is shortened, and statistics number is not restricted by external condition, managed
By the express statistic for the continuous demonstration and large sample that can above carry out chance event.
Meanwhile the present invention has abandoned the test methods such as traditional coin is thrown, bead is fallen, so that the demonstration of chance event
It is not necessarily dependent on coin or bead etc., greatly reduces the volume of experimental rig, not only improves demonstration and statistical efficiency, but also tool
Standby good portability, it is convenient to take and save at any time；In addition, the demonstration mode of chance event of the present invention is different from
Traditional demonstration mode assists in classmates' profound understanding chance event and is not limited to that textbook is contained and classroom is learned,
But it is widely present in daily life, the learning interest for being conducive to the divergent thinking for cultivating classmates and improving classmates.
Claims (7)
1. a kind of Probability Teaching demonstration and statistic device, including shell (1), which is characterized in that through shaft on the shell (1)
(2) it is connected with cam (3), the slide bar (4) for having the axis along shaft (2) to radially slide on shell (1), slide bar (4) is through spring (5)
Elastic force on shell (1) to the axis direction of shaft (2) slide, make one end and the cam of the close shaft (2) of slide bar (4)
(3) outer circumference surface squeezes contact；Have on shell (1) with rotor (6), the rotor (6) is by sleeve (61) and along sleeve (61)
Circumference be distributed in multiple ends (62) of sleeve (61) periphery and connect and compose；There are infrared counting device (7) on shell (1),
The infrared counting device (7) includes infrared inductor (71), counter (72) and display (73), and infrared inductor (71) is used for
Transmitting infrared signal simultaneously feeds back end described in any moment (62) to the block in real time state of infrared signal, on the shell (1)
There is the contact-making switch (8) for controlling infrared inductor (71), there are mandril (9) on the slide bar (4), when slide bar (4) is to circle
When all outsides slide into end of travel in this direction, mandril (9), which is pressed into contact with switch (8), is closed contact-making switch (8).
2. a kind of Probability Teaching demonstration according to claim 1 and statistic device, which is characterized in that shaft (2) is through rocking handle
(10) it drives, the rotor (6) is driven by motor (11).
3. a kind of Probability Teaching demonstration according to claim 1 and statistic device, which is characterized in that slide bar (4), spring
(5), rotor (6), infrared counting device (7), contact-making switch (8) and mandril (9) have multiple respectively and correspond, and described is multiple
Slide bar (4), multiple springs (5), multiple rotors (6), multiple contact-making switches (8) and multiple mandrils (9) are respectively along the axis of shaft (2)
Line circle distribution.
4. a kind of Probability Teaching demonstration according to claim 1 and statistic device, which is characterized in that the end (62) is
Sphere, the distance between described end (62) of adjacent two match with the size of the end (62), infrared counting device (7)
The infrared ray direction of the launch is parallel with the axis of the sleeve (61) and passes through the rotation path of the centre of sphere of the end (62).
5. a kind of Probability Teaching demonstration according to claim 1 and statistic device, which is characterized in that cam (3) is dish type
Cam.
6. a kind of Probability Teaching demonstration according to claim 1 and statistic device, which is characterized in that cam (3) is and turns
The eccentric wheel of the eccentric connection of axis (2).
7. a kind of Probability Teaching demonstration according to claim 1 and statistic device, which is characterized in that have on shell (1) with
Rotor (6) matched translucent cover (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811285486.2A CN109166412B (en) | 2018-10-31 | 2018-10-31 | Probability teaching demonstration and statistics device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811285486.2A CN109166412B (en) | 2018-10-31 | 2018-10-31 | Probability teaching demonstration and statistics device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109166412A true CN109166412A (en) | 2019-01-08 |
| CN109166412B CN109166412B (en) | 2020-08-07 |
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ID=64875502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811285486.2A Expired - Fee Related CN109166412B (en) | 2018-10-31 | 2018-10-31 | Probability teaching demonstration and statistics device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109166412B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111312030A (en) * | 2019-12-13 | 2020-06-19 | 吉林师范大学 | Probability statistics teaching presentation device |
| CN114993141A (en) * | 2022-07-18 | 2022-09-02 | 烟台市那些花儿园艺科技股份有限公司 | Forest size measuring instrument |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111312030A (en) * | 2019-12-13 | 2020-06-19 | 吉林师范大学 | Probability statistics teaching presentation device |
| CN114993141A (en) * | 2022-07-18 | 2022-09-02 | 烟台市那些花儿园艺科技股份有限公司 | Forest size measuring instrument |
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| Publication number | Publication date |
|---|---|
| CN109166412B (en) | 2020-08-07 |
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Granted publication date: 20200807 Termination date: 20211031 |