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Math Probability Demonstration Device
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A demonstration device and probability technology, applied in the field of mathematics teaching, can solve problems such as large workload and large human error, and achieve the effect of increasing cognition, ingenious structure and avoiding experimental errors.
Active Publication Date: 2018-09-07
YELLOW RIVER CONSERVANCY TECHN INST
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[0020] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a mathematical probability demonstration device, which effectively solves the problems of large workload and large human error in the existing needle throwing experimental device
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Embodiment 1
[0055] Embodiment 1, a kind of mathematical probability demonstrative device, includes analog awesome stick 1, is used for completing the needle throwing experiment of the present invention, in order not to affect the error caused by the structure of the simulated needle stick 1 itself to the experiment, the simulated needle stick 1 is designed as The cylindrical rod body has a uniform length, and the material can be metal, stainless steel, or hard plastic.
[0056] Guide device 2, guide device 2 is a through-pipe placed vertically, and through-pipe is fixed on the rectangular box body 68, and its structure is exactly common cylinder, and there is through-hole in the middle of it, and its diameter size can be simulated needle Stick 1, so that the simulated needle stick 1 falls in a vertical state.
[0057] Needle-throwing device 3, the needle-throwing device 3 is fixed below the guide device 2, the needle-throwing device 3 is not connected to the guide device 2, the needle-thr...
Embodiment 2
[0072] Embodiment 2, on the basis of Embodiment 1, in order to further enhance the diversity of dropping of the needle throwing device 3 and increase the randomness of falling, we also have a third throwing needle in the third throwing needle chamber 8. Pinhole 17, the third needle-throwing hole 17 is the same as the first needle-throwing hole 10 and is all vertically towards the center of circle direction, the third needle-throwing hole 17 is the same as the first needle-throwing hole 10, the second needle-throwing hole 11, the fourth throwing-pin hole The pinholes 12 are all connected, and the first needle-throwing hole 10 and the third needle-throwing hole 17 are equivalent to being vertically connected. The only difference is that the opening size of the third needle-throwing hole 17 is smaller than the opening of the first needle-throwing hole 10. The opening sizes of the second needle-throwing hole 11, the third needle-throwing hole 17, and the fourth needle-throwing hole...
Embodiment 3
[0076] Embodiment 3, on the basis of Embodiment 1, in order to facilitate the production of structures such as installing the baffle plate 19 and manufacturing the radian groove 18, the fixed shell 4 is divided into a front fixed shell and a rear fixed shell, so that the driving structures such as the baffle plate 19 Put them in it, and then fasten them together, and finally they all rotate following the rotation of the first driving motor.
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Abstract
The invention relates to a mathematics probability demonstration device, which effectively solves the problems of large workload and bigger artificial error in the existing needle throwing experimentdevice. The mathematics probability demonstration device is characterized in that the mathematics probability demonstration device comprises a simulation needle bar, a guide device and a needle throwing device, wherein the needle throwing device comprises a fixed casing; the outer side of the fixed casing is connected with fan blades; a cavity between every two fan blades forms a needle throwing cavity; both sides of each of the four needle throwing cavities are respectively sealed, and are integrally connected with the fixed casing; a first needle throwing hole is formed in the first needle throwing cavity and vertically faces the center of circle; a second needle throwing hole is formed in the second needle throwing cavity and slantwise faces the center of circle; a fourth needle throwing hole is formed in the fourth needle throwing cavity and slantwise faces the center of circle; the first needle throwing hole, the second needle throwing hole and the fourth needle throwing hole aremutually communicated; a blocking plate is arranged at an opening of the fourth needle throwing cavity, and the fourth needle throwing cavity is not sealed by the blocking plate; the outer wall of thefixed casing is connected with a first drive motor through a first rotary shaft; a floor box is arranged, and the experiment operability is stronger.
Description
technical field [0001] The invention relates to the technical field of mathematics teaching, in particular to a mathematical probability demonstration device. Background technique [0002] Probability and statistics are one of the basic contents of mathematics teaching and an important part of modern mathematics. However, when learning probability and statistics, students cannot understand them well because of their abstract nature. At the time of the incident, the teacher could only explain to the students by writing on the blackboard. The students could not understand it thoroughly. During the teaching process, they lacked some auxiliary teaching tools for probability and mathematical statistics. Therefore, the learning efficiency of students was low. [0003] In mathematical probability experiments, there are various common probability experiments, such as the most common coin toss experiment, and another kind of probability experiment device will be introduced in the pre...
Claims
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Application Information
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