Math Probability Demonstration Device
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.
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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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