Mathematical probability demonstration device used for Pufeng needle throwing experiment

A demonstration device and experiment technology, applied in the direction of educational tools, teaching models, instruments, etc., can solve the problems that students cannot deepen their understanding of probability, cannot feel the experimental process, and consume manpower and material resources, so as to save manpower and material resources, facilitate learning, The effect of deepening the understanding of probability

Active Publication Date: 2019-04-16
HARBIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Wall chart explanations are abstract and difficult to understand; the original experiment is often carried out by one person throwing the needle while the other person counts. Due to the large number of experiments required, a lot of manpower and material resources are consumed, which affects the efficiency of the experiment; computer simulation experiments When students are unable to participate in the probability experiment, they cannot feel the actual experimental process, so that students cannot deepen their understanding of probability

Method used

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  • Mathematical probability demonstration device used for Pufeng needle throwing experiment
  • Mathematical probability demonstration device used for Pufeng needle throwing experiment
  • Mathematical probability demonstration device used for Pufeng needle throwing experiment

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specific Embodiment approach 1

[0015] Specific implementation mode one: as Figure 1~Figure 4 As shown, the present invention discloses a mathematical probability demonstration device for Buffon's needle throwing experiment, comprising a base plate 1, a receiving plate 2, a storage battery 2-4, a display screen 2-5, a single-chip microcomputer 2-6, a left and right adjustment mechanism, Up and down adjustment mechanism, emission mechanism, a plurality of infrared transmitters 2-1 and a plurality of infrared receivers 2-3, one side of the bottom plate 1 is connected with the left and right adjustment mechanism, and the left and right adjustment mechanism is connected with the emission mechanism. The lower end of the launching mechanism is slidingly connected with the other side of the base plate 1 (the other side of the upper surface of the base plate 1 is provided with two chute A along the left and right direction, and each of the chute A is provided with a slider, and the two chute A Each slider is fixedl...

specific Embodiment approach 2

[0016] Specific implementation mode two: as figure 1 As shown, this embodiment is a further description of specific embodiment one. The left and right adjustment mechanism includes a motor mounting seat one 3-1, a motor one 3-2, a turntable one 3-3, a connecting rod one 3-4 and Pull rod one 3-5; the motor one 3-2 is vertically arranged and fixedly connected to one side of the upper surface of the base plate 1 through the motor mount one 3-1, and the output shaft of the motor one 3-2 is connected to the horizontally arranged turntable one The middle part of 3-3 is fixedly connected, and the non-center of said turntable 3-3 is rotationally connected with one end of connecting rod 3-4 through pin 1, and the other end of said connecting rod 3-4 is connected with pull rod 3-3 One end of -5 is rotationally connected, and the other end of said pull rod one 3-5 is fixedly connected with the firing mechanism.

specific Embodiment approach 3

[0017] Specific implementation mode three: as figure 1 , 3 As shown, this embodiment is a further description of specific embodiment 1 or specific embodiment 2. The launch mechanism includes a box body 4-1, a telescopic column 1 4-2, a telescopic column 2 4-3, and a telescopic column 3. 4-4, launch box 4-5, launch plate 4-6, pull rod 3 4-7, connecting rod 3 4-8, turntable 3 4-9, motor 3 4-10, counter 4-11 and auxiliary spring 4- 12. The box body 4-1 is provided with an opening near one end of the receiving plate 2, one side of the box body 4-1 is fixedly connected with the other end of the pull rod 3-5, and the inner bottom surface of the box body 4-1 is connected to the telescopic column One 4-2, the lower end of the telescopic column two 4-3 and the telescopic column three 4-4 are fixedly connected, the upper end of the telescopic column one 4-2 is fixedly connected with the lower end of the vertically arranged launching box 4-5, and the The upper end of the launch box 4-5...

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Abstract

The invention relates to a mathematical probability demonstration device used for Pufeng needle throwing experiment, in particular to a mathematical teaching demonstration device. One side of the bottom plate is connected with a left and right regulating mechanism, the left and right regulating mechanism is connected with a transmitting mechanism, the lower end of the transmitting mechanism is connected with the other side of the bottom plate, the upper end of the transmitting mechanism is connected with the left and right regulating mechanism, the transmitting terminal of the transmitting mechanism cooperates with a receiving plate, and the receiving plate is connected with the bottom plate. The upper surface of the receiving plate is provided with multiple parallel lines with equal spacings, the two ends of each parallel line are provided with an infrared transmitter and an infrared receiver, the side face of the receiving plate is provided with a display screen and a single chip microcomputer, a storage battery supplies power to the single chip microcomputer, the storage battery is arranged in the receiving plate, the several infrared transmitters are electrically connected withthe output end of the single chip microcomputer, the several infrared receivers are electrically connected with the input end of the single chip microcomputer, and the output end of the single chip microcomputer is electrically connected with a display screen. The efficiency of an experiment is improved, the randomness of the experiment is ensured, the students' understanding of probability is depeened, and students can better learn probability knowledge.

Description

technical field [0001] The invention relates to a mathematics teaching demonstration device, in particular to a mathematical probability demonstration device used in Buffon's needle throwing experiment. Background technique [0002] Probability, also known as probability, chance rate, chance (probability) or possibility, is a basic concept of probability theory. Probability is a measure of the possibility of a random event occurring, and generally a real number between 0 and 1 represents the possibility of an event occurring. The closer the result is to 1, the more likely the event will occur; the closer the result is to 0, the less likely the event will occur, which is an objective argument rather than a subjective verification. Probability experiments generally include ball-touching games, coin tosses, turntables, Buffon's needle-throwing test, and bottle cap throwing, among which Buffon's needle-throwing test mainly refers to: [0003] 1) Take a piece of white paper and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B23/02
CPCG09B23/02
Inventor 黄永辉
Owner HARBIN UNIV
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