Mathematical probability demonstration device

Abstract

The invention belongs to the technical field of probability demonstration, and particularly relates to a mathematical probability demonstration device which comprises a box body; a rectangular grooveis formed in the inner bottom wall of the box body; an elastic plate is hinged to the rectangular groove; one end of the elastic plate is hinged to the end, close to the middle of the bottom wall of the box body, of the rectangular groove, and the other end of the elastic plate is close to the edge of an inner cavity of the box body and rotates freely. A guide groove is formed in the top end of the elastic plate, the end, away from the elastic plate hinge point, of the guide groove is deeper than the end close to the elastic plate hinge point, and the width value of the end, away from the elastic plate hinge point, of the guide groove is smaller than that of the end close to the elastic plate hinge point; the two sides of the disc are marked with different colors, and the colors on the disc are recognized through a color recognizer, so that the disc throwing result is accurately and quickly counted, a manual counting mode is replaced, the counting process is quick and efficient, and errors possibly occurring in the counting process are reduced. Therefore, the accuracy of the probability is ensured.

Description

technical field [0001] The invention belongs to the technical field of probability demonstration, in particular to a mathematical probability demonstration device. Background technique [0002] Probability is also called probability, chance rate or probability. Probability is the basic concept of mathematical probability theory. It is a real number between 0 and 1, and it is a measure of the possibility of random events. The application of the concept of probability in life can represent the quantity of the possibility of random events, which is an attribute inherent in the event itself that does not change with people's subjective wishes. [0003] There are also some technical solutions about probability demonstrations in the prior art, such as a Chinese patent with application number CN201510151874.1, which discloses an advanced mathematical probability demonstration device, including a base, an ejection assembly, and a coin supply assembly During the demonstration proce...

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Problems solved by technology

[0003] There are also some technical solutions about probability demonstrations in the prior art, such as a Chinese patent with application number CN201510151874.1, which discloses an advanced mathematical probability demonstration device, including a base, an ejection assembly, and a coin supply assembly During the demonstration process, one coin after another was thrown, avoiding the time-consuming and labor-intensive problems caused by the statistician holding the coin for tossing, and liberating manpower; the coin tossing is mainly composed of cylinders, springs and electromagnets. Control, high degree of automation; the spring, first cylinder and electromagnet of each ejection assembly are the same. During the coin tossing process, it can ensure that the throwing environment is the same every time the coin is tossed, ensuring the accuracy of the test results and The persuasiveness of the test; the demonstration device is convenient and simple to operate, and can be popularized and applied on university campuses, but the patent needs to toss multiple coins, and each toss requires manual statistics, which makes the statistical process time-consuming and laborious, and each coin There is a difference between the front and back of the coin, and the weight of the front and back of the coin also has a certain weight difference, which makes the demonstration result have a certain error, thus affecting the accuracy of the probability

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