Millikan oil-drop experimental apparatus

Abstract

The invention provides a collecting, transmitting and real-time processing apparatus for Millikan oil-drop experiment data. The collecting, transmitting and real-time processing apparatus for the Millikan oil-drop experiment data is characterized in that the a single chip microcomputer on a circuit board is used for timing; a balance voltage is dialed to be 0 V; and when beginning to drop by one grid, the oil-drop becomes in a uniform linear motion under the combined action of gravity and air viscous resistance. When the oil-drop reaches the first grid, a student presses down a timing button on a panel of an oil-drop instrument, and then the single chip microcomputer begins timing; at the instant that the oil-drop moves to the sixth grid, the student presses down the timing button again, and then the single chip microcomputer ends timing, transmits the time data in real time, and displays the data on a displayer connected with the single chip microcomputer; and after the students measures all required data, a sending button inserted on the circuit board of the single chip microcomputer is pressed down, and then a data package including the data and student numbers and names are transmitted to a computer through a Bluetooth emission module, and then the data is stored and further processed by the computer.

Description

technical field [0001] The invention relates to a university physics experiment device, mainly relates to a Millikan oil drop experiment data collection, transmission and real-time processing system, and belongs to the field of university physics experiment instruments. Background technique [0002] Millikan's oil drop experiment is a work done by American physicist Millikan from 1909 to 1917 to measure the charge on tiny oil droplets. In this experiment, Millikan accurately measured the charge value of electrons and directly verified the discontinuity of charge. His conclusion is of great significance in the history of physics development. Mr. Millikan was awarded the Nobel Prize in Physics in 1923. [0003] Since the electric quantity of electrons (that is, the electric quantity of the elementary charge) belongs to the observation of a tiny physical quantity, this experiment is quite difficult. It is a test for the experimenter's scientific attitude, strict operating pro...

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Problems solved by technology

[0036] There are three problems in this kind of experimental process. First, it is not easy to understand the students' experimental mastery. As we all know, plagiarism among students is common. If students plagiarize other people's experimental data after the experiment, and use it to Submitting the experiment report, the experiment teacher can't find out in time, because the student's data recording process is completely independent of the teacher. The result of this is that the teacher cannot have a good understanding of the student's experimental mastery, which leads to the lack of confidence in teaching. There are deviations in quality assessment; second, students spend time and effort in the process of data recording, and the data are separated from each other, which is prone to errors; third, experimental teachers rely more on experience in processing student data, which inevitably occurs during the scoring process. deviation

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