Hall effect and magnetic field measuring experiment device

Abstract

The invention provides a device capable of acquiring, transmitting, and processing the magnetic field measuring experiment data through the Hall effect in a real time manner. The device comprises a power supply, an electromagnet, a Hall element, a DC digital reometer, a DC digital voltmeter, a circuit board embedded with a singlechip, a Bluetooth sending module, a display, a computer used for acquiring and processing the experiment data in a real time manner and provided with a Bluetooth receiving module, and a data processing program, wherein, the DC digital voltmeter is connected with the singlechip; when the recording button on the circuit board embedded with the singlechip is pressed down as long the Hall voltage is obtained by a student, the Hall voltage data can be transmitted to and displayed by the display connected with the singlechip in a real time manner; and the sending button on the circuit board embedded with the singlechip is pressed down as long as all the required data are measured by the student, a data packet with the above data and the number and name of the student is sent to the computer through the Bluetooth sending module, and then is stored and subjected to follow-up processing by the computer.

Description

technical field [0001] The invention relates to a university physics experiment device, mainly relates to a system for collecting, transmitting and real-time processing experimental data of magnetic field measurement by Hall effect, and belongs to the field of university physics experiment instruments. Background technique [0002] The American physicist Hall discovered in an experiment in 1879 that when the current passes through the conductor perpendicular to the external magnetic field, a potential difference will appear between the two end faces of the conductor perpendicular to the direction of the magnetic field and the current. This phenomenon is called Hall. Hall effect, the corresponding potential difference is called Hall potential difference (also known as Hall voltage). Later, it was found that the Hall effect of semiconductors is much stronger than that of metals, so people use semiconductor materials to make Hall sensors (also called Hall elements), which are s...

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Problems solved by technology

[0006] 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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