CN102509501A - Hall effect and magnetic field measuring experiment device - Google Patents
Hall effect and magnetic field measuring experiment device Download PDFInfo
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- CN102509501A CN102509501A CN201110369795XA CN201110369795A CN102509501A CN 102509501 A CN102509501 A CN 102509501A CN 201110369795X A CN201110369795X A CN 201110369795XA CN 201110369795 A CN201110369795 A CN 201110369795A CN 102509501 A CN102509501 A CN 102509501A
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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
The present invention relates to a kind of Experiment of College Physics device, relate generally to a kind of collection of experiment data, transmission and real time processing system, belong to the Experiment of College Physics instrument field with Hall effect measurement magnetic field.
Background technology
U.S. physicist Hall was found in experiment in 1879; When current vertical in external magnetic field when the conductor; Electric potential difference can appear between two end faces perpendicular to magnetic field and direction of current of conductor; This phenomenon is known as Hall effect, and corresponding electric potential difference is called Hall voltage poor (being called Hall voltage again).It is found that afterwards that semi-conductive Hall effect was more much better than than metal; Therefore people use semiconductor material to process Hall element (being called Hall element again); It has to magnetic-field-sensitive, simple in structure, volume is little, frequency response is wide, output voltage changes greatly and advantage such as long service life; Therefore, be widely used in fields such as measurement, robotization, computing machine and infotecies.
In college physical experiment teaching, can use Hall element that semiconductor type, carrier concentration etc. is measured, become one of College Physics basic experiment and utilize Hall effect to measure non-uniform magnetic-field.In present Hall effect and magnetic field measuring experiment, the student reads Hall voltage V through moving the position of Hall element in magnetic field
H, be recorded on the EDR paper through write by hand; After class, through magnetic induction B and Hall voltage V
HRelational expression calculate magnetic induction:
In the formula, R
HThe expression Hall coefficient, I
sExpression is through the electric current of Hall element, and d representes the thickness of Hall element.
There are three problems in such experimentation; First: the experiment grasp degree for the student is difficult for understanding, and well-known, the plagiarism phenomenon between the student is ubiquitous; If the student has plagiarized other people experimental data after experiment; And submit laboratory report to this, experiment teacher can not in time find this, because student's data recording process is independent of teacher fully; To be exactly teacher grasp degree for student's experiment to the consequence that causes like this can not have one and well understand, and then cause deviation occurring for the assessment of quality of instruction; The second, time-consuming in data recording process, the effort of student, data are discrete to each other, are easy to generate mistake; The 3rd, to the processing of student data how by rule of thumb the experiment teacher deviation inevitably occurs in scoring process.
The present invention proposes to above-mentioned problem; Provide a kind of Hall effect to measure magnetic field collection of experiment data, transmission and real time processing system; It can measure Hall voltage, and convenience reads experimental data accurately, transmits data, handles experimental data in real time.In teaching, can change experiment content at any time according to the experiment needs, simple, easy row.
Summary of the invention
According to one embodiment of the invention; Provide a kind of Hall effect to measure magnetic field collection of experiment data, transmission and real time processing system, having comprised: power supply, electromagnet, Hall element, direct-flow digital ammeter, dc digital voltmeter, the circuit board that is embedded with single-chip microcomputer, Bluetooth wireless transmission module, LCD, the computing machine and the data processor that are used for the experimental data collection and handle in real time.
Hall effect is measured the magnetic field experiment, and power supply is responsible for to electromagnet, Hall element power supply, the electric current that direct-flow digital ammeter monitoring Hall element passes through, and dc digital voltmeter monitoring Hall voltage, these all are prior aries, and are very ripe, no longer give unnecessary details at this.The invention is characterized in: this Hall effect is measured in the experimental provision of magnetic field; The same single-chip microcomputer of dc digital voltmeter is connected; When the student measures Hall voltage; Press " record " button on the circuit board that is embedded with single-chip microcomputer, single-chip microcomputer can send the Hall voltage data in real time and be presented on the coupled LCD that connects.After the student all measured desired data, by " transmission " button, the packet that comprises above-mentioned data and student numbering and name sent to through the Bluetooth transmission module on teacher's the computing machine, by computing machine data is carried out subsequent treatment again.
Through said apparatus, just solve aforesaid problem, after whenever once testing; The student can both be real-time the experimental data of on display, seeing this time; Also be the data of Hall voltage, if dissatisfied for experimental result, could be directly with data deletion; Again experimentize, what it was seen at last is whole experimental data of an integral body; Moreover after the each experiment of student finished, the experimental data that all needs to include personal information sent on teacher's the computing machine, can guarantee that teacher sees the experimental data that each student is original, has effectively prevented to plagiarize between the student generation of phenomenon; The 3rd, adopt this system, computer program with Data Processing in Experiment and storage after, can call at any time, as the objective basis of teacher when the given laboratory report mark, thereby carry out conveniently, just experimental evaluation.
Description of drawings
Fig. 1 measures magnetic field experimental provision structural representation for Hall effect;
Fig. 2 measures collection, transmission and the receiver module synoptic diagram of magnetic field experimental provision data for Hall effect;
In above-mentioned figure, 1 expression two dimension moves scale, 2 expression electromagnet; 3 expressions are placed with the support of Hall element, 4 expression Hall elements, the control box of 5 expression integrated power supplies, direct-flow digital ammeter, dc digital voltmeter; 6 expression single-chip microcomputers; 7 expression displays, 8 expression Bluetooth transmission modules, 9 expressions are furnished with the computing machine of bluetooth receiver module.
Specific embodiment
Fig. 1 shows the structural representation of Hall effect mensuration magnetic field experiment among the present invention, and this part is consistent with Hall effect mensuration of the prior art magnetic field experimental provision.
The invention is characterized in its collection that also comprises data, transmission and receiver module.Middle school student of the present invention move scale through regulating two dimension, make Hall element 4 arrive different position in the magnetic field that electromagnet 2 produce, and observe the reading of dc digital voltmeter, are Hall voltage; Dc digital voltmeter 5 is connected with single-chip microcomputer 6 simultaneously; The student presses " record " button on the circuit board that is embedded with single-chip microcomputer; Single-chip microcomputer can be with on this Hall voltage data transmission to coupled display that connects; And, be embedded with on the circuit board of single-chip microcomputer and also be provided with " transmission " button and Bluetooth transmission module, said through pressing " transmission " button; Said Bluetooth transmission module can be sent to the bluetooth receiver module on teacher's computing machine with the packet that includes student information and above-mentioned data, receives back storage and processing on this computing machine.
Display: the data that the singlechip chip collection is come are all shown experiment content and data by 8 o'clock TFT LCD.The experimental data that the student observes through liquid crystal display has associative perception, can be through the data of contrast different measuring group, the operating mistake that possibly exist in the judgment experiment.For misdata, can directly delete by " deletion " key on the circuit board that is embedded with single-chip microcomputer.The user can also select LCD different, suitable dimension according to what difference of data in the experiment.
Data transmit: experimental data is stored in the single-chip microcomputer temporarily, and the circuit board that is embedded with single-chip microcomputer is provided with " transmission " button, clicks this button, and then data send through the blue teeth wireless signal through bluetooth module.
Data Receiving: be inserted with Bluetooth adapter on the computing machine as the bluetooth receiver module, can receive Bluetooth signal.
Data in real time is handled: the program that writes is arranged on the computing machine, read the data that Bluetooth adapter receives, the storage experimental data is to being in the file of filename, as data backup with student's student number and name.Simultaneously; Computer program also can be handled experimental data, is presented on the computer screen experiment quality of doing with teacher's real-time judge student of convenient teaching during fructufy after the processing; And objective basis is provided for correcting laboratory report, make things convenient for the teacher to screen the accuracy of student data.
If want to change the part experiment content, only need in single-chip microcomputer write-in program again, adjustment liquid crystal display displaying contents is rewritten computer processing, can practice thrift big measuring appratus and upgrade and improvement expenses.
Claims (3)
1. Hall effect and magnetic field measuring collection of experiment data, transmission and treating apparatus in real time comprise: power supply, electromagnet, Hall element, direct-flow digital ammeter, dc digital voltmeter, the circuit board that is embedded with single-chip microcomputer, bluetooth sending module, display, be used for computing machine that disposes the bluetooth receiver module and data processor that experimental data is collected and handled in real time; Dc digital voltmeter is connected with single-chip microcomputer; When the student measures Hall voltage; Press " record " button on the circuit board that is embedded with single-chip microcomputer; Single-chip microcomputer can after the student all measures desired data, be pressed " transmission " button on the circuit board that is embedded with single-chip microcomputer with on the display that the Hall voltage data in real time sends to and is presented at single-chip microcomputer is connected; The packet that comprises above-mentioned data and student numbering and name sends on the said computing machine through the Bluetooth transmission module, by said computing machine data is stored and subsequent treatment again.
2. device according to claim 1, said display are LCD.
3. device according to claim 1, " deletion " key that also is provided with on the circuit board of said single-chip microcomputer is used for the experimental data in experimentation deletion action mistake.
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| CN201110369795XA CN102509501A (en) | 2011-11-18 | 2011-11-18 | Hall effect and magnetic field measuring experiment device |
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| CN201110369795XA CN102509501A (en) | 2011-11-18 | 2011-11-18 | Hall effect and magnetic field measuring experiment device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105243940A (en) * | 2015-11-22 | 2016-01-13 | 湖南城市学院 | Electromagnetic effect experiment instrument |
| CN105759227A (en) * | 2016-04-08 | 2016-07-13 | 上海智勇教育培训有限公司 | Magnetic induction intensity measuring method and device |
| CN107703341A (en) * | 2017-09-08 | 2018-02-16 | 佛山市南海毅顺电器设备有限公司 | A kind of device for being used to measure busbar D.C. high-current |
| CN114446130A (en) * | 2021-12-29 | 2022-05-06 | 中国地质大学（北京） | Induced magnetic field exploration experimental device and method based on Maxwell theory |
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| CN201555895U (en) * | 2009-11-12 | 2010-08-18 | 安徽鑫龙电器股份有限公司 | Single-phase digital current/voltage measuring instrument |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105243940A (en) * | 2015-11-22 | 2016-01-13 | 湖南城市学院 | Electromagnetic effect experiment instrument |
| CN105759227A (en) * | 2016-04-08 | 2016-07-13 | 上海智勇教育培训有限公司 | Magnetic induction intensity measuring method and device |
| CN105759227B (en) * | 2016-04-08 | 2024-04-09 | 上海智勇教育培训有限公司 | Method and device for measuring magnetic induction intensity |
| CN107703341A (en) * | 2017-09-08 | 2018-02-16 | 佛山市南海毅顺电器设备有限公司 | A kind of device for being used to measure busbar D.C. high-current |
| CN114446130A (en) * | 2021-12-29 | 2022-05-06 | 中国地质大学（北京） | Induced magnetic field exploration experimental device and method based on Maxwell theory |
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Application publication date: 20120620 |