CN102354466A

CN102354466A - Air track experiment device

Info

Publication number: CN102354466A
Application number: CN2011103175536A
Authority: CN
Inventors: 李松涛; 任芝; 杨越; 王兰谟
Original assignee: North China Electric Power University
Current assignee: North China Electric Power University
Priority date: 2011-10-14
Filing date: 2011-10-14
Publication date: 2012-02-15

Abstract

The invention relates to a device for performing acquisition, transmission and real-time processing on air track experiment data, which comprises an air track experiment table, a circuit board, a photoelectric door, a bluetooth transmitter module, a display, a computer and a data processor, wherein the circuit board is embedded with a singlechip; the photoelectric door is connected with the singlechip and is used for triggering; and the computer is used for performing acquisition and real-time processing on the experiment data and is configured with a bluetooth receiver module. When an air track experiment is conducted, the device for performing the acquisition, the transmission and the real-time processing on the air track experiment data is characterized in that the singlechip on the circuit board is utilized to perform timing, the singlechip is connected with the photoelectric door; an anti-dazzling screen can be transferred to the singlechip by the photoelectric door through the time signals of the photoelectric door, and then, the signals are transmitted in real time by the singlechip and are displayed on the display connected onto the singlechip; students press a sending button on the circuit board embedded with the singlechip after measuring all required data; a data packet containing the data and student numbering as well as names is sent to the computer through the bluetooth transmitter module; and then, storage and postprocessing are performed on the data after the data packet is received by the computer.

Description

The Air Track Experiment device

Technical field

The present invention relates to a kind of physics facility, relate generally to a kind of collection, transmission and real time processing system of Air Track Experiment data, belong to the physical experiment apparatus field.

Background technology

Air track is a kind of modern Experiments of Machanics instrument, and it utilizes small-sized source of the gas that pressurized air is sent into the guide rail inner chamber, and air by spraying in the aperture on the guide rail surface, forms very thin air cushion layer again between guide rail surface and glider inside surface.Glider just floats on the air cushion layer; Disengage with rail level; Thereby can on rail level, do approximate unresisted rectilinear motion; Greatly reduced in Experiments of Machanics because the error that friction causes; Make experimental result near theoretical value, can measure, a plurality of mechanics laws are verified multiple mechanics physical quantity.

Air track can carry out kinds of experiments; Comprise: the cycle of measuring rate, acceleration magnitude, spring oscillator simple harmonic oscillation; Momentum conservation under checking elastic collision and the inelastic collision condition, the laws such as conservation of mechanical energy of spring oscillator; Its ultimate principle is all to be the measurement to the time, and Air Track Experiment is exactly the time of adopting digital millisecond counter and photogate record glider on air track, to move.

Yet all to be the student carry out write by hand to the reading of digital millisecond counter to the current experiments process, need constantly press the number of times button that is in the light accordingly on the digital millisecond counter when copying, and the laboratory report of being submitted to all is that the experimental data with write by hand is the basis.

There are three problems in such experimentation; First: the experiment grasp degree for the student is difficult for understanding; As everyone knows; 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; A kind of collection, transmission and real time processing system of Air Track Experiment data are provided; It can measure, mechanics law is verified multiple mechanics physical quantity, and conveniently reads experimental data, transmits experimental 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; A kind of collection, transmission and real time processing system of Air Track Experiment data are provided, have comprised: the Air Track Experiment platform, be embedded with the circuit board of single-chip microcomputer, link to each other with the single-chip microcomputer photogate, Bluetooth wireless transmission module, the LCD that are used to trigger, be used for computing machine and data processor that experimental data is collected and handled in real time.

When doing Air Track Experiment, with anti-dazzling screen, when anti-dazzling screen passes through photogate, can form trigger pip on the glider.Foregoing all is prior aries, no longer gives unnecessary details at this.The invention is characterized in: it is a circuit board that is embedded with single-chip microcomputer that digital millisecond counter is changed, and uses the single-chip microcomputer on this circuit board to carry out timing.Single-chip microcomputer is connected with photogate, and photogate can be passed to single-chip microcomputer through the time signal of photogate with anti-dazzling screen, and single-chip microcomputer transmits these signal in real time and be presented on the coupled LCD that connects then.After the student all measures desired data; By " transmission " button on the circuit board that is embedded with single-chip microcomputer; The packet that comprises above-mentioned data and student numbering and name sends to through the Bluetooth transmission module on teacher's the computing machine, receives the back by computing machine again data are carried out subsequent treatment.

Pass through said apparatus; Just solve aforesaid problem; Whenever after once testing; The student can both be real-time the experimental data of on display, seeing this time; Also be that anti-dazzling screen passes through the required time of photogate, 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 is the anti-dazzling screen synoptic diagram;

Fig. 2 is collection, transmission and the receiver module synoptic diagram of Air Track Experiment device data;

In above-mentioned figure, the four edges of 1～4 expression anti-dazzling screen, 5 expression photogate, 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 anti-dazzling screen part among the present invention, and this anti-dazzling screen is consistent with air track device of the prior art.

Subsidiary have the glider of anti-dazzling screen on air track, to slide, and represents one to do straight-line object.When the glider process was located at certain locational photogate, anti-dazzling screen carried out shading to photogate.Block the light time when first limit 1, timer picks up counting, and continues timing when second limit 2 passed through, and when be in the light in the 3rd limit 3, stops timing again.Measured shading film first and third side edges 3 a width between Δx and blackout time Δt, the slider can be calculated through the optical gate average rate

As Δx is relatively small, and in the range of the slider velocity Δx change is small, it can be seen as the average speed of the sliding door through the optical device the instantaneous rate.

The invention is characterized in its collection that also comprises data, transmission and receiver module; This module comprises the single-chip microcomputer that is connected with photogate; This single-chip microcomputer is used to receive the anti-dazzling screen that sends from photogate and passes through the time data of photogate; And this data in real time transmitted and is presented at display that single-chip microcomputer links to each other on; And; Be embedded with on the circuit board of single-chip microcomputer and also be provided with " transmission " button and Bluetooth transmission module; By pressing said button; Said Bluetooth transmission module can be sent to the packet that includes student information and above-mentioned data the bluetooth receiver module on teacher's computer, receives back storage and processing on this computer.

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.

Claims

1. the collection of Air Track Experiment data; Transmit and real-time treating apparatus; Comprise: the Air Track Experiment platform; Be embedded with the circuit board of single-chip microcomputer; The photogate that links to each other and be used to trigger with single-chip microcomputer; The Bluetooth transmission module; Display; The computing machine and the data processor that are used for experimental data collection and the configuration bluetooth receiver module of handling in real time; When doing Air Track Experiment; It is characterized in that: use the single-chip microcomputer on this circuit board to carry out timing; Single-chip microcomputer is connected with photogate; Photogate can be passed to single-chip microcomputer through the time signal of photogate with anti-dazzling screen; Single-chip microcomputer transmits these signal in real time and be presented on the display that is connected on the single-chip microcomputer then; After the student all measures desired data; By " transmission " button on the circuit board that is embedded with single-chip microcomputer; The packet that comprises above-mentioned data and student numbering and name sends on the said computing machine through the Bluetooth transmission module, receives the back by computing machine again data are stored and subsequent treatment.

2. device according to claim 1, said display are LCD.

3. device according to claim 1, said " deletion " key that also is provided with on the circuit board of single-chip microcomputer that is embedded with is used for the experimental data in experimentation deletion action mistake.