CN101533575A

CN101533575A - Fixed structure of weightlessness demonstration experiment device

Info

Publication number: CN101533575A
Application number: CN 200810034651
Authority: CN
Inventors: 吴可治; 徐江鹿
Original assignee: Shanghai Nanyang Model High School
Current assignee: Shanghai Nanyang Model High School
Priority date: 2008-03-14
Filing date: 2008-03-14
Publication date: 2009-09-16

Abstract

The invention relates to a demonstration device for science popularization activities, in particular to a fixed connection structure of a weightlessness demonstration experiment device, which comprises a fixing top board (1) and an experiment cabinet (2); a magnet (3) and a pure iron (5) are embedded on the fixing top board (1) and the experiment cabinet (2); an electrified coil (4) is wounded on the magnet and two ends of the electrified coil (4) are connected to a power supply through a control circuit; and the contact face of the magnet (3) with the pure iron appears as a plane. The fixed connection structure is simple; the fixing process can be completed easily; the falling process of the experiment cabinet (2) is steady; and the demonstration experiment can be carried out repeatedly. The steady falling process of the experiment cabinet can lead the observers to see the experimental phenomenon approaching to the authentic weightlessness condition.

Description

The fixed sturcture of weightlessness demonstration experiment device

Technical field

The present invention relates to a kind of Popular Science Education activity demonstrating experiment device, particularly a kind of fixed connection structure of weightless test apparatus for demonstrating.

Background technology

The experimental section of Ministry of Education's 2005 " regular senior secondary school's physics curricular standard " requires the student to understand the experiment of carrying out in space capsule or the artificial satellite under weightlessness and the microgravity condition, the Laboratory Module of existing weightless test teaching demonstration instrument designs according to the Flight Vehicle Design main points, constitute by nose cone, tube section, tail cone and four parts of empennage, placement comprises parts such as candle, portfire and video camera in the body of Laboratory Module cabin, and Laboratory Module is suspended on the top by two cotton yarn anchor line (string)s that have heating wire that tie up to cabin body afterbody.There is following deficiency in the mode of this fixedly Laboratory Module:

1. the method that starts weightless education demonstrator free-falling is to blow cotton thread with heating wire, owing to the difference of cotton thread quality and the reason of power supply, and the thermal inertia of heating wire, may cause two cotton threads to blow simultaneously, then Laboratory Module can not steadily fall, thereby influence is to the observation of experimental phenomena.

2. each experiment all needs the cotton thread that more renews, has brought unnecessary trouble for the experimental demonstration personnel, in addition owing to all need to change cotton thread at every turn, makes time lengthening between the double experiment.

3. in addition, Laboratory Module is being required fixedly the time mid point of cotton thread hang on the heating wire, if the length difference at two ends, the cabin body will be crooked, also will buttress Laboratory Module simultaneously and make it keep stationary state, and this process is lost time very much.

Therefore improve the fixed sturcture of Laboratory Module, guarantee that Laboratory Module can steadily fall, observe reliable experimental phenomena, and can be fast repeated experiments repeatedly, become a kind of expectation of weightless test demonstrator and observer.

Summary of the invention

Purpose of the present invention: be to provide a kind of being easy to fix, can steadily fall moment, can be fast the fixed sturcture of the weightless test apparatus for demonstrating of repeated experiments operation repeatedly, the observer can be observed near the various experimental phenomenas under the real state of weightlessness.

The fixed sturcture of this weightless test apparatus for demonstrating comprises fixedly top board 1 and Laboratory Module 2, it is characterized in that: fixedly be embedded with magnet 3 and pure iron 5 on top board 1 and the Laboratory Module 2.

Described magnet 3 is installed in fixedly on the top board 1, and described pure iron 5 is installed in the afterbody of Laboratory Module 2.

Described magnet 3 is installed in the afterbody of Laboratory Module 2, and described pure iron 5 is installed in fixedly on the top board 1.

Described magnet 3 is the iron core of electromagnet.

Described magnet 3 is permanent magnet.

Be wound with hot-wire coil 4 on the described magnet 3.

The two ends of the coil 4 of described magnet 3 connect power supply through control circuit.

Described control circuit is a computing machine.

Described control circuit is the PLC program controller.

Described magnet 3 is a plane with the surface of contact of pure iron 5.

Described plane is taken advantage of 1.2 centimetres more than or equal to 1.2.

Fixed sturcture according to this weightless test apparatus for demonstrating of above technical scheme design, to coil 4 energized of electromagnet 3 whether, electromagnet is produced or elimination magnetic, cause its iron core whether to hold Laboratory Module 2 aft mounted iron blocks 5, whether reach Laboratory Module 2 is draped or is released, when release experiment cabin 2, Laboratory Module 2 movement of falling objects can be observed, the candle combustion state in record and the test experiments cabin 2 or the physical phenomenon under other state of weightlessness.

The technical program can reach repeatedly repeatedly, convenient absorption and release movement.

The two ends of the coil 4 of magnet 3 connect power supply by the control circuit of computing machine or PLC program controller, can light with the candle of Laboratory Module 2 inside, activity such as camera photography cooperate and start or stop, and reach sequencing and operate and finish whole experiment.

The iron core of electromagnet 3 and iron block have one more than or equal to 1.2 take advantage of 1.2 centimetres contact the absorption plane, can guarantee to have mutually a bigger absorption plane, make Laboratory Module 2 can be absorbed and fixed on the top board 1 reposefully, guarantee to land evenly, correctly experimentize exactly, obtain experimental result.

Compare with the syndeton of present existing weightless test education demonstrator, the technical program has the following advantages:

Laboratory Module 2 fixation procedure are simple, as long as with the little iron block 5 of Laboratory Module afterbody aim at electromagnet 3 can with cabin body 2 stable be fixed on eminence, can repeatedly repeat the lecture experiment operation fast, because the cabin body can steadily fall moment, help to observe experimental phenomena near under the real below-G conditions.

Description of drawings

Fig. 1 is a synoptic diagram of the present invention.

Among the figure: 1, top board 2, Laboratory Module 3, magnet 4, coil 5, pure iron

Embodiment

The fixed sturcture of this weightless test apparatus for demonstrating of 1 design with reference to the accompanying drawings, comprise fixedly top board 1 and Laboratory Module 2, the permanent magnet 3 of one winding around 4 is set on fixing top board 1, at described real hatch checking 2 afterbodys one cylindrical pure iron 5 is set, the iron core of permanent magnet 3 contacts with pure iron 5 to realize fixedly fixedly connected between the top board 1 and Laboratory Module 2.The two ends of the hot-wire coil 4 on the permanent magnet 3 connect power supply through control circuit.Described control circuit is and the CRD driver that is connected to computing machine.Permanent magnet 3 and pure iron 5 surface of contact are one 1.2 to take advantage of 1.2 centimetres of planes.

To coil 4 energized of permanent magnet 3 whether, electromagnet is produced or elimination magnetic, cause its iron core whether to hold Laboratory Module 2 aft mounted iron blocks 5, whether reach Laboratory Module 2 is draped or is released, when release experiment cabin 2, Laboratory Module 2 movement of falling objects can be observed, the candle combustion state in record and the test experiments cabin 2 or the physical phenomenon under other state of weightlessness.

On computers with after the VB programming, connection by CRD driver control DC current is cut off, experimentize when demonstration, starting current push button on computers, this moment coil 4 turn-on current on the permanent magnet 3, produce and the opposite magnetic field of permanent magnet 3 magnetic, the magnetic field force of this magnetic field force and permanent magnet 3 offsets, and Laboratory Module 2 no longer is subjected to the effect of magnetic field force, does the movement of falling object under the effect of himself gravity, moment steadily falls, and experiment starts.During repeated experiments, only need the pure iron 5 of Laboratory Module 2 afterbodys is aimed at permanent magnet 3, Laboratory Module 2 is placed in eminence again, promptly can carry out experimental demonstration next time.

Claims

1, a kind of fixed sturcture of weightless test apparatus for demonstrating comprises fixedly top board (1) and Laboratory Module (2), it is characterized in that: fixedly be embedded with magnet (3) and pure iron (5) on top board (1) and the Laboratory Module (2).

2, the fixed sturcture of weightlessness demonstration experiment device according to claim 1 is characterized in that: described magnet (3) is installed in fixedly on the top board (1), and described pure iron (5) is installed in the afterbody of Laboratory Module (2).

3, the fixed sturcture of weightlessness demonstration experiment device according to claim 1 is characterized in that: described magnet (3) is installed in the afterbody of Laboratory Module (2), and described pure iron (5) is installed in fixedly on the top board (1).

4, the fixed sturcture of weightlessness demonstration experiment device according to claim 1 is characterized in that: described magnet (3) is the iron core of electromagnet.

5, the fixed sturcture of weightlessness demonstration experiment device according to claim 1 is characterized in that: described magnet (3) is permanent magnet.

6, the fixed sturcture of weightlessness demonstration experiment device according to claim 1 is characterized in that: be wound with hot-wire coil (4) on the described magnet (3).

7, the fixed sturcture of weightlessness demonstration experiment device according to claim 1 is characterized in that: the two ends of the coil (4) of described electromagnet (3) connect power supply through control circuit.

8, the fixed sturcture of weightlessness demonstration experiment device according to claim 2 is characterized in that: described control circuit is a computing machine.

9, the fixed sturcture of weightlessness demonstration experiment device according to claim 3 is characterized in that: described control circuit is the PLC program controller.

10, the fixed sturcture of weightlessness demonstration experiment device according to claim 1 is characterized in that: described magnet (3) is a plane with the surface of contact of pure iron (5).

11, the fixed sturcture of weightlessness demonstration experiment device according to claim 5 is characterized in that: described plane is taken advantage of 1.2 centimetres more than or equal to 1.2.