CN106652680A - Portable freefall experiment instrument - Google Patents
Portable freefall experiment instrument Download PDFInfo
- Publication number
- CN106652680A CN106652680A CN201710134043.2A CN201710134043A CN106652680A CN 106652680 A CN106652680 A CN 106652680A CN 201710134043 A CN201710134043 A CN 201710134043A CN 106652680 A CN106652680 A CN 106652680A
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- CN
- China
- Prior art keywords
- photogate
- glass tubing
- sealing
- plug
- falling object
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002474 experimental method Methods 0.000 title claims abstract description 35
- 239000011521 glass Substances 0.000 claims abstract description 52
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 7
- 239000010959 steel Substances 0.000 claims abstract description 7
- 229920001821 foam rubber Polymers 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 3
- 241000628997 Flos Species 0.000 claims 1
- 208000031481 Pathologic Constriction Diseases 0.000 claims 1
- 230000005622 photoelectricity Effects 0.000 claims 1
- 210000001215 vagina Anatomy 0.000 claims 1
- 230000001681 protective effect Effects 0.000 abstract description 7
- 238000005259 measurement Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 7
- 230000001133 acceleration Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000005484 gravity Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000003437 trachea Anatomy 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/08—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics
- G09B23/10—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics of solid bodies
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V7/00—Measuring gravitational fields or waves; Gravimetric prospecting or detecting
- G01V7/14—Measuring gravitational fields or waves; Gravimetric prospecting or detecting using free-fall time
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- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Geophysics (AREA)
- Pure & Applied Mathematics (AREA)
- Algebra (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Mathematical Physics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Business, Economics & Management (AREA)
- Life Sciences & Earth Sciences (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- Theoretical Computer Science (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention relates to a freefall experiment instrument, in particular to the technical field of middle school physics experiment instruments. A base is made of a regular triangle-shaped steel plate, and the perpendicularity of a glass tube is adjusted through three adjusting screws which are in threaded connection on the base; a protective casing pipe is fixed to the base, and a sponge mat is placed in the protective casing pipe; the lower end of the glass tube is connected with the protective casing pipe through an external thread, and a length scale plate is arranged on the outer surface of the glass tube; a sealing plug is arranged at the upper end of the glass tube, and a groove for containing a small steel ball is formed in the lower portion of the sealing plug; a breather pipe is fixed to the sealing plug; a sealing valve is arranged at the upper end of the breather pipe; the sealing plug is connected with a pull rod through threads; an annular permanent magnet is arranged on the upper portion of the sealing plug; an upper photogate, a middle photogate and a lower photogate are arranged outside the glass tube. The portable freefall experiment instrument is convenient to carry and easy to operate, and high-precision measurement and experiment of freefall of the small steel ball with a certain vacuum degree can be achieved under normal air pressure. Furthermore, by the adoption of equipment such as an external connection air pump, experiment of freefall of the small steel ball under various air pressures can be achieved.
Description
Technical field
The present invention relates to a kind of physics facility, more particularly to the experiment test device of the movement of falling object.
Background technology
Measurement acceleration of gravity (g, accepted value 9.81m/s2) it is a basic experiment project in Middle School Physics, it is present
Instrument used in physics experiment teaching be mostly with dotted timer be whereabouts weight paper tape on the side that recorded
Method, and experimental apparatus it is not readily portable enter classroom, need student to be tested into special laboratory.Despite many kinds
Method can measure acceleration of gravity, and Constructional Elements Using Falling Methods measuring gravity acceleration is most direct in all methods and simple method.
The key technology of the freely falling body method measurement acceleration of gravity being applied in physics teaching in secondary school is easy for carrying, simple to operate,
Test is accurate.
The content of the invention
For the problems referred to above, the technical problem to be solved in the present invention be open one kind be easy to carry, it is easy to operate, and can be real
Existing pinpoint accuracy quickly measures the experiment instrument of the movement of falling object.
The present invention is achieved by the following technical solutions：
A kind of portable movement of falling object experiment instrument, it includes base, adjusting screw, foam-rubber cushion, protection sleeve pipe, glass
Pipe, small ball, sealing-plug, breather, sealed valve, pull bar, permanent magnet, upper photogate, middle photogate, lower photogate, bottom
Seat screwed hole；Described base is connected by base threaded hole with three adjusting screws；Protective case is fixed with described base
Pipe, described protection sleeve pipe inner bottom part groove is placed with foam-rubber cushion；Described protection sleeve pipe female thread connection glass tubing；Described
Glass tube exterior surface has length scale scale, and there is sealing-plug described glass tubing upper end；Described sealing-plug is fixed with breather；
There is sealed valve described breather upper end；Described sealing-plug threaded connection pull bar；Described sealing-plug top is placed with
Permanent magnet；There are upper photogate, middle photogate, lower photogate outside described glass tubing.
Preferably, the base is equilateral triangle steel plate, and the protection sleeve pipe is fixed as one with base, and protective case
Pipe has female thread.
Preferably, the glass tube exterior surface has length scale scale, and glass tubing bottom has external screw thread to connect with protection sleeve pipe
It is connected together.
Preferably, the permanent magnet is annular shape.
Preferably, it is semi-circular recesses in the middle of the sealing-plug bottom, depth of groove is the three of experiment small ball diameter
1/1 mono- to two.
Preferably, the sealing-plug can pass through to be moved up and down in the range of whole length of the push-and-pull pull bar in glass tubing,
Pull bar length is slightly larger than glass length of tube, and pull bar is threaded connection with sealing-plug.
Optionally, the sealed valve of the breather upper end is opened, and the on-site normal barometric pressure of experiment is kept in glass tubing；
Close sealed valve, and pull pull bar to move to upper end from glass bottom of the tube by sealing-plug, can in glass tubing quickly and easily
Take out to be close to vacuum.
Optionally, the breather can be connected with the equipment such as outside air pump, can extract in glass tubing condition of high vacuum degree or
Inflate as hyperbar.
Optionally, photogate of the present invention optional upper, middle and lower three photogate, or only select two photogate.
Beneficial effects of the present invention are：The apparatus structure is simple, is easy to carry, easy to operate, is easy and fast in glass tubing
Higher vacuum is realized, the device is capable of achieving high-precision with the Free Falling Object And Acceleration of Gravity under higher vacuum under normal barometric pressure
Degree measurement experiment, the movement of falling object high-acruracy survey being capable of achieving by equipment such as the outside air pumps of connection under various air pressure.
Description of the drawings
Fig. 1 is a kind of portable movement of falling object experiment instrument structural representation of the present invention.
Fig. 2 is the freely falling body schematic diagram for taking away small ball after permanent magnet of the present invention.
Fig. 3 is that the movement of falling object experiment of the present invention finishes rear experiment instrument and packs up schematic diagram.
Fig. 4 is the base of the present invention and protection sleeve pipe and base threaded hole schematic diagram.
Fig. 5 is circular permanent magnet schematic diagram.
In figure：1 base, 2 adjusting screws, 3 foam-rubber cushions, 4 protection sleeve pipes, 5 glass tubings, 6 small balls, 7 sealing-plugs, 8 ventilations
Pipe, 9 sealed valves, 10 pull bars, 11 permanent magnets, photogate on 12, photogate, 14 times photogate, 15 base threaded holes in 13.
Specific embodiment
To make the object, technical solutions and advantages of the present invention of greater clarity, below in conjunction with specific embodiment and join
According to accompanying drawing, the present invention is described in further detail；Obviously, these descriptions are simply exemplary, and have to limit the model of the present invention
Enclose；Additionally, in the following description, the description to known features and technology is eliminated, to avoid unnecessary obscuring the present invention's
Concept.
Fig. 1 is a kind of portable movement of falling object experiment instrument structural representation of the present invention.The measurement dress of the application
Put including base 1, adjusting screw 2, foam-rubber cushion 3, protection sleeve pipe 4, glass tubing 5, small ball 6, sealing-plug 7, breather 8, sealing
Valve 9, pull bar 10, permanent magnet 11, upper photogate 12, middle photogate 13, lower photogate 14, base threaded hole 15；Described
Base 1 is connected by base threaded hole 15 with three adjusting screws 2；Protection sleeve pipe 4 is fixed with described base 1, it is described
Foam-rubber cushion 3 is placed with protection sleeve pipe 4；The described female thread of protection sleeve pipe 4 connection glass tubing 5；The described outer surface of glass tubing 5
There is length scale scale, there is sealing-plug 7 the described upper end of glass tubing 5；Described sealing-plug 7 is fixed with breather 8；Described is logical
There is sealed valve 9 upper end of trachea 8；Described sealing-plug threaded connection pull bar 10；Place permanent magnetic in the described top of sealing-plug 7
Ferrum 11；Photogate 12, middle photogate 13, lower photogate 14 are installed outside described glass tubing 5.
Further, the base 1 is equilateral triangle steel plate and has three screwed holes, and the protection sleeve pipe 4 is consolidated with base 1
It is set to one, and protects sleeve pipe 4 to have female thread.
Further, the outer surface of the glass tubing 5 has length scale scale, and external screw thread and protective case are arranged at the bottom of glass tubing 5
Pipe 4 links together.
Further, the permanent magnet 11 is annular shape.
Further, in the middle of the bottom of the sealing-plug 7 it is semi-circular recesses, depth of groove is the diameter of experiment small ball 6
1/1 to two/3rds.
Further, the sealing-plug 7 can be by upper and lower in the range of whole length of the push-and-pull pull bar 10 in glass tubing 5
Mobile, the length of pull bar 10 is slightly larger than the length of glass tubing 5, and pull bar 10 is threaded connection with sealing-plug 7.
Further, the sealed valve 9 of the upper end of the breather 8 is opened, and keeps experiment on-site normal in glass tubing 5
Air pressure, the movement of falling object experiment being capable of achieving under normal barometric pressure；Close sealed valve 9, and pull pull bar 10 allow sealing-plug 7 from
The bottom of glass tubing 5 moves to upper end, can be capable of achieving close vacuum quickly and easily taking out to be close to vacuum in glass tubing 5
The movement of falling object is tested.
Further, the breather 8 can be connected with the equipment such as outside air pump, can extract fine vacuum in glass tubing 5
Degree or inflation are hyperbar, realize the movement of falling object high-acruracy survey under various air pressure.
Further, the optional upper photogate 12 of photogate of the present invention, middle photogate 13,14 3 photogate of lower photogate,
Or only select two photogate.
Fig. 2 is the fundamental diagram of this specific embodiment.Protection sleeve pipe 4 is fixed with base 1；In protection sleeve pipe 4
The cushion pad that foam-rubber cushion 3 drops as small ball 6 is placed with bottom groove；Small ball 6 is placed on foam-rubber cushion 3；Protective case
Pipe 4 is threaded connection outer surface the glass tubing 5 of length scale scale；Permanent magnet 11 is positioned over above sealing-plug 7,
Pull pull bar 10 that sealing-plug 7 is moved to the upper end of glass tubing 5 from bottom to top, because the magnetic of permanent magnet 11 can be small ball
6 are suspended in the lower end groove of sealing-plug 7 upper end lifted together to glass tubing 5；Optionally, in the process for pulling sealing-plug 7
Whether the middle sealed valve 9 according to breather 8 is opened can will keep the on-site normal barometric pressure of experiment or be close to true in glass tubing 5
It is empty；It is vertical that experimental provision recover the adjusting screw 2 on upright rear adjusting base to cause glass tubing 5；Quickly take permanent magnet away
11, small ball 6 freely drops because of loss of excitation；Design accurate small ball 6 it is static when its be located upper photogate 12 to middle photogate
13 distance, and middle photogate 13 is to the distance of lower photogate 14, records small ball 6 through the time of three photogate, leads to
The distance crossed between speed, the photogate to small ball 6 at the photogate of diverse location and by used by different photogate
Time can present the principle of freely falling body.
The present invention is easy to carry, simple to operate, and general student slightly instructs and can complete at short notice under various air pressure
The experimental duties of the movement of falling object.
It should be appreciated that the above-mentioned specific embodiment of the present invention is used only for exemplary illustration or explains the present invention's
Ultimate principle, principal character and advantages of the present invention, and be not construed as limiting the invention.Therefore, without departing from the present invention's
Any modification, equivalent substitution and improvements done in the case of spirit and scope etc., should be included in protection scope of the present invention it
It is interior.Additionally, claims of the present invention are intended to fall into scope and border or this scope and side
Whole in the equivalents on boundary changes and modifications example.
Claims (9)
1. a kind of portable movement of falling object experiment instrument, it is characterised in that：It includes base (1), adjusting screw (2), sea
Silk floss pad (3), protection sleeve pipe (4), glass tubing (5), small ball (6), sealing-plug (7), breather (8), sealed valve (9), pull bar
(10), permanent magnet (11), upper photogate (12), middle photogate (13), lower photogate (14), base threaded hole (15)；Base
(1) protection sleeve pipe (4) is fixed with, in the bottom groove for protecting sleeve pipe (4) foam-rubber cushion (3) is placed with；Glass tubing (5) is by spiral shell
Stricture of vagina is connected with protection sleeve pipe (4), and glass tube exterior surface has length scale scale；Adjusting screw (2) is by base threaded hole (15)
It is connected with base (1), adjusting screw (2) adjusts the perpendicularity of glass tubing (5)；There is sealing-plug (7) glass tubing (5) upper end；Sealing
Plug (7) is fixed with breather (8)；There is sealed valve (9) breather upper end；Sealing-plug (7) threaded connection pull bar (10)；Sealing
Place permanent magnet (11) in plug (7) top；Photogate (12), middle photogate (13) and lower light are installed outside glass tubing (5)
Electric switch (14).
2. a kind of portable movement of falling object experiment instrument according to claim 1, it is characterised in that：The base
(1) it is equilateral triangle steel plate, the protection sleeve pipe (4) is fixed as one with base (1), and protects sleeve pipe to have female thread.
3. a kind of portable movement of falling object experiment instrument according to claim 1, it is characterised in that：The glass tubing
(5) outer surface has length scale scale, and glass tubing (5) bottom has external screw thread to link together with protection sleeve pipe (4).
4. a kind of portable movement of falling object experiment instrument according to claim 1, it is characterised in that：The permanent magnetic
Ferrum (11) is annular shape.
5. a kind of portable movement of falling object experiment instrument according to claim 1, it is characterised in that：The sealing-plug
(7) it is semi-circular recesses in the middle of bottom, depth of groove is 1st/to two/3rds of experiment small ball diameter.
6. a kind of portable movement of falling object experiment instrument according to claim 1, it is characterised in that：The sealing-plug
(7) can be by moving up and down in the range of whole length of the push-and-pull pull bar (10) in glass tubing (5), pull bar (10) length is bigger
In the length of glass tubing (5), pull bar (10) is threaded connection with sealing-plug (7).
7. a kind of portable movement of falling object experiment instrument according to claim 1, it is characterised in that：The breather
(8) sealed valve (9) of upper end is opened, and the on-site normal barometric pressure of experiment is kept in glass tubing, under being capable of achieving normal barometric pressure
The movement of falling object is tested；Sealed valve (9) is closed, pulls pull bar (10) to allow sealing-plug (7) to move to from glass tubing (5) bottom
Upper end, quickly and easily taking out to be close to vacuum in glass tubing, can realize the movement of falling object experiment of close vacuum.
8. a kind of portable movement of falling object experiment instrument according to claim 1, it is characterised in that：The breather
(8) can be connected with the equipment such as outside air pump, it is hyperbar that can extract as condition of high vacuum degree or inflation in glass tubing (5), is realized
Movement of falling object high-acruracy survey under various air pressure.
9. a kind of portable movement of falling object experiment instrument according to claim 1, it is characterised in that：Photoelectricity of the present invention
The optional upper photogate (12) of door, middle photogate (13), (14) three photogate of lower photogate, or only select two photogate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710134043.2A CN106652680A (en) | 2017-03-09 | 2017-03-09 | Portable freefall experiment instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710134043.2A CN106652680A (en) | 2017-03-09 | 2017-03-09 | Portable freefall experiment instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106652680A true CN106652680A (en) | 2017-05-10 |
Family
ID=58848178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710134043.2A Pending CN106652680A (en) | 2017-03-09 | 2017-03-09 | Portable freefall experiment instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106652680A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108269467A (en) * | 2018-03-14 | 2018-07-10 | 方浩然 | A kind of experiment with falling objects apparatus for demonstrating |
| CN109345921A (en) * | 2018-10-18 | 2019-02-15 | 华北理工大学 | A kind of simplified teaching mode of mechanics |
| CN109461352A (en) * | 2018-12-21 | 2019-03-12 | 刘家铮 | A kind of high school physics experiment with falling objects simulator |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200976231Y (en) * | 2006-11-27 | 2007-11-14 | 周刚云 | Measuring instrument for free falling body |
| CN202523276U (en) * | 2012-04-29 | 2012-11-07 | 刘长坤 | Gravity acceleration tester |
| CN203455978U (en) * | 2013-09-04 | 2014-02-26 | 余姚市科仪光仪有限公司 | Freely falling body tester |
| CN204516173U (en) * | 2015-03-23 | 2015-07-29 | 陈文卓 | Acceleration of gravity experiment teaching aid |
| CN104966438A (en) * | 2015-07-31 | 2015-10-07 | 湖南城市学院 | Experimental instrument measuring gravitational acceleration through falling body method |
| CN105261263A (en) * | 2015-11-22 | 2016-01-20 | 湖南城市学院 | Freefall motion experimental instrument |
| CN106373464A (en) * | 2016-10-31 | 2017-02-01 | 滕德虎 | Free fall gravity acceleration measuring device |
| CN206619320U (en) * | 2017-03-10 | 2017-11-07 | 韩晨希 | A kind of portable movement of falling object experiment instrument |
-
2017
- 2017-03-09 CN CN201710134043.2A patent/CN106652680A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200976231Y (en) * | 2006-11-27 | 2007-11-14 | 周刚云 | Measuring instrument for free falling body |
| CN202523276U (en) * | 2012-04-29 | 2012-11-07 | 刘长坤 | Gravity acceleration tester |
| CN203455978U (en) * | 2013-09-04 | 2014-02-26 | 余姚市科仪光仪有限公司 | Freely falling body tester |
| CN204516173U (en) * | 2015-03-23 | 2015-07-29 | 陈文卓 | Acceleration of gravity experiment teaching aid |
| CN104966438A (en) * | 2015-07-31 | 2015-10-07 | 湖南城市学院 | Experimental instrument measuring gravitational acceleration through falling body method |
| CN105261263A (en) * | 2015-11-22 | 2016-01-20 | 湖南城市学院 | Freefall motion experimental instrument |
| CN106373464A (en) * | 2016-10-31 | 2017-02-01 | 滕德虎 | Free fall gravity acceleration measuring device |
| CN206619320U (en) * | 2017-03-10 | 2017-11-07 | 韩晨希 | A kind of portable movement of falling object experiment instrument |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108269467A (en) * | 2018-03-14 | 2018-07-10 | 方浩然 | A kind of experiment with falling objects apparatus for demonstrating |
| CN109345921A (en) * | 2018-10-18 | 2019-02-15 | 华北理工大学 | A kind of simplified teaching mode of mechanics |
| CN109461352A (en) * | 2018-12-21 | 2019-03-12 | 刘家铮 | A kind of high school physics experiment with falling objects simulator |
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| PB01 | Publication | ||
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Application publication date: 20170510 |