CN109256018A - A kind of experiment instrument of the correlative factor of test influence frictional force - Google Patents
A kind of experiment instrument of the correlative factor of test influence frictional force Download PDFInfo
- Publication number
- CN109256018A CN109256018A CN201811268303.6A CN201811268303A CN109256018A CN 109256018 A CN109256018 A CN 109256018A CN 201811268303 A CN201811268303 A CN 201811268303A CN 109256018 A CN109256018 A CN 109256018A
- Authority
- CN
- China
- Prior art keywords
- upright bar
- frictional force
- weight beam
- conveyer belt
- transmission device
- 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
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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Algebra (AREA)
- Pure & Applied Mathematics (AREA)
- Educational Administration (AREA)
- Computational Mathematics (AREA)
- Business, Economics & Management (AREA)
- Educational Technology (AREA)
- Theoretical Computer Science (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses the experiment instruments that a kind of test influences the correlative factor of frictional force, solve traditional doing and are difficult to hold the condition for making wooden unit uniform motion, thus the problem of the frictional force inaccuracy measured in the experiment of friction measurement.The present invention includes laboratory table, weight beam, sliding block, upright bar and transmission device, the upright bar is fixed on laboratory table, the upright bar is equipped with multiple grooves, one end cap of the weight beam is in upright bar, the weight beam is equipped with display screen, tension sensor is installed in the weight beam, the tension sensor and display screen are electrically connected, the other end of the weight beam is hung on sliding block, the sliding block is placed on transmission device, the transmission device includes conveyer belt and motor, the paper slip of different degree of roughness is posted on the conveyer belt, the conveyer belt is equipped with cursor close to the two sides of upright bar one end, the cursor is connect with conveyer belt by pin shaft, the other end of the cursor is fixed on laboratory table.
Description
Technical field
The present invention relates to Physical Experiment equipment technical field, and in particular to a kind of test influences the correlative factor of frictional force
Experiment instrument.
Background technique
The inquiry experiment of friction effects factor is the common basic mechanical experiment of physics, which is usually carried out by teacher
The key point of Demonstrating, the experiment is to ensure that the uniform motion of object, suffered when with dynamometer measurement object of which movement
Frictional force, qualitative, quantitative analysis is then carried out according to the size of frictional force, then obtain influence frictional force it is several because
Element.Common experiment method is that the different degrees of paper slip of rough surface is put below wooden unit, and wooden unit is hooked on weight beam,
Weight beam is fixed on a bar, frictional force suffered by the wooden unit for pulling paper slip to survey by average rate.But paper is pulled manually
Item is difficult to grasp the dynamics pulled, it is also difficult to the speed for making paper slip uniform motion is held, it is therefore, related with frictional force surveying
When several factors, while transfer frictional force and stiction in frictional force, stiction are also the disaster in learning process
Point, thus need it is a set of it is special survey frictional force and influence frictional force factor experimental facilities, be also convenient for student intuitively observe with
Study can attract the attention of student on classroom, excite the interest of student's Active Learning.
Summary of the invention
Keep wooden unit even the technical problems to be solved by the present invention are: traditional doing is difficult to hold in the experiment of friction measurement
The condition of speed movement, thus the frictional force inaccuracy measured, are also unfavorable for the problem of realizing analysis and comparing, the present invention provides
A kind of test to solve the above problems influences the experiment instrument of the correlative factor of frictional force.
The present invention is achieved through the following technical solutions:
A kind of experiment instrument of the correlative factor of test influence frictional force, including laboratory table, weight beam, sliding block, upright bar
And transmission device, the upright bar are fixed on the laboratory table, the upright bar is equipped with multiple grooves, the weight beam
For one end cap in upright bar, the weight beam is equipped with display screen, is equipped with tension sensor in the weight beam, institute
Tension sensor and display screen is stated to be electrically connected, the weight beam two sides are equipped with key, the weight beam it is another
End is hung on sliding block, and the sliding block is placed on transmission device, and the transmission device includes conveyer belt and motor, the conveyer belt
Rotated by motor control, post the paper slip of different degree of roughness on the conveyer belt, the conveyer belt close to upright bar one end two
Side is equipped with cursor, and the cursor is connect with transmission device by pin shaft, and the other end of the cursor is fixed on laboratory table
On, the transmission device is fixed by a pin on tripod far from the two sides of upright bar one end, and the tripod is fixed on experiment
On table.
The present invention devises a kind of experiment instrument of the correlative factor of test influence frictional force, including laboratory table, spring dynamometry
Meter, sliding block, upright bar are fixed with upright bar on laboratory table, and the effect of upright bar is to hold weight beam, are equipped in upright bar multiple
Groove can block weight beam, weight beam not allowed to cover under the side of upright bar when changing the height of weight beam
Sliding, the other end of the weight beam is equipped with tension sensor, spring by hanging on sliding block in weight beam
The surface of dynamometer is equipped with display screen, and tension sensor and display screen are electrically connected, and the pulling force numerical value that tension sensor measures will
It can be shown in display screen, the weight beam will will record the static vertical bar that arrives of sliding block in slider bottom linear uniform motion mistake
Maximum pull in journey, lowest pull, wherein having sliding block static to be to the pulling force of moment that relative motion occurs with paper slip
Maximum static friction force, the vertical bar are located on conveyer belt, and the transmission has motor control, can be by adjusting motor uniform rotation
There is provided the state of a uniform motion to conveyer belt, do not need it is artificial go to pull paper slip, reduce the error of experiment, at the same
Transmission device is fixed on laboratory table by the two sides close to the transmission device of upright bar one end by cursor, the separate upright bar one
The two sides of the transmission device at end are fixed on laboratory table by tripod, and cursor is flexible and stretches, can be by transmission device branch
It supports sloping, can be used for measuring frictional force and whether gravity has relationship.The present invention has design structure simple, manufactures appearance
Easily, convenient experimental operation, the strong advantage of demonstrating visual's property can pass through the variation of transmission device height and the degree of roughness point of paper slip
It is related with which factor to analyse frictional force, more intuitively shows, while also can measure the numerical value of maximum static friction force.
Further, the laboratory table is equipped with two sets of transmission experiment instruments.It, can be more by the comparison of two sets of laboratory apparatus
Intuitive pipe clashes the difference of two groups of experiments, is more advantageous to student's understanding.
Further, the key includes power key, maximum value key, minimum key and reset key.It can be checked by button
The data of weight beam record, it can be seen that the numerical value of maximum static friction force and kinetic force of friction.
Further, the upright bar is iron, is coated with one layer of anti-corrosion material in the upright bar.In an experiment, upright bar is frequent
Using that can get rusty, needs to brush contact of the one layer of anti-corrosion material isolation irony upright bar with air outside upright bar, upright bar is avoided to be corroded,
It gets rusty.
Further, the paper slip on the conveyer belt is replaceable.When surveying the relationship of frictional force and contact surface degree of roughness
The paper slip of different degree of roughness is needed replacing, therefore society is convenient for preferably testing for replaceable.
The present invention has the advantage that and the utility model has the advantages that
1, the present invention has design structure simple, and it is easy to manufacture, convenient experimental operation, strong excellent of demonstrating visual's property
Point, can be related with which factor by the variation of transmission device height and the degree of roughness analysis frictional force of paper slip, more intuitively
It shows, while also can measure the numerical value of maximum static friction force；
2, the present invention is by the comparisons of two sets of laboratory apparatus, can more intuitive pipe clash the differences of two groups of experiments, more have
Conducive to student's understanding, and all factors related with frictional force can be tested out.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is friction experiment device schematic top plan view of the invention.
Fig. 2 is friction experiment device schematic front view of the invention.
Fig. 3 is frictional force and pressure experiment test schematic diagram of the invention.
Fig. 4 is that frictional force and gravity of the invention test test schematic diagram.
Label and corresponding parts title in attached drawing:
1- laboratory table, 2- weight beam, 3- sliding block, 4- upright bar, 5- groove, 6- display screen, 7- key, 8- conveyer belt,
9- cursor 10- paper slip, 11- tripod.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation for explaining only the invention, are not made
For limitation of the invention.
Embodiment 1
As shown in Figures 1 to 4, a kind of test influences the experiment instrument of the correlative factor of frictional force, including laboratory table 1, spring
Dynamometer 2, sliding block 3, upright bar 4 and transmission device, the upright bar 4 are fixed on the laboratory table 1, and the upright bar 4 is equipped with more
A groove 5, for an end cap of the weight beam 2 in upright bar 4, the weight beam 2 is equipped with display screen 6, the bullet
Tension sensor is installed, the tension sensor and display screen 6 are electrically connected, 2 liang of the weight beam in spring dynamometer 2
Side is equipped with key 7, and the other end of the weight beam 2 is hung on sliding block 3, and the sliding block 3 is placed on transmission device, described
Transmission device includes conveyer belt 8 and motor, and the conveyer belt 8 is rotated by motor control, is posted on the conveyer belt 8 different coarse
The paper slip 10 of degree, the conveyer belt 8 are equipped with cursor 9 close to the two sides of upright bar one end, and the cursor 9 and transmission device are logical
Pin shaft connection is crossed, the other end of the cursor 9 is fixed on laboratory table 1, two sides of the transmission device far from 4 one end of upright bar
It is fixed by a pin on tripod 11, the tripod 11 is fixed on laboratory table 1.The transfer station of experiment instrument is transmitted when two
Upper laying is the paper slip of different rough surfaces, and will open identical revolving speed makes conveyer belt with paper slip uniform rotation, makes sliding block
Relative motion at the uniform velocity occurs with paper slip, records the pulling force measured, this pulling force is frictional force, and you can get it by many experiments
Conclusion: frictional force is related with the degree of roughness of contact surface, and proportional；It, can be in cunning when verifying the relationship of frictional force and pressure
Increase sliding block on block, while can also also reset the sliding block of identical quantity on relatively rougher paper slip, and open identical speed
Degree makes conveyer belt uniform rotation, passes through many experiments, it was therefore concluded that: frictional force is related with the size of pressure, and directly proportional；When testing
When demonstrate,proving the relationship of frictional force and gravity, transmission device is supported sloping, is then turned on motor, makes conveyer belt uniform rotation and cunning
Opposite uniform motion occurs for block, records the size of frictional force, and change the tilt angle of transmission device, and increases sliding block, then remember
Record frictional force size, many experiments, it may be concluded that frictional force is unrelated with gravity.
Embodiment 2
As shown in Fig. 2, the present embodiment the difference from embodiment 1 is that, the laboratory table 1 is equipped with two sets transmission and tests
Instrument.The key 7 includes power key, maximum value key, minimum key and reset key.The upright bar 4 is iron, is applied in the upright bar
There is one layer of anti-corrosion material.Paper slip on the conveyer belt 8 is replaceable.It is needed when surveying the relationship of frictional force and contact surface degree of roughness
The paper slip of different degree of roughness is replaced, therefore society is convenient for preferably testing for replaceable.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (5)
1. a kind of test influences the experiment instrument of the correlative factor of frictional force, including laboratory table (1), weight beam (2), sliding block
(3), upright bar (4) and transmission device, which is characterized in that the upright bar (4) is fixed on the laboratory table (1), the upright bar (4)
It is equipped with multiple grooves (5), an end cap of the weight beam (2) is set on the weight beam (2) on upright bar (4)
Have display screen (6), tension sensor is installed, the tension sensor and display screen (6) are electrically in the weight beam (2)
Connection, weight beam (2) two sides are equipped with key (7), and the other end of the weight beam (2) is hung on sliding block (3),
The sliding block (3) is placed on transmission device, and the transmission device includes conveyer belt (8) and motor, and the conveyer belt (8) is by electricity
Machine control rotates, and the paper slip (10) of different degree of roughness is posted on the conveyer belt (8), the conveyer belt (8) is close to upright bar one
The two sides at end are equipped with cursor (9), and the cursor (9) connect with transmission device by pin shaft, the cursor (9) it is another
End is fixed on laboratory table (1), and the transmission device is fixed by a pin to tripod (11) far from the two sides of upright bar (4) one end
On, the tripod (11) is fixed on laboratory table (1).
2. the experiment instrument that a kind of test according to claim 1 influences the correlative factor of frictional force, which is characterized in that described
Laboratory table (1) is equipped with two sets of transmission experiment instruments.
3. the experiment instrument that a kind of test according to claim 1 influences the correlative factor of frictional force, which is characterized in that described
Key (7) includes power key, maximum value key, minimum key and reset key.
4. the experiment instrument that a kind of test according to claim 1 influences the correlative factor of frictional force, which is characterized in that described
Upright bar (4) is iron, is coated with one layer of anti-corrosion material in the upright bar.
5. the experiment instrument that a kind of test according to claim 1 influences the correlative factor of frictional force, which is characterized in that described
Paper slip on conveyer belt (8) is replaceable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811268303.6A CN109256018A (en) | 2018-10-29 | 2018-10-29 | A kind of experiment instrument of the correlative factor of test influence frictional force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811268303.6A CN109256018A (en) | 2018-10-29 | 2018-10-29 | A kind of experiment instrument of the correlative factor of test influence frictional force |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109256018A true CN109256018A (en) | 2019-01-22 |
Family
ID=65045020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811268303.6A Pending CN109256018A (en) | 2018-10-29 | 2018-10-29 | A kind of experiment instrument of the correlative factor of test influence frictional force |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109256018A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110370410A (en) * | 2019-08-15 | 2019-10-25 | 福建省南平市悦木家具有限公司 | A kind of drawing process of logs of wood lines |
| CN110874972A (en) * | 2019-11-05 | 2020-03-10 | 东北师范大学附属实验学校 | Static friction force comprehensive experiment instrument |
| CN110956878A (en) * | 2019-11-05 | 2020-04-03 | 东北师范大学附属实验学校 | Static friction force comprehensive experiment instrument and experiment method |
| CN111179669A (en) * | 2019-12-27 | 2020-05-19 | 广东德诚科教有限公司 | Method and device for quantifying physical mechanics experiment result, terminal and storage medium |
| CN112216189A (en) * | 2019-07-09 | 2021-01-12 | 周伟津 | Physics experiment mechanics tensiometer |
| CN113436512A (en) * | 2021-07-06 | 2021-09-24 | 娄洁清 | Physical friction force experiment demonstration device |
| CN113838346A (en) * | 2021-07-23 | 2021-12-24 | 湖州师范学院 | Frictional force teaching measurement system based on arduino |
| CN114659975A (en) * | 2021-12-31 | 2022-06-24 | 江南载福粉末涂料（张家港）有限公司 | Method for testing friction force of coating surface |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2447763Y (en) * | 2000-11-06 | 2001-09-12 | 广州万得福汽车电子数码检测设备有限公司 | Intelligent pressure detector |
| CN202929911U (en) * | 2012-11-22 | 2013-05-08 | 乐山师范学院 | Frictional force demonstration instrument |
| CN203475179U (en) * | 2013-09-26 | 2014-03-12 | 滁州九牧智能厨卫有限公司 | Electric clothes hanger |
| CN205068933U (en) * | 2015-09-15 | 2016-03-02 | 董占江 | Frictional force experiment appearance |
| CN205177235U (en) * | 2015-10-10 | 2016-04-20 | 济南大学 | Frictional force lecture experiment appearance |
| CN205582336U (en) * | 2016-02-25 | 2016-09-14 | 吴善方 | Frictional force presentation device is used in teaching |
| CN206271278U (en) * | 2016-10-26 | 2017-06-20 | 徐近月 | It is a kind of to can prove that frictional force with pressure about the device unrelated with gravity |
| CN206451432U (en) * | 2017-02-06 | 2017-08-29 | 刘力铭 | A kind of high school physicses friction force demonstration device |
| CN206649787U (en) * | 2017-03-31 | 2017-11-17 | 孙博楷 | A kind of frictional force experiment instrument |
| CN206757971U (en) * | 2017-04-13 | 2017-12-15 | 邵春辰 | A kind of device for measuring force of sliding friction and pressure dependence |
| CN206833771U (en) * | 2017-04-25 | 2018-01-02 | 天津农学院 | Friction force demonstration device |
| CN207425180U (en) * | 2017-07-15 | 2018-05-29 | 石颖 | A kind of friction experiment device |
| CN108230838A (en) * | 2018-01-16 | 2018-06-29 | 佛山杰致信息科技有限公司 | A kind of portable multi-function instruments used for education |
| CN207651044U (en) * | 2017-05-31 | 2018-07-24 | 杨国英 | A kind of friction force demonstration instrument |
-
2018
- 2018-10-29 CN CN201811268303.6A patent/CN109256018A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2447763Y (en) * | 2000-11-06 | 2001-09-12 | 广州万得福汽车电子数码检测设备有限公司 | Intelligent pressure detector |
| CN202929911U (en) * | 2012-11-22 | 2013-05-08 | 乐山师范学院 | Frictional force demonstration instrument |
| CN203475179U (en) * | 2013-09-26 | 2014-03-12 | 滁州九牧智能厨卫有限公司 | Electric clothes hanger |
| CN205068933U (en) * | 2015-09-15 | 2016-03-02 | 董占江 | Frictional force experiment appearance |
| CN205177235U (en) * | 2015-10-10 | 2016-04-20 | 济南大学 | Frictional force lecture experiment appearance |
| CN205582336U (en) * | 2016-02-25 | 2016-09-14 | 吴善方 | Frictional force presentation device is used in teaching |
| CN206271278U (en) * | 2016-10-26 | 2017-06-20 | 徐近月 | It is a kind of to can prove that frictional force with pressure about the device unrelated with gravity |
| CN206451432U (en) * | 2017-02-06 | 2017-08-29 | 刘力铭 | A kind of high school physicses friction force demonstration device |
| CN206649787U (en) * | 2017-03-31 | 2017-11-17 | 孙博楷 | A kind of frictional force experiment instrument |
| CN206757971U (en) * | 2017-04-13 | 2017-12-15 | 邵春辰 | A kind of device for measuring force of sliding friction and pressure dependence |
| CN206833771U (en) * | 2017-04-25 | 2018-01-02 | 天津农学院 | Friction force demonstration device |
| CN207651044U (en) * | 2017-05-31 | 2018-07-24 | 杨国英 | A kind of friction force demonstration instrument |
| CN207425180U (en) * | 2017-07-15 | 2018-05-29 | 石颖 | A kind of friction experiment device |
| CN108230838A (en) * | 2018-01-16 | 2018-06-29 | 佛山杰致信息科技有限公司 | A kind of portable multi-function instruments used for education |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112216189A (en) * | 2019-07-09 | 2021-01-12 | 周伟津 | Physics experiment mechanics tensiometer |
| CN110370410A (en) * | 2019-08-15 | 2019-10-25 | 福建省南平市悦木家具有限公司 | A kind of drawing process of logs of wood lines |
| CN110874972A (en) * | 2019-11-05 | 2020-03-10 | 东北师范大学附属实验学校 | Static friction force comprehensive experiment instrument |
| CN110956878A (en) * | 2019-11-05 | 2020-04-03 | 东北师范大学附属实验学校 | Static friction force comprehensive experiment instrument and experiment method |
| CN111179669A (en) * | 2019-12-27 | 2020-05-19 | 广东德诚科教有限公司 | Method and device for quantifying physical mechanics experiment result, terminal and storage medium |
| CN111179669B (en) * | 2019-12-27 | 2022-07-08 | 广东德诚科教有限公司 | Method and device for quantifying physical mechanics experiment result, terminal and storage medium |
| CN113436512A (en) * | 2021-07-06 | 2021-09-24 | 娄洁清 | Physical friction force experiment demonstration device |
| CN113436512B (en) * | 2021-07-06 | 2022-07-01 | 娄洁清 | Physical friction force experiment demonstration device |
| CN113838346A (en) * | 2021-07-23 | 2021-12-24 | 湖州师范学院 | Frictional force teaching measurement system based on arduino |
| CN114659975A (en) * | 2021-12-31 | 2022-06-24 | 江南载福粉末涂料（张家港）有限公司 | Method for testing friction force of coating surface |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109256018A (en) | A kind of experiment instrument of the correlative factor of test influence frictional force | |
| CN108593058B (en) | Air drag tests balance | |
| CN205177235U (en) | Frictional force lecture experiment appearance | |
| CN206906222U (en) | A kind of device for determining coefficient of friction | |
| CN206684021U (en) | A kind of static and dynamic friction coefficient measure and frictional force probe into device | |
| CN104849208B (en) | A kind of frictional coefficient of fiber test device and its method of testing | |
| CN102830061B (en) | Slippery instrument | |
| CN210346678U (en) | Slope detector | |
| CN107300523B (en) | Road surface dynamic-static friction coefficient measuring device under indoor and outdoor multi-environment state | |
| CN106813816A (en) | Counterweight balance is measured | |
| CN201935769U (en) | Tension detector for badminton racket line | |
| CN204143708U (en) | One probes into friction force rule detection instrument | |
| CN209281701U (en) | A kind of elasticity demonstration device for physics teaching | |
| CN207352831U (en) | A kind of mechanics apparatus for demonstrating for Physical Experiment | |
| CN205898262U (en) | Take hanging spring -balance of memory function | |
| CN206685015U (en) | A kind of friction measurement instrument | |
| CN209758769U (en) | actual measurement device of high-rise building elevator chimney effect | |
| CN210443075U (en) | Experimental device for researching relationship between repulsion force and distance between two magnets | |
| CN210155944U (en) | Simple teaching experiment device for measuring internal force of structure | |
| CN206057133U (en) | A kind of tester for viscosity factor | |
| CN106092442A (en) | KK bearing method rotation inerttia instrument and measuring method thereof | |
| CN207249968U (en) | A kind of centripetal force demonstrator | |
| CN207148239U (en) | Textile surface density of charge automated friction device and its system | |
| CN206639471U (en) | A kind of static balance teaching appliance | |
| CN219038644U (en) | Pencil core sliding tester |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190122 |
|
| RJ01 | Rejection of invention patent application after publication |