CN203118303U - Friction force demonstration teaching aid - Google Patents
Friction force demonstration teaching aid Download PDFInfo
- Publication number
- CN203118303U CN203118303U CN 201320174337 CN201320174337U CN203118303U CN 203118303 U CN203118303 U CN 203118303U CN 201320174337 CN201320174337 CN 201320174337 CN 201320174337 U CN201320174337 U CN 201320174337U CN 203118303 U CN203118303 U CN 203118303U
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- China
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- iron block
- character display
- friction force
- microprocessor module
- teaching aid
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Abstract
The utility model discloses a friction force demonstration teaching aid, which belongs to the field of physical teaching aids. The teaching aid comprises a platform, an iron block, a rope, a tension sensor, a handle, a proximity switch, a character display screen and a controller, wherein one end of the tension sensor is connected with the handle, and the other end of the tension sensor is connected with the right side of the iron block through the rope; the proximity switch is positioned above the left side of the iron block; and the controller comprises a power supply, a microprocessor module, an A/D (Analog/Digital) conversion module and a character display screen driving circuit. During experiment, a rightward tension is applied to the iron block through the handle, so that the iron block comes into a moving state from a static state; in the entire process, the tension value (the tension value is equal to the friction force value stressed on the iron block) stressed on iron block is detected in real time through the tension sensor; and when the experiment is finished, the friction force values stressed before and after the movement of the iron block are displayed in pages through the character display screen by the microprocessor module for students to analyze.
Description
Technical field
The utility model relates to a kind of friction force demonstration teaching aid, belongs to the physical teaching aid field.
Background technology
Friction force is a difficult point in physics teaching in secondary school, the student is difficult to understand the relation of stiction and force of sliding friction, teacher is when demonstration, normally haul iron block with spring balance and move at platform, allow the student understand the relation of stiction and force of sliding friction by the variation of observing the spring balance scale.Yet object to moving just moment, is difficult to see clearly by spring balance the process of change in friction force by quiet.
The utility model content
The utility model proposes a kind of friction force demonstration teaching aid at the problem in the background technology, and this teaching aid can show the data of friction force experiment intuitively, makes the student better understand content.
The utility model adopts following technical scheme for overcoming the above problems:
A kind of friction force demonstration teaching aid comprises platform, is positioned at iron block, rope, pulling force sensor on the platform, shakes hands, near switch, character display screen and controller; One end of described pulling force sensor is connected with handle, and its other end is connected with the right side of iron block by rope; The described top, left side that is positioned at iron block near switch; Described controller comprises power supply, microprocessor module, A/D modular converter and character display drive circuit; Described microprocessor module is by the work of character display drive circuit control character display screen; Described pulling force sensor is connected with the input end of microprocessor module by the A/D modular converter; Describedly be connected with the signal input part of microprocessor module near switch.
Preferably, described is inductance approach switch near switch.
Technique effect:
1, can show the data of friction force experiment intuitively, make the student better understand content.
2, adopt microprocessor module to control as core, with low cost, be easy to realize.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is circuit structure block diagram of the present utility model.
Label title among Fig. 1: 1, platform; 2, iron block; 3, rope; 4, pulling force sensor; 5, handle; 6, near switch; 7, character display screen.
Embodiment
Below in conjunction with accompanying drawing the technical solution of the utility model is done introduction in further detail:
Structure of the present utility model as shown in Figure 1, comprise platform 1, be positioned at iron block 2 on the platform 1, rope 3, pulling force sensor 4, handle 5, near switch 6, character display screen 7 and controller; One end of described pulling force sensor 4 is connected with handle 5, and its other end is connected with the right side of iron block 2 by rope 3; The described top, left side that is positioned at iron block 2 near switch 6, iron block 2 is positioned at the induction region near switch 6, and makes near switch 6 generation induced signals, when iron block 2 moves right, iron block 2 leaves the induction region near switch 6, changes near the induced signal of switch 6; Described is inductance approach switch near switch 6.
Circuit structure of the present utility model as shown in Figure 2, described controller comprises power supply, microprocessor module, A/D modular converter and character display drive circuit; Described microprocessor module is by 7 work of character display drive circuit control character display screen, to realize the data Presentation Function; Described pulling force sensor 4 is connected with the input end of microprocessor module by the A/D modular converter, is used for detected value of thrust is sent to microprocessor module by the A/D modular converter; Describedly be connected with the signal input part of microprocessor module near switch 6.
During experiment, 5 pairs of iron blocks 2 apply a pulling force to the right by shaking hands, make iron block 2 become motion by static, in the whole process, microprocessor module detects suffered value of thrust (this value of thrust equals the suffered friction force value of the iron block) line item of going forward side by side of iron block 2 in real time by pulling force sensor 4, when iron block 2 motions, induced signal near switch 6 changes, microprocessor module is noted this moment, and when experiment finishes, by character display screen 7 suffered friction force value paging before and after iron block 2 motions is shown, for students ' analysis.
Claims (2)
1. friction force demonstration teaching aid is characterized in that: comprise platform (1), be positioned at iron block (2) on the platform (1), rope (3), pulling force sensor (4), handle (5), near switch (6), character display screen (7) and controller; One end of described pulling force sensor (4) is connected with handle (5), and its other end is connected with the right side of iron block (2) by rope (3); The described top, left side that is positioned at iron block (2) near switch (6); Described controller comprises power supply, microprocessor module, A/D modular converter and character display drive circuit; Described microprocessor module is by character display drive circuit control character display screen (7) work; Described pulling force sensor (4) is connected with the input end of microprocessor module by the A/D modular converter; Describedly be connected with the signal input part of microprocessor module near switch (6).
2. a kind of friction force demonstration teaching aid according to claim 1, it is characterized in that: described is inductance approach switch near switch (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320174337 CN203118303U (en) | 2013-04-09 | 2013-04-09 | Friction force demonstration teaching aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320174337 CN203118303U (en) | 2013-04-09 | 2013-04-09 | Friction force demonstration teaching aid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203118303U true CN203118303U (en) | 2013-08-07 |
Family
ID=48898627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320174337 Expired - Fee Related CN203118303U (en) | 2013-04-09 | 2013-04-09 | Friction force demonstration teaching aid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203118303U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103745631A (en) * | 2014-02-17 | 2014-04-23 | 陈懋荣 | Experiment demonstration device for measuring relation between friction force and tensile force |
| CN103985291A (en) * | 2014-06-09 | 2014-08-13 | 上海市第一中学 | Training aid for measuring friction coefficient |
| CN106571090A (en) * | 2016-11-04 | 2017-04-19 | 孔晟杰 | Multifunctional physics teaching experiment table |
| CN107993535A (en) * | 2018-02-01 | 2018-05-04 | 孙鹏宇 | A kind of physical study friction force demonstration device |
| CN111067675A (en) * | 2019-12-31 | 2020-04-28 | 牛依芃 | Knee joint unicondylar pressure and frictional force measuring device |
-
2013
- 2013-04-09 CN CN 201320174337 patent/CN203118303U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103745631A (en) * | 2014-02-17 | 2014-04-23 | 陈懋荣 | Experiment demonstration device for measuring relation between friction force and tensile force |
| CN103985291A (en) * | 2014-06-09 | 2014-08-13 | 上海市第一中学 | Training aid for measuring friction coefficient |
| CN106571090A (en) * | 2016-11-04 | 2017-04-19 | 孔晟杰 | Multifunctional physics teaching experiment table |
| CN107993535A (en) * | 2018-02-01 | 2018-05-04 | 孙鹏宇 | A kind of physical study friction force demonstration device |
| CN111067675A (en) * | 2019-12-31 | 2020-04-28 | 牛依芃 | Knee joint unicondylar pressure and frictional force measuring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130807 Termination date: 20140409 |