CN203799535U - Maximum static friction force exploration device - Google Patents
Maximum static friction force exploration device Download PDFInfo
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- CN203799535U CN203799535U CN201420094599.5U CN201420094599U CN203799535U CN 203799535 U CN203799535 U CN 203799535U CN 201420094599 U CN201420094599 U CN 201420094599U CN 203799535 U CN203799535 U CN 203799535U
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- friction force
- data acquisition
- acquisition board
- static friction
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Abstract
The utility model discloses a maximum static friction force exploration device, which belongs to the technical field of high school physics teaching aid. A spring dynomometer, an object bearing platform and a data acquisition board are arranged on a flat plate, one end of the spring dynomometer is connected with a sliding block through a string, the sliding block is in transmission connection with a motor through a string, the sliding block is arranged on the object bearing platform, the spring dynomometer is connected with the data acquisition board, the data acquisition board is arranged between the sliding block and the spring dynomometer, a sliding needle acquires position signals of a force changing with time on the data acquisition board, the position signals are converted into data signals after being processed by an AD converter, the data signals input information through an I/O port of a single-chip microcomputer, the data information is converted into a curve variation image by taking the time as a horizontal axis and the displacement as a vertical axis, and the image is sent to a display screen for display. The changes of the static friction force along with an external force, and the magnitude of the maximum static friction force and the sliding friction force can be directly reflected through the image, and the magnitude of the maximum static friction force and the sliding friction force can be studied quantitatively, thereby bringing convenience for teaching.
Description
Technical field:
The utility model relates to a kind of device of probing into of maximum static friction force, belongs to high school physics teaching aid technical field.
Background technology:
Senior middle school physics teaching is about in mechanics part, friction force is focal points, also be a teaching difficulty, when the magnitude relationship of study force of sliding friction and maximum static friction force, student is to be based upon on teacher's instruction basis to the understanding of this part knowledge, when relatively maximum static friction force and force of sliding friction big or small, teacher is difficult to show to student their magnitude relationship with traditional experiment teaching aid.
Utility model content:
For the problems referred to above, the utility model provides a kind of device of probing into of maximum static friction force.
The utility model comprises motor, slide block, objective table, data acquisition board, slip pin, weight beam, display screen, dull and stereotyped, single-chip microcomputer and AD converter, weight beam, objective table and data acquisition board are all located on flat board, one end of weight beam is connected with slide block by cord, slide block is connected with motor driven by cord, slide block is arranged on objective table, weight beam is connected with data acquisition board, data acquisition board is arranged between slide block and weight beam, slip pin is collection power position signalling over time in data acquisition board, this position signalling is converted to data-signal after processing by AD converter, this data-signal passes through the I/O mouth of single-chip microcomputer by Data Enter, positional information is converted to and take the time as transverse axis, the curvilinear motion image that the displacement of take is the longitudinal axis is also delivered to demonstration screen display by image.
As preferably, described device also comprises level meter, and level meter is contained in dull and stereotyped one end.
The beneficial effects of the utility model are: by image, directly reflect stiction with the size of variation, maximum static friction force and the force of sliding friction of external force, and can quantitative examination maximum static friction force, the size of force of sliding friction.Abstract concept is become to particular content, be beneficial to student and understand.Demonstration by experimental provision has not only broken through teaching difficulty, and teacher can also instruct student independently to probe into, and in experiment and activity, active obtaining is perceptual experiences and take out friction force knowledge.Experimental technique provided herein is based upon in graphing calculator and collection plate system, and this design intuitively reflects friction force problem with the mode of figure by experiment, helps this knowledge point of students.
Accompanying drawing explanation:
For ease of explanation, the utility model is described in detail by following concrete enforcement and accompanying drawing.
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the theory diagram of the utility model control section.
Embodiment:
For making the purpose of this utility model, technical scheme and advantage more cheer and bright, below by the specific embodiment shown in accompanying drawing, the utility model is described.But should be appreciated that, these descriptions are exemplary, and do not really want to limit scope of the present utility model.In addition, in the following description, omitted the description to known configurations and technology, to avoid unnecessarily obscuring concept of the present utility model.
As shown in Figure 1-2, this embodiment is by the following technical solutions: it comprises motor 1, slide block 2, objective table 3, data acquisition board 4, slip pin 5, weight beam 6, display screen 7, dull and stereotyped 8, single-chip microcomputer 9 and AD converter 10, weight beam 6, objective table 3 and data acquisition board 4 are all located on dull and stereotyped 8, one end of weight beam 6 is connected with slide block 2 by cord, slide block 2 is in transmission connection by cord and motor 1, slide block 2 is arranged on objective table 3, weight beam 6 is connected with data acquisition board 4, data acquisition board 4 is arranged between slide block 2 and weight beam 6, slip pin 5 is collection power position signalling over time in data acquisition board 4, this position signalling is converted to data-signal after processing by AD converter 10, this data-signal passes through the I/O mouth of single-chip microcomputer 9 by Data Enter, positional information is converted to and take the time as transverse axis, the curvilinear motion image that the displacement of take is the longitudinal axis is also delivered to image on display screen 7 and is shown.
Wherein the upper surface of objective table 3 is the surface with certain friction factor, and dull and stereotyped 8 are provided with track 12, and slide block 2 passes through track 12 motion on dull and stereotyped 8 with data acquisition board 4.
Further, described device also comprises level meter 11, and level meter 11 is contained in one end of dull and stereotyped 8, and this structure can be observed dull and stereotyped horizontal situation at any time, to adjust in time.
The principle of work of this embodiment is: in the situation that pressure is certain, starter motor switch, motor motion pulls objective table, effect sliding block at stiction moves with objective table, pulling force on weight beam increases, until slide block uniform motion on objective table, according to the knowledge of stress balance, in the horizontal direction, pulling force and stiction are a pair of equilibrant (F=f are quiet). when pulling force increases gradually, stiction also can be along with increasing together, when pulling force is greater than maximum static friction force just, object suddenly motion gets up. in the moment of object of which movement, pulling force reduces suddenly, now data acquisition board has recorded this mutation process. the sudden change position in the figure obtaining according to sampling, the value of maximum static friction force and the figure of variation that can on display screen, find object to be subject to when pressure is certain.More than show and described ultimate principle of the present utility model and principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and instructions, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (2)
1. a maximum static friction force probes into device, it is characterized in that: it comprises motor (1), slide block (2), objective table (3), data acquisition board (4), slip pin (5), weight beam (6), display screen (7), dull and stereotyped (8), single-chip microcomputer (9) and AD converter (10), weight beam (6), objective table (3) and data acquisition board (4) are all located on flat board (8), one end of weight beam (6) is connected with slide block (2) by cord, slide block (2) is in transmission connection by cord and motor (1), slide block (2) is arranged on objective table (3), weight beam (6) is connected with data acquisition board (4), data acquisition board (4) is arranged between slide block (2) and weight beam (6), slip pin (5) is at the upper collection power of data acquisition board (4) position signalling over time, this position signalling is converted to data-signal after processing by AD converter (10), this data-signal passes through the I/O of single-chip microcomputer (9) by Data Enter, positional information is converted to and take the time as transverse axis, the curvilinear motion image that the displacement of take is the longitudinal axis is also delivered to the upper demonstration of display screen (7) by image.
A kind of maximum static friction force according to claim 1 probe into device, it is characterized in that: described device also comprises level meter (11), level meter (11) is contained in one end of flat board (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420094599.5U CN203799535U (en) | 2014-02-24 | 2014-02-24 | Maximum static friction force exploration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420094599.5U CN203799535U (en) | 2014-02-24 | 2014-02-24 | Maximum static friction force exploration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203799535U true CN203799535U (en) | 2014-08-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420094599.5U Expired - Fee Related CN203799535U (en) | 2014-02-24 | 2014-02-24 | Maximum static friction force exploration device |
Country Status (1)
| Country | Link |
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| CN (1) | CN203799535U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106546532A (en) * | 2016-12-08 | 2017-03-29 | 辽宁石油化工大学 | A kind of novel friction factor detection device |
| CN107749222A (en) * | 2017-12-15 | 2018-03-02 | 胡国领 | A kind of maximum static friction force demonstrator |
| CN111033197A (en) * | 2017-07-17 | 2020-04-17 | 普兰特Gdz股份公司 | Test strip for seals |
-
2014
- 2014-02-24 CN CN201420094599.5U patent/CN203799535U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106546532A (en) * | 2016-12-08 | 2017-03-29 | 辽宁石油化工大学 | A kind of novel friction factor detection device |
| CN111033197A (en) * | 2017-07-17 | 2020-04-17 | 普兰特Gdz股份公司 | Test strip for seals |
| CN107749222A (en) * | 2017-12-15 | 2018-03-02 | 胡国领 | A kind of maximum static friction force demonstrator |
| CN107749222B (en) * | 2017-12-15 | 2024-04-16 | 胡国领 | Maximum static friction force demonstration instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| DD01 | Delivery of document by public notice |
Addressee: Hu Cheng Document name: Notification of Acceptance of Patent Application |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140827 Termination date: 20150224 |
|
| EXPY | Termination of patent right or utility model |