CN103456209B - A kind of acceleration of gravity measures apparatus for demonstrating and demenstration method - Google Patents
A kind of acceleration of gravity measures apparatus for demonstrating and demenstration method Download PDFInfo
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- CN103456209B CN103456209B CN201310443044.7A CN201310443044A CN103456209B CN 103456209 B CN103456209 B CN 103456209B CN 201310443044 A CN201310443044 A CN 201310443044A CN 103456209 B CN103456209 B CN 103456209B
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Abstract
The invention discloses a kind of acceleration of gravity and measure apparatus for demonstrating and demenstration method, device comprises: (a) spheroid, and lower semisphere is the solid of metal material casting, and episphere is hollow shell, adopts engineering plastics manufacture; Lower semisphere and episphere hollow shell are threaded connection; Acceleration analysis and Bluetooth transmission circuit is laid in hollow shell; B () is with the computing machine of Bluetooth function.During demonstration, described spheroid is placed in certain altitude; Make spheroid free-falling from static, while spheroid free-falling, the acceleration value that in computing machine real-time reception ball, bluetooth spreads out of, is presented on screen.Beneficial effect of the present invention is: can intuitively, the size of acceleration of gravity in physics lesson classroom teaching demonstration freely falling body dropping process easily, make student easily grasp the physical concept of acceleration of gravity, improve the quality of teaching.
Description
Technical field
The present invention relates to a kind of physics teaching demonstration apparatus, be specifically related to a kind of acceleration of gravity and measure apparatus for demonstrating.
Background technology
Acceleration of gravity is an important physical concept and physical quantity, acceleration of gravity experiments of measuring is the Physical Experiment that senior middle school and university must do, current employing experimental technique has: electromagnetic shooting point timer method, single pendulum method, freely falling body (photoelectricity door) method etc., need during experiment to measure the related physical quantities such as distance, time, acceleration of gravity numerical value is calculated again according to correlation formula, experimentation is more complicated, and error is comparatively large, is not suitable at physics lesson classroom teaching as lecture experiment.
Summary of the invention
The object of the invention is to solve Physics Classroom Teaching to lack acceleration of gravity and measure the technical matters of demonstration equipment, a kind of apparatus that may be used for senior middle school and course of University Physics classroom teaching and demonstrate gravity acceleration analysis is provided.
To achieve these goals, the present invention adopts following technical scheme:
A kind of acceleration of gravity measures apparatus for demonstrating, it is characterized in that comprising:
(a) spheroid, lower semisphere is solid, adopts metal material casting; Episphere is hollow shell, adopts engineering plastics manufacture; Lower semisphere and episphere hollow shell are threaded connection; Measurement radiating circuit is laid in episphere hollow shell; Described measurement radiating circuit is made up of acceleration transducer, single-chip microcomputer, bluetooth module, and acceleration transducer and bluetooth module are connected with single-chip microcomputer respectively;
(b) with the computing machine of Bluetooth function, for receiving the accekeration that display measurement radiating circuit spreads out of.
Preferably, the metal material that described the latter half spheroid adopts is plumbous.
Preferably, described measurement radiating circuit underneath is equipped with Rubber shock-absorbing pad.
Acceleration of gravity measures demenstration method, comprises the following steps:
1. described spheroid is placed in more than 1.2 meters height;
2. make spheroid free-falling from static, the signal that the single-chip microcomputer timing acquiring acceleration transducer measuring radiating circuit described in dropping process exports, calculate the numerical value of fall of ball acceleration, and will speed up number of degrees value and launched by bluetooth module;
3., while in fall of ball process, the acceleration value that the computing machine with Bluetooth function is spread out of by bluetooth module in bluetooth real-time reception ball, is presented on screen.
Beneficial effect of the present invention: can intuitively, the size of acceleration of gravity in physics lesson classroom teaching demonstration freely falling body dropping process easily, make student easily grasp the physical concept of acceleration of gravity, improve the quality of teaching.
Accompanying drawing explanation
Fig. 1 is sphere structure schematic diagram of the present invention;
Fig. 2 is the structural representation after spheroid upper and lower part of the present invention is separated;
Fig. 3 is electric theory diagram of the present invention;
Fig. 4 is the program flow diagram of single-chip microcomputer in ball in the embodiment of the present invention;
Fig. 5 is the computer program process flow diagram with Bluetooth function in the embodiment of the present invention.
In Fig. 1 ~ Fig. 3,1: the latter half spheroid, 2: episphere hollow shell, 3: measure radiating circuit, 4: Rubber shock-absorbing pad, 5: with the computing machine of Bluetooth function.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Sphere structure signal of the present invention is as accompanying drawing 1,2.During enforcement, the optional 6 ~ 8cm of sphere diameter; Lower semisphere 1 is solid, adopts the casting of cast iron, cast steel or the metal material such as zinc, lead, surface finish; Episphere hollow shell 2 adopts engineering plastics manufacture, thickness of shell 4mm, the engineering plastics of preferably clear, can see internal measurement radiating circuit 3 from outward.Rubber shock-absorbing pad 4 thickness that measurement radiating circuit 3 is placed below is 5mm.
Accompanying drawing 3 is electric theory diagrams of the present invention.During enforcement, measure acceleration transducer in radiating circuit 3 and can adopt single-axis acceleration sensors ADXL103, single-chip microcomputer can adopt the single-chip microcomputer of integrated A/D converter and serial line interface, and accompanying drawing 4 is its program flow diagrams.Bluetooth module selects the bluetooth module with serial line interface; Measure radiating circuit 3 and adopt powered battery, at episphere hollow shell 2 top, power switch can be installed.
During enforcement, with the computing machine 5 of Bluetooth function, the notebook computer with Bluetooth function can be selected, or the external Bluetooth adapter of common desktop PC, accompanying drawing 5 is its program flow diagrams.
With the computing machine 5 of Bluetooth function, the panel computer with Bluetooth function or smart mobile phone also can be selected.
Measurement demenstration method of the present invention, comprises the following steps:
1. the sponge of lay one piece of more than thickness 5cm on the ground, is placed in more than 1.2 meters height above sponge by described spheroid;
2. open and measure radiating circuit 3 power switch, make spheroid free-falling from static, the signal that the single-chip microcomputer timing acquiring acceleration transducer measuring radiating circuit 3 described in dropping process exports, calculate the numerical value of fall of ball acceleration, and will speed up number of degrees value and launched by bluetooth module;
3., while in fall of ball process, the acceleration value that the computing machine 5 with Bluetooth function is spread out of by bluetooth module in bluetooth real-time reception ball, is presented on screen.
Demonstrate as a comparison, at physics lesson classroom teaching, under spheroid can also being hung on a umbrella, repeat 2., 3., can see that the acceleration of fall of ball is less than 9.8m/s
2.
Claims (4)
1. acceleration of gravity measures an apparatus for demonstrating, it is characterized in that comprising:
(a) spheroid, lower semisphere (1) is solid, adopts metal material casting, and described metal material is plumbous; Episphere is hollow shell (2), adopts engineering plastics manufacture; Lower semisphere (1) and episphere hollow shell (2) are threaded connection; Lay in episphere hollow shell (2) and measure radiating circuit (3), described measurement radiating circuit (3) underneath is equipped with Rubber shock-absorbing pad (4); Described measurement radiating circuit (3) is made up of acceleration transducer, single-chip microcomputer, bluetooth module, and acceleration transducer and bluetooth module are connected with single-chip microcomputer respectively;
(b) with the computing machine of Bluetooth function or smart mobile phone, for receiving the accekeration that display measurement radiating circuit (3) spreads out of.
2. a kind of acceleration of gravity according to claim 1 measures apparatus for demonstrating, and it is characterized in that, described sphere diameter is 6 ~ 8cm.
3. a kind of acceleration of gravity according to claim 1 measures apparatus for demonstrating, and it is characterized in that, described described acceleration transducer is single-axis acceleration sensors ADXL103.
4. acceleration of gravity measures the demenstration method of apparatus for demonstrating according to claim 1, it is characterized in that comprising the following steps:
1. described spheroid is placed in more than 1.2 meters height;
2. spheroid free-falling from static is made, the single-chip microcomputer timing 20ms of the measurement radiating circuit (3) described in dropping process once gathers the signal of acceleration transducer output, calculate the numerical value of fall of ball acceleration, and will speed up number of degrees value and launched by bluetooth module;
3. while fall of ball, with computing machine or the smart mobile phone of Bluetooth function, the acceleration value spread out of by bluetooth module in bluetooth real-time reception ball, is presented on screen;
4. under spheroid being hung on a umbrella, repeat 2., 3., can see that the acceleration of fall of ball diminishes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310443044.7A CN103456209B (en) | 2013-09-26 | 2013-09-26 | A kind of acceleration of gravity measures apparatus for demonstrating and demenstration method |
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| CN201310443044.7A CN103456209B (en) | 2013-09-26 | 2013-09-26 | A kind of acceleration of gravity measures apparatus for demonstrating and demenstration method |
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| CN103456209A CN103456209A (en) | 2013-12-18 |
| CN103456209B true CN103456209B (en) | 2015-09-30 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103915020B (en) * | 2014-04-16 | 2015-12-16 | 陈涛 | Teaching gravity accelerates one degree of survey meters |
| CN110136550A (en) * | 2019-05-22 | 2019-08-16 | 浙江科技学院 | Freely falling body device and acceleration measurement method based on electromagnetic induction coil |
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| CN103207043A (en) * | 2013-03-27 | 2013-07-17 | 浙江理工大学 | Direct measuring device for unsteady force of interaction of shock wave and model ball |
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| JP2004205471A (en) * | 2002-12-24 | 2004-07-22 | Hirobumi Mase | Experimental apparatus for indicating ether entering from diagonal front side when accelerated to generate force |
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| CN101058022A (en) * | 2006-04-21 | 2007-10-24 | 中国科学院合肥物质科学研究院 | Embedded type digital hammer and its measuring method |
| CN101634659A (en) * | 2008-07-23 | 2010-01-27 | 中国科学院自动化研究所 | Rotating speed or speed measuring device and detection method based on accelerometer |
| CN102354466A (en) * | 2011-10-14 | 2012-02-15 | 华北电力大学（保定） | Air track experiment device |
| CN103207043A (en) * | 2013-03-27 | 2013-07-17 | 浙江理工大学 | Direct measuring device for unsteady force of interaction of shock wave and model ball |
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Effective date of registration: 20181218 Address after: 233010 409 Wu Wan Road, Yuhui District, Bengbu, Anhui Patentee after: BENGBU JINSHI NEW MATERIAL Co.,Ltd. Address before: 230031 B-1014, 10 floor, business office building, Wo Ye garden, Shushan District, Hefei, Anhui. Patentee before: HEFEI WISDOM LOTUT INTELLECTUAL PROPERTY Co.,Ltd. Effective date of registration: 20181218 Address after: 230031 B-1014, 10 floor, business office building, Wo Ye garden, Shushan District, Hefei, Anhui. Patentee after: HEFEI WISDOM LOTUT INTELLECTUAL PROPERTY Co.,Ltd. Address before: 210023 No. 3 Wenyuan Road, Xianlin University City, Qixia District, Nanjing City, Jiangsu Province Patentee before: Nanjing University of Finance and Economics |
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