CN201181535Y - High school physical mechanics teaching and experiment apparatus - Google Patents
High school physical mechanics teaching and experiment apparatus Download PDFInfo
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- CN201181535Y CN201181535Y CNU2007200425312U CN200720042531U CN201181535Y CN 201181535 Y CN201181535 Y CN 201181535Y CN U2007200425312 U CNU2007200425312 U CN U2007200425312U CN 200720042531 U CN200720042531 U CN 200720042531U CN 201181535 Y CN201181535 Y CN 201181535Y
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- angular velocity
- bead
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Abstract
The utility model relates to a high-school physical mechanics teaching and experimental apparatus, particularly to a high-school physical mechanics teaching and experimental apparatus using a MEMS acceleration sensor and a MEMS angular-rate sensor to measure the acceleration and the angular velocity of the object movement. The apparatus mainly comprises a device for measuring the acceleration and the angular velocity C1, in which the MEMS acceleration sensor U1, the MEMS angular rate sensor U2, a microcontroller U3 and a computer interface J1 are disposed. The outputs of the MEMS acceleration sensor U1 and the MEMS angular rate sensor U2 are connected with the input of the microcontroller U3 which output is connected with the computer interface J1.
Description
Technical field
The utility model relates to a kind of teaching and experimental apparatus, refers in particular to the middle school physical mechanics teaching and the experimental apparatus of a kind of MEMS of utilization acceleration transducer angular velocity or/and the MEMS angular-rate sensor comes the Measuring Object acceleration of motion.
Background technology
The physical mechanics teaching of existing middle school utilizes indirect methods such as measuring length, quality, time to obtain the physical quantity that can not directly measure or verify certain law by calculating with experimental apparatus mostly.In teaching and experimentation, such indirect method is unfavorable for the experience to student's visual pattern, and then causes the student can not profound understanding to some theorem, influences quality of instruction.
Summary of the invention
The purpose of this utility model is to design physical mechanics teaching of a kind of middle school and experimental apparatus, utilize up-to-date MEMS acceleration transducer and MEMS angular-rate sensor directly to obtain the characteristic parameter of object of which movement and real-time showing, reach the purpose of object teaching.
The technical scheme that provides according to the utility model, this instrument mainly comprises an acceleration or/and the measurement mechanism of angular velocity, MEMS acceleration transducer (model LIS302) is set or/and MEMS angular-rate sensor (model IDG300), microcontroller (model 8051 or PIC series) and computer interface in this device, wherein the MEMS acceleration transducer is or/and the output of MEMS angular-rate sensor is connected with the input of microcontroller, and the output of microcontroller is connected with computer interface.
The MEMS acceleration transducer gathered respectively by microcontroller or/and the output signal of MEMS angular-rate sensor is passed to computing machine with these data by computer interface then.Computing machine is correspondingly handled these data with different software according to different education experiment modules and the result is shown.
Described moving component can be a disk, on disk acceleration is set or/and the measurement mechanism of angular velocity, and acceleration is or/and there is spacing r between the center O of the measurement mechanism of angular velocity and disk.
Described moving component also can be a bead, and this bead is installed on the spring, and the two ends of spring are connected with stationary installation respectively, and acceleration and angular velocity measurement device are set on bead.Described spring can have two on first spring and second spring, and an end of first spring is connected with stationary installation, and the other end is connected with bead; Bead is connected with second spring simultaneously, and an end of second spring is connected with stationary installation.
Described moving component belongs to a kind of object that can slide on level table, connect traction rope on object, and the other end of this traction rope is connected with object after by the pulley that is installed on the level table edge, and acceleration and angular velocity measurement device are set on object.
MEMS: i.e. microelectromechanical systems is an emerging hi-tech that develops rapidly in the later stage eighties 20th century.MEMS is the integrated micro system that is made of micromechanical parts and semiconductor components and devices, and it can interrelate with real world by the interface microelectronic component, and natural informations such as sound, light, heat, magnetic, motion are carried out perception, identification, control and processing.The principal feature of MEMS is microminiaturization, multiplicity and microelectronics technology.MEMS acceleration transducer and MEMS angular-rate sensor volume in the utility model are little, in light weight, are fit to be applied to various mini-plants.
The utility model belongs to the MEMS technical applications, therefore to its other related electronic technology, and control technology, the communication technologys etc. repeat no more.
Utilize the utility model can measure middle school physical mechanics curricula and experiments such as the acceleration of the coefficient of sliding friction, measuring spring oscillator and simple harmonic oscillation image, checking centripetal acceleration formula.
Major advantage of the present utility model is that volume is little, and in light weight, low in energy consumption, intuitive is strong, the precision height, and a tractor serves several purposes can be made into very little module, and is easy for installation.
Description of drawings
Fig. 1 is for measuring the synoptic diagram of the coefficient of sliding friction.
Fig. 2 is the acceleration of measuring spring oscillator and the synoptic diagram of simple harmonic oscillation image.
Fig. 3 is the synoptic diagram of checking centripetal acceleration formula.
Fig. 4 is the block diagram of measurement mechanism
Embodiment
During manufacturing, this device is installed on the moving component of traditional experiment instrument, described traditional experiment instrument comprises: measure the experimental apparatus of the coefficient of sliding friction, acceleration and the experimental apparatus of simple harmonic oscillation image and the physical mechanics class experimental apparatuss such as experimental apparatus of checking centripetal acceleration formula of measuring spring oscillator.
One, measures the coefficient of sliding friction
With reference to Fig. 1, described moving component is object M1, during experiment, object M1 is placed on the level table P1, and the end of rope S1 connects M1, and the other end connects object M2, built-in acceleration of object M1 and angular velocity measurement device C1 by pulley H1.
Will make uniformly accelrated rectilinear motion when the object M1 on the level table P1 is subjected to pulling force that object M2 moves downward, the equation of motion is: M2g-μ M1g=(M1+M2) a
The coefficient of sliding friction be μ=(M2g-(M1+M2) a)/M1g
A is the acceleration of uniformly accelrated rectilinear motion in the formula, and g is an acceleration of gravity.
Acceleration and angular velocity measurement device C1 can directly measure the acceleration a of object M1, therefore can directly calculate the friction coefficient mu between object M1 and the level table N1.
Two, the acceleration of measuring spring oscillator and simple harmonic oscillation image
With reference to Fig. 2, described moving component is bead Q1, during experiment, the end of the first spring T1 is connected with stationary installation D1, and the other end is connected with bead Q1, and the end of the second spring T2 is connected with stationary installation D2, the other end also is connected with bead Q1, built-in acceleration of bead Q1 and angular velocity measurement device C1.
When bead Q1 under the acting force of the first spring T1 and the second spring T2, bead Q1 can make double vibrations.Acceleration and angular velocity measurement device C1 can directly measure the acceleration a of bead Q1, therefore can go out the vibrational diagram of bead Q1 by the direct real-time rendering on computers of the computer interface J1 of measurement mechanism.
Three, checking centripetal acceleration formula
With reference to Fig. 3, described moving component is disk P1, and during experiment, with ω angular frequency rotation, acceleration and angular velocity measurement device C1 are fixed in disk P1 and decentering O apart from r to disk P1 around its central point O.
Centripetal acceleration formula: a=ω
2r
Radial acceleration a can be obtained and the speed omega that cuts angle by measurement mechanism C1,, the centripetal acceleration formula can be verified because r can directly measure.
The product that the product that described MEMS acceleration transducer can adopt STMicroelectronics ST Microelectronics to produce, MEMS angular-rate sensor can adopt American I nvenSense company to produce.Described teaching and experimental apparatus can have varied, as long as degree of will speed up is installed on relevant teaching and the experimental apparatus just passable with angular velocity measurement device C1.
Claims (5)
1, teaching of middle school physical mechanics and experimental apparatus, comprise moving component, it is characterized in that: in described moving component, comprise an acceleration or/and the measurement mechanism of angular velocity (C1), MEMS acceleration transducer (U1) is set or/and MEMS angular-rate sensor (U2), microcontroller (U3) and computer interface (J1) in this measurement mechanism (C1), wherein MEMS acceleration transducer (U1) is or/and the output of MEMS angular-rate sensor (U2) is connected with the input of microcontroller (U3), and the output of microcontroller (U3) is connected with computer interface (J1).
2, middle school physical mechanics teaching as claimed in claim 1 and experimental apparatus, it is characterized in that: described moving component is disk (P1), on disk (P1), acceleration is set or/and the measurement mechanism of angular velocity (C1), and acceleration is or/and have spacing (r) between the center (O) of measurement mechanism of angular velocity (C1) and disk (P1).
3, middle school physical mechanics teaching as claimed in claim 1 and experimental apparatus, it is characterized in that: described moving component is bead (Q1), this bead (Q1) is installed on the spring, the two ends of spring are connected with stationary installation (D1) respectively, and acceleration and angular velocity measurement device (C1) are set on bead (Q1).
4, middle school physical mechanics teaching as claimed in claim 3 and experimental apparatus, it is characterized in that: described spring has two (T1, T2), and an end of first spring (T1) is connected with stationary installation (D1), and the other end is connected with bead (Q1); Bead (Q1) is connected with second spring (T2) simultaneously, and an end of second spring (T2) is connected with stationary installation (D2).
5, middle school physical mechanics teaching as claimed in claim 1 and experimental apparatus, it is characterized in that: described moving component is for going up the object (M1) that slides at level table (N1), go up connection traction rope (S1) at object (M1), the other end of this traction rope (S1) is connected with object (M2) by pulley (H1) back that is installed on level table (N1) edge, and acceleration and angular velocity measurement device (C1) are set on object (M1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200425312U CN201181535Y (en) | 2007-11-16 | 2007-11-16 | High school physical mechanics teaching and experiment apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200425312U CN201181535Y (en) | 2007-11-16 | 2007-11-16 | High school physical mechanics teaching and experiment apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201181535Y true CN201181535Y (en) | 2009-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CNU2007200425312U Expired - Fee Related CN201181535Y (en) | 2007-11-16 | 2007-11-16 | High school physical mechanics teaching and experiment apparatus |
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| CN (1) | CN201181535Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104575174A (en) * | 2014-12-24 | 2015-04-29 | 张潇月 | Speed testing device for physical experiment |
| CN106097843A (en) * | 2016-08-30 | 2016-11-09 | 广东工业大学 | A kind of kinesiology experimental system and method |
-
2007
- 2007-11-16 CN CNU2007200425312U patent/CN201181535Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104575174A (en) * | 2014-12-24 | 2015-04-29 | 张潇月 | Speed testing device for physical experiment |
| CN106097843A (en) * | 2016-08-30 | 2016-11-09 | 广东工业大学 | A kind of kinesiology experimental system and method |
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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: 20090114 Termination date: 20101116 |