CN103632591A - Comprehensive tester for mechanical vibration of single-DOF system - Google Patents
Comprehensive tester for mechanical vibration of single-DOF system Download PDFInfo
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- CN103632591A CN103632591A CN201310642210.6A CN201310642210A CN103632591A CN 103632591 A CN103632591 A CN 103632591A CN 201310642210 A CN201310642210 A CN 201310642210A CN 103632591 A CN103632591 A CN 103632591A
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Abstract
The invention relates to a comprehensive tester for mechanical vibration of a single-DOF system and particularly provides a mechanical vibration tester for university physics and physical vibration courses in science and technology universities. The tester comprises a support panel component, a paper feed mechanism and an excitation mechanism. Both the paper feed mechanism and the excitation mechanism are mounted on the support panel component. The paper feed mechanism is driven by a step motor, and a driving roller and a driven roller drive a paper tape which passes a roll positioning area at a certain speed. A grooved wheel is mounted on an output shaft of an excitation motor in the excitation mechanism and provided with a pull pin. The pull pin is nested in a wheel groove of a forced vibrating plate which is mounted on a linear guide and which excites a vibrator to vibrate. Under coaction of the paper feed mechanism and the excitation mechanism, teaching demonstrations for vibrations such as simple harmonic vibration, forced vibration and free vibration and drawing of experimental waveforms are achieved.
Description
Technical field
The present invention relates to mechanical vibration test and experimental demonstration technology, be specially a kind of single-mode system mechanical vibration comprehensive test instrument.
Background technology
In resonable College Physics in Engineer Colleges and mechanical vibration course, single-mode system vibration is basis and the emphasis content of courses.A large amount of multi degree systems that reality exists in engineering nonlinear system vibration problem of unifying can be converted to single-degree-of-freedom and solves.Understand and grasp concept, curve, parameter and the conclusion of single-mode system vibration, particularly important for the further study raising in this field.
At present domestic mechanical vibration and for vibration control experiment vibrator, acceleration transducer and signal converter etc. by virtual instrument and computer simulation, complete, the single-mode system difference on this experimental provision type and teaching material is larger.In single-mode system vibration, often to demonstrate vibration processes and oscillating curve that object is done simple harmonic oscillation and other mechanical vibration, need more intuitive understanding vibration parameters for the impact of oscillating curve.Therefore, need a kind of simple and convenient, easy operating, and the theoretical gap of single-degree-of-freedom is less, the device that can complete multiple single-mode system vibration experiment.
Summary of the invention
For the deficiencies in the prior art part, the technical matters that quasi-solution of the present invention is determined is that a kind of single-mode system mechanical vibration comprehensive test instrument is provided.This experiment instrument can be realized the demonstration of the vibrations such as simple harmonic oscillation, forced vibration, free vibration and the drafting of waveform.
The scheme that the present invention solves described single-mode system mechanical vibration comprehensive test instrument technical matters is: design a kind of single-mode system mechanical vibration comprehensive test instrument, it comprises supported panel assembly, paper advance mechanism and exciting agency, and described paper advance mechanism and exciting agency are installed on support panel.
Described supported panel assembly comprises support panel and lower margin, and four lower margins are arranged on the lower surface of support panel;
Described paper advance mechanism comprises stepper motor, and stepper motor is arranged on stepper motor support, and stepper motor support is screwed in the upper surface of support panel; Stepper motor output shaft is installed shaft coupling, by shaft coupling, power is reached to active roller, and active roller two is installed bearing and is fixed on active roller bearing seat, and bearing seat is arranged on support panel upper surface; Return idler is installed directly over active roller, return idler two is installed bearing and is fixed in pressure adjustment block, pressure adjustment block is arranged in the sliding tray on active roller bearing seat, active roller bearing seat upper surface install to adjust screw panel, adjust on screw panel and install and adjust the adjustment that screw is realized roller pressure; Paper web installing plate is connected by screw and is fixed on support panel, paper web installation shaft is bolted and is fixed on paper web installing plate, in paper web installation shaft, cover has spacer, paper web is enclosed within on spacer and is convenient for changing, axle sleeve is installed by paper web in the both sides of paper web paper web baffle plate, axle sleeve limited location piece is installed by paper web in the side of paper web baffle plate, and limited block is fixed in paper web installation shaft by holding screw; Pressure roller two is installed bearing and is also fixed in pressure adjustment block, and pressure adjustment block is arranged in the sliding tray in pressure roller shaft bearing, pressure roller shaft bearing upper surface install and adjust screw panel, adjust on screw panel and install and adjust the adjustment that screw is realized pressure roller pressure; Tray paper panel is installed under pressure roller, and tray paper panel is connected by screw the upper surface that is fixed on support panel.
Described exciting agency comprises shock electric machine, shock electric machine is arranged on shock electric machine support, shock electric machine support is connected by screw and is fixed on support panel upper surface, on the output shaft of shock electric machine, sheave is installed, finger is installed on sheave, and finger is inserted in the sheave groove of forced vibration plate, and forced vibration plate is arranged on line slideway, line slideway is arranged in line slideway back up pad, and line slideway back up pad is connected by screw on the upper surface that is fixed on support panel; Oscillating curve drawing pen is arranged on oscillating mass piece, mounting spring contiguous block directly over oscillating mass piece, on oscillating mass piece, linear bearing is installed, linear bearing is enclosed within on quenching optical axis, optical axis back up pad is installed at quenching optical axis two ends, spring contiguous block is installed directly over optical axis back up pad, and optical axis back up pad is connected by screw and is fixed on support panel; Damping sheet is connected by screw and is arranged on damping cylinder, and damping cylinder lower surface is installed cylinder cushion block, and cylinder cushion block is connected by screw and is fixed on support panel.
Compared with prior art, a kind of single-mode system mechanical vibration of the present invention comprehensive test instrument has following characteristics:
1. experiment effect is good.The present invention specifically can realize simple harmonic oscillation, has damping free vibration, the forced vibration under harmonic excitation power, the forced vibration under cycle exciting force, the comprehensive demonstration of the single-mode system vibrations such as forced vibration under exciting force arbitrarily and the drafting of waveform.
2. human oriented design.A kind of single-mode system mechanical vibration of the present invention comprehensive test instrument adopts human oriented design, and the easy to operate use that is simple and easy to can change oscillator quality by increase and decrease mode, changes the spring of different-stiffness and change damping by increase and decrease cylinder pressure.
3. directly perceived and good economy performance.Apparatus of the present invention adopt mechanical vibration structure to adopt the corresponding spring-damping-quality system of single-mode system theory of oscillation, are convenient to understand and grasp experiment content.Device utilizes paper tape to realize collection and the demonstration of vibration, carries out tracing analysis and parameter and process on paper tape.
Accompanying drawing explanation
Fig. 1 is the complete machine structure schematic diagram of a kind of embodiment of single-mode system mechanical vibration comprehensive test instrument of the present invention.
Embodiment
Below in conjunction with embodiment and in detail further narration the present invention of accompanying drawing thereof.
The single-mode system mechanical vibration comprehensive test instrument (referring to Fig. 1) of the present invention's design comprises supported panel assembly 1, paper advance mechanism 2, exciting agency 3.
Described supported panel assembly 1 comprises that support panel 1.2 and 1.1, four lower margins 1.1 of lower margin are arranged on the lower surface of support panel 1.2;
Described paper advance mechanism 2 comprises stepper motor 2.21, and stepper motor 2.21 is arranged on stepper motor support 2.22, and stepper motor support 2.22 is screwed in the upper surface of support panel 1.2; Stepper motor 2.21 output shafts are installed shaft coupling 2.20, by shaft coupling 2.20, power is reached to active roller 2.17, active roller 2.17 two are installed bearing 2.19 and are fixed on active roller bearing seat 2.11, and bearing seat 2.11 is arranged on support panel 1.2 upper surfaces; Return idler 2.16 is installed directly over active roller 2.17, return idler 2.16 two are installed bearing 2.18 and are fixed in pressure adjustment block 2.15, pressure adjustment block 2.15 is arranged in the sliding tray on active roller bearing seat 2.11, active roller bearing seat 2.11 upper surface install to adjust screw panel 2.14, adjust on screw panel 2.14 and install and adjust the adjustment that screw is realized roller pressure; Paper web installing plate 2.12 is connected by screw and is fixed on support panel 1.2, paper web installation shaft 2.2 is bolted and is fixed on paper web installing plate 2.12, in paper web installation shaft 2.2, cover has spacer 2.3, paper web is enclosed within on spacer 2.3 and is convenient for changing, there is paper web baffle plate (2.5,2.1) both sides of paper web by paper web installation shaft 2.2 covers, the side of paper web baffle plate (2.5,2.1) is by paper web installation shaft 2.2 cover limited location pieces 2.4, and limited block 2.4 is fixed in paper web installation shaft 2.2 by holding screw; Pressure roller 2.25 two are installed bearing 2.24 and are fixed in pressure adjustment block 2.23, pressure adjustment block 2.23 is arranged in the sliding tray in pressure roller shaft bearing 2.6, pressure roller shaft bearing 2.6 upper surface install to adjust screw panel 2.26, adjust on screw panel 2.26 and install and adjust the adjustment that screw is realized pressure roller pressure; Tray paper panel 2.13 is installed under pressure roller 2.25, and tray paper panel 2.13 is connected by screw the upper surface that is fixed on support panel 1.2;
Described exciting agency 3 comprises shock electric machine 3.10, shock electric machine 3.10 is arranged on shock electric machine support 3.11, shock electric machine support 3.11 is connected by screw and is fixed on support panel 1.2 upper surfaces, sheave 3.9 is installed on the output shaft of shock electric machine 3.10, finger 3.8 is installed on sheave, finger 3.8 is inserted in the sheave groove of forced vibration plate 3.2, forced vibration plate 3.2 is arranged on line slideway 3.3, line slideway 3.3 is arranged in line slideway back up pad 3.1, and line slideway back up pad 3.1 is connected by screw on the upper surface that is fixed on support panel 1.2; Oscillating curve drawing pen 3.7 is arranged on oscillating mass piece 3.6, mounting spring contiguous block 3.5 directly over oscillating mass piece 3.6, linear bearing 3.18 is installed on oscillating mass piece 3.6, linear bearing 3.18 is enclosed within on quenching optical axis 3.17, optical axis back up pad 3.16 is installed at quenching optical axis 3.17 two ends, spring contiguous block 3.15 is installed directly over optical axis back up pad 3.16, and optical axis back up pad 3.16 is connected by screw and is fixed on support panel 1.2; Damping sheet 3.12 is connected by screw and is arranged on damping cylinder 3.13, and damping cylinder 3.13 lower surfaces are installed cylinder cushion block 3.14, and cylinder cushion block 3.14 is connected by screw and is fixed on support panel 1.2.
The mentality of designing of single-mode system mechanical vibration comprehensive test instrument of the present invention is as follows: the design intends realizing the comprehensive demonstration of the vibrations such as simple harmonic oscillation, forced vibration, free vibration and the drafting of waveform, adopt stepper motor as power, to realize the transmission of paper, design in addition a set of exciting agency and realize simple harmonic oscillation, forced vibration and free vibration.
Single-mode system oscillatory differential equation is:
In formula: m is oscillator quality; C is vibrational system damping; K is spring rate;
F (t) is vibrational system input, i.e. exciting force;
When F (t) equals 0, system is automatic vibration;
When F (t) is not equal to 0, system is forced vibration.
Solve the x (t) that the differential equation obtains and be time-domain response curve, by analytic curve, can obtain vibration period T.
By the determined natural frequency of system input parameter
with the resulting natural frequency of response curve
contrast, verify the consistance of single-degree of freedom vibration theory and experimental result.
The main inventive point of single-mode system mechanical vibration comprehensive test instrument of the present invention is: system adopts the design technology project of electromechanical integration, realizes the comprehensive demonstration of the vibrations such as simple harmonic oscillation, forced vibration, free vibration and the drafting of waveform.
The principle of work of single-mode system mechanical vibration comprehensive test instrument of the present invention is: the course of work of single-mode system mechanical vibration comprehensive test instrument is, single chip computer device by control system, control step motor, stepper motor drives paper to travel forward by roller, is excited at the same time mechanism's excited vibration mass and does multiple forced vibration, free vibration.
The present invention does not address part and is applicable to prior art.
Claims (7)
1. for a single-mode system mechanical vibration comprehensive test instrument for resonable College Physics in Engineer Colleges and mechanical vibration course, it is characterized in that comprising supported panel assembly, spring damping oscillator system, paper advance mechanism and exciting agency.
2. single-mode system mechanical vibration comprehensive test instrument according to claim 1, is characterized in that: straight line is determined guide rail one end and is connected with guide rail bearing by draw-in groove, can be convenient for changing the Hookean spring of various different-stiffness, and clamping is fixed again.
3. single-mode system mechanical vibration comprehensive test instrument according to claim 1, it is characterized in that: described oscillating mass piece is fixed on the moving guide rail of straight line by thread connection, change oscillator quality size and combine and connect or remove by the internal and external threads on mass.
4. single-mode system mechanical vibration comprehensive test instrument according to claim 1, it is characterized in that: the fixing bearing of described spring one end and supporting component connects, the other end and moving guide rail connect, and the mode that is connected and fixed at two ends is all that tapered thread compression is affixed.
5. single-mode system mechanical vibration comprehensive test instrument according to claim 1, it is characterized in that: described paper feed mechanism adopts stepper motor to drive driving and driven roller, thereby drive paper tape feeding, the speed of feed of paper tape is determined by the diameter of driving frequency and roller.
6. single-mode system mechanical vibration comprehensive test instrument according to claim 1, is characterized in that: in described exciting agency, on shock electric machine output shaft, sheave is installed, finger is installed on sheave, the sheave groove that finger is inserted in forced vibration plate drives exciting.
7. single-mode system mechanical vibration comprehensive test instrument according to claim 1, it is characterized in that: in described damping system, damping size regulates by changing damping cylinder air pressure, when damping cylinder and moving guide rail disconnection connection, be single-degree-of-freedom undamped system vibration condition.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310642210.6A CN103632591B (en) | 2013-11-29 | 2013-11-29 | Comprehensive tester for mechanical vibration of single-DOF system |
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| CN201310642210.6A CN103632591B (en) | 2013-11-29 | 2013-11-29 | Comprehensive tester for mechanical vibration of single-DOF system |
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| CN103632591B CN103632591B (en) | 2017-05-03 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104198166A (en) * | 2014-07-16 | 2014-12-10 | 广东工业大学 | Characteristic test device for ultrasonic vibrator of sandwich piezoelectric transducer |
| CN105258891A (en) * | 2015-10-28 | 2016-01-20 | 南京航空航天大学 | Single-degree-of-freedom vibration test device |
| CN113012511A (en) * | 2021-02-24 | 2021-06-22 | 江苏盛泽医院 | Single-degree-of-freedom system mechanical vibration comprehensive experiment instrument |
Citations (6)
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|---|---|---|---|---|
| SU399906A1 (en) * | 1971-06-15 | 1973-10-03 | Новосибирский электротехнический институт , Новосибирский институт советской кооперативной торговли | DEVICE FOR DEMONSTRATION OF VIBRATIONAL PROCESSES OF SYSTEMS |
| SU982070A1 (en) * | 1981-06-04 | 1982-12-15 | Всесоюзное Специализированное Научно-Производственное Объединение "Союзвузприбор" | Device for demonstrating oscillations |
| CN1485805A (en) * | 2003-08-29 | 2004-03-31 | 清华大学 | Forced vibration demonstration experiment instrument |
| CN2735476Y (en) * | 2004-09-21 | 2005-10-19 | 苏长武 | Experiment instrument for simple harmonic vibration of spring vibrator |
| CN102456285A (en) * | 2011-11-17 | 2012-05-16 | 浙江向阳花教学器材有限公司 | Oscillation image drawing apparatus for spring oscillator |
| CN202230648U (en) * | 2011-10-07 | 2012-05-23 | 李爽 | Damping vibration curve recorder in different mediums |
-
2013
- 2013-11-29 CN CN201310642210.6A patent/CN103632591B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU399906A1 (en) * | 1971-06-15 | 1973-10-03 | Новосибирский электротехнический институт , Новосибирский институт советской кооперативной торговли | DEVICE FOR DEMONSTRATION OF VIBRATIONAL PROCESSES OF SYSTEMS |
| SU982070A1 (en) * | 1981-06-04 | 1982-12-15 | Всесоюзное Специализированное Научно-Производственное Объединение "Союзвузприбор" | Device for demonstrating oscillations |
| CN1485805A (en) * | 2003-08-29 | 2004-03-31 | 清华大学 | Forced vibration demonstration experiment instrument |
| CN2735476Y (en) * | 2004-09-21 | 2005-10-19 | 苏长武 | Experiment instrument for simple harmonic vibration of spring vibrator |
| CN202230648U (en) * | 2011-10-07 | 2012-05-23 | 李爽 | Damping vibration curve recorder in different mediums |
| CN102456285A (en) * | 2011-11-17 | 2012-05-16 | 浙江向阳花教学器材有限公司 | Oscillation image drawing apparatus for spring oscillator |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104198166A (en) * | 2014-07-16 | 2014-12-10 | 广东工业大学 | Characteristic test device for ultrasonic vibrator of sandwich piezoelectric transducer |
| CN105258891A (en) * | 2015-10-28 | 2016-01-20 | 南京航空航天大学 | Single-degree-of-freedom vibration test device |
| CN113012511A (en) * | 2021-02-24 | 2021-06-22 | 江苏盛泽医院 | Single-degree-of-freedom system mechanical vibration comprehensive experiment instrument |
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| CN103632591B (en) | 2017-05-03 |
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