CN107036760A - A kind of three-line pendulum solid moment of inertia measures experimental rig - Google Patents
A kind of three-line pendulum solid moment of inertia measures experimental rig Download PDFInfo
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- CN107036760A CN107036760A CN201710444401.XA CN201710444401A CN107036760A CN 107036760 A CN107036760 A CN 107036760A CN 201710444401 A CN201710444401 A CN 201710444401A CN 107036760 A CN107036760 A CN 107036760A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/02—Details of balancing machines or devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/10—Determining the moment of inertia
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/08—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics
- G09B23/10—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics of solid bodies
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- Engineering & Computer Science (AREA)
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
Experimental rig is measured the invention discloses a kind of three-line pendulum solid moment of inertia, including workbench, support, uniform disc and three isometric lines, support is fixed on the table, three isometric line one end are separately fixed on the concentric circles of uniform disc, the other end is fixed on support, also include infrared analysis device, balancer, the sector of 72 deciles is divided into using graduation mark in uniform disc upper surface, and line label is entered to every graduation mark successively, infrared analysis device includes light barrier and laser detector, the present invention, graduation mark is provided with uniform disc, it is convenient for people to observe rotational angle, infrared analysis device accurately records the time for completing one group of measurement, use operation hand cradle, rotate uniform disc, avoid rocking, clamping device can clamp uniform disc, operation hand cradle and clamping device can reduce uniform disc and rock.
Description
Technical field
The invention belongs to the technical field of teaching aid, specially a kind of three-line pendulum solid moment of inertia measurement experiment dress
Put.
Background technology
Inertia size is measured when the rotary inertia of rigid body is Rigid Body in Rotation With, in the industry neck such as scientific experiment, engineering be actual
Rotary inertia is an important parameter in domain, and the value of rotary inertia depends on the shape, Mass Distribution and rotating shaft of object
Position.Industrial department is increasing to the demand of the test of rotary inertia, and three-line pendulum is because its test is simple, experiment condition is easily full
Widely utilized enough, it is the cycle by testing object under test torsionoscillation, further according to cycle and the relation of rotary inertia
Formula, calculates the value of rotary inertia.Although how the application principle comparative maturity of three-line pendulum, effectively improve measuring accuracy
It is still the problem of needing conscientiously to inquire into.At present, many work have been done in terms of measuring accuracy is improved, and proposed
Method.
ZME-1 multi-function experimental rigs include six experiment contents, and the rotation for testing complex structure using three-line pendulum is used to
Amount is an important experiment content therein.When application ZME-1 multi-function experimental rigs carry out Moment of Inertia Using Three-line Pendulum Method, using stopwatch
The conventional method of timing, i.e. manual time-keeping, this method timing test is convenient, but precision is low, what different operators acted
Sensitivity is different, makes its test result unstable.In order to reduce error, need to survey 50 the time more than cycle every time, take
When laborious, and easily error.In ZME-1 type multi-function experimental rig test process, using infrared photoelectric sensor control principle,
Using self-clocking, improve the method for testing of Period of three wire pendulum, the error produced in manual time-keeping can be avoided, improve experiment and survey
Precision is tried, can effectively ensure the stability of test result.
The content of the invention
Experimental rig is measured it is an object of the invention to provide a kind of three-line pendulum solid moment of inertia, measurement accuracy is improved,
Using more convenient.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：
A kind of three-line pendulum solid moment of inertia measurement experimental rig, including workbench, support, uniform disc and three are isometric
Line, support is fixed on the table, and three isometric line one end are separately fixed on the concentric circles of uniform disc, and the other end is fixed on
On support, in addition to infrared analysis device, balancer, the fan of 72 deciles is divided into using graduation mark in uniform disc upper surface
Shape, and enter line label to every graduation mark successively, infrared analysis device includes light barrier and laser detector, and light barrier is fixed on
Uniform disc side, the light barrier back side is provided with adhering layer, and positive centre position is provided with position line, and infrared analysis device includes
Housing, infrared reflection switch and autotimer, infrared analysis device are located on the table, and infrared reflection switch is just to gear
Output end is provided with mating plate, infrared reflection switch, output end is connected with autotimer, output end sends pulse letter
Number, autotimer record is completed the time of one group of measurement, and balancer includes operation hand cradle, clamping device, and operation hand cradle is by propping up
Foot lever and Handheld Division composition, Handheld Division include straight-bar and the flat structure positioned at straight-bar top, and branch foot lever waits stock by three
Body is constituted, and three body of rod one end are fixed on straight-bar bottom, and angle each other is 60 °, and the angle between straight-bar is
120 °, clamping device includes support frame, cylinder and gripping block, and support frame is fixed on workbench both sides, and with uniform disc
Diameter line is symmetrical, and cylinder is arranged on support frame, and gripping block is fixed on the piston rod part of cylinder.
Further, two cylinders receive a controller control, realize synchronous open with stopping.
Further, branch foot lever bottom is provided with rubber layer.
The beneficial effects of the invention are as follows：
Graduation mark is provided with uniform disc, is convenient for people to observe rotational angle, infrared analysis device has accurately been recorded
Into the time of one group of measurement, using operation hand cradle, uniform disc is rotated, it is to avoid rock, clamping device can clamp uniform disc,
Operation hand cradle and clamping device can reduce uniform disc and rock.
Brief description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
Fig. 1 is schematic structural view of the invention.
Fig. 2 is schematic structural view of the invention.
Fig. 3 is infrared analysis device principle schematic of the present invention.
Embodiment
Embodiments of the invention are described in detail below in conjunction with accompanying drawing, but the present invention can be defined by the claims
Implement with the multitude of different ways of covering.
As shown in drawings, a kind of three-line pendulum solid moment of inertia measurement experimental rig, including workbench 1, support 2, homogeneous
Disk 3 and three isometric lines 4, support 2 are fixed on workbench 1, and three isometric one end of line 4 are separately fixed at uniform disc 3
On concentric circles, the other end is fixed on support 2, three mutual levels of isometric line 4, the soft filament of selection tension, in addition to infrared
Device 5, balancer are determined, the sector of 72 deciles is divided into using graduation mark 30 in the upper surface of uniform disc 3, and successively to every
The line of bar scale 30 enters line label 31, and infrared analysis device 5 includes light barrier 50 and laser detector 51, and light barrier 50 is fixed on homogeneous
The side of disk 3, the back side of light barrier 50 is provided with adhering layer, and adhering layer can use VELCRO etc., by light barrier after the completion of experiment
50 take off, by uniform disc 3, positive centre position is provided with position line 52, position line in the adhesion of light barrier 50 when using
52 are provided with sophisticated just to graduation mark 30 in tip, the good light barrier 50 of adhesion, position line 52, and infrared analysis device 51 includes shell
Body, infrared reflection switch 53 and autotimer 54, infrared analysis device 51 are located on workbench 1, infrared reflection switch
53 just to light barrier 50, is provided with output end on infrared reflection switch 53, output end is connected with autotimer 54, output
End sends pulse signal, and the record of autotimer 54 is completed the time of one group of measurement, and one group of measurement can be the 50 of uniform disc 3
It is secondary to swing naturally, swing every time, light barrier 50 can be by infrared reflection switch 53, by once on uniform disc 3
Record once, after recording 50 times, the time is shown on autotimer 54, record is accurate, balancer includes operation hand cradle
60th, clamping device 61, operation hand cradle 60 is made up of branch foot lever 62 and Handheld Division 63, and Handheld Division 63 includes straight-bar 64 and positioned at straight-bar
The flat structure 65 on 64 tops, branch foot lever 62 is made up of three isometric bodies of rod, and three body of rod one end are fixed on the bottom of straight-bar 64,
Angle each other is that the angle between 60 °, with straight-bar 64 is 120 °, and the bottom of branch foot lever 62 is provided with rubber layer 66, behaviour
Make personnel and flat structure 65 is pinched with hand, uniform disc 3 is withstood in the bottom of branch foot lever 62, and operating process is tried one's best merrily and lightheartedly, reduces pressure
Compel uniform disc 3, rotate branch foot lever 62, drive uniform disc 3 to rotate and be less than 5 °, homogeneous person's disk 3 is rotated using operation hand cradle 60,
The horizontal direction of uniform disc 3 is avoided to offset, clamping device includes support frame 67, cylinder 68 and gripping block 69, support frame 67 is consolidated
The both sides of workbench 1 are scheduled on, and it is symmetrical with the diameter line of uniform disc 3, and cylinder 68 is arranged on support frame 67, and gripping block 69 is consolidated
The piston rod part of cylinder 68 is scheduled on, two cylinders 68 receive a controller 6 and controlled, realizes synchronous unlatching with stopping, two
The distance at cylinder 68 to the edge of uniform disc 3 is identical, opens cylinder 68, and two gripping blocks 69 clamp uniform disc 3, it is to avoid
The vertical direction of matter disk 3 is offset, and to sum up balancer effectively can avoid uniform disc from rocking, and improves test accuracy.
Uniform disc 3 is rotated using operation hand cradle 60 to rotate, operation hand cradle 60 is preferably able to be placed on the circle of uniform disc 3
Heart position, three contact points of branch foot lever 62 and uniform disc 3 are located on a concentric circles, and the arm of operating personnel is preferably able to
Level is in ground, and the rotational angle of homogeneous person's disk 3 is less than 5 °, after the completion of rotation, using gripping means grips uniform disc 3, this
When, operation hand cradle 60 is taken out from uniform disc 3, cylinder 68 is closed after taking-up, piston rod bounces back, the Spontaneous release of uniform disc 3,
The record of infrared analysis device 5 completes the time of one group of test, and the test procedure of this experiment is consistent according to original test procedure.
The embodiments of the present invention described above are not intended to limit the scope of the present invention, any in the present invention
Spirit and principle within the modifications, equivalent substitutions and improvements made etc., should be included in the claim protection model of the present invention
Within enclosing.
Claims (3)
1. a kind of three-line pendulum solid moment of inertia measurement experimental rig, including workbench, support, uniform disc and three are isometric
Line, support is fixed on the table, and three isometric line one end are separately fixed on the concentric circles of uniform disc, and the other end is fixed on
On support, it is characterised in that also including infrared analysis device, balancer, be divided into uniform disc upper surface using graduation mark
The sector of 72 deciles, and enter line label to every graduation mark successively, infrared analysis device includes light barrier and laser detector, gear
Mating plate is fixed on uniform disc side, and the light barrier back side is provided with adhering layer, and positive centre position is provided with position line, infrared
Analyzer includes housing, infrared reflection switch and autotimer, and infrared analysis device is located on the table, infrared reflection
Switch is provided with output end, output end is connected with autotimer just to light barrier on infrared reflection switch, and output end is sent out
Go out pulse signal, autotimer record is completed the time of one group of measurement, and balancer includes operation hand cradle, clamping device, operation
Hand cradle is made up of branch foot lever and Handheld Division, and Handheld Division includes straight-bar and the flat structure positioned at straight-bar top, and branch foot lever is by three
The isometric body of rod composition of root, three body of rod one end are fixed on straight-bar bottom, and angle each other is 60 °, the folder between straight-bar
Angle is 120 °, and clamping device includes support frame, cylinder and gripping block, and support frame is fixed on workbench both sides, and with homogeneous
The diameter line of disk is symmetrical, and cylinder is arranged on support frame, and gripping block is fixed on the piston rod part of cylinder.
2. three-line pendulum solid moment of inertia according to claim 1 measures experimental rig, it is characterised in that two cylinders connect
A controller control is received, synchronous open with stopping is realized.
3. three-line pendulum solid moment of inertia according to claim 1 measures experimental rig, it is characterised in that branch foot lever bottom
It is provided with rubber layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710444401.XA CN107036760A (en) | 2017-06-13 | 2017-06-13 | A kind of three-line pendulum solid moment of inertia measures experimental rig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710444401.XA CN107036760A (en) | 2017-06-13 | 2017-06-13 | A kind of three-line pendulum solid moment of inertia measures experimental rig |
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| Publication Number | Publication Date |
|---|---|
| CN107036760A true CN107036760A (en) | 2017-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710444401.XA Pending CN107036760A (en) | 2017-06-13 | 2017-06-13 | A kind of three-line pendulum solid moment of inertia measures experimental rig |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107680450A (en) * | 2017-10-17 | 2018-02-09 | 西安电子科技大学 | A kind of Moment of Inertia Using Three-line Pendulum Method instrument |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1525518A1 (en) * | 1986-11-10 | 1989-11-30 | Предприятие П/Я В-2190 | Device for determining moments of inertia |
| CN200996883Y (en) * | 2006-09-15 | 2007-12-26 | 比亚迪股份有限公司 | Rotary inertia measuring device by triple-wire twisting method |
| CN201707174U (en) * | 2010-05-31 | 2011-01-12 | 包贤强 | Novel three-wire pendulum |
| CN106448362A (en) * | 2016-10-18 | 2017-02-22 | 江南大学 | Three-line pendulum facilitating control of pendulum angle |
-
2017
- 2017-06-13 CN CN201710444401.XA patent/CN107036760A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1525518A1 (en) * | 1986-11-10 | 1989-11-30 | Предприятие П/Я В-2190 | Device for determining moments of inertia |
| CN200996883Y (en) * | 2006-09-15 | 2007-12-26 | 比亚迪股份有限公司 | Rotary inertia measuring device by triple-wire twisting method |
| CN201707174U (en) * | 2010-05-31 | 2011-01-12 | 包贤强 | Novel three-wire pendulum |
| CN106448362A (en) * | 2016-10-18 | 2017-02-22 | 江南大学 | Three-line pendulum facilitating control of pendulum angle |
Non-Patent Citations (1)
| Title |
|---|
| 张天霄: ""提高ZME-1实验台转动惯量测试精度方法的探讨"", 《试验技术与试验机》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107680450A (en) * | 2017-10-17 | 2018-02-09 | 西安电子科技大学 | A kind of Moment of Inertia Using Three-line Pendulum Method instrument |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170811 |
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| RJ01 | Rejection of invention patent application after publication |