CN205670402U - A kind of speed measuring device - Google Patents
A kind of speed measuring device Download PDFInfo
- Publication number
- CN205670402U CN205670402U CN201620000517.5U CN201620000517U CN205670402U CN 205670402 U CN205670402 U CN 205670402U CN 201620000517 U CN201620000517 U CN 201620000517U CN 205670402 U CN205670402 U CN 205670402U
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- China
- Prior art keywords
- vacuum
- glass tube
- flat board
- measuring device
- speed measuring
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Abstract
This utility model provides a kind of speed measuring device, and including the glass tube with vacuum being vertically arranged and tachymeter, the top of glass tube with vacuum seals, bottom is connected to water pipe, glass tube with vacuum is L-shaped with water pipe, and one end of water pipe is tightly connected with glass tube with vacuum, and the other end of water pipe is provided with suction interface；The top outer of glass tube with vacuum is provided with Magnet, is provided with iron block at the inside top correspondence Magnet of glass tube with vacuum；Glass tube with vacuum is externally provided with fixed mount, and fixed mount includes base and flat board, and base is connected with flat board by adjusting rod, and one end of this adjusting rod is fixed with base, and the other end is flexibly connected with flat board；Flat board is provided with fixing bar, and flat board is provided with fixing hole, and glass tube with vacuum passes this fixing hole, and flat board is provided with the adjustment hole corresponding with adjusting rod, and fixing bar is overall in triangular pyramid, is provided with measuring cell in glass tube with vacuum.
Description
Technical field
This utility model relates to physics field, is specifically related to a kind of speed measuring device.
Background technology
Principle of work and power starts from mechanical energy and external force and conservative force acting, and the rear extraction law of conservation of mechanical energy and preservation of energy are fixed
Rule.1847, joule was done by the device that changes mechanical energy is heat energy and has been still considered as best experiment so far.Utilize gravity
Potential energy converting and energy is that the principle of kinetic energy carrys out the movement of falling object tested by studying object that authentication function is changed, and uses newton fortune
Dynamic formula of learning calculates with kinetic energy theorem etc., and analysis result and notional result carry out verification of error analysis function afterwards
Conversion.The Major Difficulties of this experiment is the measurement of object end speed instantaneous value.
Utility model content
In order to solve problems of the prior art, this utility model provides a kind of speed measuring device.
A kind of speed measuring device of the present utility model is adopted the technical scheme that, including the glass tube with vacuum being vertically arranged with
Tachymeter, the top of described glass tube with vacuum seals, and bottom is connected to water pipe, and one end of described water pipe is with the vacuum glass seal of tube even
Connecing, the other end of water pipe is provided with suction interface；The top outer of described glass tube with vacuum is provided with Magnet, the top of glass tube with vacuum
It is provided with iron block at the corresponding Magnet in inner side.
Described glass tube with vacuum is L-shaped with water pipe.
Described glass tube with vacuum is externally provided with fixed mount, and described fixed mount includes base and flat board, and described base is by regulation
Bar is connected with flat board, and one end of this adjusting rod is fixed with base, and the other end is flexibly connected with flat board；Described flat board is provided with fixing
Bar.
Described flat board is provided with fixing hole, and glass tube with vacuum passes this fixing hole.
Described flat board is provided with the adjustment hole corresponding with adjusting rod.
Described fixing bar is overall in triangular pyramid.
It is provided with measuring cell in described glass tube with vacuum.
This utility model has the advantage that relative to prior art
1, speed measuring device of the present utility model utilizes vacuum environment Measuring Object falling speed, outside getting rid of to the full extent
The interference to the object movement of falling object of boundary's factor, improves measurement accuracy.
2, speed measuring device of the present utility model is provided with measuring cell at glass tube, monitors the gas of glass tube in real time
Pressure, it is to avoid air reenters the error of measured data that glass tubing causes.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, a kind of speed measuring device of the present utility model is described in further detail.
As it is shown in figure 1, a kind of speed measuring device of the present utility model includes glass tube with vacuum 1 and the tachymeter being vertically arranged
10, the top of glass tube with vacuum 1 seals, and bottom is connected to water pipe 2, and glass tube with vacuum 1 is L-shaped with water pipe 2, one end of water pipe 2 and
Glass tube with vacuum 1 is tightly connected, and the other end of water pipe 2 is provided with suction interface 3；The top outer of glass tube with vacuum 1 is provided with Magnet
4, it is provided with iron block 5 at the inside top correspondence Magnet 4 of glass tube with vacuum 1.Glass tube with vacuum 1 is externally provided with fixed mount, fixed mount bag
Including base 6 and flat board 7, base 6 is connected with flat board 7 by adjusting rod 8, and one end of this adjusting rod 8 is fixed with base 6, the other end
It is flexibly connected with flat board 7；Flat board 7 is provided with fixing bar 9, and flat board 7 is provided with fixing hole, and glass tube with vacuum 1 is fixed through this
Hole, flat board 7 is provided with the adjustment hole corresponding with adjusting rod 8, and fixing bar 9 entirety is triangular pyramid, is provided with in glass tube with vacuum 1
Measuring cell.
The principle utilizing gravitional force to be converted to kinetic energy comes experiment freely the falling by research object of authentication function conversion
Body moves, and uses newtonian motion formula to calculate with kinetic energy theorem etc., and analysis result and notional result are carried out afterwards
Verification of error analysis power and energy.
The copper coin that a kind of speed measuring device hardness of the present utility model is bigger seals vertical glass tube with vacuum upper end, and true
The vacuum bag gas outlet, lower end of empty glass tubing is reequiped, and the most just can bleed transparent tube realizes vacuum environment；With
Through the time of photogate during timing counting tachymeter measurement iron block free-falling, calculate its its wink by measuring the diameter of iron block
Shi Sudu.
Use front permanent magnet to hold iron block, it is ensured that initial velocity is zero, to be prepared complete after, take permanent magnet gently away,
At this moment iron block just can do the movement of falling object that initial velocity is zero.
Feasibility is verified:
In a vacuum, iron block falls and belongs to freely falling body, speed v and the relation of displacement h: v2−v0 2=2gh, on ground, Zhanjiang
District, wherein
g=9.8061×(1-2.64×103×cos2ψ+7×103×cos22ψ)-3.086×10-6×Z；
Wherein ψ is the latitude value in Zhanjiang, and Z is the height of Zhanjiang height above sea level.Through lookup data, wherein ψ=21.2 degree, Guangdong
The height above sea level of ocean university the chances are Z=80m.Draw g=9.7869.
When taking away permanent magnet, iron block falls with initial velocity 0, utilizes photogate can measure the little steel ball of somewhere transparent tube
Instantaneous velocity (by little steel ball through the Time Calculation of photogate), record experimental data.Utilize useful formula: v2=
2gh with by kinetic energy theorem: 1/2mv2=mgh, can calculate theoretical velocity numerical value, when small ball rate theory value v and iron block
Instantaneous velocity measured value v is in range of error, it is known that, law of conservation of energy is correct.It follows that this device design structure
Rationally, theoretical ripe, there is feasibility.
This utility model used unit has timing counting tachymeter (JMS-1), glass tube with vacuum 1.80cm × 80.0cm, ferrum
Block, vacuum bag, pump bowl, copper post, copper coin, carbon element bar, carbon fibre line etc..
Timing counting tachymeter:
One, general introduction
JMS-1 timing counting tachymeter has a storage function, time base precision high (Microsecond grade) the number of measurement time interval
Word metrical instrument, it can count, calendar scheduling uses.
This instrument uses MCS-51 one chip microcomputer to be core, and degree of intelligence is high, and data storage and disposal ability are strong, behaviour
Making simplicity, arithmetic point, unit and range are automatically positioned, gear shift, and automatically into the intelligent video data that rounds up.Except tool
Have outside the function of general timer, coordinate with QDG-2 type air track, experiment with falling objects instrument, Experiment of Moment of Inertia instrument etc. and make
With, moreover it is possible to the experiments such as physical quantity and collision such as measuring speed, acceleration, acceleration of gravity, angular acceleration, cycle, and directly show
Show the speed of experiment and acceleration and the value of angular acceleration.
Two, technical performance
1, working condition
Power supply is alternating current, 220x(1 ± 10%) V, 50x(1 ± 5%) Hz.
Ambient temperature is-10 DEG C～+40 DEG C.
Relative humidity is not more than 85%(40 DEG C).
Working time is work continuously.
2, overall dimensions: about 230mmx210mmx100mm；Weight: about 2.5kg.
Three, explanation is operated with
1, preparation before experiment, photogate and the self-inspection of display device.
1) preparation before experiment
1. two photogate plugs are inserted No. 1, No. 2 photogate sockets；
2. connect 220V alternating current power supply, turn on the power switch；
3. automatically into self-inspection state after start；
Press [function] key the most successively, select the experiential function needed.
2) photogate and the self-inspection of display device
Start shooting or select self-checking function by function key, all will enter self-inspection state: when photogate does not has fault, screen follows
Ring shows each display device；When photogate breaks down (such as: loose contact, damage, block photogate or photogate input electricity
Break down in road), screen will flash the number of this photogate, not do circulation display work.At this moment, it is necessary to first get rid of event
Barrier, program just can continue to run with.
2, function is chosen and illustrates
Owing to the measuring principle of tachymeter is to be in the light time and then measuring and calculating speed by calculating light barrier, and the length of light barrier
Degree is 1cm, say, that the tachymeter program when dispatching from the factory has defined the width of photogate, and the diameter of our iron block
It is not 1cm, if step error will be very big so selection s2 i.e. tests the speed, so we choose S1 i.e. surveys the time gear that is in the light,
Just square instantaneous velocity can be calculated by measuring iron block diameter.S1 gear operation instruction is (other functions without using, the most not
Repeat) as follows:
With light barrier to any one photogate successively shading, screen demonstrates shading number of times and shading time successively.
1～255 experiment can be made continuously, but only store front 10 data.
By stop key, the time data of the storage of circulation display immediately.
By reset key, remove all experimental datas, can again test again.
The glass tube with vacuum that this experiment uses is lucite tube, also known as acrylic pipe (PMMA), uses LG850 raw material system
Make, water white transparency；Transparent tube total length about 80cm, external diameter 1.80cm, internal diameter 1.60cm.
This experiment iron block used weight 3.50g, length of side 0.90cm.
Vacuum bag is daily vacuum bag used, and this experiment utilizes the design of vacuum bag gas outlet to embed the tail of transparent tube
End, recycling pump bowl carries out the vacuum environment realizing in pipe of bleeding.
Other equipment
Copper post, copper coin, carbon element bar etc. uses the AB glue of PUR and high intensity for fixing device, fixing material.Permanent magnetism
Ferrum is for the iron block in glass tube with vacuum is lived in suction, and controlling its initial velocity is zero.Carbon fibre line is used for hanging weight and surveys
The vertical degree of amount transparent tube, when preventing iron block from falling and tube wall, reduction experimental error.
Fixed support
This experimental provision base uses the wooden flat board of furniture, because furniture wooden flat board quality weight, flat board flatness is high, makees
Ideal for submount material.And support is made up of two departments, it is respectively regulation part and standing part.Regulation part is positioned at flat
Below plate, with copper post, flat board is attached with base, during regulation, coordinates carbon fibre line to hang the plumb line principle of weight to device
Overall realization regulates.Owing to copper post hardness is high, again can flexible, can realize regulating vertical function, device can be made more again
It is stable, so we choose copper post as connecting the material that base is adjusted；Standing part is positioned at above flat board, uses quality
The carbon element bar that light intensity is big, fixed solution utilizes the stability of triangle to make simultaneously, makes device more stable.
Suction interface
Suction interface carries out 90 degree of switchings by water pipe, outside interface is placed in base, it is simple to the carrying out of work of bleeding, also
Reduce the impact on device.Bleeding point vacuum bag air exhaust mouth is reequiped, and by fixing with the AB glue of high intensity, thus can
Convenient realization carries out vacuum pumping to transparent tube.
Plumb line regulation vertically degree
This device regulation transparent tube is vertically spent and is used plumb line principle, utilizes carbon fibre line one end suspension weight to realize right
The detection that device is vertically spent, then adapting device regulation support be adjusted.
Adjusting means
1, according to plumb line principle, rotate iron and steel pillar and adjust the vertical degree of whole device；
2, with pump bowl, device is bled, during until the sensation pump bowl dynamics of bleeding has no change, substantially prove
Relative vacuum in transparent tube；
3, open photogate, check that photogate the most normally works, and be transferred to the gear s1 of measurement time, by photoelectricity door pocket
Position at transparent tube labelling in advance；
4, hold iron block with permanent magnet, make iron block be positioned at transparent tube center, and initial velocity is zero；
5, after ready, taking permanent magnet gently away, photogate records the iron block time through a photogate, record
Experimental data；
6, repeated measure multi-group data record.
Points for attention
1, transparent tube should be regulated as far as possible be positioned at vertical direction, touch tube wall when preventing iron block from falling and the error that causes.
2, photogate and iron block should be placed on transparent tube center as far as possible, make the infrared light velocity through transparent tube center ferrum
Block along transparent tube axis fall, when preventing iron block from falling record less than data or because iron block whereabouts time position deviation and
Velocity error scope is made to become big；
When 3, taking permanent magnet away, speed wants fast, and removes towards vertical direction as far as possible, reduces magnetic attraction and causes iron block
Displacement in horizontal direction produces error, or magnetic field affects iron block acceleration of gravity.
4, each group of experiment should measure at short notice, prevents overlong time air from reentering in transparent tube and draws
The experimental error risen.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all at this
Any amendment, equivalent and the improvement etc. made within the spirit of utility model and principle, should be included in this utility model
Protection domain within.
Claims (8)
1. a speed measuring device, it is characterised in that: include glass tube with vacuum (1) and the tachymeter (10) being vertically arranged, described very
The top of empty glass tubing (1) seals, and bottom is connected to water pipe (2), and one end of described water pipe (2) seals even with glass tube with vacuum (1)
Connecing, the other end of water pipe (2) is provided with suction interface (3)；The top outer of described glass tube with vacuum (1) is provided with Magnet (4), vacuum
Inside top correspondence Magnet (4) place of glass tubing (1) is provided with iron block (5).
2. a kind of speed measuring device as claimed in claim 1, it is characterised in that: described glass tube with vacuum (1) becomes L with water pipe (2)
Shape.
3. a kind of speed measuring device as claimed in claim 2, it is characterised in that: described glass tube with vacuum (1) is externally provided with fixed mount.
4. a kind of speed measuring device as claimed in claim 3, it is characterised in that: described fixed mount includes base (6) and flat board
(7), described base (6) is connected with flat board (7) by adjusting rod (8), and one end of this adjusting rod (8) is fixed with base (6), another
End is flexibly connected with flat board (7)；Described flat board (7) is provided with fixing bar (9).
5. a kind of speed measuring device as claimed in claim 4, it is characterised in that: described flat board (7) is provided with fixing hole, vacuum glass
Glass pipe (1) passes this fixing hole.
6. a kind of speed measuring device as claimed in claim 5, it is characterised in that: described flat board (7) is provided with and adjusting rod (8) phase
Corresponding adjustment hole.
7. a kind of speed measuring device as claimed in claim 6, it is characterised in that: described fixing bar (9) is overall in triangular pyramid.
8. a kind of speed measuring device as claimed in claim 7, it is characterised in that: described glass tube with vacuum is provided with measuring cell in (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620000517.5U CN205670402U (en) | 2016-01-03 | 2016-01-03 | A kind of speed measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620000517.5U CN205670402U (en) | 2016-01-03 | 2016-01-03 | A kind of speed measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205670402U true CN205670402U (en) | 2016-11-02 |
Family
ID=57192964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620000517.5U Expired - Fee Related CN205670402U (en) | 2016-01-03 | 2016-01-03 | A kind of speed measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205670402U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106652485A (en) * | 2016-12-14 | 2017-05-10 | 宁夏煜隆科技有限公司 | Intelligent road speed measuring device |
| CN110174525A (en) * | 2019-05-31 | 2019-08-27 | 中国平煤神马能源化工集团有限责任公司 | A kind of high speed solid-liquid two-phase flow abrasive material speed-measuring method and device |
-
2016
- 2016-01-03 CN CN201620000517.5U patent/CN205670402U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106652485A (en) * | 2016-12-14 | 2017-05-10 | 宁夏煜隆科技有限公司 | Intelligent road speed measuring device |
| CN106652485B (en) * | 2016-12-14 | 2020-08-18 | 王敏帆 | Intelligent road speed measuring device |
| CN110174525A (en) * | 2019-05-31 | 2019-08-27 | 中国平煤神马能源化工集团有限责任公司 | A kind of high speed solid-liquid two-phase flow abrasive material speed-measuring method and device |
| CN110174525B (en) * | 2019-05-31 | 2021-02-26 | 中国平煤神马能源化工集团有限责任公司 | Method and device for measuring speed of high-speed solid-liquid two-phase flow abrasive material |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20161102 Termination date: 20190103 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |