CN203480733U - Horizontal modulus measurement demonstration instrument - Google Patents
Horizontal modulus measurement demonstration instrument Download PDFInfo
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- CN203480733U CN203480733U CN201320440329.0U CN201320440329U CN203480733U CN 203480733 U CN203480733 U CN 203480733U CN 201320440329 U CN201320440329 U CN 201320440329U CN 203480733 U CN203480733 U CN 203480733U
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- dressing table
- base
- housed
- stage
- leading screw
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Abstract
The utility model provides a horizontal modulus measurement demonstration instrument, wherein a trisquare, a clamp, an emitter bracket, a stage bracket and a track are successively arranged on a base and are slidably connected with and a push-pull tension gauge by means of a slide block. The end surface of the clamp jaw of the push-pull tension gauge is magnetically connected with a magnetic ring. A solid laser emitter is connected with the emitter bracket through a universal bracket. A stage arranged on the stage bracket is fixedly connected with the stage. The stage is provided with a through hole. A lens holder is arranged on the stage. The lens holder is provided with a reflector. The two sides of the lens holder are fixedly connected with rear feet and the rear feet are movably connected with the stage. The lower part of the lens holder is fixedly connected with front feet. The front feet are magnetically connected with the magnetic ring below the through hole. A leading screw is arranged on the base through a bearing. One end of the leading screw is fixedly connected with a hand wheel, and a nut is arranged on the leading screw. The nut is fixedly connected with the push-pull tension gauge. According to the technical scheme of the utility model, the horizontal modulus measurement demonstration instrument is obvious and visual in measurement phenomenon, high in measurement accuracy, convenient in operation, small in size and low in cost, wherein the magnitude of force application can be freely set.
Description
Technical field
The Young modulus that the utility model relates in Experiment of College Physics is measured demonstrator, and specifically a kind of steel wire of usining is measured demonstrator as the horizontal Young modulus of measured object.
Technical background
Hooke's law points out, in elastic range, elastomeric stress and strain is directly proportional.The scale-up factor E that stress and strain becomes is called Young modulus.Be provided with a long L of being, the radius of rank street face is d, has extended δ under external force F effect,
this formula is to ask the formula of Young modulus, but δ is smaller, is difficult for surveying accurate.
Before known by the shortcoming that steel wire is made the formula that the vertically pulls modulus measurer of measured object, be that instrument is heavy, floor area is large, add, easily cause measurement bay to rock while subtracting counterweight, the difficult searching of picture, reading and the two places, swing weight-adding office of scale in the bad control of vertical degree of instrument, operation, inconvenience debugging, the bigger error of measurement result, need telescope to assist reading, experimental phenomena is not remarkable.
Horizontal Young modulus measuring instrument structure has: " horizontal Young modulus measuring instrument " that " horizontal Young modulus measuring instrument " that application number is 200510020930.4 and application number are 200710048447.6, the common shortcoming that these two kinds of horizontal Young modulus measuring instruments exist is that the size of the application of force is limited by counterweight, can not arrange arbitrarily, counterweight drag-line is connected with dynamometer by fixed pulley, between drag-line and fixed pulley, there is friction force, steel wire pulling force is affected by friction force, increased experimental error, add again, when subtracting the pulling force of counterweight increase and decrease steel wire, while placing counterweight, can cause the chatter of steel wire and rock, there is the steel wire fracture danger of hurting sb.'s feelings, " horizontal Young modulus measuring instrument " instrument that application number is 200510020930.4 simultaneously extends to outside experiment table, and volume is larger, and putting of experiment table is restricted, application number is 200710048447.6 " horizontal Young modulus measuring instrument " though instrument can be placed on experiment table, because fixed pulley and counterweight weight increasing device take larger space at vertical direction, causes frame tall and big, and volume is still larger.
Summary of the invention
The purpose of this utility model is to provide a kind of horizontal modulus and measures demonstrator, its measure phenomenon is significantly directly perceived, measuring accuracy is high, the application of force can be set arbitrarily size and easy to operate, instrument long-pending little, cost is low.
The technical solution of the utility model is: horizontal modulus is measured demonstrator, there is base, it is characterized in that: on base, be arranged in order trisquare is installed, clamp, transmitter rack, dressing table support, track, trisquare wherein, clamp, track is connected by bolt and base, transmitter rack is connected with base sliding with dressing table support, the slide block being slidably connected is housed on track, on slide block, be fixed with pull and push dynamometer, the measuring junction of pull and push dynamometer is provided with clamp, the jaw end face of clamp is connected with magnet ring magnetic force, gimbals are housed on transmitter rack, gimbals are connected with Solid State Laser transmitter, on dressing table support, be fixed with and carry dressing table, carry dressing table and be provided with through hole, carry on dressing table mirror holder is housed, catoptron is housed on mirror holder, mirror holder both sides are fixed with metapedes, metapedes is flexibly connected with a year dressing table, under mirror holder, be fixed with front foot, front foot is connected with magnet ring magnetic force below the through hole that carries dressing table, on the base of pull and push dynamometer below, leading screw is housed, leading screw is rotationally connected by bearing and base, leading screw one end is fixed with handwheel, screw is housed on leading screw, screw and pull and push dynamometer are connected.
On base or transmitter rack, battery is housed, battery is connected with Solid State Laser transmitter by electric wire.
During use, steel wire one end is fixed on the clamp of pull and push dynamometer measuring junction, taut wire, after making steel wire straight, again the other end of steel wire is fixed with clamp, described mirror holder, catoptron, front foot and metapedes have formed the conventional optical lever of Physical Experiment, conventionally at the position on the lower side of front foot, be provided with balancing weight, make metapedes support mirror holder and catoptron keep standing vertically on year dressing table, the toe of front foot is vertically adsorbed on magnet ring, open Solid State Laser transmitter, by gimbals, adjust Solid State Laser transmitter, the laser beam of Solid State Laser transmitter transmitting is reflected on trisquare by catoptron, gently change hands wheel and drive leading screw rotation, the screw being connected with threads of lead screw drives pull and push dynamometer to move, pull and push dynamometer shows pulling force or thrust numerical value, the front foot of the optical lever of magnet ring absorption simultaneously moves, catoptron be take optical lever metapedes toe as center of circle generation deflection, the laser beam being now reflected on trisquare is carried out displacement, by the scale on trisquare, can read side-play amount, if the toe of front foot is D to the vertical range of the toe line of two metapedes, catoptron is R to the distance of trisquare, δ after optical lever is amplified on chi corresponding size be Δ L, have
the formula of substitution Young modulus
after arrangement:
this formula is to ask horizontal modulus of the present utility model to measure the formula of demonstrator measurement result.
The utility model has the advantages that: the laser that adopts the transmitting of catoptron refraction Solid State Laser transmitter, on trisquare, read the side-play amount after amplification, can make to measure that phenomenon is significantly directly perceived, substitution formula calculates, its measuring accuracy is high, adopt handwheel fine setting push-pull effort that the size, simple to operation of the application of force can be set arbitrarily, contrast prior art horizontal modulus of the present utility model measures that demonstrator is long-pending little, cost is low.
Accompanying drawing explanation
Fig. 1 is the front view that the horizontal modulus of the utility model is measured demonstrator;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is the vertical view that the horizontal modulus of the utility model is measured demonstrator.
1 trisquare in figure, 2 clamp, 3 steel wires, 4 gimbals, 5 Solid State Laser transmitters, 6 mirror holders, 7 catoptrons, 8 metapedes, 9 years dressing tables, 10 balancing weights, 11 front foots, 12 magnet rings, 13 clamps, 14 tracks, 15 pull and push dynamometer, 16 slide blocks, 17 screws, 18 leading screws, 19 handwheels, 20 bases, 21 dressing table supports, 22 transmitter racks, 23 batteries.
Embodiment
Horizontal modulus is measured demonstrator, there is base 20, it is characterized in that: trisquare 1 is installed on base successively, clamp 2, transmitter rack 22, dressing table support 21, track 14, trisquare wherein, clamp, track is connected by bolt and base, transmitter rack is connected with base sliding with dressing table support, the slide block 16 being slidably connected is housed on track, on slide block, be fixed with pull and push dynamometer 15, the measuring junction of pull and push dynamometer is provided with clamp 13, the jaw end face of clamp is connected with magnet ring 12 magnetic force, gimbals 4 are housed on transmitter rack, gimbals are connected with Solid State Laser transmitter 5, on dressing table support, be fixed with and carry dressing table 9, carry dressing table and be provided with through hole, carry on dressing table mirror holder 6 is housed, catoptron 7 is housed on mirror holder, mirror holder both sides are fixed with metapedes 8, metapedes is flexibly connected with a year dressing table, under mirror holder, be fixed with front foot 11, front foot is connected with magnet ring magnetic force below the through hole that carries dressing table, on the base of pull and push dynamometer below, leading screw 18 is housed, leading screw is rotationally connected by bearing and base, leading screw one end is fixed with handwheel 19, screw 17 is housed on leading screw, screw and pull and push dynamometer are connected.
Solid State Laser transmitter can be the word Solid State Laser transmitter with calimator, and this Solid State Laser transmitter can be launched yi word pattern laser beam, is convenient on trisquare, carry out reading, and the power supply of Solid State Laser transmitter is provided by the commercial power socket in laboratory or classroom; Because the elastic deformation amount of steel wire 3 is very little, so the screw thread between leading screw and screw adopts precision thin screw thread; Optical lever is the conventional utensil of Physical Experiment, optical lever generally by mirror holder, be arranged on catoptron on mirror holder, the front foot and the metapedes that are connected with pointed end with mirror holder form, conventionally at the position on the lower side of front foot, be provided with balancing weight 10, under free state, can make mirror holder be supported on to carry on dressing table by metapedes and remain vertically not fall; While install carrying dressing table, instrument is answered horizontal positioned, after carrying dressing table simultaneously and installing, should be also the platform of journey horizontality; Described trisquare is the chi of arc, Qi Hu center is the catoptron center of optical lever, adopt trisquare can reduce the error of measurement, improve the accuracy of measuring, when trisquare is installed, should make trisquare central authorities place at zero point contour with the catoptron center of optical lever, while changing optical lever, unclamp the set bolt of trisquare, on horizontal stand with height gauge adjust the catoptron center of trisquare height and optical lever contour after, then screw the set bolt of trisquare; The battery 23 that electric energy is provided for Solid State Laser transmitter is housed on described base or transmitter rack, battery is electrically connected to Solid State Laser transmitter by electric wire, and the object that battery is set is to make the horizontal modulus measurement demonstrator of present technique also can not measure or demonstrate in the situation that there is no electric network source.
If the toe of front foot is D to the vertical range of the toe line of two metapedes, catoptron is R to the distance of chi, δ after optical lever is amplified on chi corresponding size be Δ L, have
the formula of substitution Young modulus
after arrangement:
this formula is to ask horizontal Young modulus of the present utility model to measure the formula of demonstrator measurement result.
During use, horizontal modulus of the present utility model is measured to demonstrator to be placed on levelling bench, clamp is put into through the hole in the middle of magnet ring in steel wire one end, knob on turn clamp clamps steel wire, then magnet ring is adsorbed on to clamp front end, stretching steel wire, make steel wire straight, the other end of steel wire is put into clamp, rotate clamp handle, make clamp step up steel wire.During measurement, connect the power supply of Solid State Laser transmitter, by gimbals, adjust the inclination angle of Solid State Laser transmitter, by transmitter rack, adjust the distance of Solid State Laser transmitter and optical lever, make laser incident reflective mirror middle section, rotating Solid State Laser transmitter makes after laser rays level, adjust again polished rod bar and dressing table support, make the front foot of optical lever perpendicular to the end face of magnet ring, two metapedes are perpendicular to the dressing table that carries of level, slightly rotate optical lever, make word laser rays central authorities drop on trisquare, after locating the central zero point that the reflective mirror of rotation optical lever makes laser rays drop on trisquare, rotate again handwheel, make pull and push dynamometer indication be greater than a certain integer of 20N place, record the position of pulling force and cursor, continue equivalent and increase the pulling force that size is suitable, record the position of the corresponding cursor of pulling force, deal with data, substitution formula, just can obtain Young modulus.
During demonstration modulus measuring principle, by the set bolt of the trisquare trisquare of dismantling, laser rays is mapped on blackboard or wall, rotate handwheel to a certain suitable position (pulling force is greater than 20N, and handwheel is done an eye-catching red streak mark, and mark is alignd with the edge of track), this position of mark on blackboard, the every rotation of handwheel one week, represents that pulling force increment is identical, position of correspondence markings.The distance approximately equal of adjacent marker, represents that pulling force is directly proportional to shape amount, demonstrates modulus measuring principle.
It is all little that horizontal modulus of the present utility model is measured the existing known volume of demonstrator volume ratio, owing to having simplified experimental provision, saved material and die size, the low cost of manufacture of instrument; Acting force on equivalent increase and decrease steel wire, is not limited by counterweight, can, according to the size of steel wire parameter difference and laser rays displacement on trisquare, the size of increase and decrease equivalent acting force be suitably set; By driving by rotation hand wheel, leading screw rotation, leading screw are threaded with screw acting force on equivalent increase and decrease steel wire, screw drives pull and push dynamometer to produce, and have eliminated the chatter producing due to swing weight-adding and have rocked; The toe of optical lever front foot is adsorbed on magnet ring, under the suction of magnetic force and the Action of Gravity Field of balancing weight, front foot stably be take the toe of two metapedes with optical lever and is rotated and the stable fine motion up and down on magnet ring of optical lever front foot as axis when steel wire is flexible, while having guaranteed plus-minus power, laser rays moves steadily, therefore, horizontal modulus of the present utility model is measured the good stability of demonstrator; The fractional increments of steel wire is after optical lever is directly amplified, the corresponding laser rays location gap on trisquare large (10-20mm) under the effect of adjacent twice equivalent pulling force, laser rays evenly elongated (about live width 0.5mm), edge is neat, direct sense data, and reading is directly perceived, accurately; Rotate optical lever, can change the position, left and right of laser rays; Rotate catoptron, can change the upper-lower position of laser rays, debug simple and convenient; Because trisquare is arc chi, reduced the systematic error of measuring, thereby improved the accuracy of measuring; Experimental principle and measuring method are consistent with experimental teaching material, facilitate student to preview and test; Experimental phenomena is intuitively remarkable, and measuring accuracy is high, not only can be used as modulus measurer, also can double as Young modulus measuring principle demonstrator, facilitates teacher ' s guidance and explanation.
Claims (2)
1. horizontal modulus is measured demonstrator, there is base, it is characterized in that: on base, be arranged in order trisquare is installed, clamp, transmitter rack, dressing table support, track, trisquare wherein, clamp, track is connected by bolt and base, transmitter rack is connected with base sliding with dressing table support, the slide block being slidably connected is housed on track, on slide block, be fixed with pull and push dynamometer, the measuring junction of pull and push dynamometer is provided with clamp, the jaw end face of clamp is connected with magnet ring magnetic force, gimbals are housed on transmitter rack, gimbals are connected with Solid State Laser transmitter, on dressing table support, be fixed with and carry dressing table, carry dressing table and be provided with through hole, carry on dressing table mirror holder is housed, catoptron is housed on mirror holder, mirror holder both sides are fixed with metapedes, metapedes is flexibly connected with a year dressing table, under mirror holder, be fixed with front foot, front foot is connected with magnet ring magnetic force below the through hole that carries dressing table, on the base of pull and push dynamometer below, leading screw is housed, leading screw is rotationally connected by bearing and base, leading screw one end is fixed with handwheel, screw is housed on leading screw, screw and pull and push dynamometer are connected.
2. horizontal modulus according to claim 1 is measured demonstrator, it is characterized in that: on base or transmitter rack, battery is housed, battery is connected with Solid State Laser transmitter by electric wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320440329.0U CN203480733U (en) | 2013-07-23 | 2013-07-23 | Horizontal modulus measurement demonstration instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320440329.0U CN203480733U (en) | 2013-07-23 | 2013-07-23 | Horizontal modulus measurement demonstration instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203480733U true CN203480733U (en) | 2014-03-12 |
Family
ID=50229021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320440329.0U Expired - Fee Related CN203480733U (en) | 2013-07-23 | 2013-07-23 | Horizontal modulus measurement demonstration instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203480733U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849138A (en) * | 2015-03-23 | 2015-08-19 | 同济大学 | Apparatus for measuring film compression modulus |
| CN114002310A (en) * | 2021-11-03 | 2022-02-01 | 江苏舒茨测控设备股份有限公司 | Paramagnetic oxygen sensor with shock resistance |
-
2013
- 2013-07-23 CN CN201320440329.0U patent/CN203480733U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849138A (en) * | 2015-03-23 | 2015-08-19 | 同济大学 | Apparatus for measuring film compression modulus |
| CN114002310A (en) * | 2021-11-03 | 2022-02-01 | 江苏舒茨测控设备股份有限公司 | Paramagnetic oxygen sensor with shock resistance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140312 Termination date: 20140723 |
|
| EXPY | Termination of patent right or utility model |