CN212342118U - Experimental device for measuring Young modulus of metal wire - Google Patents
Experimental device for measuring Young modulus of metal wire Download PDFInfo
- Publication number
- CN212342118U CN212342118U CN202020986243.8U CN202020986243U CN212342118U CN 212342118 U CN212342118 U CN 212342118U CN 202020986243 U CN202020986243 U CN 202020986243U CN 212342118 U CN212342118 U CN 212342118U
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- metal wire
- optical lever
- fixedly connected
- rotating shaft
- supporting plate
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- 239000002184 metal Substances 0.000 title claims abstract description 41
- 230000003287 optical effect Effects 0.000 claims abstract description 48
- 238000002474 experimental method Methods 0.000 abstract description 12
- 238000001514 detection method Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000012935 Averaging Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model discloses an experimental device for measuring Young modulus of a metal wire, which comprises a portal frame and a telescope support; the parallel connecting rod of the portal is sequentially connected with a top plate, an optical lever supporting plate and a first base; the top end of the metal wire is connected with the top plate, the middle part of the metal wire is connected with a metal wire clamping table, and the bottom end of the metal wire is connected with a weight; the front end of the optical lever is fixedly provided with a reflector, the rear end of the optical lever is fixedly provided with a rear pin, the bottom end of the reflector is fixedly provided with a rotating shaft, and the rotating shaft is rotatably connected with two ends of the optical lever supporting plate through bearings; one end of the rotating shaft is fixedly provided with a coaxial annular magnet, and the optical lever supporting plate is fixedly provided with a magnetic encoder circuit board matched with the annular magnet; the telescope support is provided with a telescope and a scale which are matched with the reflector. The utility model discloses a measure experimental apparatus of wire Young modulus has solved experiment classroom teacher and has hardly examined student's detection data accuracy, the great scheduling problem of experimental data error.
Description
Technical Field
The utility model relates to an experimental apparatus of wire Young's modulus especially relates to an experimental apparatus for measure wire Young's modulus.
Background
At present, in a physical experiment for detecting the young modulus of a metal wire, a common device is a detection device adopting an optical lever method, the device amplifies a small rotating angle of an optical lever reflector and reflects the small rotating angle into linear displacement of a scale, two front feet of an optical lever are mainly placed on a fixed platform of the experiment device, a rear foot is placed on a measuring end face of the metal wire to be measured, when the metal wire is stressed to generate small extension, the optical lever rotates around the front foot by a small angle so as to drive the optical lever reflector to rotate by a corresponding small angle, and the scale is reflected between the optical lever reflector and an adjusting reflector, so that the small angular displacement is amplified into larger linear displacement.
In physical experiments, measurement errors are a common problem, repeated detection and experiments based on the same experiment principle cannot avoid the errors, and in addition, teachers are difficult to check the accuracy of student detection data in an experiment classroom.
SUMMERY OF THE UTILITY MODEL
To the above problem, the utility model provides an experimental apparatus of comprehensive testing wire Young modulus aims at solving the lower problem of measuring error, experiment teaching efficiency in less experimentation.
The utility model discloses take following technical scheme to realize above-mentioned purpose:
an experimental device for measuring Young modulus of a metal wire comprises a portal and a telescope support; the gantry comprises parallel connecting rods, and the parallel connecting rods are sequentially connected with a top plate, an optical lever supporting plate and a first base from top to bottom; the top end of the metal wire is fixedly connected with the top plate, the middle part of the metal wire is fixedly connected with a metal wire clamping table, and the bottom end of the metal wire is fixedly connected with a weight; the optical lever supporting plate is connected with the parallel connecting rods in a sliding mode and locked through a first screw, and a through hole for accommodating the metal wire clamping table to slide vertically is formed in the optical lever supporting plate; the front end of the optical lever is fixedly connected with a reflector, the rear end of the optical lever is fixedly connected with a rear pin, and the bottom end of the reflector is fixedly connected with a rotating shaft; a first fixing seat and a second fixing seat are fixedly arranged at two ends of the optical lever supporting plate respectively, and bearings matched with the rotating shaft are arranged on the first fixing seat and the second fixing seat respectively; one end of the rotating shaft is fixedly connected with an annular magnet coaxial with the rotating shaft; the optical lever supporting plate is also fixedly connected with a magnetic encoder bracket, one end of the magnetic encoder bracket, which is opposite to the annular magnet, is provided with a magnetic encoder circuit board matched with the annular magnet, and the other end of the magnetic encoder bracket is provided with a reading display screen; the telescope support is sequentially connected with a scale matched with the reflector, a telescope and a second base for leveling, and the telescope is slidably connected with the telescope support and locked through a second screw.
In the technical scheme, firstly, the Young modulus of the metal wire can be measured and calculated by adopting the optical lever principle; secondly, the experimental device replaces the front foot of the existing optical lever with a rotating shaft, detects the rotating angle of the rotating shaft through a magnetic encoder, calculates the stretching amount of the metal wire by utilizing the trigonometric function relation, and finally calculates the Young modulus of the metal wire. In the experimental class, a teacher can verify the accuracy of the detection data of students by adopting the second method, and in addition, the two methods can be combined for averaging to reduce the data error of the experiment.
The utility model has the advantages that:
the utility model discloses an improve experimental apparatus, realize utilizing traditional optical lever to measure young's modulus, can utilize magnetic encoder to measure and calculate young's modulus simultaneously again, can verify the accuracy that the student detected the data in the classroom on the one hand, on the other hand can combine two kinds of methods to ask the average to reduce the data error of experiment.
Drawings
FIG. 1 is a diagram: measure experimental apparatus's of wire Young's modulus structure chart.
FIG. 2 is a diagram of: measure experimental apparatus's of wire Young modulus portal structure chart.
FIG. 3A is a graph of: the structure of the ring magnet.
FIG. 3B is a diagram: the structure chart of the magnetic encoder circuit board.
In the figure: 1. a gantry; 11. parallel connecting rods; 12. a top plate; 13. an optical lever support plate; 131. a first fixed seat; 132. a second fixed seat; 130. a through hole; 14. a first base; 2. a metal wire; 21. a weight; 22. a wire clamping table; 3. a magnetic encoder support; 31. a magnetic encoder circuit board; 310. a Hall angle sensor chip; 4. a telescope support; 41. a scale; 42. a telescope; 43. a second base; 5. an optical lever; 50. a reflective mirror; 51. a rotating shaft; 510. a ring magnet; 52. a rear foot.
Detailed Description
As shown in fig. 1 to 3, the present embodiment provides an experimental apparatus for measuring young's modulus of a metal wire, comprising a gantry 1, a telescope support 4; the gantry 1 comprises a parallel connecting rod 11, a top plate 12, an optical lever supporting plate 13 and a first base 14 are sequentially connected to the parallel connecting rod 11, the top end of a metal wire 2 to be tested is connected with the top plate 12, the bottom end of the metal wire is connected with a weight 21, and the middle of the metal wire is connected with a metal wire clamping table 22;
the connection mode is that the parallel connecting rod 11 is sequentially connected with a top plate 12, an optical lever supporting plate 13 and a first base 14 from top to bottom, and the optical lever supporting plate 13 is provided with a through hole 130 for accommodating the metal wire clamping table 22; the top end of the metal wire 4 is fixedly connected with the top plate 12 through a first fixing clamp, the middle part of the metal wire is fixedly connected with a metal wire clamping table 22 through a second fixing clamp, the bottom end of the metal wire is fixedly connected with a weight 21 through a rigid piece, and the rigid piece is a steel hook; the optical lever support plate 13 is slidably connected with the parallel connecting rod 11 and locked by a first screw, the optical lever support plate 13 is provided with a through hole 130 for accommodating the metal wire clamping table 22 to slide vertically, the front end of the optical lever 5 is fixedly connected with a reflective mirror 50 and the rear end of the optical lever 5 is fixedly connected with a rear pin 52, the lower end of the reflective mirror 50 is fixedly connected with a rotating shaft 51, wherein the rear end of the optical lever 5 is placed on the metal wire clamping table 22 by the rear pin 52, the front end of the optical lever is rotatably connected with the optical lever support plate 13 by the rotating shaft 51, specifically, the two ends of the optical lever support plate 13 are respectively provided with a first fixed seat 131 and a second fixed seat 132, the first fixed seat 131 and the second fixed seat 132 are respectively provided with holes coaxial with the rotating shaft 51, the two ends of the rotating shaft 51 are respectively rotatably connected with the first fixed seat 131 and the second fixed seat 132 by bearings, and a first, A second bearing is arranged between the outer ring at the other end of the rotating shaft 51 and the inner ring of the hole of the second fixing seat 132, so that the metal wire 2 is stretched to drive the rear foot 52 to move downwards, namely, the reflective mirror 50 is driven to rotate along the rotating shaft 51; the rotating shaft 51 is positioned at one end of the second fixed seat 132, protrudes out of the second fixed seat 132, and is provided with a coaxial annular magnet 510 at the end part, the optical lever supporting plate 13 is also fixedly connected with a magnetic encoder support 3, one end of the magnetic encoder support 3 opposite to the annular magnet 510 is provided with a magnetic encoder circuit board 31 matched with the annular magnet 510, and the other end is provided with a reading display screen, in the embodiment, the magnetic encoder circuit board 31 adopts an iC-MA3 Hall angle sensor chip 310 produced by the German integrated circuit manufacturer iC-Haus company, the chip can output the Sin/Cos value of a rotating angle and is shown on the reading display screen, and the detection precision is 15 arc seconds; the telescope support 4 is sequentially connected with a scale 41, a telescope 42 and a second base 43 for leveling, wherein the scale 41 is matched with the reflector 50, and the telescope 42 is slidably connected with the telescope support 4 and locked by a second screw;
the experimental principle and process of the optical lever are the prior art, and are not described herein again; the distance between the telescope support 2, the laser support 3 and the gantry 1 can be adjusted according to the actual experimental environment, the scale range and the like, and is not limited herein; the principle of the experimental device of the embodiment is as follows:
in the experimental device of the embodiment, the rotation angle of the reflective mirror 50 caused by the stretching of the metal wire 2 can be accurately detected through the matching of the magnetic encoder circuit board 31 and the annular magnet 510, the length of the optical lever 5 can be obtained through measurement, and the stretching length of the metal wire 2 is calculated by utilizing a trigonometric function, so that the young modulus is calculated; meanwhile, the Young modulus can be measured and calculated through the telescope 42 and the scale 41; therefore, on one hand, on the experimental classroom, a teacher can verify the accuracy of the data measured by the student optical lever method through the measurement of the rotation angle, and on the other hand, the two methods can be combined to average to reduce the data error of the experiment.
In the above embodiment, the optical lever 5 and the mirror 50, the mirror 50 and the shaft 51, and the like may be fixedly connected by gluing, welding, or the like.
The utility model discloses a measure experimental apparatus of wire young modulus through improving original experimental apparatus, realizes utilizing traditional optical lever to measure young modulus, can utilize magnetic encoder to measure and calculate young modulus simultaneously again, can verify the accuracy that the student detected the data in the classroom on the one hand, and on the other hand can combine two kinds of methods to ask the data error that averages and reduce the experiment.
Claims (1)
1. An experimental device for measuring Young modulus of a metal wire comprises a portal and a telescope support; the gantry comprises parallel connecting rods, and the parallel connecting rods are sequentially connected with a top plate, an optical lever supporting plate and a first base from top to bottom;
the top end of the metal wire is fixedly connected with the top plate, the middle part of the metal wire is fixedly connected with a metal wire clamping table, and the bottom end of the metal wire is fixedly connected with a weight;
the optical lever supporting plate is connected with the parallel connecting rods in a sliding mode and locked through a first screw, and a through hole for accommodating the metal wire clamping table to slide vertically is formed in the optical lever supporting plate;
the optical lever is characterized in that a reflector is fixedly connected to the front end of the optical lever, a rear pin is fixedly connected to the rear end of the optical lever, and a rotating shaft is fixedly connected to the bottom end of the reflector; a first fixing seat and a second fixing seat are fixedly arranged at two ends of the optical lever supporting plate respectively, and bearings matched with the rotating shaft are arranged on the first fixing seat and the second fixing seat respectively; one end of the rotating shaft is fixedly connected with an annular magnet coaxial with the rotating shaft; the optical lever supporting plate is also fixedly connected with a magnetic encoder bracket, one end of the magnetic encoder bracket, which is opposite to the annular magnet, is provided with a magnetic encoder circuit board matched with the annular magnet, and the other end of the magnetic encoder bracket is provided with a reading display screen;
the telescope support is sequentially connected with a scale matched with the reflector, a telescope and a second base for leveling, and the telescope is slidably connected with the telescope support and locked through a second screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020986243.8U CN212342118U (en) | 2020-06-02 | 2020-06-02 | Experimental device for measuring Young modulus of metal wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020986243.8U CN212342118U (en) | 2020-06-02 | 2020-06-02 | Experimental device for measuring Young modulus of metal wire |
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| Publication Number | Publication Date |
|---|---|
| CN212342118U true CN212342118U (en) | 2021-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020986243.8U Expired - Fee Related CN212342118U (en) | 2020-06-02 | 2020-06-02 | Experimental device for measuring Young modulus of metal wire |
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| CN (1) | CN212342118U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114842713A (en) * | 2022-05-17 | 2022-08-02 | 浙江科技学院 | A Remote Digital Young's Modulus Device |
| CN115452552A (en) * | 2022-08-29 | 2022-12-09 | 济南大学 | Improved method for measuring Young modulus by optical lever method |
-
2020
- 2020-06-02 CN CN202020986243.8U patent/CN212342118U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114842713A (en) * | 2022-05-17 | 2022-08-02 | 浙江科技学院 | A Remote Digital Young's Modulus Device |
| CN114842713B (en) * | 2022-05-17 | 2024-05-10 | 浙江科技学院 | Remote digital Young modulus device |
| CN115452552A (en) * | 2022-08-29 | 2022-12-09 | 济南大学 | Improved method for measuring Young modulus by optical lever method |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210112 |