CN207528670U - The device of multipath reflection laser optical lever metal linear expansion coefficient measurement - Google Patents
The device of multipath reflection laser optical lever metal linear expansion coefficient measurement Download PDFInfo
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- CN207528670U CN207528670U CN201721745877.9U CN201721745877U CN207528670U CN 207528670 U CN207528670 U CN 207528670U CN 201721745877 U CN201721745877 U CN 201721745877U CN 207528670 U CN207528670 U CN 207528670U
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- China
- Prior art keywords
- plane mirrors
- support column
- expansion coefficient
- linear expansion
- monitor station
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Abstract
The utility model proposes a kind of device and measuring method of multipath reflection laser optical lever metal linear expansion coefficient measurement, structure includes console, support column, monitor station, laser emitter, screw-thread micrometer translation stage, A plane mirrors, B plane mirrors, scale；Wherein console is located at device bottommost, and the top of console is equipped with support column, monitor station is installed at the top of support column；Screw-thread micrometer translation stage is connect by clip with support column, and top is equipped with A plane mirrors；The rear side installation laser emitter of monitor station, the fixed B plane mirrors in top, top is equipped with scale.Advantage：1）Without adjusting calibration light path repeatedly, conventional efficient is improved；2）It is few to measure physical quantity, improves experiment measurement accuracy；3）Laboratory occupied space is reduced, improves whole amplification factor number, it is easy to operate；4）With laser in place reading telescope, cost is reduced.
Description
Technical field
The utility model is the device of multipath reflection laser optical lever metal linear expansion coefficient measurement, belongs to laser measuring technique
Field.
Background technology
The feed rod rod principle that existing metal linear expansion coefficient measurement uses is as shown in Figure 1；Its amplification principle：△L=△x/N,
Its amplification factor：N=2D/b；To amplification factor N is made to reach sufficiently large sufficiently small with b very greatly it is necessary to constant D.But it is testing
Under the conditions of room, D generally takes 1.0 meters or so, and b takes 0.08 meter, and amplification factor is limited by lab space, and amplification factor is general
Twenties times can only be reached.
The technical method of existing metal linear expansion coefficient measurement has the following disadvantages：1）Optical path adjusting is complicated difficult, experiment behaviour
It is low to make efficiency, regulating time is long；2）Amplification factor is restricted, and measurement physical quantity is more, and systematic error is big；3）Reading telescope
Of high cost, experimental implementation occupied space is big.
Utility model content
The utility model proposes the device and measuring method of multipath reflection laser optical lever metal linear expansion coefficient measurement,
Its object is to solve existing laboratory magnifying glass to reduce laboratory occupied space, optical path adjusting difficult problem is solved, improves and learns
Raw conventional efficient；The measurement of physical quantity is reduced simultaneously, reduces experimental system error, improves experimental precision.
The technical solution of the utility model：The device of multipath reflection laser optical lever metal linear expansion coefficient measurement,
Structure includes console 1, support column 2, monitor station 3, laser emitter 4, screw-thread micrometer translation stage 5, A plane mirrors 6, B planes
Mirror 7, scale 8；Wherein console 1 is located at device bottommost, and the top of console 1 is equipped with cylindrical support column 2, support column 2
Top installation monitor station 3；Screw-thread micrometer translation stage 5 is connect by clip with support column 2, and top is equipped with A plane mirrors 6；
B plane mirrors 7 are fixed in the rear side installation laser emitter 4 of monitor station 3, the top of laser emitter 4, and the top of B plane mirrors 7 is equipped with
Scale 8.
The advantages of the utility model：
1）Without adjusting calibration light path repeatedly, conventional efficient is improved；
2）It is few to measure physical quantity, improves experiment measurement accuracy；
3）By two-face mirror, laboratory occupied space is reduced, improves amplification factor；
4）Amplification factor can be increased by the length for changing laser incident angle and plane mirror, it is easy to operate；
5）With laser in place reading telescope, cost is reduced.
Description of the drawings
Fig. 1 is the optical lever principle schematic that existing metal linear expansion coefficient measurement uses.
Fig. 2 is the apparatus structure schematic diagram of multipath reflection laser optical lever metal linear expansion coefficient measurement.
1 in figure is console, and 2 be support column, and 3 be monitor station, and 4 be laser emitter, and 5 be screw-thread micrometer translation
Platform, 6 be A plane mirrors, and 7 be B plane mirrors, and 8 be scale, and 9 be copper bar to be measured.
Specific embodiment
Attached drawing 2, the device of multipath reflection laser optical lever metal linear expansion coefficient measurement are compareed, structure includes console 1,
Support column 2, monitor station 3, laser emitter 4, screw-thread micrometer translation stage 5, A plane mirrors 6, B plane mirrors 7, scale 8；Wherein control
Platform 1 processed is located at device bottommost, and the top of console 1 is equipped with cylindrical support column 2, the top installation monitor station of support column 2
3；Screw-thread micrometer translation stage 5 is connect by clip with support column 2, and top is equipped with A plane mirrors 6；The rear side installation of monitor station 3
B plane mirrors 7 are fixed in laser emitter 4, the top of laser emitter 4, and the top of B plane mirrors 7 is equipped with scale 8.
The support column 2 is internally provided with heating unit, for heating the copper bar 9 to be measured placed on monitor station 3, makes it
It is heated to generate expansion；Its temperature can be shown on monitor station 3 by temperature sensor feedback.
The A plane mirrors 6 are opposite with the reflecting surface of both B plane mirrors 7 to be arranged in parallel, and is sent out convenient for laser emitter 4
Laser optical path can intuitively be reflected on scale 8.
The lower end of the A plane mirrors 6 is equipped with preceding toe and rear toe, and the end of preceding toe is placed on the center of monitor station 3,
The end of toe is placed on above screw-thread micrometer translation stage afterwards.
Its measuring method, includes the following steps：
1）Before heating measures, start laser emitter 4, adjust laser optical path, shone by A plane mirrors 6 and B plane mirrors 7
It is mapped on the scale of scale 8；A plane mirrors 6 is made to increase or reduce a micro-displacement by adjusting screw-thread micrometer translation stage 5d,
Difference of reading △ before and after recording laser is on scale simultaneouslyx, so that it is determined that amplification factorN=△x/d；
2）Copper bar 9 to be measured is set to the center of monitor station 3, the preceding toe of A plane mirrors 6 is placed on to the top of copper bar 9 to be measured
End；
3）Start the heating unit of the inside of support column 2, when copper bar 9 to be measured is by one micro-displacement of thermal change, front foot
Point drives A plane mirrors 6 to deflect a minute angle, and the laser being radiated on scale 8 accordingly generates a larger displacement amountD；Knot
Close amplification factorNIt can obtain the length l after the heating of copper bar 9 to be measuredt, pass through the calculation formula of linear expansion coefficient,
It can obtain the linear expansion coefficient α of copper bar 9 to be measured；Wherein l0The length for being copper bar 9 to be measured at 0 DEG C, is datum；T is temperature,
It can be exported by the temperature sensor of console 1；
4）Incident angle or A plane mirrors 6, the length of B plane mirrors 7 by adjusting laser emitter 4 increase light beam and exist
Order of reflection between two plane mirrors, so as to increase the amplification factor of optical leverN。
The utility model solve it is existing tradition using optical lever metal linear expansion coefficient measurement method in required instrument compared with
The problems such as more, optical path adjusting is difficult, occupied space is larger, while solve existing optical lever amplification factor and need to carry out more physics
The problem of measurement and calculating, reduce systematic error.
Claims (4)
1. the device of multipath reflection laser optical lever metal linear expansion coefficient measurement, it is characterized in that including console, support column, detection
Platform, laser emitter, screw-thread micrometer translation stage, A plane mirrors, B plane mirrors, scale；Wherein console is located at device bottommost,
The top of console is equipped with cylindrical support column, and the top of support column is equipped with monitor station；Screw-thread micrometer translation stage passes through card
Hoop is connect with support column, and top is equipped with A plane mirrors；The rear side of monitor station is equipped with laser emitter, the top of laser emitter
Fixed B plane mirrors, the top of B plane mirrors are equipped with scale.
2. the device of multipath reflection laser optical lever metal linear expansion coefficient measurement according to claim 1, which is characterized in that
The support column is internally provided with heating unit and temperature sensor.
3. the device of multipath reflection laser optical lever metal linear expansion coefficient measurement according to claim 1, which is characterized in that
The A plane mirrors are opposite with the reflecting surface of both B plane mirrors to be arranged in parallel.
4. the device of multipath reflection laser optical lever metal linear expansion coefficient measurement according to claim 1, which is characterized in that
The lower end of the A plane mirrors is equipped with preceding toe and rear toe, and the end of preceding toe is set on the center of monitor station, the end of rear toe
End is set on above screw-thread micrometer translation stage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721745877.9U CN207528670U (en) | 2017-12-14 | 2017-12-14 | The device of multipath reflection laser optical lever metal linear expansion coefficient measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721745877.9U CN207528670U (en) | 2017-12-14 | 2017-12-14 | The device of multipath reflection laser optical lever metal linear expansion coefficient measurement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207528670U true CN207528670U (en) | 2018-06-22 |
Family
ID=62578508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721745877.9U Expired - Fee Related CN207528670U (en) | 2017-12-14 | 2017-12-14 | The device of multipath reflection laser optical lever metal linear expansion coefficient measurement |
Country Status (1)
| Country | Link |
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| CN (1) | CN207528670U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107907561A (en) * | 2017-12-14 | 2018-04-13 | 南京林业大学 | The device and measuring method of multipath reflection laser optical lever metal linear expansion coefficient measurement |
-
2017
- 2017-12-14 CN CN201721745877.9U patent/CN207528670U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107907561A (en) * | 2017-12-14 | 2018-04-13 | 南京林业大学 | The device and measuring method of multipath reflection laser optical lever metal linear expansion coefficient measurement |
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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: 20180622 Termination date: 20191214 |