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Optical lever measuring device

A technology of measuring devices and optical levers, applied in measuring devices, optical devices, instruments, etc., can solve problems such as unfavorable laboratory utilization efficiency, inability to observe changes in readings, inconvenient operation and readings, etc., to increase measurement sensitivity and Accuracy, small footprint, and high measurement accuracy

Active Publication Date: 2019-11-01
WEIFANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The magnification of the optical lever is proportional to the distance between the mirror and the scale. The greater the distance between the mirror and the scale, the greater the magnification of the optical lever and the higher the measurement accuracy. However, due to the limited space of the university laboratory, the general distance is also It is one to two meters, such a steel wire with a diameter of about 0.3mm, under the action of a Newton force, the final reading change on the scale is only about half a millimeter, and the measurement accuracy is not high
[0005] 2. It is inconvenient to operate and read. The Young’s modulus measuring instrument adjusts the tension parameters and observes the scale value at different positions. The experimenter needs to move back and forth at both ends, which affects the efficiency of the experiment, and cannot observe the process of the change of the reading when the tension changes.
[0006] 3. It is difficult to adjust the telescope, and it takes a long time to adjust the telescope so that the ruler presents a clear image in the telescope, and even the time to adjust the telescope is much longer than the specific measurement time
[0007] 4. It takes up a lot of laboratory space, which is not conducive to improving the utilization efficiency of the laboratory

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] like Figure 1 to Figure 3 Commonly shown, a kind of optical lever measuring device comprises base plate 1, top plate 15, laser device 2, two mirrors 3 parallel to each other, mirror 4, connecting frame 5, supporting foot 6, display screen 7 with scale and The support 8, the two reflective mirrors 3 and the display screen 7 are all arranged vertically on the bottom plate 1, the top plate 15 is arranged between the tops of the two reflective mirrors 3, and the reflective surfaces of the two reflective mirrors 3 are oppositely arranged.

[0051] The support 8 is fixedly installed on a reflector 3, and a horizontal axis 9 is arranged between the connecting frame 5 and the support 8. One end of the connecting frame 5 is fixedly connected to the reflector 4, and the other end is fixedly connected to the supporting foot 6, and the supporting foot 6 and the reflection The mirror 4 is located on both sides of the reflective mirror 3 respectively, and the reflective surface of t...

Embodiment 2

[0069] This embodiment is basically the same as Embodiment 1, the difference is that, as Figure 7 As shown, the reflective surface of the laser display position adjustment mirror 11 is a plane, and the optical path 10 between the laser display position adjustment mirror 11 and the display screen 7 is also provided with a laser inline display mirror 14, and the laser inline display mirror 14 is opposite to the laser beam. Perform horizontal widening, such as Figure 8 As shown, the laser is displayed horizontally on the display screen 7, which facilitates the reading.

[0070] Preferably, the laser inline display mirror 14 is a Powell inline lens.

Embodiment 3

[0072] This embodiment is basically the same as Embodiment 1, the difference is that, as Figure 9 As shown, the top plate 15 is provided with a guide rail 16, of course, the guide rail 16 can also be installed on the bottom plate 1, the extension direction of the guide rail 16 is consistent with the extension direction of the reflective mirror 3, and the laser display position adjustment mirror 11 is slidably installed on the guide rail 16 . In this way, the position of the laser display position adjustment mirror 11 can be changed conveniently, and the problem that the laser light path deviates from the range of the laser display position adjustment mirror 11 due to changing the laser reflection angle can be avoided.

[0073] The reflective surface of the laser display position adjustment mirror 11 is a plane, the guide rail 16 is provided with a slide block 17, an angle adjustment device 18 is provided between the laser display position adjustment mirror 11 and the slide bl...

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Abstract

The invention discloses an optical lever measuring device, and belongs to the technical field of physical experimental instruments. The optical lever measuring device comprises a bottom plate, a top plate, a laser, two mutually parallel reflecting mirrors, a reflector, a connecting frame, a supporting leg, a graduated display screen and a support; the support is fixedly mounted on one reflecting mirror, a horizontal shaft is arranged between the connecting frame and the support, one end of the connecting frame is fixedly connected with the reflector, and the other end of the connecting frame is fixedly connected with the supporting leg, when the supporting leg moves vertically, the connecting frame can rotate around the horizontal shaft; the laser is arranged close to the other reflecting mirror, and after light emitted by the laser is reflected by the reflector, an included angle of the projection of a light path of the light on the bottom plate and the projection of the reflecting mirrors on the bottom plate is an acute angle. The optical lever measuring device disclosed by the invention is convenient to operate and read, and capable of observing the process of reading changes when the length of an object is changed, high in measuring efficiency, small in occupied space, and beneficial to improving the space utilization rate of a laboratory.

Description

technical field [0001] The invention belongs to the technical field of physical experiment instruments, in particular to an optical lever measuring device. Background technique [0002] In various scientific experiments, it is often necessary to measure small changes in length. For example, measuring the Young's modulus of materials by stretching is one of the common ones. The traditional stretching method to measure the Young's modulus of metals uses the principle of optical levers. , the small elongation of the metal wire under the action of tension is amplified by the mirror light lever, and observed through the telescope and ruler placed in the distance. [0003] However, the above-mentioned optical lever measurement method has the following disadvantages: [0004] 1. The magnification of the optical lever is too small. The magnification of the optical lever is proportional to the distance between the mirror and the scale. The greater the distance between the mirror an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/02
CPCG01B11/02
Inventor 刘玉兰戴长志
Owner WEIFANG UNIVERSITY
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