CN205403715U - Small chi measuring device of optical lever - Google Patents

Abstract

The utility model relates to a technical field, concretely relates to small chi measuring device of optical lever are measured to the optical lever. Including the light source, be used for reflecting light source light smooth lever means, be used for showing that light lever means reflects the screen of facula, the photoelectric conversion device of being connected with the screen and the data processing device who is connected with photoelectric conversion device output, light lever means includes a tip articulated glass piece and the 2nd glass piece, the 2nd glass piece level setting and bottom coating reflectance coating. Abundant amplification prinple with the optical lever integrates with the measurement of small thickness, the great length that has shortened smooth lever means, and occupation space is little. Change the signal of telecommunication into through the fringe spacing of photoelectric conversion device on with the screen, utilize data processing device to handle, measure rapidly, and the precision is high.

Description

Optical lever miniature scale measurement apparatus

Technical field

This utility model relates to optical lever field of measuring technique, is specifically related to a kind of optical lever miniature scale measurement apparatus.

Background technology

Modern Precision Measurement Technology is the comprehensive cross discipline that a light harvesting, electronics, sensor, image, manufacture and computer technology are integrated, and relates to ambit widely, the support of its numerous related discipline of development need.In modern industry manufacturing technology and scientific research, measuring instrument utensil has precise treatment, development trend integrated, intelligentized.Length is a fundamental physical quantity, producing and being widely used in scientific experiments, needs the change of micro-displacement or thickness is accurately measured in experimentation.Optical lever amplifying method is skillfully constructed, and is a kind of common methods measuring miniature deformation.

Being illustrated in figure 1 principle of optical-lever, if the normal On0 of plane M is at horizontal level when starting, then the light that scale is sent by n0 enters telescope by plane mirror M reflection, observes the picture of n0 in telescope.When testee length changes L, after optical lever, toe changes δ L with testee length, and plane mirror M deflects an angle [alpha], and its normal also turns over an angle [alpha].Reflection law according to light, enters telescope from the n2 light sent after plane mirror reflects and is observed, it can thus be appreciated that: δ L=b (n₂-n₀)/2D, thus testee can be calculated change the value of length L.

Traditional polished rod bar amplifying method, it is desirable to space is very big, is such as utilizing polished rod bar to measure in elastic modelling quantity wiry, and observation telescope is away from the reflecting mirror distance 3-4 rice in optical lever.Therefore, optical lever method needs enough places to implement.Additionally, due to need to utilize human eye to pass through telescope observing result, it is measured is that speed is slow, and error is bigger.

Utility model content

For solving above-mentioned technical problem, this utility model provides the optical lever miniature scale measurement apparatus that a kind of measuring speed is fast, certainty of measurement is high and takes up room little.

The technical scheme is that a kind of optical lever miniature scale measurement apparatus, including light source, for the optical lever arrangement of reflection source light, for showing the photoelectric converting device that the optical screen of optical lever arrangement flare is connected and the data processing equipment being connected with photoelectric converting device outfan with optical screen, described optical lever arrangement includes the first hinged sheet glass of end and the second sheet glass, and described second sheet glass is horizontally disposed with and bottom coating reflectance coating.

Further, described first sheet glass and the second sheet glass side are fixed with the first angle measurement unit for measuring two sheet glass angles.

Further, described light source is laser instrument.

Further, described laser instrument side is fixed with the second angle measurement unit for Laser Measurement angle of incidence.

Further, described photoelectric converting device is photodetector.

The beneficial effects of the utility model: object under test is placed between two sheets by this device, make light penetrate at an angle after two glass sheet surface are reflected into, thus small thickness is transformed into spot separation, it is achieved the thickness measure of measuring targets.The measurement of the amplification principle of optical lever Yu small thickness is connected by fully, greatly shortens the length of optical lever arrangement, takes up room little.By photoelectric converting device, the fringe spacing on optical screen is changed into the signal of telecommunication, utilize data processing equipment to process, measure rapidly, and precision is high.

Accompanying drawing explanation

Fig. 1 is tradition optical lever arrangement measuring principle figure；

Fig. 2 is this utility model catenation principle block diagram；

Fig. 3 is this utility model optical lever arrangement structural representation；

Fig. 4 is the dimension calculation schematic diagram of this utility model optical lever arrangement；

In figure: 1-light source, 2-optical lever arrangement, 201-the first sheet glass, 202-the second sheet glass, 203-supports base, 3-optical screen, 4-photoelectric converting device, 5-data processing equipment.

Detailed description of the invention

Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model, rather than whole embodiments.Based on the embodiment in this utility model, all other embodiments that those of ordinary skill in the art obtain under not making creative work premise broadly fall into the scope of this utility model protection.

As in figure 2 it is shown, this utility model includes light source 1, optical lever arrangement 2, optical screen 3, photoelectric converting device 4 and data processing equipment 5.

Light source 1 in the present embodiment adopts laser instrument, photoelectric converting device 4 to adopt photodetector, data processing equipment 5 to be the chip or the computer that possess Data Analysis Services ability.Wherein, the structural representation of optical lever arrangement 2 is as it is shown on figure 3, optical lever arrangement 2 is mainly made up of the first sheet glass 201 and the second sheet glass 202.Second sheet glass 202 is horizontally disposed with and bottom is coated with reflectance coating, and the first sheet glass 201 passes through hinge in one end of the second sheet glass 202.First sheet glass 201 can close up with the second sheet glass 202, it is also possible to rotates up around hinge centres.The bottom of the second sheet glass 202 arranges support base 203, and this support base 203 is U-shaped, and the second sheet glass 202 is placed in the U-shaped groove of this support base 203.

More convenient in order to measure, an angle scale can be fixed at subtended angle place, sheet glass side and laser light incident place, so can directly read eyeglass subtended angle and angle of incidence, also angular displacement sensor it is changed to, by incoming for angular displacement signal computer, and the software of the information of process is improved simultaneously, the shape information before and after determinand of putting into received is analyzed and processes, so only with input insertion depth, just can directly calculate the length of determinand.

During measurement, first the first sheet glass 201 is opened, determinand is inserted between two sheet glass, direction of insertion and two sheet glass center of rotation keeping parallelisms.In order to make the flare of determinand be always positioned on optical screen, it is necessary to keep the subtended angle of two sheet glass to be in a preferred range.Namely when determinand thickness is less, determinand is disposed adjacent to one end of pin joint, when determinand thickness is bigger, by determinand as the one end away from pin joint.After determinand places, open laser instrument 1, make the correct position that laser beam slants at a certain angle at the first sheet glass 201 (if determinand yardstick is relatively larger, penetrate in the position away from pin joint, determinand yardstick is smaller, penetrates in the position near pin joint).Laser beam, after two sheets reflects, can form two reflection strips on optical screen.Utilizing photodetector to input data processing equipment 5 (such as computer) after this reflection strip is converted into the signal of telecommunication, data are processed by data processing equipment 5 according to setting formula, draw determinand thickness, and its Computing Principle is as shown in Figure 4.

Optical lever surveys determinand miniature scale computing formula:

Determinand thickness: h=s tan α

$tan\mathrm{\α}=\frac{-b+\sqrt{b^2-4ac}}{2a}$

$\left\{\begin{array}{c}a={\cos }^2\mathrm{\β}\·x-2\sin \mathrm{\β}\·\cos \mathrm{\β}\·s\\ b=2{\cos }^2\mathrm{\β}\·s+2\sin \mathrm{\β}\·\cos \mathrm{\β}\·x+2L\\ c=-{\cos }^2\mathrm{\β}\·x\end{array}\right.$

Wherein, x is the spacing of two reflection strips on optical screen, and s is the determinand distance according to hinged center, and L is the determinand distance from optical screen, and α is sheet glass subtended angle, and β is laser light incident angle.

The above, be only detailed description of the invention of the present utility model, it is noted that any those of ordinary skill in the art in the technical scope disclosed by this utility model, the change that can readily occur in or replacement, all should be encompassed within protection domain of the present utility model.

Claims (5)

1. an optical lever miniature scale measurement apparatus, it is characterized in that: include light source, for the optical lever arrangement of reflection source light, for showing the photoelectric converting device that the optical screen of optical lever arrangement flare is connected and the data processing equipment being connected with photoelectric converting device outfan with optical screen, described optical lever arrangement includes the first hinged sheet glass of end and the second sheet glass, and described second sheet glass is horizontally disposed with and bottom coating reflectance coating.

2. optical lever miniature scale measurement apparatus as claimed in claim 1, it is characterised in that: described first sheet glass and the second sheet glass side are fixed with the first angle measurement unit for measuring two sheet glass angles.

3. optical lever miniature scale measurement apparatus as claimed in claim 1, it is characterised in that: described light source is laser instrument.

4. optical lever miniature scale measurement apparatus as claimed in claim 3, it is characterised in that: described laser instrument side is fixed with the second angle measurement unit for Laser Measurement angle of incidence.

5. optical lever miniature scale measurement apparatus as claimed in claim 1, it is characterised in that: described photoelectric converting device is photodetector.