CN218098103U

CN218098103U - Automatic detection device of organic glass internal stress

Info

Publication number: CN218098103U
Application number: CN202222244254.0U
Authority: CN
Inventors: 杨晓宇; 衡月昆; 陈志强; 魏存峰; 章志明; 魏龙
Original assignee: Jinan Zhongke Nuclear Technology Research Institute
Current assignee: Jinan Zhongke Nuclear Technology Research Institute
Priority date: 2022-08-25
Filing date: 2022-08-25
Publication date: 2022-12-20
Anticipated expiration: 2032-08-25

Abstract

The utility model relates to an automatic detection device of organic glass internal stress belongs to material detection device technical field, has solved current detection device and can't be applied to the detection of product on the production line and the problem that testing process is complicated. The utility model comprises a honeycomb optical base, the honeycomb optical base is used for fixing the emitting end and the receiving end of the light path system, the emitting end and the receiving end are installed along the vertical direction, wherein the emitting end is positioned at the lower side, the receiving end is positioned at the upper side, the organic glass plate is positioned between the emitting end and the receiving end, and the organic glass plate is driven by the production line to move horizontally; the emergent end is connected with the electric control optical switch through the optical fiber and then connected with the light source, and the receiving end is connected with the electric control attenuator through the optical fiber and finally connected with the spectrometer. The utility model discloses a to the automatic detection function of organic glass internal stress, integrate the degree high, control convenience, detection efficiency height.

Description

Automatic detection device of organic glass internal stress

Technical Field

The utility model relates to a material detection device technical field especially relates to an automatic detection device of organic glass internal stress.

Background

Among the factors that affect material quality and structural life, stress plays a crucial role.

The internal stress of a material refers to the stress which remains in the material and maintains self-phase equilibrium after the external action is eliminated, and is also called residual stress. Internal stresses in a material are generally classified by source into thermal stress, structural stress, and mechanical stress, and these stresses cause the material to warp or distort, generate cracks, and even cause the material to fail. The detection of the material stress can reflect the state of the material and potential problems, so that the method has very important research and application significance.

In the traditional organic glass internal stress detection, a small part of organic glass sample block needs to be cut and placed on a stress detection instrument for detection, so that the material damage is caused, the detection efficiency is reduced, and the sampling detection mode can not accurately reflect the real stress level of the material to be detected.

In addition, the existing internal stress detection instrument can only give a detection result qualitatively or semi-quantitatively, and cannot carry out quantitative detection on the internal stress of the material, and the device can realize the nondestructive and quantitative accurate detection on the internal stress of the material and has obvious advantages and value.

SUMMERY OF THE UTILITY MODEL

In view of the foregoing analysis, the utility model aims at providing an automatic detection device of organic glass internal stress for solve current detection device and can't be applied to the problem complicated to the detection and the testing process of product on the production line.

The purpose of the utility model is mainly realized through the following technical scheme:

an automatic detection device of organic glass internal stress, includes: the device comprises a honeycomb optical substrate, a receiving end, an emergent end, an electric control optical switch and an electric control optical fiber attenuator; the receiving end and the emitting end are arranged on the honeycomb optical substrate, and the sample plate to be detected is arranged between the receiving end and the emitting end; the emergent end is connected with the electric control optical switch and is used for emitting incident light; the receiving end is used for receiving the light after passing through the sample plate to be detected, the electric control optical fiber attenuator is connected with the spectrometer through one end of the optical fiber, and the other end of the optical fiber is connected with the receiving end.

Further, the exit end includes: the device comprises a first electric control turntable, a first polaroid, an optical fiber collimating lens and a light source optical fiber; the light source optical fiber is used for connecting the optical fiber collimating lens and the light source; the optical fiber collimating lens and the first polaroid are coaxially arranged, and the distance between the optical fiber collimating lens and the first polaroid is adjustable; first polaroid is installed on first automatically controlled revolving stage, and first automatically controlled revolving stage can drive first polaroid and rotate.

Further, the receiving end includes: the second electric control rotary table, the second polaroid, the attenuation sheet, the spectrometer probe and the spectrometer optical fiber; the spectrometer probe is connected with a spectrometer through a spectrometer optical fiber; an attenuation sheet is arranged between the spectrometer probe and the second polaroid, and the spectrometer probe, the second polaroid and the second polaroid are coaxially arranged; the distance between the attenuation sheet and the second polaroid is adjustable, and the second electric control rotary table can drive the second polaroid to rotate.

Further, the first electric control turntable is fixedly arranged on the honeycomb optical substrate through a first electric control turntable mounting plate; a first electric control turntable and a first coaxial mounting connecting rod are fixedly mounted on the first electric control turntable mounting plate; the first coaxial mounting connecting rod is provided with a plurality of connecting rods which are parallel to each other; a first coaxial mounting plate is slidably mounted on the first coaxial mounting connecting rod, and the optical fiber collimating lens is mounted on the first coaxial mounting plate.

Further, a second electric control turntable is fixedly arranged on the honeycomb optical substrate through a second electric control turntable mounting plate; a second electric control turntable and a second coaxial mounting connecting rod are fixedly mounted on the second electric control turntable mounting plate; the second coaxial mounting connecting rods are provided with a plurality of second coaxial mounting connecting rods which are parallel to each other; and a second coaxial mounting plate is slidably mounted on the second coaxial mounting connecting rod, and the attenuation sheet and the spectrometer probe are mounted on the second coaxial mounting plate in parallel.

Further, the first polaroid is fixedly arranged in an inner hole of the first polaroid fixing clamping ring; the first polaroid fixing clamp ring is connected with the first polaroid fixing piece through threads; the first polaroid fixing piece is fixedly installed at the rotating end of the first electric control rotary table.

Furthermore, a second polaroid is fixedly arranged in an inner hole of the second polaroid fixing clamping ring; the second polaroid fixing clamping ring is connected with the second polaroid fixing piece through threads; and the second polaroid fixing piece is fixedly arranged at the rotating end of the second electric control turntable.

Furthermore, an electric control optical switch is arranged between the optical fiber collimating lens and the light source; the electric control optical switch is used for controlling the on-off of the optical path; an electric control optical fiber attenuator is arranged between the spectrometer probe and the spectrometer; the electric control optical fiber attenuator can adjust the light intensity of light transmitted to the spectrometer by the optical fiber of the spectrometer.

Further, the honeycomb optical substrate is arranged perpendicular to the sample plate to be detected; the side surface of the honeycomb optical substrate is provided with a U-shaped notch; the emergent end and the receiving end are respectively arranged on two sides of the U-shaped notch, and the sample plate to be detected can penetrate through the U-shaped notch.

Furthermore, a first sealing shell is covered outside the receiving end; the second sealed shell covers the outer part of the emergent end; and light-passing windows are arranged on the first sealing shell and the second sealing shell.

The utility model discloses technical scheme can realize one of following effect at least:

1. the utility model comprises a honeycomb optical base, the honeycomb optical base is used for fixing the emitting end and the receiving end of the light path system, the emitting end and the receiving end are installed along the vertical direction, wherein the emitting end is positioned at the lower side, the receiving end is positioned at the upper side, a sample plate (organic glass plate) to be detected is positioned between the emitting end and the receiving end, and the sample plate is driven by the production line to move horizontally; the emergent end is connected with the electric control optical switch through an optical fiber and then connected with the light source, and the receiving end is connected with the electric control attenuator through an optical fiber and finally connected with the spectrometer; the internal stress of the sheet is calculated by spectral analysis of the light spots passing through the sheet.

2. The utility model discloses in, through the first coaxial mounting plate that slides, can adjust the distance of optic fibre collimating lens and first polaroid, and then acquire high-quality facula.

3. The utility model discloses in, through slip second coaxial arrangement board, can adjust the interval of decay piece and second polaroid, be used for adjusting the light intensity that the facula reachs suitable spectrum appearance and detects on the one hand, on the other hand can reduce the influence of environment stray light to improve the SNR that the spectrum appearance gathered the signal.

4. In the utility model, the polarization direction of the polaroid is adjusted through the electric control turntable, so that the optical path difference under different angles can be obtained, the internal stress is calculated according to the optical path difference, and the detection accuracy is improved; and the light intensity of the optical signal transmitted by the optical fiber of the spectrometer can be continuously adjusted by 0-100% through the electric control optical fiber attenuator, so that the spectrometer can accurately analyze spectral data, and the accuracy of a detection result is improved.

The utility model discloses in, can also make up each other between the above-mentioned each technical scheme to realize more preferred combination scheme. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

The drawings, in which like reference numerals refer to like parts throughout, are for the purpose of illustrating particular embodiments only and are not to be considered limiting of the invention.

Fig. 1 is a schematic structural diagram of the automatic detection device for internal stress of organic glass of the present invention;

fig. 2 is a schematic diagram of an exit end structure of the present invention;

fig. 3 is an installation schematic diagram of a first electrically controlled turntable mounting plate of the present invention;

fig. 4 is a schematic view of the optical fiber collimating lens of the present invention;

fig. 5 is a receiving end receiving schematic diagram of the present invention;

fig. 6 is a schematic view of the spectrometer probe installation of the present invention;

fig. 7 is a schematic view of the dustproof structure of the present invention;

fig. 8 is a schematic view of the optical window of the dust-proof housing of the present invention;

fig. 9 is a schematic diagram of an electrical control state control software interface of the present invention;

fig. 10 is a schematic diagram of optical path difference value fitting software according to the present invention;

fig. 11 is a schematic view of the working flow of the present invention.

Reference numerals:

1-a honeycomb optical substrate; 2-a receiving end; 3-sample plate to be detected; 4-an emergent end; 5-an electric control optical switch; 6-electrically controlled optical fiber attenuator;

101-a first electronically controlled turntable; 102-a first polarizer; 103-a first polarizer fixing clasp; 104-a first polarizer holder; 105-a first electronically controlled turntable mounting plate; 106-a first coaxial mounting plate; 107-a first coaxially mounted extension rod; 108-fiber collimating lens; 109-light source fiber; 110-positioning pins; 111-a first screw; 112-lens fixing flange;

201-a second electrically controlled turntable; 202-a second polarizer; 203-second polarizer fixing clasp; 204-a second polarizer mount; 205-a second electrically controlled turret mounting plate; 206-a second coaxial mounting plate; 207-a second coaxially mounted extension rod; 208-spectrometer fiber; 209-attenuation piece fixing clamp ring; 210-an attenuation sheet; 211-coaxial system alignment plate; 212-fiber flange;

301-a first sealed enclosure; 302-a second sealed enclosure; 303-window glass; 304-window glass fixing clasp.

Detailed Description

The following detailed description of the preferred embodiments of the invention, which is to be read in connection with the accompanying drawings, forms a part of the invention, and together with the embodiments of the invention, serve to explain the principles of the invention and not to limit the scope of the invention.

Example 1

As shown in fig. 1, the utility model discloses a concrete embodiment discloses an automatic detection device of organic glass internal stress, including honeycomb optical substrate 1, receiving terminal 2, outgoing end 4, automatically controlled photoswitch 5, automatically controlled optical fiber attenuator 6, spectrum appearance and seal housing.

Wherein the honeycomb optical substrate 1 is a carrier of the whole detection device; simultaneously, according to the production line structure, can cooperate the installation fixed with the production line.

Specifically, as shown in fig. 1, a plurality of honeycomb holes are arranged in an array on the honeycomb optical substrate 1.

Further, as shown in fig. 1, a U-shaped notch is formed on the honeycomb optical substrate 1; the emitting end 4 and the receiving end 2 are respectively arranged at two sides of the U-shaped notch, and the emitting end 4 and the receiving end 2 are symmetrically arranged.

When in use, the honeycomb optical substrate 1 is arranged perpendicular to the production line of the sample plate 3 to be detected; wait to detect sample board 3 and drive the displacement by the production line when, can pass the U-shaped notch on the honeycomb optical substrate 1, and wait to detect sample board 3 and pass the U-shaped notch when, through the utility model discloses an automatic detection device of organic glass internal stress is to waiting to detect sample board 3 and carry out the internal stress detection to producing on the line.

The utility model discloses an among the concrete implementation mode, exit end 4 includes: the device comprises a first electric control turntable 101, a first polaroid 102, a first electric control turntable mounting plate 105, a first coaxial mounting plate 106, a first coaxial mounting extension rod 107, a fiber alignment lens 108 and a lens fixing flange 112.

Specifically, the first polarizer 102 is fixedly installed on the first electronic control turntable 101, and can be driven by the first electronic control turntable 101 to rotate along its axis. In implementation, the first electric control turntable 101 drives the first polarizer 102 to rotate, and the first electric control turntable 101 realizes accurate rotation angle control of the first polarizer 102.

Further, the first electric control turntable 101 is fixedly installed on one side of the first electric control turntable installation plate 105, and four first coaxial installation connecting rods 107 are fixedly installed on the other side of the first electric control turntable installation plate 105; also, four first coaxial mounting rods 107 are parallel to each other, and first coaxial mounting plates 106 are slidably mounted on the four first coaxial mounting rods 107, as shown in fig. 2.

Specifically, the fiber alignment lens 108 is fixedly mounted on the first coaxial mounting plate 106 via a lens mounting flange 112. The first electric control turntable 101 is mounted on the first electric control turntable mounting plate 105 through screws; the first electrically controlled turret mounting plate 105 is used to connect four first coaxial connecting rods 107 to fix the first coaxial mounting plate 106, wherein the first coaxial mounting plate 106 can slide on the four first coaxial connecting rods 107 to adjust the distance between the fiber alignment lens 108 and the first polarizer 102, so as to obtain high quality light spots.

Specifically, the first electrically controlled turn table mounting plate 105 is fixed to the honeycomb optical substrate 1 by first screws 111, as shown in fig. 3. The first electrically controlled turret mounting plate 105 functions and is attached in the same manner as the second electrically controlled turret mounting plate 205. The fiber collimating lens 108 is fixed in the lens fixing flange 112 by a set screw, and the lens fixing flange 112 is fixed on the first coaxial mounting plate 106 by a set screw, as shown in fig. 4.

Furthermore, one end of the light source fiber 109 is connected to the electrically controlled optical switch 5, and the other end is connected to the fiber collimating lens 108. The electrically controlled optical switch 5 is connected to the light source. When the electric control optical switch 5 is turned on, light source light is transmitted to the optical fiber collimating lens 108 through the light source optical fiber 109, and the light source light is converged into light spots through the optical fiber collimating lens 108 and then is emitted to the sample plate 3 to be detected through the first polarizing film 102.

Further, the on and off of the light in the optical path is controlled by controlling the on and off of the electrically controlled optical switch 5.

In a specific embodiment of the present invention, the first polarizer 102 is fixedly installed in the first polarizer fixing member 104 through the first polarizer fixing snap ring 103. Specifically, the first polarizer 102 is fixedly installed in an inner hole of the first polarizer fixing snap ring 103 by interference fit; the outer side of the first polarizer fixing snap ring 103 is provided with an external thread, an internal thread is processed on the first polarizer fixing piece 104, and the first polarizer fixing piece 104 is in threaded connection and fixation with the external thread on the first polarizer fixing snap ring 103 through the internal thread. The first polarizer fixing member 104 is fixedly mounted at a moving end of the first electric control turntable 101 through a screw, and is driven by the first electric control turntable 101 to rotate along the axis of the first polarizer fixing member, so as to drive the first polarizer 102 to rotate.

Meanwhile, an alignment line is marked on the first polarizer fixing member 104, so that the initial polarization direction of the first polarizer 102 is aligned with the scale line on the first electronic control turntable 101.

Specifically, the first electrically controlled turntable mounting plate 105 is positioned with the honeycomb optical substrate 1 by two positioning pins 110, and is fixedly connected with the honeycomb optical substrate 1 by a first screw 111; thereby ensuring the concentricity of the light paths of the emergent end 4 and the receiving end 2.

The utility model discloses an among the concrete implementation, receiving terminal 2 includes: a second electrically controlled turret 201, a second polarizer 202, a second electrically controlled turret mounting plate 205, a second coaxial mounting plate 206, a second coaxial mounting extension bar 207, and an attenuation sheet 210.

The second electric control turntable mounting plate 205 is fixedly mounted on the honeycomb optical substrate 1 in the same manner as the first electric control turntable mounting plate 105.

The second polarizer 202 is fixedly mounted on the second electric control turntable 201 through the second polarizer fixing snap ring 203 and the second polarizer fixing member 204, and can be driven to rotate along the axis of the second electric control turntable 201.

Specifically, the second polarizer 202 is fixedly mounted in an inner hole of a second polarizer fixing snap ring 203 through interference fit, an outer thread is arranged on the outer side of the second polarizer fixing snap ring 203, an inner thread is arranged on the inner side of a second polarizer fixing member 204, and the second polarizer fixing snap ring 203 is fixedly connected with the second polarizer fixing member 204 through a thread. The second polarizer fixing member 204 is fixedly installed at the rotation end of the second electric control turntable 201.

The second electrically controlled turntable 201 is fixedly installed at one side of the second electrically controlled turntable installation plate 205; and four second coaxial mounting connecting rods 207 are fixedly mounted on the other side of the second electric control turntable mounting plate 205, and the four second coaxial mounting connecting rods 207 are parallel to each other. Further, a second coaxial mounting plate 206 is slidably mounted on four second coaxial mounting extension rods 207, as shown in FIG. 5.

Further, an attenuation plate 210 is fixedly mounted on the second coaxial mounting plate 206. The damping plate 210 is fixed in the second coaxial mounting plate 206 by a damping plate fixing snap ring 209. Specifically, the attenuation sheet 210 is fixedly mounted in the inner hole of the attenuation sheet fixing snap ring 209 in an interference fit manner, and the attenuation sheet fixing snap ring 209 is fixed on the second coaxial mounting plate 206.

In the present invention, the attenuation sheet 210 is used to adjust the light spot to the light intensity suitable for the spectrometer to detect, so as to prevent the spectrometer from being saturated; on the other hand, the influence of ambient stray light can be reduced, so that the signal-to-noise ratio of signals collected by the spectrometer is improved.

Further, a coaxial system alignment plate 211 is further installed on the second coaxial installation extension rod 207, and concentric ring scale lines are marked on the coaxial system alignment plate 211. The circle centers of the concentric ring scale lines are aligned with the axes of the first polarizer 102 and the second polarizer 202, and the position of a light spot projected on the coaxial system alignment plate 211 can be used for detecting whether the center of a light path is aligned with a probe of a spectrometer, so that the position of the light path system can be conveniently adjusted; and after the position adjustment is finished, taking off the coaxial system alignment plate. Specifically, the circle center of the concentric ring scale mark and the center of the spectrometer probe are positioned on the same straight line; during detection, light spots passing through the second polarizer 202 are projected onto the coaxial system alignment plate 211, when the light spots are located at the circle center of the concentric ring scale lines of the coaxial system alignment plate 211, the center of the light path is considered to be aligned with the center of the spectrometer probe, and the coaxial system alignment plate 211 is removed for detection.

Further, the spectrometer fiber optic probe is fixedly mounted within the second coaxial mounting plate 206, and is coaxial and juxtaposed with the attenuation sheet 210. Specifically, the spectrometer fiber optic probe is fixedly mounted on the fiber flange 212, and the fiber flange 212 is processed with an external thread, and is fixedly mounted by matching the external thread with an internal thread of the second coaxial mounting plate 206, as shown in fig. 6.

The electrically controlled optical fiber attenuator 6 is connected with the optical fiber probe of the spectrometer through the optical fiber 208 of the spectrometer; and the electrically controlled optical fiber attenuator 6 is connected with the spectrometer through an optical fiber. According to the specific situation in the measuring process, the electrically controlled optical fiber attenuator 6 can realize the continuous adjustment of the light intensity of the light spot received by the receiving end 2 in the range of 0-100%.

Furthermore, in order to ensure the cleanness of the optical lens and reduce the influence of dust invasion on the detection result, sealing shells are respectively added at the emergent end 4 and the receiving end 2. As shown in fig. 8, a light-transmitting window is designed on the sealed housing, the center position of the light-transmitting window corresponds to the center of the light path, a window glass 303 is mounted on the light-transmitting window, and the window glass 303 is fixedly mounted on the light-transmitting window of the sealed housing through a window glass fixing snap ring 304.

Specifically, as shown in fig. 7, the sealed housings are: the first sealed shell 301 is disposed outside the receiving end 2, and the second sealed shell 302 is disposed outside the emitting end 4.

The utility model discloses in, automatically controlled revolving stage adopts annular electric rotary table, and automatically controlled revolving stage is current part, rationally choose for use suitable model can.

During implementation, firstly, light source light is transmitted to the fiber collimating lens 108 through the light source fiber 109, and is transmitted to the first polarizer 102 through the fiber collimating lens 108, and is further transmitted to the sample plate to be detected 3 after being polarized through the first polarizer 102, the polarized light is received by the second polarizer 202 of the receiving end 2 after passing through the sample plate to be detected 3, is transmitted to the attenuation sheet 210 after being polarized through the second polarizer 202, and is then received by the spectrometer fiber probe; and finally. Is transmitted to the spectrometer through the spectrometer optical fiber 208 and the spectral data analysis is performed by the spectrometer.

In the present invention, by sliding the first coaxial mounting plate 106, the distance between the fiber collimating lens 108 and the first polarizer 102 can be adjusted, and a high-quality light spot can be obtained; by sliding the second coaxial mounting plate 206, the distance between the attenuation sheet 210 and the second polarizer 202 can be adjusted, on one hand, the distance is used for adjusting the light spot to the light intensity suitable for the spectrometer to detect, and on the other hand, the influence of ambient stray light can be reduced, so that the signal-to-noise ratio of signals collected by the spectrometer is improved.

The utility model discloses in, can carry out 0-100% continuous regulation to the light intensity of the light signal of spectrometer optic fibre 208 transmission through automatically controlled optical fiber attenuator 6 to realize the spectrum appearance and to the accurate analysis of the spectral data of light signal.

It is worth noting that:

the automatic detection device for the internal stress of the organic glass carries out spectral analysis on light rays passing through a sample plate 3 to be detected through a spectrometer, and calculates an optical path difference; and further calculating the internal stress of the sample plate 3 to be detected according to the relation between the optical path difference and the internal stress. That is to say, the utility model discloses an automatic detection device of organic glass internal stress is not directly record and waits to detect the internal stress of sample board 3, but through spectral analysis, indirect calculation obtains waiting to detect the internal stress of sample board 3.

Example 2

As shown in fig. 9, 10, and 11, the working process of the internal stress detection apparatus of the present invention is as follows:

and (3) after the sample plate 3 (organic glass plate) to be detected is produced, the sample plate enters a stress detection station, and stays for a certain time at the stress detection station for a stress detection link.

(1) The method comprises the following steps The control system controls the electric control optical switch 5 to be turned on, optical signals of the Light source enter the test system through the Light source optical fiber 109, an original point/Light 0 key in the electric control turntable control software is pressed, the first electric control turntable 101 and the second electric control turntable 201 rotate to 0-degree position, namely the polarization directions of the first polaroid 102 and the second polaroid 202 are both 0 degree, and at the moment, spectrum signals are detected through the spectrometer.

Controlling the light intensity level of the receiving end 2 through the electric control optical fiber attenuator 6 to avoid saturation of the spectrometer, and collecting spectral data at the angle and recording the spectral data as light0;

(2) the method comprises the following steps For the electrically controlled optical fiber attenuator 6, determining working parameters when the electrically controlled rotary table is at 0 angular position, wherein the working parameters are not changed in the subsequent operation link; after a Light90 key is pressed, the first electronic control turntable 101 keeps an angle unchanged, the turntable of the second electronic control turntable 201 rotates clockwise by 90 degrees, namely the polarization direction of the second polarizer 202 rotates clockwise by 90 degrees, the polarization directions of the first polarizer 102 and the second polarizer 202 are vertical at this time, and the spectrometer collects the spectral data at this time and records the spectral data as Light90;

(3) the method comprises the following steps When the GO key is pressed, the first electric control rotary table 101 and the second electric control rotary table 201 rotate by an angle alpha (the software interface indicates 10 degrees) at the same time, and the spectrometer collects corresponding spectrum data which are recorded as alpha ₁ (ii) a The GO key is pressed again, the first electric control rotary table 101 and the second electric control rotary table 201 rotate the alpha angle again at the same time, and the spectrometer collects corresponding spectrum data which are recorded as alpha ₂ (ii) a By analogy, data alpha under the angle of n alpha is recorded _n . When alpha is _n When the angle is more than or equal to 90 degrees, the two electric control turntables return to the initial angle (0 degree) after the original point/Light 0 key is pressed;

(4) the method comprises the following steps The controller controls the electric control optical switch 5 to be closed, the light intensity signal in the light path is 0 at the moment, and the spectral data collected by the spectrometer are environmental spectra and recorded as BG.

In addition, parameters such as the rotating speed, the direction, the angle, the mode and the like of the electric control turntable can be set through software, and the running state and the current position of the turntable can be displayed at the same time.

And fitting the acquired data through optical path difference data fitting program software, so as to analyze and obtain the optical path difference of o light and e light at the position of the organic glass test. Specifically, the fitting formula is:

y＝a ^{^2} *sin(pi*b/x) ^{^2}

wherein, y; spectral intensity signal, a, amplitude, b, optical path difference and x, wavelength.

For the present device, the operating wavelength is chosen to be 480-620nm. Firstly, importing spectral data under different angles, inputting a file name to be saved, and clicking a start fitting button. By sliding the b value slider, by observing R ^{^2} The fitting curve with higher fitting degree with the original data can be obtained through the numerical value change of the fitting curve and the fitting degree of the original data and the fitting data; and pressing a data storage button, and recording the best fitting parameter b value obtained at the moment, namely the best estimated value of the optical path difference.

And after recording of the best fitting parameter b values at all angles is finished, displaying data on a software interface, pressing an evaluation result button, and evaluating the fitting b values at different angles, so that the mean value and standard deviation of the best fitting parameter b values at different angles and the optical path difference fitting value vs.

According to a relation formula of stress and optical path difference: σ = δ/dc, the internal stress results of the sample plate 3 to be tested (i.e. the plexiglass) are calculated.

Wherein, sigma represents a stress value, delta represents an optical path difference (namely the mean value of b in software), d represents the thickness of the organic glass, and c represents a stress optical constant.

Compared with the prior art, the utility model provides a technical scheme has one of following beneficial effect at least:

1. in the utility model, the second polarizer 202 of the receiving end 2 and the first polarizer 102 of the emitting end 4 are both subjected to angle adjustment through the electric control turntable, so that the polarization direction of the polarizers can be continuously adjusted; and obtaining the mean value and standard deviation of the best fitting parameter b values under different angles and the optical path difference fitting value vs.

2. In the present invention, by sliding the first coaxial mounting plate 106, the distance between the fiber collimating lens 108 and the first polarizer 102 can be adjusted, so as to obtain a high-quality light spot; by sliding the second coaxial mounting plate 206, the distance between the attenuation sheet 210 and the second polarizer 202 can be adjusted, on one hand, the distance is used for adjusting the light spot to the light intensity suitable for the spectrometer to detect, and on the other hand, the influence of ambient stray light can be reduced, so that the signal-to-noise ratio of signals collected by the spectrometer is improved.

3. The utility model discloses in, can carry out 0-100% continuous adjustment to the light intensity of the light signal of spectrometer optic fibre 208 transmission through automatically controlled optical fiber attenuator 6 to realize the accurate analysis of spectrum appearance to spectral data, be favorable to improving the accuracy of testing result.

4. The utility model discloses an organic glass internal stress detection device, the spectral data's that surveys the spectrometer analysis and calculation all can go on through system controller (computer industrial computer), set up honeycomb optical substrate 1 in production line one side, make the glass plate body on the production line can pass the clearance between outgoing end 4 and the receiving terminal 2, can realize the detection to its internal stress, can be used for carrying out real-time detection to the organic glass on the production line, have good practicality.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.

Claims

1. An automatic detection device of organic glass internal stress, which is characterized by comprising: the device comprises a honeycomb optical substrate (1), a receiving end (2), an emergent end (4), an electric control optical switch (5) and an electric control optical fiber attenuator (6); the receiving end (2) and the emitting end (4) are arranged on the honeycomb optical substrate (1), and the sample plate (3) to be detected is arranged between the receiving end (2) and the emitting end (4); the emergent end (4) is connected with the electric control optical switch (5), and the emergent end (4) is used for emitting incident light; the receiving end (2) is used for receiving the light rays which penetrate through the sample plate (3) to be detected, the electric control optical fiber attenuator (6) is connected with the spectrometer through one end of the optical fiber, and the other end of the electric control optical fiber attenuator is connected with the receiving end (2).

2. Automatic detection device of internal stresses in organic glasses according to claim 1, characterized in that said exit end (4) comprises: the device comprises a first electric control rotary table (101), a first polaroid (102), a fiber collimating lens (108) and a light source fiber (109); the light source optical fiber (109) is used for connecting the optical fiber collimating lens (108) and a light source; the optical fiber collimating lens (108) and the first polaroid (102) are coaxially arranged, and the distance between the optical fiber collimating lens and the first polaroid is adjustable; the first polaroid (102) is installed on a first electric control rotary table (101), and the first electric control rotary table (101) can drive the first polaroid (102) to rotate.

3. The automatic detection device of internal stress of organic glass according to claim 2, characterized in that said receiving end (2) comprises: the spectrometer comprises a second electric control rotary table (201), a second polaroid (202), an attenuation sheet (210), a spectrometer probe and a spectrometer optical fiber (208); the spectrometer probe is connected with a spectrometer through a spectrometer optical fiber (208); an attenuation sheet (210) is arranged between the spectrometer probe and the second polaroid (202), and the three are coaxially arranged; the distance between the attenuation sheet (210) and the second polaroid (202) is adjustable, and the second electric control turntable (201) can drive the second polaroid (202) to rotate.

4. The automatic detection device of internal stress of organic glass according to claim 3, wherein the first electrically controlled turntable (101) is fixedly mounted on the honeycomb optical substrate (1) by a first electrically controlled turntable mounting plate (105); a first electric control turntable (101) and a first coaxial mounting connecting rod (107) are fixedly mounted on the first electric control turntable mounting plate (105); a plurality of first coaxial mounting connecting rods (107) are arranged and are parallel to each other; and a first coaxial mounting plate (106) is arranged on the first coaxial mounting connecting rod (107) in a sliding manner, and the optical fiber collimating lens (108) is arranged on the first coaxial mounting plate (106).

5. The automatic detection device for the internal stress of organic glass according to claim 4, wherein the second electric control turntable (201) is fixedly mounted on the honeycomb optical substrate (1) through a second electric control turntable mounting plate (205); a second electric control turntable (201) and a second coaxial mounting connecting rod (207) are fixedly mounted on the second electric control turntable mounting plate (205); the second coaxial mounting connecting rods (207) are provided with a plurality of connecting rods which are parallel to each other; and the second coaxial mounting connecting rod (207) is provided with a second coaxial mounting plate (206) in a sliding way, and the attenuation sheet (210) and the spectrometer probe are arranged on the second coaxial mounting plate (206) in parallel.

6. The automatic detection device for the internal stress of organic glass according to claim 2 or 4, wherein the first polaroid (102) is fixedly installed in an inner hole of a first polaroid fixing clamping ring (103); the first polaroid fixing clamping ring (103) is connected with the first polaroid fixing piece (104) through threads; the first polaroid fixing piece (104) is fixedly arranged at the rotating end of the first electric control rotary table (101).

7. The automatic detection device for internal stress of organic glass according to claim 3 or 5, wherein the second polarizer (202) is fixedly installed in an inner hole of a second polarizer fixing clamping ring (203); the second polaroid fixing clamping ring (203) is connected with the second polaroid fixing piece (204) through threads; the second polaroid fixing piece (204) is fixedly arranged at the rotating end of the second electric control turntable (201).

8. The automatic detection device of the internal stress of organic glass according to claim 5, characterized in that an electrically controlled optical switch (5) is arranged between the optical fiber collimating lens (108) and the light source; the electric control optical switch (5) is used for controlling the on-off of the optical path; an electric control optical fiber attenuator (6) is arranged between the spectrometer probe and the spectrometer; the electrically controlled optical fiber attenuator (6) can adjust the light intensity of the light transmitted to the spectrometer by the spectrometer optical fiber (208).

9. The automated internal stress detection device for organic glass according to claim 1, characterized in that the honeycomb optical substrate (1) is arranged perpendicular to the sample plate (3) to be detected; the side surface of the honeycomb optical substrate (1) is provided with a U-shaped notch; the emitting end (4) and the receiving end (2) are respectively arranged on two sides of the U-shaped notch, and the sample plate (3) to be detected can penetrate through the U-shaped notch.

10. The automatic detection device of internal stress of organic glass according to claim 1, characterized in that the receiving end (2) is externally covered with a first sealed housing (301); a second sealed shell (302) is covered outside the emergent end (4); and light-transmitting windows are arranged on the first sealed shell (301) and the second sealed shell (302).