CN107796545B - Polarized light non-contact toughened glass surface stress measuring device and measuring method - Google Patents
Polarized light non-contact toughened glass surface stress measuring device and measuring method Download PDFInfo
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- CN107796545B CN107796545B CN201711119591.4A CN201711119591A CN107796545B CN 107796545 B CN107796545 B CN 107796545B CN 201711119591 A CN201711119591 A CN 201711119591A CN 107796545 B CN107796545 B CN 107796545B
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- 239000005341 toughened glass Substances 0.000 title claims abstract description 87
- 238000000034 method Methods 0.000 title claims description 18
- 238000012360 testing method Methods 0.000 claims abstract description 109
- 238000004458 analytical method Methods 0.000 claims abstract description 10
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000004134 energy conservation Methods 0.000 abstract 1
- 238000005265 energy consumption Methods 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 abstract 1
- 239000011521 glass Substances 0.000 description 9
- 238000000278 gas antisolvent technique Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 230000003287 optical effect Effects 0.000 description 2
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- 238000006243 chemical reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0047—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes measuring forces due to residual stresses
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Abstract
The utility model provides a polarized light non-contact toughened glass surface stress measuring device, including computer and frame, the upper surface of frame is the horizontality, and the left side at frame top is fixed with the mounting bracket perpendicularly, and the right side at frame top sets up the mount along left and right directions slip, is fixed with omnipotent angle chi and facula analysis appearance on the mounting bracket, and wherein the square of omnipotent angle chi extends to the right and sets up, is fixed with laser emitter on the square, and laser emitter slope sets up and laser emitter's emission port sets up downwards, and laser emitter's emission port is fixed with the polarizer; the invention is easy to use, the function obtained by the early test is stored in the database, and the stress test result can be obtained by directly inputting the test data during the later test. The invention has the advantages of lower energy consumption, energy conservation, environmental protection and production and measurement cost reduction when in use.
Description
Technical Field
The invention belongs to the technical field of glass stress detection, and particularly relates to a polarized light non-contact toughened glass surface stress measuring device and a stress measuring method.
Background
China is one of the largest glass production countries in the world, and the yield of tempered glass in China in 2017, 1-8 months, is 3.83 hundred million square meters, and is increased by 6.8% in a same ratio. The surface stress of glass is not only an indicator of the strength of glass, but is also the most important safety feature. The detection of the surface stress is an important and indispensable element both in the production phase and in the use phase of the glass.
Currently, the mainstream stress tester is a contact type, that is, a GASP stress tester, also called glancing angle surface stress meter, which is a portable optical instrument used for detecting the surface stress of glass products. GASP strain gauges are based on a photoelastic measurement principle, scaled by light passing through the glass surface. The operator drops a drop of test solvent onto the glass to ensure optical contact. The GASP stress meter was placed on a liquid and the light passing through the prism formed a critical angle with the glass surface. An angle-dependent crosshair was also observed through the eyepiece of the GASP stress meter. And reading the angle, and referring to a random angle stress conversion table, namely converting the stress value, wherein the larger the angle is, the larger the stress value is.
However, such stress testers have certain limitations, which are reflected in several aspects: firstly, the limitation of the test condition, namely that the GASP stress meter needs to be placed on the surface of toughened glass (contact is guaranteed) to perform the test, and the test cannot be performed when the contact cannot be guaranteed; secondly, the limitation of the test result is read, the GASP stress tester needs manual reading, and measurement errors are likely to be generated during manual reading, so that the test result is influenced; thirdly, the limitation of test time, when the GASP stress tester is used for measuring the surface stress of the toughened glass, the operations of dripping, placing the instrument on the surface of the toughened glass, manually reading, converting the stress value and the like are needed, and the operations are all needed to be completed in a certain time (when the manual operation is in error, the time is needed to be spent again).
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a polarized light non-contact type toughened glass surface stress measuring device and a stress measuring method which are non-contact, accurate in test and convenient to operate.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a polarized light non-contact toughened glass surface stress measuring device, which comprises a computer and a frame, the upper surface of frame is the horizontality, the left side vertical fixation at frame top has the mounting bracket, the right side at frame top sets up the mount along controlling the direction slip, be fixed with omnipotent angle chi and facula analysis appearance on the mounting bracket, wherein the square of omnipotent angle chi extends to the right side and sets up, be fixed with laser emitter on the square, laser emitter slope setting and laser emitter's emission port set up downwards, laser emitter's emission port is fixed with the polarizer, be fixed with the facula receiving screen on the mount, the computer pass through the data line and be connected with the data port of light board analysis appearance.
The front side of the frame is provided with scales along the left-right direction.
A method for measuring stress by using a polarized light non-contact toughened glass surface stress measuring device comprises the following steps:
(1) Preparing n pieces of toughened glass for test and one piece of toughened glass to be tested, wherein the surface stress of the n pieces of toughened glass for test is sigma respectively 1 、σ 2 、σ 3 、σ 4 、σ 5 ……σ n Wherein sigma 1 、σ 2 、σ 3 、σ 4 、σ 5 ……σ n Is of a known value and sigma 2 -σ 1 =σ 3 -σ 2 =……σ n -σ n-1 The surface stress of the toughened glass to be tested is unknown;
(2) Measuring n pieces of toughened glass for test under the conditions of different angles theta and the same L value to obtain test data, wherein theta is an angle value on a universal angle ruler, and L is the horizontal distance between a reflection point of laser on the toughened surface and a fixing frame;
(3) Analysis of test data: according to the measured test data under the condition of different angle theta values, a function curve is made, and the origin data analysis software is utilized to carry out fitting analysis on the function curve, so as to obtain the function relation between the surface stress sigma of the toughened glass and the light spot position S (x, y)；
(4) Fitting the analyzed functional relation between the surface stress sigma of the toughened glass and the spot position S (x, y) under different angles thetaStoring the data into a computer, sorting all the analyzed data, and establishing a database;
(5) Testing the surface stress of the toughened glass to be tested, and adjusting the horizontal distance between the facula receiving screen and the reflection point of the laser on the toughened surface to be L x Introducing a scaling factor k=l/L x The function is adjusted toBy utilizing the function relation between the surface stress sigma of the toughened glass and the spot position S (x, y)>And testing the toughened glass to be tested, and inputting the data obtained by the test into a computer to obtain the surface stress of the toughened glass to be tested.
The method for measuring n pieces of toughened glass for test under the condition of different angles theta to obtain test data comprises the following steps:
selecting θ 1 、θ 2 ……θ m M angle values in total are taken as measured angle values, and θ 2 -θ 1 =θ 3 -θ 2 =……θ m -θ m-1 Sequentially selecting the angle value theta 1 、θ 2 ……θ m And respectively testing n pieces of toughened glass for test to obtain test data.
When the angle value on the universal angle ruler is theta 1 And sequentially testing the n pieces of toughened glass for test by using a stress data testing method to obtain test data: alpha 1 =（A 1 、A 2 、A 3 、……A n ）。
The stress data testing method specifically comprises the following steps:
(a) The surface stress is sigma 1 The toughened glass for the test is horizontally arranged on the upper surface of the rack;
(b) Rotating an angle adjusting knob on the universal angle gauge to an angle theta 1 At the moment, the horizontal distance between the light spot receiving screen and the laser at the reflecting point of the surface of the toughened glass is L 1 ；
(c) Taking down the polarizer, opening the laser transmitter and the light spot analyzer, reflecting light rays emitted by the laser transmitter onto the light spot receiving screen through the surface of the toughened glass, analyzing the light spot position on the light spot receiving screen by the light spot analyzer, transmitting the light spot position to a computer through a data line, and recording the light rays to the light spot position S of the light spot receiving screen through the surface of the toughened glass for the test by the computer 1 （x 1 ,y 1 ) Closing the laser emitter and the light spot analyzer;
(d) Assembling the polarizer on the laser transmitter again, opening the laser transmitter and the light spot analyzer, and recording the light beam to the light spot position S of the light spot receiving screen by the computer after the light beam passes through the surface of the toughened glass for test 1 '(x 1 ',y 1 '), closing the laser emitter and the light spot analyzer;
(e) Will surface stress sigma 1 Angle theta 1 Spot position S 1 （x 1 ,y 1 ) Spot position S 1 '(x 1 ',y 1 ' and horizontal distance L 1 Recorded as test data A 1 ；
(g) At theta 1 、L 1 Test surface stress sigma under unchanged condition 2 The tempered glass for test of (a) and (e) having a surface stress of sigma according to the operation method of steps (a) - (e) 2 Tempered glass for test of (1), and recording spot position S 2 （x 2 ,y 2 ) And S is 2 '(x 2 ',y 2 '), surface stress sigma 2 Angle theta 1 Spot position S 2 （x 2 ,y 2 ) Spot position S 2 '(x 2 ',y 2 ' and horizontal distance L 1 Recorded as test data A 2 ；
(h) According to steps (a) - (e), at θ 1 、L 1 The rest of the tempered glass for test was tested in order under unchanged conditions (i.e. surface stress was sigma 3 、σ 4 、σ 5 ……σ n Tempered glass for test of (2), and test data A were recorded 3 、A 4 、A 5 ……A n To obtain alpha 1 =（A 1 、A 2 、A 3 、……A n ）。
By adopting the technical scheme, the invention has the following beneficial effects: compared with the prior art, the invention has the advantages that the testing method is unique and different from the photoelastic testing method of GASP, and a new set of testing method for the surface stress of the toughened glass is innovated. The invention is easy to use, the function obtained by the early test is stored in the database, and the stress test result can be obtained by directly inputting test data during the later test.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
As shown in fig. 1, the polarized light non-contact toughened glass surface stress measuring device comprises a computer 1 and a rack 2, wherein the upper surface of the rack 2 is in a horizontal state, a mounting frame 3 is vertically fixed on the left side of the top of the rack 2, a fixing frame 4 is slidably arranged on the right side of the top of the rack 2 along the left-right direction, a universal angle ruler 5 and a light spot analyzer 6 are fixed on the mounting frame 3, the right angle ruler of the universal angle ruler 5 is extended rightwards, a laser emitter 7 is fixed on the right angle ruler, the laser emitter 7 is obliquely arranged, the emission port of the laser emitter 7 is downwards arranged, a polarizer 8 is fixed on the emission port of the laser emitter 7, a light spot receiving screen 9 is fixed on the fixing frame 4, and the computer 1 is connected with the data port of the light spot analyzer through a data line. The front side of the frame 2 is provided with scales 10 along the left-right direction.
The method for measuring the stress by using the polarized light non-contact toughened glass surface stress measuring device comprises the following steps:
(1) 120 pieces of toughened glass for test and one piece of toughened glass to be tested are prepared, wherein the surface stress of the 120 pieces of toughened glass for test is sigma respectively 1 、σ 2 、……σ 120 Wherein sigma 1 、σ 2 、……σ 120 Is of a known value and sigma 2 -σ 1 =σ 3 -σ 2 =……σ 120 -σ 119 The surface stress of the toughened glass to be tested is unknown;
(2) Measuring 120 pieces of toughened glass for test under the conditions of different angles theta and the same L value to obtain test data, wherein theta is an angle value on a universal angle ruler 5, and L is a horizontal distance between a light spot receiving screen and a fixing frame;
(3) Analysis of test data: according to the measured test data under the condition of different angle theta values, a function curve is made, and the origin data analysis software is utilized to carry out fitting analysis on the function curve, so as to obtain the function relation between the surface stress sigma of the toughened glass and the light spot position S (x, y)；
(4) Fitting the analyzed functional relation between the surface stress sigma of the toughened glass and the spot position S (x, y) under different angles thetaStoring the data into a computer 1, sorting all the analyzed data, and establishing a database;
(5) Testing the surface stress of the toughened glass to be tested, and adjusting the horizontal distance between the facula receiving screen and the reflection point of the laser on the toughened surface to be L x Introducing a scaling factor k=l/L x The function is adjusted toBy utilizing the function relation between the surface stress sigma of the toughened glass and the spot position S (x, y)>And testing the toughened glass to be tested, and inputting the data obtained by the test into a computer to obtain the surface stress of the toughened glass to be tested.
120 pieces of tempered glass for test are measured under the condition of different angles theta, and the method for obtaining test data comprises the following steps: selecting θ 1 、θ 2 ……θ 6 A total of 6 angle values as measured angle values, and θ 2 -θ 1 =θ 3 -θ 2 =……θ 6 -θ 5 Sequentially selecting the angle value theta 1 、θ 2 ……θ 6 And testing 120 pieces of tempered glass for test respectively to obtain test data.
When the angle value on the universal angle ruler 5 is theta 1 And then, sequentially testing 120 pieces of toughened glass for test by using a stress data testing method to obtain test data: alpha 1 =（A 1 、A 2 、A 3 、……A 120 ），β 1 =（B 1 、B 2 、B 3 ……B 120 ），γ 1 =（C 1 、C 2 、C 3 ……C 120 ）。
The stress data testing method specifically comprises the following steps:
(a) The surface stress is sigma 1 The toughened glass for the test is horizontally arranged on the upper surface of the frame 2;
(b) Rotating the angle adjusting knob on the universal angle gauge 5 to an angle theta 1 At the moment, the horizontal distance between the facula receiving screen 9 and the reflection point of the laser on the surface of the toughened glass is L 1 ；
(c) Taking down the polarizer 8, opening the laser transmitter 7 and the spot analyzer 6, reflecting light emitted by the laser transmitter 7 onto the spot receiving screen 9 through the surface of the toughened glass, analyzing the spot position on the spot receiving screen 9 by the spot analyzer 6, transmitting the spot position to the computer 1 through a data line by the spot analyzer 6, and recording the light reflected by the surface of the toughened glass for test through the computer 1Spot position S to spot receiving screen 9 1 （x 1 ,y 1 ) The laser transmitter 7 and the light spot analyzer 6 are turned off;
(d) The polarizer 8 is assembled on the laser transmitter 7 again, the laser transmitter 7 and the spot analyzer 6 are opened, and the computer 1 records the spot position S of the light reflected to the spot receiving screen 9 by the surface of the toughened glass for test 1 '(x 1 ',y 1 '), the laser transmitter 7 and the spot analyzer 6 are turned off;
(e) Will surface stress sigma 1 Angle theta 1 Spot position S 1 （x 1 ,y 1 ) Spot position S 1 '(x 1 ',y 1 ' and horizontal distance L 1 Recorded as test data A 1 ；
(g) At theta 1 、L 1 Test surface stress sigma under unchanged condition 2 The tempered glass for test of (a) and (e) having a surface stress of sigma according to the operation method of steps (a) - (e) 2 Tempered glass for test of (1), and recording spot position S 2 （x 2 ,y 2 ) And S is 2 '(x 2 ',y 2 '), surface stress sigma 2 Angle theta 1 Spot position S 2 （x 2 ,y 2 ) Spot position S 2 '(x 2 ',y 2 ' and horizontal distance L 1 Recorded as test data A 2 ；
(h) According to steps (a) - (e), at θ 1 、L 1 The rest of the tempered glass for test was tested in order under unchanged conditions (i.e. surface stress was sigma 3 、σ 4 、……σ 120 Tempered glass for test of (2), and test data A were recorded 3 、A 4 、……A 120 To obtain alpha 1 =（A 1 、A 2 、A 3 、……A 120 ）；
The present embodiment is not limited in any way by the shape, material, structure, etc. of the present invention, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present invention are all included in the scope of protection of the technical solution of the present invention.
Claims (3)
1. A method for measuring stress by using a polarized light non-contact toughened glass surface stress measuring device is characterized by comprising the following steps: the polarized light non-contact toughened glass surface stress measuring device comprises a computer and a rack, wherein the upper surface of the rack is in a horizontal state, a mounting frame is vertically fixed on the left side of the top of the rack, a fixing frame is arranged on the right side of the top of the rack in a sliding manner along the left-right direction, a universal angle ruler and a light spot analyzer are fixed on the mounting frame, a right angle ruler of the universal angle ruler extends rightwards and is fixedly provided with a laser emitter, the laser emitter is obliquely arranged, the emission port of the laser emitter is downwards arranged, the emission port of the laser emitter is fixedly provided with a polarizer, a light spot receiving screen is fixed on the fixing frame, and the computer is connected with a data port of the light spot analyzer through a data wire;
the front side of the frame is provided with scales along the left-right direction;
the method comprises the following steps:
(1) Preparing n pieces of toughened glass for test and one piece of toughened glass to be tested, wherein the surface stress of the n pieces of toughened glass for test is sigma respectively 1 、σ 2 、σ 3 、σ 4 、σ 5 ……σ n Wherein sigma 1 、σ 2 、σ 3 、σ 4 、σ 5 ……σ n Is of a known value and sigma 2 -σ 1 ＝σ 3 -σ 2 ＝……σ n -σ n-1 The surface stress of the toughened glass to be tested is unknown;
(2) Measuring n pieces of toughened glass for test under the conditions of different angles theta and the same L value to obtain test data, wherein theta is an angle value on a universal angle ruler, and L is the horizontal distance between a reflection point of laser on the toughened surface and a fixing frame;
(3) Analysis of test data: according to the test data measured under the condition of different angle theta values, a function curve is manufactured, and the function curve is subjected to fitting analysis by utilizing origin data analysis software, so that a function relation sigma=f (x, y) between the surface stress sigma of the toughened glass and the spot position S (x, y) is obtained;
(4) Storing the function relation sigma=f (x, y) of the toughened glass surface stress sigma and the spot position S (x, y) which are subjected to fitting analysis under different angles theta into a computer, finishing all the analyzed data, and establishing a database;
(5) Testing the surface stress of the toughened glass to be tested, and adjusting the horizontal distance between the facula receiving screen and the reflection point of the laser on the toughened surface to be L x Introducing a scaling factor k=l/L x And (3) adjusting the function to sigma=kf (x, y), testing the toughened glass to be tested by utilizing the function relation sigma=kf (x, y) between the surface stress sigma of the toughened glass and the spot position S (x, y), and inputting the data obtained by the test into a computer to obtain the surface stress of the toughened glass to be tested.
2. The method for measuring the stress of the polarized light non-contact toughened glass surface stress measuring device according to claim 1, wherein the method comprises the following steps: the method for measuring n pieces of toughened glass for test under the condition of different angles theta to obtain test data comprises the following steps:
selecting θ 1 、θ 2 ……θ m M angle values in total are taken as measured angle values, and θ 2 -θ 1 ＝θ 3 -θ 2 ＝……θ m -θ m-1 Sequentially selecting the angle value theta 1 、θ 2 ……θ m And respectively testing n pieces of toughened glass for test to obtain test data.
3. The method for measuring the stress of the polarized light non-contact toughened glass surface stress measuring device as claimed in claim 2, wherein the method comprises the following steps:
when the angle value on the universal angle ruler is theta 1 And sequentially testing the n pieces of toughened glass for test by using a stress data testing method to obtain test data: alpha 1 ＝(A 1 、A 2 、A 3 、……A n )；
The stress data testing method specifically comprises the following steps:
(a) The surface stress is sigma 1 The toughened glass for the test is horizontally arranged on the upper surface of the rack;
(b) Rotating an angle adjusting knob on the universal angle gauge to an angle theta 1 At the moment, the horizontal distance between the light spot receiving screen and the laser at the reflecting point of the surface of the toughened glass is L 1 ；
(c) Taking down the polarizer, opening the laser transmitter and the light spot analyzer, reflecting light rays emitted by the laser transmitter onto the light spot receiving screen through the surface of the toughened glass, analyzing the light spot position on the light spot receiving screen by the light spot analyzer, transmitting the light spot position to a computer through a data line, and recording the light rays to the light spot position S of the light spot receiving screen through the surface of the toughened glass for the test by the computer 1 (x 1 ,y 1 ) Closing the laser emitter and the light spot analyzer;
(d) Assembling the polarizer on the laser transmitter again, opening the laser transmitter and the light spot analyzer, and recording the light beam to the light spot position S of the light spot receiving screen by the computer after the light beam passes through the surface of the toughened glass for test 1 '(x 1 ',y 1 '), closing the laser emitter and the light spot analyzer;
(e) Will surface stress sigma 1 Angle theta 1 Spot position S 1 (x 1 ,y 1 ) Spot position S 1 '(x 1 ',y 1 ' and horizontal distance L 1 Recorded as test data A 1 ；
(g) At theta 1 、L 1 Test surface stress sigma under unchanged condition 2 The tempered glass for test of (a) and (e) having a surface stress of sigma according to the operation method of steps (a) - (e) 2 Tempered glass for test of (1), and recording spot position S 2 (x 2 ,y 2 ) And S is 2 '(x 2 ',y 2 '), surface stress sigma 2 Angle theta 1 Spot position S 2 (x 2 ,y 2 ) Spot position S 2 '(x 2 ',y 2 ' and horizontal distance L 1 Recorded as test data A 2 ；
(h) According to steps (a) - (e), at θ 1 、L 1 The rest of the tempered glass for test was tested in order under unchanged conditions, i.e. the surface stress was sigma 3 、σ 4 、σ 5 ……σ n Tempered glass for test of (1), record test data A 3 、A 4 、A 5 ……A n To obtain alpha 1 ＝(A 1 、A 2 、A 3 、……A n )。
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| CN207502086U (en) * | 2017-11-14 | 2018-06-15 | 河南理工大学 | The contactless tempered glass surface stress measurement device of polarised light |
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2017
- 2017-11-14 CN CN201711119591.4A patent/CN107796545B/en active Active
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| CN101592537A (en) * | 2009-07-10 | 2009-12-02 | 成都光明光电股份有限公司 | Stress of optical glass device and measuring method thereof |
| CN105466613A (en) * | 2015-11-27 | 2016-04-06 | 苏州精创光学仪器有限公司 | Tempered glass surface stress detection device |
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