CN104280171A - Glass surface stress measuring method - Google Patents
Glass surface stress measuring method Download PDFInfo
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- CN104280171A CN104280171A CN201410605349.8A CN201410605349A CN104280171A CN 104280171 A CN104280171 A CN 104280171A CN 201410605349 A CN201410605349 A CN 201410605349A CN 104280171 A CN104280171 A CN 104280171A
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- glass
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- interference fringe
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Abstract
The invention discloses a glass surface stress measuring method. A used glass surface stress detector is high in accuracy, during measuring, errors are small, in addition, a portable electric power storage structure is used, place limiting is avoided during measuring, and measuring can be carried out when the testing surface of testing materials is slightly bent.
Description
Technical field
The present invention relates to a kind of glass fields of measurement, particularly a kind of glass surface method for measuring stress.
Background technology
Due to the singularity of production technology, in the glassware after completing, also there is internal stress more or less.In glass forming process, due to external mechanical force effect or cooling time heat uneven produced stress be called thermal stress or macro-stress.At inside glass, the stress that the micro-uneven district formed due to uneven components causes is called structural stress or microstress.Stress existing in the volume range being equivalent to unit cell dimension in glass is called ultramicroscopic view stress.Due to the architectural characteristic of glass, microcosmic wherein and ultramicroscopic view stress minimum, little on the impact of the physical strength of glass.What have the greatest impact is thermal stress in glass, because this stress is normally extremely uneven, can reduces physical strength and the thermal stability of glassware, affect the safe handling of goods, even autoclasis phenomenon can occur time serious.Therefore, in order to ensure safety when using, various glassware is all specified that the internal stress of its remnants can not exceed a certain setting.For optical glass, the existence of larger stress will have a strong impact on light transmission and image quality.Therefore, the internal stress measuring glass is a kind of means of Mass Control, particularly the product of the valuable or precision that quality requirements is higher is even more important, take place frequently due to earthquake disaster, the glazing in urban high buildings and large mansions, apartment all can use safety glass, do not have clear and definite specification about safety glass for building, former analyzer sensitivity is very low, is difficult to carry out sufficient qualitative control.
Summary of the invention
In order to overcome above-mentioned defect, the invention provides the glass surface method for measuring stress that a kind of measuring accuracy is high.
The present invention in order to the technical scheme solving its technical matters and adopt is: a kind of glass surface method for measuring stress, comprises the following steps:
1) immersion liquid provided is inserted in the air surface of glass;
2) glass is placed on top so that measuring prism (high refractive index medium) is placed on this aspect securely.Adjustment is irradiated minute surface and is exited the angle of minute surface until outlet light (interference fringe) is clearly apparent in the visual field;
3) completing necessary adjustment makes interference fringe high-visible on chock;
4) angle will be determined, the scale of reference instrument side, the corresponding standard float glass of zero-bit;
5) eyepiece is rotated until the oblique interference fringe (parallel stripes) that produces of surface stress on mother glass is parallel with two datum lines of display centre.This datum line angle (that is, the angle of interference fringe) can read from angle index plate, and interference fringe is tilted to the right, and (as in the same figure) is shown to be compression stress, is shown to be tension stress when striped is tilted to the left.
As a further improvement on the present invention, but described immersion liquid is a kind ofly have refractive index more higher than glass lower than the lower volatile liquid of high refractive index medium.
The invention has the beneficial effects as follows: the error during glass surface taseometer precision high measurement that the inventive method adopts is little, adopts portable energy storage type structure in addition, does not limit during measurement by place, the test surfaces of test material has when bending by a small margin also can be tested.
Accompanying drawing explanation
Fig. 1 is the principle schematic of measuring method of the present invention.
Embodiment
In order to deepen the understanding of the present invention, below in conjunction with embodiment and accompanying drawing, the invention will be further described, and this embodiment only for explaining the present invention, does not form limiting the scope of the present invention.
Shown below a kind of embodiment of a kind of glass surface of the present invention method for measuring stress, comprise the following steps: as shown in Figure 1, what adopt in the present embodiment is glass surface stress ga(u)ge to its principle,
An immersion liquid provided is inserted in the air surface of glass;
Glass is placed on top so that measuring prism is placed on this aspect securely.Adjustment is irradiated face, border and is exited the angle of minute surface until outlet light is clearly apparent in the visual field;
Completing necessary adjustment makes interference fringe high-visible on chock;
Determine angle, the scale of reference instrument side.The corresponding standard float glass of zero-bit;
Rotate eyepiece until the oblique interference fringe that produces of surface stress on mother glass is parallel with two datum lines of display centre.This datum line angle can read from angle index plate, and interference fringe is tilted to the right and is shown to be compression stress, is shown to be tension stress when striped is tilted to the left.
But described immersion liquid is a kind ofly have refractive index more higher than glass lower than the lower volatile liquid of high refractive index medium.
If fruit part bright dipping is seen by a compensator, quartz wedge interference fringe constantly moves to the left side or the right, and same optical path difference increases, and thus occurs at an angle.If the light path of light is propagated on surface, to hit chock be that Δ L and optical path difference be created on is wherein Δ R, then stress value can be calculated as follows:
Δ n=Δ R/Δ L=tan Φ---(formula 1)
F=C Δ n/KC---(formula 2)
F=surface stress (MPa)
C=device sensitivity constant
Δ n=optical path difference (nanometer/centimetre)
KC=photoelastic constant ((nanometer/centimetre)/MPa).
Claims (2)
1. a glass surface method for measuring stress, is characterized in that, comprises the following steps:
1) immersion liquid provided is inserted in the air surface of glass;
2) glass is placed on top so that measuring prism is placed on this aspect securely, adjustment is irradiated minute surface and is exited the angle of minute surface until outlet light is clearly apparent in the visual field;
3) completing necessary adjustment makes interference fringe high-visible on chock;
4) angle will be determined, the scale of reference instrument side, the corresponding standard float glass of zero-bit;
5) eyepiece is rotated until the oblique interference fringe that produces of surface stress on mother glass is parallel with two datum lines of display centre;
This datum line angle can read from angle index plate, and interference fringe is tilted to the right and is shown to be compression stress, is shown to be tension stress when striped is tilted to the left.
2. glass surface method for measuring stress according to claim 1, is characterized in that: but described immersion liquid is a kind ofly have refractive index more higher than glass lower than the lower volatile liquid of high refractive index medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410605349.8A CN104280171A (en) | 2014-11-03 | 2014-11-03 | Glass surface stress measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410605349.8A CN104280171A (en) | 2014-11-03 | 2014-11-03 | Glass surface stress measuring method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104280171A true CN104280171A (en) | 2015-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410605349.8A Pending CN104280171A (en) | 2014-11-03 | 2014-11-03 | Glass surface stress measuring method |
Country Status (1)
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| CN (1) | CN104280171A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107677402A (en) * | 2017-08-22 | 2018-02-09 | 洛阳兰迪玻璃机器股份有限公司 | A kind of glass plate stress online test method |
| WO2018050113A1 (en) * | 2016-09-18 | 2018-03-22 | 北京杰福科技有限公司 | Prism and glass surface stress detection device |
| CN109946001A (en) * | 2019-02-19 | 2019-06-28 | 彩虹（合肥）液晶玻璃有限公司 | Glass substrate stress category detection method, device and electronic equipment |
| US11860090B2 (en) | 2021-04-01 | 2024-01-02 | Corning Incorporated | Light source intensity control systems and methods for improved light scattering polarimetry measurements |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4353649A (en) * | 1979-07-06 | 1982-10-12 | Tokyo Shibaura Denki Kabushiki Kaisha | Apparatus for surface stress measurement of glass coating and transparent plastic product |
| US6219131B1 (en) * | 1998-06-22 | 2001-04-17 | Saint-Gobain Vitrage | Method and device for measuring stresses of membranes in a transparent material using polarization |
| CN103487181A (en) * | 2013-10-18 | 2014-01-01 | 苏州精创光学仪器有限公司 | Portable glass surface stress gauge |
| CN103528730A (en) * | 2013-10-18 | 2014-01-22 | 苏州精创光学仪器有限公司 | Microscope type glass surface stress meter |
| CN103644990A (en) * | 2013-12-13 | 2014-03-19 | 苏州精创光学仪器有限公司 | Compact glass surface stress measuring instrument |
| CN203519218U (en) * | 2013-10-18 | 2014-04-02 | 苏州精创光学仪器有限公司 | Portable glass surface stressometer |
-
2014
- 2014-11-03 CN CN201410605349.8A patent/CN104280171A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4353649A (en) * | 1979-07-06 | 1982-10-12 | Tokyo Shibaura Denki Kabushiki Kaisha | Apparatus for surface stress measurement of glass coating and transparent plastic product |
| US6219131B1 (en) * | 1998-06-22 | 2001-04-17 | Saint-Gobain Vitrage | Method and device for measuring stresses of membranes in a transparent material using polarization |
| CN103487181A (en) * | 2013-10-18 | 2014-01-01 | 苏州精创光学仪器有限公司 | Portable glass surface stress gauge |
| CN103528730A (en) * | 2013-10-18 | 2014-01-22 | 苏州精创光学仪器有限公司 | Microscope type glass surface stress meter |
| CN203519218U (en) * | 2013-10-18 | 2014-04-02 | 苏州精创光学仪器有限公司 | Portable glass surface stressometer |
| CN103644990A (en) * | 2013-12-13 | 2014-03-19 | 苏州精创光学仪器有限公司 | Compact glass surface stress measuring instrument |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018050113A1 (en) * | 2016-09-18 | 2018-03-22 | 北京杰福科技有限公司 | Prism and glass surface stress detection device |
| CN107677402A (en) * | 2017-08-22 | 2018-02-09 | 洛阳兰迪玻璃机器股份有限公司 | A kind of glass plate stress online test method |
| CN109946001A (en) * | 2019-02-19 | 2019-06-28 | 彩虹（合肥）液晶玻璃有限公司 | Glass substrate stress category detection method, device and electronic equipment |
| US11860090B2 (en) | 2021-04-01 | 2024-01-02 | Corning Incorporated | Light source intensity control systems and methods for improved light scattering polarimetry measurements |
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Application publication date: 20150114 |