CN201811721U - Stress measurement device based on light transmitting measurement technology - Google Patents
Stress measurement device based on light transmitting measurement technology Download PDFInfo
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- CN201811721U CN201811721U CN2010205430408U CN201020543040U CN201811721U CN 201811721 U CN201811721 U CN 201811721U CN 2010205430408 U CN2010205430408 U CN 2010205430408U CN 201020543040 U CN201020543040 U CN 201020543040U CN 201811721 U CN201811721 U CN 201811721U
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- micrometer
- light transmitting
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- platform
- centering
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Abstract
The utility model provides a stress measurement device based on a light transmitting measurement technology, which is characterized by comprising a metal test bench and light transmitting digital micrometers, the metal test bench is fixed on a tester platform through a locking hole arranged at the bottom, two micrometer placing grooves are arranged at the upper part of the metal test bench, a symmetric mark is arranged between the two micrometer placing grooves, a centering groove is arranged above the symmetric mark and is coincided with a longitudinal central axis of the symmetric mark, and the light transmitting digital micrometers are arranged in the micrometer placing grooves and cling to the symmetric mark. When a sample provided with a rigid pin is added on a tester, centering is carried out on the sample through the centering groove. The utility model measures distance variation of the rigid pin in the stretching process through the light transmitting measurement technology, realizes rapid and convenient measurement on stress of small test area materials and flexible materials and under the large deformation condition, overcomes the defects of the traditional measurement methods and better makes up blind areas of a plurality of applied methods.
Description
Technical field
The utility model belongs to the strain gauge means in the mechanical field, is specially a kind of strain gauge means based on the light transmission measuring technique.
Background technology
Strain measurement method in the mechanical field mainly contains the resistance-strain method at present, uses the mechanical electronic extensometer, and adopts holographic interferometry technique or the like.But in the resistance-strain method owing to be subjected to the influence of foil gauge self area, it is often inapplicable when the less sample of surface area is measured, and foil gauge self also has intensity restriction, and when needs carry out large deformation when measuring, the resistance-strain method is often also inapplicable; And when using the mechanical electronic extensometer, need be clipped on the sample, tested surface is too little or too mostly inapplicable, and institute measure and monitor the growth of standing timber the rigidity of material must be enough greatly, otherwise material is subjected to the strain of extensometer effect generation will influence the strain of material self; Equipment is expensive in the holographic interferometry technique, and is subjected to the interference of mechanical vibration, acoustic vibration (as neighbourhood noise) and surround lighting etc. big or the like when detecting, and therefore need detect in the darkroom of quiet, cleaning, and is very high to environmental requirement.These methods all are not suitable for being applied in the quick and convenient measurement of small test area material, flexible material and the strain of large deformation situation.
The utility model content
The technical matters that solves
Be not suitable for being applied to technical matters in the quick and convenient measurement of small test area material, flexible material and the strain of large deformation situation for solving existing method, the utility model proposes a kind of strain gauge means based on the light transmission measuring technique.
Technical scheme
Described a kind of strain gauge means based on the light transmission measuring technique, it is characterized in that: comprise the saturating formula digital micrometer of metallographictest platform and light, the metallographictest platform is fixed on the testing machine platform by the hole clipping of bottom, two micrometer mounting grooves are arranged at metallographictest platform top, be symmetrical mark between two micrometer mounting grooves, there is the centering groove symmetry mark top, and the centering groove overlaps with symmetrical mark longitudinal center axis; The saturating formula digital micrometer of light is placed in the micrometer mounting groove, and is close on the symmetrical mark; When having rigidity and draw the sample of pin and be installed on the testing machine, by the centering groove with sample centering.
The preferred version of a kind of strain gauge means based on the light transmission measuring technique described in the utility model is characterized as: it is that the cylinder of even thickness draws pin that the rigidity on the sample is drawn pin, and hardness reaches 45HRC at least.
Beneficial effect
The utility model is measured rigidity by the light transmission measuring technique and is drawn the variable in distance of pin in drawing process, has realized the quick and convenient measurement to small test area material and strain of large deformation situation and stress.Overcome the defective of existing measuring method, remedied the blind area that several method is used preferably.
Description of drawings
Fig. 1: structural representation of the present utility model;
Fig. 2: metallographictest platform structural representation;
Fig. 3: testing machine platform synoptic diagram;
Fig. 4: the saturating formula digital micrometer of light measuring principle figure;
Fig. 5: the synoptic diagram of dog bone shape sample;
Wherein: 1, metallographictest platform; 2, the saturating formula digital micrometer of light; 3, sample; 4, rigidity is drawn pin; 5, testing machine platform; 6, micrometer mounting groove; 7, symmetrical mark; 8, centering groove; 9, lightening hole; 10, hole clipping; 11, testing machine platform base; 12, the testing machine platform is installed projection; 13, the saturating formula digital micrometer of light transmitting terminal; 14, the saturating formula digital micrometer of light receiving end.
Embodiment
Specify the utility model below in conjunction with embodiment:
With reference to accompanying drawing 1, accompanying drawing 2 and accompanying drawing 3, the strain gauge means based on the light transmission measuring technique of the present invention comprises metallographictest platform 1 and the saturating formula digital micrometer 2 of light, and metallographictest platform 1 is fixed on the testing machine platform 5 by the hole clipping 10 of bottom; It is symmetrical mark 7 that metallographictest platform 1 top has between 6, two micrometer mounting grooves 6 of two micrometer mounting grooves, and there is centering groove 8 symmetrical mark 7 tops, and centering groove 8 overlaps with symmetrical mark 7 longitudinal center's axis; The saturating formula digital micrometer 2 of light is placed in the micrometer mounting groove 6, and is close on the symmetrical mark 7, uses the micrometer jig that the saturating formula digital micrometer 2 of light is fixing with metallographictest platform 1; Have rigidity and draw the sample 3 of pin 4 and be installed on the testing machine, and specimen test section central axis aligns with centering groove 8, the measuring position that guarantees two saturating formula digital micrometers 2 of light equates apart from the distance of specimen test section central axis.
In the present embodiment, adopt above-mentioned strain gauge means that rectangle pure copper samples and dog bone shape pure copper samples (having provided the shape figure of dog bone form sample in the accompanying drawing 5) have been carried out strain measurement, the LS-7010 that the model of the saturating formula digital micrometer 2 of use therein light is produced for KEYENCE company, the rectangle pure copper samples is of a size of 16 * 1 * 9 (mm), and dog bone shape pure copper samples semipilot section section is of a size of 6 * 1 * 6 (mm).
At first, adopt soldering method to fix two rigidity that are parallel to each other in the test section both sides of rectangle pure copper samples and dog bone shape pure copper samples and draw pin 4, it is vertical with the central axis of specimen test section draw direction that rigidity is drawn pin, and rigidity is drawn the width of the length of pin 4 greater than the specimen test section; The rigidity of using is drawn pin 4 and is drawn pin as the column type of even thickness, and hardness reaches 45HRC.
Secondly, draw the style 3 of pin 4 and be installed on the testing machine, and specimen test section central axis aligns with centering groove 8, guarantee that the measuring position of two saturating formula digital micrometers 2 of light is equal apart from the distance of specimen test section central axis being fixed with rigidity.Adopt the saturating formula digital micrometer 2 of light measure two rigidity draw between pin apart from S
lAnd S
r, S
lBe the distance that measure measuring position, specimen test section left side, S
rThe distance of measuring for measuring position, specimen test section right side is with S
lAnd S
rMean distance S=(S
l+ S
r)/2 are as the initial length S of specimen test section.
Next, the starting characteristics test machine, tensile sample adopts the saturating formula digital micrometer 2 of light to measure two distances that rigidity is drawn 4 on pin in real time
With
With
With
Mean distance
As the length S ' of specimen test section, by formula ε '=(S-S ')/S obtain in real time the strain stress of specimen test section '.And the style strain value that will obtain in real time combines with the stress value that drawing machine provides, and draws out stress-strain diagram.
At last, when testing machine reaches the tensile force of setting, stop tensile sample, adopt the saturating formula digital micrometer 2 of light to measure two distances that rigidity is drawn 4 on pin
With
With
With
Mean distance
Final lengths S as the specimen test section ", and by formula ε "=(S-S ")/S obtain the final strain stress of specimen test section ".
Provided below under 700N and 1400N tensile force, the strain measurement measurement result of this device and adopt strain that the resistance-strain method obtains, total body strain of recording by drawing machine and the comparing result between the calculated value.Wherein owing under the 1400N tensile force, foil gauge is broken, thus there is not the resistance-strain method result under this condition, and under the 1400N tensile force, enter the plastic yield stage, there is not theoretical model yet.In addition, the total body strain that records by drawing machine is mainly used in the contrast of rectangle style, and this is that dog bone form sample is quite different because total body strain of rectangle style should be identical with local train.In addition, in theory is calculated, because dog bone shape style out-of-shape can't calculate theoretical value.
From the table the result as can be seen, to small test area and large deformation sample, traditional resistance-strain method not only has limitation very much on measurement range, the measurement result in tolerance range also exists than mistake; And that result that native system actual measurement strain obtains and theoretical value and drawing machine record total body strain is all more approaching, and measurement range is very big, but practice.
Claims (2)
1. strain gauge means based on the light transmission measuring technique, it is characterized in that: comprise the saturating formula digital micrometer of metallographictest platform and light, the metallographictest platform is fixed on the testing machine platform by the hole clipping of bottom, satisfactory to both parties micrometer mounting groove is arranged at metallographictest platform top, be symmetrical mark between two micrometer mounting grooves, there is the centering groove symmetry mark top, and the centering groove overlaps with symmetrical mark longitudinal center axis; The saturating formula digital micrometer of light is placed in the micrometer mounting groove, and is close on the symmetrical mark; When having rigidity and draw the sample of pin and be installed on the testing machine, by the centering groove with sample centering.
2. a kind of strain gauge means based on the light transmission measuring technique according to claim 1 is characterized in that: it is that the cylinder of even thickness draws pin that the rigidity on the sample is drawn pin, and hardness reaches 45HRC at least.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205430408U CN201811721U (en) | 2010-09-25 | 2010-09-25 | Stress measurement device based on light transmitting measurement technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205430408U CN201811721U (en) | 2010-09-25 | 2010-09-25 | Stress measurement device based on light transmitting measurement technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201811721U true CN201811721U (en) | 2011-04-27 |
Family
ID=43894660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205430408U Expired - Fee Related CN201811721U (en) | 2010-09-25 | 2010-09-25 | Stress measurement device based on light transmitting measurement technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201811721U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937414A (en) * | 2012-11-06 | 2013-02-20 | 昆山北极光电子科技有限公司 | Dynamic and static strain testing method |
-
2010
- 2010-09-25 CN CN2010205430408U patent/CN201811721U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937414A (en) * | 2012-11-06 | 2013-02-20 | 昆山北极光电子科技有限公司 | Dynamic and static strain testing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110427 Termination date: 20120925 |