CN204988888U - System for be used for metal material fatigue damage test - Google Patents
System for be used for metal material fatigue damage test Download PDFInfo
- Publication number
- CN204988888U CN204988888U CN201520805221.6U CN201520805221U CN204988888U CN 204988888 U CN204988888 U CN 204988888U CN 201520805221 U CN201520805221 U CN 201520805221U CN 204988888 U CN204988888 U CN 204988888U
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- China
- Prior art keywords
- fatigue damage
- light intensity
- amplifying circuit
- comparer
- laser instrument
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Abstract
The utility model discloses a system for be used for metal material fatigue damage test, including being used for the electron -tensile tester to test piece loading load, the last displacement measurement device that is equipped with of electron -tensile tester, the displacement measurement device include box (1), be equipped with laser instrument (2), spectroscope (3), lateral part speculum (4) in the box, interfere module (7), light intensity sensor (8) and impulse detection circuit (9), the displacement measurement device still includes top speculum (5) bottom portable beam (10) fixed at electron -tensile tester, the impulse detection circuit include amplifier circuit, comparator and pulse counter, the first input end of amplifier circuit's output termination comparator, termination reference voltage, the output termination pulse counter's of comparator input is imported to the second of comparator. This system for be used for metal material fatigue damage test has the displacement measurement device based on laser Interferometer, and it is high to detect the precision.
Description
Technical field
The utility model relates to a kind of system for Fatigue Damage of Metal test.
Background technology
Fatigue Damage of Metal testing tool adopts electronic tensile test machine to load metal specimen, but be crucial measuring amount for metal specimen in the deformation of length direction, deformation quantity adopts displacement measuring device to measure, existing displacement measuring device is as very low in inductive displacement measuring instrument equally accurate, measurement requirement cannot be met, therefore, be necessary to design a kind of novel system for Fatigue Damage of Metal test.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of system for Fatigue Damage of Metal test, and this system being used for Fatigue Damage of Metal test has the displacement measuring device based on laser interference, and accuracy of detection is high.
The technical solution of utility model is as follows:
For a system for Fatigue Damage of Metal test, comprise the electronic tensile test machine for loading load to test specimen, electronic tensile test machine is provided with displacement measuring device;
Described displacement measuring device comprises casing (1), is provided with laser instrument (2), spectroscope (3), sidepiece catoptron (4), intervention module (7), light intensity sensor (8) and pulse-detecting circuit (9) in casing;
Displacement measuring device also comprises the top mirror (5) of moved cross beam (10) bottom being fixed on electronic tensile test machine;
Laser instrument is vertically arranged on the bottom of cabinets cavity; Optical splitter tilts 45 ° and arranges, and optical splitter is positioned on the line of top mirror and laser exit, and on the line of optical splitter also between intervention module and sidepiece catoptron, and optical splitter, intervention module are concordant in level height with sidepiece catoptron;
Intervention module place is provided with light intensity sensor (8);
Described pulse-detecting circuit comprises amplifying circuit, comparer and impulse meter;
The input end of the output termination amplifying circuit of light intensity sensor; The first input end of the output termination comparer of amplifying circuit; Second input termination reference voltage of comparer, the input end of the output termination impulse meter of comparer.
Described laser instrument is the laser instrument sending red laser.
Described amplifying circuit is the amplifying circuit based on operational amplifier.
Beneficial effect:
System for Fatigue Damage of Metal test of the present utility model, owing to adopting the displacement measuring device based on laser interference, so can measure the deformation quantity of test specimen exactly, precision is high, and be easy to enforcement is installed, for the fatigue damage test of metal material provides good test condition.
Accompanying drawing explanation
Fig. 1 is the general structure schematic diagram of the system for Fatigue Damage of Metal test;
Fig. 2 is the electric theory diagram of pulse-detecting circuit.
Label declaration: 1-casing, 2-laser instrument, 3-spectroscope, 4-sidepiece catoptron, 5-top mirror, 6-light path, 7-intervention module, 8-light intensity sensor, 9-pulse-detecting circuit, 10-moved cross beam.
Embodiment
Below with reference to the drawings and specific embodiments, the utility model is described in further details:
As shown in Figure 1-2, a kind of system for Fatigue Damage of Metal test, comprise the electronic tensile test machine for loading load to test specimen, electronic tensile test machine is provided with displacement measuring device;
Described displacement measuring device comprises casing 1, is provided with laser instrument 2, spectroscope 3, sidepiece catoptron 4, intervention module 7, light intensity sensor 8 and pulse-detecting circuit 9 in casing;
Displacement measuring device also comprises the top mirror 5 bottom the moved cross beam 10 being fixed on electronic tensile test machine;
Laser instrument is vertically arranged on the bottom of cabinets cavity; Optical splitter tilts 45 ° and arranges, and optical splitter is positioned on the line of top mirror and laser exit, and on the line of optical splitter also between intervention module and sidepiece catoptron, and optical splitter, intervention module are concordant in level height with sidepiece catoptron;
Intervention module place is provided with light intensity sensor 8;
Described pulse-detecting circuit comprises amplifying circuit, comparer and impulse meter;
The input end of the output termination amplifying circuit of light intensity sensor; The first input end of the output termination comparer of amplifying circuit; Second input termination reference voltage of comparer, the input end of the output termination impulse meter of comparer.
Described laser instrument is the laser instrument sending red laser.
Described amplifying circuit is the amplifying circuit based on operational amplifier.
Red laser wavelength is 630nm.
The light beam that laser instrument sends can arrive top mirror straight up after optical splitter transmission, and after top mirror reflection, arrive intervention module again through optical splitter secondary reflection, this light path is designated as S1;
The light beam that laser instrument sends can arrive sidepiece catoptron to side direction (as left side) after spectrophotometric reflection, and after the reflection of sidepiece catoptron, arrive intervention module again through optical splitter projection, this light path is designated as S2; S1 and S2 converges interference in intervention module, along with the change of, S1 distance, through interference effect, forms the different hot spot of light intensity in intervention module.Light intensity sensor detects the change of light intensity and exports electric signal to pulse-detecting circuit, is processed this signal by pulse-detecting circuit, obtains change in displacement information, realizes the measurement of displacement.
Principle of work for pulse-detecting circuit illustrates: see Fig. 2, light intensity signal u is the electric signal that light intensity sensor exports, light intensity signal compares with reference voltage Vref after amplifying circuit amplifies, if higher than Vref, then export high level, otherwise output low level, thus form pulse signal at the output terminal of comparer, impulse meter pulse count, umber of pulse namely with displacement one_to_one corresponding, thus realize the measurement of displacement.
Principle of work of the present utility model illustrates: pulse-detecting circuit is the strongest or the most weak by comparer identification light intensity, the maximum correspondence of light intensity be S1 and S2 peak swing Downward addition, the minimum correspondence of light intensity be the positive and negative counteracting of S1 and S2 peak swing.
Relative theory based on interferometry displacement is as follows: if distance difference N λ (λ is wavelength) of two row light beam S1 and S2, N is zero or positive integer, and the amplitude amount of being of actual synthesis light divides amplitude sum, and light intensity is maximum; When the path length difference of S1 and S2 is λ/2 (or odd-multiple of half-wavelength), synthesis light amplitude and be 0, now light intensity is minimum.
Claims (3)
1., for a system for Fatigue Damage of Metal test, comprise the electronic tensile test machine for loading load to test specimen, electronic tensile test machine is provided with displacement measuring device; It is characterized in that:
Described displacement measuring device comprises casing (1), is provided with laser instrument (2), spectroscope (3), sidepiece catoptron (4), intervention module (7), light intensity sensor (8) and pulse-detecting circuit (9) in casing;
Displacement measuring device also comprises the top mirror (5) of moved cross beam (10) bottom being fixed on electronic tensile test machine;
Laser instrument is vertically arranged on the bottom of cabinets cavity; Optical splitter tilts 45 ° and arranges, and optical splitter is positioned on the line of top mirror and laser exit, and on the line of optical splitter also between intervention module and sidepiece catoptron, and optical splitter, intervention module are concordant in level height with sidepiece catoptron;
Intervention module place is provided with light intensity sensor (8);
Described pulse-detecting circuit comprises amplifying circuit, comparer and impulse meter;
The input end of the output termination amplifying circuit of light intensity sensor; The first input end of the output termination comparer of amplifying circuit; Second input termination reference voltage of comparer, the input end of the output termination impulse meter of comparer.
2. the system for Fatigue Damage of Metal test according to claim 1, it is characterized in that, described laser instrument is the laser instrument sending red laser.
3. the system for Fatigue Damage of Metal test according to claim 2, it is characterized in that, described amplifying circuit is the amplifying circuit based on operational amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520805221.6U CN204988888U (en) | 2015-10-16 | 2015-10-16 | System for be used for metal material fatigue damage test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520805221.6U CN204988888U (en) | 2015-10-16 | 2015-10-16 | System for be used for metal material fatigue damage test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204988888U true CN204988888U (en) | 2016-01-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520805221.6U Expired - Fee Related CN204988888U (en) | 2015-10-16 | 2015-10-16 | System for be used for metal material fatigue damage test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204988888U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107664599A (en) * | 2017-07-03 | 2018-02-06 | 交通运输部公路科学研究所 | The method and apparatus judged for pitch tension failure |
| CN107816944A (en) * | 2017-10-26 | 2018-03-20 | 重庆华渝电气集团有限公司 | Planar laser positioning measuring device and localization method |
-
2015
- 2015-10-16 CN CN201520805221.6U patent/CN204988888U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107664599A (en) * | 2017-07-03 | 2018-02-06 | 交通运输部公路科学研究所 | The method and apparatus judged for pitch tension failure |
| CN107664599B (en) * | 2017-07-03 | 2023-10-17 | 交通运输部公路科学研究所 | Method and device for judging tensile fracture of asphalt |
| CN107816944A (en) * | 2017-10-26 | 2018-03-20 | 重庆华渝电气集团有限公司 | Planar laser positioning measuring device and localization method |
| CN107816944B (en) * | 2017-10-26 | 2019-11-08 | 重庆华渝电气集团有限公司 | Planar laser positioning measuring device and localization method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160120 Termination date: 20161016 |
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| CF01 | Termination of patent right due to non-payment of annual fee |