CN205066707U - Metal material fatigue damage testing system based on hydrometer method - Google Patents
Metal material fatigue damage testing system based on hydrometer method Download PDFInfo
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- CN205066707U CN205066707U CN201520805178.3U CN201520805178U CN205066707U CN 205066707 U CN205066707 U CN 205066707U CN 201520805178 U CN201520805178 U CN 201520805178U CN 205066707 U CN205066707 U CN 205066707U
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- light intensity
- spectroscope
- fatigue damage
- laser instrument
- intensity sensor
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- Length Measuring Devices By Optical Means (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a metal material fatigue damage testing system based on hydrometer method, 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 light -intensity signal treatment circuit (9), the displacement measurement device still includes top speculum (5) bottom portable beam (10) fixed at electron -tensile tester, the vertical setting of laser instrument is in the bottom of box inner chamber, spectroscope slope 45 sets up, interferes module department to be equipped with light intensity sensor (8), and the output of light intensity sensor meets with the signal input part of light -intensity signal treatment circuit. This metal material fatigue damage testing system based on hydrometer method 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 Fatigue Damage of Metal pilot system based on hydrometer method.
Background technology
Fatigue Damage of Metal pilot system based on hydrometer method adopts electronic tensile test machine to load metal specimen, but be crucial measurement parameter 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 Fatigue Damage of Metal pilot system.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of Fatigue Damage of Metal pilot system based on hydrometer method, and this Fatigue Damage of Metal pilot system based on hydrometer method has the displacement measuring device based on laser interference, and accuracy of detection is high.
The technical solution of utility model is as follows:
Based on a Fatigue Damage of Metal pilot system for hydrometer method, 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 light intensity signal treatment 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; Spectroscope tilts 45 ° and arranges, and spectroscope is positioned on the line of top mirror and laser exit, and on the line of spectroscope also between intervention module and sidepiece catoptron, and spectroscope, intervention module are concordant in level height with sidepiece catoptron;
Intervention module place is provided with light intensity sensor (8), and the output terminal of light intensity sensor connects with the signal input part of light intensity signal treatment circuit.
Described laser instrument is the laser instrument sending red laser.
Beneficial effect:
Fatigue Damage of Metal pilot system based on hydrometer method of the present utility model, owing to adopting the displacement measuring device based on laser interference, so the deformation quantity of test specimen can be measured 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 Fatigue Damage of Metal pilot system based on hydrometer method;
Fig. 2 is the electric theory diagram of light intensity signal treatment 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-light intensity signal treatment 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 Fatigue Damage of Metal pilot system based on hydrometer method, 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 light intensity signal treatment 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; Spectroscope tilts 45 ° and arranges, and spectroscope is positioned on the line of top mirror and laser exit, and on the line of spectroscope also between intervention module and sidepiece catoptron, and spectroscope, intervention module are concordant in level height with sidepiece catoptron;
Intervention module place is provided with light intensity sensor 8, and the output terminal of light intensity sensor connects with the signal input part of light intensity signal treatment circuit.
Described laser instrument is the laser instrument sending red laser.
Red laser wavelength is 630nm.
The light beam that laser instrument sends can arrive top mirror straight up after spectroscope transmission, and after top mirror reflection, arrive intervention module again through spectroscope 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 dichroic mirror, and after the reflection of sidepiece catoptron, arrive intervention module again through spectroscope 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 light intensity signal treatment circuit, is processed, obtains change in displacement information, realize the measurement of displacement by light intensity signal treatment circuit to this signal.
Work of the present utility model: light intensity signal treatment circuit is existing mature technology to the process of light intensity signal to obtain change in displacement information.As adopt A after D converter changes into digital signal, digital signal processing (digital comparator) is identified that light intensity is the strongest or the most weak, 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.Another kind of implementation as shown in Figure 2.Principle of work for light intensity signal treatment circuit illustrates: 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, impulse meter pulse count at the output terminal of comparer, umber of pulse namely with displacement one_to_one corresponding, thus realize the measurement of displacement.
Measure the relative theory of displacement based on interference theory 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 (2)
1., based on a Fatigue Damage of Metal pilot system for hydrometer method, 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 light intensity signal treatment 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; Spectroscope tilts 45 ° and arranges, and spectroscope is positioned on the line of top mirror and laser exit, and on the line of spectroscope also between intervention module and sidepiece catoptron, and spectroscope, intervention module are concordant in level height with sidepiece catoptron;
Intervention module place is provided with light intensity sensor (8), and the output terminal of light intensity sensor connects with the signal input part of light intensity signal treatment circuit.
2. the Fatigue Damage of Metal pilot system based on hydrometer method according to claim 1, is characterized in that, described laser instrument is the laser instrument sending red laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520805178.3U CN205066707U (en) | 2015-10-16 | 2015-10-16 | Metal material fatigue damage testing system based on hydrometer method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520805178.3U CN205066707U (en) | 2015-10-16 | 2015-10-16 | Metal material fatigue damage testing system based on hydrometer method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205066707U true CN205066707U (en) | 2016-03-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520805178.3U Expired - Fee Related CN205066707U (en) | 2015-10-16 | 2015-10-16 | Metal material fatigue damage testing system based on hydrometer method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205066707U (en) |
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2015
- 2015-10-16 CN CN201520805178.3U patent/CN205066707U/en not_active Expired - Fee Related
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160302 Termination date: 20161016 |