CN103557799A - Device for measuring transient displacement of lasers - Google Patents
Device for measuring transient displacement of lasers Download PDFInfo
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- CN103557799A CN103557799A CN201310589384.0A CN201310589384A CN103557799A CN 103557799 A CN103557799 A CN 103557799A CN 201310589384 A CN201310589384 A CN 201310589384A CN 103557799 A CN103557799 A CN 103557799A
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Abstract
In order to solve the problem that an existing contact type device for measuring displacement is low in accuracy, the invention provides a device for measuring transient displacement of lasers, and belongs to the field of laser displacement measurement. The device comprises a support, a laser emitting part, a laser receiving part and a photoelectric converter. The support comprises a base, an emitting part fixing frame and a receiving part fixing frame. The emitting part fixing frame and the receiving part fixing frame are arranged on the base in parallel and perpendicular to the base, an area for monitoring the displacement of an object to be measured is formed between the emitting part fixing frame and the receiving part fixing frame, and the base, the emitting part fixing frame and the receiving part fixing frame are integrated. The laser emitting part is arranged on the emitting part fixing frame, the laser receiving part is arranged on the receiving part fixing frame, the laser outlet side of the laser emitting part is over against the laser inlet side of the laser receiving part, parallel beams emitted by the laser emitting part are received by the laser receiving part, the optical signal output end of the laser receiving part is connected with the optical signal input end of the photoelectric converter, and the photoelectric converter outputs electric displacement signals.
Description
Technical field
The present invention relates to Laser Transient displacement measuring device, belong to laser measurement displacement field.
Background technology
The meeting that the contact type measurement system in the past adopting has causes cut and damage on the surface of detected material, and the data that measure are even not too accurate, thereby its use of occasion of often measuring at needs is restricted.In addition, contact type measurement system also can be because abrasive action causes extra maintenance cost.What therefore, the use of eyes with non-contact method test macro showed is particularly important.
At present, displacement apparatus system precision is inadequate, and trivial operations is installed huge not portablely, cannot meet user's demand.
Summary of the invention
The present invention seeks to cause cut and damage can to the surface of detected material in order to solve existing contact type measurement gearshift, cannot Measurement accuracy valid data, precision is low, the problem of trivial operations, and a kind of Laser Transient displacement measuring device is provided.
Laser Transient displacement measuring device of the present invention, it comprises bearing, laser emission section, laser pick-off portion and photoelectric commutator,
Described bearing comprises base, emission part fixed mount and acceptance division fixed mount, emission part fixed mount and acceptance division fixed mount be arranged in parallel on base, emission part fixed mount is vertical with base with acceptance division fixed mount, between emission part fixed mount and acceptance division fixed mount, be determinand displacement monitoring region, and base, emission part fixed mount and acceptance division fixed mount are integrated part;
On emission part fixed mount, be provided with laser emission section, be provided with laser pick-off portion on acceptance division fixed mount, the bright dipping side of laser emission section faces the light inlet side of laser pick-off portion,
The parallel beam of laser emission section transmitting is received by laser pick-off portion, and the light signal output end of laser pick-off portion is connected with the light signal input end of photoelectric commutator, photoelectric commutator output potential shifting signal.
Advantage of the present invention: Laser Transient displacement measuring device measuring accuracy of the present invention is high, system dynamic response is high, and the especially measurement to test specimen deformational displacement in dynamic experiment, is used very convenient, and the displacement data accuracy measuring is high, easy to carry, simple to operate easy to use, only need to connect AC220V power supply, bearing is placed in to the position that need to measure displacement, just can carry out transient Displacements measurement, cost is low, and has greatly reduced user's load.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that Laser Transient displacement measuring device line laser of the present invention forms.
Fig. 2 is the schematic three dimensional views of Laser Transient displacement measuring device of the present invention.
Fig. 3 is the three-dimensional plot of analysing and observe of Laser Transient displacement measuring device of the present invention.
Fig. 4 is the structural representation of Laser Transient displacement measuring device of the present invention.
Fig. 5 is that Laser Transient displacement measuring device of the present invention is applied to the measurement that Hopkinson bar single pole clashes into dynamic displacement.
Embodiment
Embodiment one: below in conjunction with Fig. 1 and Fig. 4, present embodiment is described, Laser Transient displacement measuring device described in present embodiment, it comprises bearing, laser emission section, laser pick-off portion and photoelectric commutator 14,
Described bearing comprises base 1, emission part fixed mount 2 and acceptance division fixed mount 3, emission part fixed mount 2 and acceptance division fixed mount 3 be arranged in parallel on base 1, emission part fixed mount 2 is vertical with base 1 with acceptance division fixed mount 3, between emission part fixed mount 2 and acceptance division fixed mount 3, be determinand displacement monitoring region, and base 1, emission part fixed mount 2 and acceptance division fixed mount 3 are integrated part;
On emission part fixed mount 2, be provided with laser emission section, be provided with laser pick-off portion on acceptance division fixed mount 3, the bright dipping side of laser emission section faces the light inlet side of laser pick-off portion,
The parallel beam of laser emission section transmitting is received by laser pick-off portion, and the light signal output end of laser pick-off portion is connected with the light signal input end of photoelectric commutator 14, photoelectric commutator 14 output potential shifting signals.
Embodiment two: below in conjunction with Fig. 1, Fig. 3 and Fig. 4, present embodiment is described, present embodiment is described further embodiment one, laser emission section comprises that emission part cylindrical sleeve 4, laser instrument 6 and emission part converge convex lens 8,
Emission part cylindrical sleeve 4 is through the end of emission part fixed mount 2, and the light inlet side ports of emission part cylindrical sleeve 4 arranges laser instrument 6, and the bright dipping side ports of emission part cylindrical sleeve 4 arranges emission part and converges convex lens 8; Laser instrument 6 is arranged on the focus place that emission part converges convex lens 8; The laser-transmitting of laser instrument 6 transmittings is crossed emission part and is converged the rear output collimated laser beam of convex lens 8.
Emission part converges convex lens 8 and by emission part lens fixed muffle 9, is fixedly installed on the bright dipping side ports of emission part cylindrical sleeve 4.Emission part lens fixed muffle 9 embeds in the bright dipping side ports of emission part cylindrical sleeve 4, and the outer round surface of emission part lens fixed muffle 9 contacts with the internal circular surfaces of the bright dipping side ports of emission part cylindrical sleeve 4, between the two, by screw, fixes.
The laser of laser instrument 6 transmitting is interior to front advancing in emission part cylindrical sleeve 4, converges convex lens 8 to the emission part of emission part cylindrical sleeve 4 bright dipping sides, and the diverging light portion of being launched exports directional light after converging convex lens 8 transmissions.
Emission part cylindrical sleeve 4 is detachably installed on emission part fixed mount 2, as shown in Figure 3.
Embodiment three: below in conjunction with Fig. 1, Fig. 3 and Fig. 4, present embodiment is described, present embodiment is described further embodiment one or two, laser pick-off portion comprises that acceptance division cylindrical sleeve 5, acceptance division converge convex lens 10 and receiver 12,
Acceptance division cylindrical sleeve 5 is through the end of acceptance division fixed mount 3, and the light inlet side ports of acceptance division cylindrical sleeve 5 arranges acceptance division and converges convex lens 10, and the bright dipping side ports of acceptance division cylindrical sleeve 5 arranges receiver 12; Receiver 12 is arranged on the focus place that acceptance division converges convex lens 10, and acceptance division converges after collimated laser beam that convex lens 10 converge convex lens 8 output by emission part converges, and is incident on the photosurface of receiver 12.
Acceptance division converges convex lens 10 and by acceptance division lens fixed muffle 11, is fixedly installed on the light inlet side ports of acceptance division cylindrical sleeve 5.Acceptance division lens fixed muffle 11 embeds in the light inlet side ports of acceptance division cylindrical sleeve 5, and the outer round surface of acceptance division lens fixed muffle 11 contacts with the internal circular surfaces of the light inlet side ports of acceptance division cylindrical sleeve 5, between the two, by screw, fixes.
Acceptance division cylindrical sleeve 5 is detachably installed on acceptance division fixed mount 3, as shown in Figure 3.
Embodiment four: present embodiment is described further embodiment one, two or three, and it also comprises oscillograph 15, the electric displacement signal output part of photoelectric commutator 14 is connected with the display input end of oscillograph 15.
Embodiment five: below in conjunction with Fig. 1 to Fig. 5, present embodiment is described, present embodiment provides a specific embodiment.
Emission part converges the focal length that convex lens 8 and acceptance division converge convex lens 10 and is 210mm, it is 170mm that emission part converges the distance that convex lens 8 and acceptance division converge between convex lens 10, the diverging light that laser instrument 6 sends is after emission part converges convex lens 8, laser forms wide 40mm after first converges convex lens, the laser rays of thick about 2mm (collimated laser beam); When this laser rays marches to the interval position of 100mm ± 20mm, form the line laser (collimated laser beam) between wide 40mm, thickness 0.3mm～0.5mm, apart from emission part, converge convex lens 8100mm ± 20mm interval between monitoring section, the variation of the logical light quantity of monitoring line laser obtain the being in the light displacement of part (or logical light part).It is 170mm that emission part converges the distance that convex lens 8 and acceptance division converge between convex lens 10, to guarantee the optimality of monitoring result.
Laser rays, after acceptance division converges convex lens 10, focuses on receiver 12, then through photoelectric commutator 14, light signal is changed into voltage signal, finally by oscillograph 15, is gathered the voltage signal of corresponding displacement.The variation of line laser length (Δ d) the just output voltage of corresponding photoelectric commutator changes (Δ U), and (Δ d) becomes highly linear relation with (Δ U).
Fig. 5 is that Laser Transient displacement measuring device is applied to the measurement that Hopkinson bar single pole clashes into dynamic displacement described in present embodiment.The variation of line laser length (Δ d) the just output voltage of corresponding photoelectric commutator changes (Δ U), and (Δ d) becomes highly linear relation with (Δ U).During experiment measuring, described in embodiment, the base 1 of Laser Transient displacement measuring device is directly placed in the end of Hopkinson bar, external AC220V power supply gets final product start bit shift measurement, projectile impact incident bar produces wave of compression pulse, wave of compression pulse is reflected into stretching wave impulse while arriving incident bar free end face, free end face starts mobile, and the oscillograph 15 of described Laser Transient displacement measuring device collects the voltage signal of corresponding displacement, as first rising edge stage in Fig. 5; When stress concentration pulse is left after free end face completely, free end face stops mobile.Stretching wave impulse is reflected into again wave of compression pulse after arriving and clashing into end, wave of compression pulse is reflected into again stretching wave impulse after arriving free end face, free end face starts again mobile, and oscillograph 15 collects the voltage signal of corresponding displacement, as second rising edge stage in Fig. 5; The time of first rising edge stage and second rising edge platform section between the stage, be exactly that first stretching ripple leaves needed time when free end time to the second, a wave of compression arrived free end face, this platform is in halted state because of free end face, do not produce displacement, so the displacement voltage signal value that oscillograph 15 collects is constant; The back and forth reflections propagate of shock wave in incident bar, makes to produce stepped platform voltage signal.
Claims (8)
1. Laser Transient displacement measuring device, is characterized in that, it comprises bearing, laser emission section, laser pick-off portion and photoelectric commutator (14),
Described bearing comprises base (1), emission part fixed mount (2) and acceptance division fixed mount (3), emission part fixed mount (2) and acceptance division fixed mount (3) be arranged in parallel on base (1), emission part fixed mount (2) is vertical with base (1) with acceptance division fixed mount (3), between emission part fixed mount (2) and acceptance division fixed mount (3), be determinand displacement monitoring region, and base (1), emission part fixed mount (2) and acceptance division fixed mount (3) are integrated part;
Emission part fixed mount is provided with laser emission section on (2), and acceptance division fixed mount is provided with laser pick-off portion on (3), and the bright dipping side of laser emission section faces the light inlet side of laser pick-off portion,
The parallel beam of laser emission section transmitting is received by laser pick-off portion, and the light signal output end of laser pick-off portion is connected with the light signal input end of photoelectric commutator (14), photoelectric commutator (14) output potential shifting signal.
2. Laser Transient displacement measuring device according to claim 1, is characterized in that, laser emission section comprises that emission part cylindrical sleeve (4), laser instrument (6) and emission part converge convex lens (8),
Emission part cylindrical sleeve (4) is through the end of emission part fixed mount (2), and the light inlet side ports of emission part cylindrical sleeve (4) arranges laser instrument (6), and the bright dipping side ports of emission part cylindrical sleeve (4) arranges emission part and converges convex lens (8); Laser instrument (6) is arranged on the focus place that emission part converges convex lens (8); The laser-transmitting of laser instrument (6) transmitting is crossed after emission part converges convex lens (8) and is exported collimated laser beam.
3. Laser Transient displacement measuring device according to claim 2, is characterized in that, laser instrument (6) is fixedly installed on the light inlet side ports of emission part cylindrical sleeve (4) by laser instrument sleeve (7).
4. Laser Transient displacement measuring device according to claim 2, is characterized in that, emission part converges convex lens (8) and by emission part lens fixed muffle (9), is fixedly installed on the bright dipping side ports of emission part cylindrical sleeve (4).
5. Laser Transient displacement measuring device according to claim 2, is characterized in that, laser pick-off portion comprises that acceptance division cylindrical sleeve (5), acceptance division converge convex lens (10) and receiver (12),
Acceptance division cylindrical sleeve (5) is through the end of acceptance division fixed mount (3), and the light inlet side ports of acceptance division cylindrical sleeve (5) arranges acceptance division and converges convex lens (10), and the bright dipping side ports of acceptance division cylindrical sleeve (5) arranges receiver (12); Receiver (12) is arranged on the focus place that acceptance division converges convex lens (10), and acceptance division converges after collimated laser beam that convex lens (10) converge convex lens (8) output by emission part converges, and is incident on the photosurface of receiver (12).
6. Laser Transient displacement measuring device according to claim 5, is characterized in that, acceptance division converges convex lens (10) and by acceptance division lens fixed muffle (11), is fixedly installed on the light inlet side ports of acceptance division cylindrical sleeve (5).
7. Laser Transient displacement measuring device according to claim 5, is characterized in that, receiver (12) is fixedly installed on the bright dipping side ports of acceptance division cylindrical sleeve (5) by receiver sleeve (13).
8. Laser Transient displacement measuring device according to claim 1, is characterized in that, it also comprises oscillograph (15), and the electric displacement signal output part of photoelectric commutator (14) is connected with the display input end of oscillograph (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310589384.0A CN103557799A (en) | 2013-11-20 | 2013-11-20 | Device for measuring transient displacement of lasers |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310589384.0A CN103557799A (en) | 2013-11-20 | 2013-11-20 | Device for measuring transient displacement of lasers |
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| CN103557799A true CN103557799A (en) | 2014-02-05 |
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| CN201310589384.0A Pending CN103557799A (en) | 2013-11-20 | 2013-11-20 | Device for measuring transient displacement of lasers |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106248063A (en) * | 2016-08-31 | 2016-12-21 | 蒋海洋 | The laser module of a kind of standardized module and Laser Line Marker |
| CN112881340A (en) * | 2021-01-12 | 2021-06-01 | 华中农业大学 | General sensing device of refraction type thin-surface laser seed flow |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1347266A2 (en) * | 2002-03-13 | 2003-09-24 | Gurny-Brösch, Andrea | Device for measuring an object |
| CN202141435U (en) * | 2010-07-08 | 2012-02-08 | 株式会社森精机制作所 | Device for measuring length of instrument |
| CN102620657A (en) * | 2012-03-30 | 2012-08-01 | 中国科学院长春光学精密机械与物理研究所 | Linear displacement measuring method and measuring device |
| CN202994096U (en) * | 2012-12-31 | 2013-06-12 | 南京林业大学 | A length automatic measuring device |
| CN203572440U (en) * | 2013-11-20 | 2014-04-30 | 哈尔滨工业大学 | Laser transient displacement measuring device |
-
2013
- 2013-11-20 CN CN201310589384.0A patent/CN103557799A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1347266A2 (en) * | 2002-03-13 | 2003-09-24 | Gurny-Brösch, Andrea | Device for measuring an object |
| CN202141435U (en) * | 2010-07-08 | 2012-02-08 | 株式会社森精机制作所 | Device for measuring length of instrument |
| CN102620657A (en) * | 2012-03-30 | 2012-08-01 | 中国科学院长春光学精密机械与物理研究所 | Linear displacement measuring method and measuring device |
| CN202994096U (en) * | 2012-12-31 | 2013-06-12 | 南京林业大学 | A length automatic measuring device |
| CN203572440U (en) * | 2013-11-20 | 2014-04-30 | 哈尔滨工业大学 | Laser transient displacement measuring device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106248063A (en) * | 2016-08-31 | 2016-12-21 | 蒋海洋 | The laser module of a kind of standardized module and Laser Line Marker |
| CN112881340A (en) * | 2021-01-12 | 2021-06-01 | 华中农业大学 | General sensing device of refraction type thin-surface laser seed flow |
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Application publication date: 20140205 |