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Laser-self-mixing interferometry for mechatronics applications.

Ottonelli S, Dabbicco M, De Lucia F, di Vietro M, Scamarcio G - Sensors (Basel) (2009)

Bottom Line: We report on the development of an all-interferometric optomechatronic sensor for the detection of multi-degrees-of-freedom displacements of a remote target.The prototype system exploits the self-mixing technique and consists only of a laser head, equipped with six laser sources, and a suitably designed reflective target.The feasibility of the system was validated experimentally for both single or multi-degrees-of-freedom measurements, thus demonstrating a simple and inexpensive alternative to costly and bulky existing systems.

View Article: PubMed Central - PubMed

Affiliation: Dipartimento Interateneo di Fisica "M. Merlin", Università di Bari, and CNR-INFM Laboratorio Regionale "LIT3", Via Amendola 173, I-70126, Bari, Italy; E-Mails: dabbicco@fisica.uniba.it ; delucia@fisica.uniba.it ; divietro@fisica.uniba.it ; scamarcio@fisica.uniba.it.

ABSTRACT
We report on the development of an all-interferometric optomechatronic sensor for the detection of multi-degrees-of-freedom displacements of a remote target. The prototype system exploits the self-mixing technique and consists only of a laser head, equipped with six laser sources, and a suitably designed reflective target. The feasibility of the system was validated experimentally for both single or multi-degrees-of-freedom measurements, thus demonstrating a simple and inexpensive alternative to costly and bulky existing systems.

No MeSH data available.


(a) Measured longitudinal displacement Δx as a function of purely linear displacement ΔxAPI measured by the reference system. Negative (positive) values refers to backward (forward) motion with respect to the laser source. (b) Measured yaw (hollow symbols) and pitch (full symbols) rotations as a function of the rotation angle measured by the reference system at a fixed target distance of 120 cm. The vertical error bars are within the symbol size, and the best fit lines, represented by continuous lines, have equations Δx = 0.99999 ΔxAPI - 0.00002 (R2 = 1) and Δϑy/z = 0.9945Δϑy/z,API + 0.0006 (R2 = 0.9999), respectively.
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f7-sensors-09-03527: (a) Measured longitudinal displacement Δx as a function of purely linear displacement ΔxAPI measured by the reference system. Negative (positive) values refers to backward (forward) motion with respect to the laser source. (b) Measured yaw (hollow symbols) and pitch (full symbols) rotations as a function of the rotation angle measured by the reference system at a fixed target distance of 120 cm. The vertical error bars are within the symbol size, and the best fit lines, represented by continuous lines, have equations Δx = 0.99999 ΔxAPI - 0.00002 (R2 = 1) and Δϑy/z = 0.9945Δϑy/z,API + 0.0006 (R2 = 0.9999), respectively.

Mentions: Figure 7 shows the measured linear displacement Δx [Figure 7(a)] and rotations [Figure 7(b)] as compared with the reference values simultaneously measured by the API system. The system response is linear over a longitudinal dynamic range of six orders of magnitude and an angular dynamic range of three orders of magnitude. The maximum continuous linear and angular displacements were only limited by the length of the linear stage and the reference standards.


Laser-self-mixing interferometry for mechatronics applications.

Ottonelli S, Dabbicco M, De Lucia F, di Vietro M, Scamarcio G - Sensors (Basel) (2009)

(a) Measured longitudinal displacement Δx as a function of purely linear displacement ΔxAPI measured by the reference system. Negative (positive) values refers to backward (forward) motion with respect to the laser source. (b) Measured yaw (hollow symbols) and pitch (full symbols) rotations as a function of the rotation angle measured by the reference system at a fixed target distance of 120 cm. The vertical error bars are within the symbol size, and the best fit lines, represented by continuous lines, have equations Δx = 0.99999 ΔxAPI - 0.00002 (R2 = 1) and Δϑy/z = 0.9945Δϑy/z,API + 0.0006 (R2 = 0.9999), respectively.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3297133&req=5

f7-sensors-09-03527: (a) Measured longitudinal displacement Δx as a function of purely linear displacement ΔxAPI measured by the reference system. Negative (positive) values refers to backward (forward) motion with respect to the laser source. (b) Measured yaw (hollow symbols) and pitch (full symbols) rotations as a function of the rotation angle measured by the reference system at a fixed target distance of 120 cm. The vertical error bars are within the symbol size, and the best fit lines, represented by continuous lines, have equations Δx = 0.99999 ΔxAPI - 0.00002 (R2 = 1) and Δϑy/z = 0.9945Δϑy/z,API + 0.0006 (R2 = 0.9999), respectively.
Mentions: Figure 7 shows the measured linear displacement Δx [Figure 7(a)] and rotations [Figure 7(b)] as compared with the reference values simultaneously measured by the API system. The system response is linear over a longitudinal dynamic range of six orders of magnitude and an angular dynamic range of three orders of magnitude. The maximum continuous linear and angular displacements were only limited by the length of the linear stage and the reference standards.

Bottom Line: We report on the development of an all-interferometric optomechatronic sensor for the detection of multi-degrees-of-freedom displacements of a remote target.The prototype system exploits the self-mixing technique and consists only of a laser head, equipped with six laser sources, and a suitably designed reflective target.The feasibility of the system was validated experimentally for both single or multi-degrees-of-freedom measurements, thus demonstrating a simple and inexpensive alternative to costly and bulky existing systems.

View Article: PubMed Central - PubMed

Affiliation: Dipartimento Interateneo di Fisica "M. Merlin", Università di Bari, and CNR-INFM Laboratorio Regionale "LIT3", Via Amendola 173, I-70126, Bari, Italy; E-Mails: dabbicco@fisica.uniba.it ; delucia@fisica.uniba.it ; divietro@fisica.uniba.it ; scamarcio@fisica.uniba.it.

ABSTRACT
We report on the development of an all-interferometric optomechatronic sensor for the detection of multi-degrees-of-freedom displacements of a remote target. The prototype system exploits the self-mixing technique and consists only of a laser head, equipped with six laser sources, and a suitably designed reflective target. The feasibility of the system was validated experimentally for both single or multi-degrees-of-freedom measurements, thus demonstrating a simple and inexpensive alternative to costly and bulky existing systems.

No MeSH data available.