An integrated laser scanning sensor for freeform surface digitization is presented. The sensor consists of a diode laser light source and four position-sensitive device (PSD) detectors. The stand-off distance of the sensor is 180 mm and the measurable range is 90 mm. The Lambert model is applied to calculate the displacement between the sensor and the measured point on the object surface along the optical axis, under the assumption of a diffusive surface. The inclination angle of the measured point from the vertical plane of the laser beam is calculated by mathematical inference. Those data are used in error compensation to improve system precision. The new design of multiple detectors could increase the measurable angle and could solve the dead space problem in single point laser of triangulation measurement. The computer simulation and actual measurements show that the displacement resolution reaches 50 μm, and the system performs well in regards to stability and repeatability. The sensor system could be mounted on the NC machine orX-Y platform for freeform surface digitization.
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Motavalli S (1998) Review of reverse engineering approaches. Comput Indus Eng 35(1–2):25–28
Song CK, Kim SW (1997) Reverse engineering: autonomous digitization of free-form surfaces on a CNC coordinate measuring machine. Int J Machine Tools Manuf 37(7):1041–1051
Shiou FJ, Lin YF, Chang KH (2003) Determination of the optimal parameters for freeform surface measurement and data processing in reverse engineering. Int J Adv Manuf Technol 21:678–690
Huang MC, Tai CC (2000) The pre-processing of data points for curve fitting in reverse engineering. Int J Adv Manuf Technol 16:635–642
Lee KH, Woo H, Suk T (2001) Data reduction methods for reverse engineering. Int J Adv Manuf Technol 17:735–743
Wang GJ, Wang CC, Chuang SHF (1999) Reverse engineering of sculptured surfaces by four-axis noncontacting scanning. Int J Adv Manuf Technol 15:800–809
Manthey DW, Knapp KN, Lee D (1994) Calibration of a laser range-finding coordinate-measuring machine. Opt Eng 33(10):3372–3380
Yau HT, Chen CY Wilhelm RG (2000) Registration and integration of multiple laser scanned data for reverse engineering of complex 3D models. Int J Prod Res 38(2):269–285
Lee KH, Park H, Son S (2001) A framework for laser scan planning of freeform surfaces. Int J Adv Manuf Technol 17:171–180
Chang DY, Chang YM (2002) A freeform surface modeling system based on laser scan data for reverse engineering. Int J Adv Manuf Technol 20:9–19
Bradley C, Chan V (2001) A complementary sensor approach to reverse engineering. Transactions of ASME, J Manuf Sci Eng 123:74–82
Smith KB, Zheng YF (2000) Point laser triangulation probe calibration for coordinate metrology. J Manuf Sci Eng 122:582–586
Saito K, Miyoshi T (1991) Noncontact 3-D digitizing system for free-form surface. Annal CIRP 483–486
Beckmann M et al (1980) Principle of optics. Pergamon, London
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Lee, S., Chang, D. A laser sensor with multiple detectors for freeform surface digitization. Int J Adv Manuf Technol 31, 1181–1190 (2007). https://doi.org/10.1007/s00170-005-0294-4
- Laser sensor
- Freeform surface digitization
- Lambert model
- Multiple detectors
- Reverse engineering