A fast self-calibration method of line laser sensors for on-machine measurement of honeycomb cores

Qin, Yan; Kang, Ren Ke; Sun, Jiansong; Wang, Yidan; Zhu, Xianglong; Dong, Zhigang

doi:10.1016/j.optlaseng.2022.106981

Cited by 10 publications

(4 citation statements)

References 22 publications

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“…They evaluated the wear state of the slider through data pre-processing, data fusion, slider data correction, curve fitting, and wear curve extraction. Qin et al [4] propose a fast self-calibration method of a line laser sensor for the on-machine measurement of honeycomb cores. Liang et al [5] developed a hole burr measurement system based on a 2D laser displacement sensor, which can realize the rapid measurement of the burr height and burr root thickness.…”

Section: Introductionmentioning

confidence: 99%

Air conditioning compressor crankshaft roundness measurement based on a laser profiler

Liang,

Sun

2024

Meas. Sci. Technol.

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Crankshafts are key components of air conditioning compressors. The good roundness of a crankshaft has positive effects on improving operating stability, service life, working efficiency, and noise radiation of the compressor. This study proposes a line point cloud data merging method for measuring the crankshaft roundness with a laser profiler. First, a crankshaft roundness measurement system for air conditioning compressors is developed, and a high-accuracy 2D laser displacement sensor is employed to collect the line point cloud data. Second, the steps of the merging method are divided into two parts: 1)the radial merging to eliminate the effects of eccentricity; 2)the circumferential merging to remove overlapping data points of two adjacent profiles. Then, a pin gauge is used to select the point cloud region of the profile line for data merging.Experimental results show that the measurement repeatability of the proposed system can be controlled at the micrometer level. Besides, the roundness measured from the merged data is very close to the roundness measuring instrument measurements, which verifies the accuracy of the measurement system and the validity of the line point data merging algorithm.

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Section: Introductionmentioning

confidence: 99%

Air conditioning compressor crankshaft roundness measurement based on a laser profiler

Liang,

Sun

2024

Meas. Sci. Technol.

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“…Rigid-foam core is commonly used and has moderate strength and stiffness [11]. Moreover, one of the common cores used in sandwich panels is a honeycomb [12][13][14]. In general, sandwich structures are preferred over traditional materials due to their high corrosion resistance [15] and low thermal and acoustic conductivity [16,17].…”

Section: Introductionmentioning

confidence: 99%

Thermal Buckling and Bending Analyses of Carbon Foam Beams Sandwiched by Composite Faces Under Axial Compression

Safaei

Onyibo²,

Hurdoganoglu³

2022

FU Mech Eng

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The bending and critical buckling loads of a sandwich beam structure subjected to thermal load and axial compression were simulated and temperature distribution across sandwich layers was investigated by finite element analysis and validated analytically. The sandwich structure was consisted of two face sheets and a core, carbon fiber and carbon foam were used as face sheet and core respectively for more efficient stiffness results. The analysis was repeated with different materials to reduce thermal strain and heat flux of sandwich beams. Applying both ends fixed as temperature boundary conditions, temperature induced stresses were observed, steady-state thermal analysis was performed, and conduction through sandwich layers along with their deformation nature were investigated based on the material properties of the combination of face sheets and core. The best material combination was found for the reduction of heat flux and thermal strain, and addition of aerogel material significantly reduced thermal stresses without adding weight to the sandwich structure.

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“…It is also because the motion of the robot is controllable, the structured light projected onto the flat plate shows a circular pattern. Qin et al [27] calculated the sensor rotational errors reversely from the data dislocation originating from the sensor without calibration, and then calibrated the sensor by mechanical adjustment and Figure 1 The integrated system of an AACMM and a laser line sensor numerical compensation. In this method, the stitching of data depends on objects with special structure such as honeycomb cores.…”

Section: Introductionmentioning

confidence: 99%

Flexible Scanning Method by Integrating Laser Line Sensors with Articulated Arm Coordinate Measuring Machines

Xie

Gong

et al. 2022

Chin. J. Mech. Eng.

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Measuring and reconstructing the shape of workpieces have been considered as a fundamental step in both reverse engineering and product quality control. Owing to increasing structural complexity of recent products, measurements from multiple directions are typically required in current scanning techniques. Specifically, the plane structured light can be applied to measure one area of a part at a time, with an additional algorithm required to merge the collected data of each area. Alternatively, the line structured light sensor integrated on CNC machines or CMMs could also realize multi-view measurement. However, the system needs to be repeatedly calibrated at each new direction. This paper presents a flexible scanning method by integrating laser line sensors with articulated arm coordinate measuring machines (AACMM). Since the output of the laser line sensor is 2D raw data in the laser plane, our system model introduces an explicit transformation from the 2D sensor coordinate frame to the 3D base coordinate frame of the AACMM (i.e., the translation and rotation the of the 2D sensor coordinate in the sixth coordinate system of AACMM). To solve the model, the “conjugate pairs” are proposed and identified by measuring a fixed point (e.g., a sphere center). Moreover, a search algorithm is adopted to find the optimal solution, which noticeably boosts the model accuracy. The experimental results show that the error of the system is about 0.2 mm, which is caused by the error of the AACMM, the sensor error and the calibration error. By measuring a complicated part, the proposed system is proved to be flexible and facilitate, with the ability to measure a part expediently from any necessary direction. Furthermore, the proposed calibration method can also be used for robot hand-eye relationship calibration.

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A fast self-calibration method of line laser sensors for on-machine measurement of honeycomb cores

Cited by 10 publications

References 22 publications

Air conditioning compressor crankshaft roundness measurement based on a laser profiler

Air conditioning compressor crankshaft roundness measurement based on a laser profiler

Thermal Buckling and Bending Analyses of Carbon Foam Beams Sandwiched by Composite Faces Under Axial Compression

Flexible Scanning Method by Integrating Laser Line Sensors with Articulated Arm Coordinate Measuring Machines

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