With the increasing demand of engineering surveying, the surveying and mapping instruments used in engineering surveying are also increasing, and the problem of tracing the source of these large surveying and mapping instruments is becoming increasingly prominent. This paper mainly studies the traceability problems of four kinds of surveying instruments, namely steel rule water level meter, large space handheld scanner, total station scanner and frequency modulation laser rangefinder, using data comparison and fitting analysis of indicating errors. Finally, we get that the FM laser rangefinder is the micron level measuring instrument, the steel rule water level meter and the whole station scanner are the millimeter level measuring instruments, and the large space handheld scanner is the centimeter level mapping instrument.
Knuckle arm CMM is a widely used standard in the field of industrial measurement. In this paper, the calibration of knuckle arm CMM and the industrial application of knuckle arm CMM are introduced. The calibration of articulated arm coordinate measuring machine can help us to know its measurement accuracy. This paper introduces the matters needing attention in the calibration process in detail. Knuckle-arm CMM is mainly used in automobile industry, heavy industry, surface inspection, blade measurement, casting blank inspection, reverse engineering and cultural relic digitization. This paper analyzes its application in automobile industry as a case.
Aiming at the characteristics of high intensity and low efficiency of manual sorting of irregular shaped workpieces, a workpiece sorting system based on visual recognition was studied in this paper. A new sorting system based on ROS robot system in Linux environment is proposed. Machine vision technology and ROS method are used in the intelligent sorting of common shape geometry. Firstly, considering the characteristics of large amount of operation and high flexibility of workpiece sorting, the Baxter dual arm robot was selected as the hardware device, an experimental platform for workpiece sorting was constructed. Secondly, the template matching method based on edge information detection realizes image acquisition and processes the collected image to solve the difficult problem of workpiece recognition caused by large background noise and low image feature contrast, Open cv combined with VC + + was used to realize the design of visual program and the motion control function of actuator. The simulation results show that the workpiece sorting method based on visual recognition technology has the characteristics of fast timeliness, strong flexibility and high stability, and can be applied to the rapid sorting of irregular parts.
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