| Summary: | 碩士 === 國立中興大學 === 機械工程學系所 === 104 === The main purpose of this paper is to develop a new concept of wireless measurement system. Use Bluetooth wireless transmission mode to dismiss cable transmission of limitation. The second thing, use battery module to replace variable power supplier. This method can eliminate noise having a 60Hz power mains. The third thing, increasing the Z-axis measurement method to achieve goal of 2.5D. In the two-dimensional dynamic contours as the circular path and simultaneously measure the amount of vibration to the third dimension. Design Tool Center Point of two-dimensional contour measuring system.
This measurement system is based on the red laser of pick-up head and position sensitive detector (PSD) as a main component measurement. The pick-up head is regarded as the Tool Center Point and PSD is regarded as the feed platform. Use DC power and low-pass filter thereby to reduce the signal of noise. And then, by using MCU , ADC module and Bluetooth chip for wireless transmission of data to the PC receives data. Analysis of data via Matlab program. The advantage of this measurement system is that it can measure arbitrarily contours , low cost and easy to maintenance.
In this paper, the measurement systems used in machine tools circular contouring measurement. Its original signal to noise rate of about 1μm. In addition to its resolution up to 1μm. X axis and Y axis direction linear interval range are all ±3mm. At 1000 mm/min , 2000 mm/min , 3000 mm/min , 4000 mm/min , 5000 mm/min feed rate of 1mm radius of a circular test can be observed as a phenomenon in different circles shrink. This measurement system at a feed rate 1000 mm/min that circular deviation value is 0.0195 mm. The KGM circle deviation value is 0.0106. In addition, also set fast , steady , accurate parameter is the path in diamond and observing their behavior at the corner. The contouring error of this measurement system is in less than 10μm. But the contouring error of KGM measurement system is in less than 1μm.
By the results of the measurements it can be concluded that the present system has a measurement repeatability and resolution up to 1μm. Circular contouring measurement results at different feed rates are consistent with the measurement results of KGM. Feasibility of the measurement system confirmed. Additionally the Z-axis can be detected in the two-dimensional dynamic contour.
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