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Yuan J.,Nantong University | Lv J.,Nantong University | Qiu Z.,Nantong University | Xue B.,Nantong Guosheng Electromechanical Group Co. | Liu C.,Nantong Guosheng Electromechanical Group Co.
Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument | Year: 2014

Aiming at the straightness error measurement of machine tool guideway, a new method of straightness error measurement and signal wireless transmission is proposed using the sensor-tag technology integrating radio frequency identification and sensor techniques. Based on laser collimation measurement principle, the straightness error data is measured with the improved tetra-lateral type 2D position sensitive detector, which has the merits of high precision, good linearity, small dark current and easy to add reverse bias voltage. The straightness errors in three directions and corresponding address coding information are packaged by the position-sensitive sensor tags installed in the X, Y, Z directions of the machine tool, and then transmitted wirelessly to the reader and computer; the communication protocol is simple and the energy consumption is low. An accurate algorithm meeting the least condition is adopted to evaluate the straightness error; the developed evaluation software has the features of high operation precision and fast operation speed, and can be used together with level, autocollimator and other straightness measurement instruments. Source


Yuan J.,Nantong University | Lu J.,Nantong University | Qiu Z.,Nantong University | Shen Y.,Nantong University | And 2 more authors.
Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | Year: 2015

To solve problems of complex cabling and temperature sensor placement optimization for CNC machine tool spindle thermal error by wired monitoring method, a new layout method of measuring points is proposed by golden section of heat sensitive area and the temperature distribution monitoring and wireless signal transmission are achieved by using temperature sensor tag. The temperature sensor tag is designed by integrating digital temperature sensor DS18B20, microprocessor MSP430, radio frequency communication module NRF905. The temperature signal and tag address information were transmitted to computer by radio frequency communication, the communication protocol is simple and energy consumption is low. According to the finite element analysis model of the machine spindle, the heat sensitive area is determined by golden section method. It can solve problems of traditional experience method such as data redundancy, unreliability, uncertain optimal test conditions and etc. The monitoring system is built by using temperature sensor tag and laser displacement sensor, and the thermal error experiment was done by the orthogonal test. The results of range analysis and regression analysis show that the system has the characteristics of reliability, strong real-time processing capability, and the regression model also has good prediction ability. ©, 2015, Journal of Mechanical Engineering. All right reserved. Source

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