物联网-智慧传输-基于时栅传感器的精密蜗轮副动态检测技术研究.pdf
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ABSTRACT
Worm gear and worm transmission has the characteristic of high transmission ratio, good
stationarity, low noise, compact construction and self-locking for requirement, which has wildly
applied to machinery processing and manufacturing industries, especially in precision mechanic and
precision instrument manufacture. Measured worm gear transmission errors can describe accuracy
parameters synthetically.
Research team designed a “full microcomputerized test system of gear machine accuracy”
(FMT) in 1991, which combines circle magnetic encoders of bearing spring to realize transmission
chain errors measurement. This measuring system has been successfully applied to fault diagnosis of
machine tools for many years. With the development of microelectronic technology, traditional
computers in the 90s are replaced by advanced ones with novel hardware. In addition, DOS
operating system is update to Windows operating system. In sensor field, magnetic encoders are
gradually withdrawn from the market for some reasons. Currently the most common used
displacement sensor is optical grating, but advanced optical gratings are rely on import, So the price
is much high, and some optical gratings with certain accuracy are under import restriction, which is
the key to restrict the manufacturing industry of detecting instruments and numerical control system.
Time grating displacement sensors are original inventions with proprietary intellectual property
rights, which have the characteristic of high accuracy, low cost, strong anti-interference and so on.
They are mainly applied to measurement field in industrial production.
On the one hand, research work adopt new technology to realize a novel FMT system based on
original FMT system; On the other hand, in order to remain past several decades of transmission
error measurement experience with incremental sensors, original absolute angular signal outputted
by time grating sensors should be transformed to incremental pulses of spatial equal division. In this
way, a novel FMT system based on absolute time grating sensor is designed. So this measurement
system can be applied to transmission error measurement with high accuracy and low cost, as well as
the transmission accuracy measurement of machine tool.
Main research content and innovations are as follow:
1. A forecasting method is employed to dynamic measurement with time grating displacement
sensor. According to analysis on series of measured data for certain space with time grating
displacement sensor, the future measurement data can be forecasted. In this way, absolute time
grating sensors can be transformed to incremental ones.
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