大行程油缸/气缸高精度位移检测方法研究

Research on High-precision Displacement Measurement Method for Large-stroke Hydro-cylinder / Air-cylinder

随着液压、气压系统在大型高精密设备上运用越来越广泛,对大行程油缸、气缸输出轴位移的检测精度要求也越来越高。位移传感器是大行程油缸、气缸位移高精度检测的关键,但随着油缸、气缸行程越来越大,检测精度要求越来越高,位移传感器由于主观、客观原因越来越难满足检测要求。该文对常用的大行程位移传感器特点进行了分析与梳理,详细阐述了现行位移传感器对大行程油缸、气缸高精度位移检测所面临的难题,最后提出一种可以实现大行程油缸、气缸高精度位移检测的设计方案,该方案测量精度高、量程大、适应性强、造价便宜。该文可以为大行程、超大行程油缸、气缸高精度位移检测提供参考。

With the hydraulic and pneumatic systems used in the large-stroke high-precision equipment more widely, the requirement of mea- surement accuracy is getting higher and higher for displacement of the output shaft of large-stroke hydro-cylinder/air-cylinder. Displacement sensor is the key for high-precision displacement measurement of large-stroke hydro-cylinder/air-cylinder. But with the stroke of hydro-cyl- inder/air-cylinder more and more large, the requirement of measurement accuracy more and more high, displacement sensors are becoming increasingly difficult to meet the measurement requirements due to subjective and objective reasons .In this paper, firstly, there is a analysis about the characteristics of large-range displacement sensors. Then, this article analyzes the problems the current large-range displacement sensors face to achieve high-precision displacement measurement of large-stroke hydro-cylinder/air-cylinder. Finally, this paper proposes a solution to achieve high precision measurement of large, very large stroke hydro-cylinder/air-cylinder. This solution shows higher measuring accuracy, greater range, stronger adaptation and lower cost. This paper can provide the reference for high-precision displacement measure- ment of hydro-cylinder/air-cylinder.