摘要
为降低基于线性可调差动变压器(LVDT)的高精度位移测量仪的生产成本,并减小其产品体积,使产品更具市场竞争力,在分析其工作原理基础上,结合PSoC3"相比于传统单片机,更具系统单片化"的特点,提出了以CY8C3866AXI为核心的新型位移测量系统设计方案。该方案通过运用PSoC3内部的数字模块(DMA和LCD)与模拟模块(AD、DA、PGA等),自行设计了由整流电路、滤波电路和减法电路组成的信号调制电路,完全替代了目前市场上常用的AD698信号调制芯片和ARM控制器的产品组合结构,实现了位移高精度测量,测量精度可达到0.2μm。研究结果表明,该方案具有集成度高、线性度好、成本低廉等优点。
In order to reduce production costs and the volume of high-precision displacement measuring instrument based on the the linear variable differential transformer（LVDT）, and to make the products more competitive,taking the advantage that the PSoC3 is more system monolithic than traditional single-chip, a new design for displacement measurement system was proposed based on CYSC3866AXI by analyzing its working principles. The displacement of high-precision measurements was achieved through the use of PSoC3 within the digital module（DMA and LCD）, the analog modules （AD, DA, PGA, etc.）, and the signal modulation circuit was designed by oneself which is consisted of the rectifier circuit, filter circuit, and the subtraction circuit. The combination of ARM and AD698 product in the past was replaced by this design which has accuracy of 0.2 μm. The results indicate that this program has advantages such as high integration,good linearity and a low disbursement.
出处
《机电工程》
CAS
2012年第9期1032-1035,共4页
Journal of Mechanical & Electrical Engineering
关键词
位移测量仪
线性可调差动变压器
PSoC3
信号调制
displacement measuring instrument
linear variable differential transformer（LVDT）
PSoC3
signal modulation
