摘要
以Microchip公司PIC24F系列单片机内嵌的CTMU为核心,将CTMU与ADC单元组成基本控制模块,利用CTMU提供脉冲源之间的精确时间差测量功能,提出了一种新的精确激光测距设计方案。并且通过粗粒度时间和细粒度时间组合的计算方法,既扩大了CTMU动态范围,又不损失分辨率。本设计成本低且测距精度高,为现在日益发展的测量距离技术提供了一个新的方法和思路。
Taking the embedded CTMU of Microchip PIC24F Series MCU as the core, the basic control module is composed of CTMU and ADC unit. This design puts forward a new design scheme of precise laser ranging which uses measurement function of time differ- ence between CTMU pulse sources. And through the combination calculation method of coarse-grained time and fine-grained time,the design can expand the dynamic range of CTMU without loss. The design of low cost and high precision provides a new method and train of thought for the growing distance measurement technology.
出处
《单片机与嵌入式系统应用》
2013年第2期45-47,共3页
Microcontrollers & Embedded Systems
关键词
CTMU
恒流源
激光测距
时间测量
CTMU
constant current source
laser ranging
time measurement
