摘要
基于超声技术和复杂可编程逻辑器件(CPLD)实现对两路同频超声传输过程中不仅是半个周期以内的相位差,而且大于半个周期乃至多个半周期的相位差的检测,仿真实现了微量气体浓度宽量程范围的检测,为基于超声技术的微量气体浓度检测的量程拓展提供了技术借鉴。
Based on ultrasonic technology and complex programmable logic device （CPLD）, the phase difference detection of less than or more than half a cycle, and even spanning more semi-cycles, is carried out in the transmission process of two channels of ultrasonic. Also the wide-range micro-concentration gas test is achieved by simulation. This research provides a technical reference for the measuring range expansion of micro-concentration gas detection based on ultrasonic technology.
出处
《声学技术》
CSCD
北大核心
2008年第1期40-43,共4页
Technical Acoustics
基金
国家自然科学基金项目(10574038)
江苏高校高新技术产业发展项目(JHB05-08)
常州市新北区科技项目(2007026)
关键词
超声技术
CPLD
跨半周期
气体浓度
Ultrasonic technology
CPLD
Cross-half-cycle
Gas concentration
