摘要
针对当前气体超声波流量计中存在的设计复杂和测量精度低的现状,以DSP作为核心控制芯片,采用时差法为测量方法,利用小波变换对信号进行处理,给出了详细的硬件和软件设计方案,并且对小波降噪算法进行了仿真。仿真结果和试验验证表明,该设计能较大程度地简化系统的设计,同时提高了系统的运算速度和测量精度。
In view of current ultrasonic gas flowmeter existing the problem of complex design and low measuring accuracy,a new project is proposed,which is based on DSP as the core control chip,uses transit time method as measure method,and adopts wavelet transform to process the signal.The detailed design of hardware and software is proposed,and the wavelet algorithm of denoising is simulated.The results of simulation and experiment show that the project can greatly simplify the system design,and also improve the speed of operation and the measurement accuracy.
出处
《仪表技术与传感器》
CSCD
北大核心
2014年第3期17-19,共3页
Instrument Technique and Sensor
关键词
时差法
气体超声波流量计
小波降噪
transit time method
ultrasonic gas flowmeter
wavelet denoising
