Robust Precise Time Difference Estimation Based on Digital Zero-Crossing   Detection Algorithm

doi:10.1109/TIM.2016.2562318

CORC > 北京大学 > 信息科学技术学院

	Robust Precise Time Difference Estimation Based on Digital Zero-Crossing Detection Algorithm
	Chen, Zhipeng ; Li, Zhaohui
刊名	IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
	2016
关键词	Digital zero-crossing detection signal reconstruction time difference estimation time interval ultrasonic flow measurement SAW FILTER EXCITATION DELAY CONVERTER SYSTEMS
DOI	10.1109/TIM.2016.2562318
英文摘要	Precise time difference (time interval) measurement has been widely applied in communication, detection, and metrology. Among the various methods of time difference measurement, the analog zero-crossing detection method and the full digital processing methods are commonly used in ultrasonic flow measurement application. Conventional full digital processing methods, which take advantage of total signals' waveforms, can have high accuracy in high signal to noise ratio (SNR) when employing a high enough sampling frequency and extremely high performance digital signal processors; but their accuracies are severely limited by the hardware costs and can be easily affected by the noise and the distortion of signals. As a viable method, the analog zero-crossing detection method can achieve high resolution, whose accuracy, however, is easily influenced by the detection threshold and baseline shifts of the received signals, as well as the noises. In this paper, the digital zero-crossing detection algorithm is proposed for ultrasonic flow measurement to achieve high-precision and high-robustness time difference estimation at relatively low hardware costs, i.e., a relatively low sampling rate (e.g., 10 Msamples/s) and a relatively low computational load. The digital zero-crossing detection algorithm is performed with the signal reconstruction and the least-square fitting technologies. The simulation and experiment results show that compared with conventional methods, the proposed method presents higher accuracy and higher robustness, especially in the case of low SNR.; SCI(E); EI; ARTICLE; chenzp91@163.com; lizhcat@pku.edu.cn; 8; 1739-1748; 65
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/494544]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Chen, Zhipeng,Li, Zhaohui. Robust Precise Time Difference Estimation Based on Digital Zero-Crossing Detection Algorithm[J]. IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT,2016.
APA	Chen, Zhipeng,&Li, Zhaohui.(2016).Robust Precise Time Difference Estimation Based on Digital Zero-Crossing Detection Algorithm.IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT.
MLA	Chen, Zhipeng,et al."Robust Precise Time Difference Estimation Based on Digital Zero-Crossing Detection Algorithm".IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT (2016).