High-resolution ultrasonic spectrometer using digital signal processing

被引：0
|
作者：
Daughton, DR [1 ]
Mulders, N [1 ]
机构：
[1] Univ Delaware, Newark, DE 19716 USA
来源：
JOURNAL OF LOW TEMPERATURE PHYSICS | 2004年 / 134卷 / 1-2期
关键词：
D O I：
10.1023/B:JOLT.0000012588.52547.2c
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have developed an ultrasonic system for high-resolution sound velocity and attenuation measurements using a phase-sensitive, time-of-flight technique. Signal processing, implemented in LabVIEW, is done entirely after digitization, removing the need for analog mixers and filters. At a signal level of 10 pW, the phase resolution is better than 10(-3) rad, and the signal-to-noise ratio in amplitude is better than 60 dB after averaging 400 acquisitions.
引用
收藏
页码：413 / 418
页数：6
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