A simple dual-frequency noise laser rangefinder

2019 ◽  
Author(s):  
Daniel Onori ◽  
José Azaña
Keyword(s):  
Frequency Noise ◽  
Laser Rangefinder ◽  
Dual Frequency

Study on the Dual-Frequency Excited Electromagnetic Flowmeter

2012 ◽  
Vol 241-244 ◽  
pp. 571-575
Author(s):  
Tie Jun Liu ◽  
Yin Jia Chen
Keyword(s):  
Fluid Velocity ◽  
Electromagnetic Flowmeter ◽  
Low Frequency ◽  
Zero Point ◽  
Frequency Noise ◽  
Dual Frequency ◽  
Excitation Scheme ◽  
Fast Change ◽  
Frequency Excitation ◽  
Time Division

A time-division dual-frequency excitation scheme was proposed as an improvement to the traditional electromagnetic flowmeters. The proposed scheme keeps the advantage of zero-point stability of the traditional design, the immunity to low frequency noise is enhanced, and the response to fast change of fluid velocity is improved. A prototype flowmeter was made based on the proposed design, experiment results show that the prototype flowmeter can measure water flow in a wide velocity range with satisfactory accuracy.

Assessment of GNSS Performance on Dual-Frequency Smartphones

2019 ◽  
Author(s):  
Thorsten Jahn ◽  
Melanie Kaindl ◽  
Ignacio Viciano Semper ◽  
Sophie Damy ◽  
Moisés Navarro-Gallardo ◽  
...  
Keyword(s):  
Dual Frequency

A PORTABLE DUAL FREQUENCY COMB SPECTROMETER FOR ATMOSPHERIC APPLICATIONS

2016 ◽  
Author(s):  
Kevin Cossel ◽  
Nathan Newbury ◽  
Ian Coddington ◽  
Greg Rieker ◽  
Robert Wright ◽  
...  
Keyword(s):  
Frequency Comb ◽  
Dual Frequency
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