Research on anti-noise performance of Digital Phase Sensitive Detection Algorithm in Magnetic Nanoparticle Thermometer

2019 ◽  
Author(s):  
Na Ye ◽  
Jiangbo Qin ◽  
Dandan Wang ◽  
Rijian Su ◽  
Yi Sun
Keyword(s):  
Magnetic Nanoparticle ◽  
Detection Algorithm ◽  
Sensitive Detection ◽  
Noise Performance ◽  
Digital Phase ◽  
Phase Sensitive ◽  
Phase Sensitive Detection

Application of Digital Phase Sensitive Detection for Electromagnetic Propagation Logging while Drilling

2012 ◽  
Vol 468-471 ◽  
pp. 546-549 ◽  
Author(s):  
Sheng Hu Liu ◽  
Ya Min Xing
Keyword(s):  
Electromagnetic Interference ◽  
High Performance ◽  
Sensitive Detection ◽  
Control Logic ◽  
Electromagnetic Propagation ◽  
Calculating Method ◽  
Digital Phase ◽  
Phase Sensitive ◽  
Phase Sensitive Detection ◽  
Logging While Drilling

Intense electromagnetic interference while drilling prevents traditional analog phase sensitive detection (APSD) from correctly acquiring electromagnetic wave signal of logging while drilling (LWD). A digital phase sensitive detection (DPSD) utilizes high-performance floating-point DSP and FPGA to separately process real part and imaginary part of the acquired logging signal, changes traditional calculating method, improves processing speed and calculating precision. The programmable technique used can fully utilize logging information, simplify control logic, improve precision of timing control and measuring precision. Discussed are the principle, characteristics, implement of circuit and analysis of experimental data. Testing result shows that the DPSD may utilize logging information effectively and optimize the LWD system.

Implementation of Digital Phase-Sensitive Detection in Wavelength Modulation Spectroscopy Measurement System

2013 ◽  
Vol 40 (11) ◽  
pp. 1115001
Author(s):  
李晗 Li Han ◽  
刘建国 Liu Jianguo ◽  
阚瑞峰 Kan Ruifeng ◽  
姚路 Yao Lu ◽  
许振宇 Xu Zhenyu ◽  
...  
Keyword(s):  
Measurement System ◽  
Wavelength Modulation Spectroscopy ◽  
Sensitive Detection ◽  
Wavelength Modulation ◽  
Modulation Spectroscopy ◽  
Spectroscopy Measurement ◽  
Digital Phase ◽  
Phase Sensitive ◽  
Phase Sensitive Detection

Bioelectrical Impedance Measurement Way Based on an Improved DPSD Algorithm

2012 ◽  
Vol 182-183 ◽  
pp. 1694-1697
Author(s):  
Jie Tao Diao ◽  
Qi You Xie ◽  
Miao Li ◽  
Wen Li Liu ◽  
Zhao Lin Sun
Keyword(s):  
Impedance Measurement ◽  
Bioelectrical Impedance ◽  
Sensitive Detection ◽  
Improved Method ◽  
Digital Phase ◽  
Phase Sensitive ◽  
Phase Sensitive Detection

In Bioelectrical impedance measurement, the impedance accuracy is a very important parameter. With the analysis of general Digital Phase Sensitive Detection (DPSD) algorithm and its error, this paper presents an improved DPSD algorithm. In this method, it firstly decomposes the orthogonal signals which have passed through the networks, and then sums (minus) the relevant signals to get the parameters amplitude and phase. By this way, it can avoid errors caused by filtering operation in general DPSD algorithm. At last, the paper gives a simulation which can be hardware-based achieved. The result proves the effectiveness and feasibility of this improved method.

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