scholarly journals Control and Signal Acquisition System of Broad-Spectrum Micro-Near-Infrared Spectrometer Based on Dual Single Detector

Micromachines ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 696
Author(s):  
Haitao Liu ◽  
Shuoran Niu ◽  
Ying Zhou ◽  
Liwei Yu ◽  
Yue Ou ◽  
...  
Keyword(s):  
High Speed ◽  
Near Infrared ◽  
Acquisition System ◽  
Signal Acquisition ◽  
Detection Range ◽  
Precise Control ◽  
Spectrum Detection ◽  
Angle Data ◽  
Single Detector ◽  
Infrared Spectrometer

Based on the scanning grating mirror developed by us, this paper presents a method for precise control of the scanning grating mirror and high-speed spectrum data acquisition. In addition, a system circuit of the scanning grating mirror control and a spectrum signal acquisition system were designed and manufactured. The final results of the experiment show that the control system successfully allowed the precise control of the swing of the scanning grating mirror and the acquisition system successfully carried out the high-speed acquisition and transmission of the spectrum and angle data. The spectrum detection range of the NIR spectrometer was 80–2532 nm. The overall resolution of the spectrum was better than 12 nm.

scholarly journals WIRELESS DISTRIBUTED ACQUISITION SYSTEM FOR NEAR INFRARED SPECTROSCOPY – WDA-NIRS

2013 ◽  
Vol 06 (03) ◽  
pp. 1350019 ◽  
Author(s):  
J. SAFAIE ◽  
R. GREBE ◽  
H. ABRISHAMI MOGHADDAM ◽  
F. WALLOIS
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Continuous Wave ◽  
Oxygenation Index ◽  
Base Station ◽  
The Body ◽  
Acquisition System ◽  
Signal Acquisition ◽  
Local Skin

The wireless distributed acquisition system for near infrared spectroscopy (WDA-NIRS) is a portable, ultra-compact, continuous wave (CW) NIRS system. Its main advantage is that it allows continuous synchronized multi-site hemodynamic monitoring. The WDA-NIRS system calculates online changes in hemoglobin concentration based on modified Beer–Lambert law and the tissue oxygenation index based on the spatial-resolved spectroscopy method. It consists of up to seven signal acquisition units, sufficiently small to be easily attached to any part of the body. These units are remotely synchronized by a PC base station for independent acquisition of NIRS signals. Each acquisition module can be freely adapted to individual requirements such as local skin properties and the microcirculation of interest, e.g., different muscles, brain, skin, etc. For this purpose, the light emitted by each LED can be individually, interactively or automatically adjusted to local needs. Furthermore, the user can freely create an emitter time-multiplexing protocol and choose the detector sensitivity most suitable to a particular situation. The potential diagnostic value of this advanced device is demonstrated by three typical applications.

A USB Interface High-Speed Data Acquisition System

2011 ◽  
Vol 130-134 ◽  
pp. 2170-2173 ◽  
Author(s):  
Wei Cui ◽  
Lei Chen ◽  
Xing Guang Li
Keyword(s):  
High Speed ◽  
Continuous Wave ◽  
Sampling Rate ◽  
Acquisition System ◽  
Signal Acquisition ◽  
Lidar Signal ◽  
Usb Interface ◽  
High Speed Data Acquisition ◽  
High Speed Data ◽  
Signal Correlation

A continuous-wave lidar signal acquisition system with USB2.0 interface is present，in this paper. The hardware and the application program has been designed, its sampling rate is up to 1000Msps by flywheel A/D circuit. The signal correlation and accumulation is processed by using FPGA with512M RAM .The experimental results show that it can be used in a variety of systems.

Development of a High-Speed Ion Signal Acquisition System for Mass Spectrometer

2012 ◽  
Vol 239-240 ◽  
pp. 889-894
Author(s):  
Hong Qi Yu ◽  
Yi Nan Wang ◽  
Jin Ling Xing ◽  
Peng Wang ◽  
Hu Sheng Liu ◽  
...  
Keyword(s):  
Data Acquisition ◽  
High Speed ◽  
Rapid Development ◽  
Data Acquisition System ◽  
Acquisition System ◽  
Signal Acquisition ◽  
High Resolution Data ◽  
Analog To Digital ◽  
Gigabit Ethernet ◽  
High Data

Due to the rapid development of manufacturing technology, high-speed high-resolution data acquisition system has been widely applied in plenty of engineering fields, such as radar, environmental surveillance, mass spectrometry, etc. In order to satisfy the increasing requirement, we present the design of a high-speed data acquisition system, which is mainly composed of high-speed time-interleaved analog-to-digital converter, high data throughput interface based on 10 gigabit Ethernet. The detailed design and realization of each module are presented. Finally we test and analysis the performance of the ion signal acquisition system, and the results show that the system performs fine speed, high precision and stability.

Research of the Hadamard Multiplex Advantages Using a Programmable Micro-Mirror in a Near-Infrared Spectrometer

2011 ◽  
Vol 483 ◽  
pp. 417-421
Author(s):  
Yuan Jun Guo ◽  
Zhi Yu Wen ◽  
Zhi Hai Zhang ◽  
Wei Wang
Keyword(s):  
Near Infrared ◽  
Luminous Flux ◽  
Hadamard Transform ◽  
Weak Signal ◽  
Signal To Noise ◽  
Theoretic Result ◽  
S Matrix ◽  
Single Detector ◽  
Infrared Spectrometer ◽  
Near Infrared Spectrometer

A programmable micro mirror has been used in a near infrared spectrometer in order to achieve the purpose of signal multiplexing, to solve the problem of low luminous flux when using single slit and to increase the signal-to-noise (SNR) ratio. Use Hadamard Transform (HT) and programmable micro mirror as its encoding mask to detect the whole spectrum with a single detector, research and analyze the enhancement of SNR of the weak signal. First of all, the mask symbol number is fixed as 63-order based on the Hadamard Transform principle, calculate the optimal S-Matrix, and then the encoding mask has been realized by micro mirror. At last, carry out some experimental verifications as well as data analyzing, discuss the alternating spectrum signal which produce an effect on transformational algorithm, bring out the coadded upswing plan. The result shows that: the conflict of resolution and SNR can be well settled with Hadamard multiplex. The SNR can be increased by the factor of 3.5, which is identical with the theoretic result.

High-Speed Acquisition and Filtering of Yarn Signal

2013 ◽  
Vol 411-414 ◽  
pp. 1529-1534 ◽  
Author(s):  
Ying Jie Xu ◽  
Ming Yu Gao ◽  
Zhi Wei He
Keyword(s):  
Data Collection ◽  
Noise Level ◽  
High Speed ◽  
Wiener Filter ◽  
Acquisition System ◽  
Signal Acquisition ◽  
Communication Mode ◽  
Mean Filter ◽  
The Mean ◽  
Sample Rate

We have designed a photoelectric yarn signal acquisition system, which is based on the STM32 processor, having a sample rate up to 270kHz, and uploading data collection through synchronous parallel communication mode; Owing to the large noise of yarn signal and the unobviousness of yarn defect, we respectively adopting wiener filter and mean filter to filter this signal; The simulation result of matlab has manifested that both the wiener filter and mean filter can effectively decrease the noise level of the yarn signal and make the nep defects easier to identify, and that the wiener filter applies to application where the yarn speed is higher , while the mean filter is appropriate to the lower speed spinner.

Applied Technology in "GNSS if Signal Acquisition System" and Software Receiver Design

2014 ◽  
Vol 1003 ◽  
pp. 235-238
Author(s):  
Yu Yang ◽  
Chang Lin Yang ◽  
Yan Fei Liu
Keyword(s):  
Data Transmission ◽  
High Speed ◽  
Transmission Rate ◽  
Transmission Function ◽  
Intermediate Frequency ◽  
Acquisition System ◽  
Signal Acquisition ◽  
Software Receiver ◽  
Application Development ◽  
Development Framework

The paper completed the software and hardware design of GNSS intermediate frequency signal acquisition system under Linux operating system, realized the GNSS software receiver under Linux. Basing on QT C++ graphical user interface application development framework and Qwt plug-in, the software and data graphical display interface was also accomplished. By caching the data of RF module and controlling read and write signals of CY7C68013A through FPGA, the high-speed data transmission function was completed. The test results show that the data transmission rate of this data acquisition system can reach more than 200 Mbps, software receiver satisfies the requirement of positioning accuracy, has good flexibility and higher adaptability, and the algorithm of which was easy to be expanded and upgraded.

Characterization of a Noncolinear Acousto-Optic Tunable Filter and its Resolution Enhancement as a Near-Infrared Spectrometer

2001 ◽  
Vol 55 (3) ◽  
pp. 350-355 ◽  
Author(s):  
Andrew Y. S. Cheng ◽  
Jianhua Zhu ◽  
Michael C. Y. Pau
Keyword(s):  
High Speed ◽  
Near Infrared ◽  
Spectral Characteristics ◽  
Resolution Enhancement ◽  
Tunable Filter ◽  
Spectral Lines ◽  
Band Spectrum ◽  
Fine Spectrum ◽  
Infrared Spectrometer ◽  
Near Infrared Spectrometer

An automatic near-infrared (NIR) spectrometer based on a noncolinear acousto-optic tunable filter (AOTF) is constructed for high-speed spectrometry. Its initial spectral characteristics are studied systematically for application. The AOTF is a solid-state, rugged, compact, and high-speed device and can be readily used for spectral measurement applications, but some broadening and overlapping effects will occur when it is used for the measurement of a narrow-band spectrum. In order to correct the spectral distortion and obtain a fine spectrum, a new resolution enhancement procedure, which combines conventional Fourier self-deconvolution (FSD) with our optimized evaluation function and objective parameters determination, is used to resolve the band-broadened and band-overlapped spectral lines. The self-deconvolved spectrum is in good agreement with the fine spectrum measured by a high-resolution grating spectrometer. This is, to our knowledge, the first resolution enhancement of an AOTF spectrum by analytical and numerical operation.

Design and Implementation of Valve Failure Signal Multi-Channel Acquisition System Based on Acoustic Emission and Pipeline

2012 ◽  
Vol 460 ◽  
pp. 281-285
Author(s):  
Ting Feng ◽  
Jian De Wu ◽  
Xu Yi Yuan ◽  
Yu Gang Fan ◽  
Xiao Dong Wang
Keyword(s):  
Acoustic Emission ◽  
High Speed ◽  
Gain Control ◽  
Control Unit ◽  
High Sensitivity ◽  
Acquisition System ◽  
Signal Acquisition ◽  
Emission Data ◽  
Emission Signal ◽  
Data Output

Designed and implemented acoustic emission signal acquisition system core with microprocessor STM32F103RB. Acquisition system included high sensitivity acoustic emission sensors: PXR20; signal conditioning for acoustic emission, used high-speed ADC AD9225 for A/D conversion; used FIFO module for data buffer; used USB to serial port technology for data communications and transmissions. Central control unit design included gain control of amplifier circuit, clock control of external AD-chip and data cache chip, data acquisition port control, data output port control. Experimental results show that the system implements a multi-channel, parallel, high-precision acquisition and transmission for acoustic emission data.

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