Reduced Low-Voltage Electromyographic Signal Acquisition System Using Subthreshold Technique

2020 ◽  
Author(s):  
J. Ramirez Sanchez ◽  
A. Medina Vazquez ◽  
I. Padilla Cantoya
Keyword(s):  
Low Voltage ◽  
Acquisition System ◽  
Signal Acquisition ◽  
Electromyographic Signal

Improvement and Design of Single Coil Vibrating-Wire Sensor Signal Acquisition System Based on STM32

2014 ◽  
Vol 511-512 ◽  
pp. 764-769
Author(s):  
Suo Ying Mao ◽  
Jun Hua Zhao ◽  
Fang Fang Zhou
Keyword(s):  
Low Voltage ◽  
Frequency Measurement ◽  
Acquisition System ◽  
Signal Acquisition ◽  
Sensor Signal ◽  
Vibrating Wire ◽  
Soil Pressure ◽  
Single Coil ◽  
Voltage Feedback ◽  
Signal Normalization

Vibrating wire sensor signal acquisition system is widely used in the fields of water conservancy dam, slope, construction, mining and so on to measure osmotic pressure, soil pressure, strain and other physical quantities. This paper studies the single coil vibrating wire sensor signal acquisition system,which uses the STM32F103 core processor generating a low-voltage feedback PWM signal to excite vibrating wire with scanning frequency, after signal amplification, filtering and signal normalization through the frequency measurement module, and ultimately achieve frequency measurement. The system can improve the traditional vibrating wire acquisition instrument, so as to achieve fast and efficient and reliable long-lasting measurement. According to some simulation and designed circuit, the measured data and diagram can verify the feasibility of the method.

Study of the Metal Crack Propagation by Acoustic Emission Testing

2011 ◽  
Vol 105-107 ◽  
pp. 2179-2182
Author(s):  
Wei Min Zhang ◽  
Shu Xuan Liu ◽  
Yong Qiu ◽  
Cheng Feng Chen
Keyword(s):  
Acoustic Emission ◽  
Crack Propagation ◽  
Acquisition System ◽  
Signal Acquisition ◽  
Sensor Signal ◽  
Acoustic Emission Sensor ◽  
Axial Tension ◽  
Emission Testing ◽  
Acoustic Emission Testing ◽  
Signal Operating

Crack propagation is the main reason which leads to the invalidity of the metal components. A set of detecting equipment based on the acoustic emission method was designed, and it was mainly composed of acoustic emission sensor, signal operating circuits and signal acquisition system. Specimens of 16MnR material were manufactured and the static axial tension test of them was carried on. Acoustic emission signals from the specimen were detected by acoustic emission equipment by using piezoelectric ceramic sensor. Signal datum were acquired and operated by the acquisition system, as well as the acquisition program written for it. The final results has demonstrated that acoustic emission equipment designed for the test performed well in acquiring the signals induced by the metal crack propagation.

Design of ECG Acquisition System Based on Matlab

2013 ◽  
Vol 462-463 ◽  
pp. 1001-1004
Author(s):  
Xue Wang ◽  
Wen Liang Niu ◽  
Yuan Sheng Liu
Keyword(s):  
Heart Rate ◽  
Cost Savings ◽  
Acquisition System ◽  
Signal Acquisition ◽  
Ecg Signal ◽  
Threshold Selection ◽  
Selection Algorithm ◽  
Absolute Value ◽  
Wave Detection ◽  
Processing Circuit

In order to more accurate detection of ECG signal and cost savings, this paper designed a set of ECG signal acquisition system based on Matlab. The system is composed of hardware and software. Hardware is made up of signal acquisition processing circuit and MPC82G516 microcontroller for AD conversion. The software mainly contains configuring Matlab serial to realize communication with MPC82G516 and uses abundant filter resources of Matlab to remove noise by differential, absolute value, smoothing and threshold selection algorithm of R wave detection, R wave peak provides the basis for calculating the heart rate. This paper uses Matlab friendly user interface for displaying received data to make the data more intuitive and read more easily.

scholarly journals Design of Pulse Wave Feature Vigilance Detection System Based on Computer Software Technology

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Yidong Zeng ◽  
Jun Ji ◽  
Jinghua Wang ◽  
Jiasuo Gao ◽  
Jie Hu ◽  
...  
Keyword(s):  
Pulse Wave ◽  
Detection System ◽  
Skin Resistance ◽  
Computer Software ◽  
Pulse Amplitude ◽  
Acquisition System ◽  
Signal Acquisition ◽  
Blood Oxygen Saturation ◽  
Software Technology ◽  
Physiological Signal

In this paper, the pulse wave feature alertness detection system based on computer software technology is researched. First, the computer software technology designs the alertness detection system and then conducts the system alertness test experiment using a system that can not affect the subjects’ alertness, a portable multichannel physiological signal acquisition system that measures the subjects’ ECG signal, skin resistance, blood oxygen saturation, and other physiological signals in the case of a degree task experiment. The multichannel physiological signal acquisition system collects the signals during the vigilance task experiment. At the same time, before, during, and after the experiment, subjects are required to fill in the Stanford Sleepiness Scale (SSS) and evaluate the level of individual alertness through subjective self-evaluation. The relevant experimental data show that, 10 minutes before the experiment, the pulse amplitude increased rapidly, then slowly decreased at the beginning, reached a peak in about 25 minutes, and then began to rise.

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