Design of SPI Bus Communication in the Multi-Channel Data Acquisition Systems

2012 ◽  
Vol 532-533 ◽  
pp. 187-191
Author(s):  
Bei Yang ◽  
Xiao Wu Ding
Keyword(s):  
Control System ◽  
Data Acquisition ◽  
System Structure ◽  
Signal Conditioning ◽  
Communication Design ◽  
Communication Interaction ◽  
Spi Bus ◽  
Speed And Accuracy ◽  
Signal Conditioning Circuit ◽  
Conditioning Circuit

the system structure of a multi-channel data acquirement system is introduced in this paper. The communication interaction circuit between the main control system and signal conditioning circuit is described. The SPI bus communication type is adopted between C8051F320 and FPGA. The speed and accuracy of datum transfer must be considered in the communication design, so the CRC calibration is used.

The Development of Rock Failure Electromagnetic Emission Monitoring System

2013 ◽  
Vol 330 ◽  
pp. 401-406
Author(s):  
Song Ling Huang ◽  
Fu Rong Zhu ◽  
Hong Xiu Zhu ◽  
Zheng Wei ◽  
Shen Wang
Keyword(s):  
Data Acquisition ◽  
Monitoring System ◽  
Electromagnetic Induction ◽  
Rock Fracture ◽  
Electromagnetic Emission ◽  
Rock Failure ◽  
Mine Safety ◽  
Signal Conditioning ◽  
Signal Conditioning Circuit ◽  
Conditioning Circuit

The research about electromagnetic emission (EME) during rock failure is very important to earthquake prediction and mine safety. A corresponding monitoring system has been developed according to the characteristics of EME signals during rock fracture, which include a wide frequency band and small amplitude of the inductive signals. The system is constituted by electromagnetic induction probe, signal-conditioning circuit and a computer for data acquisition. Among them, the electromagnetic induction probe can detect spatial magnetic field changes in a certain direction and convert it into electrical signals, the signal-conditioning circuit can magnify, filter and isolate signals acquired by the probe, and the computer for data acquisition is used for recording and displaying the detected signals. Several testing results have been achieved in rock failure experiments on marble that are carried out both by mechanical loading and expansion caused by chemical agents.

Signal conditioning circuit for gel strain sensors

2021 ◽  
Author(s):  
Ismael Payo ◽  
J. L. Polo ◽  
Blanca Lopez ◽  
Diana Serrano ◽  
Antonio M. Rodríguez ◽  
...  
Keyword(s):  
Electrical Resistance ◽  
Pressure Sensors ◽  
Strain Sensors ◽  
Resistance Force ◽  
Electrode Impedance ◽  
Signal Conditioning ◽  
Resistance Change ◽  
Signal Conditioning Circuit ◽  
Conditioning Circuit ◽  
Electrical Resistance Change

Abstract Conductive Hydrogels are soft materials which have been used by some researchers as resistive strain sensors in the last years. The electrical resistance change, when the sensor is stretched or compressed, is usually measured by the two-electrode method. This method is not always suitable to measure the electrical resistance of polymers-based materials, like hydrogels, because it could be highly influenced by the electrode/sample interface, as explained in this study. For this reason, a signal conditioning circuit, based on four-electrode impedance measurements, is proposed to measure the electrical resistance change when the gel is stretched or compressed. Experimental results show that the tested gels can be used as resistance force/pressure sensors with a quite linear behaviour.

scholarly journals Performance Analysis, Modelling, and Development of a Signal Conditioning Unit of N-Type Metal Oxide Gas Sensor for Acetone Gas Detection.

2021 ◽  
Author(s):  
ARUN K ◽  
LEKSHMI M S ◽  
SUJA K J
Keyword(s):  
Performance Analysis ◽  
Metal Oxide ◽  
Rate Of Change ◽  
Gas Detection ◽  
Signal Conditioning ◽  
Gas Concentration ◽  
Sensing Material ◽  
Acetone Gas Detection ◽  
Signal Conditioning Circuit ◽  
Conditioning Circuit

Abstract Metal oxide semiconductors have been widely used in the eld of gas sensor study. Various researches are being done to improve the sensitivity of the sensing material for applications like breath analyzers. In this work, a theoretical investigation and analysis of the n- type metal oxide for Acetone gas detection are carried out. The rate of change of resistance of the sensing material with respect to the change in the concentration of the target gas is analyzed. Acetone being a reducing gas the resistance was found to decrease for n-type material. The simulations were done using COMSOL Multiphysics and results showed that the resistance of the sensing layer varies with the concentration of the target gas. Also, the performance analysis of sensors has been compared with the experimental results. Further, we have also derived a mathematical expression connecting the relationship between the concentration of gas and the rate of change of resistance. The resistance change is observed to be proportional to the target gas concentration. A signal conditioning circuit was also designed for providing a user-friendly interface for monitoring the gas concentration. The simulation of the signal conditioning circuit was done using Proteus Design Suite. This work will aid researchers to define and predict the behaviour of gas sensors.

Self-Balancing Signal Conditioning Circuit for a Floating-Wiper Resistive Displacement Sensor

2018 ◽  
Vol 18 (18) ◽  
pp. 7544-7550 ◽  
Author(s):  
Aparna Mohan ◽  
Mohanasankar Sivaprakasam ◽  
Boby George ◽  
V. Jagadeesh Kumar
Keyword(s):  
Displacement Sensor ◽  
Signal Conditioning ◽  
Signal Conditioning Circuit ◽  
Conditioning Circuit

AN-Z2V: Autonulling-Based Multimode Signal Conditioning Circuit for R-C Sensors

2020 ◽  
Vol 69 (11) ◽  
pp. 8763-8772
Author(s):  
Shahid Malik ◽  
Meraj Ahmad ◽  
Laxmeesha Somappa ◽  
Tarikul Islam ◽  
Maryam Shojaei Baghini
Keyword(s):  
Signal Conditioning ◽  
Signal Conditioning Circuit ◽  
Conditioning Circuit

scholarly journals Highly Integrated MEMS Magnetic Sensor Based on GMI Effect of Amorphous Wire

Micromachines ◽  
2019 ◽  
Vol 10 (4) ◽  
pp. 237 ◽  
Author(s):  
Jiawen Chen ◽  
Jianhua Li ◽  
Lixin Xu
Keyword(s):  
Digital Signal ◽  
Magnetic Sensor ◽  
Amorphous Wire ◽  
Signal Conditioning ◽  
Current Frequency ◽  
Gmi Effect ◽  
Data Acquisition Card ◽  
Mems Technology ◽  
Signal Conditioning Circuit ◽  
Conditioning Circuit

In this paper, a highly integrated amorphous wire Giant magneto-impedance (GMI) magnetic sensor using micro electron mechanical system (MEMS) technology is designed, which is equipped with a signal conditioning circuit and uses a data acquisition card to convert the output signal of the circuit into a digital signal. The structure and package of the sensor are introduced. The sensor sensing principle and signal conditioning circuit are analyzed. The output of the sensor is tested, calibrated, and the relationship between the GMI effect of the amorphous wire and the excitation current frequency is explored. The sensor supplies voltage is ±5 V, and the excitation signal is a square wave signal with a frequency of 60 MHz and an amplitude of 1.2 V generated by the quartz crystal. The sensor has the largest GMI effect at 60 MHz with a sensitivity of 4.8 V/Oe and a resolution of 40 nT.

E-Nose: Multichannel Analog Signal Conditioning Circuit With Pattern Recognition for Explosive Sensing

2020 ◽  
Vol 20 (3) ◽  
pp. 1373-1382 ◽  
Author(s):  
Vijay S. Palaparthy ◽  
Shambhulingayya N. Doddapujar ◽  
Gaurav Gupta ◽  
Pallabi Das ◽  
Saurabh Arun Chandorkar ◽  
...  
Keyword(s):  
Pattern Recognition ◽  
Analog Signal ◽  
Signal Conditioning ◽  
Signal Conditioning Circuit ◽  
Explosive Sensing ◽  
Conditioning Circuit
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