scholarly journals A High-Temperature Piezoresistive Pressure Sensor with an Integrated Signal-Conditioning Circuit

Sensors ◽  
2016 ◽  
Vol 16 (6) ◽  
pp. 913 ◽  
Author(s):  
Zong Yao ◽  
Ting Liang ◽  
Pinggang Jia ◽  
Yingping Hong ◽  
Lei Qi ◽  
...  
Keyword(s):  
High Temperature ◽  
Pressure Sensor ◽  
Signal Conditioning ◽  
Piezoresistive Pressure Sensor ◽  
Signal Conditioning Circuit ◽  
Conditioning Circuit

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.

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