Flexible, conductive, and highly pressure-sensitive graphene-polyimide foam for pressure sensor application

2018 ◽  
Vol 164 ◽  
pp. 187-194 ◽  
Author(s):  
Jiayi Yang ◽  
Yusheng Ye ◽  
Xiaoping Li ◽  
Xiaozhou Lü ◽  
Renjie Chen
Keyword(s):  
Pressure Sensor ◽  
Sensor Application ◽  
Pressure Sensitive

scholarly journals Single-Layer Pressure Textile Sensors with Woven Conductive Yarn Circuit

2020 ◽  
Vol 10 (8) ◽  
pp. 2877 ◽  
Author(s):  
Gaeul Kim ◽  
Chi Cuong Vu ◽  
Jooyong Kim
Keyword(s):  
Pressure Sensor ◽  
Pressure Sensors ◽  
Single Layer ◽  
Fast Response ◽  
Resistance Change ◽  
Load Pressure ◽  
Pressure Sensitive ◽  
High Durability ◽  
Textile Sensors ◽  
Conductive Fibers

Today, e-textiles have become a fundamental trend in wearable devices. Fabric pressure sensors, as a part of e-textiles, have also received much interest from many researchers all over the world. However, most of the pressure sensors are made of electronic fibers and composed of many layers, including an intermediate layer for sensing the pressure. This paper proposes the model of a single layer pressure sensor with electrodes and conductive fibers intertwined. The plan dimensions of the fabricated sensors are 14 x 14 mm, and the thickness is 0.4 mm. The whole area of the sensor is the pressure-sensitive point. As expected, results demonstrate an electrical resistance change from 283 Ω at the unload pressure to 158 Ω at the load pressure. Besides, sensors have a fast response time (50 ms) and small hysteresis (5.5%). The hysteresis will increase according to the pressure and loading distance, but the change of sensor loading distance is very small. Moreover, the single-layer pressure sensors also show high durability under many working cycles (20,000 cycles) or washing times (50 times). The single-layer pressure sensor is very thin and more flexible than the multi-layer pressure sensor. The structure of this sensor is also expected to bring great benefits to wearable technology in the future.

Flexible hemispheric microarrays of highly pressure-sensitive sensors based on breath figure method

Nanoscale ◽  
2018 ◽  
Vol 10 (22) ◽  
pp. 10691-10698 ◽  
Author(s):  
Zhihui Wang ◽  
Ling Zhang ◽  
Jin Liu ◽  
Hao Jiang ◽  
Chunzhong Li
Keyword(s):  
Pressure Sensor ◽  
Pressure Sensors ◽  
Pressure Sensing ◽  
Sensing Range ◽  
Pressure Sensitive ◽  
Breath Figure ◽  
Breath Figure Method ◽  
Flexible Pressure Sensors

Flexible pressure sensors with interlocked hemispheric microstructures are prepared by a novel breath figure strategy. The subtle microstructure remarkably improves the sensitivity and pressure sensing range of the pressure sensor.

A pressure-deformation analytical model for rectangular diaphragm of MEMS pressure sensors

2017 ◽  
Vol 31 (05) ◽  
pp. 1750046
Author(s):  
Wu Zhou ◽  
Dong Wang ◽  
Huijun Yu ◽  
Bei Peng
Keyword(s):  
Pressure Sensor ◽  
Applied Pressure ◽  
Influence Factors ◽  
Pressure Sensors ◽  
Superposition Method ◽  
Uniform Load ◽  
Pressure Sensitive ◽  
Partial Load ◽  
Mems Pressure Sensors ◽  
Measured Pressure

Rectangular diaphragm is commonly used as a pressure sensitive component in MEMS pressure sensors. Its deformation under applied pressure directly determines the performance of micro-devices, accurately acquiring the pressure–deflection relationship, therefore, plays a significant role in pressure sensor design. This paper analyzes the deflection of an isotropic rectangular diaphragm under combined effects of loads. The model is regarded as a clamped plate with full surface uniform load and partially uniform load applied on its opposite sides. The full surface uniform load stands for the external measured pressure. The partial load is used to approximate the opposite reaction of the silicon island which is planted on the diaphragm to amplify the deformation displacement, thus to improve the sensitivity of the pressure sensor. Superposition method is proposed to calculate the diaphragm deflections. This method considers separately the actions of loads applied on the simple supported plate and moments distributed on edges. Considering the boundary condition of all edges clamped, the moments are constructed to eliminate the boundary rotations caused by lateral load. The diaphragm’s deflection is computed by superposing deflections which produced by loads applied on the simple supported plate and moments distributed on edges. This method provides higher calculation accuracy than Galerkin variational method, and it is used to analyze the influence factors of the diaphragm’s deflection, includes aspect ratio, thickness and the applied force area of the diaphragm.

scholarly journals Manufacturing Graphene and Graphene-based Nanocomposite for Piezoelectric Pressure Sensor Application: A Review

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Musaab Khudhur Mohammed ◽  
Amer Al-Nafiey ◽  
Ghaleb Al-Dahash
Keyword(s):  
Pressure Sensor ◽  
Sensor Application ◽  
Piezoelectric Pressure Sensor

A resonant high-pressure sensor based on dual cavities

2021 ◽  
Vol 31 (12) ◽  
pp. 124002
Author(s):  
Jie Yu ◽  
Yulan Lu ◽  
Deyong Chen ◽  
Junbo Wang ◽  
Jian Chen ◽  
...  
Keyword(s):  
High Pressure ◽  
Temperature Sensitivity ◽  
Pressure Sensor ◽  
Pressure Range ◽  
High Vacuum ◽  
Pressure Sensors ◽  
Anodic Bonding ◽  
Temperature Range ◽  
Pressure Sensitive ◽  
Ocean Sciences

Abstract High-pressure sensors enable expansive demands in ocean sciences, industrial controls, and oil explorations. Successful sensor realized in piezoresistive high-pressure sensors which suffer from the key issue of compromised accuracies due to serious temperature drifts. Herein, this paper presents a high accuracy resonant high-pressure sensor with the pressure range of 70 MPa. Different from conventional resonant high-pressure sensor, the developed sensor utilized a dual-resonator-cavity design to minimize temperature disturbances and improve the pressure sensitivities. Besides, four circle cavities were used to maintain a high vacuum level for resonators after anodic bonding process. In details, Dual resonators, which is parallelly placed in the tensile and compressive stresses areas of a rectangular pressure sensitive diaphragm, are separated vacuum-packaged in the parallel dual cavities. Thus, pressure under measurement bends the pressure sensitive diaphragm, producing an increased pressure sensitivity and a decreased temperature sensitivity by the differential outputs of the dual resonators. Parameterized mathematical models of the sensor were established and the parameters of the models were optimized to adjust the pressure sensitivities and the temperature sensitivities of the sensor. Simplified deep reactive ion etching was used to form the sensing structure of the sensor and only once anodic bonding was used to form vacuum packaging for the dual resonators. Experimental results confirmed that the Q values of the resonators were higher than 32 000. Besides, the temperature sensitivity of the sensor was reduced from 44 Hz °C−1 (494 ppm °C−1) to 1 Hz °C−1 (11 ppm °C−1) by the differential outputs of the dual resonators in the temperature range of −10 °C–60 °C under the pressure of 1000 kPa. In addition, the accuracy of the sensor was better than 0.02% FS within the pressure range of 110–6500 kPa and the temperature range of −10 °C–60 °C by using a polynomial algorithm.

scholarly journals A new method to assess long‐term sea‐bottom vertical displacement in shallow water using a bottom pressure sensor: Application to Campi Flegrei, Southern Italy

2016 ◽  
Vol 121 (11) ◽  
pp. 7775-7789 ◽  
Author(s):  
Francesco Chierici ◽  
Giovanni Iannaccone ◽  
Luca Pignagnoli ◽  
Sergio Guardato ◽  
Marina Locritani ◽  
...  
Keyword(s):  
Shallow Water ◽  
Pressure Sensor ◽  
Southern Italy ◽  
Vertical Displacement ◽  
New Method ◽  
Campi Flegrei ◽  
Bottom Pressure ◽  
Sensor Application ◽  
Sea Bottom

Study of porous silicon, silicon carbide and DLC coated field emitters for pressure sensor application

2001 ◽  
Vol 45 (6) ◽  
pp. 997-1001 ◽  
Author(s):  
Irina Kleps ◽  
Anca Angelescu ◽  
Narcis Samfirescu ◽  
Adriana Gil ◽  
Antonio Correia
Keyword(s):  
Silicon Carbide ◽  
Porous Silicon ◽  
Pressure Sensor ◽  
Sensor Application ◽  
Field Emitters ◽  
Silicon Silicon

Polyisoprene-nanostructured carbon composite – A soft alternative for pressure sensor application

2011 ◽  
Vol 171 (1) ◽  
pp. 38-42 ◽  
Author(s):  
Juris Zavickis ◽  
Maris Knite ◽  
Gatis Podins ◽  
Artis Linarts ◽  
Raimonds Orlovs
Keyword(s):  
Pressure Sensor ◽  
Carbon Composite ◽  
Nanostructured Carbon ◽  
Sensor Application

Simple dispersion of graphene incorporated rubber composite for resistive pressure sensor application

2021 ◽  
Author(s):  
Ab Rahman Marlinda ◽  
Nurul Hazierah Kamaruddin ◽  
Abd Wahab Fadilah ◽  
Mardhiah Said ◽  
Nor Aliya Hamizi ◽  
...  
Keyword(s):  
Pressure Sensor ◽  
Sensor Application ◽  
Rubber Composite

Design Strategy for Porous Composites Aimed at Pressure Sensor Application

Small ◽  
2019 ◽  
Vol 15 (45) ◽  
pp. 1903487 ◽  
Author(s):  
Zhen Sang ◽  
Kai Ke ◽  
Ica Manas‐Zloczower
Keyword(s):  
Pressure Sensor ◽  
Design Strategy ◽  
Sensor Application ◽  
Porous Composites
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