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25th IEEE Instrumentation and Measurement Technology Conference

作者： Holtzman, M. Arcelus, A. Veledar, I. Goubran, R. Sveistrup, H. Guitard, P. Carleton Univ Dept Syst & Comp Engn 1125 Colonel Dr Ottawa ON K1S 5B6 Canada Univ Ottawa Sch Rehabil Sci Ottawa ON K1H 8M5 Canada

ISBN: (纸本)9781424415403

Embedding pressure sensors into household fixtures enables unobtrusive occupant health and safety monitoring at home. To monitor bathroom grab bar use, the force applied to a grab bar is desired from the output of three embedded pressure sensors. We examine the measurement of applied force in a non-uniform pressure sensor array, where forces are distributed with spatial nonlinearity to the pressure sensors. Two methods that ignore the spatial nonlinearities are compared to two methods that incorporate them. These include a polynomial response curve, a theoretical model, a lookup table, and an artificial neural network. When many calibration points can be taken and location estimates are accurate, the location-based lookup table presented the lowest error. However when calibration time is limited, the theoretical model performs best, while an artificial neural network is preferred when location inputs are inaccurate.

关键词： pressure sensor array nonlinear signal processing calibration intelligent sensors smart homes

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Vehicle Pose Estimation System Base on pressure sensor array for Clamping Parking Robot 18

Vehicle Pose Estimation System Base on Pressure Sensor Array...

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IEEE International Conference on Mechatronics and Automation (IEEE ICMA)

作者： Zhang, Juzhong Chu, Yuyi Wang, Zhisen Ye, Tingfeng Cai, Liming Yang, Hongbo Chinese Acad Sci Suzhou Inst Biomed Engn & Technol Suzhou Jiangsu Peoples R China Chinese Acad Sci Changchun Inst Opt Fine Mech & Phys Changchun Jilin Peoples R China

ISBN: (纸本)9781665441018

Vehicle pose estimation is one of the most essential functions for the clamping parking robot. In order to detect the parameter information of a car accurately, laser scanners are used widely for their highly precise distance measurements. However, the price of laser scanners, especially 3D laser scanners, is usually very expensive, and the pose estimating algorithm is complex. In this paper, an innovative vehicle pose estimation system based on pressure sensor array is proposed. In order to improve the estimation accuracy, a rectangle fitting based on the least square method are applied. The suggested algorithm is simple and effective, it can not only estimate the pose of a car, but also achieve the parameters of wheel width, wheel tread, wheel base, weight and gravity center position. In addition, whether the steering wheel is back can also be detected. All the information above is important for clamping parking robot. What is more, it's much cheaper than laser scanners. In order to verify the algorithm, two experiment prototypes were built. The results proved that the proposed system provides an effective method of vehicle pose estimation for clamping parking robot.

关键词： Pose estimation Parking robot Laser scanner pressure sensor array

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The silver-coated sponge spacer and multiwalled carbon nanotube- dragon skin electrodes for cushion-type nanocomposite pressure sensor array

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sensorS AND ACTUATORS A-PHYSICAL 2022年 335卷

作者： Bae, Seonghyun Benny, Aby Paul Kim, Seonghee Hwang, Ji Hye Baik, Seunghyun Sungkyunkwan Univ Sch Mech Engn Suwon 16419 South Korea Sungkyunkwan Univ Dept Energy Sci Suwon 16419 South Korea Sungkyunkwan Univ Med Res Inst Sch Med Suwon 16419 South Korea Sungkyunkwan Univ Sch Med Suwon 16419 South Korea Samsung Med Ctr Dept Phys & Rehabil Med Seoul 06351 South Korea

Prolonged sitting in an unhealthy posture can cause various health ailments. Especially, wheelchair users and office workers suffer from pressure ulcer and chronic back pain. Here we report a cushion-type 20 x 20 pressure sensor array made by the low-cost simple scalable method. The soft electrode is made of multi walled carbon nanotubes and dragon skin matrix. The resistance of the electrode is dramatically decreased by the insertion of a copper wire. The silver-coated polyurethane sponge provides the piezoresistive sensing mechanism and significantly improves the sensor response. The continuous sensing range (0-70 kPa) is sufficient for sitting posture analysis, and the sensitivity is as high as 0.10 kPa-1 in the range of 0-10 kPa. The signal is processed using a single board microcontroller, and data are transmitted to a mobile device wirelessly. The sequential voltage supply and signal read minimize the number of voltage supply and analog-to-digital conversion ports in the microcontroller, and a modified conductance matrix algorithm is designed to completely eliminate crosstalk effect of the sensor array. The pressure sensor successfully recognizes various sitting postures, including optimal and left/right/forward leaning, and may find immediate rehabilitation and health care applications.(c) 2022 Elsevier B.V. All rights reserved.

关键词： Silver-coated sponge Nanocomposite pressure sensor array Crosstalk Modified conductance matrix algorithm Sitting posture analysis

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The relative perception system of underwater bionic vehicles based on the artificial lateral line pressure sensor array

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FLOW MEASUREMENT AND INSTRUMENTATION 2023年 93卷

作者： Liu, Yu Hu, Qiao Yang, Qian Fu, Tongqiang Li, Sihu Xi An Jiao Tong Univ Sch Mech Engn Xian Peoples R China Xi An Jiao Tong Univ Shaanxi Key Lab Intelligent Robots Xian Peoples R China

The lateral line system (LLS) is a unique sensing organ of fish. With the help of LLS, fish can communicate and school underwater based on the flow field information even in darkness. Inspired by the LLS, an artificial lateral line system (ALLS) mounted on the bionic vehicle was proposed in this paper to facilitate the research of bionic vehicle mutual perception. Specifically, the proposed ALLS was expected to find out the variation of pressure signals of the carrier vehicle during swimming alone or with others. Accordingly, the pressure distribution and transition of vortex streets generated by the oscillation of the bionic tail fin could be revealed. Firstly, the computational fluid dynamics (CFD) simulation was adopted to obtain the relationship between the ALLS pressure signal and the bionic vehicle swimming state when the vehicle was swimming alone. In this case, the swimming state involved the swimming velocity, the bionic tail oscillation frequency, and the bionic tail oscillation amplitude. Next, the ALLS pressure signal variation was captured when the ALLS carrier vehicle was swimming behind a leader bionic vehicle synchronously. The signal diversity between the two cases was explored. Lastly, the hardware of the bionic vehicle and the experiment platform were established to further compare the ALLS pressure signals of the bionic vehicle in both the cases of swimming alone and swimming together with a leader. The empirical mode decomposition (EMD) and back propagation neural network (BPNN) methods were adopted to extract features and distinguish the motion state of the vehicle based on the experiment platform. The feasibility and efficiency of the ALLS to perceive the motion of the carrier vehicle and the leader vehicle were validated in the simulation and experiment results. The conclusion of this paper should show a new promising inter-perception way for the underwater bionic vehicle cluster.

关键词： Artificial lateral line pressure sensor array Bionic vehicle Robotic fish

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An ionic pressure sensor array with digitizable sensitivity

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JOURNAL OF MICROMECHANICS AND MICROENGINEERING 2023年第5期33卷 055005-055005页

作者： Zou, Qiang Liu, Chenyu Su, Qi Xue, Tao Tianjin Univ Tianjin Int Joint Res Ctr Internet Things Sch Microelect Tianjin Key Lab Imaging & Sensing Microelect Techn Tianjin 300072 Peoples R China Tianjin Univ Anal & Testing Ctr Tianjin 300072 Peoples R China

Flexible pressure sensors play an indispensable role in electronic skin. A flexible pressure sensor array with a larger sensing area is an inevitable trend for further developing a single flexible pressure sensor. However, pressure sensor arrays suffer from a key challenge: each sensing unit in the array cannot be individually defined for its pressure sensing range and sensitivity. Here, we present an ionic pressure sensor array with digitizable sensitivity achieved through the synergistic cooperation of an ion gel shell interfacial capacitive sensing mechanism and a filler with digitally tunable mechanical stiffness. Through this design, the sensitivity of each sensing pixel unit in the array can be digitally defined in the range of 20 times, and the fabrication process is greatly simplified. We fabricated sensor arrays for object contour recognition and weight judgment, demonstrating their potential application in electronic skin. In addition, we proposed using a customized 3D printer of elastomer to simplify its fabrication process, which is beneficial for engineering applications.

关键词： pressure sensor array digitizable sensitivity capacitance response ion gel electrical double layer

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A hypersensitive pressure sensor array for phase change microfluidics analysis

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sensorS AND ACTUATORS A-PHYSICAL 2024年 372卷

作者： Biancone, Chris J. Huang, Tzu-Jung Shukla, Maharshi Y. Kandlikar, Satish G. Puchades, Ivan Rochester Inst Technol Elect & Microelect Engn 76 Lomb Mem Dr Rochester NY 14623 USA Rochester Inst Technol Microsyst Engn 76 Lomb Mem Dr Rochester NY 14623 USA Rochester Inst Technol Mech Engn 76 Lomb Mem Dr Rochester NY 14623 USA

This work presents for the first time an innovative solution for measuring small pressure changes as a pressure front moves along a surface at the micro-scale, targeting applications in microfluidics. Pump-less flow boiling is an attractive method of improving heat removal from electronic devices for its lack of additional pump and the efficiency gained from phase-change cooling over conventional pumped single-phase cooling. Efforts to characterize the mechanisms of boiling at the micro-scale to effect pump-less flow has primarily focused on taking pressure measurements at the entry and exit of the channel, not within it, limiting the ability of current computer models to scale this technology. A pressure sensor array designed to operate in boiling conductive fluids is proposed in this paper to create a map of the pressure front on channel surfaces from nucleating gasphase bubbles within a tapered micro-gap. 8 200 mm piezoresistive transducers are fabricated on a 0 . 9 mm by 20 mm chip using a novel hybrid bulk- and surface-micromachining process to create 240 nm thick diaphragms targeting a 1 mu V output for 20 Pa of applied pressure, or a sensitivity of 50 nV Pa -1 . Characterization of the fabricated devices yields a sensitivity of 155 nV Pa -1 with R 2 = 0.90 at 5 V input, and a high correlation with the diaphragm's physical deformation.

关键词： MEMS Piezoresistance pressure sensor array Microfluidics Flow boiling

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A Flexible and Highly Sensitive Inductive pressure sensor array Based on Ferrite Films

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sensorS 2019年第10期19卷 2406页

作者： Tang, Xinran Miao, Yihui Chen, Xinjian Nie, Baoqing Soochow Univ Sch Elect & Informat Engn Suzhou 215006 Peoples R China Soochow Univ State Key Lab Radiat Med & Protect Suzhou 215123 Peoples R China

There is a rapid growing demand for highly sensitive, easy adaptive and low-cost pressure sensing solutions in the fields of health monitoring, wearable electronics and home care. Here, we report a novel flexible inductive pressure sensor array with ultrahigh sensitivity and a simple construction, for large-area contact pressure measurements. In general, the device consists of three layers: a planar spiral inductor layer and ferrite film units attached on a polyethylene terephthalate (PET) membrane, which are separated by an array of elastic pillars. Importantly, by introducing the ferrite film with an excellent magnetic permeability, the effective permeability around the inductor is greatly influenced by the separation distance between the inductor and the ferrite film. As a result, the value of the inductance changes largely as the separation distance varies as an external load applies. Our device has achieved an ultrahigh sensitivity of 1.60 kPa(-1) with a resolution of 13.61 Pa in the pressure range of 0-0.18 kPa, which is comparable to the current state-of-the-art flexible pressure sensors. More remarkably, our device shows an outstanding stability when exposed to environmental interferences, e.g., electrical noises from skin surfaces (within 0.08% variations) and a constant pressure load for more than 32 h (within 0.3% variations). In addition, the device exhibits a fast response time of 111 ms and a good repeatability under cyclic pressures varying from 38.45 to 177.82 Pa. To demonstrate its practical usage, we have successfully developed a 4 x 4 inductive pressure sensor array into a wearable keyboard for a smart electronic calendar application.

关键词： flexible electronics inductive sensing pressure sensor array wearable device

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A Compressed Sensing Based Method for Reducing the Sampling Time of A High Resolution pressure sensor array System

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sensorS 2017年第8期17卷 1848页

作者： Sun, Chenglu Li, Wei Chen, Wei Fudan Univ Sch Informat Sci & Technol Dept Elect Engn Ctr Intelligent Med Elect Shanghai 200433 Peoples R China Shanghai Key Lab Med Imaging Comp & Comp Assisted Shanghai 200000 Peoples R China

For extracting the pressure distribution image and respiratory waveform unobtrusively and comfortably, we proposed a smart mat which utilized a flexible pressure sensor array, printed electrodes and novel soft seven-layer structure to monitor those physiological information. However, in order to obtain high-resolution pressure distribution and more accurate respiratory waveform, it needs more time to acquire the pressure signal of all the pressure sensors embedded in the smart mat. In order to reduce the sampling time while keeping the same resolution and accuracy, a novel method based on compressed sensing (CS) theory was proposed. By utilizing the CS based method, 40% of the sampling time can be decreased by means of acquiring nearly one-third of original sampling points. Then several experiments were carried out to validate the performance of the CS based method. While less than one-third of original sampling points were measured, the correlation degree coefficient between reconstructed respiratory waveform and original waveform can achieve 0.9078, and the accuracy of the respiratory rate (RR) extracted from the reconstructed respiratory waveform can reach 95.54%. The experimental results demonstrated that the novel method can fit the high resolution smart mat system and be a viable option for reducing the sampling time of the pressure sensor array.

关键词： noninvasive monitoring respiratory rate monitoring pressure distribution imaging compressed sensing pressure sensor array

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A Novel Micro-pressure Graphene sensor array With Double-Layer Mesh Structure

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IEEE sensorS JOURNAL 2022年第3期22卷 1964-1971页

作者： Zhao, Cheng Zhou, Jiacheng Yuan, Shuya Ren, Qingying Wang, Debo Nanjing Univ Posts & Telecommun Coll Elect & Opt Engn Nanjing 210023 Peoples R China Nanjing Univ Posts & Telecommun Coll Microelect Nanjing 210023 Peoples R China

In this work, a novel micro-pressure graphene sensor array with double-layer mesh structure is designed in order to effectively realize the multi-point measurement of micro-pressure. A 4 x 4 sensor array could form 16 pressure-sensing pixels with good multi-point measurement capability. The double-layer mesh graphene with interconnected porous microstructure is fabricated with a cheap and convenient laser direct writing (LDW) technique. Based on the excellent microstructure and the double-layer mesh structure, this graphene pressure sensor array demonstrates high sensitivity in the low-pressure range (0.339 kPa(-1), < 200 Pa), ultra-fast response time (< 30 ms), and prominent repeatability (>200 cycles), which meets the requirements of micro-pressure measurement. In addition, a full-automatic micro-pressure demodulation system equipped with human-computer interaction interface is designed to realize the two-dimensional shape recognition. Therefore, it could open broad applications in the fields of micro-pressure measurement, two-dimensional shape recognition and wearable electronic devices.

关键词： pressure sensor array double-layer mesh structure laser direct writing shape recognition

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Calibration of pressure sensor array Based on Information Fusion

Calibration of Pressure Sensor Array Based on Information Fu...

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The 2011 International Conference on Electric and Electronics(EEIC 2011)

作者： Bing Guo Xiaohong Zeng Chongqing Technology and Business Institute Chongqing College of Electronic Engineering

It is existence of cross-sensitivity factors such as the temperature, humidity and power fluctuations in pressure sensor array. To solve this problem, it is proposed an information fusion based on the pressure sensor array calibration algorithm. By this method can effectively eliminate the environmental temperature and voltage disturbances and other non-target parameters, and crosstalk between large-scale sensor array signal output of pressure sensor array characteristics. It is improved system stability and reliability. Experimental results show that the information fusion processing algorithms realize the precise calibration of the pressure sensor array, the effective sensor array measurement data to ensure the accuracy and reliability of the results.

关键词： pressure sensor array Information Fusion Calibration

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