Development of two-dimensional piezoelectric laser scanner with large steering angle and fast response characteristics

2019 ◽  
Vol 90 (6) ◽  
pp. 065004 ◽  
Author(s):  
Ho-Sang Kim ◽  
Dae-Hee Lee ◽  
Deog Jae Hur ◽  
Dong-Chan Lee
Keyword(s):  
Laser Scanner ◽  
Fast Response ◽  
Two Dimensional ◽  
Steering Angle ◽  
Response Characteristics

Development of a dual-stage and visual-servo filming robot

2021 ◽  
pp. 095965182199136
Author(s):  
Liang-Chien Liu ◽  
Ping-Han Yang ◽  
Shih-Chi Liao ◽  
Bing-Peng Li ◽  
Fu-Cheng Wang ◽  
...  
Keyword(s):  
Fast Response ◽  
Tracking Performance ◽  
Visual Servo ◽  
Response Characteristics ◽  
Lower Stage ◽  
Upper Stage ◽  
Dual Stage ◽  
Switching Controller ◽  
Similar Evaluation ◽  
Better Than

This article presents the development of a visual-servo filming robot for dolly & truck style camera movement in filming applications. The robot was implemented with a fast-response slider as the upper stage on top of the slow-response tracked robot body as the lower stage, to improve target tracking performance. A new switching controller was developed, which controlled the stages’ motions by balancing and adjusting the weights of vision error and slider’s noncentering error of the upper stage, thus achieving tracking performance better than the traditional master–slave control strategy. The simulations were carried out to evaluate the tracking performance of the model, particularly focusing on evaluating how the dual stage improves the overall response of the model. The similar evaluation was executed experimentally as well. Both results confirm that the fast-response characteristics of the upper stage can compensate the slow dynamics of lower stage, the tracked robot which is inevitably heavy due to its composition.

Two-dimensional SnS2 materials as high-performance NO2 sensors with fast response and high sensitivity

2018 ◽  
Vol 255 ◽  
pp. 616-621 ◽  
Author(s):  
Young-Ho Kim ◽  
Duy-Thach Phan ◽  
Seungbae Ahn ◽  
Ki-Hun Nam ◽  
Cheol-Min Park ◽  
...  
Keyword(s):  
High Performance ◽  
High Sensitivity ◽  
Fast Response ◽  
Two Dimensional

A two-dimensional laser-scanner system for geotechnical processes monitoring

2018 ◽  
pp. 865-870 ◽  
Author(s):  
M.D. Valencia-Galindo ◽  
L.N. Beltrán-Rodriguez ◽  
J.A. Sánchez-Peralta ◽  
J.S. Tituaña-Puente ◽  
M.G. Trujillo-Vela ◽  
...  
Keyword(s):  
Laser Scanner ◽  
Two Dimensional

scholarly journals Fast response photogating in monolayer MoS2 phototransistors

Nanoscale ◽  
2021 ◽  
Author(s):  
Daniel Vaquero ◽  
Vito Clericò ◽  
Juan Salvador-Sanchez ◽  
Elena Díaz ◽  
Francisco Dominguez-Adame ◽  
...  
Keyword(s):  
Transition Metal ◽  
Fast Response ◽  
Transition Metal Dichalcogenide ◽  
Two Dimensional ◽  
Monolayer Mos2 ◽  
Intensive Research

Two-dimensional transition metal dichalcogenide (TMD) phototransistors have been object of intensive research during the last years due to their potential for photodetection. Photoresponse in these devices is typically caused by...

scholarly journals Cellulose Nanopaper Cross-Linked Amino Graphene/Polyaniline Sensors to Detect CO2 Gas at Room Temperature

Sensors ◽  
2019 ◽  
Vol 19 (23) ◽  
pp. 5215 ◽  
Author(s):  
Hanan Abdali ◽  
Bentolhoda Heli ◽  
Abdellah Ajji
Keyword(s):  
Bacterial Cellulose ◽  
Room Temperature ◽  
Morphological Structure ◽  
High Sensitivity ◽  
Fast Response ◽  
Aniline Monomer ◽  
Resistance Response ◽  
Covalent Interaction ◽  
Response Characteristics ◽  
Carbon Dioxide Co2

A nanocomposite of cross-linked bacterial cellulose–amino graphene/polyaniline (CLBC-AmG/PANI) was synthesized by covalent interaction of amino-functionalized graphene (AmG) AmG and bacterial cellulose (BC) via one step esterification, and then the aniline monomer was grown on the surface of CLBC-AmG through in situ chemical polymerization. The morphological structure and properties of the samples were characterized by using scanning electron microscopy (SEM), and thermal gravimetric analyzer (TGA). The CLBC-AmG/PANI showed good electrical-resistance response toward carbon dioxide (CO2) at room temperature, compared to the BC/PANI nanopaper composites. The CLBC-AmG/PANI sensor possesses high sensitivity and fast response characteristics over CO2 concentrations ranging from 50 to 2000 ppm. This process presents an extremely suitable candidate for developing novel nanomaterials sensors owing to easy fabrication and efficient sensing performance.

Research on a Novel Two-Phase Hybrid Stepping Motor

2011 ◽  
Vol 121-126 ◽  
pp. 4122-4126
Author(s):  
Yong Kui Man ◽  
Yu Yan Ma ◽  
Yu Shuang Zhao ◽  
Chang Cheng Xu ◽  
Wen Sheng Hao
Keyword(s):  
Fast Response ◽  
Control Mode ◽  
Stepping Motor ◽  
Two Phase ◽  
Motor Torque ◽  
Response Characteristics ◽  
Torque Vector ◽  
Hybrid Stepping Motor ◽  
Motor Operation ◽  
And Control

In this paper, the mechanical structure of a novel two-phase hybrid stepping motor, which offers big transmission ratio and fast response characteristics, is proposed. Comparing with typical two-phase hybrid stepping motor, permanent magnet of the new model is placed on the stator, thus it has better utilization of space than conventional two-phase hybrid stepping motor. Furthermore, new two-phase hybrid stepping motor torque mathematical model is established. And the two-phase hybrid stepping motor torque vector analysis method we provide here provide you with an intuitive way of research on the new type two-phase hybrid stepping motor operation principle and control mode.

A study of fast response characteristics for hydrogen sensing with platinum FET sensor

2006 ◽  
Vol 114 (1) ◽  
pp. 158-163 ◽  
Author(s):  
K. Tsukada ◽  
T. Kiwa ◽  
T. Yamaguchi ◽  
S. Migitaka ◽  
Y. Goto ◽  
...  
Keyword(s):  
Fast Response ◽  
Response Characteristics ◽  
Hydrogen Sensing

Two-dimensional a-Si:H/a-SiC:H n-i-p sensor array with ITO/a-SiNx antireflection coating

2005 ◽  
Vol 862 ◽  
Author(s):  
Yu. Vygranenko ◽  
J. H. Chang ◽  
A. Nathan
Keyword(s):  
Reverse Bias ◽  
Spectral Response ◽  
Charge Trapping ◽  
Optical Excitation ◽  
Antireflection Coating ◽  
Two Dimensional ◽  
Device Structure ◽  
Response Characteristics ◽  
Photodiode Array

AbstractThis paper presents a two-dimensional a–Si:H/a-SiC:H n–i–p photodiode array with switching diode readout, developed specifically for fluorescence-based bio-assays. Both device structure and fabrication processing has enabled enhancement of the external quantum efficiency of the encapsulated device up to 80%, reduction of the photodiode leakage down to 10 pA/cm2 at -1V reverse bias, and increase of the rectification current ratio of the switching diodes up to 109. The critical fabrication issues associated with deposition of device-quality materials, tailoring of defects at the i–p interface, device patterning with dry etching, junction passivation, and contact formation will be discussed. Both sensing and switching diodes were characterized. While the observed dark current in the photodiodes at low reverse bias voltages is primarily due to carrier emission from deep states in the a–Si:H bulk, the leakage in the small switching diodes stems from peripheral defects along junction sidewalls. Optical losses in the photodiodes with ITO/a–SiNx:H antireflection coating were evaluated using numerical modeling, and the calculated transmission spectra correlated well with the spectral response characteristics. Measurements of the charge transfer time and output linearity demonstrated the efficiency of the single-switching diode readout configuration. The response of the array to optical excitation was also investigated. The observed long term retardation in the signal rise and decay at illumination levels less than 1010 photons/cm2-s can be associated with charge trapping in the undoped layer.

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