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Optimal Design of angular displacement sensor with Shared Magnetic Field Based on the Magnetic Equivalent Loop Method

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sensorS 2019年第9期19卷 2207.-2207.页

作者： Luo, Pinggui Tang, Qifu Jing, Huan Chongqing Univ Technol Engn Res Ctr Mech Testing Technol & Equipment Minist Educ Chongqing 400054 Peoples R China

angular displacement sensor with shared magnetic field has strong environmental adaptability and high measurement accuracy. However, its 3-D structure is multi-pole double-layer structure, using time stepping finite element method (TSFEM) to optimize the structure is time-consuming and uneconomical. Therefore, a magnetic equivalent loop method (MELM) is proposed to simplify the optimal design of sensors. By reasonably setting the node position, the mechanical structure parameters, winding coefficients and input voltage of the sensor are integrated into a mathematical model to calculate of the induced voltage. The calculation results are compared with the simulation results, and a sensor prototype is made to test the optimized effect of the MELM.

关键词： angular displacement sensor magnetic equivalent loop method (MELM) optimal design

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angular displacement sensor Based on Coplanar Waveguide (CPWs) Loaded with S-Shaped Golden Spiral-Tapered Split Ring Resonators (SGS-SRRs)

Angular Displacement Sensor Based on Coplanar Waveguide (CPW...

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International Electrical Engineering Congress (iEECON)

作者： Harnsoongnoen, Supakorn Angkawisittpan, Niwat Mahasarakham Univ Fac Sci Dept Phys Computat & Expt Magnetism Res Unit Mueang Maha Sarakham Dis 44150 Maha Sarakham Thailand Mahasarakham Univ Fac Engn Res Unit Computat Electromagnet & Opt Syst CEMOS Mueang Maha Sarakham Dis 44150 Maha Sarakham Thailand

An angular displacement sensor based on coplanar waveguides (CPWs) loaded with s-shaped golden spiral-tapered split ring resonators (SGS-SRRs) is proposed in this paper. The proposed device is composed of a CPW and a SGS-SRR which was designed based on the golden ratio number and etching on double copper layer of PCB. The transmission coefficient (S-21), linearity and sensitivity of the sensor were simulated and analyzed using electromagnetic models. The results show that the sensor was able to sense the rotation angle. It has a wide dynamic range, high linearity, higher sensitivity and lower cost, which is particularly suitable for use as a sensor and transducer technology in the future. (C) 2016 The Authors. Published by Elsevier B.V.

关键词： angular displacement sensor Coplanar waveguide Golden ratio S-shaped Golden spiral-tapered split ring resonators

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angular displacement sensor Based on Coplanar Waveguide (CPWs) Loaded with S-Shaped Golden Spiral-Tapered Split Ring Resonators (SGS-SRRs)

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Procedia Computer Science 2016年 86卷 75-78页

作者： Supakorn Harnsoongnoen Niwat Angkawisittpan The Computational and Experimental Magnetism Research Unit Department of Physics Faculty of Science Mahasarakham University Thailand 44150 Research Unit for Computational Electromagnetics and Optical Systems (CEMOS) Faculty of Engineering Mahasarakham University Thailand 44150

An angular displacement sensor based on coplanar waveguides (CPWs) loaded with s-shaped golden spiral-tapered split ring resonators (SGS-SRRs) is proposed in this paper. The proposed device is composed of a CPW and a SGS-SRR which was designed based on the golden ratio number and etching on double copper layer of PCB. The transmission coefficient (S 21 ), linearity and sensitivity of the sensor were simulated and analyzed using electromagnetic models. The results show that the sensor was able to sense the rotation angle. It has a wide dynamic range, high linearity, higher sensitivity and lower cost, which is particularly suitable for use as a sensor and transducer technology in the future.

关键词： angular displacement sensor Coplanar waveguide Golden ratio S-shaped Golden spiral-tapered split ring resonators

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A Differential Reflective Intensity Optical Fiber angular displacement sensor

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sensorS 2016年第9期16卷 1508-1508页

作者： Jia, Binghui He, Lei Yan, Guodong Feng, Yong Nanjing Inst Technol Sch Mech Engn Nanjing 211167 Jiangsu Peoples R China Changan Univ Key Lab Rd Construct Technol & Equipment Xian 710064 Peoples R China

In this paper, a novel differential reflective intensity optical fiber angular displacement sensor was proposed. This sensor can directly measure the angular and axial linear displacement of a flat surface. The structure of the sensor probe is simple and its basic principle was first analyzed according to the intensity modulation mechanisms. Secondly, in order to trim the dark output voltage to zero, the photoelectric conversion circuit was developed to adjust the signals. Then, the sensor model including the photoelectric conversion circuit has been established, and the influence of design parameters on the sensor output characteristic has been simulated. Finally, the design parameters of the sensor structure were obtained based on the simulation results;and an experimental test system was built for the sensor calibration. Experimental results show that the linear angular range and the sensitivity of the sensor were 74.4 and 0.051 V/degrees, respectively. Its change rules confirm the operating principle of the sensor well.

关键词： angular displacement sensor differential calibration testing

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A low-cost reflection mode operated microwave resonator sensor for angular displacement detection

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JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS 2024年第15期38卷 1621-1634页

作者： Regalla, Premsai Kumar, A. V. Praveen BITS Pilani EEE Dept Pilani Campus Pilani 333031 Rajasthan India

A low-cost microwave resonator sensor for angular displacement detection is proposed. The sensor uses a strip-loaded dielectric resonator (SLDR) as the key element. The sensor operates in the reflection mode, i.e. by producing a variation in the reflection coefficient (S11) according to the angular position of the SLDR relative to a microstrip transmission line. The primary advantage of the proposed strategy is its fixed-frequency operation enabling the S11 measurement with a low-cost reflectometer, thereby avoiding the costly vector network analyzer (VNA). Design modelling and initial analysis of the sensor are performed with ANSYS HFSS software. To demonstrate proof of concept, a sensor prototype is fabricated and experimentally characterized with a custom-made reflectometer. Results are compared against VNA-based measurements to be in decent agreement. The proposed sensor exhibits 0.43 dB/0 sensitivity over the dynamic range of 00-900.

关键词： angular displacement sensor dielectric resonator fixed frequency sensor reflectometer vector network analyzer

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Sensitivity Comparison of Common Microwave Feeds to be Useful in angular displacement sensors

Sensitivity Comparison of Common Microwave Feeds to be Usefu...

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IEEE Microwaves, Antennas, and Propagation Conference (MAPCON)

作者： Regalla, Premsai Kumar, A. V. Praveen

ISBN: (纸本)9781665452038

In this work, the authors analyze the performance of dielectric resonator (DR) based angular displacement sensor with different feeding methods. It is demonstrated that, sensor characteristics like resonant frequency, impedance matching, sensitivity, and dynamic range are highly dependent on the selected feeding technique. The common microwave feeds such as the coaxial probe, slot line, microstrip line, and conformal microstrip line are considered for reflection mode operation. Standard commercial EM simulation tool ANSYS HFSS is used for performing the simulations. Analysis of the simulation results lead to proposing the microstrip line feed for realizing fixed-frequency DR based angular sensor which is experimentally validated.

关键词： angular displacement sensor microwave feeding techniques Reflection coefficient fixed-frequency sensor dielectric resonator

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Vertically Aligned Laser-Patterned Carbon Nanotube-Based Strain-Less sensor for Motion Detection

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IEEE sensorS JOURNAL 2024年第12期24卷 19220-19228页

作者： Sen, Supriti Mukherjee, Sarbojit Shivakiran Bhaktha, B. N. Jacob, Chacko Indian Inst Technol Kharagpur Ctr Mat Sci Kharagpur 721302 W Bengal India Indian Inst Technol Kharagpur Adv Technol Dev Ctr Kharagpur 721302 W Bengal India Indian Inst Technol Kharagpur Dept Phys Kharagpur 721302 W Bengal India

Carbon nanotubes (CNTs) have paved the way as a functional material in wearable motion sensors. Most of these flexible motion sensors are strain-based with their output response being electrical. This article reports the fabrication and implementation of laser-patterned vertically aligned CNT (VACNT)-based motion sensors that operate on the change in intensity of the transmitted light with angular displacement and is based on the concept of shadowing effect by the VACNTs. The sensing mechanism does not involve straining the sensor, ensuring its longevity. The sensor also exhibits versatility in sensor parameter tuning with the highest sensitivity of 25 mu m and a sensing range of +/- 40 degrees with negligible hysteresis being recorded for the sensors reported in this study. The sensor offers high accuracy, reliability, and precision. The influence of the design parameters, such as the height of the VACNT film and the dimension of the pattern, has been explored in this study. A prototype device has been 3-D printed for the VACNT-based sensor to monitor minute human wrist movements of speed as high as 160 degrees/s. The proposed sensor is suitable for real-time tracking of high-speed, small-scale, and large-scale movements with good reproducibility.

关键词： angular displacement sensor laser-patterned vertically aligned carbon nanotube (VACNT) strain-free motion sensor VACNT-based optical sensor

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A Multifunctional Encoder With Absolute and Incremental Angle Outputs

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IEEE sensorS JOURNAL 2023年第21期23卷 25864-25873页

作者： Kang, Jian Hao, Bin Su, Yuelong Zhao, Yitao Yan, Xianfeng Hao, Shuanghui Harbin Inst Technol Sch Mech Engn Lab Intelligent Equipment Technol Harbin 150001 Peoples R China Shanxi Mech & Elect Design & Res Inst Co Ltd Taiyuan 30009 Peoples R China

The angular displacement sensor is used widely in robotics and other application fields. This article proposes a new type of multifunctional angular displacement sensor. This angular displacement sensor design integrates two microcontroller units (MCUs) on a small printed circuit board (PCB). The first unit, which is designated MCU-A, transmits the absolute angle to the second unit, which is designated MCU-B, through serial peripheral interface (SPI) communication. In MCU-B, the absolute angle output is converted into incremental ABZ and UVW output using a table lookup angle conversion algorithm. The proposed encoder has various output types and a simple structure, is small in size, and can be manufactured at low cost. The device can be applied in a variety of industrial production scenarios.

关键词： Absolute output angular displacement sensor incremental output multifunctional device

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Development and verification of a novel blood viscoelastic monitoring method based on reciprocating motion of magnetic bead

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BIOMEDICAL ENGINEERING-BIOMEDIZINISCHE TECHNIK 2023年第2期68卷 211-223页

作者： Du, Xinyu Chen, Fupan Gan, Lijin Liu, Yong Zheng, Yu Xing, Linghua Zhou, Qi Chongqing Univ Technol Dept Pharm & Bioengn Chongqing Peoples R China Chongqing Univ Technol Dept Pharm & Bioengn Chongqing Peoples R China Anjian Technol Chongqing Co Ltd Chongqing Peoples R China Chongqing Nanfang Numer Control Equipment Co Ltd Chongqing Peoples R China

Blood coagulation function is an essential index in clinical examination, and it is of great significance to evaluate blood coagulation function comprehensively. Based on the blood viscoelasticity theory and hydrodynamics, we proposed a method to monitor the whole blood coagulation process based on the reciprocating motion of the magnetic bead (magnetic bead method for short). We have established a mathematical model between the moment acting on the magnetic bead and the viscoelasticity of blood in the process of blood coagulation. The change of blood viscoelasticity acks on the magnetic bead in the form of moment changes, which shows that the amplitude of the motion of the magnetic bead varies with the change of blood viscoelasticity. Designed and verified a blood coagulation monitoring device based on the reciprocating movement of the magnetic bead and discussed the device's parameters through the orthogonal experiment. Lastly, the TEG5000 was used as the control group to test the thromboelasticity of four groups of thromboelastography quality control products in the same batch and 10 groups of human whole blood. It verified that our device has good repeatability, and has good consistency with TEG5000, it has particular application potential as a new blood coagulation monitoring method.

关键词： angular displacement sensor magnetic bead method TEG5000 thromboelastography whole blood coagulation

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A Highly Sensitive Planar Microwave sensor for Detecting Direction and Angle of Rotation

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IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES 2020年第4期68卷 1598-1609页

作者： Jha, Abhishek Kumar Lamecki, Adam Mrozowski, Michal Bozzi, Maurizio Gdansk Univ Technol ETI Fac Dept Microwave & Antenna Engn PL-80233 Gdansk Poland EM Invent PL-80172 Gdansk Poland Univ Pavia Dept Elect Comp & Biomed Engn I-27100 Pavia Italy

This article presents a technique based on a modified complementary split-ring resonator (CSRR) to detect angular displacement and direction of rotation with high resolution and sensitivity over a wide dynamic range. The proposed microwave planar sensor takes advantage of the asymmetry of the sensor geometry and measures the angle of rotation in terms of the change in the relative phase of the reflection coefficients. The sensor consists of a movable modified CSRR (the rotor) and a microstrip line with a circular defect in the ground plane (the stator). By selecting the substrate material and the rotor thickness, the sensor can be designed to work at different operating frequencies. A theoretical model of the sensor is proposed and is followed by a detailed numerical analysis involving equivalent circuit simulations, full-wave computations, and measurement results. Using positioning error estimation and air-gap analysis, a technique based on phase-change measurements is found to be better than those based on magnitude measurements alone. The maximum sensitivity for measuring the angular rotation is found to be a 4.3 degrees change in the relative phase of the reflection coefficient per 1 degrees of rotation. The sensor has an angular measurement range from -90 degrees to +90 degrees. The sensor-a stator fabricated on a 0.5-mm-thick Rogers RT5880 substrate and three rotors fabricated on a 1.5-mm-thick Rogers RT5880, a 1-mm-thick FR4, and a 0.5-mm-thick Rogers RT5880-can effectively detect the direction of rotation, measure the angle of rotation and angular velocity with reasonable accuracy.

关键词： angular displacement sensor asymmetric devices directional rotation electrically small resonators microwave measurement technique microwave sensors rotation sensor

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