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Enhancing optomechanical force sensing via precooling and quantum noise cancellation

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Science China(Physics,Mechanics & Astronomy) 2020年第1期63卷 44-54页

作者： Tesfay Gebremariam Ye-Xiong Zeng Mojtaba Mazaheri Chong Li Department of Physics Ar ba Minch UniversityAr ba Minch 21Ethiopia School of Physics Dalian University of TechnologyDalian 116024China Department of Basic Science Hamedan University of TechnologyHamedan 65169-1-3733Iran

We theoretically investigate optomechanical force sensing via precooling and quantum noise cancellation in two coupled cavity optomechanical systems. We show that force sensing based on the reduction of noise can be used to dramatically enhance the force sensing and that the precooling process can effectively improve the quantum noise cancellation. Specifically, we examine the effect of optomechanical cooling and noise reduction on the spectral density of the noise of the force measurement; these processes can significantly enhance the performance of optomechanical force sensing, and setting up the system in the resolved sideband regime can lead to an optimization of the cooling processes in a hybrid system. Such a scheme serves as a promising platform for quantum back-action-evading measurements of the motion and a framework for an optomechanical force sensor.

关键词： hybrid optomechanical system coherent quantum noise cancellation force sensing

Enhancing force sensing in a squeezed optomechanical system with quantum nondemolition measurement

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Communications in Theoretical Physics 2024年第1期76卷 49-60页

作者： Shi-Lei Chao Zi-Hao Li Xin-You Lü School of Physics Huazhong University of Science and Technology430074 WuhanChina

A theoretical scheme is proposed to enhance the sensitivity of force sensors with quantum nondemolition measurement(QND)in an optomechanical setup assisted by four-tone optical driving and an optical parametric amplifier(OPA).With the help of special drive,the system can be simplified as the typical type of QND for force sensing,so that the backaction noise can be evaded to surpass the standard quantum ***,the added noise can be suppressed owing to the modified optical susceptibility resulting from the *** introducing two oscillators coupling with two charged bodies respectively,the signal can be enhanced with the nonlinearity caused by Coulomb interaction,while the noise presents an exponential ***,considering the homodyne detection effect,the range of system parameters and frequency bands will be *** present investigation may provide a route toward simultaneously evading backaction noise,reducing the mechanical thermal noise,and enhancing the external signal,which can be an alternative design for sensitive devices.

关键词： force sensing optical parametric amplifier quantum non-demolition measurement optomechanical system

Inflection point identifying of weld seam based on force sensing in tele-teaching

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China Welding 2009年第4期18卷 59-62页

作者：刘立君高洪明吴林 Ningbo Institute of Technology. Zhejiang University Ningbo 315100. State Key Laboratory of Advanced Welding Production Teehnology Harbin Institute of Technology Harbin 150001

Weld seam inflection points are inevitable in tele-teaching process on many welding occasions. The inflection points identified accurately is one of the prerequisites of ensuring tele-teaching precision. On the basis of the inflection point characters, the concept of inflection point direction coefficient is proposed, the human-simulation intelligent control model of inflection point is established. The algorithms above, the inflection point identifying of box workpiece can be well performed. The experimental results show that the identifying average error of inflection point can be reduced to less than O. 5 mm by using optimal treatment of robot off-line programming system. The identifying control can automatically identify weld seam inflection points which can meet tele-teaching requirements.

关键词： tele-teaching force sensing weld seam inflection point

Progress in force-sensing Techniques for Surgical Robots

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Journal of Shanghai Jiaotong university(Science) 2023年第3期28卷 370-381页

作者：高红岩艾孝杰孙正隆陈卫东高安柱 Department of Automation Shanghai Jiao Tong UniversityShanghai 200240China Institute of Medical Robotics Shanghai Jiao Tong UniversityShanghai 200240China School of Science and Engineering The Chinese University of Hong KongShenzhen 518172GuangdongChina

force sensing is vital for situational awareness and safe interaction during minimally invasive ***,surgical robots with integrated force-sensing techniques ensure precise and safe *** the past few decades,there has been considerable progress in force-sensing techniques for surgical *** review summarizes the existing electrically-and optically-based force sensors for surgical robots,including piezoresistive,piezoelectric,capacitive,intensity/phase-modulated,andﬁber Bragg *** principles,applications,advantages,and limitations are also ***,we summarize our conclusions regarding state-of-the-art force-sensing technologies for surgical robotics.

关键词： force sensing surgical robots minimally invasive surgery

Tough,conductive hydrogels with double-network based on hydrophilic polymer assistant well-dispersed carbon nanotube for innovative force sensor

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Science China(Technological Sciences) 2022年第5期65卷 1160-1168页

作者： CHEN GuoYin GUO Ying HSIAO S.Benjamin HOU Kai ZHU MeiFang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai201620China Department of Chemistry Stony Brook UniversityNew York11794USA

In recent years,conductive hydrogels have become a promising candidate for application in fields such as tissue engineering and flexible electronic devices because of their conductivity,soft and wet ***,the preparation of tough and uniformly conductive hydrogels remains challenging because conductive nanofillers tend to aggregate during hydrogel ***,a hydrophilic polymer assistant dispersion strategy is proposed to fabricate a tough,conductive composite hydrogel with doublenetwork based on well-dispersed carbon nanotubes(CNTs).In particular,A@T_(2.0)/polyacrylamide(PAM)hydrogels showed a tensile strength of 332.9 kPa,elongation of 584.6%,Young’s modulus of 91.5 kPa,and conductivity of 2.765 S m^(-1),and a demonstration was performed to show the strain sensing for health monitoring and *** showed that the fabricated conductive hydrogels offer promising and broad insights in the field of wearable sensors for health monitoring,innovative electronics,and human-machine interactions.

关键词： alginate carbon nanotubes conductive hydrogel tough force sensing

Advances in tissue state recognition in spinal surgery:a review

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Frontiers of Medicine 2021年第4期15卷 575-584页

作者： Hao Qu Yu Zhao Department of Orthopaedics Peking Union Medical College HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China

Spinal disease is an important cause of cervical discomfort,low back pain,radiating pain in the limbs,and neurogenic intermittent claudication,and its incidence is increasing *** the etiological viewpoint,these symptoms are directly caused by the compression of the spinal cord,nerve roots,and blood vessels and are most effectively treated with *** surgeries are primarily performed using two different techniques:spinal canal decompression and internal *** the past,tactile sensation was the primary method used by surgeons to understand the state of the tissue within the operating ***,this method has several disadvantages because of its ***,it has become the focus of spinal surgery research so as to strengthen the objectivity of tissue state recognition,improve the accuracy of safe area location,and avoid surgical injury to *** from traditional imaging methods,surgical sensing techniques based on force,bioelectrical impedance,and other methods have been gradually developed and tested in the clinical *** article reviews the progress of different tissue state recognition methods in spinal surgery and summarizes their advantages and disadvantages.

关键词： spinal surgery tissue state recognition image force sensing bioelectrical impedance