A Novel Combined Method for Measuring the Three-Dimensional Rotational Angle of a Spherical Joint [PDF]
Sensors, 2023 To improve the measurement accuracy of the three-dimensional rotation angle of a spherical joint, a novel approach is proposed in this study, which combines magnetic detection by a Hall sensor and surface feature identification by an eddy current sensor.
Qianyun Yang +4 more
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A New Method for Measuring the Rotational Angles of a Precision Spherical Joint Using Eddy Current Sensors [PDF]
Sensors, 2020 Precision spherical joint is a spherical motion pair that can realize rotation with three degrees of freedom. This joint is widely used in robots, parallel mechanisms, and high-end medical equipment, as well as in aerospace and other fields. However, the
Penghao Hu +5 more
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A Novel Method for the Micro-Clearance Measurement of a Precision Spherical Joint Based on a Spherical Differential Capacitive Sensor [PDF]
Sensors, 2018 A spherical joint is a commonly used mechanical hinge with the advantages of compact structure and good flexibility, and it becomes a key component in many types of equipment, such as parallel mechanisms, industrial robots, and automobiles.
Wen Wang +7 more
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A Novel Approach for Detecting Rotational Angles of a Precision Spherical Joint Based on a Capacitive Sensor [PDF]
Micromachines, 2019 Precision spherical joints are commonly employed as multiple degree-of-freedom (DOF) mechanical hinges in many engineering applications, e.g., robots and parallel manipulators.
Wen Wang +7 more
doaj +2 more sources
Health Monitoring of Bolted Spherical Joint Connection Based on Active Sensing Technique Using Piezoceramic Transducers [PDF]
Sensors, 2018 Bolted spherical joints are widely used to form space steel structures. The stiffness and load capacity of the structures are affected by the looseness of bolted spherical joint connections in the structures.
Jing Xu +5 more
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Error Analysis of a Spherical Capacitive Sensor for the Micro-Clearance Detection in Spherical Joints [PDF]
Micromachines, 2020 Spherical joints have attracted increasing interest in the engineering applications of machine tools, industrial robots, medical equipment, and so on. As one of the promising methods of detecting the micro-clearance in spherical joints, the measurement ...
Wen Wang +5 more
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Looseness Monitoring of Bolted Spherical Joint Connection Using Electro-Mechanical Impedance Technique and BP Neural Networks [PDF]
Sensors, 2019 The bolted spherical joint (BSJ) has wide applications in various space grid structures. The bar and the bolted sphere are connected by the high-strength bolt inside the joint.
Jing Xu +4 more
doaj +2 more sources
Spherical coral-like synovial chondroma within a popliteal cyst: a case report [PDF]
Frontiers in MedicinePopliteal cysts are common lesions, primarily characterized by soft tissue swelling, which may occasionally present with calcifications or small osteochondromas, and can rarely lead to restricted movement.
Bingyan Mao +4 more
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Knee Kinematics Estimation Using Multi-Body Optimisation Embedding a Knee Joint Stiffness Matrix: A Feasibility Study. [PDF]
PLoS ONE, 2016 The use of multi-body optimisation (MBO) to estimate joint kinematics from stereophotogrammetric data while compensating for soft tissue artefact is still open to debate.
Vincent Richard +4 more
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Nonlinear Characteristic of Spherical Joints with Clearance
Journal of Aerospace Technology and Management, 2015 Joints in deployable structures can degrade the stiffness and the stability of spacecraft. In this study, the nonlinear stiffness of spherical joints is investigated.
Jing Zhang +3 more
doaj +5 more sources