Status Quo and Developing Trend of MEMS-Gyroscope Technology

Li, Xiaolong; Xiao, Wei; Yu, F. Richard

doi:10.1109/imccc.2015.159

Cited by 10 publications

(11 citation statements)

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“…A comparison table of the various dead reckoning INS technologies was produced in a study by Andreas Løberg Carlsen [157] which is shown in Table 8. 1 Bias stability characteristic for the MEMS has been obtained from a more recent study [158].…”

Section: Navigation and Positioning Sensorsmentioning

confidence: 99%

“…However, in a recent study, Li et al have argued that, due to continuous improvement, smaller size and lower costs, MEMS technology will gradually replace FOGs in high end applications [158]. Furthermore, a team at NTNU are currently developing a north-seeking strapdown MEMS-based gyrocompass which will increase accuracy further [159].…”

Section: Navigation and Positioning Sensorsmentioning

confidence: 99%

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Inspection-Class Remotely Operated Vehicles—A Review

Capocci

Dooly

Omerdić

et al. 2017

JMSE

166

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This paper presents a review of inspection-class Remotely Operated Vehicles (ROVs). The review divides the classification of inspection-class ROVs; categorising the vehicles in order of size and capability. A state of the art technology review is undertaken, discussing various common subsystems of the ROV. Standard and novel ROV shapes and designs are reviewed, with emphasis on buoyancy, frame materials and hydrodynamics. Several power considerations and designs are discussed, accounting for battery fed and mains fed systems. ROV telemetry is split into a discussion on the various transmission hardware systems and the communication protocols that are most widely used in industry and research today. A range of thruster technologies is then introduced with consideration taken of the various thruster architectures available. Finally, the navigation and positioning sensors employed for ROV navigation and control are reviewed. The author has also created a number of comparison tables throughout the review; tables include comparison of wired data transmission technology, comparison of common ROV communication protocols and comparisons of various inertial navigation systems. By the end of the review the reader will have clearer understanding on the fundamentals of inspection-class ROV technologies and can use this as an introduction to further paper investigation.

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Section: Navigation and Positioning Sensorsmentioning

confidence: 99%

Section: Navigation and Positioning Sensorsmentioning

confidence: 99%

Inspection-Class Remotely Operated Vehicles—A Review

Capocci

Dooly

Omerdić

et al. 2017

JMSE

166

View full text Add to dashboard Cite

show abstract

“…The principle of heavy-medium gangue separation is to use a liquid with a density between coal and gangue as the medium. If the density of coal is lower than the medium, it will float up, and the gangue will sink if the density is higher than that of the medium to achieve the purpose of separation [ 6 ]. However, moving sieve jigging method and heavy medium separation are mechanical methods and therefore, can only deal with gangue within a specific size range with huge equipment, high cost, and high energy consumption.…”

Section: Introductionmentioning

confidence: 99%

Coal and Gangue Separating Robot System Based on Computer Vision

Sun

Huang

Ren

2021

Sensors

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In coal production, the raw coal contains a large amount of gangue, which affects the quality of coal and pollutes the environment. Separating coal and gangue can improve coal quality, save energy, and reduce consumption and make rational use of resources. The separated gangue can also be reused. Robots with computer vision technology have become current research hotspots due to simple equipment, are efficient, and create no pollution to the environment. However, the difficulty in identifying coal and gangue is that the difference between coal and gangue is small, and the background and prospects are similar. In addition, due to the irregular shape of gangue, real-time grasping requirements make robot control difficult. This paper presents a coal and gangue separating robot system based on computer vision, proposes a convolutional neural network to extract the classification and location information, and designs a robot multi-objective motion planning algorithm. Through simulation and experimental verification, the accuracy of coal gangue identification reaches 98% under the condition of ensuring real-time performance. The average separating rate reaches 75% on low-, medium-, and high-speed moving conveyor belts, which meets the needs of actual projects. This method has important guiding significance in detection and separation of objects in complex scenes.

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“…Compared with other transmission modes, hydraulic transmission system has been widely accepted because of its advantages of large power-mass ratio, convenient control, and smooth transmission [1][2][3]. Ultra-high pressure is one of the development directions in hydraulic field at present.…”

Section: Introductionmentioning

confidence: 99%

Study on Oil Film Characteristics of Piston-Cylinder Pair of Ultra-High Pressure Axial Piston Pump

et al. 2020

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The piston-cylinder pair is the key friction pairs in the piston pump. Its performance determines the volume efficiency of piston pump. With the increase of load pressure, the leakage at the clearance of piston-cylinder pair will also increase. In order to reduce leakage, the clearance of the piston-cylinder pair of the ultra-high pressure piston pump is smaller than that of the medium-high pressure piston pump. In order to explore whether the piston will stuck in the narrow gap, it is necessary to study the oil film characteristics of the piston-cylinder pair under the condition of ultra-high pressure, so as to provide a theoretical basis for the optimal design of the piston-cylinder pair of ultra-high pressure axial piston pump. In this paper, an ultra-high pressure axial piston pump is taken as the research object, and its structural characteristics are analyzed. The mathematical model of the oil film thickness of the piston-cylinder pair is established by using the cosine theorem in the cross section of the piston. The finite volume method is used to discretize the Reynolds equation of the oil film of the piston-cylinder pair, and the over relaxation iteration method is used to solve the discrete equations, and the mathematical model of the oil film pressure of the piston-cylinder pair is obtained. The mathematical model of oil film thickness and pressure field of piston-cylinder pair is solved by programming. The dynamic change process of oil film thickness and pressure field of the plunger pair of the ultra-high pressure axial piston pump under the load of 20 MPa and 70 MPa is obtained. Under the two conditions, the thinnest area of the oil film reaches 3 μm and 2 μm dangerous area respectively; the oil film pressure reaches 20 MPa and 70 MPa respectively when the swashplate rotates 10° and continues to increase with the increase of swashplate rotation angle. When the rotation angle reaches 90°, the oil film pressure also reaches the maximum value, but there is no pressure spike phenomenon. The oil film pressure characteristics of ultra-high pressure axial piston pump under conventional and ultra-high pressure conditions were obtained by modification and experimentation.

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Status Quo and Developing Trend of MEMS-Gyroscope Technology

Cited by 10 publications

References 0 publications

Inspection-Class Remotely Operated Vehicles—A Review

Inspection-Class Remotely Operated Vehicles—A Review

Coal and Gangue Separating Robot System Based on Computer Vision

Study on Oil Film Characteristics of Piston-Cylinder Pair of Ultra-High Pressure Axial Piston Pump

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