Shenzhen Key Laboratory of Precision Engineering

Shenzhen, China

Shenzhen Key Laboratory of Precision Engineering

Shenzhen, China
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Zhou W.,CAS Shenzhen Institutes of Advanced Technology | Zhou W.,China University of Petroleum - Beijing | He K.,CAS Shenzhen Institutes of Advanced Technology | He K.,Shenzhen Key Laboratory of Precision Engineering | And 6 more authors.
IOP Conference Series: Earth and Environmental Science | Year: 2017

Cavitating water jet technology is a new kind of water jet technology with many advantages, such as energy-saving, efficient, environmentally-friendly and so on. Based on the numerical simulation and experimental verification in this paper, the research on cavitating nozzle has been carried out, which includes comparison of the cleaning ability of the cavitating jet and the ordinary jet, and comparison of cavitation effects of different structures of cavitating nozzles. © Published under licence by IOP Publishing Ltd.


Mao J.,CAS Shenzhen Institutes of Advanced Technology | Mao J.,Harbin University of Science and Technology | Mao J.,Shenzhen Key Laboratory of Precision Engineering | He K.,CAS Shenzhen Institutes of Advanced Technology | And 5 more authors.
2016 IEEE International Conference on Information and Automation, IEEE ICIA 2016 | Year: 2016

In order to meet the requirements that wallclimbing robot for ship degusting can adsorb on the hull surface and move flexibly, a new track-Type permanent magnetic adsorption device is presented. It is made up of a plurality of permanent magnetic adsorption units and chains, using screws to connect. In this paper, the basic structure of the permanent magnetic adsorption unit is designed and the theoretical model of static magnetic field based on finite element analysis is established. Then, based on the finite element method, we analyze the key structural parameters of the permanent magnetic adsorption unit, obtain its distribution of magnetic induction intensity and magnetic adsorption capacity. According to the results of finite element analysis, we conduct an optimized analysis on the key structure parameters of the permanent magnetic adsorption unit. The analysis shows that the width parameter of the permanent magnet has the greatest influence on the adsorption capacity. Accordingly, the structure size of the adsorption unit is determined and the experimental verification is carried out. The experimental results show that the results of finite element analysis are accurate and reliable, the permanent magnetic adsorption unit we designed can provide sufficiently large adsorption capacity. © 2016 IEEE.


Wang Y.,CAS Shenzhen Institutes of Advanced Technology | Wang Y.,China University of Petroleum - Beijing | Mao H.,CAS Shenzhen Institutes of Advanced Technology | Mao H.,Shenzhen Key Laboratory of Precision Engineering | And 4 more authors.
2016 IEEE International Conference on Information and Automation, IEEE ICIA 2016 | Year: 2016

The dynamic crushing and energy absorption of regular and functionally graded cellular metal is investigated using finite element method. The cellular metal consists of hollow cubic structure which is manufactured by way of stamping. The functionally graded cellular structure is designed by changing the side length of hollow cubic structure. Dynamic crushing simulation of both regular and functionally graded structures was conducted. The numerical simulation results show that the functionally graded one is more superior in energy absorption than the regular one. Different from the regular one, the stressstrain curve of the functionally graded structure has 4-four stress plateau stages. Positive gradient and negative gradient functionally graded structures were also simulated and compared under different impact speed. The decreasing one was supposed to be more stable. The study provides a new insight into functionally graded cellular structure. © 2016 IEEE.


Yu M.,CAS Shenzhen Institutes of Advanced Technology | Yu M.,Shenzhen Key Laboratory of Precision Engineering | Yu M.,Guangdong University of Technology | Lin H.,CAS Shenzhen Institutes of Advanced Technology | And 3 more authors.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2015

A weak signal processing system for spectrum analyzing using low-noise isolation and amplification and low-pass Filter (LPF) methods is developed. In order to extract the spectrum signals from the external disturbance as well as regenerate the detected results dynamically, a method of synchronized isolation and amplification is used to amplify the weak signals exponentially as well as to isolate the noise of random frequency by electromagnetic induction technology, and a LPF is designed to keep the output signals stable. What's more, an interface based on MFC single document view is programmed to display and save the scanned spectrum diagram. As a result, more than 1.5 million times of amplification, less than 9nAof current drift and a cut-off frequency of 10Hzisequipped for the system. © 2015 SPIE.


Hou C.,Harbin Institute of Technology | Zhang P.,Chinese University of Hong Kong | Zhang P.,Shenzhen Key Laboratory of Precision Engineering | Hu Y.,Chinese University of Hong Kong | Zhang J.,University of Hamburg
2012 IEEE International Conference on Robotics and Biomimetics, ROBIO 2012 - Conference Digest | Year: 2012

In this paper, a 5-DOF serial-parallel manipulator with RP-(2-RRU/1-RUU) structure is proposed. This manipulator is used to the automatic production line, to complete the materials' loading, delivery and unloading. In order to ensure the safety and high efficiency production, the manipulator has good stiffness and high accuracy, and is suitable for the fast operation. Based on the above requirements, the manipulator has the big work space characteristic of the serial mechanism and the high precision and stiffness characteristic of the parallel mechanism. However, the difficulty of its dynamics analysis is increasing. In this paper, the modal analysis and the harmonic response analysis are carried out using finite element analysis software, and the dynamic characteristics of the manipulator are derived. The inverse dynamics modeling has been performed based on the Newton-Euler method. The dynamics simulation is carried out to check the correctness of dynamics modeling. This study is also significant to the trajectory planning and control system. © 2012 IEEE.


Qin W.C.,CAS Shenzhen Institutes of Advanced Technology | Qin W.C.,Shenzhen Key Laboratory of Precision Engineering | Qin W.C.,Chinese University of Hong Kong | Qi J.R.,CAS Shenzhen Institutes of Advanced Technology | And 6 more authors.
Applied Mechanics and Materials | Year: 2014

Based on the theory of FEM, we have established a viable three-dimensional dynamic simulation of welding field analysis method, heat distribution with a double ellipse as a welding heat source, to establish a reasonable boundary conditions, which is a reasonable choice of welding numerical simulation provides a theoretical basis, laying the groundwork for welding numerical simulation analysis of the gold industry. © (2014) Trans Tech Publications, Switzerland.


Miao Y.,CAS Shenzhen Institutes of Advanced Technology | Miao Y.,Shenzhen Key Laboratory of Precision Engineering | Miao Y.,Hefei University of Technology | He K.,CAS Shenzhen Institutes of Advanced Technology | And 6 more authors.
Applied Mechanics and Materials | Year: 2014

This paper designs a CAM system for a jewelry-making CNC machine. The CAM system not only provides a human-computer interface for setting machining parameters, but also can generate special NC programs automatically and realize the simulation for the machining process. In addition, the paper gives an efficient application for machining an ellipsoidal gold bead. The basic design of the jewelry-making CAM system and the experimental results are presented. © (2014) Trans Tech Publications, Switzerland.


Mao H.,CAS Shenzhen Institutes of Advanced Technology | Mao H.,Shenzhen Key Laboratory of Precision Engineering | He K.,CAS Shenzhen Institutes of Advanced Technology | He K.,Shenzhen Key Laboratory of Precision Engineering | And 3 more authors.
Advanced Materials Research | Year: 2013

Reduction tube using a die is a kind of deformation tubes which are used on railway train as energy absorbers. In this paper, axial compression behavior and energy absorption characteristics of reduction tubes using a die under impact load are investigated. No-linear finite element software LS-DYNA is used to conduct the numerical study. Results for the expansion tube using a die (another kind of deformation tube) and the reduction tube using a die are compared. Assuming two different structures with the same material and sectional area, an analysis shows that the energy absorption of reduction tube is better than the expansion tube. Hence, the reduction tubes using a die are investigated using a series of numerical analysis. The relationship between displacement and load, average load are obtained. The influences of impact mass and impact velocity are discussed. © (2013) Trans Tech Publications, Switzerland.


Xie X.,CAS Shenzhen Institutes of Advanced Technology | Xie X.,Huazhong University of Science and Technology | Ma C.,CAS Shenzhen Institutes of Advanced Technology | Sun Q.,CAS Shenzhen Institutes of Advanced Technology | And 2 more authors.
Applied Mechanics and Materials | Year: 2013

Non-rigid image registration plays an important role in medical imaging. One disadvantage of classic Demons algorithm is that the topological preservation can not be ensured, and it can only deal with the single modality image registration. The mutual information algorithm has been validated useful for multi-modality image registration. By analyzing the critical points of Demons registration like mis-registration, an improved algorithm with mutual information evaluation is proposed. Experiment results show that the proposed algorithm can deal with multi-modality image registration well and it can hold the abilities even faces the noise and distortion. © (2013) Trans Tech Publications, Switzerland.


Mao H.,CAS Shenzhen Institutes of Advanced Technology | Mao H.,Shenzhen Key Laboratory of Precision Engineering | Luo C.J.,CAS Shenzhen Institutes of Advanced Technology | Luo C.J.,Shenzhen Key Laboratory of Precision Engineering | And 3 more authors.
Applied Mechanics and Materials | Year: 2014

The present paper deals with the numerical study of energy absorption of reduction tubes using a die subject to axial impact load. Non-linear finite element software LS-DYNA is employed to analyze the deformation pattern and energy absorption characteristics. The tubes, with the bottom ends constrained axially, deformed in necking modes by the axially moving dies. The geometries of the tubes and the dies were varied to find out the influence of the geometry parameters. The strain rate effect of the material is considered and the Cowper-Symonds equation is applied in the plastic dynamic analysis. © (2014) Trans Tech Publications, Switzerland.

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