The Road Detection Technology of Vision Navigation for Picking Robot

Xiong Juntao,Zhong Pengfei,Zou Xiangjun 보안공학연구지원센터 2015 International Journal of Signal Processing, Image Vol.8 No.9

Vision navigation technology of the autonomous walking robot has been conducted in the research. Based on the characteristics of picking robot working environment, the visual system for the independent walking car is designed, which applies monocular camera to obtain images of marking lines on the surface of road for pre processing. Using the image gray contrast constraints determines the information of the effective area on the surface of road. Then the Hough linear detection combined with constraint will be used for the recognition and detection of the indication line on the surface, and the information of visual examination path will be fed back to the car control system as following. Through the ultrasonic sensors on the head of the walking car, the walking car can detect the obstacle at the same time. According to the real-time feedback data of ultrasonic sensor, fuzzy propulsion and calculation determine the information of the obstacles on the road surface ahead of time in order to achieve the function of real-time obstacle avoidance. The result of visual navigation test shows that maximum deviation of the car walking straight line based on visual navigation system is 1.5cm and the maximum deviation of curve walking is 6cm. The success rate of obstacle avoidance is 96.67%, which can meet the requirement of the vision navigation of picking robot and provide technical support for the autonomous navigation and intelligent operation of picking robot.

Research of Face Recognition System Based on Visual Intelligent Monitoring

He Zhiliang,Xiong Juntao,Mai Zhiheng,Zhong Pengfei,Tang Linyue 보안공학연구지원센터 2016 International Journal of Multimedia and Ubiquitous Vol.11 No.5

The key technology of intelligent face recognition based on the visual monitoring was researched. Firstly, obtained the real-time scene by video camera, and the background difference method was used to judge whether there is a character goal in monitoring region, in view of the existing target, the color space of YCgCr and YCgCb were chosen to detect skin color, the geometric constraints that the aspect ratio of facial contour is 0.8 to 1.85 was used to realize the positioning of face region. Then the improved 2DPCA algorithm was used for face recognition, and data matching with the established database of face to determine the validity character identity. Finally the identification results were sent to the mobile terminal through the control system. System test results show that the processing speed of face recognition is 7 s/times, and the accuracy of face recognition results was 85%, which can provide technical support for the identity intelligent recognition of visual monitoring.

Generic Information System for Chain Stores based on Borland C++ Builder

Changyu Liu,Juntao Xiong,Bin Lu 보안공학연구지원센터 2015 International Journal of Smart Home Vol.9 No.11

With the rapid growth of global economy, chain stores are springing up all over the world and have dominated more and more service markets, e.g., retail and dining. Accordingly, chain businesses have been one of the fastest growing industries since the beginning of this century. However, there are many bottlenecks for further producing competitive advantages of chain businesses, such as relatively small scales of chain stores, rather weak information awareness of managers, incompetent staffs and diversified business processes of chain stores, by using the traditional manual management. The introduction of chain store information systems, which integrate usually comprehensive information technologies, could provide managers of chain stores with a decision making yet overall management platform. In this paper, we develop a generic yet efficient information system for chain stores using MIDAS based three-tier client-server architecture. Besides, we also illustrate the system from three most principal stages in software engineering, which are system analysis, system design and system implementation.

Toward Integrated and Automated Management of Government Affairs

Changyu Liu,Juntao Xiong,Bin Lu 보안공학연구지원센터 2016 International Journal of Hybrid Information Techno Vol.9 No.1

An efficient government office automation system, which contributes significantly to social supervision, administrative efficiency, administrative quality, and service capacity, has been an important criterion for assessing the development of a country. With the rapid development of the global economy, more and more such systems are designed and implemented. However, few of them could take into unified account ever changing requirements of government affairs. In this paper, we develop an integrated and automated management system for government affairs. In the beginning, we analyze why we need the new system by introducing the overall background of the electronic governments and the office automation system. Then, according to system requirements, we divide the system into four functional modules, i.e., the login module, the approval flow module, the document management module, and the system management module. After that, we present many details about the architecture, the modules, and the database for the system design. Finally, illustrating both processes and interfaces of required modules, we implement the system based on the well known three-tier B/S architecture.

A New Method of Gelatin Modified Collagen and Viscoelastic Study of Gelatin-Collagen Composite Hydrogel

Lang He,Sheng Li,Chengzhi Xu,Benmei Wei,Juntao Zhang,Yuling Xu,Beirong Zhu,Yang Cao,Xilin Wu,Zhijin Xiong,Rongrui Huang,Jian Yang,Haibo Wang 한국고분자학회 2020 Macromolecular Research Vol.28 No.9

Pure collagen materials are expensive with poor mechanical properties, which need modifications in most cases. As the degradation product of collagen, gelatin is cheap, degradable and biocompatible, but few literatures have reported the research about gelatin-collagen composite materials. This is because gelatin and collagen have different soluble temperatures—gelatin is soluble in hot water (≥30 oC) and swells in cold water. However, a low temperature (2-10 oC) is required to prepare and store collagen solution, and neutral collagen solution denatures quickly above the room temperature. In this study, gelatin was ground into powders and swelled in neutral bovine tendon pepsin-soluble collagen solution (BPSC) to form a homogeneous gelatin-collagen mixture, in light of the swelling characteristics of gelatin in cold water. The assembly properties and gel properties of this composite material were further studied. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) test results showed that the bovine tendon collagen had typical type-I collagen structural characterizations with two α chains of about 100 kDa and one β chain of about 200 kDa; while the SDS-PAGE pattern of gelatin displayed bands continuously distributed from 30 to 200 kDa. Amino acid composition analysis test indicated that the content of polar amino acids and the sum of acidic and base amino acids for gelatin were higher than that of BPSC. Studies on gel properties demonstrated that gelatin-collagen mixed solution had collagenlike assembly characteristics and assembly kinetics. The moduli of the assembled gel at 35 oC were equivalent to that of pure bovine tendon collagen system; moreover, the system moduli didn’t change with time with elastic moduli (G') of about 40 Pa. However, at 25 oC, the moduli of gelatin-collagen composite hydrogel increased with the extension of time, its G' increased about 18 times within 8 h, and the ratio of elastic modulus to viscous modulus (G'') increased 4.6 times, showing a significant aging effect of structural strength. Meanwhile, the mechanical strength of the composite hydrogel was also regulated by temperature—the gel was highly elastic (G'≈3,000 Pa, G'>>G'') at a low temperature (5 oC); as the temperature rose, the system moduli gradually decreased and the elastic gel transformed into waterlike fluid at 50 oC little by little. What’s more, gelatin-collagen composite hydrogel also had reversible sol-gel performances and self-healing capability similar to the gelatin hydrogel. This novel preparation method for preparing composite materials and the resultant composite hydrogel are expected to be used in the fields of natural food gels, injectable hydrogels, cell scaffolds, drug sustained-release materials and so on, and improve and promote the processing performances, price and large-scale production of collagen-based materials.