Papers by Author: Xiang Hong Kong

Abstract: to study the nonlinear oscillation principle of new robofish’s two joints tail, the relationship between tilt angle of tail fin that produces thrust and cycle offer quency produced by two joints fin tail propulsion system can be calculated applying reciprocating motion principle in theory; by means of contrastive analysising the results of calculation model, and making use of MATLAB simulation environment to experimental simulate motion model, the fin tail NLSST can be further proved.

Abstract: An ultrasound velocimetry system based on single-chip CC2530 was designed, this combined the transit-time velocimetry and Doppler velocimetry, achieving the monitoring of wireless sensor network to the speed of the car. The Proteus software simulates the hardware circuits of the ultrasonic transmitter and receiver module. An ultrasound velocimetry system measures high-speed by the ultrasonic Doppler principle, it measures low-speed through the transit-time principle, the speedometer system was verified by the simulation technology. The design has a low complexity, low power, low cost, small error, application and so on.

Abstract: To visualize the conditionson the sea bed. People created the robot which could move under water. Theunderwater robot control system usually consists of the host computer,interactive interface and lower machine. This paper mainly designed underwaterrobots interactive interface based on QT software in VC++ developmentenvironment, exploiting the distance measurement principle of ultrasonic andcollect information . Underwater robot feedback information mainly includescurrent velocity, distance between the front obstacle and a travelinglocus. Important ocean environmentparameter will be represented visually by analyzing forming three-dimensionalchart after the simulation by MATLAB, even the environmental factor ofSeafloor.

Abstract: Squid jigging machine is an important equipment in the oceanic squid jigging fisheries. In order to take centralized control of multi jigging machines, improve manufacturing efficiency, this paper introduce the centralized control circuit between PC and single chip microcomputer for the communication within multi jigging machines by the way of RS-485 bus in detail, and we focus on describing the design of the hardware circuit for the centralized control system. The master is PC while the slave is MCS-51. The communication between them is realized by the MSComm control in VB6.0. It researches practicable ways to improve the reliability of RS-485 bus system, respectively from different aspects such as bus conflict, burst interference, common mode interference and nodes fault and so on. This study provides reference data for the researchers.

Abstract: 3-hydroxyflavone (3-HF) is a kind of organic molecule with excited state proton transfer (EFPT) effect, and is a good performance nonlinear optical material. In this paper, the nonlinear refractive index and two-proton absorption coefficient of 3-HF were measured by using z-scan technique with ps pulsed laser at 355nm and 532nm respectively. In the experiment, we observed that the two-proton absorption coefficient was decreased as the incident intensity was increased.

Abstract: Abstract: We report the dependence of the all optical switching effect of 3-hydroxyflavone (3-HF) on the efficiency of excited state proton transfer (ESPT) using pump probe method. A cw probe laser beam of 632.8nm passing through the sample is switched off by a 35ps pulse pump laser beam of 355nm. We also measured the nonlinear refractive index of 3-HF in different solvents by using z-scan technique. The results show that the optical switching effect will be more obvious when the efficiency of excited state proton transfer is improved, while not proportional to the nonlinear refractive index of 3-HF.