Shi Ming Wang

A Design of Short Range Wireless Communication Module Based on nRF24L01

This design is a short-range wireless transmission module based on nRF2401, which carries out the data acquisition, short-range wireless transmission, the data display and the port communications between computer and MCU via RS232 serial port. The sensor node circuit based on nRF2401 module was implemented in the paper. The main communication flow chart is described in detail.

Design of Rotational Speed Measurement System Based on the Hall Sensor

This paper introduces a design of a STC89C52 microcontroller as the main controller, the motor speed is measured by the Hall sensor. This design uses integrated Hall sensor, which has a frequency response, high precision and anti-interference ability. This article describes the working principle of the method and method of use of the Hall sensor measurement speed

A Hydrodynamic Analysis of Offshore Platform Based on the AQWA

With the drying up of land resources, the oil and natural gas,power generation equipment, and ocean data is in so great request that the research of the offshore platform is increasingly important.Offshore platform structure and the design of the mooring system both are influenced by the hydrodynamic performance.Then the floating type marine equipment carrier of hydrodynamic being analyzed after doing the frequency domain calculation for the model of floating body by the hydrodynamic software AQWA here.

Simulation Analysis and Experimental Research on Direct-Drive Wave Turbine

This paper describes a new kind of direct-drive wave turbine, which collects wave energy and part of tide through a specially designed turbine device. We want to know the right flow rate,the maximum torque, the average power.Focusing on the use of ANSYS software for the model under different flow rates, we obtain important parameters such as torque and power. Then further analysis and research by experiment are proposed. We could draw a conclusion that the device is a low number of revolutions of the turbine, which unit capacity of up to 300W, suitable for the actual ocean wave gathering requirements .The article can provide practical guidance to optimize the design.

Design of Parts Processing and Control System Based on PLC

This article focuses on the design of parts processing and control system based on Siemens S7-200 PLC. The purpose of this study is to learn and become familiar with the Siemens S7-200PLC hardware parameters and the use of programming software STEP 7 Micro/WIN SP9, and design a rational and effective parts processing and control system. This paper firstly describes the development history and development status of the PLC, so that readers can understand the PLC briefly. Secondly, the article shows some important technical parameters such as Siemens S7-200PLC CPU model, hardware configuration and so on. It is to clarify the basic component of parts processing and control system and its working principle, and the role of Siemens PLC in the system. Finally, according to specific design requirements, programming software STEP 7 Micro/WIN SP9 is used to program for the system so that the system can operate effectively and reasonably. The study successfully achieved the desired goals, through reasonable programming made PLC take the full control of parts processing in this system..

Design of Desalination Reverse Osmosis System Power-Supplied by PV and Wind Energy

The most popular renewable energy are solar and wind. As the problems of energy shortage and environment pollution become more serious, hybridizing energy sources turn to be a crucial solution to reach sustainable development. The present work theoretically concentrates on teasing out a set of complete and clear calculation method for deigning a seawater RO desalination unit powered by Wind-PV energy systems to produce potable water. This paper suggests a series of simple estimation models to help optimize the matching of wind and solar desalination modules.

The Overview of Wave Power Generation

Now the world is running short of source and the human beings are developing different kinds of new energy resources. This article introduced and analysis several kinds of wave power devices, tells the advantage and disadvantages. There is a great improvement in the modern wave power generating sets, but still some technology bottlenecks, we should work on these challenges and make full use of the ocean energy resources with the lowest cost.

Research on New Type Magnetohydrodynamic Ocean Wave Energy Conversion System

Liquid Metal MHD generation system for wave energy takes the wave motion into reciprocating motion of the liquid metal by using the efficient liquid Metal MHD power generation technology, and then the wave energy directly changes into electrical energy through the power conversion system. According to this principle, a flexible and direct magnetic fluid generating structure for wave energy is proposed. It selects the appropriate permanent magnet material and the liquid fluid, also an articulated manner to the permanent magnet. An array mode of permanent magnet and the initial channel structure of generating is important. The device has an advantage of low pollution, high efficiency and technology, can reduce energy consumption, improve energy conversion efficiency.

Feasibility Analysis on Oscillating Buoy Wave Power Device for Ocean Buoy

When the oscillating buoy wave power device installed on the ocean buoy, the floater and the ocean buoy move up and down under the action of the waves. Therefore, whether there is a vertical relative displacement between the floater and the ocean buoy becomes a crucial problem of the wave power generation. Based on the wave theory, taking the vertical cylinder floater for example, introduced the wave force and the moving displacement of the floater，the relative displacement between the floater and three different sizes of ocean buoys under four different oceanic conditions was analyzed by MATLAB. The result indicates that the greater wave height, the greater relative displacement; the shorter wave period, the greater relative displacement; and the larger size of the ocean buoy, the greater relative displacement. So the electric power can be generated and the scheme is feasible.

Flow Field Analysis of a Horizontal Wave Flow Turbine Power Plant Based on FLUENT

Used Profili, Gambit and FLUENT software to build 2D model of the horizontal wave flow turbine power plant which developed by Shanghai Ocean University, and to simulate its pressure and velocity flow field under the RNG k-ε turbulence model with rotational speed accordingly 75r/min, 110r/min and 150r/min while the incoming flow velocity was 2m / s .By showing and analysing its pressure speed clouds, summarized the flow regular impacts to the rotaional turbine,which provided an important numerical reference to the blade strcture optimization and its strength check and indicated a right simulation method to solve the similar fluid simulation project.