Good accessibility to the internet, cheap and reliable wireless sensor network (WSN), together with the explosion of ubiquitous wireless devices like computers, PDA and smart-phones etc, extend the application of the Internet of Things (IOT) technology from traditional fields such as the logistics to engineering fields in which the real-time monitoring of the function and the reliability or safety of machines or engineering structures like bridges becomes more and more crucial. The work in this paper aims at the development of a monitoring system for the type of cranes which are used to hoist heavy loads in the open air environment by using the technology of IOT. And a safety monitoring system, which consists of both hardware unit and software, has been developed and is now being practically applied in engineering. The software of the system is developed on NET platform and the operating platform is Windows operating system.

Though composites, particularly those consisting of organic materials, have replaced the role of traditional metallic materials in various engineering applications due to their relatively high mechanical strength, low density, flexibility and low cost, their disadvantages caused by relatively high porosity ratio and low crystallinity inherently make this kind of materials the less favorable choices when low permeation property is a major criterion. Here pure aluminum (Al) thin film, which has excellent anti-corrosion property, is introduced into the structure of fabricated composites to improve the composite’s anti-permeation behavior in corrosive environment while the advantageous points of organic composites are exploited at the same time by applying the optimized thermo-mechanical processing techniques in fabrication. Thus greater potentials for organic polymeric composites may be achieved in the future.

The impact dynamics of spatial multi-link flexible multibody system is studied based on the continuous contact force method (CCFM). According to the rigid-flexible coupling dynamic theory of flexible multibody system, the rigid-flexible coupling continuous dynamic equations of the system are established by using the recursive Lagrange method. The impact dynamic equations of the system are stylized derived on the use of CCFM basing on the nonlinear spring-damper model. The contact separation criterion is given to achieve the conversion and calculation of the dynamic model for the system at different stages. An impact dynamic simulation example for a two-link planar flexible multibody system is given, as well as the global dynamic response. The results show that the impact dynamic solving method based on CCFM can be used for the global impact dynamics of multi-link flexible multibody systems. The dynamic behavior of the system changes dramatically during the impact process. The large overall motion, the small deformation motion and the impact effect are coupled.

In an effort to help meet growing demands being placed on available water supplies, the evaluation of the healthy conditions of the hydraulic engineering in service, monitoring of the real-time state of hydraulic engineering being built, dealing with the water management for agricultural irrigation as well as on the information about the experts and personnel(s) involving the previously mentioned business, a comprehensive system, consisting of the hardware configuration and software system, has been developed and is being put in use now. The software system is proposed to be developed on the NET system and the SQL System of Microsoft.

Sealing processing technique, a major measure to join parts or components together in machinery or electronic industry, is adopted in this research to seal the fabricated composite material and protect the composite from the potentially harmful influence of the outside environment, particularly the environment with corrosive media like ozone gas (O3), etc. The manufactured composite material mainly consists of organic polymeric materials like polyester fabric and PET thin film. Mechanical tests are performed to measure the mechanical strength of the fabricated composite which has been submerged in corrosive environment for some time period, and to study possibly different failure behavior or mechanism of the composite when the sealing methods are different.