Search

Self-powered sensors are an important application development direction of nanogenerators. The development of fully self-powered systems that do not rely on traditional energy systems such as mains power or batteries is of great value to the future design of the loT. Such system design is not an easy task due to the detailed calculation of multiple units' energy consumption combined with smart design of minimizing the total consumption of the full system design. By converting energy such as wind energy into electrical energy and designing an indication system that simultaneously utilizes this energy, we completed a fully self-powered sensing system to transduce the wind strength of a high-speed rail. The self-powered sensor part of the system utilizes the modulus design of the pleated elastomer and at the same time achieves wind pressure-LED indication. The circuit is simplified by dropping the traditional control chips, decreasing the energy consumption, and increasing the system reliability. This crumple sensor system has a faster activation speed than that of other wind cup sensors and can sense the wind force when a train passes to protect the canopy structure. This system presents ideas for future designs of fully self-powered systems. [ABSTRACT FROM AUTHOR]

Microwave heating has attracted attention in heavy oil recovery and processing industry due to the benefits of volumetric, rapid and selective heating. The objective of this study is to prepare a microwave absorbing catalyst and examine its performance in catalytic upgrading of a heavy oil with microwave heating. It was found that oil viscosity decreased 90.00% and API gravity increased 1.24° after upgrading over a prepared catalyst. SARA analysis of upgraded oils showed that the contents of resins and asphaltenes decreased; meanwhile, saturates and aromatics contents increased. The participation of the catalyst in oil upgrading reactions was further confirmed by analyzing the hydrocarbons in gas product. [ABSTRACT FROM AUTHOR]

Microwave heating has attracted attention in heavy oil recovery and processing industry due to the benefits of volumetric, rapid and selective heating. The objective of this study is to prepare a microwave absorbing catalyst and examine its performance in catalytic upgrading of a heavy oil with microwave heating. It was found that oil viscosity decreased 90.00% and API gravity increased 1.24° after upgrading over a prepared catalyst. SARA analysis of upgraded oils showed that the contents of resins and asphaltenes decreased; meanwhile, saturates and aromatics contents increased. The participation of the catalyst in oil upgrading reactions was further confirmed by analyzing the hydrocarbons in gas product. [ABSTRACT FROM AUTHOR]