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We report on the circuit design and experimental demonstration of a battery-less, self-powering temperature sensor node, powered entirely by a piezoelectric (PZE) ambient vibrational energy harvester, and enabled by a novel ultra-low-power application-specific integrated circuit (ASIC). The ASIC collects and stores energy generated by the PZE transducer into a supercapacitor, powers both the on-ASIC...
In the context of underground cavern facilities, electrical power substation is now located underground instead of the conventional aboveground. The operating environment of power system has therefore changed, which may directly degrade the heat dissipation capability of the power system. A condition monitoring and reliability analysis of power facilities for underground substations in high humidity,...
To study the influence of temperature on partial discharge (PD) statistics and endurance of inverter-fed motor insulation, experiments were carried out focusing on enameled wires tested under bipolar repetitive square wave voltages at different temperatures. The PD pattern, delay time, amplitude and life were obtaiaed according to a large amount of test results. Experimental results show that the...
We report on experimental demonstration of a wireless temperature sensor node (WTSN) powered by a piezoelectric resonant energy harvesting system. The energy harvesting circuit stores the energy generated by a piezoelectric resonant transducer into a capacitor, and uses the stored energy to power the temperature sensor and its associated signal processing circuits for wireless signal transmission...
In order to monitor curing process of epoxy resin in real time, the system for cure monitoring is established based on Fiber Bragg Grating. First, a bare FBG, a FBG packaged with quartz capillary and an accurate resistance thermometer are closely stacked into a special mould. Then the mould is filled with mixture of epoxy resin and curing agent. Finally they are heated and cured together in the temperature-controlled...
A novel power-interrogated sensor allowing for simultaneous measurements of the temperature and the strain is firstly proposed and experimentally demonstrated, which is based on the utilization of a linearly chirped fiber Bragg grating (FBG).
In order to monitor curing process of epoxy resin, the special system was established based on Fiber Bragg Grating (FBG). A bare FBG, a FBG packaged with quartz capillary and an accurate resistance thermometer were immersed into mixture of epoxy resin and curing agent, and were used to monitoring the whole curing process. The changes of temperature inside epoxy resin were detected by resistance thermometer...
In recent years, as coal prices rise, especially the poor coal prices remain high, and has been in short supply in the state, resulting in increasingly high cost of power generation and operating profit has been declining. This study used the ways of high-temperature heating furnace smoke plus cold wind sent pink to improve the dry milling system and explosion capabilities.
In consideration of bare Fiber Bragg Grating being fragility, an approach of polymer and copper capillary package for FBG is proposed in this paper. FBG is coated with acrylate. After second coating, FBG is packaged into a blank copper capillary. FBG can expand or contract freely without strain. The second coating protects bare FBG from damage. The comparison of the experimental results between coated...
This paper presents a new mathematical model of a solar module. Solar module temperature, solar radiation and its effect on series resistance are taken into account in the model. The experimental data of the solar module under natural environment condition have been obtained to determine the model parameters. Then, the developed model is used to simulate energy yield of the solar module. This energy...
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