PERANCANGAN ALAT POMPA AIR DENGAN SISTEM RENDAM PENGGERAKNYA MENGGUNAKAN MOTOR LISTRIK

The pump is a liquid suction device where its function is to drain a liquid from an area of small pressure to an area of large pressure. Submersible pump (submersible pump) is a type of pump where the work system is placed in full water, the pump is damaged if the water is not in full condition. This type of pump must have a drinking water level so that the pump can operate properly, and the life of the pump can last a long time. The submersible pump is one type of centrifugal pump. The centrifugal pump has a way of operating, the change from the fluid velocity then changes to moving as dynamically as possible through the vanes experiencing rotation in the pump housing. Keyword: Pump, Water, Centrifugal, Immerse

Fluviograph Design Based on an Ultra-Small Pressure Sensor

Groundwater dynamic monitoring of assessment points and evaluation areas has a significant predictive effect for controlling the occurrence of disasters. Obtaining water level and water temperature change data can provide important theoretical significance and reference values. However, in some remote areas of China, the measurement data concerning water level change are mostly obtained by manual measurement. This measurement method not only wastes manpower, but also cannot ensure the accuracy and real-time nature of the data. Therefore, this paper carried out research and design on a fluviograph, based on the relationship between hydraulic pressure and water depth. In the paper, the fluviograph used ultra-small pressure sensors to complete the data acquisition of the water level, a STM32L011 single-chip microcomputer (STMicroelectronics, Geneva, Switzerland) to process the data, and LabVIEW software to display the final data. Additionally, the water level data record and water temperature information record can be fed back to the user and the manager. After laboratory testing, the water level variation error range of this fluviograph was 1–2 cm, and the water temperature error range was less than 1 °C, which indicates the accuracy of the metrical data. The results show that the fluviograph realizes the function of automatically recording the water level and water temperature of the monitoring point, and it improves the social production efficiency greatly.

Effects of Imprinting Pressure on the Damage of Flexible Composite Mould and Pattern Quality during UV Nanoimprinting

Imprinting pressure is the significant factor for composite mould durability and pattern quality during UV nanoimprinting on complex surfaces. To solve these problems, the effects of imprinting pressure on the damage of flexible composite mould and pattern quality-encountering particles were investigated through experiment and simulation. It was found that increasing the pressure could improve the pattern quality, but it will damage the mould and reduce the durability. Moreover, too small pressure could lead to serious pattern defects. Therefore, the imprint pressure of 30 kPa was suitable for use in the imprinting process from the viewpoints of protecting the mould and reducing pattern defects. These findings will be useful for improving the pattern quality and mould durability.

FexNi100-x Thin Film Systems with Slight Deviations from Zero Magnetostriction Compositions: Focus on Pressure Sensor Applications

The structure, magnetic properties, ferromagnetic resonance and giant magnetoimpedance effect (GMI) were studied in FexNi100-x thin films and multilayered systems having compositions with small deviation from zero magnetostriction in order to find the best conditions for possible applications in the area of small pressure sensors. A comparative analysis of the effective magnetization and g-factor was carried out for the thin films of FexNi100-x (x = 19.8, 17.5, 15.0, 11.9) alloys. Comparison of the concentration dependences for static 4πMs and dynamic 4πMeff magnetization values allows to select a narrow interval of concentrations around Fe15Ni85 for the development of a microfluidic small pressure sensitive elements based on GMI effect. The maximum value of GMI ratio (ΔZ/Z) ratio shows linear dependence on the iron content in the FexNi100-x alloy for the concentration range under consideration.