在1 000 k V皖电东送淮南至上海特高压交流输电示范工程一般线路施工中,由国家电网公司交流建设分公司推进的落地双平臂抱杆组塔工艺,在线路施工的各个标段已普遍采用。对于组塔施工中采用落地平臂抱杆使用效果与成本费用的因果关联,各...在1 000 k V皖电东送淮南至上海特高压交流输电示范工程一般线路施工中,由国家电网公司交流建设分公司推进的落地双平臂抱杆组塔工艺,在线路施工的各个标段已普遍采用。对于组塔施工中采用落地平臂抱杆使用效果与成本费用的因果关联,各施工参建单位都有自己的推论。现就笔者所在的上海送变电工程公司在本工程(21标段),组塔施工中采用落地平臂抱杆施工效果、成本费用为例进行简略分析。展开更多
The fabrication and simulation of an electromagnetic microrelay are presented based on micro electromechanical systems (MEMS) technique.The microrelay dimensions of about 4mm×4mm×0 5mm are fabricated with t...The fabrication and simulation of an electromagnetic microrelay are presented based on micro electromechanical systems (MEMS) technique.The microrelay dimensions of about 4mm×4mm×0 5mm are fabricated with the common technique of micromachining.Compared with the traditional relays,a planar coil is substituted for a solenoid coil to favor the MEMS fabrication.Moreover,a bi supporter cantilever beam with high sensitivity is fabricated to act as the movable electrode of the microrelay.Theoretical calculations and simulations are also carried out with respect to the electromagnetic force yielded by the exciting electromagnetic coil.The structure and parameters concerning the electromagnetic microrelay can be optimized using the results.展开更多
文摘在1 000 k V皖电东送淮南至上海特高压交流输电示范工程一般线路施工中,由国家电网公司交流建设分公司推进的落地双平臂抱杆组塔工艺,在线路施工的各个标段已普遍采用。对于组塔施工中采用落地平臂抱杆使用效果与成本费用的因果关联,各施工参建单位都有自己的推论。现就笔者所在的上海送变电工程公司在本工程(21标段),组塔施工中采用落地平臂抱杆施工效果、成本费用为例进行简略分析。
文摘The fabrication and simulation of an electromagnetic microrelay are presented based on micro electromechanical systems (MEMS) technique.The microrelay dimensions of about 4mm×4mm×0 5mm are fabricated with the common technique of micromachining.Compared with the traditional relays,a planar coil is substituted for a solenoid coil to favor the MEMS fabrication.Moreover,a bi supporter cantilever beam with high sensitivity is fabricated to act as the movable electrode of the microrelay.Theoretical calculations and simulations are also carried out with respect to the electromagnetic force yielded by the exciting electromagnetic coil.The structure and parameters concerning the electromagnetic microrelay can be optimized using the results.