A control circuit for presetting,displaying,counting welding temperature cycles and automatically switching;
焊接温度循环次数预置、显示、计数及自动通断电控制电路
The paper introduces a circuit which can make out water quantity signals by eddy flow transform and preset water consumption with a dial switch so as to realize water supply digital control.
用蜗流变换方式将泵站输水管道内流量信号变为电量信号，用ＣＭＯＳ集成电路设计出泵站数控供水电路，需水量用拨盘开关设定（预置），当供水量达到预置水量时发出信号并由驱动电路使泵站机组停机。
Hard alloy powder of 25%Fe+15%Co+60%WC was directly pressed on the surface of substrate of carbon steel by hydraulic press and steel die to form precoated layer,and then laser cladding was conducted by using a high power CO_2 laser.
利用液压机和简易模具直接将硬质合金粉末(25%Fe+15%Co+60%WC)压制在碳钢基体上;采用大功率CO2激光器对预置层进行扫描,在一定工艺参数下得到了表面较为平整、无裂纹、与基体形成良好冶金结合的涂层;利用扫描电镜和显微硬度计对涂层进行成分、形貌和显微硬度分析。
The precoated layer was melted and cladded on substrate surface by using continuious wave CO_2 laser of high power.
利用液压机和简易模具将硬质合金粉末预置在基体上，并采用大功率CO_2激光器进行预置层的熔覆；借助ANSYS的APDL参数语言，模拟激光表面熔覆时的温度场，并在此基础上预测了激光表面熔覆工艺参数范围。
Investigation of characteristics of MPPC for pulse signal beams based on preset grating;
利用预置光栅的脉冲信号研究光互泵浦相位共轭特性