Multifunction Plasma Arc Equipment

A new type of plasma arc equipment with four functions including plasma arc welding, cutting, spraying and a surfacing process was designed and manufactured. To obtain good processing stability and multifunction integration, a silicon controlled rectifier (SCR), and the programmable controller (PC) were introduced. The operation of this new machine shows that it has the advantage of simple circuit design, flexible control pattern, low fault rate and easy maintenance.

多功能等离子弧装置

研制一种新型多功能等离子弧装置，它具有等离子弧焊接、切割、喷涂和喷焊四种功能。为了提高工艺过程的稳定性，并实现多功能集成一体化，设计中采用了先进的晶闸管整流技术和可编程序控制器ＰＣ机控制技术。实践表明，该装置具有线路简单、控制灵活、故障率低和维修方便等特点。

国产电动呼吸机控制系统的程控改进

本文针对目前一些国产呼吸机控制电路的缺陷，提出了用单片机程控系统取代原有的模拟电路控制系统的方法。改进后明显提高了呼吸机的稳定性，可靠性和安全性，且成本低，易于操作。经过临床实用，效果良好。