Boaden R W, Hutton P
Anaesthesia. 1986 Apr;41(4):413-8. doi: 10.1111/j.1365-2044.1986.tb13230.x.
The theory and construction of a prototype digital gas flow controller are described. Using eight preset needle valves, it has the ability to deliver any flow from 50 to 12750 ml/minute in steps of 50 ml/minute. Under given conditions, the accuracy of this device is very high and its variation in performance with pipeline supply pressures is quantified. The required flow is requested from a BBC 'B' microcomputer which is interfaced with the equipment via a program written in Basic and the 1MHz bus port. The possible uses and potential of a microcomputer-controlled flow regulator in anaesthesia and intensive care are discussed.
本文描述了一种数字式气体流量控制器原型的理论与构造。该控制器使用八个预设针阀，能够以50毫升/分钟的步长提供50至12750毫升/分钟的任意流量。在给定条件下，该装置的精度非常高，并且其性能随管道供应压力的变化也已量化。所需流量由一台BBC“B”微型计算机发出请求，该计算机通过用Basic语言编写的程序以及1MHz总线端口与设备相连。文中还讨论了微型计算机控制的流量调节器在麻醉和重症监护中的可能用途及潜力。
