数据通信的可靠性受益于光隔离 是相当普遍的情况。但是,本文 所描述的电路是为光耦合实际串行连接本身的独特需要的应用而设计的。在这种应用中,微处理器控制的装置使用于河口湾和盐滩的浅水水下位置。这种装置用来收集河口湾沉积物的气体试样,其时间间隔范围从数日到数周。一个现场工作人员定期地乘小船到取样地点,用膝上型 PC机将命令传送到取样器微控制器存储器。本文电路 Reliability of data communications It is quite common to benefit from optical isolation. However, the circuits described in this article are designed for applications that require the unique needs of an optically coupled real serial connection. In this application, microprocessor controlled devices are used for shallow underwater locations in estuaries and salt flats. The device was used to collect gas samples of estuarine sediments at intervals ranging from days to weeks. A field crew regularly takes the boat to the sampling site and uses a laptop PC to send commands to the sampler microcontroller memory. This circuit