基于USB接口的光照度记录仪的设计

Design of Illumination Recorder Based on USB Interface

基于USB接口的光照度记录仪既可以直接与PC机进行数据通讯,实现参数设置、数据存储、数据处理和参数曲线实时显示,也可通过U盘随时设置记录参数及提取数据,方便保存和处理数据。该仪器选用支持Host主机方式和Slave设备方式的USB接口芯片CH375B,在USB口插入U盘,就可以随时把光照度数据、采集者、采集地点、采集时间间隔等信息设置和提取。只要把记录仪与电脑连接,就可以在电脑上实时显示参数曲线,也可对采集的数据存储为EXCEL电子表格文件。为了满足用户不同的需求,记录仪具有手动或自动2种工作模式。

The recording instrument based on USB interface can communicate data with PC directly via USB interface,which realized parameter setting,data storage,data processing and the real-time displaying of parametric curve.The recorder can set recording parameter and extract data momentarily using flash memory disk,which was easy to save and process the data.Using the USB host-slave mode supported interface chip CH375B, the information like illumination data, collector,collecting location and time interval could be set and extracted when flash memory disk connected to the host.The curve parameters can be displayed in real-time and the EXCEL spreadsheet file could also be stored after the recorder and the computer were connected.The instrument had both automatic and manual working modes in order to meet the various users＇ demands.