一种在线检测溶解氧的方法_朱亚明.pdfVIP

　　　　　　　　　　　　　　　　 32 7 　　　　　　　　　　　ELECTRONIC MEASUREMENT TECHNOLOGY 2009 7 　 朱亚明　 丁为民 (南京农业大学工学院　南京　210031) 　:, , 。, AT89S52 DS18B20 , 、。, , , , 。 :;;;DS18B20;AT89S52 :TP391.41　　:A Online measurement method for dissolved oxygen Zhu Ya ing　Ding Wei in (College of Engineering, Nanjing Agricultural University, Nanjing 210031) Abstract:This paper si ply expounds the working principle of dissolved oxygen probe of fil ulching Pri ary cell type, analyzes thete perature characteristics and for s the odel of the te perature characteristics of the sensor .Put forward an online easure ent of dissolved oxygen ethod, and use AT89S52 Single-chip co puter and single-bus digital te perature sensor DS18B20.The design of the hardware and software of the easuring syste is described in detail.Test data shows that changing te perature has an i portant effect on the easure ent of the dissolved oxygen. The ethod of which the hardware is si ple solves the proble of te perature drift of the sensor effectively, and achieves good perfor ance, and reduces the cost of the easure ent and control syste . Keywords:dissolved oxygen probe;te perature drift;single-bus;DS18B20;AT89S52 0 　　　 1　 ,DO 。, ,, , [2] ,、、 。(1) : 。 F ·A ·D i =n · ·CS (1) L 。, :i ;n ;A ,。