PIC16C71单片机控制的数字便携式pH仪的研制  

Development of a digital and portable instrument for pH-value measurement controlled by PIC16C71 microcontroller

作　　者：傅蓉[1] 李光明[1] 曹琳 

机构地区：[1]第一军医大学医工系,广东广州510515

出　　处：《医疗设备信息》2000年第5期13-14,共2页Information of Medical Equipment

摘　　要：pH值是液体内氢离子浓度的负对数 ,直接反映溶液的酸碱度。临床上血液 pH值是一项重要的检查项目 ,尤其对酸碱失衡的病人及时测出pH值并及时处理能缓解病情甚至挽救生命。目前临床上未见单独测量血液pH值的仪器 ,一般通过血气分析仪的多项检查结果中得出 pH值 ,等待时间较长。单片机控制的数字便携式 pH仪以单片机为控制中心 ,利用电极引出电信号 ,经放大、滤波、采样、模数转换、进行pH值的换算和数字显示 ,实现了床边测量血液 pH值 ,结果能在 1分钟内显示 。pH\|Value is negative logarithm of hydronium concentration inside liquid, which reflects acidity and basicity of liquid, In clinical ,blood pH\|Value is a important examination item, especially in unbalance between acid and base. According to the measured pH\|Value, dealing with patient in time can appease agony and save life indeed. At present, there is no instrument for only measuring pH\|Value. pH\|Value is obatined from several examination items of blood|gas analysis instrument, so latency time is long. A digital and portal instrument for pH\|Value controlled by microcontroller is developed. The small and portable instrument can measure pH\|Value on bed side, and results can be displayed digitally in one minute.

关 键 词：数字便携式 pH仪 PIC16C71单片机 不行制 

分 类 号：TH776.02[机械工程—仪器科学与技术]