基于超声波的溶液浓度测量系统设计  

Design of solution concentration measurement system based on ultrasonic

作　　者：兰羽[1] 汪晓红[1] 周茜[1] 

机构地区：[1]陕西工业职业技术学院,咸阳712000

出　　处：《电子测量技术》2017年第5期134-137,共4页Electronic Measurement Technology

基　　金：陕西工业职业技术学院科研项目(ZK12-18)资助

摘　　要：在超声波时差法检测溶液浓度系统中,时间参量的检测精度只能达到微秒级,从而影响系统精度,为了提高溶液浓度检测精度,提出了超声波相位差法检测溶液浓度。在建立超声波相位差法模型的基础上,以单片机MSP430F2272作为处理器,采用双超声波收发为检测装置,设计了一种超声波的溶液浓度测量系统,选用数字鉴相器AD9901检测超声波通过标准样液与待测溶液相位差对应,经转换由单片机计算得到溶液浓度。实验表明,系统误差小于1%,并且装置性能稳定,结构简单,符合预期设计要求。In the detection of the concentration of the solution system of ultrasonic time difference method, only the detection precision time parameter reaches microsecond, which influence the accuracy of the system, in order to improve the detection accuracy of solution concentration, the ultrasonic phase difference method to detect the concentration of the solution. Based on the ultrasonic phase difference model, with MSP430F2272 MCU as the processor, dual ultrasonic transceiver for detection device design solution concentration measurement system of ultrasonic, the digital phase detector AD9901 ultrasonic detection by standard sample solution and the solution to be measured by the corresponding phase difference, converted by the SCM calculated concentration. The experiment shows that the system error is less than 1%, and the device has stable performance and simple structure, which meets the requirements of the expected design .

关 键 词：溶液浓度 超声波传感器 单片机MSP430F2272 数字鉴相器AD9901 

分 类 号：TN929[电子电信—通信与信息系统]