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1、摘要婴儿发育情况一直是父母关心的话题。父母一般通过测量婴儿体重来了解婴儿发育情况。普通的称在婴儿体检时操作不方便且测量误差很大。随着电子科技技术的飞速发展,智能电子称的出现为解决这个问题提供了帮助。本设计介绍了基于AT89S52单片机的数显婴儿体重测量仪的软硬件设计方法。在设计系统时,为了更好地采用模块化设计法,分步的设计各个单元功能模块,系统的硬件部分可以分为最小系统、数据采集、人机交互界面和语音系统四大部分。最小系统部分主要包括AT89S52和下载串口;数据采集部分由压力传感器、信号的前级处理和A/D转换部分组成,包
2、括运算放大器AD620和A/D转换器ADC0809;人机交互界面为键盘输入和点阵式液晶显示,主要使用4×4矩阵键盘和LCD1602显示器,可以方便的输入数据和直观的显示字符。语音系统以ISD1760为核心设计电路。软件部分应用单片机C语言进行编程,实现了该设计的全部控制功能。该婴儿体重测量仪可以实现基本的称重功能,并能进行语音播报体重,还可以把婴儿体重与标准体重进行比较,让父母了解婴儿的发育情况。整个系统结构简单,使用方便,功能齐全,具有一定的开发价值。关键词:电子称;单片机;语音系统;LCD显示;AbstractInf
3、antdevelopmenthasbeenatopicofconcernoftheparents.Theparentsusuallybymeasuringthebabyweighttotheunderstandingofinfantdevelopment.Ordinarythatisnotconvenienttooperateintheinfantmedicalexaminationandmeasurementerrorislarge.Withtherapiddevelopmentofelectronictechnolo
4、gy,theemergenceofintelligentelectronichelptosolvethisproblem.ThisdesignintroducesthehardwareandsoftwaredesignmethodbasedonAT89S52Microcontrollersignificantnumberofbabiesweighingmeter.Indesigningthesystem,thefourpartsinordertobetteruseofthemodulardesignmethod,theh
5、ardwareportionofthestep-by-stepdesignofeachunitfunctionmodules,thesystemcanbedividedintoaminimumsystem,dataacquisition,interactiveinterfaceandvoicesystems.ThesmallestpartsofthesystemincludingtheAT89S52anddownloadtheserialport;thefirst-levelprocessingofthedataacqu
6、isitionbythepressuresensor,signalandA/Dconversioncomponents,includingtheopampAD620andtheA/DconvertertheADC0809;interactiveinterfaceforkeyboardinputandthedotmatrixLCD,themainuseofthe4×4matrixkeyboardandLCD1602monitor,youcaneasilyinputdataandintuitivedisplaycharact
7、er.VoicesystemtotheISD1760asthecoredesignofthecircuit.ThesoftwarepartoftheapplicationmicrocontrollerCprogramminglanguage,allthecontrolfunctionsofthedesign.Theelectronicscalesforbasicweighingfunctions,andcanvoicebroadcastweight,youcanalsoputthebabyweightandstandar
8、dweight,sothatparentsunderstandthebaby'sdevelopment.Theentiresystemstructureissimple,easytouse,fullyfunctional,withacertaindegreeofdevelopmentvalue.Keywords:El