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实用室温监测系统设计胡勇huyonggo@public1.sz.js.cn设计要求：1,测温传感头使用IN4148。2,测量范围：0-100度3,具有超限报警功能（继电器输出）可设定上限值、下限值，设定数据断电保存。4,尽可少的输入键设计,最好2键设计。设计工作:1，二极管及调理模块硬件设计（各级信号的匹配）2，键盘与显示软件界面设计，（进入设置后，输入位闪动，停止输入后一会儿自动保存数据）3，AD模块软件设计.4，设定值如何自动写入、读出软件设计.测量系统结构图被测对象MCU显示按键模拟量处理AD传感器非电量电量报警调理模块温度mV信号AD转换模块数字量输出模块键盘模块AT24C02单片机模块I2C总线模块LCD模块8155测温传感器设计目前常用的测温传感1，低温（DS18B20器件）2，高温（热电偶，热电阻）测温传感器：IN4148温度特性半导体二极管的温度特性温度升高时，二极管的正向压降将减小，每增加1℃，正向压降VF大约减小2mV，即具有负的温度系数。右图所示二极管的伏安特性曲线。前置测温调理电路原理图U1OP07U2OP07U3OP07D1IN4148R110kR210kR310kR510kR410kR610kRg5kR81kVCCW25KR7470VoutUA431VCC+12V+12V-12V-12VE1100UE2100UL1REDL2BLUER81KR91K+12V-12VE3100U-12V+12V调试验箱管脚定义+5v+5v-12v-12v+12v+12vGNDGND+5v+5vCH1CH2CH3CH4GNDGND焊接测温模块输入显示界面设计1,2键设计，其中1键移位，1键用于数值如何较正温度?增加。2,数据如何写入?3,显示器如何提示程序是在设置界面?以及正在修改的位置。前级放大电路设计选用运放同相、反相放大器的优缺点。基准源器件的选用。运放的选用单片机软件要注意的问题：使用中断的优缺点何时用定时器如何扩展数据空间提高运行速度的办法何时处理多任务调度使用模块电源模块(7805,7812,7912)单片机模块(STC89C58RD)LCD模块(LCD1602)键盘模块调理模块(OP07)AD模块(TLC1543)I2C模块（24C02)数字量输入、输出模块（继电器）I/O扩展模块（8155）调理模块电路图R9/10KR21/10KR13/5.1KR8/2KR10/2KR11/2KR12/5.1KR14/0RRPTD1/3.6VC7/104P12J3123J2123J1W2/1KW3TRIM1-IN2+IN3V-4NC5OUT6V+7VOS8U1/0P07TRIM1-IN2+IN3V-4NC5OUT6V+7VOS8U2/OP07TRIM1-IN2+IN3V-4NC5OUT6V+7VOS8U3/OP071TP11TP31TP21234567891011121314151617181920J51234567891011121314151617181920J4VCCVCCVCCVCC+12V-12V+12V-12VMCU电路图Y111.0592C10130PC10030PC1104C2104E122uFK1SW-PBR11KR2200R123456789RX14.7KP101P112P123P134P145P156P167P178INT012INT113T014T115EA/VP31X119X218RESET9WR16RD17PSEN29ALE30TXD11RXD10P0039P0138P0237P0336P0435P0534P0633P0732P2021P2122P2223P2324P2425P2526P2627P2728VCC40GND20U189C52D03D14D27D38D413D514D617D718Q02Q15Q26Q39Q412Q515Q616Q719VCC20OE1GND10LE11U274LS373VCCVCCVCCVCCVCCVCC1234567891011121314151617181920212223242526J21234567891011121314151617181920212223242526J112JP112JP212JP4CON212JP3VCC12J312J412J512J612J712J812J912J1012J1112J1212J1312J1412J1612J1712J1812J1912J2012J2112J2212J2312J2412J2512J2612J2712J2812J2912J3012J3112J3212J3312J3412J15P1,0P1,1P1,2P1,3P1,4P1,5P1,6P1,7RSTTXDINT1T1RDWRT0INT0RXDP0.1P0.0P0.3P0.2P0.5P0.4P0.7P0.6A1A0A2ALEP2.7P2.5P2.3P2.1P2.2P2.4P2.6P0.0P0.1P0.2P0.3P0.4P0.5P0.6P0.7EAP2.0A0A1A2P1.0P1.1P1.2P1.3P1.4P1.5P1.6P1.7INT1INT0P0.0P0.1P0.2P0.3P0.4P0.5P0.6P0.7P2.0P2.1P2.2P2.3P2.4P2.5P2.6P2.7RXDTXDT1T0RSTRDWRAD电路图1234J11234J212JP312J3R50RR41KC1104PC2104PC3104PA01A12A23A34A45A56A67A78A89GND10A911A1012REF-13REF+14CS15OUT16ADDRESS17CLOCK18EOC19VCC20U1/TLC1543DIN1CLK2CS3D04AGND5REF6OUT7VCC8IC1/TLC5615R21K1234567891011121314151617181920212223242526JP11234567891011121314151617181920212223242526JP2WR110KVCCZ1TL431VCCVCCVCCVCCVCCVCCIN1IN3IN2IN4D_IND_OUTI/OCLKTLC5615_CSTLC1543_CSADDATLC1543_CSD_INP2.3D_OUTP2.5I/OCLKP2.4AD_CSP2.7DA_CSP2.6toP1.1D_OUTD_INLCD电路图12J1C1104R1/10RGND1VDD2VO3RS4RW5E6DB07DB18DB29DB310DB411DB512DB613DB714BL115BL216U2VCCVCCVCC1234567891011121314151617181920212223242526JP2HEADER13X21234567891011121314151617181920212223242526JP1VCCVCCD0D1D2D3D4D5D6D7D0D1D2D3D4D5D6D7RSRSRWRWEELCD1602RE(P1.5),RW(P1.6),E(P1.7)D0..D7(8155PA)8155电路图C1104VCCVCCVCCVCCAD012AD113AD214AD315AD416AD517AD618AD719CE8RD9WR10IO/M7ALE11TMROUT6TMRIN3RESET4PC037PC138PC239PC31PC42PC55PA021PA122PA223PA324PA425PA526PA627PA728PB029PB130PB231PB332PB433PB534PB635PB736GND20VCC40U1/M81C55-51234567891011121314151617181920212223242526J11234567891011121314151617181920212223242526J2123456789RK10KPC0PC2PC4AD0AD2AD4AD6RESTCEWRRDIO/MALEAD7AD5AD3AD1PC5PC3PC1PB7PB5PB3PB1PA7PA5PA3PA1PB4PB2PB0PA6PA4PA2PA0PB6SS11SS22SS33SS55SS44SS66SS1SS2SS3SS4SS5SS6SS7SS8ZAZBZCZDZEZFZGZHPC0PC1PC2PC3PC4PC5PA0PA1PA2PA3PA4PA5PA6PA7PB0PB1PB2PB3PB4PB5PB6PB7SSXX(KEY)PA(LCD)PB(LEDnouse)KEY电路图S1S2S3S4S5S6S7S8S9S10S11S12S13S14S15S161234567891011121314151617181920212223242526J21234567891011121314151617181920212223242526J1VCCVCCSS1SS2SS3SS4SS11SS12SS13SS14(8155PC)24C02电路图Y1/32.768C1/104PC2/104PC3/104PC4/104PR1/4.7KR2/4.7KR61KR51KR31KR41K123J1123J3123456789J2D3/LEDD2/LEDD1/LEDD4/LEDA01A12A23P04P15P26P37VSS8P49P510P611P712INT13SCL14SDA15VDD16U4/PCF8574PA01A12A23GND4SDA5SCL6WP7VCC8U1/24C02OSCI1OSCO2INT3VSS4SDA5SCL6CLKOUT7VDD8U2/PCF8563PVCCSDA1SCL2OS3GND4A25A16A07VCC8U3/LM75VCCVCCVCCVCCVCCVCC1234567891011121314151617181920J41234567891011121314151617181920J5VCCVCCP3.4P3.5SDASCLADDR:1010ADDR:1010ADDR:1010ADDR:1001SDA(P3.4)SCL(P3.5)继电器电路图11223344556677889910101111121213131414151516161717181819192020J311223344556677889910101111121213131414151516161717181819192020J512J112J712J2123J6123J412345J8A1K2D3/1N4007B2C1E3Q3/9013Q1/9013A1K2C3E4OPT/P521A1K2D2xinhao3GND2Vcc1N1/IRM-3438C1/104PC2/104PR15/10KR23/5.1KR22/5.1KR21/5.1KR24/5.1KR18/330RR16/330RR19/330RR17/330RR13/0RR14/2KR12/0RR20/330R1122334455667788991010111112121313141415151616TLP521-411223344556677889910101111121213131414U2/74HC021122334455JDQ1/DC5VVCCVCCVCCVCCVCCVCC电源电路图C12104C8104C4104C10104C2104C6104F2F3C1116V/470uFC716V/470uFC316V/1000uFC935V/470uFC135V/1000uFC535V/470uFAC2V+1AC3V-4D2/BD1F1T2Vin1GND2+12V3U27812Vin2GND1-12V3U37912Vin1GND2+5V3U17805-12V+12V+5V1234567891011121314151617181920J11234567891011121314151617181920J212J3+5VR11R-12V+12V+12V-12VAC1AC