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当前位置:首页 > 机械/制造/汽车 > 综合/其它 > 温度传感器优缺点的体现
.简述温度传感器应用和分类实际电路温度测量软件测试主要内容温度传感器是利用物质各种物理性质随温度变化的规律把温度转换为电量的传感器。它是温度测量仪表的核心部分,品种繁多。按测量方式可分为接触式和非接触式两大类,按照传感器材料及电子元件特性分为热电阻和热电偶两类。按照温度传感器输出信号的模式,可大致划分为三大类:数字式温度传感器、逻辑输出型温度传感器、模拟温度传感器。温度传感器的定义及类型接触式温度传感器接触式温度传感器的检测部分与被测对象有良好的接触,又称温度计。非接触式温度传感器它的敏感元件与被测对象互不接触,又称非接触式测温仪表。这种仪表可用来测量运动物体、小目标和热容量小或温度变化迅速(瞬变)对象的表面温度,也可用于测量温度场的温度分布。详情请拨--零二二--二七二三九零八二非接触测温优点:测量上限不受感温元件耐温程度的限制,因而对最高可测温度原则上没有限制。对于1800℃以上的高温,主要采用非接触测温方法。随着红外技术的发展,辐射测温逐渐由可见光向红外线扩展,700℃以下直至常温都已采用,且分辨率很高。导体的电阻值随温度变化而改变,通过测量其阻值推算出被测物体的温度,利用此原理构成的传感器就是电阻温度传感器,这种传感器主要用于-200—500℃温度范围内的温度测量。纯金属是热电阻的主要制造材料.热电阻的应用原理将两种不同材料的导体或半导体A和B焊接起来,构成一个闭合回路,当导体A和B的两个执着点1和2之间存在温差时,两者之间便产生电动势,因而在回路中形成一个大小的电流,这种现象称为热电效应。温度传感器热电偶就是利用这一效应来工作的。常用温度传感器热电偶可分为标准温度传感器热电偶和非标准温度传感器热电偶两大类目前,国际电工委员会(IEC)推荐了8种类型的热电偶作为标准化热电偶,即为T型、E型、J型、K型、N型、B型、R型和S型。热电偶测温基本原理温度传感器的工作原理测温电路为恒流电路,流经RT的电流是恒定的。当温度变化时,PT1000温度传感器的电阻值相应变化,由于流经温度传感器的电流不变,其上电压随着阻值的变化而变化,它反应的就是温度变化状况。温度测量的原理图温度传感器放大倍数调节由于元器件参数存在差异,最好在测试前,将温度传感器放入恒温液体,用电阻表测量传感器的电阻值,按照3.9欧姆对应1摄氏度的关系换算成温度,如果偏离此值,则调整RW5rx(串口通信)voidget_disp(void)interrupt4using0{if(RI)//如果是串口输入引起中断{//dis_port=SBUF;rev=SBUF;//testled=0;RI=0;}else{TI=0;testled=0;}//否则就是串口输出引起的中断}串口的应用例子key0key1key2key3key4key5key6key7key0key1key2key3key4key5key6key7key8key9key10key11key12key13key14key15key8key9key10key11key12key13key14key15XTAL218XTAL119ALE30EA31PSEN29RST9P0.0/AD039P0.1/AD138P0.2/AD237P0.3/AD336P0.4/AD435P0.5/AD534P0.6/AD633P0.7/AD732P1.01P1.12P1.23P1.34P1.45P1.56P1.67P1.78P3.0/RXD10P3.1/TXD11P3.2/INT012P3.3/INT113P3.4/T014P3.7/RD17P3.6/WR16P3.5/T115P2.7/A1528P2.0/A821P2.1/A922P2.2/A1023P2.3/A1124P2.4/A1225P2.5/A1326P2.6/A1427U2AT89C5101110000XTAL218XTAL119ALE30EA31PSEN29RST9P0.0/AD039P0.1/AD138P0.2/AD237P0.3/AD336P0.4/AD435P0.5/AD534P0.6/AD633P0.7/AD732P1.01P1.12P1.23P1.34P1.45P1.56P1.67P1.78P3.0/RXD10P3.1/TXD11P3.2/INT012P3.3/INT113P3.4/T014P3.7/RD17P3.6/WR16P3.5/T115P2.7/A1528P2.0/A821P2.1/A922P2.2/A1023P2.3/A1124P2.4/A1225P2.5/A1326P2.6/A1427U1AT89C5100100101rx(显示程序)voiddisplay(void){floatt;intdisp_value;uchardis_data[3];uchari;uchardis_sel=0xfe;t=((float)rev/2.04)*10;disp_value=(int)t;dis_data[2]=disp_value/100;disp_value=disp_value%100;dis_data[0]=(disp_value%10);dis_data[1]=(disp_value/10);for(i=0;i3;i++)//两位数码管,所以循环两次{P2=dis_sel;P1=dispcode[dis_data[i]];if(i==1)P17=1;dis_sel=_crol_(dis_sel,1);delay_10ms(2);}}在温度测试里的串口应用aleP10P11P12P13P14P15P16D0D1D2D3D4D5D6D7D0D1D2D3D4D5D6D732P10P11P12P13P14P15P16P17P171123XTAL218XTAL119ALE30EA31PSEN29RST9P0.0/AD039P0.1/AD138P0.2/AD237P0.3/AD336P0.4/AD435P0.5/AD534P0.6/AD633P0.7/AD732P1.01P1.12P1.23P1.34P1.45P1.56P1.67P1.78P3.0/RXD10P3.1/TXD11P3.2/INT012P3.3/INT113P3.4/T014P3.7/RD17P3.6/WR16P3.5/T115P2.7/A1528P2.0/A821P2.1/A922P2.2/A1023P2.3/A1124P2.4/A1225P2.5/A1326P2.6/A1427U1AT89C51OUT121ADDB24ADDA25ADDC23VREF(+)12VREF(-)16IN31IN42IN53IN64IN75START6OUT58EOC7OE9CLOCK10OUT220OUT714OUT615OUT817OUT418OUT319IN228IN127IN026ALE22U2ADC0808D5Q1CLK3Q2R4S6U4:A4013+5v234567891RP1RESPACK-8P100XTAL218XTAL119ALE30EA31PSEN29RST9P0.0/AD039P0.1/AD138P0.2/AD237P0.3/AD336P0.4/AD435P0.5/AD534P0.6/AD633P0.7/AD732P1.01P1.12P1.23P1.34P1.45P1.56P1.67P1.78P3.0/RXD10P3.1/TXD11P3.2/INT012P3.3/INT113P3.4/T014P3.7/RD17P3.6/WR16P3.5/T115P2.7/A1528P2.0/A821P2.1/A922P2.2/A1023P2.3/A1124P2.4/A1225P2.5/A1326P2.6/A1427U5AT89C51P1P2P3P4P5P6P7P8P1P2P3P4P5P6P7P8A3A2A1A1A2A3D2D1D2D1温度模拟aleP10P11P12P13P14P15P16D0D1D2D3D4D5D6D7D0D1D2D3D4D5D6D732P10P11P12P13P14P15P16P17P171123XTAL218XTAL119ALE30EA31PSEN29RST9P0.0/AD039P0.1/AD138P0.2/AD237P0.3/AD336P0.4/AD435P0.5/AD534P0.6/AD633P0.7/AD732P1.01P1.12P1.23P1.34P1.45P1.56P1.67P1.78P3.0/RXD10P3.1/TXD11P3.2/INT012P3.3/INT113P3.4/T014P3.7/RD17P3.6/WR16P3.5/T115P2.7/A1528P2.0/A821P2.1/A922P2.2/A1023P2.3/A1124P2.4/A1225P2.5/A1326P2.6/A1427U1AT89C51OUT121ADDB24ADDA25ADDC23VREF(+)12VREF(-)16IN31IN42IN53IN64IN75START6OUT58EOC7OE9CLOCK10OUT220OUT714OUT615OUT817OUT418OUT319IN228IN127IN026ALE22U2ADC0808D5Q1CLK3Q2R4S6U4:A4013+5v234567891RP1RESPACK-8R110kR21kR310kR410kC2100nC3105R575k+2.5VR61.35kR76.8kP100P10032184U3:AOPA2277P56784U3:BOPA2277PR3(1)V=-0.437478+5VRV1500R2(2)V=1.25001P100V=3.5787U3:A(IN+)V=1.25R6(2)V=-0.437478-5VD1D2aleP10P11P12P13P14P15P16D0D1D2D3D4D5D6D7D0D1D2D3D4D5D6D732P10P11P12P13P14P15P16P17P171123XTAL218XTAL119ALE30EA31PSEN29RST9P0.0/AD039P0.1/AD138P0.2/AD237P0.3/AD336P0.4/AD435P0.5/AD534P0.6/AD633P0.7/AD732P1.01P1.12P1.23P1.34P1.45P1.56P1.67P1.78P3.0/RXD10P3.1/TXD11P3.2/INT012P3.3/INT113P3.4/T014P3.7/RD17P3.6/WR16P3.5/T115P2.7/A1528P2.0/A821P2.1/A922P2.2/A1023P2.3/A1124P2.4/A1225P2.5/A1326P2.6/A1427U1AT89C51OUT121ADDB24ADDA25ADDC23VREF(+)12VREF(-)16IN31IN42IN53IN64IN75START6OUT58EOC7OE9CLOCK10OUT220OUT714OUT615OUT817OUT418OUT319IN228IN127IN026ALE22U2ADC0808D5Q1CLK3Q2R4S6U4:A4013+5v234567891RP1RESPACK-8P100XTAL218XTAL119ALE30EA31PSEN29RST9P0.0/AD039P0.1/AD138P0.2/AD237P0.3/AD336P0.4/AD435P0.5/AD534P0.6/AD633P0.7/AD732P1.01P1.12P1.23P1.34P1.45P1.56P1.67P1.78P3.0/RXD10P3.1/TXD11P3.2/INT012P3.3/INT113P3.4/T014P3.7/RD17P3.6/WR16P3.5/T115P2.7/A1528P2.0/A821P2.1/A922P2.2/A1023P2.3/
本文标题:温度传感器优缺点的体现
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