空心包体应力计温度补偿元件的设计及应用

第42卷第6期煤田地质与勘探Vol.42No.62014年12月COALGEOLOGY&EXPLORATIONDec.2014收稿日期:2013-07-26基金项目:(5110405551074065)(092102310312)作者简介:(1977—).文章编号:1001-1986(2014)06-0105-05空心包体应力计温度补偿元件的设计及应用刘少伟，樊克松，尚鹏翔(河南理工大学能源科学与工程学院，河南焦作454003):空心包体应力计广泛用于测量地应力，目前采用热敏电阻进行完全温度自补偿。通过对热敏电阻和DS18B20温度传感器进行综合比较和分析，发现采用DS18B20测量工作应变片的温度变化更有优势。设计了一种使用DS18B20作为敏感元件的测温电路系统，采用单片机进行控制，数码管进行显示，经实验室试验校核及在煤矿现场应用，证明了其可靠性和可行性。：空心包体应力计；温度补偿；温度传感器：TU458：ADOI:10.3969/j.issn.1001-1986.2014.06.022DesignandapplicationoftemperaturecompensatingelementofhollowinclusionstressgaugeLIUShaowei,FANKesong,SHANGPengxiang(SchoolofEnergyScienceandEngineering,HenanPolytechnicUniversity,Jiaozuo454003,China)Abstract:Thehollowinclusionstressgaugeiswidelyusedinmeasurementofgroundstress,nowthemethodwhichusesthermistorforcompletetemperaturecompensationiswidelyadopted.ThroughcomprehensivecomparisonandanalysisofthethermistorandtemperaturesensorDS18B20,itwasfoundthatDS18B20ismoresuitable.AcircuitsystemfortemperaturemeasurementusingDS18B20asthesensorwasdesigned,controlledbysinglechipmicrocomputerwithdigitaltubedisplay.Thecircuit,verifiedinlaboratoryexperiment,hasbeensuccessfullyappliedinmines.Keywords:hollowinclusionstressgauge;temperaturecompensation;temperaturesensor(SRM)[1-3][4]131513121151212[5]13[6]15[7-8][9]1℃DS18B20[10-11]DS18B20DS18B20[12]DS18B201设计思路1.1DS18B20DSl8B20(Dallas)[12]·106·煤田地质与勘探第42卷a.b.c.d.–55~+125℃–10~+85℃0.5℃1.2DS18B201DS18B203DS18B201Fig.1StructureoftheimprovedhollowinclusionstressgaugeDS18B202DS18B203DS18B20[13]2系统硬件电路设计2.1DS18B208SOCI2DS18B20Fig.2TheworkingprincipleofDS18B203GNDDQVCC3DS18B20120.0625160.0625/LSB℃DS18B20DS18B20AT89s52AT89s52AVRRISC8CMOS32[14]DS18B203.3V200µA2.2DS18B203U1AT89s52U2DS18B20D1P0P1,P2.4DSl8B20DQ3系统软件设计DS18B20[11]第6期刘少伟等:空心包体应力计温度补偿元件的设计及应用·107·3DS18B20Fig.3CircuitprincipleofDS18B20temperaturemeasurementsystem3.1DS18B20DS18B20a.初始化480μsDS18B20DS18B2015~60μs60~240μsb.ROM操作命令DS18B20ROMc.内存操作命令ROMd.数据处理DS18B2000113.24includeds18b20.hsbitDQ=P2^4;DS18B20_delay(unsignedinti)voidDS18B20_delay(unsignedinti){while(i--);}Init_DS18B20(void)DS18b20voidInit_DS18B20(void){unsignedcharx=0;·108·煤田地质与勘探第42卷DQ=1DS18B20_delay(8)DQ=0DS18B20_delay(80)DQ=1DS18B20_delay(10);x=DQDS18B20_delay(5);}ReadOneChar(void)unsignedcharReadOneChar(void){unsignedchari=0;unsignedchardat=0;for(i=8;i0;i--){DQ=0dat=1;DQ=1if(DQ)dat|=0x80;DS18B20_delay(5);}return(dat);}4Fig.4Flowchartofreadingtemperaturerealizedbysingle-chipmicrocomputer4实验分析4.1DS18B205DS18B205DS18B20Fig.5ContrastoftemperatureofincubatorandDS18B20temperature4.2DS18B203311表1测点的稳定应变值和温度值Table1Stablestrainvalueandthetemperatureatmeasuringpoint123456789101112A1A2A3A4B1B2B3B4C1C2C3C4A90A0A45A135B90B0B45B135C90C0C45C135/℃/℃132739437643747029681132228035542830925.426.8210957110103823574011247435360533110724928.830.2310348931000587633115268712517601177239110027.529.2第6期刘少伟等:空心包体应力计温度补偿元件的设计及应用·109·2表2测点地应力分量计算结果Table2CalculationresultsofgroundstresscomponentMPaσxσyσzτxyτyzτzx17.197.084.172.200.120.7227.5212.505.913.54–0.50–0.1039.4416.768.284.69–1.250.875结语a.DS18B20b.DS18B20c.DS18B20参考文献[1].[M].2000.[2].[M].1994.[3].()[J].20028(6)35–38.[4].[J].20104(5)353–354.[5].[J].199416(6)15–20.[6].[J].200610(9)2140–2145.[7].[J].19948(4)79–84.[8].[J].19953(7)25–32.[9].DS18B20[J].200810(18)157–159.[10].DS18B20[J].20126(8)53–56.[11].DS18B20[J].20086(9)59–62.[12].DS18B20[J].20098(16)225–229.[13].[M].2007.[14].[M].2005.(上接第104页)[10].Galerkin[J].200722(5)1539–1544.[11].Galerkin[J].201356(1)298–308.[12].[J].:201445(10)3513–3520.[13]ATLURISN.Themeshlessmethod(MLPG)forDomain&BIEdiscretiztions[M]EncinoUSATechSciencePress2004.[14]Petrov–Galerkinh[J]200936(1)68–71.[15].[J].201453(5)617–626.[16].[M].1994229–235.