电气工程毕业设计外文翻译原文.docx

1、电气工程毕业设计外文翻译原文西 南 交 通 大 学本科毕业设计外文翻译年 级: 学 号: 姓 名: 专 业: 指导老师 xx 年xx、月 院 系 xxx 专 业 电气工程及其自动化 年 级 xx 姓 名 xxx 题 目 外文翻译 指导教师评 语 指导教师 (签章)评 阅 人评 语 评 阅 人 (签章)成 绩 答辩委员会主任 (签章) 年 月 日Design of Temperature Control Device Underground Coal Mine Based on AT89S52ABSTRACTAbstract-Temperature underground coal mine i

2、s an important index, especially for mining workers underground. To monitor the temperature effectively, a temperature measurement and control system is necessary to design. Temperature value is displayed on LED screen on line. When temperature value reaches the maximum, conditioning device connecte

3、d with the opening end of the relay controlled by the MeV will start up. Temperature signal and control information is all transmitted by wireless signal transmission module nRF905. The system program consists of transducer control and display of the temperature value. The control program of transdu

4、cer is compiled according to its communication protocol. Program of wireless data transmission should be debugged between the data transmission modules. Alarm device is designed to provides effective information to workers when the temperature value is unusual. Thus monitoring of the temperature und

5、erground coal mine can be real and effective.Keywords: Index Terms-DS18B20, AT89S52, nRF905, coal mine temperature controlI. INTRODUCTIONThe environment underground coal mine is poor, and various dangers can easily occur. Therefore, in order to ensure safe production of coal mine, it is needed to su

6、pervise various parameters underground coal mine, including temperature, pressure, gas, wind speed and distance. Timely monitoring temperatures of some mine key points and coal face is an important monitoring project to guarantee safe production. Moreover, the ultrasonic measurement of distance is u

7、sually used in coal mine, to ensure the accuracy of measurement, it is also needed to make accurate temperature measurement. Traditional temperature measurement is done by classical isolated sensors, which has some disadvantages as follows: slow reaction rate, high measuring errors, complex installa

8、tion and debugging and inconvenient long-distance transmission. In this paper intelligent temperature measurement and control is realized by taking DS18B20 temperature sensor and AT89S52 MCU as platform. DS18B20 has some advantages, mainly including digital counting, direct output of the measured te

9、mperature value in digital form, less temperature error, high resolution, strong anti-interference ability, long-distance transmission and characteristic of serial bus interface. Comparing with the traditional method of temperature measurement, MCU temperature measurement can achieve storage and ana

10、lysis of temperature data, remote transmission and so on. DS18B20 sensor is a series of digital single bustemperature sensor made in DALLAS company ofUSA.III. DESIGN OF HARDWARE FOR TEMPERATURE CONTROL SYSTEMThe device is composed of the temperature sensor DS18B20, MCU AT89S52, display module and re

11、lay for main fan control. The principle diagram of this hardware is shown in Fig.l.DS18B20 temperature sensor converts the environmental temperature into signed digital signal (with 16 bits complementary code accounting for two bytes), its output pin 2 directly connected with MCU Pl.2. Rl is pull-up

12、 resistor and the sensor uses external power supply. Pl.7 is linked to relay and PO is linked to LED display. AT89S52 is the control core of the entire device. Display modules consists of quaternity common-anode LED and four 9012. The read-write of sensor, the display of temperature and the control

13、of relay are completed by program control ofthe system. 2III. DESIGN OF SIGNAL WIRELESS TRANSMISSIONTested signal is transmitted by wireless mode, as shown in Fig. 1. Wire transmitting of signal underground coal mine has some disadvantages: 1) The mineral products are mined by excavation of shaft an

14、d tunnel. Meanwhile, there are so many equipments used underground coal mine. Therefore, it is more difficult to wiring in shaft and tunnel, and environmental suitability is poor for wire transmitting of signals; 2) Support workers should check up cables for transmitting signals at any moment when c

15、ombined motion of the coal machine support occurs. Thus, workers labor intensity is increased;3) The long-distance transmission of sensing element with contact method may lead to larger errors. To reduce errors, the long-distance line driver and safety barrier are needed. Thus, the cost is increased

16、;4) The work load of maintenance underground coal mine is larger.Figure 1. Structure diagram of signal wireless transmission systemBy contrast, adopting wireless data transmission can effectively avoid the above disadvantages. 3Wireless signal transmission module nRF905 is used in the design. Its ch

17、aracteristics are as follows: Integrated wireless transceiver chip nRF905 works in the ISM band 433/868/915 MHz, consists of a fully integrated frequency modulator, a receiver with demodulator, a power amplifier, a crystal oscillator and a regulator. Its working mode of operation is Shock Burst. Pre

18、ambles and CRC code are automatically generated in the mode, and can easily be programmed through the SPI interface. Current consumption of the module is very low. When the transmit power is +10 dBm, the emission current is 30 rnA and receiving current is 12.2 rnA. It also can enter POWERDOWN model

19、to achieve energy-saving. 4IV. SOFTWARE DESIGNFor doing the read-write programming for DS18B20, its read-write time sequence should be guaranteed. Otherwise, the result oftemperature measurement will not be read.Figure 2. Software design flow chartTherefore, program design for operation on DS18B20 h

20、ad better adopt assembly language.5 Software design flow chart is shown in Fig.2.Structure of Main program for temperature measurement is shown as following:INIT 1820:SETB DINNOPCLRDINMOV RO,#250TSRI: DJNZ RO,TSRISETB DINNOPNOPNOPMOV RO,#60TSR2: DJNZ RO,TSR2JNB PI.0,TSR3LJMPTSR4TSR3: SETB FLAGILJMPT

21、SR5TSR4: CLR FLAG1LJMPTSR7TSR5: MOY RO,#6BHTSR6: DJNZ RO,TSR6TSR7: SETB DINSETB DINRETGET TEMPER:SETB DINLCALL INIT 182018 FLAG1,TSS2RETTSS2: MOY A,#OCCHLCALL WRITE 1820MOY A,#44HLCALL WRITE 1820LCALL DELAYLCALL DELAYLCALLDELAYLCALLDELAYLCALL DELAYLCALLDELAYLCALL INIT 1820MOY A,#OCCHLCALL WRITE 1820

22、MOY A,#OBEHLCALL WRITE 1820LCALL READ 1820RETWRITE 1820:MOY R2,#8CLRCREAD_l 820:MOVR4,#2MOV Rl,#29HREOO: MOV R2,#8REOl: CLR CSETB DINNOPNOPCLRDINNOPNOPNOPSETB DINMOVR3,#9ADJUST_TEMPER:CLR TEM_BITJNB 47H,AJUSTSETB TEM_BITXRL TEMPER_L,#OFFHMOV A,TEMPER_LADDA,#OlHMOV TEMPEL,AXRL TEMPER_H,#OFFHMOV A,TEM

23、PER_HADDCA,#OOHMOV TEMPER_H,AADJUST:MOV A,TEMPER_LMOV B,#lOODIVABMOV B_BIT,AMOV A,BMOV B,#lODIVABMOV S_BIT,AMOV G_BIT,BDISP MAIN:LCALL D_DISPLCALL G_DISPLCALL S_DISPLCALL B_DISPMOV A,#OFFHLCALLDISPMOV A,#OFFHLCALL DISPMOV A,#OFFHLCALLDISPMOV A,#OFFHLCALL DISPLCALLDELAYRETD DISP:MOVC,D_BITJC D DISPIM

24、OV A,#03HLCALL DISPRETD DISPl:MOV A,#49HLCALL DISPRETG DISP:MOV A,G_BITMOV DPTR,#TABMOVC A,A+DPTRANLA,#OFEHLCALL DISPRETS DISP:MOV A,S_BITMOV DPTR,#TABMOVC A,A+DPTRLCALL DISPRETB DISP:JNB TEM_BIT,B_DISMOV A,#OfdhLCALL DISPRETB DIS:JB l8H,B_lMOV A,#OffhLCALL DISPRETB 1: MOV A,#03HLCALL DISPRETDISP: C

25、LRCMOVR2,#8DIS: RRCAMOVDAT,CCLRCLKSETBCLKCLRCLKDJNZ R2,DISRETDELAY: MOV R3,#80hDl: MOV R4,#OfEhDJNZ R4,$DJNZ R3,DlRETTAB:DB 03H,9FH,25H,ODH,99HDB 49H,4IH,IFH,OIH,09HENDV. CONCLUSIONThe performance of measurement-control device mainly depends on the performance of sensing element, the processing circ

26、uit and the transmission efficiency of collected data. Digital temperature sensor DSl8B20 and processing chip AT89S52 have characteristics of good technical indexes, and the field operations indicate that circuits system has many advantages, such as accurate data detection, good stability and easy a

27、djustment.After industrial operation test, the system is excellent for worst mine environment, which provides powerful assurance for safe production in the coal industry, and brings good economic and social benefits.REFERENCES1 WANG Furui, Single chip microcomputer measurement and controlsystem comp

28、rehensive design, Beijing University of Aeronautics andAstronautics Press, 1998.2 XIA Huguo, Technology application in automation combined-miningface, Shaanxi Coal, 2007.3 SHA Zhanyou, Principle and application of intelligent integratedtemperature sensor, Mechanical Industry Publishing House, 2002.4

29、 CAO Shujuan, HE Yinyong, GUO San-rning, On-line temperaturemeasuringsystem involving coal mine, Journal of Heilongjiang Instituteof Science & Technology,7(2005)5 SUN Xiaoqing, XIAO Xingming, WANG Peng, Design of MeasuringSystem for Rotating Speed of Hoist Based on Virtual Instrument, CoalMine Machi

30、nery, 12(2005).基于AT89S52煤矿井下的温度控制装置的设计摘 要煤矿井下抽象温度是评价学术期刊的重要指标,特别是对在地下工作的采矿工。为了有效地监控温度，进行温度测量和控制系统的设计是很有必要的。温度是显示在屏幕上的，当温度达到最大时，通过MeV控制的以开放的空调设备连接的继电器将开始工作,温度信号和控制信息都是通过无线信号传输模块nRF905。该系统由变频器控制程序和显示温度值组成，传感器的控制程序是根据它自己的通信协议进行编制的。无线电数据传输程序应该在数据传输模块中进行。报警装置的设计是向工人为了提供温度异常的有效的信息。通过这样进行煤矿井下的温度检测可以是真实的和有效

31、的。关键字：DS18B20, AT89S52, nRF905，煤矿的温度控制I 介绍煤矿井下的环境很差,各种各样的危险会很容易发生。因此,为了确保煤矿安全生产，需要监督煤矿井下各种参数,包括温度、压力、气体、风的速度和距离。及时对一些矿藏的关键点和和采煤工作面进行温度监控是保证安全生产的一种重要监控，此外,超声波测量距离通常是用于煤矿，有利于保证计量的精确，它被用来做出准确的温度测量，有利于保证计量的精确, 还需要作出准确的温度测量。传统的温度测量是由经典的孤立传感器，它的缺点如下：缓慢的反应速率、高测量误差、复杂的安装、调试和不方便远距离传输。在这篇论文里，智能温度监控和控制已经通过DS18B20温度传感器和以AT89S52单片机为平台而成为现实。DS18B20具有一些优势,主要包括数字计数，直接以数字的形式输出测量的温度，更少的温度误差，分辨率高、抗干扰能力强的特点, 远距离输送和串行总线接口。与传统的温度测量方法比较，单片机实现了温度测量的温度数据存储和分析、远程传