1、外文文獻資料Distributed Temperature Sensor1.Sensor introduction1.1 Temperature sensor backgroundIn the human living environment, temperature playing an extremely important role。No matter where you live, engaged in any work, ever-present dealt with temperature under. Since the 18th century, industry since

2、the industrial revolution to whether can master send exhibition has the absolute temperature touch. In metallurgy, steel, petrochemical, cement, glass, medicine industry and so on, can say almost eighty percent of industrial departments have to consider the factors with temperature. Temperature for

3、industrial so important, thus promoting the development of the temperature sensor. 1.2 Temperature sensor developmentMajor general through three sensor development phase: analog integrated temperature sensor. The sensor is taken with silicon semiconductor integrated workmanship, therefore also calle

4、d silicon sensor or monolithic integrated temperature sensor. Such sensing instruments have single function (only measuring temperature), temperature measurement error is smaller, price low, fast response, the transmission distance, small volume, micro-consumption electronic etc, suitable for long d

5、istance measurement temperature, temperature control, do not need to undertake nonlinear calibration, peripheral circuit is simple. It is currently the most common application at home and abroad, an integrated sensor。Typical products have AD590 AD592, TMP17, LM135, etc.jAnalog integrated temperature

6、 controller. Analog integrated temperature controller mainly include temperature control switch, programmable temperature controller, a typical product have LM56, AD22105 and MAX6509. Some increase strength type integrated temperature controller (for example TC652/653) also contains the A/D converte

7、r and cure good sequence, this process with the intelligent temperature sensor some similarities. But it is not its system, work by micro processing device control, this is the main difference between. Intelligent temperature sensor. intelligent temperature sensor (also called digital temperature de

8、grees sensor) is in the mid 1990s launch. It is microelectronics technology, computer technology and the dynamic testing technology (ATE) crystallization. Intelligent temperature sensor internal contain temperature sensor, A/D converter, signal processor, memory (or registers) and interface circuit.

9、 Some products still take multiplexer, central control system device (CPU), random access memory (RAM) and read only memory (ROM). Intelligent temperature sensor is characteristic of temperature data and relevant can output the temperature control of the quantity, adaptation various micro controller

10、 (MCU);1.3 Single point and more temperature sensorThe development trend of the temperature sensor. In the 21st century, the temperature sensor is headed in high precision, multi-function, bus, standardization, high reliability and safety, development of virtual sensor and network sensor, research m

11、onolithic temperature measuring system and other high-tech direction develop rapidly. Sensors in the application temperature controlling system. Current market exists mainly single point and more two temperature measurement. For single point temperature foundment instrument, mainly adopts the tradit

12、ional analog integrated temperature sensor, which heat resistance, thermocouple sensors measuring accuracy, high measurement range, and got the general application. This product is temperature measuring range 200 mostly between 800 , resolution 12th, and least distinguishable temperature in 0.001 0.

13、01 between. Cabin LED display module, shows ranging from 4 to 16. Some instruments also has memory function, can store several hundred to a few thousand sets of data. This instrument can be very good meet a single user single-point measurement needs. More temperature measurement, relative and single

14、 point measurement precision has certain gap, although realized the multi-channel temperature measurement and control, but the price is expensive. In view of the present market situation, proposed this topic can satisfy requirements, scalable and cost-effective single-chip multi-channel temperature

15、measuring system. Through the first temperature sensor DS18B20 acquisition, and then through the C51 SCM processing and displayed on the digital tube, can be collected indoor or a greenhouse around in different locations of the temperature, with four digital tube to display. The first digital pipe d

16、isplay acquisition is which way, which channel. Three digital pipe display after the acquisition channel by temperature, accurate to 0.1 degrees.2. The system realized and related technologies2.1.The system is realizedBy the whole control system for core AT89C51, using four ways of temperature senso

17、r DS18B20 in production site for distribution area of four different temperature measurement result with the chip checking, collation store and display, and through the button control, temperature will process after the LED digital display to come out, and the software assurance system anti-interfer

18、ence capacity。four DS1820 connected to MCU respectively, this scheme four IO mouth occupy MCU four IO though, but the microcontroller IO mouth under the condition of mouth not shortage by this scheme greatly simplify programming difficulty, shorten the design cycle, also can guarantee the stability

19、of the system. A multipoint connection as shown“1-1”DS1820DS1820DS1820DS1820AT89C51MCUP1.0P1.1P1.2P1.3P3.4Display elementButton control unit1-1 multipoint connection2.2 .AT89C51 Chip introductionAT89C51 is a 4K bytes FLASH Memory (Erasable Programmable and FPEROM - FLASH for the campaigns with) low

20、voltage, high-performance CMOS eight microprocessors, commonly known as the microcontroller. AT89C2051 is a 2K bytes with flash memory can be erased programmable read-only memory , SCM can erase read-only memory can be repeated erased 1000 times. This device adopts ATMEL high-density non-volatile me

21、mory manufacturing technology manufacturing, and industrial standard MCS - 51 instruction set and output tube compatible. Due to the multifunctional 8 bits CPU and will be flashing on single chip combination of memory, ATMEL AT89C51 is a kind of high efficient micro controller, AT89C2051 is a stream

22、lined version. AT89C 51microcontroller as many embedded control system .Arrange appearance and pin as shown in figure 1-2 shown1-2 AT89C51 pins figureMajor features: and MCS - 51 compatible 4K bytes programmable FLASH memory life: 1000 write/wipe cycle data retention time: 10 years the static job: 0

23、Hz - 24MHz level 3 program memory lock 128 x 8 bits internal RAM 32 programmable I/O lines two 16 timer 5 interrupt source programmable serial channels low power consumption of idle and power lost mode piece inside oscillator and clock circuitTube feet explains:VCC: power supply voltage.GND: grounde

24、d.P0 Mouth: P0 mouth a eight leak level two-way I/O mouth open, every foot can absorb 8TTL gate current. When the pipe mouth P0 feet first write 1, defined as high resistance input. P0 can be used for external program data storage, it can be defined as the eighth data/address. In FIASH programming,

25、P0 mouth as the source-code input port, when FIASH check, the source-code P0 output, when P0 external must be pulled.P1 mouth: mouth is an internal P1 provide pull-up resistors 8-bit two-way I/O mouth, P1 mouth buffer can receive 4TTL gate current output. P1 mouth tube feet, was then write 1 for hig

26、h, pull up inside can be used as input, P1 mouth be external pull down for low electricity at ordinary times, will output current, this is due to internal pull up sake. In FLASH programming and calibration, P1 mouth as eighth address to receive.P2 mouth: for an internal P2 mouth on the 8-bit pull-up

27、 resistors two-way I/O port, P2 mouth to receive, the output buffer 4 TTL gate current, when P2 mouth is written 1, its tube feet are internal pull-up resistors, and push as input. And so as the input, P2 mouth feet are external down tube, will output current. This is due to internal pull up sake. P

28、2 mouth when used external program memory or 16 address external data memory access, P2 mouth high output address eight. In a given address 1, it using internal and external 8 address advantage, when for reading and writing data memory, P2 when the special function registers mouth output of content.

29、 P2 mouth in FLASH programming and the calibration eight address when receiving high signal and control signals.P3 mouth: P3 mouth pipe is 8 feet with internal pull-up resistors two-way I/O port, may receive four TTL gate current out put. When P3 mouth writing 1, they are internal and high level, an

30、d used as input. As input, due to external drop-down for low level, P3 mouth will output current (ILL) this is due to pull ups sake.RST: reset input. When oscillator reset device to keep RST feet high level two machine cycle time.ALE/PROG: when access external storage, address latch allows the outpu

31、t level of the position for latch address byte. During the FLASH programming, this pin for input programming pulse. In peacetime, the ALE with a constant frequency cycle output is the pulse signal, the frequencies of the 1/6 oscillator frequency. So it can be used against external output pulse or us

32、ed for timing purpose. However it is: whenever used for external data storage, will skip a ALE pulse. If you want to ban the ALE output can be in SFR8EH address for 0. At this time, only by performing the ALE MOVX, MOVC instruction is ALE to take effect. In addition, the pins were slightly up. If mi

33、croprocessor in external execution ALE, buy a ban is invalid./ PSEN: external program memory choice of communication number. By external program memory in during the instruction fetch, each machine cycle twice /PSEN effective. But on a visit to external data storage, the two effective/PSEN signals w

34、ill not appear./ EA/VPP: when/EA keep low levels in this period, the external program memory (0000H - FFFFH), whether have internal program memory. Note encryption method 1, / EA will RESET for internal focus; When/EA end keep high electricity at ordinary times, internal program memory here. During

35、the FLASH programming, this pin is also used VPP 12V programming power (on).XTAL1: the inverting oscillator amplifier input and input to the internal clock operating circuit.XTAL2: from reverse oscillator output.2.3.DS18B20 Chip introductionDALLAS latest digital temperature sensor DS18B20 profile ne

36、w 1-wire devices smaller, wider and voltage applied to the DALLAS semiconductor company more economic DS1820 digital temperature sensor is the world the first piece of support 1-wire bus interface temperature sensor. 1-wire bus unique and economic characteristics, the user can easily form sensor net

37、work for measuring system, the construction of a new concept introduction. DS18B20 1-wire bus with DS1820 digital temperature sensor DS18B20 also support as 1-wire bus interface, measuring temperature range for - 55 C + 125 C, in - 10 + 85 C range, precision C for + 0.5. Scene in 1-wire bus temperat

38、ure directly the digital mode, can greatly improve the system of anti-jamming.Suitable for the scene in the bad environment temperature measurement, such as: environment control, equipment or process control, temperature measurement of consumer electronics, etc. And the previous generation product i

39、s different, the new product support 3V 5.5 V voltage range, make the system design more flexibly and conveniently. But a new generation of products cheaper, smaller. DS18B20 can program sets 9 12 resolution, precision C for + 0.5. Optional smaller encapsulation way, more wide voltage range. Resolut

40、ion setting, and users set alarm temperature EEPROM, stored in power lost and still save. DS18B20 performance is the best product of new generation! Performance to price also is very good!DS18B20 New performance:(1) data available supply, voltage range: 3.0 5.5 V;(2) temperature measuring range: - 5

41、5 + 125 in - 10 + 85 to + 0.5 when precision;(3) programmable resolution for the 9 12, the corresponding can distinguish respectively , the temperature of 0.5 and 0.125 , by 0.25 0.0625 ;(4) 12 resolution in most 750ms temperature into digital within;(5) negative pressure characteristics: power at t

42、he polarity, thermometers wont because when heating and burned, but cant work normally.DS18B20 Appearance and internal structure: DS18B20 internal structure consists mainly of four parts: 64-bit photolithography ROM, temperature sensors, nonvolatile temperature alarm triggers TH TL, configuration an

43、d registers. DS18B20 tube feet arrangement is “1-3”， internal structure is“1-4”1-3 DS18B20 tube feet arrangement (1) DQ for digital signal input/output terminal;(2) GND for power;(3) VDD for external power supplies input (in parasitic power connection mode grounding).1-4 internal structure3. Debug s

44、imulation Proteus is Labeenter electronics company research UK EDA software. Proteus is not only the analog and digital circuit, d/a hybrid circuit design and simulation platform, but also is currently the worlds most advanced, the most complete various types of micro controller system design and si

45、mulation platform. It really realized complete on computer schematic design, from circuit analysis and simulation and single-chip microcomputer and grade debugging and simulation, code system test and functional verification of the PCB formation to complete the design and development process of elec

46、tronic. Proteus product series also contains a revolutionary VSM technology based on micro control, can the design with all peripheral electronic device simulation together. First start Proteus and Proteus components from the library selection need drawing diagram and set component, the correspondin

47、g element parameter values3.2. KeilcKeil Vision 2 is about the 8051 series MCU Keil company of development tools can be used to compile C source code, assemblers source program, connection and relocation target files and libraries, gen built: documents, debugging purposes procedure, etc, it is a kin

48、d of integration of document management compile environment. It integrates document editing processing, compile connection, project management, window, tools cited and software copy true debugging and other functions, is pretty powerful development tool. In keil inside compile, the procedures requir

49、ed commissioning3.3. alignment(1) detection TCP/IP.(2) duplicate the Proteus installation directory vdm51. Who folder keilc/C51 / DLL to bin directory. (3) modify the installation directory Keil tools. TDRV4 = BIN, add the DLL. VDM51. (4) in the schematic drawing Proteus, in Debug menu, select Use R

50、emote Debug hand .(5) in open in a project Keil, right-click Target1, choose for - Target Target 1. In the open dialog box select De - bug TAB, select and use VSM Proteus Emulator simulation (figure 6 shows), click Ok complete Debug Settings. 6 graph 6 such Keil Proteus and is connected, the simulat

51、ion results can be in Proteus or Keil. This circuit system USES 1-wire bus digital sensor DS18B20 to realize the collection of temperature, using seven segment digital tube data shows. Will program and simulation diagram realization circuit connected, simulation中文翻譯稿翻譯：蘇州大學 應用技術學院 07電子（學號0716408045）

52、 朱琳分布式溫度傳感器1傳感器簡介1.1溫度傳感器的背景在人類生活環(huán)境中，溫度扮演著一個極其重要的角色。無論你住在哪里，從事什么工作，都會與溫度打交道。自18世紀工業(yè)時代以來，工業(yè)革命對能否控制，發(fā)送顯示溫度有著絕對的聯(lián)系。在冶金、鍛鋼、石化、水泥、醫(yī)學等產業(yè)中，可以這樣說幾乎80%的工業(yè)部門不得不考慮溫度的因素。溫度對工業(yè)來說如此重要，因此也推動了溫度傳感器的發(fā)展。1.2溫度傳感器的發(fā)展傳感器主要大體經過了三個發(fā)展階段：模擬集成溫度傳感器。該傳感器是采用硅半導體集成工藝制成，因此亦稱硅傳感器或單片集成溫度傳感器。此種傳感器具有功能單一(僅測量溫度)、 測溫誤差小、 價格低、 響應速度快、 傳

53、輸距離遠、 體積小、功耗低，適合遠距離測溫、控溫，不需要進行非線性校準，外圍電路 簡單。它是目前在國內外應用最為普遍的一種集成傳感器，典型產品有 AD590、 AD592、TMP17、LM135 等；模擬集成溫度控制器。模擬集成溫度控制器主要包括溫度控制開關、可編程溫度控制器，典型產品有 LM56、AD22105 和 MAX6509。某些增強型集成溫度控制器(例如 TC652/653)中還包含了 A/D 轉換器以及固化好的程序，這些工藝與智能溫度傳感器有某些相似之處。但它自成系統(tǒng)，工作時并不受微處理器的控制，這是智能溫度傳感器和非智能之間的主要區(qū)別；智能溫度傳感器(亦稱數(shù)字溫度傳感器)是20世

54、紀90年代中期問世的。它是微電子技術、計算機技術和自動測試技術(ATE)的結晶。智能溫度傳感器內部都包含溫度傳感器、A/D 轉換器、 信號處理器、存儲器(或寄存器)和接口電路。有的產品還帶多路選擇器、中央控制器(CPU)、隨機存取存儲器(RAM)和只讀存儲器(ROM)。智能溫度傳感器的特點 是能輸出溫度數(shù)據(jù)及相關的溫度控制量，適配各種微控制器(MCU)。1.3單點與多點溫度傳感器溫度傳感器的發(fā)展趨勢：進21世紀后，溫度傳感器正朝著高精度、多功能、總線標準化、高可靠性及安全性、開發(fā)虛擬傳感器和網絡傳感器、研制單片測溫系統(tǒng)等高科技的方向迅速發(fā)展。傳感器在溫度測控系統(tǒng)中的應用：目前市場主要存在單點和

55、多點兩種溫度測量儀表。對于單點溫測儀表，主要采用傳統(tǒng)的模擬集成溫度傳感器，其中又以熱電阻、熱電偶等傳感器的測量精度 高，測量范圍大，而得到了普遍的應用。此種產品測溫范圍大都在-200800 之間，分辨率 12 位，最小分辨溫度在 0.0010.01 之間。自帶 LED液晶顯示模塊，顯示 4 位到 16 位不等。有的儀表還具有存儲功能，可存儲幾百到幾千組數(shù)據(jù)。該類儀表可很好的滿足單個用戶單點測量的需要。多點溫度測量儀表，相對與單點的測量精度有一定的差距，雖然實現(xiàn)了多路溫度的測控，但價格昂貴。 針對目前市場的現(xiàn)狀，本課題提出了一種可滿足要求、可擴展的并且性價比高的單片機多路測溫系統(tǒng)。通過溫度傳感器

56、 DS18B20 采集，然后通過 C51 單片機處理并在數(shù)碼管上顯示，可以采集室內或溫室中四處不同位置的溫度，用四個數(shù)碼管來顯示。第一個數(shù)碼管顯示所采集的是哪一路，哪個通道。后三個數(shù)碼管顯示所采集通道的溫度值，精確到0.1度。2 系統(tǒng)的實現(xiàn)及相關技術2.1系統(tǒng)的實現(xiàn)整個控制系統(tǒng)采用AT89C51芯片，采用多線連接，就是四個DS1820分別連接到單片機的四個IO口，采集到的溫度結果通過串口通信，然后芯片將采集到的數(shù)據(jù)處理，在外部顯示器顯示出來，并且能夠實現(xiàn)外部鍵盤的控制。溫度在LED液晶顯示屏顯示出來后，通過軟件編程確保系統(tǒng)有一定的抗干擾能力。這種方案雖然占用單片機的四個IO口，但在單片機IO口

57、不緊缺的情況下采用這種方案大大的簡化了編程難度，縮短了設計周期，同時也能保證系統(tǒng)的穩(wěn)定。多線連接方案的框圖如“圖1-1”所示 DS1820DS1820DS1820DS1820AT89C51單片機P1.0P1.1P1.2P1.3P3.4顯示單元按鍵控制單元 圖1-1 DS1820多線連接方案2.2.AT89C51單片機簡介AT89C51是一種帶4K字節(jié)FLASH存儲器（FPEROMFlash Programmable and Erasable Read Only Memory）的低電壓、高性能CMOS 8位微處理器，俗稱單片機。AT89C2051是一種帶2K字節(jié)閃存可編程可擦除只讀存儲器的單片機

58、。單片機的可擦除只讀存儲器可以反復擦除1000次。該器件采用ATMEL高密度非易失存儲器制造技術制造，與工業(yè)標準的MCS-51指令集和輸出管腳相兼容。由于將多功能8位CPU和閃存存儲器組合在單個芯片中，ATMEL的AT89C51是一種高效微控制器，AT89C2051是它的一種精簡版本。AT89C51單片機為很多嵌入式控制系統(tǒng)提供了一種靈活性高且價廉的方案。外形及引腳排列如圖“圖1-2”所示圖1-2 AT89C51引腳圖主要特性：與MCS-51 兼容 4K字節(jié)可編程FLASH存儲器 壽命：1000寫/擦循環(huán) 數(shù)據(jù)保留時間：10年 全靜態(tài)工作：0Hz-24MHz 三級程序存儲器鎖定 1288位內部RAM 32可編程I/O線 兩個16位定時器/計數(shù)器 5個中斷源 可編程串行通道 低功耗的閑置和掉電模式 片內振蕩器和時鐘電路管腳說明：VCC：供電電壓。 GND：接地。 P0口：P0口為一個8位漏極開路雙向I/O口，每