【正文】 nual[M],2010.[12] 陳桂友,柴遠(yuǎn)斌。單片機(jī)應(yīng)用技術(shù)[M].機(jī)械工業(yè)出版社,2008.附錄一：外文文獻(xiàn)以及中文翻譯Based on SingleChip MicroputerTemperature and Humidity Data Acquisition System DesignAbstractIn the actural production of life in many cases are to consider the influence of temperature and humidity environment and precise control, Then came the data acquisition system. Because the CAN bus can improve anti173。jamming ability and reliability of the data, corrective ability etc. Therefore, use the CAN bus interface to transfer data then monitored by the upper machine. This article introduced data acquisition system design posed of temperature and humidity sensor, the SCM system, puter, the can bus. After SHT75 digital temperature and humidity sensors collect the temperature and humidity measurement data in warehouse room, to send data to C8051F060 SCM system through the bus SCM do simple rapid processing of data through the CAN bus interface to the puter for realtime monitoring. Through testing, the system can realize data acquisition, processing and munication. Keywordstemperature and humidity sensor, C8051F060, data acquisition, CAN bus)I. INTRODUCTIONBecause of IC manufacturing technology unceasing enhancement, The emergence of a high performance, high reliability singlechip DAS data acquisition system. Data collection technology has bee a specialized technical, in the industrial fields have been extensively applied, data acquisition system USES more advanced module type structure, according to the different application requirements through simple increase and changed module, and bining with the system programming, can expand or modifY system, quickly posed a new system . Temperature and humidity data acquisition system is always relevant scientific research units and the pany mitted to developing project, its early system in monolithic puter 8031 core, using thermistors and wet sensitive capacitance as temperature sensor and humidity sensors, the whole system, while low cost, but the large size and low accuracy, munication distance restricted, poor universality, To overe the shortings, this paper studies based on singlechip processor of temperature and humidity data acquisition system, realize to warehouse room scene of temperature and humidity monitoring, has the good realtime, high precision, simple and convenient, signal transceiver easy maintenance and use of advantages .II. BASED ON SINGLECHIP MICROCOMPUTERTEMPERATURE AND HUMIDITY DATA ACQUISITIONThrough CS051F060 singlechip microputer control SHT75 digital temperature and humidity sensors measuring storehouse room temperature and humidity, and will send data through bus interface CS051F060 SCM system, after microcontroller simple rapid processing in through a CAN bus interface teleport to PC monitor.A. The CAN transmit driver modules The CAN transmit driver module by microcontroller hardware CS051 F060, highspeed light TLP 113 and isolation TJA I 050 highspeed The CAN transceiver devices such as position. Among them, CS051F060 realize The CAN bus of application layer function, TJAI050 realize The CAN bus physical layer and the data link layer function. This module mainly used to upward place machine to send temperature and humidity data and accept control mand. TJAI050 CAN provide differential for bus sending function, CAN provide differential accept controller function, and fully ply with ISO l1S9S standard, high rate, low electromagnetic radiation, wide range of differential receiver input, CAN fight electromagnetic interference, not on electricity for bus nodes are not caused by interference, sending data (TXD) control overtime function, in transient automatically to bus pins for protection, the input stage and V device patible, and thermal protection for power and land, to prevent the shortcircuit function.B. Power supply circuit The whole system is stable, reliable work is the basis of a stable power supply, switching is by power conversion chip MAX165S and electrical isolation chip B0505S devices such as position. 5V turn V power supply module through external power supply MAX165S will convert 5V V, for CS051F060 singlechip microputer and SHT75 digital temperature and humidity sensors power supply. 5V power isolating module through will 5V power isolating into two parts, respectively for every light on both ends of the devices. Power isolating chip B0505S has the constant pressure input, the single output voltage isolation efficiency high power supply module (SO%), small volume, low price, high reliability, high impact, isolation characteristics, temperature scope width (40 176。C — + S5 176。C), etc. In order to ensure efficient and reliable operation of the module can be rated load, and the output of 5% —100% load between, should avoid longterm work in noload condition. C．Temperature and humidity data acquisition and processing Temperature and humidity data acquisition system is made up of the following parts, 1) and humidity sensor SHT75。 2) CS051 F60 microcontroller, 3) The CAN bus interface circuit 4) Pc. The system frame as shown in figure1. Using CS051F060 MCU mouth to virtual DATA, using OAT A mouth to virtual clock lines, thus directly with SHT75 digital temperature and humidity sensors connected and carries on the control, after power up SHT75 after 10ms time came into sleep mode, before this should not transmit any orders. When make OAT A line at a high levels, triggering SCK nine times above (contain nine times), and then send a transmission start mand to activate SHT75, chip is evocation. Then an measurement mand (measuring temperature mand for 00000011, measuring relative humidity orders for 00000101), I1C will start SCK until plete measurement. Will then enters drawn into a low level, I1C again re