【正文】 controlling table. It is able to call the universal USB drive program installed in system when assembling Driver Wizard for a specific task. Its working condition of devices, including transferring data whether or not correctly and controlling the transmission speed, can be measured by the drive program. If it cannot meet the application demands, a new drive program can be write down. Besides, the software for host puter. IV. APPLICATION RESEARCH OF TEMPERATURE MONITORING SYSTEM FOR POWER TRANSFORMERS Because of the limit of testing condition, the designed temperature monitoring system for transformers has no way to be checked under normal working conditions for transformer. Yet, a suit of temperature rising simulation experiment platform for transformer is designed and developed for this research purpose. In the experiment, transformer oil is storied in the inner of the actual transformer box body, a heater was used to simulate winding39。192。s temperature variation: such as the box body, the transformer winding, the iron core, and so on and it plays a significant role in supervisory control to the operation situation of transformers. II. HARDWARE DESIGN A. Overall plan of the developed system Its function of the designed hardware mainly includes two parts: data collecting and transferring Besides, the controlling circuit can be further expandedin order to control some protectors by using the relay switch. The designed principles are explained as follows: the monitored physical quantities must be firstly sampled by the temperature sensor (PT100, electric thermocouple, optical fiber sensor etc) and converted into the voltage signal, then the sampled voltage signals can be adjusted by regulative signal circuit to the standard signal39。s temperature variation: such as the box are often selected as the monitoring objects in the body, the transformer winding, the iron core, and so on, monitoring system of power transformer. The and it plays a significant role in supervisory control to the characteristic gases dissolved in oil can be monitored in operation situation of transformers. real time, which can help monitoring power transformer39。 C With the expansion of electric capacity and largescale extension of power grid, electric equipment is playing a significant role in modern life. At present, the technology of condition monitoring and fault diagnosing of power transformer has been made some improvement, yet its realtime performance and reliability still can39。 畢 業(yè) 設(shè) 計（論 文） 外 文 參 考 資 料 及 譯 文 譯文題目： 基于單片機的 油浸式 變壓器溫度監(jiān)測系統(tǒng) 的設(shè)計 學生姓名： 學 號： 專 業(yè)： 通信工程 所在學院： 指導教師： 職 稱： 2020 年 12 月 28 日 說明： 要求學生結(jié)合畢業(yè)設(shè)計（論文）課題參閱一篇以上的外文資料，并翻譯至少一萬印刷符（或譯出 3 千漢字）以上的譯文。t meet the requirement of safe production. Due to different thermal effects led by the natural or factitious fault, its temperature of oilimmersed power transformers is easy to change abnormally. An online measuring and controlling system based on MCU is discussed in this paper. In order to satisfy the requirement of state monitoring and fault diagnosis of power transformer on realtime and reliability, a kind of intelligent online monitoring instrument is designed. Each of its part is explained in this paper, including temperature signal collecting and data processing system. The simulation result showed the designed system was good in its realtime, reliability and running cost. Therefore, the designed state monitoring system for temperature and fault diagnosis of power transformer can be widely used in engineering and is expected to bring a bright future. Key words 168。s running station. But, it cannot satisfyinspection39。s range, and are converted into digital signal, after general line transmission to MCU for storage and processing, simulation/digital converting rate can be controlled by MCU. The takeover data queen may exist temporarily in the extended RAM, or transfer to the puter by USB. At the same time, MCU connect keyboard and LCD for the purpose of manmachine exchange [2]. The systematic block diagram of hardware system is showed in . 1) Chips Selection: A/D module selectionMAX125In order to avoid additional phase difference in the process of the data collecting, the synchronism collecting technology must be guaranteed for different signals. A synchronize data sampling chip MAX125 the MAXIM pany produces is selected and used in the designed circuit. MAX125 is 2161。5V and its measuring temp ranges from 50 to 200 . The AD204 is a generalpurpose used industry standard isolation amplifier, with twoport, transformer