The Electronic Technology Laboratory of the Electrotechnics Teaching Experiment Center is an important laboratory of our university ’s electronic technology basic courses. It undertakes the experimental teaching tasks of analog circuit experiments, digital circuit experiments, special experiments and course design for nearly 80 undergraduates every year. The Electronic Technology Laboratory was established in 2000 and is an important project of the Tsinghua University 985 Project. It was built on the basis of the former Automation Department Electronics Laboratory, Electronic Department Electronic Circuit Laboratory, and Electrical Engineering Department Electrical Engineering Laboratory. The laboratory After being put into operation, the first task is to carry out experimental teaching reform, establish an experimental teaching system that matches the curriculum teaching system, and formulate a new experimental syllabus, with the emphasis on strengthening the cultivation of students' experimental abilities, innovative awareness, and cooperative spirit, and giving full play to the experiment The role of teaching in personnel training. In 2001, the laboratory developed a TES-1 electronic technology learning machine (hereinafter referred to as electronic technology learning machine) suitable for the characteristics of our school ’s electronic technology experimental teaching and cooperated with Tsinghua University Science and Education Instrument Factory. 160 units were produced and put into use in the autumn semester of 2002 until today. The learning machine has reached the requirements of experimental teaching in terms of function, technology and reliability, and has been well received by teachers and students, becoming one of the experimental teaching of electronic technology courses Small experimental platform.
2 Electronic technology learning machine design ideas Based on many years of experimental teaching experience, when designing the learning machine, we focused on the following points: ①The learning machine should be able to cover the experimental content specified in the new syllabus for each experimental course; ② Students provide an experimental environment for designing, installing, debugging, and testing the main performance indicators of electronic circuits; ③ Add necessary new functions to solve the problem of component testing during the experimental evaluation and experiment process; ④ The structure must be reasonable, highly reliable, and convenient service. ⑤ It must have strong versatility and a wide range of applications, and has the potential for further development and expansion.
3 Electronic technology learning machine constitutes the experimental unit ①Analog circuit experimental unit includes discrete component experiment, arithmetic circuit experiment and waveform generation experiment center office director Beijing: Tsinghua Publishing House, 2004 (Continued from page 54) Ming, premixed flame burning speed It has a linear relationship with the methane flow rate and air flow rate. It is the same as the result in (1) and is consistent with the theoretical description in 丨 6.
In addition, you can also do a measurement experiment of the height of the referral flame of the premixed partial flame of methane-air. It can be done by using interactive two-factor experimental design 丨 7 丨 or orthogonal experiment. Here we only list the conclusions: the influence of each factor on the experimental index (according to the flame height) is air flow, methane flow and length in order of size. measurement method.
5 Conclusions Through mathematical analysis of the experimental data, the characteristics of the significant influence of air flow under the premixed combustion of methane and air are proposed. Using experimental design and data processing knowledge, a set of standardized procedures for judging the flame combustion characteristics is established, which has important guiding significance for the undergraduate students' required study on the flame combustion experiment of Bunsen burner.
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