"Sensor Application and Technology" is an important course for science and engineering majors. It is a professional course for electronics, automation, mechatronics and other majors. Adhering to the principle of "skills-based, theory enough", combined with the requirements of the enterprise for the staff's sensor application ability, the teaching of the "Sensor Application and Technology" course has been reformed to truly reflect the practicality, openness and professionalism of the teaching process. and achieved better teaching results.
1. Course Features
The preamble knowledge of "Sensor Application and Technology" mainly involves the professional basic courses of "Electrical Technology" and "Electronic Technology". The teachers of the course group and the technical personnel of the enterprise formulated the basic requirements for the teaching of this course: master the characteristics and indicators of sensors; master the principles and applications of typical sensors; through the study of this course, students can master the working principles of commonly used sensor devices and basic measurement circuits and analysis and calculation methods; master commonly used sensor characteristics and usage methods; can consult information manuals, and can correctly select relevant sensor components; correctly use relevant detection instruments and meters; skillfully connect detection lines, and can design and control simple measurement and control systems Installation, commissioning, troubleshooting.
2. Student situation
Characteristics of students' professional qualities. The academic system of our college is 2.3+0.7, that is, the three-year period of higher vocational education, 2.3 is the period of studying in school, and 0.7 is the period of off-campus internship. This course is offered in the majors of electronics, automation, and mechatronics. Professional theoretical basis and practical ability of electronic technology.
From the perspective of the formation process of students' professional quality, senior students are shifting from learning basic theoretical knowledge to the process of forming professional skills. If the teaching of this course can be reasonably designed, it will play a key role in promoting students' learning and mastery of skills.
3. Teaching
(1) Redefine the teaching content
The members of the course team and professional technical personnel of the enterprise jointly determine the teaching content according to the needs of the enterprise. It is required that the students only need to know how to use and select the sensor. In the teaching, they only need to let the students understand the working principle of the sensor qualitatively and be familiar with its basic characteristics. Derivation of principled theories or theorems is not required. Students who are interested in this part of the content can study by themselves, and ask the teacher for advice or check the information by themselves if they have any questions. Focus on cultivating students' engineering awareness and practical skills.
For example: the middle temperature law of thermocouple sensor, as long as students understand the function of the law, master the method and precautions of cold junction compensation of thermocouple sensor, they can check the index table of thermocouple, and do not need to deduce the theorem in detail in class , students can self-study, and ask teachers after class if they have questions.(2) Reforms in theoretical teaching
1. Reforms in the review and preview session
The review and preview before class will play a multiplier role in students' mastery of knowledge, which is a common teaching method for teachers. In the review session, some teachers take the way of reviewing by themselves, and some teachers take the way of asking students. But the good habit of previewing seems to be no longer emphasized by teachers in university study. This course group reformed the pre-class review and preview.
The main measure is to issue preview and review task sheets for each theoretical class.
For example: when studying the "Second Module Resistance Sensor" and "Second Lecture on Gas Sensing, Humidity Sensing, and Thermistor Sensors", the preview review task list issued before class is:Review of the previous section:
Strain effect and classification of strain gauge resistance sensors.
Briefly describe the advantages and disadvantages of the three bridge outputs.
Briefly describe the four applications of strain gauge resistance sensors.
Preview:
Gain knowledge of electronic technology: the function of the differential amplifier and the calculation of the magnification.
Which thermal sensors, gas sensors, and humidity sensors have you found on the Internet, what new products and functions are there, and what information have you obtained?
This kind of preview effect is very good. For example, in the preview of the strain gauge resistance sensor section, a classmate found on the Internet that carbon materials can be used to make resistance sensors that can be strained at multiple points, and found out its use and talked about his own ideas. , that is, if this material is applied to robots, whether it is possible to make a robot that is the same as human skin. This idea was discussed enthusiastically during the "35+10" interactive time of this class, which strongly stimulated students' passion for learning this course. The teaching method of "35+10" is analyzed below.2. Reforms in making courseware
The course group systematically produced courseware for the course "Sensor Application and Technology". The courseware produced has two outstanding points. One is to make up for the lack of laboratory sensors. Industrial sensors are expensive, and the laboratory does not need to spend too much money to purchase them. , the course team teachers and enterprise technicians went to the enterprise to give the shape, parameters, and use precautions of industrial sensors in the form of PPT, which cultivated students' engineering awareness. In the form of expression, simulate the factory, move the factory into the classroom, and realize the integration of theory and practice.
For example: the temperature measurement of industrial platinum thermal resistance is widely used in industrial measurement, but the price is thousands of dollars, and the laboratory has not purchased it. Systematic courseware has been produced in terms of transmission and control; another example is one of the applications of photoelectric sensors: measuring the speed of the gear that drives the needle to correct the scale accuracy of the gas meter. The detection device made the speed measurement animation of the photoelectric sensor, the shape and parameters of the photoelectric sensor, and the actual installation position of the gas meter for detection.The course team realized the network of this course, and won the honor of the 2009 Excellent School-level Excellent Course and the 2010 Liaoning Province Network Course Second Prize. Share resources with teachers and students of the school.
3. Reform of students' classroom interaction
"35+10" is the teaching method reform of our college in 2010. Each class takes 10 minutes. Students ask questions and teachers answer them. The broad content of the questions can be the knowledge of this lesson or the knowledge of this course. Outlook on life and professionalism. Doing so can not only enable students to deepen and consolidate the learning of this course, but also promote the construction of teachers' morality and the self-improvement of the knowledge system.
(3) Reforms in experimental teaching
In the previous experiments, the teacher gave the experimental equipment, experimental circuit, experimental steps, and even the experimental results. It did not actively and effectively mobilize the students' initiative consciousness and skill training. The teaching method is still boring to learn. Now the teacher issues the experimental task list, and the students preview the experiment, obtain relevant information for this experiment, and determine the experimental plan. After being guided by the teacher, the students are divided into groups and teamwork to carry out the experimental operation. The team members conduct mutual evaluation on the members of the group, and fill in the experimental test sheet as the basis for the experimental results. The reform of the experimental part must be based on the opening of the laboratory. The hospital is equipped with special laboratory management teachers and is open from 1:30 to 4:00 pm every day. For example: "Use of Differential Transformer Sensor" experimental task list.