The traditional project driven teaching method is a popular teaching method of implementation of inquiry-based teaching model. However, students have the differences of the basic knowledge resulting in increasing the difficulty of the implementation of project-driven approach. This calls for revisiting the current project driven teaching process. The proposed teaching method of LTO (Learning, Training, Operating) by extending project-driven approach is presented to resolve the problems of traditional project driven teaching method challenging to teachers at universities. The LTO teaching approach encourages more students to participate in courses and stimulates outstanding students to have more developing room. At the same time, the students are led to closely track the up-to-date technology, inspired to research knowledge in-depth. Eventually, the new values are reflected in the area of engineering education from the closed university education to the open society one and from a single classroom to actual job positions. Finally, a case study are performed to testify the efficiency of the proposed model.

This paper describes using spectrophotometer and ARM in food safety detection system. Using the spectrophotometer as sensors will convert lead concentration and organophosphate pesticides concentration into optical signals. Data will be analyzed by ARM. This system can also complete photoelectric conversion, A/D conversion functions and complete light signal processing effectively. The hardwares are low prices, cost-effective, stable work, and easy to operate. This testing technology provides a reliable method for food safety detection.