Development of a system for measuring teacher movements using a laser distance sensor

Different characteristics were found in individual check individually by making our rounds in the classroom between Skilled teachers and inexperienced teachers. Skilled teachers are taking a view from multiple items such as learner and learner's materials. On the other hand, It is suggested that those with no teaching experience are not able to see from multiple items. These surveys are based on analysis of video recordings, and the results cannot be said to be the same for everyone. A case study of quantitative analysis of check individually by making our rounds in the classroom and a method using RFID tags is reported. In this method, RFID tags are placed every in the classroom aisles to obtain the location information of the teacher. However, it is difficult to install sensors. In this research, we focused on laser range sensor mounted on robots and other devices. The goal is to develop a system for analyzing check individually by making our rounds in the classroom with a single device, The purpose of this research is to develop a system that measures the position of a teacher and trajectory recording of the teacher from the head of the teacher as he or she moves upright in the classroom by using a laser range sensor. The laser range sensor used for measurement is a sensor that can perform precise distance measurement using the reflection of laser light. It has become a common sensor, as used in iPhones and autonomous robots. This sensor is installed in the classroom and the background difference is calculated from the measured data of the background and the teacher. Extracts a set of points that are to be used as the teacher from the background differences, and records the two-dimensional coordinates of the teacher from these points. The trajectory of the teacher moving through the classroom shows based on the recorded coordinates of the teacher. The results of the experiment showed that there was a large amount of noise, and in some cases the trajectory was outside of the classroom, and in other cases, the coordinates output were very different even though they were at the same position.