The whole project was done within five
weeks, by Tianqiong Du, Guotao Dong, Hanyi Fei and Yuxiao Fang, and supervised by Dr.Yan. we met
different problems during this period, such as connection problem, design
problem and signal process problems. By brainstorm and dedication, we solved
various problems and finally finish this project satisfying result.
Through correcting the design circuit for
several times, the final system contains one sensor RE200B-P, two operational
amplifiers used to amplify the signal voltage, one operational amplifier used
as analog to digital converter and an Arduino board used to idealize the
signal, a PC used to monitor the motion situation.
The final result is shown in the video
below: when there is no fall motion occurs, the buzzer stay silent, when there
is a fall motion happens, the buzzer beats. and the effective detection range
of this detector is within 1 meter, the video can be found in our week 5 blog.
There are also some limitations of this
infrared fall detector. if it is turned on too long, it goes out of order; and
its detection range is not wide enough. this limitations might be solved in
further research.
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