The circuit designing and material preparing for the first week works

Our project group -- group 17 consists of only 2 members. Our topic concentrates on the infrared sensor unit -- RE200b sensor. It is suitable for indoor detection that researchers can utilize it to build a circuit to detect human’s movement by the perception of infrared ray. A rectangle pulse can be the input voltage and become a reference. When the targeted person’s state of motion changes, the infrared ray generated by the person will influence the original pulse. Then the output pulse can be analyzed to detect the exact performance, such as rest, move, drop or rise. However, the result should only focus on the target.

The sensor will be combined with an IR filter to compose a PIR object. It will receive the waveform and deliver it to an amplifier. Then the comparator will create the result to output.

Most of the components we booked has arrived this week. However, some important ones as inductance were still not received by accidents. Our group can only simulate the circuit by the simulated circuit in the PSPICE software. However, this circuit was not designed perfectly because problems still might be hard to solve in process. We plan to improve the build of it in the 2^nd week.