At this detection equipment, following device is done to make detect only the move of the person or the animal as much as possible.
I will introduce the equipment which detects the move of the human being or the animal using the pyroelectric infrared sensor on these pages.
The body of the human being or the animal is emitting the infrared rays. This circuit is the circuit to detect the change of the infrared rays by the infrared sensor and to work the relay. Because the Fresnel lens is put to the infrared sensor, the move of the person in the very narrow range can be detected.
The important part is the pyroelectric infrared sensor. I used the pyroelectric infrared sensor(RE814S) which is made by the NIPPON CERAMIC company.
|It uses the dual element type as the infrared sensor and it makes to detect the change of the infrared rays in the background little.
|It makes the object place to detect using the Fresnel lens narrow.
|It is using the band pass filter for the amplifier and it makes to detect the change which was slowly or the too quick change little.
|It uses the window comparator and the movement where little change occurs makes not detect.