| 摘要 |
<p>PURPOSE:To obtain an infrared-ray detection device which detects both a moving human body and a radiation temperature by using a single pyroelectric infrared-ray detection element. CONSTITUTION:In the infrared-ray detection device with a pyroelectric infrared- ray detection element 1, a chopper mechanism 2, a chopper drive circuit 21, and an AC amplification circuit 31, a chopper control circuit 22 which controls drive/stop of the chopper mechanism 2 based on a control signal which is input from the outside and an amplification factor control circuit 32 which changes an amplification factor of the AC amplification circuit 31 based on the control signal are provided, thus achieving both functions of a moving human detection device and a radiation temperature detection device and enabling a device to be compact and inexpensive.</p> |
