Abstract:
The article introduces a kind of passive infrared induction faucet, that is infrared radiation generated by the human body as a signal source, chooses the infrared photon detector doping germanium to detect, which can efficient response to the peak wavelength of radiation human body, and response rapidly, free from interference environmental temperature. On the basis of detailed analysis of the human body radiation characteristics and selecting the appropriate infrared detector, the design of passive infrared induction automatic faucet was built, with the corresponding signal processing circuit, using indicator light instead of faucet, validated the correctness of design scheme.