6 - Application of sensors

The invader detector consist of Fresnel-lens system with 180 degree visual angle and pirocapacitors. The PVDF (poly(vinylide-fluoride)) pirocapacitors are sensitive to infrared radiation. It uses twin-capacitors to compensate the enviromental noise. The alternate radiation generates the pirovoltage in PVDF which could be charge amplified. In case of slow changes the charge neutralization causes no signal on output.