A dual-band flame detector based on video

High quality medium band-pass infrared filters are often adopted in optical systems to improve signal-to-noise ratio. In order to extract the flame feature more easy, a band-pass film is designed and fabricated with using germanium (Ge) and silicon oxide (SiO) as the higher and the lower refractive index materials, respectively. The selection of materials and the design principles of the mid-infrared band-pass filter were introduced in detail, the film structure is also given. Then a dual-band flame detector was developed based on video. The TI DaVinci technology was used to process fire video and then regional connectivity sign algorithm was employed to detect the edge contour for obtaining the parameters of the flame circle. Realization of four modules for the proposed flame detector is introduced. All the hardware was designed, and the circuit board of the flame detector was divided into two part boards. Furthermore, it realized the software for the flame detector. Finally, an experiment was done to test the detector. The results show that the developed detector can find the fire quickly.