FireWatch Australia

CCTV vs FireWatch BW Optical Sensor

CCTV cameras are the cameras mostly used for surveillance and supervision tasks in many applications. One of their tasks is to transmit the events in colour. This means that the signal needs to be split into the colour components of blue, green and red. These filters, however, lower the light intensity, which results in failing to cover the complete wavelength range which forest fire smoke could adapt. These can be see as the ‘wavelength gaps’ between the individual colour filter.

Therefore CCTV may either miss out certain smoke clouds of it will take them a much longer time to detect smoke. In addition, due to the colour filters, CCTV cameras will find a lack of contrast of the smoke against the green background which forest and bush normally have. This makes the job for a CCTV camera much more difficult, it will take a longer time to detect the fire, if at all.

The following pictures show clearly the different in contrast as a result of a filtered spectrum range and in resolution as a result of purpose-selected CCD for the application ‘smoke detection’. Click the image for an enlarged view.

CCTV vs FireWatch BW Optical Sensor

The detection result with the b/w sensor of the purpose-designed Optical Sensor of the FireWatch system are much better and clearer and so the scanned area much larger. Especially important for nightvision – it gives the FireWatch Optical Sensor a resolution which is 4 times larger than CCTV cameras.

 

FireWatch Detection Performance