Knowledge management given August 21, by Eng. Yader Rostran, Member of the team of electronic security on motion detectors, how they work and which one to choose?
There are basically three types of detectors according to their performance. But there are also different models for every need, whether alarm systems, systems of surveillance, or for the automatic ignition of lamps.
The motion sensor is an electronic device that acts when it detects motion in the area under surveillance. Their utilities are diverse, sometimes used for security and others as automation.
Types of motion detectors
There are basically three types different according to your way of working:
Infrared motion sensors: they are the most widely used are those who produce less failures, detect change in an environment that is monitored through the bodies temperature.
Ultrasonic motion sensor: are you capable of capturing variations in space through an ultrasonic wave that goes through the atmosphere and back to the detector bouncing in every object that is located in the environment, if the device detects a new object will activate it.
Dual technology motion sensor: This type of motion sensors used two different detection technologies, so that it will only give alarm condition if both technologies simultaneously.
Generally, these two technologies are: passive infrared and microwave. Microwave sensors have an antenna that transmits to the environment radiation of waves, a frequency within the microwave spectrum.
