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Radar sensor

Radar sensors are microwave sensors that adopt the principle of Doppler radar. The most important requirement for microwave

detection is that the object to be detected is moving. Applications include controlling automatic doors and gates.

The sensor emits microwaves of a defined frequency in order to detect people and large objects moving at speeds between 100

mm/sec. and 5 m/sec. Stationary people or objects are not detected. Based on the latest 24 GHz technology with integrated

microprocessor control, these sensors provide a high level of reliability, even in difficult operating conditions. The 24 GHz

frequency, known as the ‘K-band,’ is reserved by CETECOM for this application area worldwide.

The direction detection function makes it possible to distinguish whether persons are moving towards the door or away from it. It

is necessary to trigger the opening impulse if people are approaching the door. The sensor ignores objects that are moving

away. Cross-traffic suppression serves a similar purpose. Automatic doors are often opened when a pedestrian walks too close

to a shop window or a building facade. The cross-traffic suppression function can avoid this, because microwave technology

combined with the microprocessor evaluation unit accurately detects these directions of motion. Both functions noticeably quiet

the door area, increase the lifetime of the door mechanism, and in doing so help save energy.

• Opening impulse sensors for automatic doors and industrial doors

• Monitoring approach areas to elevators

• Motion sensors for people and objects

• Impulse sensors for escalators

Application