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The microwave motion sensor is a microwave moving object detector designed using the principle of Doppler radar. Unlike ordinary infrared detectors, microwave sensors detect the movement of objects by detecting microwaves reflected by the objects. The detection objects will not be limited to the human body, and there are many other things. The microwave sensor is not affected by the ambient temperature, has a long detection distance, and has high sensitivity. It is widely used in industrial, transportation, and civil devices, such as vehicle speed measurement, automatic doors, sensor lights, and reversing radar.
Due to the universality of microwave sensor detection objects, in actual life applications, another sensor will be used for targeted detection. For example, the microwave sensor + infrared pyroelectric sensor can effectively judge whether someone passes by, will not be interfered by sunlight, clothing color, and will not react to other objects.
Compared with other detection methods, this detection method has the following advantages:
Not affected by temperature, humidity, noise, airflow, dust, light, etc., suitable for harsh environments;
Strong resistance to radio frequency interference;
Low output power, no harm to the human body;
Long detection distance;
Support the detection of non-living objects
7. The direction of the microwave is very good, the speed is equal to the speed of light;
Working voltage: 5V ± 0.25V
Working current (CW): 60mA max., 37mA typical
Detection distance: 2-16m continuously adjustable (minimum range 2m, maximum range 16m)
Transmission frequency: 10.525 GHz
Frequency setting accuracy: 3MHz
Output power (minimum): 13dBm EIRP
Harmonic emission: <-10dBm
Average current (5% DC): 2mA typ.
Pulse width (Min.): 5uSec
Duty cycle (Min.): 1%
Sensitivity (10dB S / N ratio) 3Hz to 80Hz Bandwidth: -86dBm
3Hz to 80Hz bandwidth clutter 10uV
Antenna gain: 8dBi
Vertical 3dB beam width: 36 degrees
Horizontal level 3dB beam width: 72 degrees
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