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this is shockburst HB100 Microwave Sensor 10.525GHz Doppler Radar Motion Detector Arduino
HB100 microwave modules is the use of Doppler radar (Doppler Radar) design principles of the microwave moving object detector is mainly used in automatic door control switch , security systems , ATM cash dispenser automatic recording control system, automatic train signals , etc. places. HB100 is the standard 10.525GHz microwave Doppler radar detector , this detection method compared with other detection method has the following advantages :
1, the non- contact detection ;
2 , independent of temperature , humidity , noise, air , dust , light and so on , suitable for harsh environments ;
3, anti- RF interference ability ;
4, the output power is small , constitute a hazard to humans ;
5 , long-distance : detection range of more than 20 meters.
Using 10.525GHz microwave and a lower frequency wave has the following advantages : 1, the microwave antenna , have a good orientation , so it is easy to control the microwave probe 's scope . 2, the microwave is attenuated during transmission easier , absorption and reflection , walls and other obstructions encountered will be blocked , so the outer walls and other obstructions of the object to its minimal interference .
Power : Give HB100 DC power supply with continuous (CW) mode and pulse power (PW) mode two kinds : HB100 adapt voltage range of 5V ± 5%. In continuous DC power supply (CW) mode operation typical current 35mA ( typ ) . At low duty cycle pulse power (PW) mode , it is recommended to HB100 provides 5V, pulse width 5μs ~ 30μs between ( typically 20μs), frequency of 2 ~ 4kHz ( typically 2.0kHz) of pulse power supply. 3 to 10% of the average duty cycle of the pulse current supply 1.2mA ~ 4mA.
Pulse power supply voltage must be between 4.75V ~ 5.25V , pulse top flatness affects HB100 detection capabilities . When the supply voltage exceeds 5.25V , its reliability is reduced, and may result in the nominal frequency of the RF output and the outside of the circuit permanently damaged.
RF output : In all recommended operating modes , HB100 RF power output is very low , both in the human body do not constitute any safety hazards within the work . In continuous DC power supply (CW) mode operation , the total output power is less than 15mW. Output power density 5mm office 1mW/cm2, 1m office 0.72μW/cm2. When a 5% duty cycle pulse power mode, the power density is reduced to 50μW/cm2 and 0.036μW/cm2.
IF output: When an object in the effective detection range HB100 to 1m / s relative to the speed of the antenna surface HB100 ( non- aluminum side of the shield for the antenna surface ) to make radial movement , HB100 the IF output is 72Hz / s, IF output frequency of the pulsating movement of the object relative to the radial velocity is approximately linear relationship . IF output amplitude and the object size, distance , and when a person weighing 70kg, 170cm tall testers imposed at a distance HB100 1m 1m / s velocity radial movement relative to HB100 do when , IF output is 5mV, 72Hz / s pulse signal , IF output amplitude approximate the inverse square of the distance between .
Note: 1. Detection range depends on the target size and reflectivity and signal to noise ratio .
2.10.525GHz the Doppler velocity 31Hz/m.p.h
3 modules must be installed so that the antenna surface ( non- aluminum shield that side of the antenna surface ) toward the detection area , the user can adjust the direction , in order to achieve the best coverage area.
Smple fault diagnosis : HB100 IF output of the welding , it is easy to be breakdown, measured with a multimeter diode file IF GND and GND on the IF voltage drop is normal (VIF-GNDVGND-IF) , respectively, were around 0.25V .
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