First, the security gate electromagnetic radiation?

Any electronic product has a certain electromagnetic radiation. Our surroundings there are a lot of electromagnetic radiation. Such as radio, television, mobile phone towers, power lines, computers, televisions, microwave ovens, cooker, mobile phones and so on.
Relative these electronic products, security doors electromagnetic radiation is minimal, the reason is that the security door is weak magnetic induction technology, power is very small, the power ratio is smaller when the phone call many times!
Radiation is also smaller than the computer monitor.
Therefore, the electromagnetic radiation is safe security gate security gate crystal produced by sinusoidal oscillation principle 3.5-4.95M by the frequency divider is about 7.8K sine wave, the transistor and the coil power amplifier input door (District 7) large emit electromagnetic coil by coil reception area door 1-6 respectively. After the reception, the received signal and the reference signal are compared and found that after the change, change capture card output level, CPU within 300 milliseconds of the six regional acquisition card data is scanned to determine the metal where the location and output display.

Second, the structure

1, door structure: from a large coil, 6 small coil, compensation coil and graphite.
2, chassis structure AnJianMen
3, the detection workflow CPU detection →Whether a group of infrared blocked → detected data acquisition card change→ Alarm →Another group of infrared detection probe → reset again.