Zhengzhou selling security door support cash on delivery! Instrument】 【Zhengzhou Emi 0371 -55,676,313 Website: www.hm5117.cn AnJianMen principle works produced by the 3.5-4.95M crystal sinusoidal oscillations, the frequency divider is about 7.6K sine wave, the transistor and the coil power amplifier input after door (District 7) large coil of electromagnetic waves emitted by the door 1-6 zone receiving coil, respectively. After reception, the received signal and the reference signal are compared and found that after the change, change grabber output level, CPU 280 milliseconds of six location acquisition card data scanned to determine the metal where the zone bits and output. Second, the structure 1, door structure: a large coil, six small coils, compensating coils and graphite. 2, security doors three chassis structure, probing the workflow CPU detection → a set of infrared is blocked → detected whether the data acquisition card change → Alarm → → Reset detected another group re-infrared detection. Any electronic product radiation has some electromagnetic radiation. Our surroundings there are a lot of electromagnetic radiation. Such as radio, television, mobile phone towers, power lines, computers, televisions, microwave ovens, induction cooker, mobile phone and so on. Relative to these electronic products, security doors of electromagnetic radiation is minimal, because the security door is a weak magnetic field sensor technology, power is very small, compared to power when the phone call many times smaller! Than a computer monitor radiation is also small. Therefore, security door electromagnetic radiation is safe. Buy essentials a high level of security functional requirements of the metal detector gate with a high degree of security demands of needs, including the following-through security gate factors: ⑴, uniform magnetic field uniformity, is 100 percent detection rate of the key; ⑵ , security and reconnaissance force must be sufficient to detect any harm metal objects, regardless of their position and the angle at which approach how; ⑶, security reconnaissance force must be sufficient to detect personnel at any speed under prevailing subjects; ⑷, to have simultaneously detect ferrous and non-ferrous metals capabilities. ⒉ high level of identifiability requires the ability to carry all kinds of metal from a personal matter, to distinguish a small amount of hazardous metal objects (such as small arms). Ability to distinguish based on the following factors: ⑴, uniform magnetic field distribution uniformity; ⑵, various metals analysis capabilities; ⑶, for external motor noise immunity; ⑷, for external mechanical interference immunity; ⒊ excellent The (noise) noise immunity affecting performance metal detector gate plays an important reason. The noise was divided into the following types: ⑴, momentary noise: motors, electric locks, power lines arising out of the total noise; ⑵, intermittent noise: The power supply voltage generated by the RF noise; ⑶, other nearby metal detectors generated noise; ⑷, movement or vibration of the metal mass generated noise. ⒋ rate equipment properly to consider the proper rate of equipment can be obtained from two observations: ⑴, whether electronic board assembly using SMD technology; ⑵, whether the host control panel for functional testing. With high efficiency in addition to the metal detector should have the above characteristics, the use of security, ease of operation, product availability, it is also have varying degrees of requirements. What kind of product is suitable for very high traffic security? Some of today's advanced metal detector gate still function strengths, together with civil airports, for example, national civil aviation unit for metal detectors have developed a new security standards. These standards require that can detect micro-shaped weapons, including magnetic, non-magnetic and mixed alloy. In door type channel, covering 100% of the space does not allow detection of dead ends. As weapons and personal metal items and often confused in humans carry, so do not allow false positives, which is metal security detection technology is a major challenge. And the company has developed a multi-segment display can metal detector gate, is recognized as a better product. Such products reconnaissance capabilities in security and operational functions and can be reached: ⑴, high visibility warning lights, bi-directional display that can detect two-way traffic of arms; ⑵, card-setting system, can be directly selected international security standards and security level; ⑶, for personal items with high discernment; ⑷, durable structure; ⑸, near or remote programmable input; ⑹, meet handicapped ease of use.