Born from the metal detector gate to the present, its Technology Innovations, applications, great changes have taken place. "The Gate" and the detection technology combining the enormous effect of the value of reserves, has a deeper prospects. This paper is focused on the metal detector gate Market Status, product technology development profile for the industry reference.
Security metal detector known as the door is a metal cutting through the magnetic field line to make sense of volume change, and then through the CPU Host Processing system to handle this change into the alarm sound and light products.
Metal detector mainly consists of the following components: gate main structure, Probe, Infrared control, main control circuit, display circuit and power supplies. Foreign brands, with Finland METOR (Maiteruike), Italy CEIA (Kia) and the United States, Garrett and so on. Its working principle is to pass the signal acquisition card analog signal, after analog processing of signal amplification, through the A / D conversion, converted by DSP filtering, and finally processed by digital logic circuits.
About the early 80s of last century, metal detector gate appeared in China. All along, the international brands occupy a pioneer metal detector market position. In 1992, Guilin Pan-Asian Electronic Co., Ltd. China independently developed the first security door. Subsequently, the country has emerged more powerful group of manufacturers, such as Xinyuan Tong, Tian Tong so.
Broad market demand Metal detector gate at first limited to airports, important juncture in the field use, and then extended to prisons, courts, government and other important departments, and various gatherings such as sports, galleries and other places. 90 China's rapid economic growth, trade and economic activities have become increasingly developed, the general Enterprise, Places of entertainment have gradually been used increasingly by professional metal detector market spread to the civilian market. In recent years, metal detector gate has also been a growing number of manufacturing enterprises (such as gold and silver jewelry factory, the electronics industry products factory, metal fabrication, Mint, etc.) of all ages to use Security. There are also entrance, driver's license examination room and so on, install the metal detector to prevent candidates to carry cell phones, MP3 / 4 and other tools for cheating. Therefore, Guilin Pan Electronics Co., Ltd. Sell Shi W ei, director of application of the metal detector gate summarized into three areas: security testing, security, anti-cheat. With the metal detector gate
the progressive development of more and more have begun using metal detector gates, as some important research institutes or laboratories, in order to prevent copies of relevant staff important information away U-disk or hard drive; in some special occasions, such as important bidding site, conferences, forums, etc. Those joining in carrying prohibited to prevent recording, camera equipment. Some industry insiders also believe that the metal detector can be applied to banks, Internet cafes and other areas to prevent access to those who carry knives, guns and other goods caused by accidents. But so far, metal detector gates at the bank, the application of the field of small cafes, and only a small amount of application powerhouse bank vaults. With the emphasis on government-related issues, introduction of the State Council issued a similar 2006,2008, "Entertainment Management Ordinance" to regulate the safety management of Internet cafes is not possible, then the door will also broaden the application of metal detectors. Interview also learned that some of the Chinese manufacturers are trying to match foreign brands, hoping to upgrade the technological content of their products to enter the airport area.
Rational face of the chaotic market situationIt is because of the metal detector gate to expand the scope of application, current market conditions there are some new changes, on the one hand, many non-professionals users, their general principles of equipment, use techniques are poorly understood; other On the one hand, some manufacturers to highlight the advantages of their products, product performance information in there on "speculation" phenomenon, which makes the current market seems to be rather confusing and complicated, the urgent need for the application of the guidelines and education markets.
Users lack of knowledge on product marketUser principle structure on the metal detector do not understand the errors caused by product purchase. To location, for example, in general, metal detector in accordance with its height is divided into six zones, from bottom to top were 1,2,3,4,5,6 area. 1 to 6 area location for the sensitivity, the sensitivity of each area the size can be adjusted. Conditioning in the overall sensitivity, but also to achieve the overall sensitivity adjustment, which is called the seventh district. An industry that aims to establish the location of the various metal objects can be distributed, multi-location may also alarm and accurately determine the location of metal objects. Manufacturers advertised their products too much more than location, may mislead the purchase. Another example of digital technology, a professional who says: "All digital metal detecting gate is to be able to analyze the signal characteristics of all metals, for intelligen t, automated processing, and manifested through the product." Metal detector gate current analog circuits do not with intelligent signal processing, digital circuits can only identify a subset of metal properties, the so-called "all-digital metal detector gate," in fact only part of the digital implementation.
In addition, metal detector is also required in the installation expertise, so if the user in the installation and testing products, technical control is not in place, they are also likely to affect the performance of products to play. According to market feedback that the present number of targets can not be detected correctly the situation, the operator may adjust the sensitivity caused by random omission, it may be too strong around the source of interference caused by false positives. Therefore, installation and commissioning process should pay attention: according to the actual needs of applications to set the sensitivity, detection sensitivity is set too easily lead to false positive rate increased, appeared too low and easily omitted; metal detector around 1 to 3 meters should not be large pieces of metal objects or movements exist, the installation location should be away from the wire, communications cable, wireless radio remote controls, power tools and other in terference sources, in order to avoid outside interference; multiple metal detector gates used at the same time, it is best to keep a certain distance and Set different frequencies to avoid mutual interference effect detection accuracy and stability.
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