Many friends asked what the security door can check. The security door is also called the metal detection security door. It is mainly used to check all kinds of metal objects in the carry-on and package. The functions played in different places are different:
First, let's take a look at how the security gate works:
The principle of security gate is sinusoidal oscillation of 3.5-4.95M by crystal oscillator, and the frequency divider is divided into sine wave of about 7.6K. After power amplification by triode and coil, input into the large coil of door panel (7 zone) for electromagnetic wave emission. The coils in zones 1-6 are received separately. After receiving, the received signal is compared with the reference signal. After the change is found, the output level of the acquisition card is changed. The CPU scans the data of the six location acquisition cards within 280 milliseconds to determine the location of the metal and output the display.
Second, the structure 1, the door panel structure: consists of a large coil, 6 small coils, compensation coils and graphite. 2, chassis structure security door
Third, the detection process workflow CPU detection → a group of infrared blocked → detect whether the data of each acquisition card changes → alarm → detect another group of infrared → reset re-detection.
It is easier to understand, that is to say, the security door uses the principle of metal detection, and the detection of various metal objects is realized by the weak magnetic field technology, that is, as long as it is a metal object or a metal object, it can basically be detected. To.
If the passenger passes through the security gate of the railway station, at this time the security gate can detect which prohibited items: such as knife ju, but according to regulations, kitchen knives such as kitchen knives, large scissors, large fruit knives, razors, etc. are prohibited from being carried, but passengers can Check in your baggage. Carving knives, knives, spears, swords, cymbals, etc. for performances, as well as axes, chisels, hammers, cones, weighted or spiked canes, and iron trekking poles are also applicable. If the passenger accidentally carries the above-mentioned items with them in an emergency, they can put them into the box set by the security inspection department, or ask the security personnel to go through the temporary storage procedures.
When the security door is used in the factory, such as the electronics factory, cable factory, electrical appliance factory, etc., or the door of the workshop, there are two main functions. The first is to mainly detect the metal parts of the employee when they are in the factory area. Raw materials, or precious metals, electronic components, wires and cables, important tools, etc.; the second is to detect foreign visitors and other dangerous goods can not enter the factory area, the main detection is the control knife j and other items.
When the security gate is used in bars, KTVs, hotels, etc., it can mainly detect the control knives, the heads, the buds, the steel pipes, the dangerous appliances and other items that are carried at any time, so as to more effectively protect the personal safety of consumers.
When the security gate is used in oil depots or chemical and industrial parks, such as logistics parks, it is mainly used to detect items such as flammable, explosive or electronic items that carry da, lighter, cigarettes, hand ji, electronic products, etc. Factory area.
In short, there are a lot of items that can be inspected by security gates. As long as they are metal objects or metal objects, they can be checked out. They can be used in different places to prevent piracy, riot, and explosion protection, thus protecting public safety and property. Safety, constantly playing the role of security.
Iron Castings -- Cast Iron Automotive Parts
Main products include connecting rod, steering knuckle, brake block, brake drum, brake disc, gearbox parts, chassis structure parts, pressure plate and so on.
Material allowed: common grey iron and ductile iron, high customized chemical Cast Iron (SiMo ductile iron, high chrome casting iron)
The most common used grey iron is HT200 and HT250, ductile iron is QT400 and QT500.
Equipped with advanced manufacturing equipments including 6 automatic molding lines, 22 sets electric furnaces, 120 sets machining equipments, and advanced inspection equipments and so on.
