Today's market security equipment primarily operates on the principle of high-frequency X-ray penetration, with metal detection primarily based on electromagnetic resonance. In addition, principles such as terahertz, infrared, and millimeter waves are also used as detection methods.

Metal detectors are categorized based on their functions and application fields, including the following types: walk-through metal detectors (also known as: metal detection gates; abbreviated as: security gates), handheld metal detectors, portable metal detectors, desktop metal detectors, industrial metal detectors, and underwater metal detectors. Metal detectors generally operate based on an inductive principle.

The principle of the system is the LC oscillating type metal detector, which is active. It determines the presence or absence of the tested metal by detecting the secondary magnetic field generated by the induced metal current. The signal of the LC oscillating type metal detector is a frequency signal. When metal is detected, there is a certain change in the frequency of the output signal. By capturing this frequency change, it is possible to determine whether there is a metal object at that time. This type of metal detector is widely used and convenient for design and improvement.

The role of the walk-through metal detector in this process is crucial and essential. Currently, in our country's field, a significant portion of the security checkpoint products are imported from abroad. Although domestic products have learned from foreign experience and technology, there still exists a certain level of technical gap, particularly with frequent occurrences of false alarms and missed detections. Missed detections, from a technical perspective, should be said to not yet reach the perfect standard of sensitivity. False alarms primarily refer to the poor anti-interference performance of metal detection security gates.

Next up, let's talk about the metal detection portal, a security screening device.

Detection Area:

Divided into 12 overlapping mesh detection areas based on the fundamental human structure. Interactive transmission and reception accurately determine the location of metal objects. Eliminates weak and blind spots within detection areas, offering higher sensitivity and more stable performance. Dual-sided infrared scanning rapidly captures induction signals, preventing detection errors caused by induction lag when humans pass through, and automatically counts the number of people passing. The 12 main detection areas have a 1000-level sensitivity setting, allowing for pre-set possible locations, sizes, weights, and volumes of metal objects for appropriate sensitivity adjustments based on actual usage conditions.

Method:

The sound and light alarm system offers a variety of options for easy identification. The sound and light alarm allows for precise detection of metal item locations through ultra-bright LED lights on the panel area; LED column lights are installed on all four sides of the door, with each row consisting of 240 bulbs, making it直观 to see the alarm zone and assist check personnel in quickly locating the position. Alarm Indication: 1-25S alarm time, the alarm location on all four sides of the column can be directly displayed through LED column lights, accurately indicating the corresponding height of human concealment.

Regional Sensitivity

Our sensors can detect metal objects as small as a paperclip, allowing you to adjust the sensitivity of individual zones to the desired level while also fine-tuning overall sensitivity. Pre-set parameters for the weight, volume, size, and location of metal items, as well as excluding false alarms from items like keys, jewelry, zippers, buttons, coins, and mobile phones, enable the detection of regulated and prohibited items.