The following is an introduction to the application of ferromagnetic detection technology in the field of mobile phone and other ferromagnetic prohibited item detection, as well as typical usage locations:

I. Core Products and Technical Principles

Mobile dedicated detection door 

Principle: Based on eddy current detection and electromagnetic induction, combined with weak signal processing technology to identify the electromagnetic characteristics of electronic devices, it can distinguish between mobile phones (including shutdown, battery removal status) and other daily metal items (coins, keys, etc.)

Function: Accurately detect digital devices such as mobile phones, cameras, laptops, etc., with low false alarm rate.

Ferromagnetic Detection Systems (FMDS)

Composition:

High sensitivity wall mounted screening device (optical alarm)

Low sensitivity channel detector (sound and light alarm)

Principle: Trigger an alarm by detecting magnetic field distortion caused by ferromagnetic substances, suitable for strong magnetic field sensitive environments 

Passive millimeter wave imaging system

Principle: Using terahertz electromagnetic waves to penetrate clothing and detect hidden ferromagnetic weapons (such as knives, firearms) and non-metallic explosives

Features: No need for ionizing radiation, suitable for human security checks.

Giant Magnetoimpedance (GMI) Sensor

Application: Scanning magnetic microscope system with a resolution of 400 μ m and a magnetic field detection accuracy of 10nOe, used for precise detection of micro ferromagnetic residues

II. Typical application locations

Venue type applicable product functional requirements

The FMDS system of medical institutions prevents ferromagnetic objects (such as mobile phones and tools) from entering the MRI room, avoiding equipment interference and safety accidents

Mobile phone detection door+passive millimeter wave imaging screening for prohibited items such as mobile phones and weapons in the security checkpoint, supporting high traffic flow

GMI sensor network perimeter protection and structural health monitoring for critical facilities, identifying ferromagnetic intrusions (such as eavesdropping devices)

Industrial production line high-precision ferromagnetic detectors detect ferromagnetic pollutants in products and comply with HACCP/BRC certification

III. Comparison of Technical Advantages

Product type detection accuracy, anti-interference ability, applicable scenario limitations

Mobile phone detection door with a recognition rate of over 99%. Fixed installation is required to resist daily metal interference

FMDS system detects micro ferromagnetic substances to resist non ferromagnetic interference and avoid strong magnetic field environments

Passive millimeter wave imaging for concealed object visualization, resistant to fabric obstruction, less affected by weather conditions

Note: When deploying FMDS in hospitals, it is necessary to ensure a "iron free environment" (such as using non-ferrous wheelchairs) to reduce false alarms

Industrial testing requires selecting equipment that matches the penetration force based on the production line speed (such as 32mm steel plate penetration force)