High-sensitivity intelligent metal detector

Abstract

The invention provides a high-sensitivity intelligent metal detector including an intelligent display terminal, a casing, a detection channel, a master control module, a transmission driving circuit,a transmitting coil, a receiving coil and a receiving circuit. The master control module is connected to the transmission driving circuit and the receiving circuit. The transmission driving circuit isconnected to the transmitting coil. The receiving coil is connected to the receiving circuit. The casing is a large through-hole tubular member with a multi-layered pipe wall, and a large through hole in the tubular member is a detection channel. The multilayer structure of the casing includes an outer protection plate, a buffer layer, a shielding layer and a coil layer from the outside to the inside. The transmitting coil and the receiving coil are arranged at a coil layer. A shielding layer comprises an electric field shielding film and / or a magnetic field shielding film. The detector has amulti-layer shielding structure, high sensitivity can be maintained in vibration and interference environments, the outer protection plate can be formed with metal or plastic, the detector has cost flexibility and has a graphic interface and Internet-based communication ability, and it is easy to manage and introduce machine learning mechanisms.

Description

Technical field [0001] The invention relates to the field of material detection, in particular to a highly sensitive intelligent metal detector. Background technique [0002] Metal detection probes are commonly used equipment in factories to detect finished products. They are widely used in the detection of daily necessities such as food, hygiene, and textiles. They require high sensitivity and can detect small metals to ensure user safety. However, the existing probe structure generally has the following problems: 1. Poor anti-electromagnetic interference ability. A layer of 304 stainless steel shell is usually used for shielding. Since 304 is not a highly magnetically permeable material, it is mainly used to shield electric field interference and shield magnetic fields, especially low-frequency magnetic fields. Weak ability; 2. Low sensitivity, because the ability to resist electromagnetic interference is limited, so the sensitivity is relatively low (dare not raise the se...

AI Technical Summary

Problems solved by technology

However, the existing probe structure generally has the following problems: 1. The ability to resist electromagnetic interference is poor, and a layer of 304 stainless steel shell is usually used for shielding. Because 304 is not a high magnetic permeability material, it is mainly used to shield electric field interference, especially for low-frequency magnetic fields. Weak ability; 2. Low sensitivity, because the ability to resist electromagnetic interference is limited, so the sensitivity is relatively low (dare not to increase the sensitivity); 3, The ability to resist mechanical vibration is poor, because the metal shell is heavy and bulky, when it is used as a mechanical assembly line When the vibration is transmitted to the shell, there will be a slight relative movement between the shell and the receiving coil, which is prone to false alarms

4. The process is unreasonable. The existing process usually places the transmitting coil and the receiving coil in the groove of the plastic plate whose width is larger than the wire diameter, and pours epoxy resin into the package. Due to the different expansion coefficients of metal, epoxy resin and plastic, after Transportation vibration, thermal expansion and cold contraction, after a long time, there will be a slight separation between the metal coil and the epoxy resin, and between the epoxy resin and the bakelite board, so there will be gaps and deformation between the coil and the plastic guard, making the double receiving coil The balance of the factory is damaged, and the coil is easily affected by vibration and slightly shakes, which is easy to false alarm

5. Without Internet-based networking capabilities, it is difficult to count the data of metal detectors in real time, and it is difficult to share, count and learn from each other in real time for product data distributed in various places and workshops

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