The working principle of food metal detectors generally has two kinds, the principle of magnetic induction, and the principle of electromagnetic induction.
The gold detector with magnetic induction principle uses a high-strength permanent magnet. The permanent magnet generates a magnetic field, and the receiving coil detects the magnetic field change. When the ferromagnetic metal passes, the ferromagnetic metal disturbs the change of the magnetic field, and the receiving coil generates a The weak voltage signal is processed by the back-end circuit to achieve the purpose of detection. The principle of magnetic gas induction can only detect magnetic conductive metals: such as iron, can not detect stainless steel 304, copper, aluminum, lead, tin and other metals.
The gold detector of the electromagnetic induction principle adopts a balanced coil, and generates alternating high-frequency electromagnetic fields through the transmitting coil. The receiving coils distributed on both sides of the transmitting coil are balanced coils, and are connected in reverse phase. When no metal signal passes, the coil is received. The voltage is zero. When the magnetic metal and the non-magnetic metal pass through the two receiving coils, a change in the signal is generated, and it is possible to judge whether or not the metal foreign matter is contained according to the change of the voltage signal.
At present, stainless steel 304 (even 316), copper, aluminum and other non-magnetic metals are commonly used in food factories. Therefore, food metal detectors with balanced coils are widely used, and ferromagnetic food metal detectors can cause non-magnetic Metal foreign body pollution.
The above briefly introduces the principle of the metal detector. As a high-performance metal detector, it needs to adopt more advanced electronic technology and software algorithms. This is the gap between the domestic gold inspection machine and the imported brand gold inspection machine. Based on a strong R&D team, Zhishen has tested the Pulso series of high-end metal detectors. From the electronic technology and software algorithms, it has broken through the technical barriers of high-end food metal detectors. It has been successfully applied in many domestic well-known brand manufacturers and has become the domestic first ling. Metal detection brand.
The gold detector with magnetic induction principle uses a high-strength permanent magnet. The permanent magnet generates a magnetic field, and the receiving coil detects the magnetic field change. When the ferromagnetic metal passes, the ferromagnetic metal disturbs the change of the magnetic field, and the receiving coil generates a The weak voltage signal is processed by the back-end circuit to achieve the purpose of detection. The principle of magnetic gas induction can only detect magnetic conductive metals: such as iron, can not detect stainless steel 304, copper, aluminum, lead, tin and other metals.
The gold detector of the electromagnetic induction principle adopts a balanced coil, and generates alternating high-frequency electromagnetic fields through the transmitting coil. The receiving coils distributed on both sides of the transmitting coil are balanced coils, and are connected in reverse phase. When no metal signal passes, the coil is received. The voltage is zero. When the magnetic metal and the non-magnetic metal pass through the two receiving coils, a change in the signal is generated, and it is possible to judge whether or not the metal foreign matter is contained according to the change of the voltage signal.
At present, stainless steel 304 (even 316), copper, aluminum and other non-magnetic metals are commonly used in food factories. Therefore, food metal detectors with balanced coils are widely used, and ferromagnetic food metal detectors can cause non-magnetic Metal foreign body pollution.
The above briefly introduces the principle of the metal detector. As a high-performance metal detector, it needs to adopt more advanced electronic technology and software algorithms. This is the gap between the domestic gold inspection machine and the imported brand gold inspection machine. Based on a strong R&D team, Zhishen has tested the Pulso series of high-end metal detectors. From the electronic technology and software algorithms, it has broken through the technical barriers of high-end food metal detectors. It has been successfully applied in many domestic well-known brand manufacturers and has become the domestic first ling. Metal detection brand.
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