ABNMTECH Wet Goods Metal Inspection Machine

ABNMTECH Wet Goods Metal Inspection Machine

Food metal detectors generally consist of two parts, namely metal detectors and automatic removal devices, with the detector as the core part. There are three sets of coils distributed inside the detector, namely the central transmitting coil and two equivalent receiving coils. The food metal detector generates a high-frequency variable magnetic field through an oscillator connected to the transmitting coil in the middle. In the idle state, the induced voltages of the two receiving coils cancel each other out before the magnetic field is disturbed, reaching a balanced state. Once metal impurities enter the magnetic field area and the magnetic field is disturbed, this balance is broken, and the induced voltage of the two receiving coils cannot be cancelled out. The un cancelled induced voltage is amplified and processed by the control system, and an alarm signal is generated (metal impurities detected). The food metal detector system can use this alarm signal to drive automatic removal devices, etc., so that the food metal detector can remove metal impurities from the production line.

Generally, products containing salt, sugar, and water have a greater interference with metal detectors. The greater the product interference, the lower the sensitivity of food metal detectors, which is known as product effect.