Installation, principle, and classification of metal detector

To adapt to the development of the food packaging industry, FOSHAN HIGH-TECH MACHINERY EQUIPMENT CO., LTD. has researched and produced advanced standard food packaging equipment, such as computer multi-head weighers, material conveyors, vibrating feeders, external conveyors, platforms, Checkweighers, metal detectors, etc., to meet the needs of the food packaging industry. Next, let's take a look at the installation, principle, and classification of metal detectors. Here are some answers.

Here is the content list:

l There are two ways to install the metal detector.

l What is the principle of a metal detector?

l The three functions of a metal detector are divided.

There are two ways to install the metal detector.

Regarding the installation of the metal detector, you also need to know: There are two ways to install the metal detector: you can install a plate-type coil above or below the product conveyed on the conveyor belt, but the more sensitive metal detector should allow the product to pass through the coil and the coil is installed in a metal shell. This more sensitive ‘coil’ type usually contains three coils: a central transmitting coil and two receiving coils with opposite winding directions in a single probe. The oscillator connected to the central coil generates a high-frequency magnetic field, and the two receiving coils with opposite winding directions are connected so that the induced voltages generated by them can be canceled out when the magnetic field is not disturbed.

What is the principle of a metal detector?

The metal detector uses the principle of electromagnetic induction to generate a rapidly changing magnetic field using a coil through which alternating current passes. This magnetic field can induce eddy currents inside metal objects. The eddy current generates a magnetic field, which in turn affects the original magnetic field, causing the detector to beep. The accuracy and reliability of metal detectors depend on the stability of the electromagnetic transmitter frequency, and the operating frequency of 80-800 kHz is generally used. The lower the working frequency of the electromagnetic transmitter, the better the detection performance of iron; the higher the working frequency, the better the detection performance of high carbon steel. Sensitivity control can help control the magnetic field of the detection coil and reduce the impact of electromagnetic interference on it. When encountering interference, reducing the sensitivity of the magnetic field generated by the detection coil can reduce the influence of external electromagnetic interference, thereby making the detection work normally.

The three functions of a metal detector are divided.

The function of the metal detector is divided into an all-metal food metal detector, iron metal food metal detector, and aluminum foil metal food metal detector. The all-metal food metal detector can detect all metals such as iron, stainless steel, copper, aluminum, etc. The detection accuracy and sensitivity are relatively high, and it is stable and reliable. Iron metal food metal detectors can only detect iron metals, commonly known as needle detectors, which have low detection accuracy and sensitivity and are easy to interfere with. The aluminum foil metal food metal detector can only detect ferrous metals, but when detecting products with aluminum foil packaging, its detection accuracy and sensitivity are still high.

Committed to bringing more and better products to customers, this is what we have been doing. If you are interested in a metal detector, you can contact us, we will answer your questions very enthusiastically. Our website is https://www.hightechgz.com/, you are welcome, and we look forward to cooperating with you.