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2018 metal detectors explained

by:Kenwei      2019-08-22
Metal detectors are devices specially designed to detect metals located deep in water or underground.
When it was invented, it was specially designed for screening or safety functions and locating mines.
There are quite a few industries using steel detectors similar to the food processing, textiles, prescription drugs, compounds, packaging and plastic industries.
In order to avoid food poisoning, it is very important to verify the meal of steel fragments.
These metal particles will be damaged on machines in the food processing industry.
You will then most likely find a lot of people using steel detectors when trying to find treasures that may be electronically driven and previous coins.
So, you might want to know how this thing works to detect the metal that can be hidden or how the Manual metal detector worksheld work.
So, let\'s take a better look at these detectors and understand how they work.
Usually, the working principle of the metal detector is that when the current passes through the loop, it generates a magnetic field.
One of the basic elements of the detector is the oscillator;
It generates AC power.
When an AC current or current passes through a transmission coil in a metal detector, a magnetic zone is generated.
So, when a metal object or conductor appears near a coil, it generates a current inside the object and another magnetic area on the object.
There may be another coil in the loop that can exist in a detector called a receiver coil, and because of the presence of a metal or metal object, the receiver coil can detect the magnetic body adjustment.
The latest metal detectors use these Applied Sciences;
Very low frequency PI pulse sensing and BFO shooting-
Frequency oscillator.
Let\'s focus on these applied sciences: The most typical expertise in metal detectors is VLF.
There are coils in two units, that is, receiver and transmitter coils.
The coil distributes the local current and generates a magnetic field, which always pushes down to the bottom and pulls back, called the transmitter coil.
The steel detector reacts in any metal or conductor passing through it, resulting in a magnetic zone.
When it encounters an object, current and magnetic objects are formed on the conductor.
In the countdown, the receiver coil is protected from the magnetic discipline generated by the transmitter coil and is only affected by the magnetic field of the conductor and/or metal object.
The electricity running on this receiver coil produces a magnetic body that is weak when the conductor is close to the metal detector.
In turn, the coil will amplify and send the frequency of electricity at the same frequency as the magnetic field from the steel for evaluation within the control box.
In this way, the metal detector that works on the VLF (
Very low frequency)
Will be able to determine the difference between multiple metals, the depth of the position at the time of detection.
A single coil is used in PI technology (Pulse sensing)
This is possible on each transmitter and receiver.
Nevertheless, it is also possible to use 2 to 3 coils.
Metal detectors working in this technology can emit short burst and/or pulse currents in the online circle, resulting in a shorter magnetic field.
In each pulse, the resulting magnetic field reverses the polarity and eventually crashes.
Electrical spikes can be generated and will last for a very short period of time.
When the magnetic zone, pulse, and Spike crash, a known presence called a mirror pulse will appear and enter the coil to run.
This reflected pulse can only last for a few seconds.
When a metal or conductor is in contact with a steel detector, the reflection pulse can end in an extended interval.
The explanation for this is attributed to the relative magnetic field generated by the metal detector.
The metal detector is a device with an integrator that includes a pattern circuit that can be carefully monitored on each spike.
Factors that convert, read, and amplify symbols will directly convert the signal to DC.
When the correct amount of electricity is obtained, the linked audio circuit will produce tones that indicate the presence of a metal object.
The frequency oscillator is like VLF (
Very low frequency)
Use two wire coils.
The first coil of the system may be found in the management field, placing the second coil in the search head.
Compared to the second coil in the search head, the first one that can be found in the management box is usually smaller.
2 coils or, remain connected within the oscillator, which sends a variety of pulses per second.
When the heartbeat passes through the radio waves of each coil, it can be created, and the receiver that can be found in the control field collects all the signals.
After that, you will hear clear tones, such as the radio frequency generated by the receiver.
The presence of electrical energy transmitted in the coil in the search head will produce a magnet body, creating a brand new magnet area around the metal object, as the metal detector passes through the metal.
The radio waves generated from the search head coil are disturbed by the magnetic field generated by metal objects.
This produces a change in tone in the receiver. This change helps to detect target items.
Through this technology, we will see a variety of different metal detectors in our daily life.
These metal detectors can distinguish the difference between objects and know where they are, not just to detect metal targets or objects by conducting electricity.
We hope this metal detector article will answer your wide range of questions about how these machines and institutions work.
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