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Anonymous users2024-02-09Those who collect scrap copper and rotten iron are either tomb robbers.
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Anonymous users2024-02-08Useful. A metal detector is a detector with a wide range of applications. There are three main categories:
Electromagnetic induction type, X-ray detection type, microwave detection type, is an electronic instrument used to detect metals, which can be used in many fields.
In the military, metal detectors can be used to detect metal mines; In the field of security, it can detect the ** and crime tools that are carried or hidden; In terms of archaeology, it can detect ancient tombs where metal objects are buried, and find gold and silver treasures, jewelry or other metal products in ancient tombs;
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Anonymous users2024-02-07Metal detectors can only detect highly conductive substances.
Metal detector is a high-performance, specially designed for security metal detection electronic instruments, mainly divided into electromagnetic induction, X-ray detection, microwave detection three categories.
Due to the special design of the working face of the detection area, the metal detector has the characteristics of large detection area, fast scanning speed and extremely high sensitivity, and is widely used in military, security, archaeology, engineering, mineral exploration and other fields.
Main features: Compared with traditional detectors, the metal detector has a large detection area, fast scanning speed and high sensitivity. The shell is made of ABS engineering plastic at one time, which has the characteristics of strong resistance ability, fine workmanship, light weight and easy to carry.
It can detect all kinds of metal objects hidden on the human body, including jewelry, electrical components, etc. It is suitable for use in airports, customs, docks, banks, buildings, prisons, stadiums, hospitals, schools and other places.
The product uses LSI and can be fully equipped with a 9V rechargeable battery (optional), low voltage indication, LED light sound alarm and vibration alarm, which is an indispensable and ideal product for checking illegal items.
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Anonymous users2024-02-06The probe is as follows:All-metal detector: can detect all metals such as iron, stainless steel, copper, aluminum, etc.
The detection accuracy and sensitivity are relatively high, stable and reliable. There are three main categories: electromagnetic induction type, X-ray detection type, and microwave detection type, which are electronic instruments used to detect metals and can be used in many fields.
Description of features:The accuracy and reliability of a metal detector depends on the stability of the electromagnetic transmitter frequency, which typically operates from 80 to 800 kHz. The lower the operating frequency, the better the detection performance of iron; The higher the working frequency, the better the detection performance of high-carbon steel. The sensitivity of the detector decreases as the detection range increases, and the size of the sensing signal depends on the size of the metal particles and conductivity.
Due to the pulsation of the current and the filtering of the current, the metal detector has certain limits on the delivery speed of the inspected items. If the delivery speed exceeds a reasonable range, the sensitivity of the detector will decrease.
The metal detector uses a ** transmitter coil and two equal receiving coils to generate a high-frequency variable magnetic field through the oscillator connected by the middle transmitter coil, and the induced voltages of the receiving coils on both sides cancel each other out before the magnetic field is disturbed in the idle state to reach an equilibrium state. >>>More
There is less metal detector, the bracelet of AO916 does not ring, it may be this bracelet, his material properties are not metallic. This also shows that the bracelet material may be fake.
Metal detector functions are divided into: 1) Full metal detector: can detect all metals such as iron, stainless steel, copper, aluminum, etc. >>>More
I think there is a certain impact, the electrode brush electrode is difficult to brush clean, and the electrode brush will also remain on the residue of the previous zinc measurement, so, if the aluminum profile is directly transferred, the content of zinc in the aluminum will have a little impact, and the others will be less, some users who use the spectrometer will require the spectrometer manufacturer to match the spark plate, electrode brush, electrode, etc. when using multi-matrix instruments, and use a set for each substrate, and do spark table cleaning and corresponding replacement when replacing the substrate. To ensure that the impact of the process of replacing the measurement material is eliminated as much as possible, of course, this influence can be ignored when making alloys, and it will feel more obvious when doing pure metals.
First, the sample is excited into atomic vapor by spark discharge, and the atoms or ions in the steam are excited to produce emission spectrum, and then the emission spectrum is dispersed into various spectral bands through the optical fiber into the spectrometer spectrometer, and the intensity of the emission spectrum of each element is proportional to the content of the element in the sample according to the emission wavelength range of each element.