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X-rays مطلب ارسالی از koipdd105

X-rays ;are a type of radiation called electromagnetic waves. X-ray imaging creates pictures of the inside of your body. The images show the parts of your body in different shades of black and white. This is because different tissues absorb different amounts of radiation. Calcium in bones absorbs x-rays the most, so bones look white. Fat and other soft tissues absorb less and look gray. Air absorbs the least, so the lungs look black.

The most familiar use of x-rays is checking for fractures (broken bones), but x-rays are also used in other ways. For example, chest x-rays can spot pneumonia. Mammograms use x-rays to look for breast cancer.

When you have an x-ray, you may wear a lead apron to protect certain parts of your body. The amount of radiation you get from an x-ray is small. For example, a chest x-ray gives out a radiation dose similar to the amount of radiation you're naturally exposed to from the environment over 10 days.

Metal detectors

Metal Detecting Machines are based on the science of electromagnetism. ;

Different metal ;detecting machines work in various different ways, but here's the science behind one of the simpler kinds. A metal detector contains a coil of wire (wrapped around the circular head at the end of the handle) known as the transmitter coil. When electricity flows through the coil, a magnetic field is created all around it. As you sweep the detector over the ground, you make the magnetic field move around too. If you move the detector over a metal object, the moving magnetic field affects the atoms inside the metal. In fact, it changes the way the electrons (tiny particles "orbiting" around those atoms) move. Now if we have a changing magnetic field in the metal, the ghost of James Clerk Maxwell tells us we must also have an electric current moving in there too. In other words, the metal detector creates (or "induces") some electrical activity in the metal. But then Maxwell tells us something else interesting too: if we have electricity moving in a piece of metal, it must create some magnetism as well. So, when you move a metal detector over a piece of metal, the magnetic field coming from the detector causes another magnetic field to appear around the metal.

It's this second magnetic field, around the metal, that the detector picks up. The metal detector has a second coil of wire in its head (known as the receiver coil) that's connected to a circuit containing a loudspeaker. As you move the detector about over the piece of metal, the magnetic field produced by the metal cuts through the coil. Now if you move a piece of metal through a magnetic field, you make electricity flow through it (remember, that's how a generator works). So, as you move the detector over the metal, electricity flows through the receiver coil, making the loudspeaker click or beep. Hey presto, the metal detector is triggered and you've found something! The closer you move the transmitter coil to the piece of metal, the stronger the magnetic field the transmitter coil creates in it, the stronger the magnetic field the metal creates in the receiver coil, the more current that flows in the loudspeaker, and the louder the noise.

Metal or needle detection: A must in the apparel and garment industry

Specifically designed zippers meant to go undetected by metal detectors are a must to speed up the processing of finished garments.

In the garment and apparel industry, metal needle detectors are utilized to detect needles that may have been accidentally lodged in finished garments. It is also necessary to ensure that garments and apparel meant to be sold or exported are devoid of all sorts of metal contaminants. Exporting garments embedded with needles or other unwanted metal articles could result in legal actions against the manufacturing company along with bad publicity and heavy financial losses. Thus, garment companies prefer to invest in metal detecting devices that thoroughly scan garments for needle or metal contamination.

Needle detection is also an integral part of the garment manufacturing companies that produce apparel for babies or kids.

Security Inspection Machine

Despite the rapid socio-economic development today, in a peaceful environment, the internal security environment is often affected by terrorists and other insecurity factors, putting us in a dangerous environment. Therefore, in this case, a large investment in a ;security inspection machine ;is very important. Through the use of security inspection devices, security can be better carried out, and the safety of public places can also be improved. ;

What is security equipment?

A security inspection machine is to check the safety of related articles in certain specific places. The equipment can help security personnel to do some safety hazard investigations and related management work. With the social and economic development, more and more security inspection devices. They can be divided into large, medium, and small equipment according to their size and application area. Among them, large-scale security inspection device is mainly used for goods inspection, such as customs, airports, railway containers, vehicle inspection, and so on. At present, medium-sized equipment is mainly used for large-scale activities, and the important safety objectives are the inspection of entrances and exits, personnel, and personal belongings; small equipment is mainly used for temporary security inspection. Tao features handheld devices that are easy to move and carry. From the category of detectable items, the commonly used equipment includes X-ray security inspection machines, metal detection doors, hand-held metal detectors, liquid detectors, automobile chassis video detection systems, etc.

Weighing Detector

The weighing detector is another term for a Load cell or force sensor. Like many sensors, weight sensors are available in many different forms or types. Each type of weight sensor has features that make them well suited to different applications.

Weighing detectors are a device used to measure force and load. They convert weight into an electrical signal which can be processed and used within various applications. To measure force and weight, most weight sensors used internal strain gauges to measure the weight.

Weight Sensor Types

There are various types of weight sensors available. Our selection includes:

Single Point - Single point weight sensors or load cells are the most common type of load cell. This type of weight sensor can measure off-center loads which are useful for various types of scales. They are often used in low-capacity compact weighing systems.

S-Type - S Type weight sensors are shaped like the letter “s” hence the name. They are commonly used in both tension and compression applications offering high endurance and compact designs. S-Type weight sensors are suitable for applications in hoppers and truck scales, tank level scales, mechanical to electrical scales conversions, and level, and inventory monitoring.

Shear Beam and Bending Beam - Bending beam weight sensors often offer low profile construction and making them well suited to applications in restricted areas as well as OEM applications and multiple cell applications. They are very cost-efficient and some models are corrosion resistant and well suited to harsh environments.

Miniature - Miniature weight sensors are small sensors, some as small as 1cm for applications where space can be extremely tight. They are still rugged and reliable and can be used in various industrial weighing applications.

Tension and Compression - Most weight sensors come into the category of Tension and Compression. This is a very broad term to encompass weight sensors. Tension and compression weight sensors are used for all types of applications that involve measuring weight and force. ; ;

How to Use Hand Held Metal Detectors for People Scanning

Metal detectors use electromagnetic fields to actively detect the presence of metallic objects. A handheld metal detector ;wand has two primary components, a transmitter coil that creates the electromagnetic field and a receiver coil that detects electromagnetism. An electromagnetic field is generated around the transmitter coil which extends to around 20cm from the security wand. When the wand is passed over a subject's body if a metal object falls into the generated electromagnetic field a further electromagnetic field is induced around the hidden metal object. This new electromagnetic field is detected by the receiver coil which will trigger an alert for the operator.

High-quality handheld security metal detectors offer various alarm indicators including visual LEDs, selectable audible alarms, and vibration. The best handheld metal detectors are self-calibrating, eliminating the need for regular sensitivity adjustment. They are light-weight, ergonomically designed and a standard 9v battery will provide around 80 hours of continuous operation.

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