Probably the most versatile type is the Airport X-Ray Machine, where the material is gravity fed through the inlet of the detector. Metallic particles are detected and immediately rejected by an air-operated rejection system. Adjustable sensitivity along with short rejection time ensures minimal loss of good product.
Free-fall units can be purchased in single-coil or balanced-coil designs and with either analog or digital electronics. Free-fall units can vary in aperture size from 25 to 300 mm (1 to 12 in.). Some types use a quick-clean rejection system that facilitates cleaning in the reject system.
Metal detectors for pneumatically conveyed materials take the form of a collar surrounding the conveying line. Again, these detectors are available in single- or balanced-coil design with analog or digital electronics. Positive speed control can be obtained on some models to precisely time the reject-gate opening and closing to be able to minimize the losing of good material.
Metal detectors for mechanical conveyors take the shape of a tunnel all around the conveyor. This technique could be combined with a variety of customized rejection alternatives for loose or packaged materials. Metal detectors for films and thin sheets use coils which are extremely sensitive at close range. They can fit directly under the web and require very little space.
Separators for plug-flow applications are similar in operating principle to some free-fall detector. However, the plug-flow design detects metals in slow-moving or standing columns. An average application is mounting the system underneath the hopper and merely higher than the throat from the processing machine. At Bunting Magnetics, we call this the “Last Chance Separator” or LCS. The LCS is constructed to back up batch feeders, blenders, along with other processing equipment weighing as much as 250 lb. Devices are bolted directly to the infeed in the LCS.
Give a magnet – Place a drawer, grate, hump, liquid-trap, or any other magnetic separation unit upstream to do business with your detector. Magnetic separators will pull all ferrous metal out before it reaches the detector. This will lighten the burden of contaminants that move through the detector, increasing its efficiency while minimizing the chances of rejecting good material. Furthermore, use of an upstream magnet allows you to adjust the detector’s sensitivity to your higher level to trap only non-ferrous contaminants.
The detection system consists of a pulse/echo transducer, a water jet nozzle and an x-y table. Foreign bodies including glass, Railway Hand Held Metal Detector were detected by scanning the flat bottom of the beverage container. According to acoustic modeling, a way for detection and identification of foreign bodies is developed and tested. A transmission processing algorithm for time-frequency analysis is utilized to discriminate between beverage and contaminants from ultrasound echoes. Effective detection ability for materials like glass, metals, and plastic, with sizes from 10 to 2.5 mm2 is demonstrated. Experiments were also performed using ultrasonic beam penetrating glass material to detect steel balls of different sizes. This can be closer to the situation of real foreign body when it comes to orthogonality and cross-section to ultrasound beam.
Detection of metallic and non-metallic objects – Sometimes you need to simply really know what is hidden behind a surface. For instance behind a wall or cover, or what is inside in a storage container or shipping container. Capacitive proximity sensors are perfect for level and feed monitoring. From solid material, such as paper or wood, to granules or liquids, they reliably detect the status of the product throughout the production process and final inspection. Will there be something behind that cover? Is definitely the filled package really full?
Just how much paint is still left inside the tank? For capacitive proximity sensors, they are easy questions to answer. Capacitive proximity sensors from SICK are never far away from the action. Sensing ranges between 1 and 25 mm allow them to be utilized in virtually all installation situations, making them extremely adaptable for a wide range of applications. These sensors pbgavn also remarkably resistant to faults. Impurities, contamination, dust, and airborne spray particles have little influence on them, nor does electromagnetic interference. Not surprising these are installed in a great deal of industries, like food, automotive, or even in storage and conveyor systems.
Reliable, powerful, rugged. Inductive proximity sensors from SICK – Countless inductive proximity sensors are currently in use in practically all industries. They Underground Mineral Detector without contact, and they are described as an extended service life and extreme ruggedness. With all the latest ASIC technology, SICK’s sensors provide you with the epitome of precision and reliability. SICK can offer the correct solution to meet your requirements every time – from cylindrical or rectangular standard sensors with single, double or triple operating distance, to special sensors for explosive zones and harsh environments. Our sensors are definitely the intelligent, reliable path to implementing industry-specific and customized answers to any task involving automation.
Junhong Electronic&Technology (Dongguan) Co., Ltd is a professional manufacturer since 2005, specialized in R&D of security detection technology. We have various of products range: Walk through metal detectors, hand held metal detectors, X-ray luggage scanners, X-Ray Body Scanner, Underground Metal Detector, Industrial Metal Detector, Checkweigher, Infrared Body Temperature Detection System; Explosives Detector, Under Vehicle Surveillance Systems; etc.
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