By far the most flexible 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 in conjunction with short rejection time ensures minimal loss of good product.
Free-fall units are available in single-coil or balanced-coil designs and with either analog or digital electronics. Free-fall units may range in aperture size from 25 to 300 mm (1 to 12 in.). Some types use a quick-clean rejection system that facilitates cleaning from the reject system.
Metal detectors for pneumatically conveyed materials take the type of a collar surrounding the conveying line. Again, these detectors can be purchased in single- or balanced-coil design with analog or digital electronics. Positive speed control is available on some models to precisely time the reject-gate opening and closing so that you can minimize losing good material.
Metal detectors for mechanical conveyors take the shape of a tunnel around the conveyor. This technique can be along with a variety of customized rejection choices for loose or packaged materials. Metal detectors for films and thin sheets use coils that are extremely sensitive at close range. They can fit directly beneath the web and require hardly any space.
Separators for plug-flow applications are similar in operating principle to a free-fall detector. However, the plug-flow design detects metals in slow-moving or standing columns. A normal application is mounting the device underneath the hopper and merely above the throat in the processing machine. At Bunting Magnetics, we refer to this the “Last Chance Separator” or LCS. The LCS is built to aid batch feeders, blenders, and other processing equipment weighing up to 250 lb. Devices are bolted right to the infeed of the LCS.
Give a magnet – Place a drawer, grate, hump, liquid-trap, or some other magnetic separation unit upstream to work with your detector. Magnetic separators will pull all ferrous metal out before it reaches the detector. This will lighten the burden of contaminants that pass through the detector, increasing its efficiency while minimizing the probability of rejecting good material. Furthermore, usage of an upstream magnet enables you to adjust the detector’s sensitivity to a higher level to capture only non-ferrous contaminants.
The detection system consists of a pulse/echo transducer, a water jet nozzle plus an x-y table. Foreign bodies such as glass, Underground Mine Detector were detected by scanning the flat bottom in the beverage container. Based upon acoustic modeling, a way for detection and identification of foreign bodies is developed and tested. A signal processing algorithm for time-frequency analysis is utilized to discriminate between beverage and contaminants from ultrasound echoes. Effective detection ability for materials including 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 case of real foreign body in terms of orthogonality and cross-section to ultrasound beam.
Detection of metallic and non-metallic objects – Sometimes you just need to really know what is hidden behind a surface. As an example behind a wall or cover, or what is inside in a storage container or shipping container. Capacitive proximity sensors are ideal for level and feed monitoring. From solid material, including paper or wood, to granules or liquids, they reliably detect the status from the product during the production process and final inspection. Is there something behind which cover? Will be the filled package really full?
How much paint remains left within the tank? For capacitive proximity sensors, these are easy questions to answer. Capacitive proximity sensors from SICK are never far from the action. Sensing ranges between 1 and 25 mm let them be applied in nearly all installation situations, which makes them extremely adaptable for an array of applications. These sensors pbgavn also remarkably immune 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 wide range of industries, including food, automotive, or even in storage and conveyor systems.
Reliable, powerful, rugged. Inductive proximity sensors from SICK – Millions of inductive proximity sensors are currently used in nearly all industries. They High Quality Under Vehicle Metal Detector without contact, and are seen as a a long service life and extreme ruggedness. With all the latest ASIC technology, SICK’s sensors offer the ultimate in precision and reliability. SICK provides the correct answer to meet your preferences each and 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 route to implementing industry-specific and customized methods 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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