In fact, one of the major advantages of eddy current inspection is that probes can be custom designed for a wide variety of applications. Eddy current probes can be designed to match the contours of a part or shaped to fit into a fixture for fast and accurate inspections. General purpose eddy current probe for detection of surface and near surface defects around protruding head fasteners and other structures in aircraft structures030. One conductivity probe 9222340 u8690027, standard 9522103.
Each eddy current probe available from ndts has a unique code. Olympus eddy current probes consist of the acquired brands of nortec and ndt engineering. Eddy current array eca technology allows the electronic driving and reading of several eddy current sensors positioned sidebyside in the same probe assembly. We offer a wide selection of bobbin probes for quick tubing inspections. Sensitive and accurate we also manufacturer ndt probes according to customers requirements. The eddy current bobbin probes are lightweight, economical, but solidly built probes with the coils protected with a plastic sleeve and stainless steel wear guides at front and rear ends. Selfnulling eddy current probe for surface and subsurface. We offer more than 10,000 standard and custom designed eddy. Eddy current probes and application guide olympus ims. The configuration of the probe generally refers to the way the coil or coils are packaged to best couple to the test area of interest.
Investigation of eddy current testing of weld zone by. Olympus extensive line of high performance eddy current scanners is available for use with nortec. Principle ec testing works on the principles of electromagnetic induction. Eddyfi lyft, which completely reinvents pulsed eddy current pec technology. Probe innovations improve inspection efficiencies with combo and high stability xprobes zetecs combination array and bobbin probes help save time and money.
Two detector coils are connected for the differential, thus the probe has very little noise from weld zone. Since 1968, zetec has manufactured over 10,000 different probe designs to meet the constantly changing needs of the nondestructive testing ndt market. For the test, we constructed a special highimpedance cable. Note that the bridge actually measures 6z fz and 6zt iz. Selfnulling eddy current probe for surface and subsurface flaw detection b. Flaw detectors, olympus portable eddy current flaw detector. Nortec eddy current probes are designed and manufactured by olympus ndt in the usa. With the new tx series, eddylab is introducing a fully digital device incorporating usb, can and a highspeed analogue interface. It is mounted through or to the side of a bearing cap and observes the shafts movement relative to its mounting position. Dynamic rotating rigid probe with stainless steel housing for bolt holes testing coils are positioned at right angles to the probe shaft length, differential unshielded shielded details eddy current probes read more. In this technique, a coil also called probe or sensor is excited with sinusoidal alternating current frequency, f, 50 hz5. We offer a wide range of standard eddy current probes and coils for a complete range of eddy current instruments. Straight shaft probe for subsurface flaws detection in the second layer, through the first layer with up to 1. The high performance eddy current bolt hole scanners are available for use with nortec eddy current flaw detectors.
Olympus offers more than 10,000 standard and customdesigned eddy current probes, standard references, and accessories. The ferrite core coils wound for this study are small but typical of the sizes commonly used in commercially manufactured eddy current probes. Eddy current probe catalog introduction 6 every section in this probe catalog begins with a short description of the different eddy current products available. Welcome to the premier industrial source for probes. Eddy current probe sensitivity as a function of coil. The authors improved the uniform eddy current probe in order to detect the flaws at the weld zone.
Supply nondestructive examination nde equipment, instrumentation and accessory components. The eddy current aray applied to the defect detection on. Eddy current rotating scanners eagle wings enterprises. Xprobe and cxb array probes to quickly find and characterize all flaws. We offer more than 10,000 standard and custom designed eddy current probes, standard references, and accessories. Features include speed ranges from 600 to 3000 rpm, frequency ranges from 100 hz to 6 mhz, multiple connector types, and multiple probe types, our scanners offer a. Eddy current is a noncontact method used to inspect nonferromagnetic tubing. Scanning with an eddy current weldscan probe the active part of the probe is 3 3 mm. Eddy current probes are particularly suitable devices for noncontact measurements on metallic targets. Eddy current testing also commonly seen as eddy current testing and ect is one of many electromagnetic testing methods used in nondestructive testing ndt making use of electromagnetic induction to detect and characterize surface and subsurface flaws in conductive materials. The ge mini drive unit is a small, lightweight, rotating eddy current probe drive and is used in conjunction with the probes on page 8. They can be used to find generic subsurface defects. This section features many of the standard design probes that are available in a wide range of diameters, frequencies, and connector styles. Eddy current probes, flexible, array, magnetic sensor.
The eddy probe is used to measure radial or axial shaft motion. In addition to coil size and frequency, the physical shape of a probe contributes to a successful test. Eddy current probes are classified by the configuration and mode of operation of the test coils. Features include speed ranges from 600 to 3000 rpm, frequency ranges from 100 hz to 6 mhz, multiple connector types, and multiple probe types, our scanners offer a full range of application solutions. Molded wheel probe wheel and molded wheel probe probe guide contact information. Eddy current probes ndt and inspection product and. The eddy current sensor and the reference sensor are aligned accurately to each other. The area within 3 probe diameters to the sides and 1,5 diameters behind should be kept clear of any metallic objects other than the object to be measured. In these tests we also used a nortec spo206s coiltype reflection probe. Its size allows inspections to be performed in confined space and.
Flexible shaft surface probes type coil tip angle length drop frequency shaft size connector part id item n. Advances in ndt and materials characterization by eddy currents. A oneyear warranty is applicable for all eddy current probes and reference. Figure 11 thin probe to inspect between two lugs spaced less than. The uniform eddy current probe is much less influenced by variations of the probe liftoff and the electromagnetic characteristics of the test material than the conventional pancake probe. Investigation of eddy current testing of weld zone by uniform.
We can also design probe kits to meet your inspection needs and budget requirements. We are ready to help you find the exact probe you need to get the job done. It has been designed to make the inspection of fastener holes accurate and quick. Steel parts, steel billet, round steel, bar, pipe, weld, cable and other products testing 2. Innovative flexible eddy current probes for the inspection.
The frequency setting determines the frequency of the eddy current probe. Eddy currents are formed when a moving or changing magnetic field intersects a conductor or vice versa. Plus significantly reduce dose and radiation waste. Eddy current technique ect is a powerful method of inspection of metal parts, not only for the detection of small surface notches, but also for the detection of subsurface defects. In this technique, the probe is excited with an alternating current, inducing eddy currents in the part under inspection. Nortec 500 eddy current flaw detectors incorporate a full range of features. All brands are trademarks or registered trademarks of their respective owners and third party entities. Dual element sliding probe absolute reflection this probe is designed to slide over rows of fasteners to detect flaws. The uniform eddy current probe type 1 is applied to inspection of the weld zone inducing the eddy current perpendicular to the weld line as shown in figure 3 a. Some of the common classifications of probes based. Eddy current technology manufactures heat exchanger probes to inspect heat exchanger tubes both ferrous and nonferrous, with probe diameters ranging from 0. They are used for sorting metals and alloys, determining heattreatment condition, and finding damaged areas. The patentpending solution features a stateoftheart portable instrument with realtime cscan imaging, fast data acquisition, as well as gridmapping and dynamic scanning modes. This paper is intended to provide information to help the user in selecting the right e.
Innovative flexible eddy current probes for the inspection of. The site makes it simple and easy to select eddy current probes and accessories used in nondestructive testing ndt. Any discontinuities or material property variations that change the eddy current flow in the part are detected as potential defects by the probe. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. For scanning the material, multiple scans need to be performed, which are zig zag scan of the toe in the heat affected area along the length of the toe, scan of the weld cap and sweep along the toe. Optimal performance in your eddy current test is insured by selecting the right type of probe and one that is meticulously made. They are also fitted with a triax detachable connector but can be fitted with a 2pin microdot or 4 pinfischer connector or other connectors on request. This is the basis of eddy current testing, by monitoring the voltage across the coil in such an arrangement we can detect changes in the material of interest. Ge eddy current probes and accessories eddy current testing is different from other nondestructive testing method in one important respect. For the rcs thruster inspection, important factors concerning the eddy current probe design include the use of one or more coils secondary coils as reference coils, coil orientations three different axial directions with respect to the cavity, coil dimension, and probe frequency 1 50 khz. All specifications are subject to change without notice. The innovative system is composed by a new type of eddy currents probe, electronic devices for signal.
Eddy current, as well as a variety of related products and services. The rectangular planar coils have a maximum testing area of 2. Data acquisition is made possible through the use of multiplexing, which avoids mutual inductance between the individual sensors. Ring bridgedifferential probes have the same characteristics as their spot probe counterparts but are useful for inspections around fasteners. The nortec 600 merges seamlessly into any integrated eddy current detection system. Eddy current testing ect as a technique for testing finds its roots in electromagnetism. An eddy probe system comprises a probe, a driver oscillator demodulator, and an extension cable. If there is a flaw parallel to the weld line, the eddy current in the test. The relative motion causes a circulating flow of electrons, or currents, within the conductor.
Eddy current probes are available in a large variety of shapes and sizes. Probes must be mounted to avoid interaction between the sensing field and the mounting hardware. About the company staveley instruments is a us manufacturing company based in kennewick, washington producing a wide range of innovative ndt equipment and sensors. Optimization criterion the optimization criterion is to maximize the figures of merit s and d, given by auld 1. To view additional table columns, slide right side of table to the left. Rotating plastic scanner probes rotating plastic scanner probes feature a variety of expandable plastictip probes and stainlesssteel. We offer more than 10,000 standard and custom designed eddy current probes, standard refe. A complete line of eddy current probes to choose from. Eddy current sensors uses the principle of eddy current formation to sense displacement. A wide variety of eddy current probes options are available to you, such as auto testing machine. The result is a onsite calibration with an accuracy in the dimension of our laserinterferometric factory calibration. The company manufactures all the top names in ndt such as nortec, sonic, cpx160 xray and of course nortec eddy current probes and harisonic ultrasonic transducers.
This section features many of the standard design probes. Note that cracks must interrupt the surface eddy current flow to be detected. Eddy current probe catalog ndts services provided to order. The result is a on site calibration with an accuracy in the dimension of our laserinterferometric factory calibration. Heat exchanger tube inspection eddy current technology. The authors have developed a uniform eddy current probe 15. Eddycurrent probe design 173 direction orthogonal to the direction of the initial liftoff im pedance change 6zt as shown in figure 2. To ensure that an eddy current of sufficient strength passes through the volume of the component under.
This document and the information contained are olympus ssd property and shall not be. Spot bridge differential spot bridgedifferential probes can be referred to as surface probes, but are a lower frequency than their high frequency counterparts. Olympus also offers custom probe designs to meet specific inspection requirements. Products include ultrasonic and eddy current systems, cscan systems, automotive part testing and aircraft wheel inspection systems. Probes standard and custom criterion ndt produces a wide variety of eddy current probes used for inspection of critical or essential components. Bahr, novel eddy current probe development, sri international report afwaltr814159 to air force wright aeronautical laboratories, wrightpatterson afb. Using stainless steel for strength, a shielded coil was placed at the tip. Low frequency probes eddy current probes techna ndt. Ect began largely as a result of the english scientist michael faradays discovery of electromagnetic induction in 1831. A novel flexible eddycurrent probe with high sensitivity. Lshaped probe for subsurface flaws detection in the second layer, through the first layer with up to 1. During tube inspection, multifrequency eddy currents can locate and size defects under support plates and on the tube sheet.
The solution is designed to scan metals as thick as. This section gives a short description on how to build a probe part number. As mentioned on the previous page, eddy current probes are classified by the configuration and mode of operation of the test coils. Different materials can be exchanged easily in a quick release socket. These are normally fitted with a triax detachable connector but can be fitted. Probes are backward compatible with earlier versions of nortec instruments, such as the ndt19e and ndt. In addition, we can also offer custom id tubing probes, cables and adapters, reference blocks and other various accessories, such as shippingstoragecarrying cases. The companies featured in the following listing offer a comprehensive range of probes. They are ideal for the inspection of heaters, coolers, and heat exchangers. Eddy current sensors with rectangular planar coils were designed, constructed and characterized. We report the results of the first phase of a study designed to quantify the relationship between eddy current coil construction and the performance of these coils used in nondestructive evaluation nde inspections. Olympus conductivity probes with powerlink technology are designed to be used with nortec 600 series instruments. If there is a special probe you are looking for you will find it at ndt solutions, llc.
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