Fast and accurate inspection of permanent magnets Magnetic field camera technology For R&D and production

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1 en Fast and accurate inspection of permanent magnets Magnetic field camera technology For R&D and production multipole magnets uniaxial magnets sensor magnets motor magnets permanent magnet rotors

2 about magcam content Magcam is a technology leader, specialized in advanced inspection systems for permanent magnets, based on its unique magnetic field camera technology. Magcam s world-class magnetic field cameras are used for quality control, as well as development of high-end permanent magnets and magnet systems. Magcam s customers include sensor manufacturers, motor/generator constructors, medical and biotech companies, consumer electronics producers, high-end speaker OEM s, research labs, magnet producers and more. advanced magnet inspection. p4 Applications & Benefits. minicube. p6 Magnetic Field Camera. minitable. p7 Working Platform. magscope. p8 Measurement & Analysis Software. magfit. p10 Magnet Analysis Software. software development kit. p12 Automation Software. scanners. p14 Motorized Scan Stages. awards & medals applications. p16 magcam services. p18 references. p18 contact form. p19 imec spin-off patented technology 2 3

3 advanced magnet inspection Complete quantitative characterization of magnets and magnet assemblies. Magcam offers a platform for advanced inspection of permanent magnets based on its unique and patented magnetic field camera technology, featuring a high-density 2D Hall sensor array integrated on a single semiconductor chip. The sensor chip records high resolution magnetic field maps at high speed. These quantitative magnetic field maps contain large amounts of information about the magnet s quality. The maps are analyzed using the versatile magscope software, resulting in a thorough and fast analysis of the magnet. Many quantitative magnet properties are extracted from the measurement data, making the Magcam system ideal for both R&D and production applications. Magcam also offers service measurements, renting services and custom software development services. measured properties multipole magnets uniaxial magnets magnet assemblies magnetic field distribution north/south pole identification field homogeneity local material defects magnetization defects pole length/angle measurement north-south pole asymmetry magnetization angle deviation magnetization vector value magnet position (4 DOF) local deviations from theoretical magnet radial magnetic field distribution magnet misalignment Applications r&d: Development of new sensor and motor magnets Magnet certification Inspection of radial field distribution of assembled permanent magnet rotors production and quality control: Automated inline magnet testing 100% magnet inspection Sorting of magnets Incoming/outgoing magnet inspection Magnet failure diagnosis Benefits r&d production & quality control faster development cycles 100% inline testing and quality control better, more accurate product designs higher production yields fast build-up of advanced magnet expertise tighter tolerances reduced development cost faster magnet failure diagnostics Works for all magnet materials, geometries and magnetization directions: Materials: sintered magnets, plastic bonded magnets Geometries: blocks, cylinders, rings, strips, complex shapes Magnetization directions: axial, diametrical, radial permanent magnet rotors linear motor magnet plates sensor assemblies 4 5

4 minicube magnetic field camera The minicube is a compact magnetic field camera containing a patented sensor chip with an integrated two-dimensional array of more than microscopic Hall magnetic field sensors. Each sensor independently measures the local magnetic field, resulting in a quantitative 2D magnetic field map with high spatial resolution, measured at record speed. This magnetic field map contains a large amount of information about the magnet s properties. dimensions H: 24 mm W: 24 mm D: 24 mm features and benefits: Magnetic field camera technology High magnetic field minitable 2D Hall sensor array with 128 x 128 = sensors on chip Direct digitized field distribution measurements Fast measurements for high throughput (<1 second per image) resolution (0.1 mt) Single measurement for full analysis Compact (24 x 24 x 24 mm³) USB interface No moving parts 2D camera mode and line scan mode The minitable is a working platform in which the minicube magnetic field camera is built-in. The minitable is equipped with an adjustable magnet positioning frame that allows to accurately position magnets with respect to the camera sensor in a reproducible way. The position of the frame can be adjusted in the XY plane in order to position magnets of different sizes. Field of view of 13 x 13 mm² High spatial resolution (0.1 x 0.1 mm²) Hall sensor size: 40 µm 0,1mm Suitable for automation Magcam sensor chip with integrated 2D Hall sensor array features Calibrated magnet positioning frame XY-position of frame corner with respect to sensor origin is continuously adjustable in range from 0 mm to 6 mm (X and Y independently) Size: 85mm x 85mm x 30mm Retractable reference plates on X and Y sides 0,1mm Possibility to mount custom positioning frames Material: anodized aluminum 6 7

5 magscope measurement & analysis software Block magnet Multipole strip magnet The magscope Measurement & Analysis Software makes in-depth analyses of the magnetic field maps recorded with the minicube magnetic field camera and extracts many quantitative magnet properties from the data. It is suited for r&d as well as quality control and production environments. Magnetic field maps of various uniaxial and multipole magnets. Diametrically magnetized ring magnet Axially magnetized disk magnet Measured magnetic field distribution of a 4-pole axially magnetized ring magnet. Circular cross-section of the measured magnetic field distribution with automatic detection and measurement of pole segments. magscope features: Highly flexible and modular measurement and analysis capabilities Realtime measurements and analyses of magnetic field images from minicube magnetic field camera 2D and 3D color scale plots of magnetic field maps 2D and 1D region selection in cartesian and polar coordinates for cut-out and analysis Line plots of cross sections in cartesian or polar coordinates Automatic multipole segment detection Statistical analysis on images and cross sections Accurate distance/radius/angle measurements on image features (e.g. pole segment sizes) Image processing Image stitching Flexible reporting possibilities Automated pass/fail analysis Save/load measurement and analysis configurations for e.g. quality control Save/load recorded images Statistics of measured magnetic field distribution 8 9

6 magfit calculates the angle deviation (θ) of the magnetization vector (M) based on the measured magnetic field distribution. magfit magnet analysis software The magfit Magnet Analysis Software module offers advanced Magcam data analysis capabilities for a complete characterization of uniaxial permanent magnets. By comparing the measured data with theoretical magnet models, magfit extracts a lot of extra information from the data, such as: Full magnetization vector in cartesian and spherical coordinates Angle deviation of magnetization vector from the geometrical magnetization axis (0.1 resolution) Main magnetization axis (with respect to the magnet geometry) Deviations from a perfect theoretical magnet Local defects in the magnet material and in the magnetization Magnet s 3D position (X, Y, Z) and dimensions Magnet s angular position in the sensor plane 3D vector components (Bx, By, Bz) of the magnetic field distribution magfit supports most common magnet geometries, such as: blocks, cylinders, rings Custom geometries are available upon request The magfit Magnet Analysis Software adds substantial value to the Magcam Measurement Platform by extracting additional quantitative magnet properties from the Magcam data, resulting in a complete magnet inspection solution for permanent magnets. Measured magnetization vector with its angular deviation Scanned Magnet Theoretical Magnet Difference 10 11

7 software development kit The Magcam sdk (software development kit) is a C-shared library that can be called from other software environments, thus enabling the integration of the full Magcam functionality into other programs, automate Magcam measurements and analyses and more. the sdk includes following functions: Program and control the minicube magnetic field camera Average multiple frames for data smoothing Transform data (take subsets, rotate, flip) Perform operations on data (abs, invert, offset, sum) Save data to file / Read data from file Stitch images together to obtain a single larger Magcam image (includes automatic overlap finding) Cut out 2D areas in cartesian and polar coordinates for analysis Cut out 1D cross sections in cartesian and polar coordinates for analysis Perform magfit analyses of uniaxial magnets Create processing chains for complex data analysis Automatically find optimal overlap between two images (e.g. reference magnet image and magnet under test image) Plot data Remote operation over TCP/IP applications include: Automation of Magcam measurements Automation of magscope and magfit data analysis Automated magnet inspection (pass/fail) Automated magnet classification Interfacing with external hardware (e.g. motorized scan stage, robot) Large area scanning using an XYZ scanning stage Customized user interfaces for quality control Customized data analysis Integration of Magcam functionality into other computer programs 12 13

8 scanners Magcam offers motorized scan stages with one or more integrated minicube magnetic field cameras for measurements of large magnets and magnet assemblies, as well as for measuring radial magnetic field distributions on permanent magnet rotors and radially/diametrically magnetized magnets. Micrometer-precision dimensions H: 600 mm W: 500 mm D: 300 mm modular concept Measurement speed up to 6cm²/s minicube sensor Image stitching Measurement speed up to 360 /s measurement of permanent magnet rotors measurement of large magnets and assemblies Scan range up to 300mm x 300mm x 300mm (XYZ) Robust design 14 15

9 applications Magcam s inspection systems are suited for R&D as well as production and quality control environments. The magnetic field camera equipment can be used in all applications that involve high quality magnets and magnet assemblies. Products Sensor systems Switches and relays Electric motors Actuators Magnetic couplings Holding magnets Microphones and speakers Beam guiding systems, wigglers and undulators Permanent magnet bearings Measuring instruments Research equipment New magnetic materials Industries Automotive Industrial Medical Consumer electronics Magnet production Research Labs 16 17

10 magcam services Measurement services You can send your samples to MagCam for service measurements. Ideal as a first trial of the MagCam technology. Feasibility studies MagCam offers feasibility studies for custom applications (measuring specific magnetic field). Development projects MagCam can develop a customized system for your application (hardware and software). contact form If you are interested in our products and/or services, please fill out the form below and return it by fax or . We will contact you as soon as possible. An online form is also available on Please send to fax No or info@magcam.com company function / department name street postal code city country phone magcam references interested in Magcam s customers include world leading companies in the fields of sensor systems, electric motors, medical devices, industrial equipment, consumer electronics, automotive engineering, research labs and other industries. As most of our customers consider the Magcam technology a core component of their R&D and/or production equipment and as a source of competitive advantage, Magcam maintains secrecy about their identity

11 magcam nv Research Park Haasrode Romeinse straat 18 b 3001 Leuven, Belgium t f info@magcam.com