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Magnetic 3D Mapping Systems

June 13th, 2019 | Mike Guthrie 

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Quadrant has various custom designed testing machines for magnetic measurements. Below are two magnetic mapping systems outlined with descriptions as a combination of our engineering solutions.

Magnetic field mappers measures the field magnitude and direction over a predetermined range of positions. These measurements are made by accurately positioning a collection of three or more Hall Effect sensors and recording their output. A large bank of very many data points allows the evaluation of curls and trends with greater reliability. The resulting data can be manipulated for many purposes; from determining if a computer will demagnetize a hotel room key to determining if a phone mount will reprogram a heart pacemaker. 

When field mappers first became commercially available, Quadrant purchased the Brockhaus 460 Scanner to measure magnetic field amplitude, polarity, and the direction in a 400 mm cube in 0,1 mm steps.

Our newest field mapper is a Senis model MMS-1A-RS. It measures flux density inside a 135 mm cube, in 2 µm steps, with 0.1% accuracy. It can measure in standard X, Y, Z coordinates, or the magnet assembly can be placed on a rotating base to enable r, θ, Z positional coordinates for motor and rotational sensor data. Subprograms enable key data to be output in various ways.

Quadrant engineers utilize field mapping data in many ways. We often evaluate a customer’s current product and use that data as a starting point for product improvement. We sometimes measure a product and compare to calculated values so that we can tune our evaluation methods for better design accuracy.  And we sometimes use it, on complex assemblies, as a final inspection tool to evaluate the finished product.  Field mapper data provides a wealth of information that cannot be obtained by any other equipment.

The magnetic field technique required may vary based on your need or application. If your application requires a dedicated analysis and has not been outlined above, please refer to our engineering team for advice.

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