Magnetic sensor array
First Claim
1. A magnetic sensor array for measuring a magnetic field generated by a magnetic source, the magnetic sensor array comprising:
- a planar substrate having an upper surface, the planar substrate including only one set of magnetic sensors, the set of magnetic sensors consisting of;
a first three-dimensional magnetic sensor secured to the upper surface of the substrate at a central location;
a plurality of second three-dimensional magnetic sensors each secured to the upper surface of the substrate at a first distance from the first three-dimensional magnetic sensor; and
a plurality of first one-dimensional magnetic sensors each secured to the upper surface of the substrate at a second distance from the first magnetic sensor that is greater than the first distance, the plurality of first one-dimensional magnetic sensors being configured to measure a Z-component of the three-dimensional magnetic flux density of the magnetic field at a point in space.
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Abstract
A magnetic sensor array includes a first three-dimensional magnetic sensor secured to a substrate in a central location of the substrate. A number of second three-dimensional magnetic sensors are secured to the substrate at a first distance from the first magnetic sensor. Additionally, a number of one-dimensional magnetic sensors are secured to the substrate at a second distance from the first magnetic sensor greater than the first distance. Additional magnetic sensors of any dimension may also be included. The magnetic field sensitivity of the first and second three-dimensional magnetic sensors may be less than the magnetic field sensitivity of the one-dimensional magnetic sensors. The sensing range of the first and second three-dimensional magnetic sensors may be greater than the sensing range of the one-dimensional magnetic sensors. The magnetic sensor array may also include a processing circuit coupled to the magnetic sensors.
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Citations
14 Claims
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1. A magnetic sensor array for measuring a magnetic field generated by a magnetic source, the magnetic sensor array comprising:
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a planar substrate having an upper surface, the planar substrate including only one set of magnetic sensors, the set of magnetic sensors consisting of; a first three-dimensional magnetic sensor secured to the upper surface of the substrate at a central location; a plurality of second three-dimensional magnetic sensors each secured to the upper surface of the substrate at a first distance from the first three-dimensional magnetic sensor; and a plurality of first one-dimensional magnetic sensors each secured to the upper surface of the substrate at a second distance from the first magnetic sensor that is greater than the first distance, the plurality of first one-dimensional magnetic sensors being configured to measure a Z-component of the three-dimensional magnetic flux density of the magnetic field at a point in space. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus for measuring a magnetic field of a magnetic source, the magnetic field being defined by a three-dimensional magnetic flux density at a plurality of points in space, the apparatus comprising:
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a hand-held housing including a handle and a sensing head portion; a planar substrate coupled to the housing and located in the sensing head portion, the planar substrate including only one set of magnetic sensors, the set of magnetic sensors consisting of; a first three-dimensional magnetic sensor coupled to the planar substrate and configured to measure an X-component, a Y-component, and a Z-component of the three dimensional magnetic flux at a point in space; a plurality of second three-dimensional magnetic sensors coupled to the planar substrate a first distance from the first three-dimensional magnetic sensor, each of the plurality of second three-dimensional magnetic sensors being configured to measure the X-component, the Y-component, and the Z-component of the three dimensional magnetic flux at a point in space; a plurality of first one-dimensional magnetic sensors coupled to the planar substrate a second distance from the first three-dimensional magnetic sensor greater than the first distance, each of the plurality of first one-dimensional magnetic sensors being configured to measure the Z-component of the three-dimensional magnetic flux density at a point in space; a plurality of second one-dimensional magnetic sensors coupled to the planar substrate a third distance from the first three-dimensional magnetic sensor greater than the second distance, each of the plurality of second one-dimensional magnetic sensors being configured to measure the Z-component of the three-dimensional magnetic flux density at a point in space; and a plurality of third one-dimensional magnetic sensors coupled to the planar substrate a fourth distance from the first three-dimensional magnetic sensor greater than the third distance, a first number of the plurality of third one-dimensional magnetic sensors being configured to measure the X-component of the three-dimensional magnetic flux density at a point in space and a second number of the plurality of third one-dimensional magnetic sensors being configured to measure the Y-component of the three-dimensional magnetic flux density at a point in space. - View Dependent Claims (11, 12)
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13. A magnetic sensor array for measuring a magnetic field generated by a magnetic source, the magnetic sensor array comprising:
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a planar substrate having an upper surface, a first side surface connected to the upper surface to define a first edge, and a second side surface opposite the first side surface and connected to the upper surface to define a second edge opposite the first edge, the planar substrate including only one set of magnetic sensors, the set of magnetic sensors consisting of; a first three-dimensional magnetic sensor secured to the upper surface of the substrate at a central location; a plurality of second three-dimensional magnetic sensors each secured to the upper surface of the substrate at a first distance from the first three-dimensional magnetic sensor, at least one of the plurality of second three-dimensional magnetic sensors being positioned between the first three-dimensional magnetic sensor and the first edge, and at least one of the plurality of second three-dimensional magnetic sensor being positioned between the first three-dimensional magnetic sensor and the second edge; and a plurality of first one-dimensional magnetic sensors each secured to the upper surface of the substrate at a second distance from the first magnetic sensor, the second distance being greater than the first distance, at least one of the plurality of first one-dimensional magnetic sensors being positioned between the first three-dimensional magnetic sensor and the first edge, and at least one of the plurality of first one-dimensional magnetic sensors being positioned between the first three-dimensional magnetic sensor and the second edge.
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14. A magnetic sensor array for measuring a magnetic field generated by a magnetic source, the magnetic sensor array comprising:
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a planar substrate having an upper surface, the planar substrate including only one set of magnetic sensors, the set of magnetic sensors consisting of; a first three-dimensional magnetic sensor secured to the upper surface of the substrate at a central location; a plurality of second three-dimensional magnetic sensors each secured to the upper surface of the substrate at a first distance from the first three-dimensional magnetic sensor; and a plurality of first one-dimensional magnetic sensors each secured to the upper surface of the substrate at a second distance from the first magnetic sensor that is greater than the first distance, the plurality of first one-dimensional magnetic sensors being configured to measure one of;
(i) an X-component of the three-dimensional magnetic flux density of the magnetic field at a point in space, (ii) a Y-component of the three-dimensional magnetic flux density of the magnetic field at a point in space, or (iii) a Z-component of the three-dimensional magnetic flux density of the magnetic field at a point in space.
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Specification