Magnetic field sensor device
View Patent ↗In a magnetic sensor device, a positioning element is provided with receptacles for receiving one magnetic field sensor element each. The positioning element and the magnetic field sensor elements are manufactured in a way that they fit exactly together so that the positioning element exactly positions the sensor elements with respect to each other. The magnetic field sensor elements may be manufactured separately before they are put together to build the magnetic field sensor device.
1. Magnetic field sensor device comprising
three magnetic field sensor elements each having a sensor element axis, wherein each of said magnetic field sensor elements detects a component of a magnetic field which is parallel to the respective sensor element axis;
said three magnetic field sensor elements are fixedly positioned such that said magnetic field sensor element axes extending in three dimensions form a three dimensional Cartesian coordinate system,
wherein said magnetic field sensor elements are joined together at one end and each magnetic field sensor element comprises electrical contacts at the other end.
2. Magnetic field sensor device as claimed in claim 1 comprising a positioning element having three receptacles for fixedly positioning said magnetic field sensor elements with respect to each other.
3. Magnetic field sensor device as claimed in claim 1 , wherein said positioning element comprises at least two hollow tubes with respective receptacles for receiving said magnetic field sensor elements.
4. Magnetic field sensor device as claimed in claim 2 , wherein said positioning element is formed at least partially of a moulded plastic material.
5. Magnetic field sensor device as claimed in claim 1 , wherein each of said magnetic field sensor elements comprises a magnetic core and a winding that is connectable to an electric circuit.
6. Magnetic field sensor device as claimed in claim 5 , wherein the magnetic cores comprise nanocrystalline or amorphous magnetic material.
7. Magnetic field sensor device as claimed in claim 5 , wherein each of said magnetic field sensor elements comprises a carrier element.
8. Magnetic field sensor device as claimed in claim 7 , wherein said carrier element comprises two contacts for contacting the ends of the winding, each of said contacts being adapted to be connected to electrical circuitry.
9. Magnetic field sensor device as claimed in claim 8 , wherein the contacts are arranged in a plane, said plane being defined by a circuit board.
10. Magnetic field sensor device as claimed in claim 9 , wherein the contacts are mounting pads for surface mounting said pads to the circuit board.
11. Magnetic field sensor device as claimed in claim 9 , wherein the contacts are mounting pins for pin-through-hole mounting said pins to the circuit board.