Magnetic field detection device and magnetic field measurement apparatus

• US 20030076094A1
• Filed: 10/03/2002
• Published: 04/24/2003
• Est. Priority Date: 10/18/2001
• Status: Abandoned Application

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Hoshino, Shigeki
• Application Number:
  US10/263,196
• Publication Number:
  US 20030076094A1
• Time in Patent Office: Days
• US Class Current: 324/247
• CPC Class Codes: G01R 33/0206 Three-component magnetometers

Abstract

The intensity of magnetic field elements is measured in three-dimensional directions at a high speed without reducing spatial resolution. A magnetic field detection device 10 has a first loop wiring 1 for detection of a magnetic field element along an X-axis, a second loop wiring 2 for detection of a magnetic field element along a Y-axis and a third loop wiring 3 for detection of a magnetic field element along a Z-axis. These loop wirings are formed on a multilayer printed circuit board 4. The first loop wiring 1, the second loop wiring 2, and the third loop wiring 3 are preferably formed in such positions as to be orthogonal to each other.

Claims

1. A magnetic field detection device which detects an intensity of magnetic field along three different directions, designated as an X-axis, a Y-axis, a Z-axis, comprising:

a first loop wiring for detecting a magnetic field intensity along said X-axis;

a second loop wiring for detecting a magnetic field intensity along said Y-axis;

a third loop wiring for detecting a magnetic field intensity along said Z-axis; and

a multilayer printed circuit board;

wherein said first loop, second loop and third loop are formed in said multilayer printed circuit board in such positions as to be perpendicular to said X, Y and Z axes, respectively.

2. The magnetic field detection device according to claim 1, wherein said X, Y and Z axes are orthogonal to one another.

3. The magnetic field detection device according to claim 1, wherein one of said three loop wirings is formed in a plurality of through holes in said multilayer printed circuit board.

4. The magnetic field detection device according to claim 1, wherein one of said three loop wirings is formed by a planar wiring on said multilayer printed circuit board and the other two loop wirings are formed in a plurality of through holes in said multilayer printed circuit board in such positions as to be orthogonal to each other.

5. The magnetic field detection device according to claim 1, wherein an end portion of each of said first, second and third loop wirings is connected to a ground wiring formed on said multilayer printed circuit board.

6. The magnetic field detection device according to claim 1, wherein said multilayer printed circuit board comprises at least three wiring layers.

7. The magnetic field detection device according to claim 1, further comprising:

at least one connector which connects said loops to at least one electronic element located outside said multilayer printed circuit board.

8. The magnetic field detection device according to claim 7, wherein each said connector is one of a coplanar type, a strip line type and a microstrip line type.

9. A magnetic field measurement apparatus which measures an intensity of magnetic field in three different directions, designated as an X-axis, a Y-axis, a Z-axis, comprising:

a magnetic field detection device according to claim 1;

an amplifier connected to at least one of said loop wirings;

a spectrum analyzer connected to said amplifier; and

control means for switching and performing said measurement.

10. The magnetic field measurement apparatus according to claim 9, wherein said amplifier is connect to all of said loop wirings.

11. The magnetic field measurement apparatus according to claim 9, further comprising two additional amplifiers, said amplifier and said two additional amplifiers each being connected to a respective one of said first, second and third loop wirings.