US 9,810,749 B2
Magnetic field measuring device with vibration compensation
Robert Jahns, Kiel (DE); Holger Runkowske, Probsteierhagen (DE); and Reinhard Knoechel, Elmshorn (DE)
Assigned to Christian-Albrechts-Universitaet zu Kiel, Kiel (DE)
Appl. No. 14/894,407
Filed by Christian-Albrechts-Universitaet zu Kiel, Kiel (DE)
PCT Filed May 27, 2014, PCT No. PCT/DE2014/100181
§ 371(c)(1), (2) Date Nov. 27, 2015,
PCT Pub. No. WO2014/194887, PCT Pub. Date Dec. 11, 2014.
Claims priority of application No. 13170893 (EP), filed on Jun. 6, 2013.
Prior Publication US 2016/0116552 A1, Apr. 28, 2016
Int. Cl. G01R 33/00 (2006.01); G01R 33/02 (2006.01); G01R 33/06 (2006.01); G01R 33/18 (2006.01); G01L 1/12 (2006.01); G01B 7/14 (2006.01); G01B 7/30 (2006.01); B81B 3/00 (2006.01)
CPC G01R 33/18 (2013.01) [B81B 3/0021 (2013.01); G01R 33/0005 (2013.01); G01R 33/0029 (2013.01); G01R 33/0082 (2013.01); G01R 33/06 (2013.01)] 10 Claims
OG exemplary drawing
1. A magnetic-field measurement device comprising
a holding body (1) and
a plurality of magnetoelectric bending-beam sensors (2, 2′, 2″) individually designed for outputting respectively one electric voltage signal while deflecting in the presence of a magnetic field, the bending-beam sensors being bonded to the holding body by force closure or adhesively/cohesively, wherein
a. the bending-beam sensors (2, 2′, 2″) are arranged with parallel-extending long axes for the detection of the magnetic field, and wherein
b. the magnetic-field measurement device is excitable to a mechanical oscillation when the magnetic field is a temporally periodic magnetic field, wherein it
c. develops in such a way that the magnetic-field measurement device exhibits at least one force node (F) on which at no time a resulting force acts that is caused by the oscillation,
d. the magnetic-field measurement device outputs a linear combination of the voltage signals of the bending-beam sensors, and
e. the introductions of vibrations into the entire arrangement by air-borne or structure-borne noise generate disturbance signals in all bending beams that cancel each other out as a result of a linear combination of all output voltages of the bending beams.