The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 08, 2025
Filed:
Apr. 16, 2021
Multidimension Technology Co., Ltd., Zhangjiagang, CN;
James Geza Deak, Zhangjiagang, CN;
Zhimin Zhou, Zhangjiagang, CN;
MultiDimension Technology Co., Ltd., Zhangjiagang, CN;
Abstract
A magnetoresistive magnetic field probe with rotating electromechanical modulator () comprises: a bulk cylindrical base (), wherein the bulk cylindrical base () has a cavity structure, and a center axis of the bulk cylindrical base () overlaps with a z-axis of a cylindrical coordinate system; a first magnetic tile () and a second magnetic tile () attached to an outer side wall of the bulk cylindrical base (); and a magnetoresistive sensor () and a reference signal generator () located on the center axis of the bulk cylindrical base (). During operation, the bulk cylindrical base () rotates about the z-axis at a frequency f, and the first magnetic tile () and the second magnetic tile () modulate an external magnetic field into a sensed magnetic field having a frequency 2f, and a measurement signal having a frequency 2f is output via the magnetoresistive sensor (). The reference signal generator () outputs a reference signal having a frequency 2f. The reference signal and the measurement signal are demodulated by an external processing circuit () to output a magnetic field value, so as to provide a measurement of the external magnetic field with superior signal-to-noise ratio. Through adding a detachable rotating sleeve to the magnetoresistive sensor (), superior signal-to-noise ratio measurement of the external magnetic fields can be realized. This invention is small in size with a simple structure, and the complexity of the process is also greatly reduced, enabling lower cost.