Current sensor device and measuring method based on TMR tunnel magnetoresistive device
A technology of current sensor and tunnel magnetoresistance, which is applied in the field of sensors, can solve the problems of large power consumption, etc., and achieve the effects of improved temperature drift performance, high sensitivity, and strong anti-interference ability
Inactive Publication Date: 2019-07-23
CHINA ELECTRIC POWER RES INST +1
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[0005] In order to solve the problems of large and high power consumption of existing magnetic sensor devices for measurement in the background technology, the present invention provides a current sensor device and a measurement method based on a TMR tunneling magnetoresistive device. The sensor device and measurement method sense the current to be measured by the TMR sensor, and calibrate the measurement result according to the temperature measured by the temperature sensor; the current sensor device based on the TMR tunneling magneto-resistance device includes:
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[0035] Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for the purpose of this thorough and complete disclosure invention, and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings are not intended to limit the invention. In the drawings, the same elements / elements are given the same reference numerals.
[0036] Unless otherwise defined, terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is to be understood that terms defined in commonly used dictionaries should be construed as having meanings consistent with the context in the related art, and should not be construed as idealized or overly formal...
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The invention discloses a current sensor device and a measuring method based on a TMR tunnel magnetoresistive device. The device comprises a current carrying wire, a TMR sensor, a signal conditioningunit and a temperature sensor; the current carrying wire is used for being connected with a measured current port so as to access a measured current; the TMR sensor is used for sensing a magnetic signal of the current carrying wire through a TMR tunnel magnetoresistive element and converting the magnetic signal into an electric signal; the signal conditioning unit is used for performing signal preprocessing on the electric signal output by the TMR sensor according to a preset rule; the temperature sensor is used for measuring the working temperature of the TMR sensor; the control unit is usedfor receiving the electric signal preprocessed by the signal conditioning unit, and converting the electric signal into a corresponding current signal through the preset rule; and the control unit compensates the electric signal according to the working temperature and a preset compensation model, and finally outputs the current signal.
Description
technical field [0001] The present invention relates to the technical field of sensors, and more particularly, to a current sensor device and a measurement method based on a TMR tunnel magnetoresistive device. Background technique [0002] Magnetic sensors are widely used in modern industry and electronic products to measure physical parameters such as current, position, and direction by sensing the strength of the magnetic field. In the prior art, there are many different types of sensors used to measure the magnetic field and other parameters, such as Hall elements, Anisotropic Magnetoresistance (AMR) elements or Giant Magnetoresistance (GMR) elements ) element is a magnetic sensor of sensitive element. [0003] Hall current sensors that are widely used are divided into open-loop Hall current sensors (direct discharge Hall current sensors) and closed-loop Hall current sensors (zero-flux Hall current sensors). The open-loop Hall current sensor consists of a magnetic core,...
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IPC IPC(8): G01R15/20G01R19/00G01R19/32
CPCG01R15/205G01R19/32G01R19/0092
Inventor 李求洋袁翔宇张蓬鹤熊素琴张卫欣刘崇伟成达张保亮陈思禹杨巍王雅涛秦程林
Owner CHINA ELECTRIC POWER RES INST