Annular TMR array sensor adaptive measurement method
A technology of array sensor and measurement method, applied in magnetic sensor array, magnetic sensor element measurement geometric arrangement, measurement device and other directions, can solve the problems of reducing measurement accuracy, interference, etc. The effect of relative error
Pending Publication Date: 2021-10-29
黑龙江省电工仪器仪表工程技术研究中心有限公司 +2
View PDF0 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, in actual engineering, since the iron core cannot completely shield the external magnetic field, the magnetic field source located outside the ring sensor will cause interference when measuring the target current, reducing the measurement accuracy
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0069] In order to more clearly illustrate the present invention or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings in the following description are only the present invention. For some embodiments described in the invention, those skilled in the art can also obtain other drawings based on these drawings without creative work.
[0070] The invention proposes a magnetic array self-adaptive measurement method on the basis of analyzing the influence of factors such as temperature and magnetic field on the measurement accuracy of the sensor. And a magnetic array measurement filtering algorithm based on the least mean square algorithm is proposed to realize the adaptive shielding of the external magnetic field and improve the measurement accuracy. Finally, a magnetic array model is established to further analyze the wo...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses an annular TMR array sensor adaptive measurement method, and belongs to the technical field of electric power sensor measurement. According to the method, a design scheme of a TMR sensor is firstly provided, the influence of factors such as temperature, a magnetic field and the like on the measurement precision of the sensor is analyzed by establishing transfer functions, TMR sensor transfer functions after offset voltage compensation, magnetic field interference consideration and external magnetic field shielding are established respectively, and by considering that a magnetic sensor array is easy to be interfered by an external magnetic field when measuring an internal magnetic field of an annular array to affect the measurement precision, a magnetic array adaptive measurement method for reducing magnetic field interference is provided based on an LMS algorithm, so that external stray magnetic field signals can be filtered by taking the magnetic field measured by the sensor in a certain period of time as input so as to achieve self-adaptive shielding of an external magnetic field and improve the measurement precision. Compared with a current clip-on current sensor measuring device, the method has a smaller average relative error, and meets the actual engineering requirements.
Description
technical field [0001] The invention relates to an adaptive measurement method for a ring type TMR array sensor, and belongs to the technical field of power sensor measurement. Background technique [0002] With the development of new energy systems such as photovoltaics, wind power, and electric vehicles, the demand for current transformers using non-contact isolation measurement technology in the power industry is increasing. However, traditional Hall current sensors have defects such as low sensitivity, high power consumption, and poor linearity, which cannot meet the requirements of complex electromagnetic environments. In order to achieve high-precision and low-cost current measurement, sensor technology with new materials is urgently needed. [0003] According to different sensor film materials, magnetoresistive sensors can be divided into anisotropic magnetoresistance (AMR), giant magnetoresistance (GMR), tunneling magnetoresistance (TMR) sensors, etc. Among them, t...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): G01R33/09G01R33/00
CPCG01R33/098G01R33/091G01R33/0029G01R33/0005G01R33/0094
Inventor陈月袁加梅金耀丁建顺王凯刘永鸽马赫刘鑫宇吴冬峰杜博马建魏星赵晓琪
Owner黑龙江省电工仪器仪表工程技术研究中心有限公司