A Dynamic Model Calibration Method for Magnetic Sensor
A technology of a magnetic sensor and a calibration method, which is applied to instruments, measuring devices, measuring electrical variables, etc., can solve the problems of hysteresis, distortion, and inability to meet the measurement accuracy of the measured magnetic signal, meet the requirements of measurement accuracy, and has a simple structure. Effect
Inactive Publication Date: 2017-05-17
苏州中盛纳米科技有限公司
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[0003] An object of the present invention is to propose a dynamic model calibration method for a magnetic sensor to solve the problem in the prior art that the measured magnetic field signal is dynamic due to the inability to provide a standard high frequency alternating input excitation magnetic field for the magnetic sensor to be calibrated. Under changing conditions, due to the hysteresis and distortion of the magnetic sensor's response to the measured magnetic signal, the above method cannot meet the requirements of measurement accuracy.
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[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings. Such as figure 1 As shown, the method includes:
[0024] 101: Place a long straight wire on the central axis of the magnetic shielding cylinder. The long straight wire is connected to the signal source through the test resistance. When the signal source provides current for the long straight wire, the long straight wire A magnetic field can be generated around the wire, and the magnetic shielding cylinder can shield the interference of the earth's magnetic field and the magnetic field of the external environment.
[0025] 102: Select a high-precision magnetic sensor to be placed in the magnetic shielding cylinder, and the high-precision magnetic sensor detects the magnetic signal generated by the long straight wire in real...
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A dynamic model calibration method for a magnetic sensor is disclosed, comprising: placing a long straight wire on the central axis of a magnetic shielding cylinder, and selecting a high-precision magnetic sensor to be placed in the magnetic shielding cylinder to provide a feedback signal for a signal source ; Measure the position parameter of the magnetic sensor to be calibrated; the signal source sends out a typical signal, and collects a corresponding output signal; calculate the excitation input magnetic field of the magnetic sensor to be calibrated by the position parameter, and process the excitation input magnetic field and the magnetic field response output signal to calibrate the dynamic characteristics of the magnetic sensor to be calibrated. The present invention solves the problems in the prior art that the magnetic sensor responds to the measured magnetic signal hysteresis, The distortion phenomenon finally leads to the problem that the above method cannot meet the requirement of measurement accuracy.
Description
technical field [0001] The invention belongs to the technical field of calibration of magnetic sensors, and in particular relates to a dynamic model calibration method of magnetic sensors. Background technique [0002] The magnetic measurement accuracy of the magnetic sensor is not only affected by the scale factor, but also by the dynamic response model of the magnetic sensor. Therefore, in the field of magnetic signal detection, it is particularly important to accurately detect the dynamic magnetic signal. However, the existing magnetic sensor calibration mainly focuses on the static characteristic test and calibration, and the dynamic characteristic calibration is less. The reason is that the current standard magnetic field generator is based on the combination of the current source and the coil. Due to the influence of impedance, it is difficult to generate a standard high-frequency alternating magnetic field. The patents with application number 201010172592.7 and appli...
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IPC IPC(8): G01R35/00
Inventor 张晓明李杰丑修建刘俊
Owner 苏州中盛纳米科技有限公司