Space Magnetic Field Measurement System Based on Visual Positioning
A technology of magnetic field measurement and visual positioning, applied in the field of measurement, to achieve the effect of high sensitivity and convenient measurement
Active Publication Date: 2021-04-30
UNIV OF SHANGHAI FOR SCI & TECH
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[0004] The present invention is aimed at the problem of spatial magnetic field measurement, and proposes a spatial magnetic field measurement system based on visual positioning. A label is attached above the magnetic field measuring device, and a binocular vision system is formed with multiple cameras, so that the measuring device can be measured in the world. The specific coordinates in the coordinate system and the attitude of the measuring device are fused with the measurement results of the magnetic field measuring device to accurately measure the magnetic field information of the magnetic field space to be measured
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[0015] The space magnetic field measurement system based on visual positioning in the present invention captures the position of the measuring device after fixing the positions of several cameras, and fuses the magnetic field information measured by the magnetic field measuring device with the position and posture of the measuring device captured by the camera to obtain the magnetic field in space strength information. Such as figure 1 The schematic diagram of the overall structure of the embodiment of the spatial magnetic field measurement system based on visual positioning and figure 2 The signal transmission relationship diagram of the embodiment includes a magnetic field measuring device 101, a plurality of cameras 103, an amplifier 104, a data acquisition card 105 and a computer system 106; wherein, a visual positioning label 201 is attached above the magnetic field measuring device 101 to facilitate the above-mentioned cameras 103 for image recognition, the inside of t...
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The invention relates to a space magnetic field measurement system based on visual positioning. At least three visual positioning labels that are not on the same straight line are pasted on the magnetic field measuring device. The magnetic field measuring device is equipped with three linear Hall elements whose axes are perpendicular to each other. A camera captures the position signal of each visual positioning label on the magnetic field measuring device and sends it to the computer system; after the linear Hall element in the magnetic field measuring device detects the spatial magnetic field signal to be measured, the magnetic field signal is amplified by the amplifier and then sent to the computer through the data acquisition card through analog-to-digital conversion Computer system, the computer system calculates the position and orientation of the magnetic field measurer through the position signals of each visual positioning tag, and the computer system synthesizes the direction and magnitude of the magnetic field strength through the signals collected by each linear Hall element, and fuses the magnetic field information with the position and orientation to obtain the magnetic field in the space strength information. It has the advantages of convenient measurement, high precision and high sensitivity.
Description
technical field [0001] The invention relates to a measurement technology, in particular to a space magnetic field measurement system based on vision positioning. Background technique [0002] The Hall element is a semiconductor using the Hall effect. It is a magnetic sensor based on the Hall effect, which has developed into a variety of magnetic sensor product families and has been widely used. They can be used to detect magnetic fields and their changes, and can be used in various occasions related to magnetic fields. The Hall linear device has high precision and good linearity; the Hall voltage changes with the change of the magnetic field strength. The stronger the magnetic field, the higher the voltage, the weaker the magnetic field, and the lower the voltage. The Hall voltage value is very small, usually only a few Millivolts, but amplified by an amplifier in an integrated circuit, the voltage can be amplified enough to output a stronger signal. Therefore, the measur...
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IPC IPC(8): G01R33/07
CPCG01R33/07
Inventor 秦晓飞吴承梓郑超阳张一鹏郭海洋
Owner UNIV OF SHANGHAI FOR SCI & TECH