Magnetic resonance coupling space high-frequency magnetic field intensity measurement device and method

A technology of magnetic field strength and coupling space, applied in measuring devices, measuring magnetic variables, instruments, etc., can solve the problems of low sensitivity of magnetic sensors, and achieve the effect of solving mutual influence, reducing adverse effects, and facilitating synchronous networking

Pending Publication Date: 2017-10-20
NANJING UNIV OF INFORMATION SCI & TECH
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Problems solved by technology

[0004] In order to solve the technical problems raised by the above-mentioned background technology, the present invention aims to provide a magnetic resonance coupling space high-frequency magnetic field intensity measurement device and method, which can realize space high-frequency magnetic field measurement and reduce the sensor’s negative response to the space in the strong coupling state of the existing sensor. Measure the influence of magnetic field or adjacent magnetic sensor, and make up for the low sensitivity of magnetic sensor under weak coupling

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  • Magnetic resonance coupling space high-frequency magnetic field intensity measurement device and method
  • Magnetic resonance coupling space high-frequency magnetic field intensity measurement device and method
  • Magnetic resonance coupling space high-frequency magnetic field intensity measurement device and method

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[0030] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0031] Such as figure 1 As shown, a magnetic resonance coupling space high-frequency magnetic field intensity measurement device includes a coil installation slot A, a connector B and a signal processing circuit printed board C, and the induction coil is installed in the circular groove of A. In this example, the induction coil is wound with a coaxial cable. In order to take into account the frequency band and sensitivity of the induction coil, the number of turns of the induction coil is set to 1 turn, the radius of the coil is 2.5cm, the radius of the coil wire is 0.4mm, and the coil inductance 100nH. The above C is vertically connected to A through the connector B, that is, the signal processing circuit printed board C is perpendicular to the plane where the induction coil is located, so that the magnetic field generated by C is perpend...

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Abstract

The present invention discloses a magnetic resonance coupling space high-frequency magnetic field intensity measurement device and method. The device comprises a coil installation groove, a connection piece and a signal processing printing circuit board. An induction coil is installed in the coil installation groove, and the signal processing printing circuit board is connected with the coil installation groove through the connection piece. The signal processing printing circuit board comprises a variable damping resonant network, an input buffer stage, a peak detection circuit, a variable gain amplification circuit, a sampling holder, an ADC switching circuit, a microprocessor and a single-pole double-throw switch. The magnetic resonance coupling space high-frequency magnetic field intensity measurement device and method regulate the damping state of a variable damping resonant network to find a resonance peak to allow the sensor and a space magnetic field to keep in a critical coupling state so as to realize measurement of a magnetic field, reduce the influence of a current sensor on the space magnetic field to be measured or an adjacent magnetic sensor in a strong coupling state, and make up the deficiency of low sensitivity of the magnetic sensor in weak coupling.

Description

technical field [0001] The invention belongs to the technical field of magnetic field measurement, and in particular relates to a magnetic resonance coupling space high-frequency magnetic field intensity measurement device and method. Background technique [0002] Magnetic field measurements are now inseparable from almost any technical field. Taking wireless power transmission technology as an example, magnetic fields are now mainly used as energy transmission channels. Magnetic resonance coupling wireless power transmission technology uses high-frequency magnetic resonance coupling to achieve efficient long-distance power transmission. The mutual inductance coupling coefficient between the transceiver coils directly affects the transmission distance and efficiency of the system. Synchronous detection of spatial magnetic field strength is the most direct method to accurately analyze the mutual inductance coupling coefficient, so it is of great significance to design a sens...

Claims

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Application Information

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IPC IPC(8): G01R33/10
CPCG01R33/10
Inventor 吕富勇祖旭明李春辉马芙蓉周瑞卿阮世阳晁博李鹏生江鸿唐迎川
Owner NANJING UNIV OF INFORMATION SCI & TECH
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