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Generalized magnetoelectric effect energy conversion method based on cantilever beam

A technology of magnetoelectric effect and energy conversion, which is used in the measurement of magnetic variables, the magnitude/direction of the magnetic field, and the use of electromagnetic devices for magnetic field measurement. It can solve the problems of high production cost, low sensitivity and strong external interference, and achieve high The effect of flexibility, high voltage electrical properties, good mechanical properties

Pending Publication Date: 2021-04-20
XIAN UNIV OF TECH
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Problems solved by technology

However, the magnetoelectric conversion methods based on the above effects have their own advantages, but also have their own shortcomings, which are mainly reflected in low sensitivity, complex structure, high production cost, harsh environmental conditions, and strong external interference.

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  • Generalized magnetoelectric effect energy conversion method based on cantilever beam
  • Generalized magnetoelectric effect energy conversion method based on cantilever beam
  • Generalized magnetoelectric effect energy conversion method based on cantilever beam

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Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0023] Referring to Fig. 1(a) and Fig. 1(b), a generalized magnetoelectric effect energy conversion method based on a cantilever beam, including a PVDF film sample 1, is sandwiched between the two poles of an electromagnet 3 with a cantilever beam structure on the experimental base 4 During the period, the electromagnet is driven by a DC voltage source 10 to generate a DC magnetic field with a maximum magnitude of 3500Oe. The Helmholtz coil 2 is connected with the voltage amplifier 8, and the AC magnetic field is provided by the Helmholtz coil 2 (the maximum amplitude is 30Oe). In the experiment, the magnitude of the DC magnetic field was measured in the air gap between the two poles of the electromagnet by a Teslameter (F.W.5080) 7 , and the direction of the DC magnetic field was perpendicular to the AC magnetic field generated by the Helmhol...

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Abstract

A generalized magnetoelectric effect energy conversion method based on a cantilever beam comprises the following steps of 1, fixing one end of a PVDF piezoelectric film, fixing the cantilever beam structure to the middle of a Helmholtz coil and the middle of the two poles of an electromagnet, such that the direction of an alternating-current magnetic field is perpendicular to the direction of a direct-current magnetic field, 2, setting an alternating-current magnetic field emitted by a Helmholtz coil to obtain a relationship between the output voltage of the PVDF sample and the direct-current magnetic field, 3, setting a magnetic field generated by the direct-current magnetic field generator, obtaining a current response by using a current amplifier and a lock-in amplifier, and obtaining a relationship between the output voltage of the PVDF sample and the frequency of the alternating-current magnetic field, 4, testing vibration parameters of the PVDF piezoelectric film by using a laser vibrometer system consisting of a sensor and a laser controller, and verifying that the researched electromagnetic effect is an electromagnetic coupling phenomenon through mechanical coupling interaction. The device has the characteristics of accurate and convenient magnetoelectric effect energy conversion.

Description

technical field [0001] The invention belongs to the technical field of energy conversion of magnetoelectric materials, in particular to a cantilever beam-based generalized magnetoelectric effect energy conversion method. Magnetoelectric conversion method of piezoelectric film based on cantilever beam structure under AC and DC magnetic fields. Background technique [0002] At present, with the rapid development of intelligent science and technology and electronic computer applications, a large number of sensors are required to detect and process energy information, and convert them into signals compatible with computers, which provides a huge platform for the development of magnetic sensors and forms a A promising magnetic sensor industry chain. Magnetic sensing is widely used in various aspects such as smart grid, geological exploration, natural disaster prediction, biomedicine, military equipment, etc., especially in the field of magnetic field detection. In the current m...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/10G01R33/06G01R33/028
Inventor 张嘉伟付庚王力
Owner XIAN UNIV OF TECH
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