Energy exchanging device for magnetoelectric resonance
A resonance and magnetoelectric technology, applied in the field of piezoelectric devices, can solve the problems of large measurement system, restrictions on the wide application of magnetic field measurement, and cost increase.
Inactive Publication Date: 2013-11-06
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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Problems solved by technology
However, with the improvement of measurement accuracy, the cost of these field-weakening measuring instruments has been greatly increased, and the measurement system has become huge, which greatly limits the wide application of field-weakening measurement.
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[0016] Show the complete process of preparing a new type of magnetoelectric resonant transducer device, test the characteristics of the transducer changing with the frequency of the signal, and test the characteristics of the step-up ratio of the piezoelectric material with the amplification function changing with the frequency, based on the above results Debugging and optimization to complete the best working state.
[0017] The structure of the magnetoelectric resonance transducer is as follows: figure 1 As shown, select (1-x)PMN-xPT crystals grown by the improved Bridgman method with or orientation and a composition of 0.20≤x≤0.34 to produce piezoelectric material 2 . Magnetostrictive materials 1 and 3 made of Terfenol-D alloy. The size of PMN-PT is 22×2×1mm 3 , Terfenol-D size is 22×2×1mm 3 . Lead electrodes 4 and 5 from the upper and lower surfaces of 1 and 3. The bonding between 1, 2 and 3 uses conductive epoxy resin glue. The output voltage between the upper and ...
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The invention relates to a magneto-electric resonant transducer. In the field of transduction, the transducer of the invention can effectively realize the conversion from the quantity of magnetism to electric energy and pertains to the field of electrical accessories. The transducer of the invention comprises piezoelectric materials (1, 3 and 4), a magnetostrictive material (2), a lead wire (5) used for connecting the piezoelectric material 1 and the piezoelectric material 4, a lead wire (6) used for connecting the piezoelectric material (3) and the piezoelectric material (4), a voltage output terminal (7) used for connecting the piezoelectric material (3) and the piezoelectric material (4) and a public ground terminal (8) used for connecting a piezoelectric material (7) and the piezoelectric material (1). Three layers of materials of the piezoelectric material (1), the magnetostrictive material (2) and the piezoelectric material (3) are bonded by a conductive adhesive and the thickness ratio of the three layers of materials is optimized to be 1:0.5 to 0.8:1. The magneto-electric resonant transducer of the invention can precisely realize the conversion from the magnetic field intensive quantity to voltage; meanwhile, the magneto-electric factor can be as high as 57.3 V / Oe under resonant frequency.
Description
technical field [0001] The invention relates to a high-performance magnetoelectric resonance transducing device, which belongs to the field of piezoelectric devices. Background technique [0002] In the field of magnetic field detection, the measurement of weak magnetic field has very extensive and important significance. It is mainly used in the measurement of the geomagnetic field, the measurement of the magnetic field of the moon, Venus, Mars and other outer space, marine magnetic survey, ground magnetic survey, geomagnetic pulsation survey, Ship magnetic measurement, inclinometer while drilling in oil drilling, human magnetic field, human magnetocardiogram, human magnetoencephalogram and other medical measurement fields. [0003] Commonly used weak magnetic field measuring instruments include mechanical magnetometer, fluxgate magnetometer, proton precession magnetometer, optical pump magnetometer, superconducting quantum magnetometer, etc. However, with the improvement ...
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IPC IPC(8): H03H9/00C30B29/32C30B29/30
Inventor 罗豪甦贾艳敏王飞飞赵祥永焦杰徐海清林迪潘晓明
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI