The invention belongs to the field of the sensor, especially a magnetic field visual sensor based on a magnetoelectric-electrochromic effect. The magnetic field visual sensor comprises a magnetoelectric heterojunction device, a rectifier and an electrochromic device; the magnetoelectric heterojunction device is connected with an AC input end of the rectifier, a positive port of a DC output end ofthe rectifier is in electrode connection with a transparent anode of the electrochromic device, and a negative port of the rectifier is in electrode connection of the transparent cathode of the electrochromic device, thereby forming an integer circuit. The magnetic field visual sensor proposed by the invention prepares the magnetic field sensor by using a magneto-electric heterojunction device, since the magneto-electric heterojunction device has the advantages of being low in cost, high in sensitivity, small in volume, and low in power consumption, the magnetic sensor with high sensitivity, miniaturization, wide temperature range, low power consumption, wide frequency band, large range, low cost and obvious comprehensive advantages can be prepared; and an electric signal is collected by using the electrochromic device, the signal can be directly converted into direct color response, thereby realizing the visualization of the magnetic field signal.

Magnetic field visual sensor based on magnetoelectric-electrochromic effect

The invention discloses a novel pressure sensitive element structure, which relates to the technical field of flexible pressure sensors. The novel pressure sensitive element structure comprises a flexible piezoelectric polymer film, a first plane electrode plate attached to the upper surface of the flexible piezoelectric polymer film and a second plane electrode plate attached to the lower surfaceof the flexible piezoelectric polymer film, wherein no direct electrical contact is set between the first plane electrode plate and the second plane electrode plate. The structure of the flexible piezoelectric polymer film is selected from but not limited to one or more structures in a bent structure, a bridge structure and an arc structure, and the force mode is not limited to tension, twistingand extrusion. When tension, twisting or extrusion happens to the bent flexible piezoelectric polymer film, significant deformation is generated in directions parallel with and vertical to the orientation of dipoles inside the bent flexible piezoelectric polymer film, the piezoelectric response of longitudinal piezoelectric effects to the whole film is thus improved, the purpose of increasing thepiezoelectric response of the flexible piezoelectric polymer film is achieved, and the application prospect is great.

Novel pressure sensitive element structure

The invention discloses a magnetoelectricity antenna based on magnetostrictive piezoelectric materials. The magnetoelectricity antenna comprises a magnetostrictive material layer, a piezoelectric material layer, an interdigital electrode and a silicon suspension substrate. A preparation method of the magnetoelectricity antenna based on the magnetostrictive piezoelectric materials comprises the steps that firstly a whole silicon substrate is subject to corrosion to enable the whole silicon substrate to become the silicon suspension substrate, a magnetron sputtering method is further adopted tomake the interdigital electrode on the surface of the silicon suspension substrate, the magnetron sputtering method is further adopted to deposit the piezoelectric material layer on the interdigital electrode, and finally the magnetron sputtering method is adopted to deposit magnetostrictive material layer on the piezoelectric material layer to obtain the magnetoelectricity antenna. The antenna utilizes the magnetostrictive effect to transform electromagnetic wave into mechanical vibration, and utilizes a highly sensitive vibration induction system to transform the mechanical vibration into electrical signals, indirect induction of the electromagnetic wave can be realized, the magnetoelectricity antenna is not limited by the electrics antenna lambada/4 wavelength theory and has the advantages of being high in sensitiveness and miniaturized, and the size of an existing antenna can be reduced by several orders of magnitudes.

Magnetoelectricity antenna based on magnetostrictive piezoelectric materials and preparation method thereof

The utility model relates to a reduce magnetism electric sensor sensing element of vibration noise, including magnetostrictive material layer, piezoelectric material layer, wherein the piezoelectric material layer includes flexible interdigital electrode, the piezoelectricity fibre, and the piezoelectricity fibre circular telegram polarization and the output signal of telecommunication are given for the positive negative pole that is used for connecting interdigital electrode to the wire. The piezoelectric material layer respectively has one deck magnetostrictive material layer from top to bottom, with the epoxy forming space sandwich structure that bonds between the three -layer. Sensing element's bending structure uses at the bonding in -process through epoxy to have certain radial cylindrical mould among the magnetism electric sensor, and the pressure that utilizes vacuum bag compression makes this structure be the solidification of curved curved attitude, under the circumstances of output same size's magnetoelectric signal, has reduced the influence of extraneous vibration to the sensor, has improved the magnetic field detection sensitivity in the practical application environment.

Reduce magnetism electric sensor sensing element of vibration noise

The invention relates to a sensitive element in a magnetoelectric sensor. The sensitive element comprises magnetostrictive material layers and a piezoelectric material layer, wherein the piezoelectric material layer comprises a flexible interdigital electrode and piezoelectric fibers, and wires are used for connecting the positive electrode and the negative electrode of the interdigital electrode to electrify and polarize the piezoelectric fibers and outputting electric signals. The two magnetostrictive material layers are arranged on the upper portion and the lower portion of the piezoelectric material layer respectively, and the three layers are bonded with epoxy resin to form a spatial sandwich structure. A bending structure of the sensitive element in the magnetoelectric sensor is formed in the way that a cylindrical mold with a certain radius is used in the bonding process through epoxy resin, and the structure is cured in a bent state with the pressure of vacuum bag compression; under the situation that magnetoelectric signals of the same magnitude are output, the influence of external vibration on the sensor is reduced, and the magnetic field detection sensitivity in the practical application environment is improved.

Magnetoelectric sensor sensitive element capable of reducing vibration noise

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Reduce magnetism electric sensor sensing element of vibration noise

Magnetoelectric sensor sensitive element capable of reducing vibration noise