10 results about "Low frequency magnetic field" patented technology

Tumor glycocalyx may be regarded as a glycan “canopy” above the tumor plasma membrane. Disclosed are methods of treating a neoplastic malignant cell cancer wherein the neoplastic malignant cancer cell has a malignant glycocalyx B. Also disclosed are methods of inducing apoptosis of one or more neoplastic malignant cells and methods of increasing a subject's responsiveness to an immunotherapy wherein the neoplastic malignant cancer cell has a malignant glycocalyx B.

The present application relates to a kind of low-frequency magnetic field generator for rat electromagnetic experiment and its uniform area measuring method, the method includes the following steps: S1, analysis display terminal calculates the magnetic induction intensity distribution of Helmholtz coil under given condition, and according to the change of magnetic induction intensity relative error determines the uniform area of magnetic field distribution, is recorded as reference area, corresponding boundary is reference boundary;S2, using magnetic field probe coil measures the magnetic induction intensity on reference boundary;S3, least square method is applied to obtain the measured boundary of magnetic field distribution uniform area;S4, according to the average absolute percentage error of magnetic induction intensity at measured boundary and reference boundary determines its actual uniform boundary;S5, analysis display terminal displays the actual uniform area of Helmholtz coil magnetic field distribution under given current amplitude and frequency, for rat electromagnetic experiment.Compared with prior art, the present application has the advantages of obtaining accurate magnetic field uniform area, reducing test workload and the like.

This application discloses a personnel rescue method based on low-frequency magnetic field communication, comprising: real-time acquisition of vital sign information of the person to be rescued to construct personnel status information; encoding the personnel status information to generate personnel status data; real-time modulation of a low-frequency magnetic field signal using the personnel status data to generate a corresponding real-time personnel status signal and radiating it outward; real-time reception of the personnel status signal using multiple magnetic field receiving units not on a straight line; and determination of the location, identity information, and vital status of the person to be rescued based on the personnel status signal. This application utilizes the physical characteristic of low-frequency magnetic field signals having minimal attenuation when penetrating obstacles such as rock layers and soil, combined with improved pulse coding technology, to achieve simultaneous detection of vital sign data, location, and identity information of trapped personnel, providing accurate and powerful reference information for optimizing rescue plans and significantly improving the efficiency of personnel rescue.

This invention discloses a mobile terminal-based contactless anti-theft method and device based on the frequency domain characteristics of low-frequency magnetic fields. The method involves activating a magnetic field transmitting module to emit a set low-frequency magnetic field. Based on this magnetic field, a dual-mode sensing receiver collects raw three-axis magnetic field data. After high-pass filtering to remove the DC component of the Earth's magnetic field, three-dimensional AC magnetic field data is obtained. The Euclidean norm of the three-dimensional AC magnetic field data is calculated, converting it into a one-dimensional scalar signal. Based on this one-dimensional scalar signal, the Gosser algorithm is used to extract the magnetic field energy value corresponding to the target frequency in the magnetic field. The data is then demodulated and the area identification code is verified to obtain the verification result. Combining the magnetic field energy value and the verification result, a hysteresis comparison and multi-level decision logic are used to determine the security status of the protected object. When the alarm triggering conditions are met, the corresponding alarm operation is executed. This invention solves the problems of poor physical connection experience, susceptibility to false alarms due to wireless radio frequency obstruction, and high hardware tag costs in existing technologies.

This invention relates to an energy harvester (7) and charger (1) system that utilizes rotating magnetic field technology to meet the energy needs of biomedical devices that are implantable into the body by a minimally invasive method. This technology aiming to solve the problem of battery depletion in devices such as pacemakers will significantly reduce the dependence on surgical interventions. The charger (1), electric motor (3), and permanent magnets (6) provide the energy harvester (7) with a variable magnetic field. The energy harvester (7) converts alternating current into direct current by generating electric current in its coil / coils (8) with this magnetic field. The generated energy is stored in a rechargeable battery (12) in accordance with the levels required by biomedical devices. The system works with low-frequency magnetic fields to keep SAR values within safe limits and minimizes negative effects such as tissue heating. It also ensures efficient energy production. The materials used in the energy harvester are biocompatible and toxic effects are avoided. The invention reduces the risks of surgery and increases patient comfort with its minimally invasive nature. It provides economic and health advantages by reducing the frequency of battery replacement of implantable devices such as pacemakers. It can also be used in other biomedical devices such as defibrillators, neurostimulators, cochlear implants, and retinal implants.

The utility model discloses lightning -resistant electromagnetic shielding cabin structure of wind generating set variable pitch system relates to wind generating set shielding cabin field, including cabin body, one side fixed mounting of cabin body has hinged seat, one side of cabin body is provided with hatch, and the hinged seat is rotatably installed between hatch, shielding subassembly, shielding subassembly sets up inside cabin body, wherein, shielding subassembly includes ground point, shielding part. The utility model discloses through setting up cabin body shell of composite structure, is cabin body, middle layer, inner layer respectively, when high frequency electromagnetic wave is transmitted into cabin, produces intense " reflection effect " in aluminum alloy, stainless steel surface layer, and reflection loss can reach 20 40db, realizes high frequency radiation shielding, and when low frequency radiation passes through nickel iron alloy surface, can " bind " low frequency magnetic field in metal inside, through magnetic hysteresis loss fast attenuation magnetic field energy, avoids the influence of radiation to cabin internal structural member.

The utility model discloses a shielding anti -interference's flywheel converter cabinet body, through the division structure divides the cabinet body for power area and control area, realizes two area physical isolation, blocks the cross -region electromagnetic coupling while promoting space utilization. The division structure adopts the metal partition made of aluminium -zinc coated sheet or galvanized steel sheet, forms one -level area shielding, effectively absorbs the low -frequency magnetic field interference of strong electric component of power area, is equipped with at least one pull -out box in control area, and the box body shell adopts aviation aluminium alloy material and is equipped with the conductive coating in the joint, forms two -level box shielding, forms strong reflection to high -frequency electromagnetic radiation, realizes full -band electromagnetic protection. Power area and control area pass through the layout optimization component installation of division, and the pull -out box body design is convenient for maintaining, and shielding layer does not need to dismantle, and the cabinet frame, the plate assembly etc. adopt aluminium -zinc coated sheet or aviation aluminium alloy and are connected through riveting process, and cooperate directional threading hole structure, and further strengthen the anti -interference effect.

A semiconductor device has a substrate and an electrical component disposed over the substrate. An encapsulant is deposited over the electrical component and substrate. A magnetic film material is formed over the encapsulant. The magnetic film material may extend down a side surface of the semiconductor device. The magnetic film material is subject to laser spike annealing in a magnetic field. A shielding layer is formed over the magnetic film material. The laser spike annealing of the magnetic film material in the magnetic field can be done after forming the shielding layer. The shielding layer may extend down a side surface of the semiconductor device. A first magnet is disposed on a first side of the semiconductor device. A second magnet is disposed on a second side of the semiconductor device opposite the first side of the semiconductor device.

The application provides a low-frequency magnetic field detection system based on a hollow sphere cavity, and high-sensitivity low-frequency magnetic field information detection can be realized by measuring a to-be-detected low-frequency signal superimposed on a high-frequency modulation signal. The frequency of the high-frequency modulation signal is consistent with the mechanical mode of the cavity, the structure parameters of two hollow sphere cavities on the left and right sides of the three hollow sphere cavities are changed through an electrostrictive medium, the mechanical mode of the sensing unit is changed, and the sensing unit has stronger low-frequency magnetic field detection capability. The advantage of the system is that tuning the mechanical mode frequency does not change the optical quality factor of the hollow sphere cavity where the light field transmission is located, so that the sensitivity of the sensing system is not reduced due to the regulation of the mechanical mode frequency. The application provides a new technical means for optical resonant cavity low-frequency magnetic field detection.