57 results about "High frequency electromagnetic radiation" patented technology

There is provided a system for transmission of power and / or information between a first location external of a living body and a second position internal of the living body which comprises: (a) a primary controller (2) comprising a power source and a transmitter locatable at the first locations; and (b) an antenna (12) based device (10) locatable at the second position to receive an output from the transmitter, wherein the power source is adapted to emit high frequency electromagnetic radiation between 0.5 to 5 GHz. A medical appliance comprising a spring-based stent incorporating a monitoring device wherein the spring of the stent acts as the aerial for the monitoring device and wherein the medical appliance is capable of receiving electromagnetic radiation with a frequency between 0.5 to 5 GHz.

A cell control device according to the present invention includes: a discharge circuit that discharges each unit cell selected by the first switches among a plurality of unit cells connected in series; a charging circuit that charges each unit cell selected by the second switches among the unit cells connected in series, and; a voltage detection unit that detects a voltage of each unit cell via voltage detection lines respectively connected to positive and negative electrodes of the unit cells; an oscillator that irradiates high frequency electromagnetic radiation upon the voltage detection lines; and a charging control unit that controls switching of the first switches, thereby performing discharge of the each unit cell, and a charging control unit that controls switching of the second switches, thereby performing charging of the unit cells, based on voltages of the unit cells that are detected by the voltage detection unit.

The invention discloses a commercial power LED constant current driver, which comprises a rectification circuit and a filter circuit which are used for rectifying and filtering commercial power and outputting rectified alternating current, and also comprises a reference voltage source circuit, a stabilized voltage supply circuit, a voltage sampling circuit, a voltage comparator, an MOSFET and a third capacitor. The commercial power LED constant current driver can obviously reduce the cost of an LED driver circuit, has the equivalent performance and efficiency with a switching type LED drive circuit, has simple design, needs no transformer and inductive component, does not generate high-frequency electromagnetic radiation, and is safe to use.

A fully imidized, solvent-free polyimide foam having excellent mechanical, acoustic, thermal, and flame resistant properties is produced. A first solution is provided, which includes one or more aromatic dianhydrides or derivatives of aromatic dianhydrides, and may include one or more aromatic diamines, dissolved in one or more polar solvents, along with an effective amount of one or more blowing agents. This first solution may also advantageously include effective amounts respectively of one or mores catalysts, one or more surfactants, and one or more fire retardants. A second solution is also provided which includes one or more isocyanates. The first and second solutions are rapidly and thoroughly mixed to produce an admixture, which is allowed to foam—in an open container, or in a closed mold—under ambient conditions to completion produce a foamed product. This foamed product is then cured by high frequency electromagnetic radiation, thermal energy, or a combination thereof. Alternatively, the process is adapted for spraying or extrusion.

The invention discloses a material which comprises rare earth elements and iron nitrogen according to a phase ratio of 2:17 and has high capability of absorbing high-frequency electromagnetic radiation from 1G to 100G and an electromagnetic wave absorbing composite material which is made of the material and has better wave absorbing properties. The general formula of the electromagnetic wave absorbing material is R2Fe17N3-delta, and the preferred magnetization direction of the material meeting the general formula needs to be perpendicular to the C axis. In the general formula, R is one or a combination of any two of Y, Ce, Nd, Pr, Gd, Tb, Dy, Ho, Er, Tm and Lu. The method for preparing the electromagnetic wave absorbing material comprises the following steps of: adding the materials in an uncured binding material, thoroughly and uniformly mixing, then putting into a mold made of non-magnetic materials, and finally placing the mold in a magnetic field for orientation treatment.

This invention refers to a regionality thunder early warning method, which contains firstly affirming whether there is thundercloud generated electric field in the monitored area, then monitoring whether there is thundercloud generated very high frequency electromagnetic radiation wave in monitored area, finally sending the thunder warning. Said invention determines thunder electromagnetic radiation wave source range by processing the incident angle of thunder electromagnetic radiation wave to antenna according to the time difference of two channels received VHF radiation signal by double channels VHF receiver.

A high-frequency energy absorbing member is used with a disk drive carrier to attenuate high-frequency electromagnetic radiation emitted from a hard disk drive housed within the disk drive carrier. The use of the high-frequency energy absorbing member allows various other components of the disk drive carrier to be manufactured from less expensive materials which are ineffective at attenuating high-frequency electromagnetic radiation.

A process for making a fluoropolymer coated substrate comprising:applying an aqueous fluoropolymer dispersion coating composition comprising an aqueous medium and fluoropolymer particles with a fluorosurfactant content of less than about 300 ppm to a substrate to form a wet coating on the substrate, the aqueous fluoropolymer coating composition comprising added water soluble salt; anddrying the wet coating to form the fluoropolymer coated substrate by applying high frequency electromagnetic radiation to the wet coating, the added water soluble salt being effective to decrease the time required to dry the wet coating on the substrate by at least about 5% compared to an otherwise identical coating composition without the added water soluble salt.

A body shield (10) is disclosed for protecting a user from harmful thermal and electromagnetic radiation. The body shield includes a body portion (31) and a cover (32). The body portion has a multi-layered core (11) which is surrounded by an outer casing (12). The multi-layered core includes a first layer (14) of a magnetic metal alloy for shielding extremely low frequency electromagnetic radiation, a second layer (15) of a carbon based material for absorbing higher frequency electromagnetic radiation, and a third layer (16) of a non-magnetic material for conducting higher frequency electromagnetic radiation. The core may be incorporated into a body portion coupled to the device, a cover overlaying the device, or both.

A body shield (10) is disclosed for protecting a user from harmful thermal and electromagnetic radiation. The body shield includes a multi-layered core (11) which is surrounded by an outer casing (12). The multi-layered core includes a first layer (14) of a magnetic metal alloy for shielding extremely low frequency electromagnetic radiation, a second layer (15) of a carbon based material for absorbing higher frequency electromagnetic radiation, and a third layer (16) of a non-magnetic material for reflecting higher frequency electromagnetic radiation. The outer casing includes a thermal resistant top layer (18) and a thermal resistant bottom layer (19) sealed around its periphery to the top layer.

An actuator apparatus is described as having a stator device, a cover device, a contact device and an attenuation device. The stator device and the cover device are joined in such a manner so that a hollow space is formed between the stator device and the cover device. The cover device has an opening, through which the contact device is guided into the hollow space, so that the contact device runs at least partially in the hollow space and at least partially in the cover device. The attenuation device is positioned in the opening in such a manner so that a high-frequency electromagnetic radiation that travels through the opening is more highly attenuated by the attenuation device than the radiation would be attenuated without the presence of the attenuation device.

The present invention provides methods for the fabrication CNT dispersions using polysaccharides, especially hemicelluloses, and most advantageously xylan.The present invention also provides methods to isolate, and purify hemicelluloses from plant materials.The present invention provides methods and compositions for the coating of solid surfaces using CNT dispersions.One currently preferred method coating of a surface is electrospraying the CNT dispersion.The present invention provides electrically conducting materials that can replace conducting plastics, graphite, and even some metals as electrical conductors.In one embodiment the present materials can be used as stealth coatings.In another embodiment the present materials can provide shield against high frequency electromagnetic radiation, while being permeable to low frequency magnetic field.In one specific application the dispersion fabricated from double walled carbon nanotubes (DWNTs), and xylan can be used to fabricate transparent electrically conducting films.In one embodiment of the present invention the surface films will be cross-linked, and these films can be used in multiple applications including supercapacitors.

The invention discloses a slot waveguide theory-based electromagnetic radiation suppression structure and an application thereof. Periodic electromagnetic bang gap (EBG) structures are arranged between a packaging substrate and a heat dissipation packaging cover or between the packaging substrate and a radiator, so as to realize a boundary condition of PMC within the required frequency band to perform electromagnetic radiation suppression; specifically, the periodic electromagnetic bang gap structures refer to pin type two-dimensional metal EBG structures and mushroom type two-dimensional metal EBG structures which are in array and uniform distribution at intervals; and an air gap is formed between the electromagnetic bang gap structure and the packaging substrate, so that the distance between the bottom surface of the electromagnetic bang gap structure and the packaging substrate is less than 1 / 4 of corresponding wavelength of the center frequency of the working frequency bands. By adoption of the slot waveguide theory-based electromagnetic radiation suppression structure and the application thereof, the electromagnetic radiation in the working frequency bands can be effectively lowered, particularly, an obvious suppression effect is played on high-frequency electromagnetic radiation; miniaturization of design dimensions are realized; and the electromagnetic radiation suppression structure can be applied to packaging design of a chip, a printed circuit board and the like.

An end cap assembly for an electric motor has a brush assembly, a circuit board, an inductor and a grounded metal element. The brush assembly has a plurality of brushes. The circuit board is fixed relative to the brush assembly. The inductor is electrically connected to the circuit board. The grounded metal element is positioned between the brushes and the inductor to absorb high frequency electromagnetic radiation transmitted from the brushes to the inductor.

The invention discloses a welding fixture for a gear selecting and shifting flexible shaft support assembly. The welding fixture comprises a base plate, a clamping table, a clamping plate and a purifying tank, wherein electrohydraulic cylinders are arranged at the top of the base plate through bolts; the output ends of the electrohydraulic cylinders are connected with the clamping table; a high frequency electromagnetic radiation detector is arranged on one side of the clamping table through a mounting member; sliding rails are arranged at the top of the clamping table; clamping plates are arranged at the upper ends of the sliding rails; an arc-shaped clamping plate is arranged on the inner side of each clamping plate; a vertical clamping plate is arranged at the upper end of each arc-shaped clamping plate; fixed plates are arranged on two sides of the sliding rails; an electric telescopic rod is arranged on the inner side of each fixed plate through a mounting member; in addition, oneend of each electric telescopic rod is connected with the corresponding clamping plate; a rotating seat is arranged at one end of the top of the clamping table; a second fan is connected to one sideof the rotating seat through a connecting seat. The welding fixture disclosed by the invention has the advantages of simple operation and convenience in clamping, and can be used for absorbing and purifying welding fume and is suitable for popularization and use.

The present invention pertaining to the technical field of wireless application provides a safety and environmental protection type mobile communication terminal and a working method thereof. The terminal mainly comprises a mobile main-machine and a matching sub-machine, wherein, the mobile main-machine and the sub-machine are provided between them with a main-machine side low-power wireless communication part and a sub-machine side low-power wireless communication part for performing the transmission of control signals and Information signals, and the mobile main-machine and the sub-machine are respectively connected with a main-machine controller and a sub-machine controller, wherein, the main-machine controller is connected with an RF module and is provided with a main-machine identifying system and an emission selecting switch, and the sub-machine is provided with an RF emission part and is connected with the sub-machine controller. According to the method, the mobile main-machine can receive emission signals during communication through the sub-machine, but also can emit signals independently to communicate with a base station or other mobile communication terminals. The communication power consumption and high frequency electromagnetic radiation of the mobile main-machine are greatly reduced, and the present invention which is suitable for wide-range application development has the characteristics of safety, environmental protection, convenience, and energy-saving.

A body shield (10) is disclosed for protecting a user from harmful thermal and electromagnetic radiation. The body shield includes a body portion (31) and a cover (32) having sidewalls (80 and 81). The body portion has a multi-layered core (11) which is surrounded by an outer casing (12). The multi-layered core includes a first layer (14) of a magnetic metal alloy for shielding extremely low frequency electromagnetic radiation, a second layer (15) of a carbon based material for absorbing higher frequency electromagnetic radiation, and a third layer (16) of a non-magnetic material for conducting higher frequency electromagnetic radiation. The core may be incorporated into a body portion coupled to the device, a cover overlaying the device, or both.

A process for making a fluoropolymer coated substrate comprising: applying an aqueous fluoropolymer dispersion coating composition comprising an aqueous medium and fluoropolymer particles with a fluorosurfactant content of less than about 300 ppm to a substrate to form a wet coating on the substrate, the aqueous fluoropolymer coating composition comprising added water soluble salt; and drying the wet coating to form the fluoropolymer coated substrate by applying high frequency electromagnetic radiation to the wet coating, the added water soluble salt being effective to decrease the time required to dry the wet coating on the substrate by at least about 5% compared to an otherwise identical coating composition without the added water soluble salt.

The invention discloses a cement-based wave absorption material doped with iron tailings and a preparation method of the cement-based wave absorption material, belonging to the technical field of crossed electromagnetic and material science. The cement-based wave absorption material doped with iron tailings is prepared from dry powder materials, aggregate and external doping materials, wherein the dry powder materials are ordinary silicate cement and silica fume; the aggregate is quartz sand and iron tailings; and the external doping materials are a water reducing agent, a gas initiator and water. The invention further provides the preparation method of the cement-based wave absorption material. A product prepared from the cement-based wave absorption material is not only remarkable in absorption on ultra-high frequency electromagnet valves within the range of 6-18GHz, but also good in absorption on extreme-high frequency electromagnet waves within the range of 26-40GHz, so that the damage of the extreme-high frequency electromagnetic radiation to the environment and human bodies is greatly alleviated, and the material is an excellent cement-based wave absorption material.

An electronic assembly with RFI shielding including a circuit board, a high frequency electromagnetic radiation device, and a shielding cover is provided. The circuit board includes a connector. The high frequency electromagnetic radiation device is detachably inserted to the connector of the circuit board to be electrically connected with the circuit board. The shielding cover is detachably assembled to the connector to be opened or closed relative to the circuit board. The shielding cover shields high frequency radiation generated by the high frequency electromagnetic radiation device when the shielding cover is in a closed state, and at least a portion of the shielding cover contacts the circuit board in the closed state, and the shielding cover is electrically connected to a grounding portion of the circuit board via the connector.

A system for removing one or more streams of distorted high-frequency electromagnetic radiation. Each stream is directed substantially in a first direction from the Earth's surface and creates a distorted electromagnetic field. The system has an antenna for receiving the electromagnetic radiation and a capacitor electrically connected to the antenna. The capacitor converts the electromagnetic radiation into a form of potential energy with a frequency equivalent to zero and stores the potential energy. Each stream is substantially removed upon the conversion of the electromagnetic radiation into the potential energy.

The invention relates to a system and a method for researching the bioelectricity effect of high-frequency electromagnetic radiation on in-vitro excitable cells. Terahertz waves are designed and constructed from top to bottom by utilizing an electrophysiological recording system and a microscope observation system for adherent growth culture cells, synchronous detection of real-time irradiation terahertz and electrophysiological characteristics of adherent growth in-vitro culture neurons and other excitable cells can be realized, and the system is simple to operate and high in repeatability. On one hand, a terahertz source is integrated into an electrophysiological recording system and is fixed on an electric three-dimensional micromanipulator, so that the terahertz source can be moved freely and accurately; meanwhile, terahertz waves invisible to naked eyes are combined with the visible light laser positioning sighting device, and the irradiation position of the terahertz waves is determined. And on the other hand, the attenuation degree of terahertz waves in the liquid is reduced by controlling the liquid level height of the electrophysiological recording chamber, namely the culture dish, so that the neurons are irradiated in real time, and electrophysiological indexes are recorded in real time.

The invention discloses an electrode of a radio frequency generator. The electrode comprises an electrode plate (1), wherein the electrode plate (1) is placed inside the radio frequency generator and is connected with a power supply (2); the electrode plate (1) generates high-frequency electromagnetic radiation to radiate and kill bacteria in turned soil after being electrified. The electrode has wide application range and can be used for killing bacteria in pseudo-ginseng fields, the application range is wide, and the use effect is high.

The invention relates to the technical field of heating and ventilation and electromagnetic shielding, and particularly discloses an integrated miniature machine room with a high and low frequency electromagnetic shielding function. The machine room comprises a first high and low frequency electromagnetic shielding box used for installing a server and shielding high and low frequency electromagnetic radiation, a second high and low frequency electromagnetic shielding box used for installing refrigeration equipment and shielding the high and low frequency electromagnetic radiation, and an electrical grounding component electrically connected with the first high and low frequency electromagnetic shielding box and the second high and low frequency electromagnetic shielding box. According to the machine room provided by the invention, static electricity generated by electromagnetic radiation is imported into the earth via the grounding device via the high and low frequency shielding dual Faraday cage electrical short connected component in combination of an electromagnetic radiation preventing door structure, so that high frequency electromagnetic radiation and low frequency electromagnetic radiation are shielded, the electromagnetic safety protection capacity of the server is improved, the high and low frequency electromagnetic shielding boxes have temperature adjustment functions via the refrigeration equipment, the miniature structure can be movable via a trundle mechanism, and the miniature machine room is simple in structure and high in practicability.

The invention discloses a soil purifier and a purifying method thereof. The soil purifier comprises an unmanned tractor, a power system of the unmanned tractor is in transmission connection with a speed change control system, the output end of the speed change control system is connected with a serve power generator, a PLC (programmable logic controller) is mounted on a rack of the unmanned tractor and is in control connection with the speed change control system, and an electromagnetic wave transmitter and a plurality of electrode sets are mounted at the bottom of the rack; an ultrasonic detector is mounted at the bottom of the rack and is in signal connection with the PLC, and a coder is mounted on the servo power generator and is in signal connection with the PLC. Activities of microorganisms in soil are detected through the ultrasonic detector, double effects of pulse voltage breakdown and high-frequency electromagnetic radiation are utilized to kill molluscous microorganisms like root-knot nematode, killing is thorough, good in effect and high in efficiency, the soil purifier is environment-friendly, the problem of pesticide residue on crops is avoided, and the soil purifier is suitable for popularization and application.