102results about How to "Protection against electromagnetic radiation" patented technology

A laminated structure for PCB is composed of ground layer, power supply layer, power supply layer and ground layer. Said two power supply layers between two grounding layers are positioned symmetrically at central position of whole PCB. A 12-layer PCB is composed of the 6th and the 7th power supply layers, the second, the 5th, the 8th and 11th ground layer, and the first, the third, the 4th, the 9th, the 10th and the 12th signal layers. The 14-layer and 16-layer PCBs are also disclosed.

The invention discloses an intelligent baby stroller mainly characterized in the Internet of Things. According to the intelligent baby stroller, information interaction with the baby stroller is realized by using a mobile phone APP; various information of the baby stroller can be checked; various actions of the baby stroller can be controlled; the baby stroller can automatically start a cradle and play children's songs through detection of baby cry; strong light can be detected by a light ray detector and a sunshade net is closed; a humidity detection module judges whether a baby carries out bed-wetting according to humidity information and reminding is given out; a built-in color screen of the baby stroller can display time and information such as temperature and baby weight detected by sensors; and automatic control and real time monitoring are realized.

The invention provides a facial Qingpingle powder which is characterized by comprising the following active pharmaceutical ingredients in parts by weight: 40-50 parts of aloe, 20-25 parts of honeysuckle flower, 30-35 parts of rose, 1-1.5 parts of saffron, 15-20 parts of kuh-seng, 15-20 parts of licorice root, 15-20 parts of wistaria flower, 6-8 parts of ginseng, 6-8 parts of red ginseng, 20-25 parts of ginseng, 9-12 parts of angelica, 20-25 parts of chrysanthemum flower, 35-45 parts of Jasminum grandiflorum and 45-50 parts of lucid ganoderma. The preparation method comprises the following steps: a. respectively weighting the active pharmaceutical ingredients in parts by weight for later use; b. respectively grinding the active pharmaceutical ingredients into powder; and c. evenly mixing, and bagging. The invention has the functions of diminishing inflammation, relieving itching, removing diseases and nourishing the face, can promote skin metabolism to proceed orderly and quickly, has stable and obvious curative effect, and is easy to produce.

The invention relates to an instantaneous water heater achieving high-frequency electromagnetic induction heating. Based on the high-frequency electromagnetic induction principle, high-frequency induction current is used for enabling ferrite stainless steel pipes to generate vortex to generate heat rapidly, and water flowing through the stainless steel pipes is rapidly heated with high power; an induction heating assembly is an induction heating coil assembly formed by sealing and fixing induction coils as a whole through high temperature resisting silica gel, and the induction heating assembly is inserted in an annular clearance of an inner and outer pipe composite heating pipe, so that the outer wall of an inner pipe and the inner wall of an outer pipe receive a high-frequency induction magnetic field at the same time to generate vortex to generate heat rapidly; due to the fact that inner and outer induction heating is carried out at the same time through the induction coils, the heating speed is high, no heating power attenuation exists during long-time use, and the electrothermal conversion efficiency is high; due to the fact that three layers of stainless steel plates are arranged on the outer portions of the coils for shielding, electromagnetic radiation is effectively avoided; due to induction heating, electric insulation and isolation are higher, and the hidden danger of electric shocks is effectively avoided; and due to the action of induction heating high-frequency alternating current, water scale is avoided, and the service life of the water heater is prolonged greatly.

This invention relates to low cost anti-erudition mobile communication terminal, which comprises multiple beam antenna, multi-path signal selection switch, receive module, send module, wave beam manager module, base band process module and user irradiation alarm module, wherein, The antenna processes the wireless path hollow division address and the terminal estimates each beam received signal quality on down radio frame transmission interval to find out quality beam as receive wave beam; The user pre-set wave beam reversed to the human on the alarm module according to terminal direction; The terminal does not use the beam to receive and send to alarm user to change terminal direction till the beam sends and receives the signals.

The invention provides a THz waveguide type VO2 temperature control switch including a cylindrical hollow waveguide I having a periodical fluctuating structure, and a waveguide II composed of a VO2 thin film and a base, wherein the cylindrical hollow waveguide I having the periodical fluctuating structure, the VO2 thin film, and the base are successively arranged from the outside to the inside, and the periodical fluctuating structure is square. The THz waveguide type temperature control switch is less in loss, simple in structure, simple in performance tuning, and wide in control range, the control of whether the terahertz wave passes through the waveguide can be achieved through the attribute conversion from the insulation phase to the metal phase before and after the VO2 phase change temperature, so that the switching function can be achieved.

The invention discloses an electric automobile charging gun structure. The electric automobile charging gun structure comprises a fixed end and a movable end. The fixed end and the movable end respectively comprise a magnetizer and an induction coil and can be matched with each other. During charging, the movable end is inserted into the fixed end. Each induction coil is connected with a power converter of a corresponding charging circuit, wherein the power converter is connected with a charging controller, the charging controller is connected with a communication module, the charging controller is used for detecting the input/output voltage and the current of the power converter, receiving a data signal from the communication module, sending the processed data to the communication module and sending a control signal to the power converter. A charging gun is of an electric isolation structure, a metal electrical plugging piece does not exist, and therefore electric leakage, bad contact and other potential safety hazards cannot occur; the electric automobile charging gun structure has a good shielding effect, and electromagnetic radiation is effectively avoided.

The invention relates to an anti-electromagnetic radiation wallpaper which is characterized in that the wallpaper comprises, from bottom to top, a bottom layer (1), a first stickup layer (2), a wire mesh layer (3), a second stickup layer (4) and a surface layer (5), the bottom layer (1) is made from PVC-based paper, the first stickup layer (2) and the second stickup layer (4) are both made from a polyvinyl chloride coating, the wire mesh layer (3) is an iron gauze, a copper mesh or other synthetic wire meshes, a graphite particle is spread in apertures of the wire mesh, and the surface layer (5) is made from a knitted fabric. According to the invention, since the wire mesh layer capable of resisting electromagnetic radiation is arranged between the bottom layer and the surface layer through an adhesive, the wallpaper can effectively prevent electromagnetic radiation, so harm to health of people is avoided, mutual interference among an electromagnetic element, electromagnetic equipment and the like is avoided, and the service life of an electric appliance is prolonged.

The invention discloses a terrapin hatching and feeding house which comprises a house body and a transparent roof, wherein covering cloth which can be spread and collected at one end of the roof is arranged on the upper side of the roof, and heat absorption cloth which can be spread and collected at one end of the roof and is located in the house body is arranged on the lower side of the roof. According to the terrapin hatching and feeding house, the indoor temperature can rise, and excessive variation of the indoor temperature or invariable constant indoor temperature can be avoided, so that the indoor environment can follow the nature law and naturally changes, a young terrapin hatched and growing in the environment can have better environmental change adaptability in the later period due to the naturally rising temperature and humidity, and the heath degree is higher; and through sunlight irradiation, solar energy is absorbed for obtaining heat, so that the indoor temperature changes slowly, the process follows nature law and is not forced, electromagnetic radiation is avoided, and the injury to the young terrapin by electric leakage is prevented further.

The invention relates to the field of electronic communication equipment, in particular to a sealed shielded power network protection cabinet. The cabinet comprises a cabinet body, a cabinet door, a voltage stabilizer, a circuit breaker, a contactor, a transformer, a relay, a current Hall transformer, a switch power supply, a digital board, an analog board and a connecting terminal. A transition chamber is arranged outside the cabinet door; and a foaming plastic layer, a metal shielding layer and an elastic foam layer are arranged in the plates of the cabinet body, the cabinet door and the transition chamber respectively. The transition chamber and the cabinet body are connected integrally to encircle the cabinet door, and a sealed door is arranged on the transition chamber. The metal shielding layers added in the plates of the cabinet body and the cabinet door can effectively prevent electromagnetic radiation and electromagnetic leakage, obviously improve the positioning reliability, improve the production efficiency and ensure system safety and power supply quality safety; and the transition chamber can greatly improve the protective tightness.

The invention discloses a mailbox control system which comprises a secret key transmitting device and a mailbox control device. The secret key transmitting device is built in a mobile terminal and comprises a control unit and a light emitting diode. The control unit is used for converting obtained identifying data into upper rim triggering signals and lower rim triggering signals and driving the light emitting diode to emit an optical signal which represents the identifying data according to the upper rim triggering signals and the lower rim triggering signals. The mailbox control device is arranged on a mailbox and comprises an optical signal processing unit and a verifying unit. The optical signal processing unit is used for receiving the optical signal and converting the optical signal into binary data. The verifying unit is used for receiving the binary data and comparing the binary data with verifying data stored ahead. If the binary data are matched with the verifying data stored ahead, the mailbox control unit carries out unlocking. With the mailbox control system, the mobile terminal and the mailbox control device, electromagnetic pollution is avoided and a mutual unlocking rate of mailboxes is zero.

A pair-twisted double-guide carbon fiber heating cable mainly consists of a protective bushing and carbon fiber heating wires; the carbon fiber heating wires consist of a plurality of carbon fibers and insulation protecting layers; and carbon fiber heating wires are pair-twisted spirally inside the protective bushing. The pair-twisted double-guide carbon fiber heating cable has the excellent features of scientific and rational design structure, high-temperature resistance, ageing resistance, anti-interference, high efficiency, energy conservation and good thermal stability; because of no radiation, the pair-twisted double-guide carbon fiber heating cable does not need to be shielded and the production cost is saved greatly.

The invention relates to a wireless coverage antenna unit. The wireless coverage antenna unit comprises a substrate; an oscillator which is arranged on the substrate for radiating electromagnetic waves; and a director which is arranged on the substrate for making the beam width radiated by the antenna unit in a default frequency band is not less than 180 degrees according to the structure, the size and the distance between the antenna unit and the oscillator, and restraining the radiation intensity of the antenna unit in the coverage of another antenna unit having a same frequency. The antenna unit provided in the invention has the advantage of good directivity, narrow-beam wireless coverage can be realized in the default frequency band to avoid the electromagnetic radiation on regions which do not need to be covered, and the signal intensity in the coverage area can be realized.

The invention relates to the field of electric communication equipment, in particular to a shielded power grid protective cabinet. The cabinet comprises a cabinet body, a cabinet door, a voltage stabilizer, a breaker, a contactor, a transformer, a relay, a current Hall transformer, a switch power supply, a digiboard, an analog board and a wiring terminal, wherein the board structure of the cabinet body and the cabinet door is formed by a steel plate layer, a foaming plastic layer, a metal shielding layer, a flexible foam layer and an insulating shell layer successively from inside to outside, wherein an air conditioner is arranged on the top of the cabinet body, and an insulating earthing lead wire is arranged on the bottom of the cabinet body. The metal shielding layer is added between the cabinet body board and the cabinet door board, so that electromagnetic radiation and electromagnetic leakage can be effectively prevented, positioning reliability can be remarkably improved, production efficiency can be improved, and system safety and quality safety of power supply can be ensured.

The invention discloses a protective door of a Cobalt-60 accelerator. The protective door comprises a front plate (1), protective lead plates (2), a channel steel frame (3) and a fixed bolt (4) and is characterized in that the protective lead plates (2) is arranged at the inner side of the front plate (1); two layers of the protective lead plates (2) are supported by the channel steel frame (3) to form a cavity (5); and the fixing bolt (4) is fixedly connected with the channel steel frame (3) after sequentially passing through the front plate (1) and the protective lead plates (2). The protective door of the Cobalt-60 accelerator, disclosed by the invention, is formed by assembling the steel plate and the lead plates in a manner of forming the cavity between the lead plates; a radiation-proof filler is arranged inside the cavity as required, and protective lead blocks are arranged at the fixing bolt holes, so that the electromagnetic radiation, and X rays, Y rays and the like can be effectively prevented and the radiation-proof area can be increased to a maximum extent without dead corners left; and the protective door of the Cobalt-60 accelerator has the features of simple structure and low cost and is suitable for popularization and use.

The invention provides a high-temperature- and high-voltage-resistant high-insulating-property ignition cable, and aims to provide an electromagnetic shielding ignition cable which has strong adaptability to severe environment, small in electromagnetic leakage, high in medium insulation strength and low in transmission loss, can shield stray radiation of ignition energy, can reach high insulation of 20kV in direct current withstand voltage, and can achieve shielding effectiveness of above 50dB. The ignition cable is realized through the following technical scheme: a nickel-core conductor penetrates through an inner-layer insulator, a glass fiber which serves as one of the insulators wraps the nickel-core conductor, the insulator passes through a middle layer corrugated metal hose whose outer layer has a mesh sleeve woven and is wrapped between the nickel-core conductor and the corrugated metal hose, alumina powder is filled in an inner gap between an outer surface of the glass fiber that penetrates into an inner wall of the corrugated metal hose and an inner surface of the corrugated metal hose, and an outer layer shielding body has the metal stainless steel mesh sleeve woven. The high-temperature- and high-voltage-resistant high-insulating-property ignition cable overcomes the defects that a traditional ceramic insulator cable is poor in bending performance, high-altitude performance and anti-mechanical vibration capability and electromagnetic leakage cannot be avoided.