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39results about How to "Reduce external radiation" patented technology
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Wireless power supply method and device for high-voltage on-line monitoring equipment
ActiveCN106602745AEfficient aggregationReduce external radiationBatteries circuit arrangementsElectric powerEngineeringHigh pressure
The embodiment of the invention discloses a wireless power supply method and device for high-voltage on-line monitoring equipment. With the method and device, a problem of low power supply reliability of the wireless power supply method of the existing high-voltage on-line monitoring equipment and problems of a power supply distance, power and efficiency, power supply stability and reliability, and power supply cost can be solved. The method comprises: step one, an energy-taking coil takes energy out from a high-voltage bus in an electro-magnetic induction manner and AC / DC and DC / AC voltage conversion is carried out to convert 50-Hz alternating currents into high-frequency alternating currents; step two, a transmitting coil disperses the energy of the high-frequency alternating currents to the surrounding space and thus a high-frequency electromagnetic field is formed in the space, targeted transmission of the energy is carried out by using a domino relay coil, and a receiving terminal receives the energy; and step three, after the receiving terminal receives the energy, power conversion processing is carried out and then the converted power is provided for a storage battery and a load.
Owner:ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
Real-time medical communication system based on current coupling type human body communications and communication method thereof
InactiveCN103560837AFirmly connectedReduce power consumptionDiagnostic recording/measuringSensorsCapacitancePatch electrode
The invention discloses a real-time medical communication system based on current coupling type human body communications and a communication method of the real-time medical communication system, and belongs to the field of human body communications, wherein the problem that an existing whole system of capacity coupling type human body communications is poor in adaptation and stability is mainly solved. The real-time medical communication system comprises a power module, a transmitter and a receiver, wherein the transmitter and the receiver are respectively connected with the power module and installed on a human body. The communication method of the real-time medical communication system comprises the steps that a medical signal of the human body is converted into a differential current signal suitable for transmission of human tissues through the transmitter, the differential current signal is transmitted to a patch electrode through a guide line and is injected into the human tissues through the patch electrode, a voltage signal in the human tissues is collected and transmitted to the receiver, and the receiver detects voltage of two different positions on the human body so as to obtain the medical signal. Information is transmitted by safely and stably using the human body as a medium without affecting the normal physiological status of a person, and the real-time medical communication system based on the current coupling type human body communications and the communication method of the real-time medical communication system are suitable for being popularized and used on a large scale.
Owner:NEIJIANG NORMAL UNIV +1
Radar system for detecting small target on sea
InactiveCN108693527ARealize simultaneous measurementStrong clutter suppression abilityRadio wave reradiation/reflectionRadar systemsImage resolution
The invention discloses a radar system for detecting a small target on the sea, and relates to the field of radar equipment. The system comprises a frequency synthesizer, a transmitter, a receiver, asignal processor, a display control combination, an antenna, and a servo device. The objective of the invention lies in providing a navigation radar of a solid coherent system. The radar employs a powerful signal processing means for a large-time-width bandwidth product chirp signal, so the radar is long in detection distance, is high in distance resolution and is strong in clutter inhibition capability. The radar also employs a combined pulse form of wide, medium and narrow pulses in the same pulse repetition period for achieving the simultaneous measurement of a full-range target with a small detection distance blind area.
Owner:XIAN XIDE ELECTRONICS INFORMATION TECH
Vehicle control method, device and system and vehicle
InactiveCN106740566APrevent theftAvoid lostNon-mechanical controlsEngine controllersStopped workToxic gas
The invention provides a vehicle control method, device and system and a vehicle. According to the vehicle control method and device, firstly, a working state signal of an engine is firstly received, and whether the engine is in a working state or not is judged; if the engine is in the working state, a control signal for detecting the state of a vehicle door is transmitted; a state signal of the vehicle door is received, and whether the vehicle door is opened or not is judged; if the vehicle door is opened, a control signal for detecting the position of an electronic key is transmitted; a position detection result signal of the electronic key is received, and the distance between the electronic key and the vehicle is obtained; when the distance between the electronic key and the vehicle exceeds a preset distance, a control signal for controlling the engine to stop working is transmitted. Even when a driver forgets to shut down the vehicle when leaving the vehicle, the engine can automatically stop working after the driver is away from the vehicle, the threat of toxic gas such as carbon monoxide generated by running of the engine to health is avoided, and potential safety hazards are eliminated.
Owner:BEIJING BORGWARD AUTOMOBILE CO LTD
Dimming glass based on solar energy and dimming liquid crystal
InactiveCN102108757ASoft lightGood shading effectBatteries circuit arrangementsLight protection screensSurface layerSolar battery
The invention discloses dimming glass based on solar energy and dimming liquid crystal. The dimming glass is characterized by mainly comprising double transmitting glass surface layers (1), a liquid crystal sheet (4) and a film solar battery (3), wherein the inner surfaces of the double transmitting glass surface layers (1) are respectively bonded with an ethylene-vinyl acetate (EVA) adhesive layer (2); the film solar battery (3) with a frame structure is clamped between two EVA adhesive layers (2) and arranged along the peripheries of the transmitting glass surface layers (1); the liquid crystal sheet (4) is also clamped between the two EVA adhesive layers (2) and is positioned in the frame of the film solar battery (3); the film solar battery (3) is connected with the input end of a storage battery through a control circuit; the output end of the storage battery (6) is electrically connected with the liquid crystal sheet (4); and a dimming resistor (5) is connected in series in a connecting circuit of the storage battery (6) and the liquid crystal sheet (4). The dimming glass has the advantages of adjustable light, energy conservation, environmental friendliness, high strength and low cost.
Owner:JINLING INST OF TECH
Cooling device of implantable heart assisting blood pump
PendingCN108273148AReduce external radiationReduce the temperatureBlood pumpsMedical devicesVentricular assistanceBlood pump
The invention relates to medical instruments, in particular to a cooling device of an implantable heart assisting blood pump. The cooling device comprises a pump system and a driving system. The pumpsystem is provided with the blood pump and a pump case, and the driving system is provided with a stator and a rotor. The cooling device is characterized by further comprising heat directional conducting parts and vacuum heat insulating parts; the heat directional conducting parts are located on the periphery of the stator of the blood pump, and the vacuum heat insulating parts are located in thepump case of the blood pump. The heat directional conducting parts directionally conduct heat generated by the stator of the blood pump into blood. Outward radiation of the heat is reduced through thevacuum heat insulating parts, temperature rise of the surface of the blood pump is reduced, and heat damage to tissue is avoided. Meanwhile, as the specific heat capacity of the blood is very large and the heat dissipation function of the surface of the human body is very strong, the heat cannot cause increase the temperature of the blood. Vacuum is formed between the vacuum heat insulating layers, so that outward radiation of the heat is reduced. The problem of temperature rise of an implantable artificial heart-heart ventricle assisting system is effectively solved, and the temperature riseis completely within the human body physiological range after the implantable blood pump is implanted in the body.
Owner:CHANGZHI JIUAN ARTIFICIAL HEART TECH DEV
Bluetooth earphone, wearable equipment, control system and control method
ActiveCN110536203AAvoid discomfortEasy transferEarpiece/earphone attachmentsNear-field systems with structural receiverSignal qualityControl system
The invention provides a Bluetooth earphone, wearable equipment, a control system and a control method. The Bluetooth earphone is connected with a mobile terminal through Bluetooth. The Bluetooth earphone comprises an earphone shell; at least part of the receiving electrode is exposed out of the outer surface of the earphone shell so as to be in contact with a human body; the signal receiving module is arranged in the earphone shell, is connected with the receiving electrode and is used for receiving a control signal which is transmitted by external wearable equipment and is transmitted to thereceiving electrode through a human body; the earphone chip is arranged in the earphone shell and is connected with the signal receiving module; the signal receiving module transmits a received control signal to the earphone chip, and the earphone chip executes a corresponding instruction according to the control signal. The Bluetooth earphone is controlled by an external wearable equipment, is simple and convenient to operate, and has low requirements on signal quality.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD
Composite sheet synthesis block
ActiveCN111359537AQuality improvementAffect stabilityUltra-high pressure processesSuperhard materialPolycrystalline diamond
The invention provides a composite sheet synthesis block used for manufacturing superhard material sintered bodies like polycrystalline diamond composite sheets. The composite sheet synthesis block comprises: a pressure-transmission and heat-preservation body, which is equipped with a synthesis cavity; an isolation body which is arranged in the synthesis cavity and comprises an isolation pipe andtwo isolation sheets arranged at openings at two ends of the isolation pipe in a sealing mode, wherein a cavity used for accommodating a composite body is formed in the isolation body, and the outer surfaces of the isolation sheets are flush with the end surface of the isolation pipe; a first shielding pipe, a heating pipe and a second shielding pipe, which are sequentially arranged outside the isolation body; two groups of heat-resistant sheets, which are arranged at two ends of the isolation body respectively and make contact with the corresponding end surfaces of the isolation pipe, the first shielding pipe, the heating pipe and the second shielding pipe and the inner surface of the pressure-transmission and heat-preservation body respectively; and two groups of conductive structures, which are respectively arranged at the outer sides of two groups of heat-resistant sheets. The composite sheet synthesis block disclosed by the invention is uniform in heating; meanwhile, the yield ofthe manufactured composite sheets is high.
Owner:SANHE JINGRI DIAMOND COMPOSITE MATERIALS CO LTD
Fire-proof oven doors and fire-proof oven door frame walls of a coke oven battery
InactiveCN101883836AImprove heat resistanceSmall coefficient of thermal expansionCoke oven doors/closuresRadiation lossCoke oven
The invention relates to a heat-resistant door device for closing a horizontal coke chamber oven, said device being made of fire-proof material, wherein particularly a silica-containing material or a silica and aluminum oxide-containing material is used. The material has a low temperature expansion coefficient and has good heat insulating properties such that the door does not warp and does not become deformed during the coking process. The door device is configured by a door-surrounding coke oven wall located substantially above the door and a moveable door located beneath. Thus less cold ambient air enters the coke oven chamber during the coke discharge and the radiation loss is minimized. The door may comprise an ellipsoid convexity, with which the coal can be discharged more easily into the coking chamber. The oven wall surrounding the oven chamber may also be made of a fire-proof silica-containing or a fire-proof silica and aluminum oxide-containing material.
Owner:ТІССЕНКРУПП УДЕ ҐМБГ
Automatic sensing control type modularized sun-shading system
ActiveCN110005328AAutomatic control openAutomatic controller offClimate change adaptationLight protection screensAutomatic controlBusbar
The invention discloses an automatic sensing control type modularized sun-shading system. The automatic sensing control type modularized sun-shading system comprises a constant voltage source module,a sun-shading window module group, a switch module group, a processor module and a sensing module, and the busbar voltage end of the constant voltage source module provides a stable busbar voltage tothe sun-shading window module group, the sun-shading window module group comprises a plurality of sun-shading window modules, and each sun-shading window module comprises a curly static film and a conducting layer; the switch module group comprises a plurality of electronic switches corresponding to the sun-shading window modules one to one, each sun-shading window module and each electronic switch are connected in series into a first access road, and all the first access roads are connected in parallel; and the sensing module comprises one or more sensors, and the processor module controls the electronic switches to be closed or disconnected according to detection results of the sensors. According to the automatic sensing control type modularized sun-shading system, a sun-shading window is automatically controlled to be opened or closed by using the sensing modules, the sun-shading window is automatically unfolded under the condition of detecting the need for sun shading, the sun-shading window is automatically put away under the condition of detecting no need for sun shading, and energy consumption is saved.
Owner:苏州威尔阳光智能科技有限公司
Low peak-to-average ratio orthogonal pulse modulation method based on Legendre polynomial
InactiveCN110166396AImprove practicalityImprove anti-interference abilityMulti-frequency code systemsComplete dataTime domain
The invention discloses a low peak-to-average ratio orthogonal pulse modulation method based on a Legendre polynomial. The method comprises: orthogonal pulses used for modulating data adopting elliptic spherical wave function pulses with the same channel bandwidth, mutually aliasing frequency spectrums and orthogonal time domains; wherein the elliptic spherical wave function pulse is generated byadopting a Legendre polynomial weighted combination; discretizing the orthogonal pulses to form an orthogonal basis matrix; constructing a dimension reduction matrix of the orthogonal basis matrix, wherein the row number of the dimension reduction matrix is smaller than the column number; carrying out left multiplication operation on the orthogonal basis matrix and the dimension reduction matrix to realize dimension reduction processing; data information to be transmitted being subjected to serial-parallel conversion to form a multi-path parallel data group, the multi-path parallel data groupand the orthogonal basis matrix subjected to dimension reduction processing being subjected to left multiplication operation, completing data modulation, and forming a path of modulation signal through time domain signal superposition. According to the method, the practicability of the ellipsoidal wave function in the quadrature modulation technology is improved, and meanwhile, the peak-to-averageratio of multiple paths of quadrature modulation signals is inhibited.
Owner:SHANDONG CHUANGHUI TECH CO LTD
Geomagnetic measurement method based on split type suspended spherical coil
ActiveCN109471184ASimple structureImprove the uniformity of the magnetic fieldElectric/magnetic detectionAcoustic wave reradiationEngineeringTotal field
The invention discloses a geomagnetic measurement method based on a split type suspended spherical coil. The method comprises the steps that a measurement system is installed; under the situation thatpower is not supplied to a compensating spherical coil, a tester host measures a geomagnetic total field through the compensating spherical coil; under the situation that power is supplied to the compensating spherical coil, a measured value is recorded as the geomagnetic horizontal component when reaching the minimum; the tester host supplies power to a bias spherical coil, the bias spherical coil applies a bias magnetic field in the east-west direction, and a resultant magnetic field of the bias magnetic field and geomagnetic total field is calculated to obtain a relative magnetic declination; other geomagnetic parameters are calculated by using the geomagnetic total field, the geomagnetic horizontal component and the relative magnetic declination. The structure of the split type suspended spherical coil adopted by the geomagnetic measurement method is very simple, a magnetic field generated inside the coil is more uniform, a magnetic field outside the coil attenuates more quickly,the external radiation is small, and the sampling frequency can be effectively improved.
Owner:江苏省地震局
Steam heat recovery device
InactiveCN105125084AReduce external radiationRaise the water temperatureBeverage vesselsHeat conductingEngineering
A steam heat recovery device comprises a water-steam separator and a heater, wherein the heater is provided with a heater water outlet and a heater water inlet; the water-steam separator comprises an inlet and a hot water outlet and further comprises a lower cavity and an upper cavity; the inlet is formed in the lower cavity and connected with the heater water outlet; the upper cavity and the lower cavity are separated by a heat conducting sheet; the upper cavity is provided with a cold water inlet and a lower water gap communicated with the heater water inlet. The steam heat recovery device provided by the invention can effectively utilize heat at the top of the water-steam separator and effectively reduce heat radiation and is favorable in energy-saving property.
Owner:NINGBO CIXI ELECTRICAL APPLIANCE
Double-C structure SIW transmission line
ActiveCN108539344AThe technical problem of increasing outward radiationHigh cavity Q valueWaveguidesMicrowaveTransfer procedure
The invention relates to the technologies of microwave and transmission lines, and specifically relates to a double-C structure SIW transmission line. The transmission line has the high-Q, low-loss and low-leakage characteristics. According to the invention, all rows of metal cylinders of a conventional SIW transmission line are replaced by the upper and lower rows of sheet arc metal pieces whichare staggered, wherein all sheet arc metal pieces are the same, and the internal diameters of the arcs are D. The shortest distance D of the adjacent sheet arc metal pieces in a single row is d, the shortest distance between two ends of the arcs is f and the shortest distance between the staggered sheet arc metal pieces in the upper and lower rows is w, wherein 0<d<D, d<f, and 0<w<=d. According tothe invention, a double-C structure is employed for replacing a metal cylinder in a conventional SIW, and the technical problems that the OFF state of a traveling wave is not ideal, the Q value of aline cavity is reduced and the outward radiation of the electromagnetic waves is increased, which are caused by the leaking of the electromagnetic waves caused by two rows of metal cylinders of the conventional SIW structure, in the transmission process are solved under the condition that a no-TM mode is guaranteed.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Magnetic latching Internet of Things (IoT) switch with touch feeling
InactiveCN108550488AImprove experienceReduce volumeEfficient power electronics conversionDc-dc conversionElectricityAutomatic control
The invention discloses a magnetic latching Internet of Things (IoT) switch with touch feeling. The switch comprises a fixing support, a key, a panel frame, a rear cover plate and a lead terminal embedded into the surface of the fixing support, and a magnetic control device and a touch control device installed in the fixing support. The magnetic control device is used for achieving automatic electrical control, and the touch control device is used for achieving manual operation. According to the switch provided by the invention, electric energy is acquired by the way of getting electricity viaa single wire, so that the modification and upgrade of the existing switch are facilitated. The touch control device of the switch provided by the invention can feel the action of the key during a manual operation process, and has the function of being capable of experiencing feedback touch feeling of the operation. A communication circuit is arranged in the switch, so that the switch can be connected with the Internet to be remotely controlled, and the switch is relatively high in communication reliability. The switch also has the function of being low in power consumption when in a standbystate; particularly the iron core drive circuit can achieve the effect of zero power consumption when in the standby state.
Owner:山东知和物联科技有限公司
Stacked shielded inductor
InactiveCN112400210ACoupling interference voltage is smallEasy to GrindTransformers/inductances coils/windings/connectionsUnwanted magnetic/electric effect reduction/preventionElectrical conductorElectrical connection
A stacked shielded inductor, comprising a stacked body, an internal wire coil, a first external electrode, a second external electrode, a third external electrode, and a shielding cover. The stacked body comprises a plurality of insulating body layers arranged in a stacked manner, and shielding conductor channels positioned on the periphery of the internal wire coil is opened in the plurality of insulating body layers. Each shielding conductor channel is internally provided with a shielding conductor, and the channels are electrically connected to one another, together forming a shielding conductor stacking layers surrounding the outside of the internal wire coil. A shielding conductor upper layer and a shielding conductor lower layer are respectively arranged above and below the internalwire coil, the shielding conductor stacking layers, the shielding conductor upper layer, and the shielding conductor lower layer closing to form a shielding cover that encloses the internal wire coil,the shielding cover being connected to the third external electrode arranged on a surface of the stacked body. Thus, the present invention is able to achieve a high screening effect for a stacked surface-mounted inductor, effectively reducing outward radiation from the stacked surface-mounted inductor, and thereby improving the reliability of a circuit system.
Owner:SHENZHEN SUNLORD ELECTRONICS
Online monitoring device power supply system based on high-voltage transmission line jumper wire energy acquisition
PendingCN107086612AReduce external radiationImprove transmission efficiencyCircuit arrangementsElectrical batteryResonator
The embodiment of the invention discloses an online monitoring device power supply system based on high-voltage transmission line jumper wire energy acquisition. The system is used for solving a technical problem that a method in the prior art for supplying power to an online monitoring device on a high-voltage transmission line is unreliable in power supply and susceptible to random factors such as weather and the like. The system comprises a CT energy acquisition coil, a power converter, a transmitting coil resonator, a receiving coil resonator, a rectifier, a rechargeable battery and an online monitoring device. The CT energy acquisition coil sleeves the transmission line, and is connected with the power converter and the transmitting coil resonator successively. The transmitting coil resonator is horizontally and fixedly arranged above a jumper wire sleeve of the transmission line. The receiving coil resonator is inductively connected with the transmitting coil resonator, is used for receiving the high-frequency energy transmitted by the transmitting coil resonator to an air medium, and is connected with the rectifier, the rechargeable battery, and the online monitoring device successively.
Owner:ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
Connector of telephone
ActiveCN102496820AReduce electromagnetic signal radiation leakageReduce Radiation LeakageCoupling for high frequencyTelephone set constructionsShielded cableElectricity
The invention discloses a connector of a telephone, which belongs to the electronic field and comprises a socket, a plug, a metal casing cover, a printed circuit board (PCB) and a tail cover. A patch three-terminal electromagnetic interference (EMI) filter is arranged on the PCB and used for filtering signals of the telephone. The socket is arranged in the metal casing cover and detachably connected with a telephone casing. The tail cover is connected with the plug, and an electric conduction contact face of the tail cover is detachably and electrically connected with the telephone casing. The tail cover leads a shielding layer of a handle shielded cable and the socket to form electrical connection and to be grounded through the telephone casing. When the plug is inserted into the socket,the plug and the socket are totally wrapped by the tail cover, the PCB and the metal casing cover. By arranging the patch three-terminal EMI filter, electromagnetic signal radiation leakage of the telephone is reduced, and the detachable metal casing cover and the detachable tail cover facilitate installation and maintenance.
Owner:太原斯利德电子技术有限公司
Frequency locking method of plasma power
The invention provides a frequency locking method of plasma power. The frequency locking method includes the following steps: (A1) detecting peak voltage or peak current of a plasma coil, (A2) adjusting frequency of a signal source according to the peak voltage or the peak current, and (A3) outputting adjusted radio frequency power through fixed matching. The frequency locking method of the plasma power has the advantages of being high in efficiency, very little in outward radiation, good in work stability, high in reliability, capable of continuously adjusting the output frequency and zero reflection power and the like.
Owner:FOCUSED PHOTONICS
Armored data cable for desert and preparation method thereof
PendingCN112133479AImprove the protective effectReduce internal interferenceInsulated cablesCable/conductor manufactureStructural engineeringAtmospheric sciences
The invention discloses an armored data cable for desert and a preparation method thereof, and relates to the technical field of data transmission cables. The armored data cable for the desert comprises a sheath structure and a cable core, wherein the sheath structure is cylindrical, and the interior of the sheath structure is provided with a hollow cavity; the sheath structure includes a first sheath layer, a steel tape armor, a second sheath layer, an aluminum tape armor and a third sheath layer; the steel tape armor is arranged on the inner side of the first sheath layer; the second sheathlayer is arranged on the inner side of the steel tape armor; the aluminum tape armor is arranged on the inner side of the second sheath layer; the third sheath layer is arranged on the inner side of the aluminum tape armor; and the cable core is arranged in the cavity. According to the invention, the two layers of armors are arranged in the sheath structure, so that the protection strength of thecable core is enhanced, and the risk of data transmission interruption caused by rat damage is reduced. Meanwhile, the three sheath layers are arranged inside and outside the two armors, and the sheath layers are made of insulating materials with low dielectric constants, so that the external radiation of the steel tape armors and the aluminum tape armors and the internal interference to the cablecore can be reduced.
Owner:ZHANGJIAGANG TWENTSCHE CABLE
Composite sheet synthetic block
ActiveCN111359537BQuality improvementAffect stabilityUltra-high pressure processesSuperhard materialIsolator
The invention provides a composite sheet composite block for making superhard material sintered bodies such as polycrystalline diamond composite sheets. The composite sheet synthesis block includes a pressure transmission and heat preservation body with a synthesis cavity, and an isolation body arranged in the synthesis cavity, wherein the isolation body includes an isolation tube and two isolation sheets closed at the openings at both ends of the isolation tube, thereby forming an insulating body inside the isolation body. A chamber for accommodating a complex, the outer surface of the spacer is flush with the end face of the isolation tube, and the first shielding tube, the heating tube and the second shielding tube are arranged in sequence outside the isolation body, and are respectively arranged on both sides of the isolation body Two sets of heat-resistant sheets at the end, the two sets of heat-resistant sheets are in contact with the corresponding end faces of the isolation tube, the first shielding tube, the heating tube, the second shielding tube, and the inner surface of the pressure transmission heat preservation body; Two sets of conductive structures on the outside of the chip. The composite sheet synthesis block of the invention is heated evenly, and the manufactured composite sheet has a high yield.
Owner:SANHE JINGRI DIAMOND COMPOSITE MATERIALS CO LTD
Real-time medical communication system based on current coupling type human body communications and communication method thereof
InactiveCN103560837BFirmly connectedReduce power consumptionDiagnostic recording/measuringSensorsCapacitancePatch electrode
Owner:NEIJIANG NORMAL UNIV +1
A Geomagnetic Measurement Method Based on Split Suspension Spherical Coil
ActiveCN109471184BSimple structureImprove the uniformity of the magnetic fieldElectric/magnetic detectionAcoustic wave reradiationMagnetic measurementsTester device
The invention discloses a geomagnetic measurement method based on a split type suspended spherical coil. The method comprises the steps that a measurement system is installed; under the situation thatpower is not supplied to a compensating spherical coil, a tester host measures a geomagnetic total field through the compensating spherical coil; under the situation that power is supplied to the compensating spherical coil, a measured value is recorded as the geomagnetic horizontal component when reaching the minimum; the tester host supplies power to a bias spherical coil, the bias spherical coil applies a bias magnetic field in the east-west direction, and a resultant magnetic field of the bias magnetic field and geomagnetic total field is calculated to obtain a relative magnetic declination; other geomagnetic parameters are calculated by using the geomagnetic total field, the geomagnetic horizontal component and the relative magnetic declination. The structure of the split type suspended spherical coil adopted by the geomagnetic measurement method is very simple, a magnetic field generated inside the coil is more uniform, a magnetic field outside the coil attenuates more quickly,the external radiation is small, and the sampling frequency can be effectively improved.
Owner:江苏省地震局
An EMC Design Method for UAV Steering Gear Control Drive System
ActiveCN111152933BReduce electromagnetic radiation interferenceReduce radiation interferenceWith power amplificationGround installationsInterference resistanceUncrewed vehicle
Owner:洛阳安怀达智能科技有限公司
A kind of power cable with drying layer
ActiveCN104332229BDouble protectionPrevent intrusionClimate change adaptationPower cables with screens/conductive layersPower cableDesiccant
The invention provides a power cable with a metal mesh structure. The power cable comprises a cable shell and a cable core. The power cable also comprises the metal mesh structure which is arranged at the internal surface of the cable shell. The metal mesh structure comprises a flexible substrate and a metal mesh which is arranged at the surface of the flexible substrate. The metal mesh is composed of a first metal mesh line and a second metal mesh line which are intersected with each other, and the first metal mesh line and the second metal mesh line are made of conductive material. One side provided with the metal mesh structure orients towards the cable shell. According to the power cable with the metal mesh structure, the metal mesh is applied to be adhered on the flexible substrate, and one side provided with the metal mesh orients towards the outside so as to be well insulated from the cable core and great in inflexibility, and relatively disordered metal wires do not occur in cutting. Besides, metal material enhancing rigidity and adhesive force of the metal mesh structure is additionally arranged in metal material so that stability of the metal mesh structure is enhanced.
Owner:STATE GRID CORP OF CHINA +2
Staggered fully-shielded wire, transformer based on staggered fully-shielded wire and staggered fully-shielded wire based on multi-phase current
PendingCN113257536AEasy to manufactureReduce the size of the external radiationTransformers/inductances coils/windings/connectionsUnwanted magnetic/electric effect reduction/preventionPhase currentsTransformer
The invention discloses a staggered fully-shielded wire which is low in cost, suitable for large-scale mass production, large in current and high in frequency, and comprises a plurality of wire layers arranged in an up-and-down superposition mode. Each wire layer is provided with a plurality of input wires and output wires, and the input wires and the output wires on each layer are arranged at intervals. In two adjacent wire layers, the overlap ratio of each input wire at the upper layer and the nearest input wire at the corresponding same position on the lower layer is 0-100%; and in two adjacent wire layers, the overlap ratio of each output wire at the upper layer and the nearest output wire at the corresponding same position on the lower layer is 0-100%. The invention further discloses a transformer on the basis. The invention further discloses a staggered fully-shielded wire based on the multi-phase current, the staggered fully-shielded wire comprises a plurality of wire layers which are arranged in an up-down stacked mode, a plurality of corresponding wire groups are arranged on each wire layer in parallel, each wire group comprises single-phase wires which are arranged in parallel, and the number of the single-phase wires is the same as the number of phases. And the single-phase wires in the two adjacent layers of wire groups are arranged in a staggered manner.
Owner:龙腾
Resonator of microelectronic mechanical system and its production method
The resonator thereof comprises a substrate, a resonance structure, an anchorage device for securing the resonance structure, an electrode and an output electrode. The resonance structure is secured in the substrate using the anchorage device; the input electrode is connected to the resonance structure using a variable parallel plate capacitor; the output electrode is connected to the resonance structure using a variable parallel plate capacitor. The substrate and the resonance structure are made of one kind of material from silicon, germanium, carbide and piezoelectric ceramic. The resonator can be integrated with one kind of component from micro-electronic chip, bipolar transistor, MOS component, CMOS component, MOSFET, JFET and IGFET.
Owner:阎济泽
Radio terminal performance test device and method
ActiveCN100546402CEnsure personal safetyGood repeatabilitySubstation equipmentRadio/inductive link selection arrangementsEngineeringTest fixture
This invention discloses a performance test device and a method for radio terminal, in which, the device includes: a shield box with at least one antenna connected with an analog base station / controller out of the shield box, a test instrument connected with the being tested terminal in the box to test its radio performance, which controls the signal strength emitted to the radio terminal by the analog base station / controller, so that emitted signals can be controlled artificially, besides, tested terminals can work under single or multiple nets since one or many antennas are set in the box and shields radiation to outside test equipment and personnel and shields influence to being tested terminal from outside radiation interference of outside magnetic environment to guarantee accuracy of test result.
Owner:HUAWEI TECH CO LTD
A wireless power supply method and device for high-voltage online monitoring equipment
ActiveCN106602745BEfficient aggregationReduce external radiationBatteries circuit arrangementsElectric powerEngineeringElectromagnetic field
Owner:ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
A kind of pmma board that blocks infrared energy and saves energy and preparation method thereof
The invention relates to the technical field of PMMA plates, and provides a PMMA plate for blocking infrared energy and saving energy. In parts by weight, the raw materials at least include: 80-120 parts of MMA, 0.5-15 parts of infrared blocking agent, 0.1-0.5 parts of initiator, 0.05-0.3 part of chain transfer agent, 0.1-1 part of release agent, 0.05-0.3 part of devolatizing agent. The invention also provides a preparation method of the PMMA board which blocks infrared energy and saves energy.
Owner:ZHEJIANG LONGYOU ZHANYU ACRYLIC
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