104 results about "Inductive effect" patented technology

The invention provides a friction generator. The friction generator comprises two electrodes; the electrode comprises a macromolecular polymer insulating layer; a micro-nano concave-convex structure is arranged on one side surface of the macromolecular polymer insulating layer, and a metal film is arranged on the other side surface; the surface of the electrode micro-nano concave-convex structure of one insulating layer is directly attached to the surface of the electrode micro-nano concave-convex structure of the other insulating layer, and the two are fixedly connected through the outer edge; and the metal film is an electrode for outputting voltage and current of the friction generator. The invention provides a novel and effective method for obtaining energy by use of the friction effect. The friction generator generates electric energy by use of the potential change of the internal electrification by friction and the inductive effect of the metal pole plates on the two sides; and the method is simple and efficient and the cost is low.

An electro-magnetic survey method for surveying an area previously identified as potentially containing a subsea hydrocarbon reservoir, comprising obtaining first and second survey data sets with an electromagnetic source aligned end-on and broadside relative to the same or different receivers. The invention also relates to planning a survey using this method, and to analysis of survey data taken in combination allow the galvanic contribution to the signals collected at the receiver to be contrasted with the inductive effects, and the effects of signal attenuation, which are highly dependent on local properties of the rock formation, overlying water and air at the survey area. This is very important to the success of using electromagnetic surveying for identifying hydrocarbon reserves and distinguishing them from other classes of structure.

The invention relates to an active equalization system of a lithium-ion power battery. The active equalization system comprises a battery module B formed by connecting a plurality of single batteries in series, a primary coil L of a transformer T is connected with the anode and cathode of the battery module B via a master switch S, each secondary coil of the transformer T is respectively connected to the anode and cathode of each single battery via each sub switch, the master switch S is bridged between the signal input terminal of the main control chip MCU and the earth terminal, a sampling processing circuit is connected between the signal input terminal of the main control chip MCU and the master switch S. The invention also discloses an equalization method for the active equalization system of the lithium-ion power battery. In the invention, the process of mutually charging and discharging by converting electric energy to magnetic energy and then to electric energy is completed by using inductive effect, thus realizing the function of equalizing the upper limit or lower limit of the electric quantity of the single batteries, prolonging the service life of the storage batteries, needing no cooling system and having simple structure.

Provided is a measuring method using a spark coefficient for correcting low-amplitude value impact resistance of a tower grounding device. A portable impulse current generator is used as a signal output source, a three-level measuring mode is adopted to arrange the grounding device, an UPS is used for supplying power to inject impulse currents from a grounding electrode, a spark coefficient alpha of soil where the grounding device located is calculated, and initial impulse grounding resistance Rc obtained through convolution calculation is corrected according to the spark coefficient alpha obtained through calculation. According to the measuring method using the spark coefficient for correcting the low-amplitude value impact resistance of the tower grounding device, standard impulse grounding resistance under lightning currents is obtained by adopting the convolution calculation and a spark coefficient modification method, the inductive effect of the grounding device and spark discharge of the soil can be taken into consideration effectively, the corrected impulse grounding resistance is more similar to practical situations when electric transmission lines are struck by lightning. The measuring method using the spark coefficient for correcting the low-amplitude value impact resistance of the tower grounding device solves the problems that only power frequency grounding resistance can be adopted to carry out approximate estimation and field measurement cannot be carried out in the prior art are solved.

The invention discloses a portable lightning current generating device and method for grounding device impact impedance testing. The device comprises a power generator and a lightning current generator main loop test box. A rectifying silicon stack D, a charging resistor R1 and a direct-current voltage divider are connected in series to the output end of a boosting transformer T2. An energy-storage capacitor C is connected in parallel to the direct-current voltage divider. One end of a discharging switch S is connected with a positive electrode of the energy-storage capacitor C. The other end of the discharging switch S is connected with an adjustable wave modulated resistor R2. The other end of the adjustable wave modulated resistor R2 is connected with one end of an adjustable wave modulated inductor L. The other end of the adjustable wave modulated inductor L is connected with a grounding grid to be tested through a grounding testing current injection point. A grounding testing reverse current electrode and a reference voltage electrode are arranged on the periphery of the grounding grid to be tested. The ground testing reverse current electrode is connected to a negative electrode of the energy-storage capacitor C of a lightning current generator main loop. The device can simulate inductive effect and soil spark discharging effect really, and impact grounding resistance can be tested really.

The invention discloses a reverse F-type power amplifier and an emitter as well as a processing method. The main contents are that the reverse F-type power amplifier comprises a power amplifying part, and a harmonic wave control circuit comprising a third harmonic wave short-circuit circuit and a second harmonic wave open-circuit circuit; after being amplified by the power amplifier, the input radio frequency signal is input to the harmonic wave control circuit through the input end of the harmonic wave control circuit; in the harmonic control circuit, the input radio frequency signal passes by the third harmonic wave short-circuit circuit and the second open-circuit circuit in sequence, and is output by the output end of the harmonic wave control circuit; and the linear effect of an impedance micro-strip on the radio frequency is reduced, the non-linear feature of the power amplifier is effectively corrected, the effect on VBW (Video Band Width) of the power amplifier caused by the inductive effect of the impedance micro-strip in the prior art is effectively reduced, and the linear effect of the radio frequency signal amplified by the power amplifier is improved.

A radio antenna arrangement disposed in the conductive surface of a vehicle consisting of a substantially rectangular aperture having aperture length L and width B, wherein said aperture length L is sufficiently small so that the self-resonant frequency of the aperture is greater than the center frequency of the operating frequency range. There is a capacitive tuning element disposed in the aperture for tuning the aperture to a resonant frequency to approximately the center frequency of the operating frequency range. The capacitive tuning element serves as capacitive connection between the edges of the aperture, and is formed as a low-inductance element, so that due to the residual inductive effect, the remaining magnetic reactive power is as small as possible relative to the magnetically generated reactive power from the magnetic fields in the aperture. An input coupling element is also disposed in the aperture for coupling the antenna connection point to the resonance like high electromagnetic fields.

A stator coil heating apparatus and a stator coil heating method that are capable of effectively preventing a core from thermal deformation particularly caused due to a magnetic flux generated by a coil head, without the problem of heating temperature variation, and also shortening a time for the process of heating a stator coil, are provided.

A stator coil heating apparatus A to heat a stator coil L wound around a circular core F, comprises: induction heating coil heads 1 and 11 that heat the circular coil L by generating an inductive effect acting from outside in the thickness direction of the core F, against circular winding coil bases La and Lb that are sticking out of end faces Fa and Fb of the core F in the thickness direction thereof; and shields 2 and 12 that block a magnetic flux generated by the coil heads 1 and 11, out of the end faces Fa and Fb of the core F in the thickness direction thereof.

The invention discloses a millimeter-wave air slot differential integrated antenna. The millimeter-wave air slot differential integrated antenna comprises five parts, namely, a differential feeding network, a radiation module, a directed radiation module, a bond wire compensation network and a back cavity air slot; each of the radiation module and the directed radiation module is composed of an even number of radiating patch units which are in bilateral symmetry; signals are divided and transmitted to each radiating patch unit through a differential line and a one-to-many T-shaped structure; the back surface ground part of the antenna is partially etched; an air cavity is formed in a base, so that the bandwidth of the antenna can be extended; the antenna is connected with a chip through bond wires; in order to compensate the inductive effect of the bond wires, a capacitive patch is arranged between the bond wires, so that an L(inductor)-C(capacitor)-L(inductor) network can be formed, and therefore, interconnection loss of the antenna and the chip can be reduced; and in order to extend the bandwidth of the antenna, parasitic patches are arranged beside the radiating patch units. According to the millimeter-wave air slot differential integrated antenna of the invention, a dielectric material of which the height is consistent with the height of the chip is adopted to design the antenna, and therefore, the sticking, bonding and packaging of the antenna and the chip can be benefitted.

The invention relates to a metal complex of the ouercetin and the glucoside compounds provided with cell apoptosis inducing effect, and the application of the complex in preparing tumor treatment medicine. As reported by experiments, the ouercetin metal complex can inhibit the proliferation of tumor cells, but the uncertainty of the action mechanism restricts the development of the ouercetin metal complex as anticarcinogen medicine. The metal complex of the ouercetin and the glucoside compounds provided with a cell apoptosis inducing effect finds that the metal complex of the ouercetin and the glucoside compounds can induce apoptosis of the tumor cells and can be applied in tumor treatment medicine as a cell apoptosis revulsive.

A low-profile inductor includes

• • two flat substrates each flat substrate having opposing inner surface and outer surface, a set of metal wire conductors radially arranged in the inner surface, a connection contact located on each end of each metal wire conductor and a circuit layout arranged in the outer surface, a solder material set in between the flat substrates to electrically connect the connection contacts and the metal wire conductors of the flat substrates into two series, and a metal core bonded to the inner surface of each flat substrate with an adhesive and set between the metal wire conductors of the two flat substrates such that an induction zone is defined between the two flat substrates corresponding to the metal wire conductors to provide a continuous winding type metal magnetic coil inductive effect, enhancing rectifying and filtering performance.

The invention discloses a dual-band circularly-polarized co-aperture microstrip antenna small in size and good in integrity. The dual-band circularly-polarized co-aperture microstrip antenna comprise a K-band square ring patch antenna and a Ka-band square ring patch antenna and is miniaturized; the two antennas of different frequencies are disposed in the same plane by coplanar nesting, thus sectional height of the antenna is decreased and the size of the antenna is reduced; additionally, by the use of a K-band coupler patch and the use of two-point feedback manner, the axial ratio performance of the K-band antenna is improved, and the axial ratio width is widened; a shield cavity composed of an array of metal through holes is arranged around metalized through holes, thus the metalized through holes and the shield cavity form a coaxial structure, inductive effect caused by the metalized through holes is eliminated and other possible radiations are shielded; therefore, overall performance of the antenna is guaranteed. The antenna is suitable for popularization and application in the technical field of antennas.

The invention discloses a black low-flow-mark polyester molding compound which is prepared from mixed materials of, by weight: 65-80% of resin paste and 20-35% of alkali-free short chopped fiberglass. The resin paste is composed of raw materials of, by weight: 50-70 parts of unsaturated polyester resin, 30-50 parts of a black polyvinyl acetate solution, 1-1.5 parts of a curing agent, 2-4 parts of a mold release agent, 150-200 parts of a filling material, and 0.8-1.2 parts of a thickening agent. According to the invention, a low-shrinkage agent solution is prepared from polyvinyl acetate with a black body, such a shrinkage is lower than 0.05%. More importantly, the color of the molding compound is realized by the black color of polyvinyl acetate rather than by adding a black pigment. Therefore, non-uniform color due to pigment agglomeration caused by phase separation is avoided. Also, no black pigment is adopted in the formula, such that an inductive effect of a black pigment upon the curing agent is avoided, and the polyester molding compound provided by the invention has a longer storage life than other black polyester molding compounds.

The invention relates to a macrocyclic polyamine [12]aneN3 compound based on TPA-BI, and a preparation method and an application thereof. The compound disclosed by the invention is mainly prepared andsynthesized by means of Suzuki coupling, esterification reaction and Click reaction. The compound provided by the invention has the advantages of great Stock displacement and two-photon fluorescenceproperty as well as long wave excitation, low self-Illumination and high 3D resolution. The compound has an aggregation-inductive effect (AIE). The compound provided by the invention can form a pH stimulation responding cationic liposome with dioleoyl phosphatidylethanolamine (DOPE) to promote release of DNA in cells. The cationic liposome can enter cell nucleus efficiently so as to improve the transfection efficiency of the cells.

The invention discloses a method for obtaining the impulse impedance of a grounding device through low lightning current impulse test, comprising the steps as follows: (1) using a low-current lightning impulse current generator to carry out impulse test of a grounding device, measuring the grounding resistance of the grounding device when the output current peak is 1KA and the lightning impulse waveform is 8/20muS, and taking the grounding resistance as the power-frequency grounding resistance R3 containing an inductive effect; (2) acquiring the spark correction coefficient K1; and (3) calculating the impulse impedance R1 of the grounding device based on the formula R1=K1*R3. According to the invention, an impulse coefficient is decomposed into a spark effect correction coefficient and an inductive effect correction coefficient through spark effect and inductive effect decoupling, the spark effect correction coefficient is obtained by related standard querying or field testing, the inductive effect correction coefficient is obtained by field low lightning current impulse test, and therefore, the impulse impedance of the grounding device under the action of actual high lightning current impulse is obtained.

The invention discloses a wireless earphone using a short-tail helical antenna and a short-circuited L-shaped radiator. The wireless earphone comprises a circuit board, a battery, a loudspeaker, a housing, a switch button and an antenna system. The antenna system comprises the short-tail helical antenna and the short-circuited L-shaped radiator. The short-circuited L-shaped radiator is an L-shaped structure. An input point is arranged on a circuit board. The short-tail helical antenna is connected with the input point in a spiral structure and the short-circuited L-shaped radiator is also connected with the input point. The input point is connected with a wireless module through a transmission line. The wireless earphone is provided with the short-tail helical antenna and the short-circuited L-shaped radiator in an orthogonal structure so that a diversity effect can be formed and can reduce the number of zero points of the antenna to greatly enhance the antenna receiving capability of the wireless earphone. In addition, the inductive effect of the short-circuited L-shaped radiator and the capacitive effect of the short-tail helical antenna form a resonant structure to increase the bandwidth of the antenna system, thereby improving the signal receiving performance and the acoustic effect of the earphone.

The invention discloses an extra-thick hydrogen-free diamond-like film and a preparation method thereof. The upper portion of a metal substrate is coated with a Cr adhesive layer, a C/C multilayer composite film is arranged on the upper portion of the Cr adhesive layer, and soft C films and hard C films are alternately deposited to form the C/C multilayer composite film. The preparation method includes the steps: (1) workpiece pretreatment; (2) ion cleaning; (3) Cr adhesive layer preparation; (4) C/C multilayer composite film preparation. The soft and hard alternate C/C multilayer film is prepared by controlling substrate bias voltage through a vacuum ion plating technology, all layer interfaces are matched with each other, the film has good binding force and tenacity, SP2 bonds in the film are transformed into SP3 bonds by inductive effects generated by ion bombardment under high bias voltage, and the abrasion resistance of the diamond-like film is enhanced. According to a homogeneousmultilayer structure, the hardness of the film reaches up to 40GPa, friction coefficient is lower than 0.15, and the film has good durability, so that the engineered application range of the diamond-like film is widened.

The invention relates to the technical field of geophysical exploration, in particular to a method for rectifying a mine transient electromagnetic inductive effect by utilizing an emission current. The method is used for rectifying the inductive effect which is brought by a plurality of turns of small wire frames to data collection, wherein the small wire frames are used by mine transient electromagnetism, and the effect brought by the inductive effect in the process of processing the transient electromagnetism of an existing mine is eliminated. The method comprises a first step of starting, a second step of calculating single-turn return wire self-inductance and double-turn return wire mutual inductance, a third step of calculating inductance of n turns of return wires, a fourth step of calculating inductance voltage, changed as time goes, of the n turns of the return wires, a fifth step of selecting a time range needing to be rectified, a sixth step of subtracting corresponding inductance voltage in measured data within the selected range to obtain induced electromotive force of the rectified mine transient electromagnetism, and a seventh step of finishing.