51results about How to "Meet protective" patented technology

The invention discloses a time-setting clock system of a merging unit for realizing clock switching. A master clock and a slave clock are connected with the merging unit by a switch respectively; all electronic transducers are synchronized by sampling pulses and then upload sampling values to the merging unit; and the merging unit merges the data of the transducers of each phase and transmits themerged data to a protection, measurement and control unit device. The time-setting clock system is characterized in that: the merging unit comprises a merging unit central processing unit (CPU) and afield programmable gate array (FPGA) module connected with the merging unit CPU, wherein the FPGA module is connected with a time-keeping crystal oscillator. The invention provides an IEC61588-based synchronization method for the merging unit, provides switching methods for the merging unit under the condition of two master clock sources, endows the merging unit with the synchronization accuracy of a submicrosecond level, and ensures the seamless switching of the merging unit in a clock switching process.

The invention relates to a high-efficient zinc-rich anti-corrosive paint and a preparation method thereof. Components of the paint according to parts by weight are as below: 2.0-2.6 parts of ethylene resin, 75.0-86.0 parts of zinc powder, 11.0-24.0 parts of solvent and 0.1-0.5 part of addition agent. The invention is characterized in that the ordinary active zinc powder is used; zinc content in a dried film is greater than 96.5 percent so as to solve a present technical problem that only the use of high-purity zinc powder can lead to the zinc content of 96 percent in the dried film. A high-efficient zinc-rich anti-corrosive paint coating has excellent physical and mechanical performance and excellent anti-corrosive performance, and no red rust is generated during a 6000h neutral salt spray test. The surface of the coating can be used together with anti-corrosive finish paint of various types, and the requirement of various long-term heavy anti-corrosion constructions can be satisfied; the paint system is of single component which can be used at the temperature of -25 DEG C-80 DEG C; the construction is convenient, and the range of use environment temperature is wide; and the invention has good antistatic performance and can be used for an antistatic coating.

The invention discloses a preparation method of copper chloride hydroxide. The method comprises the following steps: adding copper hydroxide slurry in copper chloride solution according to a ratio of 2.5-3.5:1, reacting under the condition that the temperature is 80-160 DEG C, the pH value is 4-9 and the pressure is 0-600kPa, obtaining the reaction product after the reaction; and rinsing, centrifuging and drying the reaction product to obtain copper chloride hydroxide. The method of the invention has simple and safe operation, less waste discharge, lower production cost, more complete resource utilization and less environmental pollution.

The invention relates to a combined type sensor, which belongs to the field of electric power measurements. The combined type sensor comprises a shell, and is characterized in that a V/I/v voltage sampling loop and an I/i current sampling loop are arranged on a measured high-voltage load conducting wire in the shell, and an output end of the V/I/v voltage sampling loop and an output end of the I/icurrent sampling loop are connected with a current interface and a voltage interface of an output interface of the shell respectively. The combined type sensor can acquire supplied weak current signals, supplies the signals to a measuring instrument of milliampere or microampere standard current signals and millivolts or microvolt standard voltage signals to perform measurement, can acquire the signals accurately, reduce the consumption, save the cost and prevent electric larceny, is save and stable, and is suitable for measuring the electric quantity of a high-voltage side.

The invention discloses a microorganic aerobic composting method of kitchen garbage. The microorganic aerobic composting method comprises the following steps: water is used for cleaning kitchen waste so as to obtain an oil-water mixture and solid garbage; wood chips and alicyclobacillus are added into the solid garbage, and then aerobic composting is carried out so as to obtain a composting product. According to the invention, reducing, harmless and resourceful treatment to kitchen waste is carried out by adopting a microbic aerobic composting way. According to the invention, oil-water separation and reverse osmosis water treatment methods are adopted for treating kitchen waste, so as to reduce oil components in the kitchen waste and improve the composting effect, and the water resource reutilization is achieved. In the aerobic composting treating process, carbon-nitrogen ratio and water content are adjusted by adding cunninghamia lanceolata chips, the high-temperature-resistant and acid-proof alicyclobacillus are used, during linked optimization processes of heating, stirring and time controlling, energy conservation is achieved, the treatment efficiency is improved, the composting product meeting national standards and industrial standards is produced, and requirements of environment protection and sustainable development are met.

The invention discloses a method for measuring real-time frequencies in a protection device. The method comprises the following steps that: step 1) fixed-interval sampling is performed on the whole cyclic waves of measured electrical signals; step 2) a calculation formula is obtained; step 3) N/2 of the number of points is added to the value of the latter part of the calculation formula; step 4) angular frequency deviation is obtained through calculation; and step 5) a real-time angular frequency is calculated based on the angular frequency deviation, and conversion is performed on the real-time angular frequency, so that the real-time frequency of the measured electrical signals can be obtained. According to the method, the sinusoidal waveform characteristics of power frequency signals are utilized; fixed-interval sampling values are used, so that curve fitting and accumulation are performed, and therefore, frequency difference can be derived on the basis of a fixed power frequency, and therefore, an actual frequency value can be obtained. Since the actual frequency value can be obtained with few sampling points, no complex logic operation is involved in a measurement process, and therefore, the method can be implemented simply and efficiently; and the frequency measurement accuracy of the method in practical application can fully meet the relay protection and measurement requirements of a power system.

The invention discloses a solid state disk with power-down protection and physical destruction functions. The solid state disk with power-down protection and physical destruction functions includes asolid state disk, wherein the solid state disk is internally composed of a main control chip, a flash memory array, a power supply system, a destruction control module and an energy storage unit; theenergy storage unit uses a plurality of large-capacity electrolytic capacitors in parallel connection to store energy for the destroying circuit to use, and short-time power supply is provided at themoment of power down of the solid state disk; and the power supply system is composed of a boosting and charging and discharging circuit, a power supply changeover switch, an energy storage unit, a power down detection module, a power supply management unit and a destroying trigger switch. According to the invention, the specially designed circuit is added in the compact space of the solid state disk; and meanwhile, two requirements of data integrity protection and hard disk data irreversible physical destruction under an abnormal power failure condition are met, and the functionality and thesafety of the solid state disk are improved, and the number of components in the solid state disk is greatly reduced through multiplexing of the energy storage element, and the internal space of the solid state disk is saved.

The invention relates to the technical field of hardened films, in particular to a high-wear-resistance high-toughness hardened layer coating liquid and a hardened film. In order to solve the problemof poor wear resistance of the surface of an existing transparent film, the invention provides the high-wear-resistance high-toughness hardened layer coating liquid and the hardened film. The hardenedlayer coating liquid comprises the following components in percentage by weight: 30%-80% of an acrylate prepolymer, 5%-30% of an acrylate monomer, 10%-40% of silicon dioxide nanoparticles, 1%-6% of aphotoinitiator and 0.1%-0.5% of an auxiliary agent, wherein the particle size of the silicon dioxide nanoparticles is 10-100 nm. The hardened layer coating liquid provided by the invention has high wear resistance and good flexibility after being cured to form a hardened layer. The hardened film provided by the invention has the characteristics of high hardness, high wear resistance, high light transmittance and low haze, meets the proper toughness requirement, and is suitable for the external protection function of a display screen.

The invention relates to the field of coatings, and provides high-conductivity weldable pre-coating primer based on a conductive composite material and a preparing method thereof. The problem that when a pre-coating primer coating of a pre-coating primer product in the prior art is not removed, electric resistance welding and plasma welding functions cannot be achieved is solved. The high-conductivity weldable pre-coating primer is composed of a first component and a second component, wherein the first component is prepared from, by weight, 2-10 parts of epoxy resin, 10-15 parts of a solvent,0.1-1 part of a dispersing agent, 50-90 parts of metallic conductive powder, 0.01-1 part of nonmetallic conductive powder, 1-3 parts of a rheological additive, 0.1-1 part of an antifoaming agent and 0.5-1 part of an adhesion promoter, and the second component is prepared from, by weight, 30-80 parts of a polyamine curing agent and 20-70 parts of a solvent.

The invention provides a method for treating caprolactam production wastewater. The method comprises the following steps of (1) salting-out: adding inorganic salt into a reactor, while continuously leading the caprolactam production wastewater and/or reflux liquid, continuously evaporating moisture, and precipitating organic matters in the wastewater in a floccule form under the salting-out function; (2) flocculating: continuously leading the wastewater containing the floccule into an overflow tank, adding a flocculant into the overflow tank, flocculating and settling suspensions containing the floccule in the wastewater, and enabling the supernatant of the overflow tank to flow back to the reactor; (3) thinning the wastewater subjected to salting-out and flocculating, sending into a membrane biological reactor, and further performing biochemical treatment, wherein the membrane biological reactor comprises an A/O biochemical system, a dynamic membrane filter, a dynamic membrane preparation system and a hydraulic backflushing device. The method has the advantages that the energy consumption is low, the operation cost is low, and a large amount of caprolactam wastewater can be effectively and quickly treated.

The invention discloses a rapid and automatic unfolding and folding protective cover. A sectional type radar protection frame automatic unfolding and folding device comprises a vehicle carrying platform, a lower rocker, a lower connecting rod, a long connecting rod support, a turnover oil cylinder, the protective cover, a folding oil cylinder, a long connecting rod, an upper rocker and an upper connecting rod, wherein the protective cover comprises a vertical plate, an oblique plate and a horizontal plate, the protective cover is of a symmetrical structure on the two sides, the lower rocker, the lower connecting rod, the vertical plate and the vehicle carrying platform form a four-bar linkage mechanism, the long connecting rod support, the vertical plate, the oblique plate and the long connecting rod form a four-bar linkage mechanism, and the oblique plate, the horizontal plate, the upper rocker and the upper connecting rod form a four-bar linkage mechanism. According to the device, camouflage and protection integrated design is adopted, the protective cover has a camouflage function, camouflage tarpaulin does not need to be additionally arranged, fast erection and retraction are achieved, full-automatic operation is achieved, the full-automatic operation is achieved by hydraulic driving, so that manpower is saved.

The invention relates to a multifunctional active mimic circuit breaker. The multifunctional active mimic circuit breaker comprises a shell body, a built-in battery and built-in circuits, wherein the built-in battery and the built-in circuits are contained inside the shell body, the built-in circuits comprise three paths of circuits of the same structure, each path of circuits comprises a switching-on circuit, a tripping circuit and a position-remaining circuit, the built-in circuits further comprise a circuit formed by connecting a three-phase/ single-phase change-over switch with a three-phase/ single-phase change-over relay ZH in series and a circuit formed by connecting contacts of a position relay with each phase of switching-on indication lamps in series, the outer shell is a cuboid metal outer shell made of metal plates, and a three-phase connection/disconnection operation and display area, an auxiliary contact connecting area, a 110V coil connecting-in point connecting area and an idle contact connection-in point connecting area are respectively manufactured on a front panel of the metal outer shell. The multifunctional active mimic circuit breaker is provided with the simple circuits, is high in cost performance, is used flexibly on site, and can save cost.

The invention discloses a short-circuit current calculation method for a double-fed wind power generation system by considering different slips. Double-fed wind power generators are divided into two types based on slips: a type with large slip and a type with small slip. The double-fed wind power generator in the type with large slip takes positive sequence equivalent impedance as a positive sequence equivalent model, and the double-fed wind power generator in the type with small slip adopts equivalent potential to be serially connected with positive sequence equivalent impedance to be taken as a positive sequence equivalent model; next, negative sequence equivalent impedance is taken as a negative sequence equivalent model of the double-fed wind power generator; and finally, by performing joint solving on the positive sequence equivalent impedance, the negative sequence equivalent impedance of the double-fed wind power generator and an equivalent circuit of an electric power system, the short-circuit current of the double-fed wind power generation system is worked out. By considering influence of different slips to short-circuit calculation sequence component models of the double-fed wind power generators, the short-circuit calculation models for the double-fed wind power generators of different slips are established, so that short-circuit current calculation accuracy of the double-fed wind power generation system is improved.

The invention relates to an installation method of an optical fiber current transducer in power distribution network automation and belongs to the technical field of the optical fiber current transducers. The installation method comprises the following steps: coating silica gel on a needed installation position; closely fitting the concave surface of a sensing head on the silica gel and tightly binding by a binding belt; downward leading an optical fiber along a cable; separating the optical fiber from a conductor through a heat-resisting gasket and binding by the binding belt; when the optical fiber enters an armor or a shielding layer region, not utilizing the gasket; paving the optical fiber along a selected path and fixing at a proper position by utilizing the binding belt; carrying out polishing treatment on the section of the tail of the optical fiber through a special process. In an operation process, the cleanness of the section of the tail of the optical fiber needs to be kept, and the section is not in contact with mud, oil stains and the like; the section is not touched by fingers, so that a condition that refraction and reflection of light are caused by pollutants and the transmission of the light is influenced is avoided; a wide measurement range, high precision, a wide frequency band and rapid response of the optical fiber current transducer can be ensured; meanwhile, requirements on measurement and protection can bet met; whole insulation and high-temperature resistance are realized; the reliability of a power supply system is improved, and energy saving and environment friendliness are realized.

The invention relates to an additive used in the technical field of thick oil gathering and transportation, in particular to a low-temperature demulsifier for thick oil and a preparation method of the low-temperature demulsifier. The demulsifier is generated by reaction of hydrogen-containing silicone oil and methyl-terminated allyl polyoxyethylene polyoxypropylene ether under the action of a catalyst. The molar ratio of the hydrogen-containing silicone oil to the methyl-terminated allyl polyoxyethylene polyoxypropylene ether is 1: (0.1-1), preferably 1: (0.5-0.7). The demulsifier has the characteristics of simple synthesis process, low cost, strong adaptability and high low-temperature demulsification rate, and the demulsification rate of the demulsifier on oil field heavy oil reservoir produced liquid at the temperature of 50 DEG C or above and the concentration of 50 ppm reaches 98.5% or above. Meanwhile, the low-temperature demulsifier is wide in raw material source, simple in synthesis process, high in adaptability and small in dosage, and can meet the requirements of environmental protection and oilfield development.

An intelligent curtain controller based on fuzzy PID, which is connected with the execution motor of the intelligent curtain to control the opening and closing state of the shading part of the intelligent curtain, and is characterized in that it includes: a motor control part, connected with the execution motor, for sending a current signal to drive the operation of the execution motor; the communication part, which communicates with the external intelligent terminal; the light detection part, which is arranged on the indoor side of the curtain, and is used to detect the light intensity signal in the room; and the position detection part, which is used to detect the position of the shading part signal, wherein the motor control part includes a single-chip microcomputer main control unit, a power supply unit, and a motor drive unit. Because the single-chip main control unit of the motor control part therein can perform fuzzy PID control according to the situation of ambient light, so the intelligent curtain controller of the present invention can accurately control the opening and closing of intelligent curtains, satisfying people's rational use of natural light and protection. privacy needs.

The invention relates to a wound type motor protector and a protection method thereof. The wound type motor protector comprises a power supply circuit that is connected with all circuits. And the wound type motor protector is characterized in that: the motor protector comprises a current signal preprocessing circuit, a temperature signal collection circuit, an A/D conversion circuit, a microprocessor, a keyboard and display circuit, an alarm and trip control circuit, and a communication interface circuit. The current signal preprocessing circuit and the temperature signal collection circuit are connected with the keyboard and display circuit and the alarm and trip control circuit through the A/D conversion circuit and the microprocessor. The microprocessor is connected with an upper computer through the communication interface circuit. According to the invention, a design of two single-chip microcomputers is employed; a response speed and an execution speed of the protector and hardware reliability are improved; a demand of integration of a protection function, a measurement function, a control function and a communication function of a wound type motor is met; one machine with multiple functions is realized; and an ampere meter, a voltmeter, a thermorelay, a time relay and a leakage relay and the like can be replaced.

The invention relates to the technical field of block chains and federated learning, and relates to a federal learning method, system and device based on hierarchical and fragmented block chain, and the method comprises the steps that a main chain is constructed and a plurality of sub-chains are triggered through employing an intelligent contract; each sub-chain obtains task information and a basic model from the main chain, packages the task information and the basic model into a sub-chain transaction and submits the sub-chain transaction to the sub-chain; the intelligent terminal selected by each sub-chain main node pulls the task information and the basic model from the corresponding sub-chain for multi-round training; the sub-chain main node aggregates the sub-chain transactions uploaded by the intelligent terminals to obtain a fragmentation model of the round, and packages the fragmentation model into sub-chain transactions and submits the sub-chain transactions to the sub-chain; and each sub-chain main node packages the last round of fragmentation model in each fragmentation iteration into a main chain transaction, submits the main chain transaction to a main chain, and approves part of main chain transactions in the main chain. According to the hierarchical and fragmented block chain structure provided by the invention, the transaction processing burden caused by the fact that a single block chain network bears the whole federated learning task is reduced, and the multi-dimensional gain caused by the fusion of the block chain technology and federated learning is brought into full play.

The invention discloses a high pressure dust removing and external spraying system of a tunneling machine. The high pressure dust removing and external spraying system comprises a high pressure waterpump and a motor which are connected. A filtering machine is connected to a water inlet of the high pressure water pump. A water inlet of the filtering machine is connected with one end of a water inlet pipe. A pressure switch and a decompressing valve are sequentially arranged at the position, close to the water inlet of the filtering machine, of the water inlet pipe. The decompressing valve is connected with a pipe connector. The pressure switch is sequentially connected with an intrinsic safety connecting box and a flameproof start-up switch. The flameproof start-up switch is connected withthe high pressure water pump and the motor separately. A water outlet of the high pressure water pump is connected with one end of a water outlet pipe. The other end of the water outlet pipe is connected with two spraying modules. A safety valve is arranged at the water outlet pipe. The safety valve and the high pressure water pump are connected with a pressure meter. Water mist is sprayed in a mist mode, and therefore main dust producing points of the tunneling machine can be effectively covered to spray water mist and reduce dust.

The invention is suitable for the field of magnoliaceae magnolia plant cultivation, and discloses a breeding method for tissue culture of axillary buds of magnolia sinostellata. The breeding method comprises the following steps: explant selection, explant treatment, anti-browning treatment, primary culture, subculture, rooting culture and seedling transplantation, wherein a culture medium for primary culture comprises an MS basic culture medium, 0.5-2 mg/L of 6-BA, 0.2-1 mg/L of KT, 0.05-0.2 mg/L of NAA, 0.05-0.1 mg/L of IBA, 7 g/L of agar and 30 g/L of cane sugar, and the pH value of the primary culture medium is 5.8-6.5; a culture medium for subculture comprises the MS basic culture medium, 0.5-1.5 mg/L of 6-BA, 0.05-0.2 mg/L of NAA, 0.05-0.1 mg/L of IBA, 7 g/L of agar and 30 g/L of canesugar, and the pH value of the subculture medium is 5.8-6.5; and a culture medium for rooting culture comprises a 1/2MS basic culture medium, 1-2 mg/L of NAA, 1-2 mg/L of IBA, 7 g/L of agar and 30 g/L of cane sugar, and the pH value of the rooting culture medium is 5.8-6.5. According to the breeding method for tissue culture of the axillary buds of the magnolia sinostellata, the propagation speedof the magnolia sinostellata can be increased, and the obtained magnolia sinostellata seedlings can maintain the characteristics of mother seeds.

The invention discloses a preparing process for a trace element addition agent of basic zinc chloride, which is characterized in that adding basic zinc carbonate in hydrochloric acid, wherein the mole ratio of usage of the basic zinc carbonate to content of hydrogen chloride of the hydrochloric acid is 2 : 4, the reaction product can be obtained under the temperature of 60-95 DEGC in 5-8 pH value, then washing, centrifugal separating and drying the reaction product, thereby obtaining the basic zinc carbonate. The reaction solution from centrifugal separation can be used as a mother solution of the other preparing process, which can further react with zinc oxide to form the basic zinc carbonate, thereby realizing recycling of secondary product. The preparing process has the advantages of simple process, low cost, reliable quality without impurity, little environmental pollution and the like.

The invention discloses a wooden energy dissipation and shock absorption device and a wooden structure system with the same. The wooden energy dissipation and shock absorption device comprises two connecting sections, wherein the two connecting sections are connected through an energy dissipation section. The energy dissipation section comprises two sections of wooden connecting pieces, wherein the two sections of the wooden connecting pieces are connected through soft steel shear dampers, dovetail-shaped tenons are separately arranged at the outer ends of the two wooden connecting pieces, dovetail-shaped grooves are separately formed in the two connecting sections, and the tenons of the two wooden connecting pieces are separately inserted into the grooves of the two connecting sections. The connecting sections are wooden columns or wooden panel walls. When the connecting sections are the wooden columns, friction plates are separately arranged at the outer ends of the two wooden connecting pieces. A main structure of the wooden structure system is rigidly connected with the wooden energy dissipation and shock absorption device. According to the wooden energy dissipation and shock absorption device, earthquake energy can be dissipated, the damage to wooden structure buildings under an earthquake is reduced, and energy dissipation components after the earthquake are convenient toreplace. The wooden energy dissipation and shock absorption device and the wooden structure system with the same can be used for improving the seismic performance of existing wooden structure buildings and building new wooden structure buildings.

The invention relates to a circuit breaker with a grounding protection function and an electric leakage protection function. The circuit breaker comprises the components of four current transformers (CT1,CT2,CT3,CT4), one double-tap zero-sequence mutual inductor (CTZ), a dial switch (S1), resistors (R1,R2), a button (S2) and an intelligent tripping device (CE). Switching between different signals is realized through matching between the dial switch (S1) and the double-tap zero-sequence mutual inductor (CTZ). After data acquisition and conversion by the intelligent tripping device (CE), protection is performed. Combination of the grounding protection function and the electric leakage protection function is realized. According to the circuit breaker, free switching between the electric leakage protection function and the grounding protection function is realized through changing the position of the dial switch (S1), production cost of the circuit breaker and user cost are reduced. Furthermore the circuit breaker can satisfy a requirement of a power supply system for selection from grounding protection and electric leakage protection.

The invention discloses an engine cover outer plate side edge supporting plate structure. The supporting plate structure comprises an engine cover inner plate and a supporting plate body; engine coverhinges are fixedly mounted on the two sides of the engine cover inner plate correspondingly; an engine cover hinge reinforcing plate is fixedly mounted at the upper part of the engine cover inner plate; the supporting plate body is fixedly welded to the engine cover inner plate; a first positioning hole and a second positioning hole are formed in the two sides of the upper portion of the supporting plate body respectively; a gluing groove is formed in one side of the supporting plate body; lightening holes are formed in one side of the supporting plate body; and weakening ribs are fixedly welded to the upper portion of the bottom of the supporting plate body. The weakening ribs are fixedly welded to the fixing plate of the structure, so that the engine cover is vertically weakened, the requirements for rigidity, sinking resistance, modality, pedestrian protection and process performance of the engine cover can be met, the lightening holes are formed in the inclined part of the structure, the weight of the engine cover is reduced through the lightening holes, and light weight of the whole vehicle is facilitated.

The invention provides a grounding protection method and system based on a centralized new energy grid connection mode. Wiring modes and related grounding modes of grid connection primary systems of awind field and a photovoltaic power station are determined, and protection tripping or line selection tripping is determined in combination with a specific grounding capacitance current value; and according to the grounding modes of the wind field and the photovoltaic power station, corresponding over-current protection and zero-sequence over-current protection schemes are configured, and fault sequence network analysis is carried out by adopting a symmetric component method to further determine the protection tripping scheme. Tripping and shunt tripping strategies determined by the determined protection scheme make special requirements for guaranteeing rapid fault removal, avoiding overvoltage and the like; and the needs of two-party protection and safe and stable operation are met at the same time on the premise that the selection is unified with a power system.

The invention discloses a label feature near-duplicate video detection method based on convolutional neural network semantic classification, and aims to solve the problems of large feature storage space, low retrieval efficiency and the like in the existing near-duplicate video retrieval field. The method comprises the following steps: firstly, extracting dense semantic classification label features from a video by utilizing a deep convolutional neural network model; removing redundancy according to repeatability among the video frame label features to obtain semantic classification label features of the video; carrying out similarity matching on the feature vectors of the query video and the library video; and finally, measuring the similarity of the two videos by calculating a Jaccard coefficient so as to achieve the detection of the nearly repeated videos, wherein the two steps of video tag feature redundancy elimination and feature matching have two implementation modes of a videolevel and a frame level, namely, nearly repeated video detection based on semantic classification tag features can be achieved through two different levels of methods. According to the invention, near-repetitive video detection can be rapidly realized, and the method has certain robustness for video editing transformation and noise.

The invention provides a high-voltage alternating current sensor which integrates functions of measurement and protection by using the frequency spectrum technology based on the alternating-current magneto-optic modulation theory and the Ampere circuital theorem. By the high-voltage alternating current sensor, the high-accuracy measurement requirement of common current and the high-accuracy measurement and protection requirement of heavy current also can both be met. A 2-times frequency component (2 omega), 4-times frequency component (4 omega), 8-times frequency component (8 omega) and 10-times frequency component (10 omega) are selected respectively by a filter; the amplitude of the 4-times frequency component is divided by the amplitude of the 2-times frequency component to be used formeasuring the common current; and the amplitude of the 10-times frequency component is divided by the amplitude of the 8-times frequency component to be used for measuring and protecting the ultra-heavy current. The high-voltage alternating current sensor can be better applied in the field of high-voltage current sensing.

The invention discloses fixed and mobile television and telephone communication auxiliary equipment, belongs to the technical field of communication, and solves the problems that a communication cable cannot be clamped and limited by an existing device, so that the cable is scattered, and an electric power accident occurs. The device is technically characterized in that the device comprises a base, an auxiliary assembly is arranged above the base, the auxiliary assembly comprises an outer protection plate and an inner limiting plate, the inner side of the outer protection plate is provided with the inner limiting plate, the base is provided with a driving mechanism used for adjusting the position of the outer protection plate, and a cable fixing assembly used for clamping a cable is arranged in the inner limiting plate; according to the embodiment of the invention, the driving mechanism is arranged, the distance between the outer protection plates is adjusted through the arrangement of the driving mechanism, then communication equipment of different models is fixed and protected, cables of different models are clamped and limited through cooperative work of the fixed wire guide plate and the movable wire guide plate, and the cables are prevented from falling off.

The invention discloses a dimming device capable of simultaneously realizing electric response and temperature response, a preparation method thereof, a dimming method and an optical device. The dual-response dimming device comprises a first light transmitting substrate, a first electrode layer, a temperature response type polymer stabilized liquid crystal layer, an electric response type cholesteric liquid crystal layer, a second electrode layer and a second light transmitting substrate which are laminated in sequence, and the second electrode layer comprises an interdigitated electrode array. Compared with the technical scheme of singly using a polymer stabilized cholesteric liquid crystal layer to realize temperature response and the technical scheme of singly using a cholesteric liquidcrystal layer to realize electric response, the dual-response dimming device provided by the invention can achieve dual coupling of temperature response and electric response so as to meet the requirements of people for energy conservation, emission reduction and privacy protection. The dual-response dimming device provided by the invention has a variety of different light transmission states, thereby having rich modes, saving energy, protecting the environment and having a better application prospect in the fields of window glass, home glass windows, glass curtain walls and the like.

The invention relates to the technical field of oil field development, and particularly relates to a temperature-resistant clay anti-swelling agent for acidification in an oil field. The clay anti-swelling agent is prepared by carrying out reaction on 1,5-dihydroxynaphthalene and an acrylic acid to generate an intermediate; then carrying out reaction on the intermediate and aniline through amidation reaction to prepare the clay anti-swelling agent, wherein the molar ratio of 1,5-dihydroxynaphthalene to the acrylic acid to the aniline is 1:(0.9 to 1.8):(1.1 to 1.4), preferably 1:1.2:1.2. The clay anti-swelling agent is characterized in that the anti-swelling agent has the advantages of simple preparation process, low cost, strong adaptability, strong stability, high temperature resistance and anti-swelling effect; the highest temperature resistance is up to 180 DEG C, and the anti-swelling ratio is up to 95 percent or above. Therefore, the temperature-resistant clay anti-swelling agent can be widely applied to a clay anti-swelling technique for acidification in the oil field.