1920results about How to "Guaranteed life" patented technology

The invention provides a shifting register unit and a driving method thereof, a gate driving circuit and a display device. The potential of a pull-up control node is pulled up continuously by output signals of a multistage shifting register circuit, output noise of the shifting resister unit can be released through the high potential of the pull-up control node, and therefore, quality of display device products is improved, and service life and long-term performance stability of GOA (gate drive on array) circuits are guaranteed. The shifting register unit comprises an input module, a pull-up module, a pull-down control module, a pull-up control module and a pull-down module.

The invention discloses a minimum equivalent fuel consumption-based hybrid electrical vehicle control method, which comprises the following steps of: acquiring a nominal equivalence factor offline; acquiring signals; identifying working conditions; performing adaptive regulation; and performing optimum control. Under the condition of meeting the requirement of dynamic property, the minimum equivalent fuel consumption-based hybrid electrical vehicle control method is adopted, adaptive regulation can be performed according to an actual working condition, and the electric quantity balance of a storage battery is ensured, so that the performance and service life of the storage battery are ensured. The nominal equivalence factor is acquired through simulation calculation in the offline state, and calculated quantity for real-time control of the whole vehicle is reduced. In addition, different from a global optimal control method in which a future vehicle running working condition is required to be known (the future vehicle running working condition is unpredictable actually), the method has high implementability; and by the method, the real-time optimal energy management decision can be provided, the fuel economy of the whole vehicle is further improved, and the emission is reduced.

The invention discloses a method for testing mechanical property and reliability of a thin film material of a micro-electromechanical system (MEMS) and a testing device thereof. A thin film testing structure with a suspended membrane is fixed on a sample platform with a gas passage and a differential pressure is imposed on one side of the suspended membrane to cause the other side of the suspended membrane to be deformed and heave; the deflection at the center of the membrane under the impressed pressure is measured, namely the maximum deflection of the membrane and the pressure is gradually increased to cause the suspended membrane to fracture; such parameters related to the mechanical property and reliability of the tested thin film material as plane strain modulus, Young modulus, Poisson ratio, residual stress, rupture strength and the like are extracted and obtained with the measurement of a pressure-deflection change curve and in accordance with a theory calculating model. The invention adopts a non-contact optical method, utilizes a data acquisition and control unit to automatically implement the measurement of the deflection and is characterized by simple sample preparation and testing, high measurement accuracy, convenient and flexible operation and high testing efficiency.

The invention discloses a drive circuit capable of improving power factors of an alternating current light emitting diode (AC LED) lamp. The drive circuit comprises a rectifier bridge, wherein two input terminals of the rectifier bridge are connected with AC voltage. The drive circuit is characterized in that: the positive output terminal of the rectifier bridge is connected with positive terminals of n serially connected LED lamp strings and detection terminals of n self-controlled constant-current circuits; the negative output terminal of the rectifier bridge is connected with the output terminals of the n self-controlled constant-current circuits; the negative terminal of the nth LED lamp string is connected with the input terminal of the self-controlled constant-current circuit with serial number of n, wherein n is more than or equal to 2 but less than or equal to 10; and in the n serially connected LED lamp strings, the number of LEDs in each lamp string is the same. The drive circuit uses a circuit design method of automatically controlling operating modes of the n constant-current circuits in stages by detecting AC input voltage so as to greatly improve the power factor, reliability and safety of the AC LED; and an AC / DC converter is not needed to be installed in the lamp, and then the failure rate of equipment is reduced. Furthermore, the drive circuit has the advantages of novel structure, simple circuit, high power factor, long service life, good power-saving effect and the like.

The invention discloses a method for controlling a hybrid power vehicle. The method comprises the following steps of: according to the arrangement form of transmission parts of the hybrid power vehicle, dividing operating modes; determining an efficiency calculation formula of each operating mode; and according to the size of a requirement torque Tr and a range of a state of charge (SOC) value of a storage battery, determining possible operating modes, respectively calculating system efficiency in different operating modes, and comparing the efficiency of a hybrid power system in the different operating modes to obtain the allocation situation of engine torques and motor torques with the highest efficiency. In the process of meeting the requirement torque, based on the method for controlling the hybrid power vehicle with the optimum system efficiency, the transmission parts operate in respective high-efficiency areas, so that the overall efficiency of the whole transmission system is maximized, the power loss of the system is reduced, the consumption and discharge of the fuel oil of the whole vehicle are reduced, lubricating conditions are guaranteed to a certain extent, and the service life of the transmission parts is prolonged to a certain extent.

The invention discloses a control method of an electronic expansion valve, a radiation air conditioner and a storage medium. After a startup instruction is received, operation mode information in thestartup instruction is obtained; when the operation mode is refrigeration or dehumidification, the openness of the electronic expansion valve is set as preset initial openness; finally, after the radiation air conditioner is operated by a first preset time length according to the preset initial openness, a superheat degree of an evaporator is calculated, and the openness of the electronic expansion valve is adjusted according to the superheat degree, so that liquid impact and damage of the compressor caused by halfway evaporation of a refrigerant in the evaporator are prevented, frequent stopof the compressor caused by higher superheat degree of the evaporator is prevented, the control precision of the superheat degree of the radiation air conditioner is improved, and the operation stability and the life of the compressor are guaranteed.

The present invention relates to spiral type corrugated plastic pipe material and its preparation method. The perparation method includes following steps: using a first extrusion mechanism to extrudethe fused bar shaped plastic sheet material used as pipe wall material which is wound around the pipe axis in the form of spiral-joint pipe with adjucent edges mutually lap-fused jointed successively, then using a press roller mechanism tightly press the spirally lap-fused joint to form the spiral-joint plastic pipe; similarly, using another extrusion mechanism extrudes corresponding rib type strengthening trapesoidal plastic tube and using the same spiral winding mode to press the said plastic tube on the spiral-joint of the above-mentioned plastic pipe to obtain the said corrugated plastic pipe.

The invention discloses an electrohydraulic-combined brake control method of a battery electric vehicle and belongs to the technical field of electric vehicle control. During braking of an electric vehicle, stability of a vehicle body is guaranteed, part of braking energy can be recycled during braking by the aid of reversible power characteristics of a wheel hub motor, charging strategy can be optimized according to the size of electric current generated, kinetic energy consumed during braking can be converted into electric energy to be stored, and the purpose of increasing continuous driving range can be achieved. Relevant signals measured by a sensor and about a brake pedal, travel speed, wheel speed, brake cylinder pressure, battery end voltage, battery charging current, torque of a motor and the like are transmitted to a control system, the status of the vehicle body, wheels and a battery are monitored in real time by a controller, different barking requirements, energy recycling process braking security maintenance are realized by adjusting motor electromagnetic braking torque and hydraulic mechanical braking torque through an electrohydraulic-combined system, and higher efficiency can be achieved in utilization of energy of the electric vehicle.

“Packaging for receiving a substance having chemical properties which may change between a time when the substance is introduced for the first time into the packaging and a later time when the substance is used, the packaging includinga main body;a closure member;a first sensor arranged in the main body and suitable for delivering a signal representing a measurement of a physicochemical property of the substance contained in the packaging;a display member for generating visual information representing the measurement;a processing unit for conditioning the signal delivered by the first sensor and for displaying the visual information by means of the display member;an electric power source for supplying the first sensor, the display member and the processing unit.

The invention relates to a composite microorganism livestock and poultry feed additive and manufacturing method thereof, belonging to the feed technology field. The invention discloses a composite microorganism livestock and poultry feed additive, which is characterized in comprising composite bacterium powder in 1.0-15% of total mass protion; wherein, the composite bacterium powder is compatible of any two or more of the lactobacillus, yeast, pediococcus acidilactici and fecal streptococcus. the strains in the microorganism feed additive of the invention can symbiose to each other, which is favorable to performance their biological activities, and can keep enough shelf life and live bacteria quantity. The invention also achieves the advantages of controlled production process, lower cost and stable product quality.

The invention discloses an externally laid masonry composite heat-insulating sintered building block exterior wall heat insulating system, and relates to the technical field of building wall heat insulating and energy saving technology. The system comprises an exterior wall main body structure, a ring beam gutter, a floor gutter, a heat insulating material, I-type main building blocks, II-type main building blocks and the like, wherein the external laid masonry composite heat insulating sintered building blocks are laid and built outside a building exterior wall structure part; the heat insulating material is placed in the sintered building blocks; and an air space is reserved in the building blocks and outside the heat insulating material, and a protective layer is arranged on the outer side. The externally laid masonry composite heat-insulating sintered building blocks consist of main building blocks, corner matching blocks and hole matching blocks, wherein the main building blocks are divided into the I-type main building blocks and II-type main building blocks in category; and the corner matching blocks are divided into external corner matching blocks and internal corner matching blocks. The system has the advantages of easiness, convenience and practicability in building type construction, high construction speed, excellent wall integrity, superior wind resistance to the conventional sandwich heat insulation, factory production of materials and capability of reducing a complex operation process with high probability of causing the quality problem on site.

The invention discloses a method of a manufacturing technology of an ultra-deep large cylinder-shaped drilling platform main hull, which comprises the following steps: division of construction stage of the cylinder-shaped drilling platform main hull, construction of double bottom total stage, manufacturing folding of a cylinder body, folding of deck section, and carry and hoisting of superstructure. The invention is provided with a platform structure for strengthening the whole resistance, can be applicable to various marine environments, is free from changing navigation bearing with the wind, has better stability, and can achieve the safety level of preventing immeasurable wind waves.

The invention relates to a treatment method for recycle of oil field produced water. The treatment method comprises an air floatation process, a biochemical treatment process, a filtration process, an ultrafiltration process and a reverse osmosis process. Oil field produced water is subjected to the biochemical treatment process so that the content of organic matters, petroleum matters and oligomers in the oil field produced water can be effectively reduced, wherein the organic matters, the petroleum matters and the oligomers can cause membrane pollution easily. The oil field produced water subjected to the biochemical treatment process orderly passes through a double-filter material filter and a disc filter so that a part of suspensions are removed, then enters into an ultrafiltration device and is subjected to designed conventional backwashing and dosing backwashing in a forced circulation-crossflow filtration way. Ultrafiltration produced water enters into a reverse osmosis device and is subjected to designed timed low-voltage positive pulse processing and regular sterilization. Reverse osmosis produced water is recycled and is utilized as high-quality thermal recovery boiler water. Reverse osmosis concentrated water is subjected to recharge processing. Through the air floatation process, the biochemical treatment process, the filtration process and a special membrane operation mode, cleaning periods and service lives of an ultrafilter membrane and a reverse osmosis membrane can be effectively prolonged. The treatment method has the characteristics of high treatment efficiency, good economic effectiveness and stability.

The invention relates to a charging method of a lithium ion battery, which belongs to the technical field of battery charging and can be used for computing the value change of the polarizing voltage of the battery by a calculation formula of the polarizing voltage of the battery, wherein the calculation formula is that UP=UO-UOCV-UR=UO-f(SOC)-I*Rd. The polarizing voltage is controlled to be within a certain numerical value range for ensuring that aberration produced on a charging voltage curve is invariant. The corresponding charging current of the battery in different SOC (State of Charge) and the same polarizing voltage during charging is automatically regulated so that the charging speed of the battery is controllable. On the premise of ensuring the service life of the battery, the charging method largely enhances the charging speed of the battery. Simultaneously, the charging time is shortened, thereby enhancing the utilization efficiency of the battery, reducing the quantity of standby battery packs in the replacement mode of the battery and providing conditions for the scale application of electric vehicles.

The invention aims to provide a connected grid wind-light complementation control inverting device which comprises a storage battery charging unit, a DC-DC voltage boosting and stabilizing unit, a connected grid inverting unit and a storage battery; the storage battery charging unit is connected with the DC-DC voltage boosting and stabilizing unit; and the DC-DC voltage boosting and stabilizing unit is connected with the connected grid inverting unit and the storage batter. The device prolongs the power generation time with the complementation of solar energy and wind energy, improves the continuity of the current which is injected into a power grid, and effectively improves the utilization rate of the solar energy and the wind energy; a solar panel automatic tracking system keeps correcting the horizontal angle and the pitch angle of a solar panel, so that the power generation efficiency of a solar power generation system is the highest. The device adopts PWM stepless unloading and ensures the best storage battery charging property; and a current loop of an inverter is realized by an analog device, thereby improving the response speed of a system, ensuring the tracking property of inversion current to the voltage of the power grid, and improving the power factor.

A module type flue gas heat exchanger with fluorine plastic pipes comprises a heat exchanger casing and a heat exchange pipe, wherein the upper end of the heat exchanger casing is provided with water inlets and water outlets, and the lower end of the heat exchanger casing is provided with a drain outlet. A water inlet end plate is detachably connected to the position of the water inlets and provided with water inlet holes, and a water outlet end plate is detachably connected to the position of the water outlets and provided with water outlet holes. The heat exchange pipes are U-shaped fluorine plastic heat exchange pipe bundles, water inlet ends of the fluorine plastic pipes in the fluorine plastic heat exchange pipe bundles are communicated with the water inlet holes, water outlet ends of the fluorine plastic pipes in the fluorine plastic heat exchange pipe bundles are communicated with the water outlet holes, and positioning nets are parallelly distributed in the heat exchanger casing from top to bottom at intervals. Module type design is adopted by the flue gas heat exchanger, equipment utilizing rate of the flue gas heat exchanger is greatly improved, the positioning nets are used by the flue gas heat exchanger at a fixed interval so as to fix the fluorine plastic pipes in the fluorine plastic heat exchange pipe bundles, and shaking deformation of the flexible fluorine plastic pipes caused by flowing impact of flue gas can be avoided.

This is about a kind of catalyst to make complexes ether of low carbon, whose weight rate is: Mo: 20--40%, soil: 15--30%, Ma: 5--20%, K: 5--15%, S: 20--40%. Take the changing S reactivity to the S hua ammonia solution and Mo acid ammonia, add heavy Acetic acid, filter, dry, and make S dai Mo acid ammonia ether solution: make Ma salt ether solution, mixing them and take supersonic reaction, then get the precipitation, wash, dry and mix with K salt, crash, fire after taking protection air, add soil, mix, press to sheet, shape. The way of the invention is simple, easy to operate, high activity, high choosing ability of ether and low choosing ability of Hydrocarbon.

The invention discloses a method for evaluating the service life and safety of lithium secondary batteries, belongs to the field of secondary batteries and more particularly relates to a rapid evaluation method for lithium secondary batteries. In the method, a lithium secondary battery is first charged and discharged cyclically with the multiplying power more than 3C to test the cycle life; after the circulation, the battery goes through safety test and safety evaluation, thus the cycle life and the safety of the lithium secondary battery after cycle use can be acquired fast. The invention can fast and effectively judge the cycle life and the safety of the lithium secondary battery after cycle, has great effect on guaranteeing the life and safety of batteries and can decrease the time of warehousing waiting time cycle life test of batteries and safety performance test after the cycle.

The invention discloses a temperature rise control method for a variable-frequency air conditioner power module. The method includes the following steps that firstly, outdoor environment temperature is detected in real time and judged, and when the outdoor environment temperature is larger than a second preset threshold T2, the temperature rise control step is executed; secondly, the maximum operation frequency of a compressor is updated to the maximum permissible operation frequency of the compressor. According to the temperature rise control method for the variable-frequency air conditioner power module, firstly, whether an air conditioner is allowed to enter a power module temperature rise control mode is judged according to the outdoor environment temperature, then alternating-current voltage is sampled, the maximum permissible operation frequency of the compressor at current alternating-current voltage is calculated, and the maximum operation frequency of the compressor is limited below the maximum permissible operation frequency so as to prevent the situation that the operation frequency of the compressor is excessively large, and temperature rise of a power module is exacerbated. It is guaranteed that the temperature of the power module is limited in a safety operation range so as to guarantee the service life of the power module and normal operation of the air conditioner.

The invention relates to a high temperature tail gas anti-impact piece adjustable structure of a polycrystalline silicon high temperature tail gas heat exchanger. The structure comprises a column end cap (1), a spiral hole calandria (2) and a fixing connecting piece (3), wherein the column end cap (1) is in threaded connection with inner holes in one end of the spiral hole calandria (2); the fixing connecting piece (3) is in threaded connection with the other end of the spiral hole calandria (2); a plurality rows of spiral holes are formed in the wall of the spiral hole calandria (2). By adopting the structure, an anti-impact piece is high temperature resisting and corrosion resisting, the flowing speed of a high temperature inlet tail gas can be controlled so as to uniformly distribute the high temperature tail gas, an ideal heat exchange effect is achieved, and the service life of the polycrystalline silicon high temperature tail gas heat exchanger is prolonged.

The invention discloses a filament current value calibration method and device for an X-ray tube, and the method comprises the steps: receiving a few of to-be-calibrated tube current values and to-be-calibrated tube voltage values; obtaining a preset filament current value according to the to-be-calibrated tube current values, the to-be-calibrated tube voltage values, and the relation among a preset tube current value, a preset tube voltage value and the filament current value; receiving a first actual tube current value, collected externally, of the X-ray tube under the action of the to-be-calibrated tube voltage values and the preset filament current value during exposure; judging the size relation between the absolute value of the difference, between a first actual tube current value and the to-be-calibrated tube current value, and a first preset difference value, and the size relation between the absolute value of the difference, between the first actual tube current value and the to-be-calibrated tube current value, and a second preset difference value; and enabling the preset filament current value to serve as a calibrated standard filament current value corresponding to the first actual tube current value and the to-be-calibrated tube voltage value when the absolute value is less than or equal to the first preset difference value. The method is small in number of exposure times, and does not cause the service life of the X-ray tube to be reduced.

The invention discloses a pallet with an improved structure, and belongs to the technical field of stacking and packaging materials. The pallet comprises a pallet body consisting of a first pallet disc and a second pallet disc. Pallet support legs are formed at the two sides and the middle position of the second pallet disc. The pallet is characterized in that a group of lower bearing longitudinal cavities and reinforcing cavities are formed in the second pallet disc; a group of upper bearing longitudinal cavities and reinforcing cavities are formed in the first pallet disc; the tops of the lower bearing longitudinal cavities are integrally combined with the bottoms of the upper bearing longitudinal cavities; lower bearing transverse cavities and reinforcing cavities are formed in the second pallet disc; upper bearing transverse cavities and reinforcing cavities are formed in the first pallet disc; the tops of the lower bearing transverse cavities are integrally combined with the bottoms of the upper bearing transverse cavities; the tops of the lower bearing transverse reinforcing cavities are integrally combined with the bottoms of the upper bearing transverse reinforcing cavities; the cross sections of a pair of shovel arm cavities are n-shaped. According to the pallet, goods can be prevented from sliding off from the pallet body; the pallet body can be prevented from being deformed; lasting using effects are ensured; an ideal load bearing effect is achieved; the service life is ensured.

The invention provides a deep sea optical cable and producing method thereof, relating to a deep sea optical cable with a tension-resistant compact composite structure and producing method thereof. The structure of the deep sea optical cable comprises a plurality of full chromatogram high-strength optical fibres, high-strength anti-corrosion stainless steel tubes, ointment exclusive for sea cable optical fibre, special-high-strength armouring wires with three diversified diameters, a heavy viscous waterproof agent, metallic conductor brass pipes, organic plastic composite materials, and a polythene insulation material protective layer. High-strength anti-corrosion stainless steel tubes are sleeved on several full chromatogram high-strength optical fibres, ointment exclusive for sea cable optical fibre is filled into the high-strength anti-corrosion stainless steel tubes, special-high-strength armouring wires with three diversified diameters are inlaid on the outside of the high-strength anti-corrosion stainless steel tubes and are filled with heavy viscous waterproof agent of sufficient amount, the special-high-strength armouring wires are covered with the metallic conductor brass pipes, so that special tension-resistant compact composite structure is formed. Organic plastic composite materials are added on metallic conductor brass pipes, and then an insulation material protective layer is extruded thereon.

The invention discloses a graphene-bismuth oxide composite material. The graphene-bismuth oxide composite material comprises graphene as well as bismuth oxide loaded on a graphene sheet layer, wherein the mass ratio of bismuth oxide to graphene is (0.005-0.25):1. The invention also discloses a preparation method of the composite material as well as lead carbon battery cathode diachylon comprising the composite material as well as a preparation method of the lead carbon battery cathode diachylon and a lead carbon battery cathode plate. According to the invention, the generation of hydrogen on the surface of graphene is inhibited by loading bismuth oxide on the sheet layer of graphene, so that the hydrogen evolution phenomenon of the lead carbon battery cathode plate is inhibited; the reduction of lead carbon battery current efficiency and the battery water loss phenomenon are prevented effectively; the service life of the lead carbon battery is ensured.

The invention discloses a method and a device of accurately controlling voltage. In the method of accurately controlling voltage of the invention, a voltage control logic component, a D / A converter, a voltage generation circuit and an A / D converter are arranged to process real time adjustment to an output voltage on a working component so as to realize the accurate control of the output voltage on the working component. The aim of adopting the set is to combine the digital television with the analog television to accurately adjust the real time voltage on the working component so as to solve the problem that the big error between the ideal voltage and the real voltage which is generated by using the voltage generation module or circuit in the prior art.

The invention provides an automobile electronic expansion valve control method and device and a heat pump system. The automobile electronic expansion valve control method comprises the following stepsthat the battery core body temperature T, the target evaporator temperature T0, the rapid cooling threshold value T1, the battery water inlet temperature T2, the target superheat degree DZ of an evaporator and the target superheat degree DL of a cooler are obtained; the cooling grade of the battery is judged according to the battery core body temperature T and the rapid cooling threshold value T1; and the opening degree of a first electronic expansion valve at the evaporator and a second electronic expansion valve at the cooler is adjusted according to the battery cooling grade, and the rotating speed of the compressor is adjusted according to the battery cooling grade, the target evaporator temperature T0 and the battery water inlet temperature T2 so as to change the refrigerant flow. Bymeans of the control method, the refrigerant flow on the two sides of the evaporator and the cooler of the new energy automobile can be dynamically adjusted according to the air conditioner heat loadand the battery refrigeration requirement, on the premise that the service life of the battery is guaranteed, the comfort of the whole automobile is guaranteed to the maximum extent, and energy is saved.

The invention discloses a method for detecting polar stability by utilizing measuring equipment. The measuring device comprises a radar, a soil compactness determinator and a controller, wherein the radar and the soil compactness determinator are connected with the controller. The method comprises the following steps: sending an instruction judging stability of a polar to a detector by the controller, detecting breadth of root distribution of the polar, vertical depth of roots, height of the polar and diameter of a trunk of the polar by the radar in the measuring device, measuring the soil compactness by the soil compactness determinator, transmitting the measured data to the controller by the radar and the soil compactness determinator, wherein an operation control program used for judging safety performance of the polar is arranged in the controller, receiving data, analyzing and processing data, and outputting a determination result on a display screen of the controller. The stability of the polar is determined, so that the polar can be effectively prevented from tipping, personal safety of a person can be protected and property of the person can not lose, and an accident is avoided.

The invention discloses a multi-water-pump automatic control method of a central air conditioner energy-saving control system. The method comprises the steps that all states of water pumps are monitored, operating time real-time accumulation is updated and stored in real time, the water pumps capable of operating are sorted according to operating time real-time accumulation, and the water pump shortest in operating time is preferentially started according to the sequence till the number of the water pumps required by the system is met; and when the feedback state of the water pump shortest in operating time is any one of a manual control state, a failure state, a local control state, a power access failure state and a maintenance state, the operating state of the water pump is automatically displayed, an alarm is output, sorting is carried out again, and the water pumps are started. According to the method, multiple system states except for water pump failures are considered, operating of the water pumps is automatically stopped and restored to be started according to the monitoring states of the water pumps so as to deal with the operating conditions of the water pumps more comprehensively, the unattended aim of a machine room is achieved better, and normal operating of a central air conditioner is protected.

The invention discloses an energy control method of a hydrogen fuel cell and power cell hybrid power bus. The method comprises the following steps of: collecting motor power data, selecting SOC valueswithin a certain range around the average power value of the motor, and conducting interpolation distribution on the power range of a galvanic pile, increasing vehicle parking judgment, locking the variable-load frequency standard of the galvanic pile, and evaluating whether the variable-load frequency standard meets requirements or not, judging the SOH condition of the battery, and increasing the low SOC to forcibly start the reactor. Based on the galvanic pile system controller, the BMS and the whole vehicle controller system, energy control strategy assignment and optimization can be completed through real-time data. And the VCU is used for judging the power state of the whole vehicle, so that the low-power power supply and low-SOC forced starting operation of the parking galvanic pileare increased, and the healthy working states of the galvanic pile and the battery are further ensured. Therefore, the galvanic pile outputs as low as possible on the basis of meeting the power requirement of the whole vehicle as much as possible, and hydrogen consumption is reduced while the service life of the galvanic pile is ensured. And meanwhile, the battery can work in a relatively high and stable SOC interval, and the service life of the battery is prolonged.

The invention relates to a building material and a method for preparing the same, in particular to a glass fiber reinforced cement board and a method for preparing the same. The glass fiber reinforced cement board comprises the following components in weight portion: 100 portions of Portland cement, 13.6 to 15 portions of high alumina cement, 3.1 to 3.4 portions of fly ash, 5.7 to 6.3 percent of plaster stone powder, 120 to 132 portions of ceramsite, 6.5 to 7.1 percent of foaming agent, 74.5 to 81.3 percent of dispersing agent, 53 to 58.7 portions of pure water and 3.6 to 4 portions of plastic-coated glass fiber grid cloth. The preparation method sequentially comprises the following steps: mixing weighed-up solid materials, adding weighed-up liquid materials in the previous step, cavity forming, roll extruding, vibration, cutting and curing. The invention has the advantages that: the glass fiber reinforced cement board has advantages of light volume weight, high strength, low dry shrinkage wet swelling coefficient, no after expansion and shrinkage, corrosion resistance, sound insulation, heat insulation, fire resistance and non-combustion; the preparation method has the characteristics of scientific and reasonable method, continuous production, high efficiency and low cost, flat board surface, convenient in-site mounting and the like; the glass fiber reinforced cement board is good in water resistance, and particularly applied to the finishing of internal and external walls and ceilings of various buildings in wet environments; moreover, the glass fiber reinforced cement board and a method for preparing the same have the advantages of ensuring the strength and service life of cement due to the adoption of the plastic-coated anti-alkali glass fiber grid cloth, along with reasonable blending ratio and reduced alkalinity.