296results about How to "Save human and financial resources" patented technology

The invention provides a high temperature self-repairing conductive silver adhesive. The high temperature self-repairing conductive silver adhesive is prepared from the following raw constituents by parts: 100 parts of epoxy resin, 10-30 parts of curing agent, 10-40 parts of epoxy diluent, 240-990 parts of silver pieces, 3-20 parts of coupling agent and 5-20 parts of self-repairing microcapsule; wherein the self-repairing microcapsule is composed of the following raw constituents by parts: 100 parts of epoxy resin, 8-20 parts of latent curing agent, 30-60 parts of diluents, 0.5-2.5 parts of emulsifying agent, 500-800 parts of nano silver wires, 5-16 parts of coupling agent, 60-120 parts of capsule wall material, 0.5-2 parts of antifoaming agent and 150-900 parts of deionized water. The invention also provides a preparation method of the high temperature self-repairing conductive silver adhesive. The high temperature self-repairing conductive silver adhesive has the positive effects that the repairing efficiency is high, the repairing effect is expanded on the basis of the original conductive network, crack-conductive network double repairing is realized, and the long-term using effect of the conductive adhesive is guaranteed, the cost is saved, and the reliability and service life of the conductive adhesive in high temperature working environment are improved.

The invention discloses a bridge health monitoring system, which comprises a sensor, a sub-workstation, a server and a client. The sensor is used for acquiring structured data of each part of a bridge; the sub-workstation is used for preprocessing the data acquired by the sensor; the server is used for receiving the data transmitted by the sub-workstation and stores the data in a database; the client is used for processing, analyzing and displaying the data in the database; the sensor is connected with the sub-workstation, the sub-workstation is connected with the server through a local area network, and the server is connected with the client through the Internet; the sub-workstation preprocesses the data acquired by the sensor and transmits the processed data to the server; and the server receives the data and stores the processed data in the database, and the client processes, analyzes and displays the data in the database to realize the remote real-time monitoring of the health condition of each bridge. The client can perform remote real-time monitoring on the health condition of each scattered bridge, and can establish a large-scale monitoring network; and the client can be set flexibly and brings convenience to the real-time monitoring of the bridges.

The invention relates to an environment DNA identification method for fish community structure researching. The method is characterized by comprising the steps that 1, water samples are collected according to the size of the water area where a fish community is located; 2, the water samples are processed, and total environment DNA of the processed water samples is extracted; 3, a 16s r DNA sequence with nucleotide sequences being SEQ ID NO:1 and SEQ ID NO:2 is adopted as a universal primer to carry out PCR amplification on the total environment DNA, and a PCR product is obtained; 4, gel electrophoresis is carried out on the PCR product, and gel with DNA is obtained; 5, gel cutting and clone sequencing are carried out on the gel with the DNA, and then blast comparison is carried out through GENBANK so as to determine whether the DNA is a fish sequence or not; 6, after it is determined that the DNA is the fish sequence, the next-generation sequencing technology is adopted for analyzing composition conditions of the PCR product on a large scale, and therefore the environment DNA fish composition and community structure are determined. The environment DNA identification method is quite easy, convenient and efficient and has the practical value.

The invention discloses a data collection and control system for a target tracking segmented power supply street lamp. The data collection and control system comprises an LCD (liquid crystal display) interface, a serial printer interface, a keyboard interface, a microprocessor, an external storage module, an internal storage module, a clock synchronization module, a GPRS (general packet radio service) module, a wireless ratio frequency communication module or an electric carrier communication module, wherein the LCD interface and the serial printer interface are connected with the microprocessor through a serial port expansion module, the wireless radio communication module or the electric carrier communication module is connected with the target tracking segmented power supply street lamp system, the GPRS module is connected with a remote street lamp management center, and the system adopts the real-time management data structure and the roll polling algorithm for realizing the state roll polling. The system can automatically collect the real-time data of the street lamp system, and can realize the automatic statistics analysis, high-speed large-volume storage and street lamp control, the real-time work state can be mastered in real time, and the operation fault can be found. The street lamps are organized and managed in different segments, the data collection and control system adapts to the duplex requirements of traffic management, energy saving and environment protection, and the management efficiency of an illumination system is improved.

The invention provides a preparation method for a TiAl alloy plate of a uniform structure and relates to the preparation method for the TiAl alloy plate. The preparation method for the TiAl alloy plate of the uniform structure aims at solving the problems that the structure of an existing TiAl alloy plate is nonuniform, and the comprehensive performance is reduced. The preparation method comprises the steps that 1, blank preparing is conducted to obtain a cuboid TiAl alloy rolling blank; 2, sleeving is conducted to obtain a sleeved TiAl alloy blank; 3, double-step heat treatment is conducted before high-temperature rolling to obtain a TiAl alloy blank subjected to double-step heat treatment; 4, high-temperature rolling and heat preserving during passes are conducted to obtain a TiAl alloy plate subjected to high-temperature rolling; 5, stress relief annealing is conducted to obtain an annealed TiAl alloy plate; and 6, a sleeve is removed through machining, so that the TiAl alloy plate is obtained. The preparation method for the TiAl alloy plate of the uniform structure has the advantage that the TiAl alloy plate of the uniform structure is obtained by adopting double-step heat treatment before rolling. The preparation method is mainly used for preparing the TiAl alloy plate of the uniform structure.

The invention provides a ganoderma lucidum cultivation method, and belongs to the technical field of cultivation of fungus for edible and medicinal use. The ganoderma lucidum cultivation method comprises choosing of a field, selection of building materials, construction of a permanent greenhouse, consolidation of sand culture bed land, isolation of contact between sand and soil in the field through plastic membranes, sand burying of ganoderma lucidum fungus sticks, laying of spraying pipelines, shading, insect prevention measures, and the like. According to the ganoderma lucidum cultivation method, standardized cultivation of ganoderma lucidum can be achieved, cultivation conditions can be controlled, traditional Chinese medicine quality management code requirements are fitted, a foundation is not needed to be moved every year, and manpower, material resources and financial resources are saved. The ganoderma lucidum fungus sticks are not contacted with the soil, so heavy metal, toxic substances and pesticide residues all can be controlled effectively. Cultivated ganoderma lucidum is stable and high in yield, namely the yield of the ganoderma lucidum is 570-580 kilograms per mu and is increased by 30% or so compared with conventional cultivation, quality is excellent, namely, competitor pollution rates of the fungus sticks and secondary entities are greatly reduced, malformation does not exist in the secondary entities, and the secondary entities cannot be polluted by water and pollutants in the soil, and the ganoderma lucidum cultivation method is popularization and application of ganoderma lucidum standardized cultivation. The ganoderma lucidum cultivation method is also suitable for edible and medicinal fungus of phellinus igniarius, mushrooms, agaric and the like.

The invention discloses an unpowered full-automatic loading machine for bagged cement. The unpowered full-automatic loading machine is characterized by comprising a distributing mechanism, a reversing mechanism and a positioning stacking mechanism; the reversing mechanism is connected to the lower portion of the distributing mechanism; the positioning stacking mechanism is perpendicularly placed below the reversing mechanism; the distributing mechanism comprises a distributing poking piece, a poking piece shaft and a cement distributing channel; the reversing mechanism comprises a guide column, a reversing adjustment control valve, a guide frame, a reversing connecting rod, a pulling rod reset spring, a supporting plate bracket, a supporting plate and a supporting plate control valve; and the positioning stacking mechanism comprises a springback pulling cable, a trolley supporting plate, a sliding rail, a springback pulley, a reset counterweight and a trolley position control switch. According to the unpowered full-automatic loading machine for the bagged cement, the gravity of the bagged cement is used as power, no additional driving force is added, and the power loss is reduced; and in addition, impact is reduced, so that the component loss is reduced, the component reliability is ensured, and thus loading operation of the cement is conducted in the mode of high efficiency and low cost.

The invention belongs to the technical field of buildings, relating to an automatic wall-forming device and method of static pressure continuous concrete wall used for anti-seepage, water interception and retaining occasions such as deep foundation pit, tunnel and riverbank; the existing full hydraulic static pile machine is used as a host machine; two automatic wall-forming device combinations mutually associated and respectively independently moved having wave-shaped sections can be clamped simultaneously; the surface shape of the wave-shaped plate and the rectangle inside casing are used as references, and the two short outer edges thereof are respectively provided with connectors having specific guiding limit function; the automatic wall-forming device provided with a double-open type valve at the end part thereof is internally pre-hung with a steel reinforcement cage; concrete is filled sequentially, and the wall-forming device is pressed into a preset thickness of soil layer one by one; one of the wall-forming device combination is lifted, and simultaneously a high frequency vibrator installed in a wave-shaped body is started; a reinforced concrete unit wall sections are formed by vibrating and lifting the wall-forming device; and the device and method has novel technology, good environmental protection effect, reliable quality, high bearing capacity, board applicability and short construction period.

The invention discloses a temperature control method and a system of a microwave oven, and the microwave oven. The method comprises the following steps of: collecting a microwave oven temperature in stages; comparing an oven temperature and a set temperature through a (Proportion Integration Differentiation) PID instruction, obtaining a deviation value, carrying out the PID calculation and processing on the deviation value to obtain a corresponding controlled quantity; regulating a power of a microwave source based on the controlled quantity; and controlling a temperature of the microwave oven based on the regulated power output by the microwave source. Temperature control accuracy of the microwave oven is increased, thus, problems of high-cost implementation manner of a PID control method, complicated operation steps, heavy-workload microwave oven and a large quantity of manpower and financial resources wasting in the prior art are solved.

The invention discloses an artificial synthesizing method of training samples and a verification code recognizing method based on the samples. The artificial synthesizing method of the training samples comprises the following steps: S1, generating a verification code lexicon; S2, generating a background photo gallery; S3, screening rectangular background blocks; S4, collecting typeface sets; S5, randomly matching words and expressions with the background blocks; and S6, taking the background blocks which have been written with the words and expressions as samples. The invention further discloses a verification code recognizing method based on the training samples. The verification code recognizing method based on the training samples comprises the following steps: S1, feature extraction; S2, sequence calibration; and S3, correction of recognition results. The training samples are acquired by a mode of synthesizing samples artificially, only recognized character types need to be set, but samples in the corresponding types can be generated, good effect can be achieved by adding a small amount of actual website samples, and a large number of labors and financial resources for sample collection are reduced while the samples are diversified.

This invention relates to the long-distance real-time monitoring the automobile damage identification system based on the internet and the monitoring method. The monitoring method network is the state that waits for the request of online data transmitted by terminals received by internet the terminals receive the request of the damage identification expert and the user, then sends the online request to video server via internet; the damage identification expert control by terminals transmits the image information to the terminals through video server and let damage identification expert and user look at video server storages the image information 005; make multilateral dialogs; conclusion. this invention makes damage identification expert not go to the spot and only stay at home or the monitoring center to monitor automobile damage identification via long-distance real-time video frequency and the privy C can take part in and look at the whole damage identification process.

The invention relates to the technical field of natural language processing, in particular to a knowledge graph construction method which includes the steps: S1, acquiring a corpus set; S2, preprocessing the corpus set; S3, converting a corpus set and storing the corpus set into a database; and S4, constructing a knowledge graph according to the database. Compared with an existing knowledge graphconstruction method, the knowledge graph construction method has the advantage that the quality of the constructed knowledge graph is higher.

The invention discloses a technology for processing bamboo chopsticks. The technology sequentially comprises the following steps: (1) selecting first-class bamboo materials, a varnish, brushes, steel knives and a machining lathe; (2) processing the bamboo materials into rudiment of chopsticks through the machining lathe; and (3) grinding the rudiment of chopsticks into finished products through the steel knives, painting the varnish through the brushes, drying the painted chopsticks and packaging. Resources can be fully utilized, and the resource waste is reduced; and moreover, the whole process flow is simple, manpower and financial resources are saved, and the yield of the products is high.

The invention provides an IP message receiving processing device and processing method. Data message information from an MAC layer is cached by a message receiving module, and meanwhile, the message receiving module controls a receiving speed; after the received data message information with a proper speed is placed in a cache unit, a format processing module reserves a blank header for subsequent processing and adds head and tail information; then, the data is transmitted to a length check module and an error check module to check whether the data message information is correct; the data message information having no error is transmitted to a filling processing module and a decapsulation processing module thereafter at one time, and maximum and minimum packet limit of a network layer are cooperated by these modules; thereafter, the data message information is transmitted to a keyword extraction and lookup module to cooperate with a subsequent routing table entry lookup and result return module to realize a routing algorithm; and finally, a processed IP message is sent to a transport layer by a forwarding module.

The invention relates to a fully automatic ABS gear ring defect detection system based on machine vision. Two working tables on the ground are vertically placed in a right-angle form, and a manipulator and a base are located at the center; detection of gear rings is driven by grabbing of the manipulator and manipulator fixtures, defect detection software of an upper computer is used for cooperation, the type of defects of the ABS gear rings is detected, and the gear rings are placed in different material dropping frames according to the types respectively. The system adopts an automatic mode, can greatly reduce the investment of manpower and financial resources in the detection step, and improves the detection efficiency and the detection success rate.

The invention discloses a ropeless static penetrometer and a method for acquiring and processing data. The ropeless static penetrometer comprises an underground static probing DAC (data acquisition card), a management system of a static probing data upper computer and an underground static probing data acquisition instrument, wherein the management system of the static probing data upper computer is used for processing and displaying data which is acquired by and stored in the underground static probing DAC, and the underground static probing data acquisition instrument is used for uploading the data. The method comprises the following steps: 1, acquiring and processing a signal of an initial detection value of a static prober in real time; 2, acquiring, processing and displaying depth signals of a probe rod and signals output by the underground static probing DAC in real time; 3, uploading the data; and 4, processing and displaying static probing data. The structure is simple, the design is reasonable, the operation is convenient and quick, the data memory space is large, the storage time is long, the continuous working time is long, the reliability is high, the working efficiency is high, the data processing capacity is strong, the use efficiency is good, and the promotion and application are convenient.

The invention discloses a visual mobile multi-parameter hazardous gas detection device, which comprises a mobile vehicle body, a lifting device, a gas detection device, a video recording device and a master control device. Furthermore, the mobile vehicle body comprises a vehicle body control device and the video recording device, and the vehicle body control device is connected with a power drive device and a steering engine; the lifting device comprises a lifting control device, an EEPROM (Electrically Erasable Programmable Read-Only Memory) algorithm program module, the power drive device, a lifting step motor and a lifting frame; and the gas detection device comprises a detection control device, an alarm device and an A / D (Analog / Digital) converter, the A / D converter is electrically connected with a sensor array module, and the sensor array module is connected with a gas detection sensor. The visual mobile multi-parameter hazardous gas detection device comprises a plurality of gas detection sensors, and can simultaneously detect various hazardous gases; and the technician can choose to detect the provided detection items as needed in the field, thus the detection efficiency is improved greatly.

The invention provides a positioning method and device for a pseudo base station, and relates to the technical field of communication safety. The positioning method for the pseudo base station comprises the following steps: periodically acquiring signaling bill data of a plurality of cells; acquiring cells with abnormal location update according to the signaling bill data of the plurality of cells within the same statistical cycle; performing a clustering treatment on the cells with abnormal location update, and obtaining a plurality of cell clusters; and determining the position of the pseudo base station of each cell cluster according to the positions of the plurality of cells in each cell cluster and the location update abnormal condition. The positioning method obtains the cells with abnormal location update by analyzing the signaling bill data of the plurality of cells, clusters the cells affected by the same pseudo base station, and quickly positions the pseudo base station; on one hand, the quick positioning of the pseudo base station can be realized in terms of time; on the other hand, the positioning precision and accuracy can be improved in terms of space; therefore, the search range of capture work is reduced, the capture efficiency of the pseudo base station is improved, and a lot of manpower and financial resources are saved.

The invention relates to a preparation method of a dry-method microwave composite medium board. The method comprises the following operation steps that 1, a coupling agent, hydrolysis solvent and micron ceramic powder are mixed for ball-milling; 2, modified ceramic powder, teflon micropowder and a fluororesin modifying agent are evenly mixed, and drying and ball-milling are conducted; 3, a dry-method mixture is subjected to mould pressing through a mould to obtain a primary blank; 4, sintering is conducted to obtain a clavillose blank; 5, the clavillose blank is made into smooth even rectangular sheets with the thickness smaller than 0.1 mm through mechanical processing; 6, the front and back surfaces of the rectangular sheets are subjected to plasma activation treatment; 7, each activatedsheet and pure PTFE thin film are overlapped, matched and regarded as a layer of basic unit material, the multiple layers of basic unit materials are overlapped in sequence until the thickness required by the design is reached, then a composite basic board is obtained, metal foil is added to the two side surfaces respectively, and through high-temperature vacuum lamination, the PTFE-based microwave composite medium board is prepared. According to the method, in the preparation process, waste gas collection and treatment are not needed basically, so that the method is green and energy-saving,and the environment-friendly requirements are met.

The invention provides an electrode wire diameter on-line automatic detection and compensation system during linear cutting, which comprises a data acquiring device, a movement controlling and executing device, an error value analog input device and a linear cutting numerical control system. The movement controlling and executing device conveys the data acquiring device to a testing point for multiple measurement to acquire an average value; the average value is compared with the initial diameter of the electrode wire to acquire a compensation value; the compensation value is converted into a keyboard signal to be fed back to the linear cutting numerical control system through keyboard data conversion circuit in the error value analog input device; and a linear cutting machine controls a linear cutting machine again for compensation cutting after receiving the keyboard signal. Due to the adoption of the new electrode wire automatic detection and compensation method, the system has the advantages of realizing automatic compensation and zero-labor participation, and saving manpower and financial resource, and also has the advantages of practical data processing method, simple circuit, reasonable structure, low cost, stability and reliability and high compensation precision.

The invention provides a level crossing intelligent guiding system and method based on deep learning, and the system comprises a vehicle and pedestrian target detection module which is used for detecting vehicles and pedestrian target of each channel crossing through a deep learning convolution neural network; a target tracking trajectory extraction module used for re-identifying the vehicles andpedestrian targets through the re-identification convolutional neural network so as to obtain trajectories of the vehicles and pedestrian targets; a motion direction conflict judging module used forobtaining the motion directions of the vehicles and pedestrian targets according to the track and judging whether the motion directions of the vehicle and pedestrian targets at different passage intersections conflict or not; and an automatic early warning information pushing module used for sending out an alarm prompt when a conflict occurs. According to the invention, vehicles and pedestrians can be automatically guided to adopt reasonable passing strategies, and traffic safety and passing efficiency are improved.

The invention discloses an intelligent echometer which comprises a signal acquisition device, a signal receiving and processing device, a remote diagnosis and treatment unit, an electronic medical information unit, a display device and a smartphone connecting terminal, wherein the signal acquisition device comprises an auscultation head, a signal acquisition unit, a storage unit and a peripheral driving circuit; the electronic medical information unit is internally provided with an intelligent terminal and a central server; the remote diagnosis and treatment unit comprises a inquisition terminal connected with the electronic medical information unit and at least one specialist terminal; the auscultation head is externally provided with an infrared temperature sensor. The signal receiving and processing device in the intelligent echometer is capable of performing primary diagnosis on illness state, or a doctor utilizes the remote diagnosis and treatment unit and body temperature detection data to perform diagnosis so as to obtain illness state conclusion, so that medical resources are effectively integrated, the patient can perform primary diagnosis on the illness state at home, and a lot of manpower and financial resources can be saved.

The invention relates to an offshore type automatic system for deep sea aquaculture net cages, and belongs to the technical field of marine fishery aquaculture. The offshore type automatic system for the deep sea aquaculture net cages overcomes the defects of manual operation in traditional deep sea net cage aquaculture and mainly comprises a deep water net cage managing mechanism, a floating wireless transmitting and receiving mechanism and a platform managing mechanism, wherein the deep water net cage managing mechanism is connected with the floating wireless transmitting and receiving mechanism through underwater cables, and the floating wireless transmitting and receiving mechanism is connected with the platform managing mechanism through wireless communication. The offshore type automatic system for the deep sea aquaculture net cages achieves the purposes of intensification, industrialization, mass production and automation of the deep sea fishery aquaculture, greatly improves aquaculture quality and lowers aquaculture cost.

The invention relates to the technical field of landscape greening, and provides a method for protecting the trunks of transplanted trees. The method includes the following steps: the growth information of the transplanted trees is acquired; mixed substratum and aqueous solution are mixed, so that slime is prepared, and the mixed substratum consists of soil, organic matter and controlled-release compound fertilizer; the prepared slime is applied on the trunks of the transplanted trees from the bottom to the top; the trucks with the slime are wrapped by multiple layers of mulching films, consequently, the trunks can be effectively prevented from being directly irradiated by intense light and blown by dry wind, the evaporated moisture of the trunks can be reduced, so that the trunks can be kept wet, meanwhile, inorganic salt and plant growth regulator can be effectively replenished, the survival rate of the transplanted trees can be increased, and tree resources, manpower and financial resources can be saved.

The invention discloses a mechanical stirring and clarifying pond. The mechanical stirring and clarifying pond comprises a clarifying pond, wherein a residue collecting hole is formed in the bottom ofthe inner wall of the clarifying pond; a residue collecting pipe is fixedly connected to the inner part of the residue collecting hole; a valve is fixedly connected to the outer wall of the residue collecting pipe; a suction pump is fixedly connected to the bottom of the residue collecting pipe; a mud discharging pipe is fixedly connected to the top of the suction pump; supporting rods are fixedly connected to the bottom of the inner wall of the clarifying pond; and a motor tank is fixedly connected to the tops of the supporting rods. According to the mechanical stirring and clarifying pond disclosed by the invention, a scraping plate is arranged at the bottoms of the stirring rods, so that water currents can be effectively stirred, and mud and residues are promoted to circulate; solid impurities in water and the formed mud and the formed residues are in contact to flocculate to be separated and precipitated; and when the water currents are clarified and upper-layer clean water currents are drained through a through groove, the scraping plate is used for scraping sludge precipitated at the bottom of the inner wall of the clarifying pond, and the sludge is collected into the residue collecting hole, so that the cleaning of the clarifying pond is simple and convenient, and human resources and financial resources are saved.

The invention discloses enhanced anti-cracking self-repairing concrete and a preparation method thereof, and relates to the technical field of building materials. The concrete is C30 concrete and comprises, by weight, 154-164 parts of cement, 36-44 parts of fly ash, 262-290 parts of fine aggregates, 613-677 parts of coarse aggregates, 41.8-46.2 parts of water, 1.6-2.2 parts of fibers, 7.6-16.8 parts of repairing agents and 18-20 parts of anti-cracking anti-seepage agents. The concrete improves crack resistance and can effectively restrain cracking and continuously and automatically repair micro-cracks or micro-damage of the concrete caused by various reasons, the mechanical property of the concrete before being damaged can be recovered, economy and durability of the concrete are improved,and the service life of the concrete is prolonged.

The invention relates to the field of garbage bins of urban infrastructure construction, in particular to an urban multifunctional garbage collection bin. The urban multifunctional garbage collection bin comprises a bin body. Two garbage cans are arranged in the bin body. The urban multifunctional garbage collection bin further comprises a human body infrared induction module used for detecting whether human bodies approach or not, an MCU control panel used for controlling a stepping motor to act and transmitting a signal that the garbage cans are filled with garbage, the stepping motor driving the garbage cans to be opened and closed, a garbage can detecting module used for detecting whether the garbage cans are filled with garbage or not, an android mainboard connected to the network, a liquid crystal display used for playing display information pushed by the network, and a voice player used for playing voice information pushed by the network. The problems that traditional garbage cans are simplex in form and structure, cannot well play the classified collection function and are unreasonable in garbage can placement position, size and shape design, and garbage are picked up and rummaged are solved, and the urban multifunctional garbage collection bin has the dual functions of environment beautifying and information providing, and conforms to the directions of urban management optimizing and hygienic civilized city development promotion.

The invention relates to an anticorrosion flexible guardrail which comprises a guardrail plate, a stand column and an obstruction block. The guardrail plate is formed by compositing a flexible outer layer and a support core layer; the stand column is formed by compositing the flexible outer layer and a middle support layer, the flexible outer layer of the guardrail plate is made of ultra-high molecular weight polyethylene or modified ultra-high molecular weight polyethylene, and the support core layer of the guardrail plate adopts an aramid belt or steel wire mesh; the flexible outer layer of the stand column is made of ultra-high molecular weight polyethylene or modified ultra-high molecular weight polyethylene, and the middle support layer of the stand column adopts a steel plate mesh. According to the anticorrosion flexible guardrail, the flexible guardrail plate, the stand column and the obstruction block are subjected to primary shaping through coextrusion by adopting modified ultra-high molecular weight polyethylene and the steel wire mesh or the aramid belt, the flexible outer layer of the flexible guardrail plate and the flexible outer layer of the stand column can absorb collision energy and reduce or even avoid secondary damage.

The invention discloses a microwave copper-clad plate preparation method capable of keeping a low thermal expansion coefficient in three axes at the same time. By means of the method, a low thermal expansion coefficient of a dielectric plate can be kept in the X axis, the Y axis and the Z axis at the same time. The method includes the following steps that 1, bonding sheets are prepared, wherein fluororesin is added into PTFE emulsion for modification, and mixed ceramic powder / particles, reinforced fibers and a surface modifier are added; then the mixture is diluted into several parts of bonding sheet solutions with different concentrations with deionized water, and the bonding sheet solutions are stirred to be uniform; PTFE porous films are dipped into the uniform bonding sheet solutions with different concentrations, and dipping sheets are adjusted to have a preset thickness; moisture and low-temperature volatile matter on the dipped porous films are removed, drying is carried out to achieve film formation of the fluororesin, and the uniform-thickness bonding sheets with smooth surfaces are obtained; 2, the bonding sheets obtained in the step 1 are overlapped, the number of layers of the bonding sheets is controlled according to the requirement for the thickness of the copper-clad plate, metal foil is placed on the upper layer and the lower layer, and vacuum lamination is carried out.