77results about How to "Eliminate damage" patented technology

The invention relates to the technical field of steel bridge deck pavement, in particular to a rivet-free lane-level combined ultra-high-performance concrete pavement structure and a preparation method thereof, and the rivet-free lane-level combined ultra-high-performance concrete pavement structure sequentially comprises a steel panel base layer, a rivet-free composite bonding layer, an unreinforced super-tough cement concrete pavement layer, a shear-resistant bonding layer and a resin concrete functional wearing layer from bottom to top. The ultra-high performance concrete serves as a pavement structure, overall deflection deformation of the bridge deck is reduced, and rigidity reinforcement is achieved. The resin gravel shear-resistant bonding layer effectively enhances the overall synergy and interface safety of the pavement structure through the dual effects of concave-convex surface physical occlusion and interface agent chemical bonding; by adopting the resin concrete functional wearing layer, the pavement flatness and the driving comfort and safety can be effectively improved, meanwhile, through cracks can be prevented from being generated by adopting the upper and lower step seams, and the trapezoidal tongue-and-groove seam structure increases interface bonding to guarantee the durability and usability of construction joints.

The invention discloses a plate cutting device with a positioning mechanism, and belongs to the technical field of plate cutting, the plate cutting device comprises a cutting seat, a plate groove is formed in the top surface of the cutting seat, and a moving groove is formed in the cutting seat; according to the plate cutting device, the four stable walking assemblies are arranged on the two sides of the cutting structure correspondingly, through the design, the whole device is high in adjustability, cutting can be conducted on different positions of an installed plate, meanwhile, in the cutting operation process, the operation stability of the cutting structure can be continuously guaranteed, and meanwhile the stability of a cut material is guaranteed; the situation that redundant vibration is generated in the cutting process of a cutting material is avoided, the flatness of the cutting face of the material is effectively guaranteed, the whole cutter is protected, the cutting accuracy and precision are improved, meanwhile, in the cutting operation process, the two sides of the cutter can be continuously polished, the sharpness of the cutter is continuously guaranteed, and the cutting efficiency is improved. And the practical application effect of the whole equipment is improved.

The utility model relates to the technical field of bucket elevators, in particular to an anti-deviation switch of a bucket elevator. A deviation switch of a bucket elevator comprises a machine shell, a switch is arranged at the upper end of the machine shell, a push piece is arranged on one side of the switch and connected with one end of a spring plate, the other end of the spring plate is connected with a roller carrier through a fixing plate, the roller carrier is connected with a roller, a spring is arranged below the push piece, one end of the spring is connected with the fixing plate, and the other end of the spring is connected with a supporting plate. The supporting plate is fixed to one side of the machine shell. Compared with the prior art, a friction piece at the existing contact end is replaced by the roller, so that the friction with the belt is alleviated, and the damage caused by the dragging of the belt is reduced. In addition, potential damage caused by metal fatigue in the using process is greatly eliminated through the movable spring plate, and the overall reliability of the device is improved.

The invention relates to a liquid floating type anti-shock pressure gauge which is composed of an inner pressure gauge, an outer surface frame, an outer floating frame, an inner floating frame and a pressure regulator. The inner pressure gauge comprises a shell, a pressure sensor, a conversion bridge module, a battery and a pressure data output module; a sealing cover plate is arranged at the front end of the shell; a pressure data output module is attached to the inner side; a pressure driving cavity is formed in the outer surface frame and filled with transfer liquid, and a pressure connector is arranged at the bottom and connected with a pressure source; the outer floating frame is composed of an inner supporting frame and an outer supporting frame, and a buoyancy cavity is formed between the inner supporting frame and the outer supporting frame and filled with buoyancy liquid. The pressure regulator is located on the outer wall of the outer surface frame and comprises a pressure regulating piston assembly and a linear regulating mechanism. The inner floating frame is connected with the inner supporting frame through the elastic connecting rod, the inner meter shell is fixed to the inner floating frame, and the pressure sensor is communicated with the interior of the inner supporting frame.

The invention discloses a processing method of a silicon carbide wafer, which comprises the following steps: carrying out rapid processing, grinding and polishing on the wafer by adopting an annular polishing machine to obtain sub-nanometer level surface roughness; the surface of the wafer is uniformly polished by adopting magneto-rheological polishing, and tiny deep pits on the surface after annular polishing are eliminated or broadened. In order to solve the problems of long processing period, difficulty in processing quality control and the like of the traditional single crystal SiC wafer, the invention provides a novel method for combining magneto-rheological polishing and the traditional polishing technology. According to the invention, the magneto-rheological polishing liquid suitable for polishing the single-crystal SiC is developed, and the single-crystal SiC wafer subjected to ring polishing processing is actually processed, so that the magneto-rheological polishing technology is proved to be capable of eliminating or widening wafer surface defects (such as pocks and pits) on the premise of ensuring the quality of the polished surface, and eliminating the subsurface damage of the wafer. And finally, in combination with a traditional polishing technology, high-precision and high-quality processing of the wafer is realized.

The invention relates to the technical field of multi-core optical fiber automatic alignment, in particular to a multi-core optical fiber alignment method and device based on a fiber core edge, which mainly focuses on a fiber core edge image on an image instead of overall brightness by acquiring the fiber core edge image and performing an edge cross-correlation algorithm through the fiber core edge image. Therefore, even if the welding end face of the multi-core optical fiber has scratches, stains or other damages, the optical fiber can be accurately aligned, and the influence of factors such as damage to the end face of the optical fiber and uneven brightness can be effectively eliminated; on the other hand, the edge cross-correlation algorithm can effectively eliminate common correlation false peaks in a conventional cross-correlation algorithm and reduce misjudgment conditions, and the edge cross-correlation algorithm significantly reduces the occurrence of false peaks and improves the accuracy of optical fiber alignment by extracting the edge features of the image; by accurately aligning the multi-core optical fibers, perfect contact between the end faces of the optical fibers can be ensured, so that loss in signal transmission is reduced, and the service life of an optical fiber system is prolonged.

The invention relates to a 3D printing sand mold cleaning device which is characterized by comprising an automatic sand cleaning room, a roller shutter door arranged at an inlet of the sand cleaning room, an automatic transfer trolley used for bearing and transferring a sand mold, a sand cleaning mechanism, an air supply system and a control unit. The sand cleaning mechanism comprises a plurality of sand cleaning actuators and a driving mechanism used for driving the sand cleaning actuators to do linear movement independently. An automatic sensing device is arranged on each sand cleaning actuator and is used for detecting the distance between the automatic sensing device and the surface of the sand mold in real time in the moving process; the control unit is in signal connection with the driving mechanism, the automatic induction device and the air supply system. The invention further relates to a sand cleaning method for the 3D printing sand mold. According to the scheme, the problem that a traditional automatic sand cleaning device cannot treat sand molds with complex inner cavities, deep cavities or special-shaped structures can be solved.

The utility model provides a pressure sensor riveting device for pressure sensor's shell and base connection fixed, the one end of shell is connected with base, including the top post, drives linear movement through drive assembly, the lateral wall of base and shell junction is provided with the clamping hole, the top post is coaxial with clamping hole, the top post applies pressure to the outside surface of shell, makes shell form the convex block that protrudes inwards, the convex block is clamped with clamping hole. Adopt mechanical riveting to replace high accuracy laser welding, need not to depend on high power laser equipment and precision alignment system, significantly reduce equipment investment and process complexity, solved the problem that traditional full welding led, more fit the working condition characteristics of supermicro sensor low intensity demand.

The present invention discloses a lithium-ion battery welding anomaly detection method and a storage medium, wherein the lithium-ion battery welding anomaly detection method comprises: selecting an energy mode as a welding mode, setting detection welding parameters under the energy mode; inputting a welding qualified interval, wherein the welding qualified interval is a qualified interval of a peak power P or a qualified interval of a welding time t; welding a tab and a battery cell, collecting the peak power P during the welding process, i Or welding time t i ; According to the peak power P i The qualified interval of peak power P can be used to judge whether the battery core is abnormally welded; or the welding time t i The qualified interval of welding time t is used to judge whether the battery core has abnormal welding. The present invention can realize 100% non-destructive online detection, improve the detection efficiency, eliminate the subjectivity and uncontrollability of manual detection, and the damage to the battery core during the detection process; reduce the risk of poorly welded battery cores flowing out, reduce the safety risk of battery cores, and improve production efficiency and product quality.

The utility model discloses a gas treatment device after gas pressure protection and safety pressure relief of an excimer laser, which comprises a rupture disk device (1) with one end capable of being communicated with a resonant cavity of the excimer laser. The other end of the rupture disk device (1) is provided with a one-way safety valve (2) which can be jacked open by working gas leaked from the resonant cavity when a diaphragm (14) of the rupture disk device (1) is ruptured, and the one-way safety valve (2) is connected with an absorption device (3) which can purify the leaked working gas; and the absorption device (3) is provided with an exhaust port (4) capable of exhausting purified gas. According to the utility model, the structure is simple, external air can be prevented from flowing backwards into the excimer laser, the internal gas is kept pure, the discharged gas is absorbed and purified, so that the discharged gas can reach the emission standard, and the harm to workers and the environment is eliminated.

The present invention belongs to the field of automobile production line production, hot melt adhesive pressing and pasting fully automated operation technology, and discloses an automatic timing device, method, equipment and application for pressing hot melt adhesive into the sunroof air outlet. The automatic timing method for pressing hot melt adhesive into the sunroof air outlet includes: installing the air outlet to a designated position, instructing different buttons to start different groups of cylinders, and pressing the sandbags into the air outlet from top to bottom after reaching the designated position; when all the sandbags are pressed to the designated position, the switch is triggered, and all the pressed sandbags return to their positions at the same time after the device starts timing. The present invention saves costs: using its own resources, independent research and development, and independent transformation (reducing construction costs and maintenance costs). The present invention saves time: it saves the operator's quality requirement of 20 seconds of waiting time for pressing the sandbags; the present invention improves safety: it completely eliminates the occupational disease of wrist pain caused by pressing the air outlet; it eliminates the harm to the operator caused by the slipping of sandbags.

The present invention is a core-shell abrasive polishing disc capable of changing the motion state of the abrasive, a preparation method and an application thereof. The abrasive on the polishing disc is a core-shell abrasive, which is composed of an inner layer of abrasive and an outer layer of colloid that wraps the abrasive. During the rough machining process, the core-shell abrasive is evenly solidified in the polishing disc, the matrix has a large holding force on the core-shell abrasive, has a large material removal capacity for the workpiece, and can quickly achieve flattening of the workpiece; according to the machining process, by adding an organic solvent polishing liquid to the surface of the polishing disc, the colloid shell of the core-shell abrasive is dissolved to form pores, and the internal abrasive can move locally freely in the pores to achieve the yield of the abrasive on the workpiece surface, obtain a high-quality machined surface, and avoid the waste of free abrasive. The rough and fine machining process cycle of the workpiece is achieved by adding an organic solvent and trimming the polishing disc, so as to shorten the polishing process and improve the machining efficiency and surface quality.

The present invention provides a dual-power steam turbine, which is composed of a steam turbine and a fuel engine. A heat exchanger is arranged on the fuel engine casing, the engine manifold, the outside of the engine cylinder, or any part of the engine exhaust outlet to convert the engine waste heat into high-pressure steam; the steam turbine air inlet is connected to the high-pressure steam outlet of the heat exchanger and the exhaust port of the fuel engine to form a dual-power steam turbine. The present invention increases the thermal efficiency of the fuel engine to more than 60%, saves more than 20% of fuel, and reduces exhaust emission pollution by more than 60%; it is not only applicable to ground engines but also to sea and air engines; it fundamentally solves the problems of low efficiency, high fuel consumption, and serious pollution of fuel engines; it makes the fuel engine an energy-saving and environmentally friendly engine.

This invention discloses a method for protecting the bottom of trenches in wet etching using a photoresist partial filling process. The method includes: fabricating a trench structure on a predetermined area of ​​the wafer surface using plasma etching; applying photoresist to the entire trench structure and the entire wafer surface using spin coating; performing exposure and development on the entire surface of the wafer covered with photoresist using a photolithography machine without a photomask, thereby removing some of the photoresist on the upper surface of the wafer oxide layer and in the upper region of the trench structure, leaving the remaining photoresist in the trench area in a partially filled state; and removing the exposed oxide layer on the wafer surface, thus protecting the bottom of the trench from damage using the remaining photoresist in the trench area. This invention is applicable to both plasma etching and wet etching, effectively reducing the difficulty, cost, and time of etching processes, achieving low cost and a simple process. It is a novel method for eliminating damage to the bottom of deep trenches by using photoresist filling in deep trenches, suitable for wet etching.

The application relates to the technical field of robot control, and discloses a terminal position dynamic compensation method based on fusion of visual servoing and force feedback, which comprises the following steps: collecting a top view image, segmenting an irregular residual hole contour, and calculating a dynamic alignment center coordinate; then, a reverse conical spiral descending trajectory is generated in combination with a lateral force vector to guide a fiber tail fiber connector into a guide port; in the insertion stage, the curvature radius characteristic of a force-displacement curve resistance peak point is used to determine the authenticity of bottom touching; for the case that the bottom touching is determined to be false, the side projection chord length is used to deduce an under-insertion depth, and a high-frequency micro-oscillation compensation insertion is driven until a real buckle locking feature is captured; the application realizes accurate alignment and reliable positioning of fiber plug-in and plug-out actions under complex working conditions such as shielding and mechanical wear.

The present invention discloses a method for preparing a postoperative wound intelligent healing patch based on nanomaterials, comprising the following steps: S1, preparing a temperature response layer, using PNIPAM and surface-modified zinc oxide nanoparticles for compounding; S2, preparing a pH response layer, compounding chitosan with surface-modified titanium dioxide nanoparticles; S3, preparing a humidity response layer, using PEGDA and silver nanoparticle composite materials to optimize the release of silver ions; S4, assembling each layer layer by layer through electrospinning technology or lamination technology, and combining meta-learning and transfer learning to control process parameters to complete the overall structure preparation of the patch; S5, embedding temperature, pH and humidity sensors to construct a sensor data set; S6, dynamically adjusting the drug release rate and material phase change behavior to achieve accurate response; S7, after the patch is prepared, combining Bayesian and multi-objective evolutionary algorithms to optimize sterilization parameters. The present invention combines nanomaterials with intelligent algorithms to prepare intelligent healing patches and achieve real-time environmental response.

The invention discloses a mold pressing device and method for an optical lens, and belongs to the technical field of optical lens machining. An upper die, a lower die and a temperature control system; the roughness of the working surface of the upper mold is smaller than that of a target lens, and the lower mold is provided with vent holes arranged in an array; after the upper mold and the lower mold are attached, a circumferentially-closed mold pressing cavity is formed in the upper mold and the lower mold. The temperature control system is used for adjusting the temperature of the upper mold and the lower mold so as to indirectly control the temperature in the mold pressing cavity; the roughness of the working surface of the upper die is smaller than that of the target lens, a thermal forming mode is adopted to replace a traditional mechanical grinding machining mode, contact type mechanical friction does not exist in the whole forming process of lens machining, and an optical lens matched with the roughness of the working surface of the upper die can be formed; the introduction of microcracks, lattice damage and residual stress is fundamentally eliminated, the optical uniformity of the lens material is ensured, and the machining precision of the optical lens is effectively improved.

The utility model discloses a track polishing mechanism for railway transportation, which comprises a lifting assembly and is characterized in that the lifting assembly is connected with a transverse moving assembly, and the transverse moving assembly is connected with a polishing assembly; the grinding assembly comprises a grinding head and a first motor, the grinding head is fixed to the lower end of an output shaft of the first motor, the first motor is fixed to the lower side of one end of a moving rod, and the moving rod is fixedly connected with the transverse moving assembly. The utility model relates to the technical field of rail polishing, in particular to a rail polishing mechanism for railway transportation. The rail grinding device can be used for grinding rails.

The invention relates to the technical field of power equipment maintenance, and particularly discloses an oil-immersed transformer cooling fin small copper pipe drainage plugging method, which comprises the following steps: searching cracking oil leakage and conventional plugging treatment positions, and marking the positions as plugging areas; the leaking stoppage area is cleaned; manufacturing a bent copper flow guide pipe, selecting one end of the flow guide pipe as an oil discharge port, and selecting the other end as a root part; a ball valve is installed at an oil discharge outlet of the flow guide pipe; the root of the flow guide pipe is split and tightly attached to the oil seepage face; the root of the flow guide pipe is filled with a rapidly-solidified oil-resistant metal plugging agent, so that leaked oil is drained to the oil discharge outlet through the flow guide pipe, and the plugging area is kept in a pressure relief state; the root of the flow guide pipe is coated with oil-resistant metal leaking stoppage glue; after 7 days, closing the ball valve if the leaking stoppage part is solidified and is well sealed; if the leaking stoppage part runs for 15 days and no oil leakage phenomenon exists, it is determined that leaking stoppage succeeds. According to the invention, the flow guide pipe is used for guiding and discharging insulating oil leaked from small cracks to drain oil pressure of a leaking stoppage surface, so that the problem of leaking stoppage of irregular corners of the cooling fin of the 500kV transformer is solved.

The utility model relates to a shell access live line protection circuit through AC sampling and auxiliary voltage comparison, include: alternating current wiring terminal, its access the alternating current single -phase commercial power, or, alternating current two -phase double -fire line commercial power, or, alternating current three -phase three -fire line commercial power, bridge rectifier circuit, crystal oscillator Y1, inductance coil T1A and relay KJ, and the pin of relay KJ accesses the shell, and the shell is not electrified through the control of relay. The utility model discloses when the customer terminal ground wire access live line, through the protection circuit control relay (normally open) disconnect the connection between the earth and the shell, eliminates the harm of shell electrification to human body.

The utility model discloses an insect capturing gun with high safety belongs to insect capturing tool technical field, including capturing gun main part, one end of capturing gun main part is provided with the gun mouth, has the clamping mechanism on installing the gun mouth, the gun mouth is clamped with extension assembly through the clamping mechanism, one end of extension assembly inserts into the gun mouth, the inner chamber of capturing gun main part is provided with negative pressure mechanism, and the extension assembly that the gun mouth is connected through the clamping mechanism, can effectively lengthen the distance between user and insect, make user more safe when capturing insect, especially suitable for capturing some insects that can have aggressiveness or make people uncomfortable, realize physical capture through negative pressure mechanism simultaneously, avoid the security risk that electric spark triggers, and need not use chemical reagent, completely eliminate the harm of chemical substance to human body and the pollution to air, greatly improve the safety and environmental protection in the use process.

The invention discloses a roselle extraction method, a roselle extract, a food composition, a pharmaceutical composition or a skin care cosmetic containing the roselle extract and application of the roselle extract. The method for extracting the roselle comprises the following steps: providing dried roselle as an extraction raw material; carrying out fine crushing on the extracted raw materials; mixing the finely crushed extraction raw material with an extraction solvent, and carrying out primary extraction; performing ultrasonic extraction on the primary extract of the roselle; and filtering the roselle extract.

The invention belongs to the technical field of preparation methods of collagen peptides, and particularly relates to a preparation method of a collagen peptide for improving facial skin, fish tissues are used as raw materials, and the preparation method comprises the steps of picking and washing, cooking, two-step enzymolysis, filtration, primary ultrafiltration, glycosylation reaction, secondary ultrafiltration, concentration, sterilization, spray drying and sieving. The glycosylation reaction involved in the invention comprises a process of performing glycosylation on a fish collagen peptide crude product by using plant polysaccharide and disaccharide. The collagen peptide prepared by the preparation method disclosed by the invention not only has good oxidation resistance, but also has good water absorption and moisturizing properties, so that the facial skin can be effectively improved.

The utility model provides a foam discharge device for cleaning a water tank, which relates to the technical field of water tank cleaning, and comprises a multi-medium filtering device and a water tank, the water tank is provided with a water return pipeline and a water outlet pipeline, the upper part of the water tank is provided with an exhaust port and a dosing port, and the upper end of one side of the water tank is provided with a direct discharge pipeline. The direct drainage pipeline is obliquely arranged downwards, a gate valve is arranged between the direct drainage pipeline and the water tank, a middle pipeline is further arranged on the direct drainage pipeline, the multi-medium filtering equipment is provided with a drainage port for discharging unqualified water, the middle pipeline is in through connection with the drainage port of the multi-medium filtering equipment, and a water drain valve is arranged on the middle pipeline. And the foam in the water tank cannot overflow from the exhaust port, so that the damage of the alkaline liquid to peripheral equipment is eliminated, the pressure of workers on cleaning the ground and maintaining the peripheral equipment is also reduced, and the use effect is good.

The invention relates to the technical field of floor slabs, in particular to a self-adaptive deformation adjusting support-free damping and sound insulation prefabricated floor slab and an installation method.The self-adaptive deformation adjusting support-free damping and sound insulation prefabricated floor slab comprises a first floor slab body, reinforcing steel bars are arranged in the first floor slab body, angle steel supports are arranged on the side wall of the first floor slab body, and the self-adaptive deformation adjusting support-free damping and sound insulation prefabricated floor slab further comprises elastic pieces arranged at the two ends of the reinforcing steel bars; the foam base plate is arranged between the first floor and the elastic piece; by arranging the prefabricated floor slab, the current situation that a traditional prefabricated floor slab does not have the damping capacity is changed, the capacity of automatically adjusting deformation of the prefabricated floor slab can be improved, the anti-seismic performance is improved, and damage of earthquakes to buildings is reduced; support of a prefabricated floor slab can be omitted, and the construction efficiency is improved; meanwhile, the middle layer of the floor adopts the insulation board and the honeycomb structure, so that the structural strength of the middle layer is ensured, and the sound insulation and heat preservation performance of the floor is improved.

The anti-falling air conditioner air outlet device comprises an air conditioner body, the front face of the air conditioner body is connected with a frame in a clamped mode, an air outlet channel is formed in the air conditioner body, the front face of the frame is connected with a front blocking cover in a clamped mode, the inner wall of the frame is connected with an air blocking plate through a rotating shaft, and the air blocking plate is connected with the self-locking type air guiding plate. A supporting frame is installed in the air conditioner body, an anti-falling adjusting assembly is installed in the supporting frame, and a self-locking assembly is installed on the other side of the supporting frame. According to the anti-falling air conditioner air outlet device with the self-locking type air guide plate, the self-locking assembly adopts the innovative bidirectional clamping structure design, the self-locking assembly is composed of the limiting groove, the spring buckle and the anti-loose gasket, a mechanical locking state is formed, the design can effectively prevent the air guide plate from accidentally rotating, sundries and winged insects are prevented from entering, and the anti-falling air conditioner air outlet device is safe and reliable. And children are prevented from touching by mistake, and the situation of angle deviation or loosening and falling is avoided.

The invention discloses a universal installation system for LED lamps, comprising an installation track, on which a conductive plate and an electronic circuit conversion board are fixedly provided, the two conductive plates are respectively electrically connected to the positive and negative electrodes of a DC constant voltage output power supply provided with a dimmer and an LED lamp provided with a built-in DC driving power supply and installed on the track, the electronic circuit conversion board is provided with a non-polarity positive and negative voltage conversion circuit and a constant current output control circuit which are connected in series with the two conductive plates and the DC driving power supply on the LED lamp, the electronic circuit conversion board is also provided with an IC control circuit connected with the DC driving power supply of the LED lamp and a dimming circuit connected with a dimming interface of the IC control circuit, the dimming circuit and the IC control circuit can finally generate a PWM signal for the LED lamp from the dimming analog voltage output by the dimmer, the invention realizes non-polarity arbitrary installation of the LED lamp and compatibility with a variety of dimming modes, the installation track is easy to install, and the entire set of tracks is continuously illuminated.

The invention relates to a motor vehicle lock assembly, in particular a motor vehicle hatch lock assembly, which is equipped with a mechanical module (1) and an electrical module (2). The mechanical module (1) has at least one locking device (3, 4) and a lock housing (5). Furthermore, the electrical module (2) is equipped with at least one electrical component carrier (6) and at least one electrical / electronic component (7) arranged on or on the electrical component carrier. The electrical module (2) can be fastened to a lock housing (5) of the mechanical module (1). According to the invention, a locking lug (6a) of an electrical component carrier (6) of the electrical module (2) engages in a corresponding locking recess (5a) of a lock housing (5) of the mechanical module (1) in a releasable and electrically non-connectable manner during the pivoting movement.

The invention relates to a multifunctional deformation measuring device and a measuring method, belonging to the technical field of thermal deformation measurement; the multifunctional deformation measuring device is manufactured; a test piece is marked; the accuracy of a measuring system is calibrated using a reference standard; a temperature sensor is installed on a test platform; a vacuum treatment is performed by a vacuum system; temperature is controlled by a temperature precision control module; a thermal radiation boundary is formed; the viewing angle and focal length of a measuring camera are adjusted; a monochromatic illumination light source is adjusted to achieve light coverage of the test piece; a speckle is sprayed on the test piece; an initial state of the test piece is measured; temperature is controlled by a temperature precision control module; and the deformation of the test piece at each temperature point during the entire test process is tested and recorded; the invention can solve the problems that the traditional method is limited to material-level samples in measuring test pieces, the applicable scope of measurement environment simulation is small, and the measurement error is large, so as to ensure high-precision measurement of thermal deformation of large-size composite material structures of spacecraft.