30results about How to "Stable recovery" patented technology

The invention provides a pressure swing adsorption control method, a pressure swing adsorption control device and a pressure swing adsorption control system. The method comprises the steps that a hydrogen purity difference value is obtained, and the hydrogen purity difference value is the difference value between actual hydrogen purity and target hydrogen purity; determining target pressure swing adsorption time by adopting an APC algorithm and an RTO algorithm at least according to the hydrogen purity difference value; and controlling the pressure swing adsorption device to operate according to the target pressure swing adsorption time. According to the scheme, the problems of low product gas purity and unstable yield caused by low accuracy rate of pressure swing adsorption time in the prior art are solved.

The invention discloses a method and a system for recovering power supply of a power distribution network after a fault. The method comprises the following steps: reconstructing to obtain a reconstructed topology network of a target power distribution network; acquiring real-time voltage response data of the reconstruction topology network for continuously changing power simulation, and calculating voltage sensitivity among nodes; modeling the acquired data to obtain a power supply recovery model; operating the power supply recovery model to obtain optimal power supply power-time curve data corresponding to each power resource unit; and controlling each power resource unit to perform power supply recovery on the target power distribution network after the fault according to the corresponding optimal power supply power-time curve data. According to the method, the power supply output time curve of each different-flexibility output power resource under the condition that the power supply recovery model gives consideration to the recovery speed and the voltage recovery stability is acquired, so that the power recovery resources can be utilized more fully and reasonably, the power fluctuation in the recovery process is balanced, and stable recovery and operation of the power distribution network are ensured.

The invention relates to the technical field of obstacle crossing wheels, and discloses an obstacle crossing wheel and a wheel type inspection robot, the obstacle crossing wheel comprises a wheel axle, one end of the wheel axle is detachably connected with a hub, the outer wall of the hub is fixedly connected with three connecting rods arranged at equal intervals, the end, away from the hub, of each connecting rod is rotatably connected with a wheel plate, and the two ends of each wheel plate are connected in sequence; a connecting groove is formed in one side of the inner wall of the wheel plate, a positioning shaft is fixedly connected in the connecting groove, the connecting rod is rotationally connected with the positioning shaft, two connecting plates are fixedly connected to one end of the wheel plate, a connecting shaft is fixedly connected between the two connecting plates, and a deformation rod is rotationally connected to the outer wall of the connecting shaft. According to the obstacle crossing wheel and the wheel type inspection robot, the deformation function of the whole obstacle crossing wheel is achieved through mutual cooperation of the deformation track and the moving ball, and therefore the stable and efficient obstacle crossing capacity is provided for the robot, and the problems of noise, vibration, faults and the like caused by gear abrasion are avoided.

The invention relates to the technical field of mineral flotation, and discloses a method for compounding a lithium oxide collecting agent in a low-temperature environment, and the lithium collecting agent comprises the following compounding raw materials in percentage by mass: 15-25% of palmitic acid soap; 10%-20% of sulfonated petroleum; 5% to 10% of iso-tridecanol polyoxyethylene ether; 8%-15% of fatty alcohol-polyoxyethylene ether; 3%-8% of polyoxyethylene ether sodium sulfonate; 5%-10% of dipropylene glycol monomethyl ether; 8%-15% of sodium carbonate; 2%-5% of sodium hydroxide; 0.5%-2.0% of sodium fluoride; 0.5%-2.0% of aluminum sulfate; 1%-4% of tannic acid; a synergistic surfactant system is formed by constructing palmitic soap and sulfonated petroleum as a main collecting frame and compounding isomeric alcohol ether, fatty alcohol-polyoxyethylene ether and polyoxyethylene ether sodium sulfonate, dipropylene glycol monomethyl ether is introduced as a low-temperature mutual solvent, and the low-temperature mutual solvent is used for collecting the high-temperature-resistant oil-displacing agent for the oil-displacing oil-displacing agent for the oil-displacing oil-displacing oil-displacing oil-displacing oil-displacing oil-displacing oil-displacing oil. The freezing point and viscosity of a collecting agent system are greatly reduced, the liquidity, uniformity and dispersion stability of the collecting agent are still kept when the collecting agent is used in the low-temperature environment of 0-15 DEG C, and the failure problem caused by low-temperature solidification or layering is fundamentally avoided.

The traumatic shoulder abduction rehabilitation assembly comprises a shoulder abduction rehabilitation bag and an arm sleeve assembly, the shoulder abduction rehabilitation bag comprises a first face and a second face connected to the first face, the first face is used for being arranged on the armpit thoracic portion of the injured side of a human body, and at least part of the first face is in an arc shape; the arm sleeve assembly comprises an arm sleeve body and a first fixing band arranged on the arm sleeve body, the arm sleeve body defines a containing space, the containing space is used for containing the arm of the human body, and the first fixing band is used for fixing the arm sleeve body to the human body. When the traumatic shoulder abduction rehabilitation assembly is worn, the shoulder joint of the injured arm of a patient can naturally and slightly expand outwards and rotate inwards and outwards to be neutral, shoulder joint muscles are in a relaxed state, the possibility that the injured arm of the patient moves or shakes in the upright position or the lying position is reduced, and stable recovery of the patient in the rehabilitation period is facilitated.

The separation equipment for the blended fabric comprises a plurality of devices and pipelines. The cloth decomposing device contains a solvent, so that the blended cloth is decomposed into polyester and cellulose in the solvent. The first pipeline conveys a first mixed solution output by the cloth decomposing device, and the first mixed solution comprises a solvent and cellulose. The cellulose separation device separates a solvent and cellulose. The cellulose recovery device recovers cellulose. The second pipeline is used for conveying a second mixed solution output by the cellulose separation device, and the second mixed solution comprises a solvent and cellulose which is not separated. And the cellulose filtering device is used for separating the solvent and cellulose in the second mixed solution. The third pipeline conveys a third mixed solution separated by the cellulose filtering device into the cellulose separating device, and the third mixed solution at least comprises cellulose. And the solvent recovery device recovers the solvent separated by the cellulose filtering device. The separation equipment for the blended fabric is a normal-temperature one-step separation and recovery system, and can be used for stably separating the blended fabric and recovering the medicament, so that circular economy and environmental protection value are realized.

The invention relates to the technical field of automatic control of high-temperature reactors, and discloses a main steam pressure control device and method under an emergency shutdown condition of a high-temperature gas cooled reactor, which are applied to a steam turbine control system with one machine in two reactors. The device is characterized in that a total valve position reference value output module corresponding to shut-down power calculates a total valve position reference value corresponding to the shut-down power in a voltage control mode; the band rate output module generates a feed-forward value for the pressure controller based on the value. The pressure controller outputs a pressure control value based on a preset pressure set value, a pressure actual value and a feedforward value; the pressure control trigger module switches the valve control mode into the pressure control mode when emergency shutdown occurs in the valve control mode or a pressure control button is input; the valve control instruction generation module generates a valve control instruction according to a pressure control value in a pressure control mode or a preset valve position target value in a valve position mode and after an RB action is triggered by emergency shut-down, the valve control instruction generation module is combined with the RB rate, and it can be guaranteed that the fluctuation of the pressure of the steam mother pipe is within the allowable range in the DEH pressure control or valve control mode.

The present application belongs to the technical field of analytical chemistry, plastic detection and regenerated polyester quality control, and particularly relates to a microcoulometric method and system for determining trace PVC content in PET microplastics. After water washing and drying of the PET sample, the method uses a selective solvent mainly composed of tetrahydrofuran to dissolve PVC for a short time and filter and fix the volume, burns the chlorine-containing sample solution under the condition of high temperature, oxygen enrichment and copper-free chlorine-trapping filler, converts chlorine into hydrogen chloride and performs microcoulometric titration, and converts the PVC content according to the electrolytic electric quantity, which has the advantages of rapidness, accuracy, resistance to inorganic chlorine interference and suitability for trace detection.

The invention discloses a particle sorting micro-fluidic chip integrated with a piezoelectric actuator and a use method of the particle sorting micro-fluidic chip, and relates to the technical field of micro-fluidic sorting. The device comprises a particle inlet, a jet liquid inlet, two sorting outlets, a sorting area and a piezoelectric actuator. The jet flow cavity is in fluid communication with the sorting area, and a jet flow outlet of the jet flow cavity is located at the highest gravity position, so that gas in the jet flow cavity can be discharged through the jet flow outlet under the action of gravity. According to the invention, the chip is vertically or obliquely placed, so that the jet flow outlet is located at a functional position which is beneficial to natural gathering and discharging of gas under the action of gravity, and bubbles in the cavity are naturally discharged by utilizing the gravity. The jet flow actuating efficiency is improved, the sorting process has higher tolerance to the initial transverse position, the arrival time sequence and the size fluctuation of the particles, and stable and high-purity particle sorting can be achieved without depending on the high-precision pre-alignment condition.

The application provides a partition method, device and equipment for power system outage recovery and a storage medium. The method comprises the following steps: determining a guarantee area based on the number and capacity of black-start power sources and the starting power of to-be-recovered conventional units and the node load power; including nodes and branches based on the rated power of the to-be-recovered conventional units in the guarantee area to obtain a feasible area; and determining the partition attribution of a new energy station based on the support power provided by the new energy station and the new energy consumption capacity of each partition in the feasible area to obtain an expanded area. The method can improve the execution efficiency of the power system recovery scheme.

This invention discloses a lensless fiber bundle phase imaging method. The method includes: acquiring a single-exposure image of a sample through an optical fiber under multi-wavelength illumination; obtaining light intensity data for reconstruction by multi-channel separation and correction of the image; reconstructing the diffraction image of the sample based on the obtained light intensity data by removing the fiber bundle structure; establishing a lensless fiber bundle imaging model and correlating the diffraction image with the complex amplitude distribution of the sample; constructing an objective function for optimization and solving to obtain the amplitude image and phase image of the sample. This invention eliminates the need for lenses in the fiber bundle, offering advantages such as simple structure and suitability for miniaturized systems, and enables stable quantitative phase imaging under single exposure.

This invention relates to the field of ore flotation technology, specifically a low-consumption, high-efficiency flotation reagent for high-calcium, fine-muddy fluorite ore, its application, and a flotation method. The flotation reagent includes a modifier, a compound depressant, a compound collector, and a frother. The modifier includes sodium carbonate; the compound depressant includes water glass, carboxymethyl starch, sodium hexametaphosphate, and sodium lignosulfonate; the compound collector includes oleic acid, oxidized paraffin soap, sodium dodecyl sulfonate, and benzoyl hydroxamic acid; and the frother includes pine oil. Through the complementary functions of the compound depressant and the compound collector, highly efficient selective inhibition of high-calcium gangue and highly selective collection of fluorite are achieved, effectively dispersing fine mud, reducing froth entrainment, and ultimately obtaining a fluorite concentrate with a stable grade ≥97.0%, meeting the quality requirements of metallurgical and acid-grade fluorite products. This reduces the negative impact of fine nuclei on flotation, stabilizes the fluorite recovery rate, and increases the fluorite recovery rate by 3-6%, achieving dual stability in grade and recovery rate.

The separation method of the blended fabric comprises the following steps: putting the blended fabric and a solvent into a fabric decomposition device, decomposing the blended fabric into polyester and cellulose in the solvent, and mixing the solvent and the cellulose to form a first mixed solution; conveying the first mixed solution into a cellulose separation device to separate the solvent and cellulose in the first mixed solution; collecting the cellulose into a cellulose recovery device; a second mixed solution separated by the cellulose separation device is conveyed into a cellulose filtering device, the second mixed solution comprises a solvent and cellulose, and the solvent and the cellulose in the second mixed solution are separated by the cellulose filtering device; collecting the solvent into a solvent recovery device; and conveying the third mixed solution separated by the cellulose filtering device into a cellulose separation device, wherein the third mixed solution at least comprises cellulose. The separation method of the blended fabric is a normal-temperature and one-step separation and recovery method, the blended fabric can be stably separated, the medicament can be recovered, and circular economy and environmental protection value are realized.

The utility model provides a kind of torpedo tank truck automatic uncovering device, belong to torpedo tank truck heat preservation technical field, comprising: lifting hydraulic cylinder, support seat, installation shell, electro-hydraulic push rod, tank cover structure, guide assembly and compression assembly;Lifting hydraulic cylinder and support seat are all arranged in the side of torpedo tank truck, and the telescopic end of lifting hydraulic cylinder and the top of support seat are respectively connected with installation shell rotation;Electro-hydraulic push rod is equipped in installation shell, and electro-hydraulic push rod is connected with tank cover structure;Guide assembly is set in installation shell, guide assembly is located at the two sides of electro-hydraulic push rod, and is attached with the bottom surface of tank cover structure;The device is used in combination by lifting hydraulic cylinder, support seat and electro-hydraulic push rod, realizes tank cover translation type to uncovering cover operation, need not vertical overturning space to be able to be stably operated in workshop, and tank cover structure is guided and limited by guide assembly and compression assembly, to avoid the risk of tipping caused by gravity center deviation, to ensure the stability of device.

The invention discloses a crack global optimization reconstruction method and system for structure detection. The method comprises the following steps: preprocessing a structure surface image, detecting cracks, and analyzing a connected region to obtain a discrete crack fragment set; extracting geometrical characteristics of each fragment, and calculating a fragment pair space adjacent distance to construct a candidate connection set and a crack connection graph; constructing a feature vector based on the connection probability features, and combining a likelihood model and a structure prior model to form a probability graph model; and after the problem is converted into an energy minimization problem, performing iterative optimization through a maximum posterior probability inference algorithm dynamically updated by a structural state, screening an optimal connection relation set, and combining crack segments to realize global optimization reconstruction. According to the invention, the accuracy and continuity of crack detection in a complex scene can be improved.

The invention relates to the technical field of detection, in particular to a method for detecting arginine / lysine polypeptide in cosmetics and application of the method. The method optimizes a high performance liquid chromatography-tandem mass spectrometry method, has the detection advantages of simple operation, accurate quantification, stable recovery rate, high sensitivity, high precision, strong specificity and high throughput, is suitable for determination of arginine / lysine polypeptide in cosmetics with different matrixes, and can detect the real condition of the product; according to the application, the defects of the existing arginine / lysine polypeptide detection method are overcome, and a quality control basis can be provided for the application of the arginine / lysine polypeptide in cosmetics.

This invention relates to a method for recovering and clustering optical stripes based on restricted region growing, belonging to the field of computer vision measurement technology. The method includes the following steps: Step 1: Obtaining stripe projection images of the object under test after segmentation of the region of interest (ROI) from two camera viewpoints; Step 2: Obtaining binary stripe images; Step 3: Extracting the stripe center lines from the binary stripe images through connected component analysis to obtain the seed point coordinates of each stripe; Step 4: Obtaining stripe point coordinate data; Step 5: Calculating the centroid coordinates of the stripes based on the stripe point coordinate data recovered in Step 4, and numbering the stripes in the left and right views; Step 6: Comparing the number of stripes in the left and right views. If they do not match, the radius of the region growing is increased, and Steps 4 and 5 are repeated until the number of stripes in the left and right views matches. This invention effectively addresses the problems of noise, breakage, and deformation in optical stripe images, avoiding the problem of mismatched multi-line laser stripes.

The application discloses a kind of microbial standard substance preparation methods of characterizing hydrogen peroxide sterilization performance, belong to biological detection technical field, comprising the following steps: S1, raw material selection: including indicating microorganism, carrier, modified chitosan, modified mesoporous nanometer silicon dioxide and tannic acid;S2, preparation composite protective solution: modified chitosan is dissolved in phosphate buffer solution, add tannic acid solution;Again add modified mesoporous nanometer silicon dioxide;S3, preparation spore protection suspension;S4, the inoculation and drying of carrier;S5, packaging and storage;The application solves the problem that microbial standard substance quality value is not accurate, unstable, unreliable in the existing hydrogen peroxide sterilization performance evaluation.

According to the control method of the shower, the shower and the intelligent shower system, wireless communication of signals to the shower is controlled through a remote controller, a user can easily and remotely adjust the water temperature and the water outlet flow and select the water outlet mode, and direct contact with the shower is not needed; under the condition that water is cut off in the showering process, the water pressure of the water inlet path is lower than a preset pressure value, the system can automatically control all the opened electromagnetic valves to be closed by monitoring the water pressure, it is ensured that unnecessary water flow waste is avoided, equipment is protected against damage, and the problem of abnormal water pressure caused by water source interruption is prevented; when the water source recovers, the system monitors the water pressure of the water inlet path in real time and judges whether the water pressure exceeds a preset pressure value or not. After the water pressure is recovered to exceed the preset level, each electromagnetic valve is automatically allowed to be independently opened and closed, stable recovery of water flow is ensured, the situation that a user needs to manually adjust the electromagnetic valves or the water temperature again is avoided, the automation and intelligence of the system are improved, and the operation burden of the user is reduced.

The utility model provides a hole-forming depth detection device for pile foundation drilling, which comprises a measuring rope with scale values, a counter weight connected to one end part of the measuring rope, a bracket arranged above a drilling hole, a fixed pulley rotationally arranged on the bracket, and a fixed frame arranged on the bracket, the fixed pulley is arranged at one end of the measuring rope, the winding drum mechanism is rotationally arranged on the fixed frame and fixedly connected with the other end of the measuring rope, the elastic tightening mechanism is arranged on the winding drum mechanism, and the measuring rope is erected on the fixed pulley. When the heavy hammer drives the measuring rope to fall to the bottom of the formed hole towards the heavy hammer, the resilience force of the coil spring enables the winding drum mechanism not to move any more and the measuring rope is in a tensioned state, at the moment, the length of the thin rope, entering the formed hole, of the measuring rope can obtain the depth of the formed hole, the measuring result is more accurate, and the judgment mode is more visual.

The invention provides a smelting method for low-carbon low-silicon high-titanium special welding. The smelting method comprises the steps of molten iron desulfurization, converter smelting, converter end point component and temperature control and aluminum ingot adding according to the end point oxygen content. Feeding the LF refining furnace into a station, supplying power for a minutes, and adding high-alkalinity refining synthetic slag; b, starting to deoxidize by using calcium carbide after minutes, and carrying out end-point oxygen determination operation; tapping, feeding a low-aluminum low-nitrogen ferrotitanium core-spun yarn, and finally adding ferroboron to start soft blowing operation; and after soft blowing is finished, steel is hoisted for pouring, an integral tank is used for production, and protective casting is well performed in the whole casting process. According to the method, the titanium content can be stably controlled between 0.11% and 0.15%; the silicon content is controlled to be 0.03%, and the carbon content is stably controlled to be 0.07%-0.10%, so that the welding wire is smooth in drawing and good in welding performance; the total oxygen content is controlled within 10 ppm, the castability of the welding wire steel is improved, and the problems that the production process of the steelmaking procedure is unstable, and water gaps of a tundish and a large ladle are blocked and nodulated are successfully solved.

The invention provides a photovoltaic inverter current limiting and fault recovery method based on an adaptive variable angle, belongs to the technical field of photovoltaic power generation, and aims to enhance the transient performance of a photovoltaic inverter grid-connected system by introducing a power angle into a current limiting angle aiming at a power grid voltage symmetric drop fault, and improve the fault recovery efficiency by introducing a voltage controller anti-saturation method. The saturation phenomenon after fault recovery caused by continuous action of the integrator during fault current limiting is avoided, meanwhile, the current limiting recovery compensation method is introduced, the current limiting mode exit time is shortened, and therefore the system can be accelerated to recover the stable state.

This invention discloses a method for detecting bromofenac in ginger, belonging to the field of pesticide residue detection technology. The method includes: homogenizing and extracting ginger samples using an acetonitrile solution containing a hydrophobic deep eutectic solvent; adding a salting-out agent to obtain a supernatant through separation; purifying the supernatant using a boric acid-functionalized magnetic carbon nanotube metal-organic framework composite material as an adsorbent via a temperature-switching adsorption process, first removing phenolic interference through thermal adsorption, then removing lipids through freeze precipitation; and finally detecting the supernatant using liquid chromatography-tandem mass spectrometry. This invention effectively solves the problem of severe matrix interference from phenols and lipids in ginger, and features high recovery rate, low matrix effect, high sensitivity, and simple operation.

This invention discloses a multi-voltage power supply management and control method for mine environmental monitoring, relating to the field of mine power management technology. The method uses a PLC controller to synchronously collect data from the main power supply, backup power supply, auxiliary power supply, transformer, battery management system, and mine environmental parameters. These environmental parameters include at least methane concentration, smoke concentration, temperature, humidity, water level, and ventilation status. Based on the collected data, an environmental risk index and a power demand index are constructed, and the operating status is classified into normal, warning, emergency, and critical levels. This allows for optimal switching between the main, backup, and auxiliary power supply paths. This method enables coordinated control of mine environmental risks and power management, reduces switching impact, ensures continuous online operation of mine monitoring, communication, alarm, and interlocking links, and improves the safety and continuity of mine power supply.

The utility model relates to the field of environment detection, and discloses a multifunctional sampling head suitable for environment detection, which comprises a soil detection frame, a driving motor is fixedly mounted at the top of the soil detection frame, a driving gear is rotatably mounted on an output shaft of the driving motor, and a driving cylinder is fixedly mounted on the inner wall of the soil detection frame. A piston rod on the driving air cylinder is fixedly connected with a soil sampling head used for detecting soil, an annular plate is rotatably installed at the end of the soil detection frame, the outer wall of the annular plate is sleeved with an annular gear, and after soil sampling is completed, in the retraction process of the sampling head, a scraping plate can automatically scrape residual soil on the surface of the sampling head; and the complexity of manual cleaning and the risk of cross contamination are avoided. In addition, the driving motor drives the annular plate and the mud throwing plate to rotate, so that mud on the side edge of the scraping plate can be further removed, the cleanliness of the sampling head is ensured, and a guarantee is provided for next accurate sampling.

The utility model discloses a medical technical field's a kind of for postoperative limb fixator, increase air pump and fixing sleeve, can be bound constraint to limb by fixing sleeve, and by air pump inflation, make limb be oppressed and cannot bend, effectively limit the limb activity of patient, fixing sleeve inflates, to avoid limb bending and affect surgical site healing;Again by the pulling of positioning hook and limiting band, limit limb left and right shift, ensure that limb position remains fixed, more conducive to limb wound recovers as soon as possible, the extension wrinkle of the device can be stretched and extended or superimposed and shortened, and the whole fixing sleeve itself is pasted into a reel by pasting sheet and adjusting patch, can be conveniently adjusted thick and thin, to adapt to the wearing needs of different body type patients.

The invention discloses a method for determining the content of phosphodiesters in phosphate, which comprises the following steps: dissolving a dioctyl phosphate standard substance with a solvent to prepare a series of standard solutions with different concentrations, converting dioctyl phosphate into di (2-ethylhexyl) methyl phosphate through trimethylsilyl diazomethane, and determining the content of the di (2-ethylhexyl) methyl phosphate by adopting a gas chromatography external standard method. Drawing a standard curve; the method comprises the following steps: dissolving a trioctyl phosphate sample with a solvent, adding excessive derivatization reagent trimethylsilyl diazomethane to carry out derivatization reaction, carrying out gas chromatography sample injection detection analysis, and substituting the detected chromatographic peak area into a standard curve to calculate the content of dioctyl phosphate in the sample. The relative standard deviation RSD of the determination result of the method is less than 5%, the precision is high, the analysis and test method is simple, the operation is safe, and the consumed time is short.

The invention relates to a rapid detection method for clofenoxine, ordentine, novaluron, pendimethalin and metalaxyl in aquatic products, which can realize simultaneous detection of five compounds of clofenoxine, ordentine, novaluron, pendimethalin and metalaxyl in aquatic products, and has the advantages of simple, rapid and sensitive detection and good purification effect.

The utility model discloses a miniature relay. The miniature relay comprises a base; the magnetic circuit driving part is mounted on the base and comprises a coil, an iron core, an armature and a push rod; the contact part is installed on the base and comprises a movable spring module and a static spring module, the static spring module comprises a static spring piece and a static contact arranged on the static spring piece, the movable spring module comprises a movable spring piece and a movable contact arranged on the movable spring piece, and the movable spring piece can be pushed by the push rod to generate elastic deformation so as to drive the movable contact and the static contact to be closed; and the elastic sheet structure is installed between the iron core and / or the base, abuts against the armature in the separated state and can limit the armature in the moving direction of the armature when the armature is recovered from the closed state to the separated state. According to the relay provided by the utility model, the mounting position of the armature can be limited, the relay is prevented from shaking during carrying, and meanwhile, the return of the armature can be limited, so that the armature can be stably recovered to a separated state.

The invention relates to the technical field of medical apparatus and instruments, in particular to a demonstration device for promoting mental health in pregnant and puerperal periods, which comprises a bottom plate, a demonstration seat I, a demonstration seat II, a demonstration seat III, a demonstration seat IV, a toothed plate and the like, the teaching device comprises a bottom plate, the bottom plate is an installation carrier of the teaching device, a teaching seat I is installed on the bottom plate, the teaching seat I is used for posting posters or chartlets related to mental health, a teaching seat II is installed in the teaching seat I in a sliding mode, and the teaching seat II is used for interaction of pregnant women. The multi-level extension and storage design from the teaching base I to the teaching base III is adopted, so that the whole device can expand teaching contents of different levels according to needs, meanwhile, the device can be completely stored when not used, space is effectively saved, and the design is convenient to carry and move, and the teaching effect is good. And medical staff can conveniently and flexibly adjust the display range of the teaching content according to actual requirements.