76results about How to "Achieve inversion" patented technology

The invention discloses an electromagnetic resonance type wireless charging device and a control method based on CLL resonant transformation. The control method comprises the steps that a DC-bus voltage is acquired by a microcontroller, and the microcontroller controls the duty ratio of an MOS tube of a two-way AC/DC rectifier module, so that the stability of the input DC-bus voltage is achieved; through controlling the switching of the MOS tube of a CLL resonant conversion module, the microcontroller can inverts a direct current into an alternating current; a coupling resonance coil of a transmitting terminal sends out contravariant energy of the CLL resonant conversion module and transmits to a coupling resonance coil of a receiving terminal; after a high-frequency alternating current is received by the coupling resonance coil of the receiving terminal, rectification is conducted by an AC/DC rectifier module of the receiving terminal, stable voltage smoothing is conducted, and the coupling resonance coil of the receiving terminal conducts charging on a storage battery; a terminal voltage and a charging current of the storage battery are acquired by the microcontroller, and the duty ratio of the MOS tube of the CLL resonant conversion module is controlled by the microcontroller, so that the set charging current and the over-charge protection function are achieved. The electromagnetic resonance type wireless charging device and the control method based on the CLL resonant transformation has the advantages that working under the switching of zero voltage and zero current is achieved, the switching loss is effectively reduced, the energy transmitting efficiency is improved, and the volume of a wireless transmission device is reduced.

The invention discloses an environmental satellite 1-based surface temperature single-window inversion method. The method comprises the following steps of: 1, acquiring remote sensing data of an environmental satellite 1B, namely an HJ-1B satellite, of the surface of a region to be tested, preprocessing the remote sensing data to acquire image data and converting a pixel brightness digital number (DN) value of the image data into radiance; 2, performing atmospheric correction on the image data by using an image-based continental offshore stratigraphic test (COST) atmospheric correction model; 3, estimating emissivity epsilon of the surface of the region to be tested by a normalized difference vegetation index (NDVI) threshold method; and 4, inverting the surface temperature by a single-window algorithm according to calculation results obtained in the steps 1 to 3. In the method, the image-based COST model atmospheric correction method and the surface temperature single-window algorithm with no need of an atmospheric water vapor content parameter are applied to the HJ-1B satellite remote sensing data, so that the inversion of the surface temperature is realized.

The invention discloses a novel two-stage bidirectional energy storage converter control system and a control method thereof. An energy storage converter main circuit mainly comprises a three-phase voltage type PWM (Pulse Width Modulation) rectifier, a novel half bridge three-level push-pull bidirectional DC-DC converter, a charging-discharging buffer interface circuit for limiting battery charging current, and a battery pack module. A control system circuit mainly comprises a voltage and current sensor, a driving circuit, a protection circuit, a main controller, an SOC (State of Charge) detection module, a radiator, a buzzer, a man-machine interface, a communication interface circuit and a system auxiliary power supply. The alternating-current micro-grid power or voltage and the states of charge of energy storage batteries can be detected in real time, so that the running modes of each generating set and the energy storage converter in a micro-grid system are controlled flexibly, and the effects of 'filling peaks and clipping valleys' in a power system, smoothening power in a wind-solar hybrid micro-grid system and the like are achieved. Moreover, the control system has the advantages of high power density, small size, high efficiency, low harmonic content, high reliability, high self-control degree and the like.

The invention relates to a D-TDI (digital time-delay and integration) controller for a color plane array CMOS (complementary metal-oxide-semiconductor transistor) sensor. A serial-parallel conversion module of the controller converts serial image data output by the color planar array CMOS sensor into parallel image data streams; a spectral-range separation module carries out separation on image data in odd-numbered rows and image data in even-numbered rows in parallel image data; a RG stream accumulator and a GB stream accumulator respectively carry out time delay and accumulative integration on the image data in the odd-numbered rows and the image data in the even-numbered rows, and a D-TDI integration result is output; and a spectral-range synthesis module carries out channel multiplexing on the D-TDI integration result at RG and GB spectral ranges so as to generate a Bayer-type color image. According to the invention, the odd-numbered rows and even-numbered rows of a CMOS image are processed respectively through two parallel channels so as to complete the D-TDI (digital time-delay and integration) of a RG channel and a GB channel, so that any even-numbered-level time delay and integration of a color CMOS chip can be realized.

The invention discloses a mine storage battery electric locomotive mounted charging and driving integrated circuit structure. The structure mainly comprises a storage battery, a supercapacitor, a first DC-DC converter, a second DC-DC converter, an inverter circuit and a driving motor; one end of the first DC-DC converter is connected with the storage battery in series, the other end of the first DC-DC converter is connected with the inverter circuit in parallel, one end of the second DC-DC converter is connected with the supercapacitor in series, the other end of the second DC-DC converter isconnected with the inverter circuit in parallel, and the output end of the inverter circuit is connected with the driving motor in series. When a mine storage battery electric locomotive is in the traction driving state, the storage battery and the supercapacitor supply power to the electric locomotive; when the mine storage battery electric locomotive is in the parking charging mode, the drivingmotor and the inverter circuit form a charging circuit of the electric locomotive. The problem that mine storage battery electric locomotive offline charging equipment is huge and low in charging efficiency is solved, and the mine electric locomotive charging and operation efficiency can be improved.

The invention discloses a method and apparatus for determining a surface temperature by use of middle-infrared remote sensing data. The method comprises the following steps: step A, determining surface bidirectional reflectivity of a twenty-second channel (3.929[mu]m to 3.989[mu]m) and a twenty-third channel (4.020[mu]m to 4.080[mu]m) by use of radiation brightness data and atmosphere parameter data of the twenty-second channel and the twenty-third channel of a middle-infrared wave spectrum zone of moderate-resolution imaging spectroradiometer (MODIS) data through a developed middle-infrared surface bidirectional reflectivity remote sensing inversion method; step B, by use of the surface bidirectional reflectivity obtained from the step A, through a developed surface direction ratio radiant ratio remote sensing inversion method, determining surface direction ratio radiance; and step C, by use of the middle-infrared surface bidirectional reflectivity and the direction ratio radiance respectively obtained from the step A and the step B, through a developed surface temperature remote sensing reversion method, determining the surface temperature. The method and apparatus provided by the invention effectively realize quantitative remote sensing inversion of the surface temperature through the middle-infrared data.

The invention provides a three-degree-of-freedom parallel mechanism ankle joint recovery device, and belongs to the technical field of recovery engineering. The three-degree-of-freedom parallel mechanism ankle joint recovery device comprises a pedal, an L-shaped connection plate, a U-shaped connection plate, a supporting rod, a slide block, a guide rail, a support, a supporting seat, a bottom plate and three branched chains. Rotation pairs are formed between the pedal and the L-shaped connection plate, between the L-shaped connection plate and the U-shaped connection plate as well as between the U-shaped connection plate and the support. The first branched chain and the second branched chain are connected with the pedal through spherical hinges, and connected with the bottom plate throughhooke joints; the third branched chain is connected with the U-shaped connection plate through one rotation pair, and connected with the bottom plate through another rotation pair. The first branchedchain, the second branched chain and the third branched chain form a spatial parallel mechanism which has three rotation degrees of freedom. The three-degree-of-freedom parallel mechanism ankle jointrecovery device is good in rigidity and high in bearing capability, can achieve adjustment of altitude and angles, conforms to the human body structure, can meet the movement requirements of the anklejoint, and has important effects on recovery of the ankle joint.

The invention discloses a method for inverting the electromagnetic situation of a complex environment based on multiple sensors, which is mainly used to solve the problem that a huge quantity of sensing equipment is required and the accuracy of electromagnetic situation inversion is low in the prior art. The technical scheme includes the following steps: (1) determining and configuring the parameters of a complex electromagnetic environment; (2) constructing a sensor position matrix; (3) constructing a path loss matrix; (4) carrying out radiation source identification according to the sensor position matrix and the path loss matrix to obtain the positions and radiation power of radiation sources; and (5) carrying out electromagnetic situation inversion according to the radiation sources identified to get the electromagnetic situation of each point. Under the condition that the positions of a few sensors are randomly distributed and the positions and radiation power of the radiation sources are randomly distributed, radiation source identification can be realized, and electromagnetic situation inversion can be realized. The method can be used in complex environment electromagnetic situation inversion based on multiple sensors.

The invention discloses a conformal compressing tool of a wing wallboard, and belongs to the technical field of digital aircraft assembly. The conformal compressing tool comprises a conformal frame, the conformal frame comprises a supporting frame, wallboard connecting parts and a wallboard compressing part, wherein the wallboard connecting part and the wallboard compressing part are installed onthe supporting frame, the face, where the wallboard compressing part exerts pressure, of a wallboard is a curved face adaptive to the face of a pressure bearing plate of the wallboard; the two or morewallboard connecting parts are arrayed in the wallboard heading at intervals; a pushing and pressing mechanism is arranged between the wallboard compressing part and the supporting frame and used forforcing the wallboard compressing part to move relative to the supporting frame and compressing the wallboard. The conformal tool is connected with the wallboard, not only wallboard rigidity can be improved, the wallboard and a wing rib skeleton can be compressed to improve the wallboard installing efficiency and quality, and the conformal compressing tool can be widely applied to the aircraft manufacturing field.

The invention provides a determination and analysis method for a three-layer S-RVoG (sloped random volume over ground) scattering model of an inclined forest area. The invention comprises the following steps that: S1, showing a schematic RVoG model scattering diagram, and focusing on the deducing and the analyzing of a coherence coefficient expression of an RVoG model; S2, increasing the scattering component of a trunk layer, and deducing a coherence expression of a three-layer scattering model in detail, based on the RVoG model; S3, considering the influence of local terrain slopes, modifyinga vertical structure function, deducing an S-RVoG model, and analyzing the model; and S4, considering the scattering component of the trunk layer, deducing a three-layer S-RVoG model, and analyzing the influence of each physical parameter on coherence, based on the S-RVoG model. The determination and analysis method solves the problem that the RVoG model is fuzzy in the description of the naturalmountain area scattering process, improves the vegetation coherence scattering model, and improves the accuracy of the polarimetric SAR interferometry vegetation in height inversion.

A rock burst/rock explosion analog simulation energy storage-time tank device belongs to the technical field of geotechnical engineering. By adopting the device, the study on the mechanism of rock burst/rock explosion can have breakthrough, the characteristics of energy and time factors which cause the rock burst are considered, and an elastic energy accumulating process can be recorded, and the time required by elastic energy releasing can be recorded. The lower ends of four long rigid rods and four short rigid rods of an extensometer are respectively connected with a strain gage, the lower ends of the four long rigid rods and the lower ends of the four short rigid rods of the extensometer are respectively fixed into an extensometer placement tank of a lower rigid pressing plate, the upper ends of the four long rigid rods of the extensometer are in contact with a 45-degree chuck arranged at the lower end of the upper rigid pressing plate; screw holes of the side wall of the four short rigid rods of the extensometer are in threaded connection with screws; an upper energy storage-time tank and a lower energy storage-time tank are respectively connected with an upper pressure sensor and a lower pressure sensor, and the upper pressure sensor and the lower pressure sensor are respectively connected with piston rods of an upper load cylinder and a lower load cylinder. The device is used for rock burst/ rock explosion analog simulation experiments.

The invention provides a method using a dipole moment model to inverse a PCB circuit electromagnetic field. The method is characterized in that the method comprises the steps that 1 an electromagnetic field probe is used to test near-field electromagnetic field intensity data; 2 a dipole array is set; 3 a mapping matrix T between a sampling point and the dipole array is calculated; 4 a dipole moment matrix X (alpha) is calculated; 5 the tangential electromagnetic field component of the dipole moment matrix X (alpha) on an observation plane at any height above a PCB circuit is calculated; and 6 the tangential electromagnetic field component acquired in step 5 is substituted into formulas (32) and (33) for calculation to solve a normal electromagnetic field component on the plane in step 5. The method has the advantages that voltage and current distribution of the PCB circuit can be well reflected by the matrix; the electromagnetic field radiation can be accurately calculated; the test cost of electromagnetic field distribution is reduced; a powerful basis is provided for the link of system-level electromagnetic compatibility design index quantification verification; the PCB circuit electromagnetic field inversion is realized; and near-field coupling and far-field radiation characteristics of the PCB circuit are acquired.

The invention discloses a dielectric function gradient insulating dual-mode non-destructive testing method which comprises the steps of performing segmentation according to the density change conditions at different positions in a three-dimensional insulator for obtaining the boundary of different density areas, then using geometric information as input, obtaining a training sample according to measurement of capacitance change on a boundary pole plate, performing training after normalization processing; introducing a boundary capacitance matrix of a functional gradient insulator into a trained model, obtaining the magnitude of a dielectric constant number in a corresponding material subarea in the insulator, and finishing non-destructive testing. According to the method, advantages of high spatial resolution of ICT and direct dielectric inversion of ECT are combined, thereby realizing a requirement for non-destructive testing in dielectric function gradient insulating shape and parameter fixation, improving inversion speed through a machine learning algorithm and settling problems of nonlinear and morbid state in a parameter inversion process.

The invention discloses a water and soil loss quantitative monitoring method based on multi-source data and multi-temporal data, and the method comprises the following implementation steps: 1) obtaining a remote sensing image of an area to be monitored, carrying out atmospheric correction of the original remote sensing image, and obtaining the surface reflectance value of the image according to the theory and method of a COST model; 2) performing qualitative evaluation on the water and soil loss intensity, wherein four factors including vegetation coverage, land utilization type, gully density and optimal terrain factor are included; 3) performing quantitative evaluation on the water and soil loss intensity by utilizing remote sensing and GIS (Geographic Information System) technologies in combination with multi-source data, and calculating and outputting an annual average soil loss amount estimated value A of the to-be-monitored area according to a calculation formula A = R * K * LS * C * P of a USLE model; the invention has the advantages of being accurate in estimation result, good in universality and capable of accurately reflecting the rule that water and soil loss changes along with time and achieving long-term dynamic monitoring of regional water and soil loss.

The invention discloses a magnetotelluric inversion method based on a full convolutional neural network, and the method comprises the steps: constructing a multi-dimensional geoelectric model, carrying out the forward calculation of the apparent resistivity of a corresponding dimension, forming a sample set, and dividing the sample set into a plurality of training sets and test sets; constructing a full convolutional neural network structure model to obtain an initialized full convolutional neural network model parameter; training and testing the model based on the training set and the test set to obtain optimized full convolutional neural network structure model parameters; determining whether the training of the full convolutional neural network structure model is completed or not according to the fitting error change corresponding to the training set and the test set; finally, inputting the actually measured apparent resistivity into the trained model for inversion, and further optimizing the model by analyzing the precision of an inversion result until an inversion fitting error meets a set error requirement. By using the nonlinear features of the full convolutional neural network, the problem of local extremum in conventional linear inversion is solved, the operation memory and time loss are effectively reduced, and the fitting precision is improved.

The invention discloses a marine hyperspectral remote sensing image feature analysis method. The method comprises the steps that S1, marine hyperspectral remote sensing image features are classified,including sea surfaces, wind fields, wave fields, flow fields, tides, frontal surfaces, etc.; and S2, analytic calculation of spatial image dimensional information, spectral dimensional information and feature spatial dimensional information in a hyperspectral remote sensing data waveband is performed on all remote sensing images obtained after classification in the step S1. According to the marine hyperspectral remote sensing image feature analysis method, the uppermost characteristic of hyperspectral data is fusion of the image dimensional information and the spectral dimensional information, and continuous spectral information of each ground object is obtained while surface spatial image information is acquired; and by setting a spectrum matching technology, n(th)-order derivatives of aspectrum essentially represent changes of waveforms absorbed by target objects and are spectral indexes of the abundance and states of the absorbing objects. Therefore, the problem that ground objectrecognition and classification precision is generally low through a hyperspectral remote sensing image feature analysis method in the prior art is effectively solved.

The invention provides a converter transformer fire source intensity inversion assessment and temperature field prediction method and system. The method comprises the following steps: 1) establishinga converter transformer fire simulation forward calculation model; finishing data assimilation state vector initialization; 2) performing forward calculation on converter transformer fire simulation to obtain data such as a fire spreading temperature field and the like, and outputting the data; 3) judging whether thermocouple and heat flow meter monitoring data exist or not, if yes, outputting a result by taking the calculation result in the step 2 as a predicted value through a data assimilation algorithm, and turning to the step 4); if not, directly turning to the step 4; 4) judging whetherto end the simulation process, and if yes, ending the simulation; if not, returning the result obtained in the step 3 to the converter transformer fire simulation forward calculation model again, andexecuting the step 2. According to the method, the inversion assessment of the fire source intensity of the converter transformer fire can be accurately and quickly realized, the temperature distribution in the fire spreading process of the converter transformer can be predicted, and a basis is provided for the emergency response and decision making of the converter transformer fire.

The invention belongs to the technical field of radars, relates to an analysis processing method and system based on all-sky meteor radar signals, and aims to solve the problems that all-sky meteor radar analysis processing in China is not comprehensive, and timeliness, accuracy and resolution need to be improved. According to the invention, starting from original signals detected by the all-sky meteor radar, by taking establishment of a perfect all-sky meteor radar analysis and processing system and acquisition of high-resolution background atmospheric parameters as targets, main processes and key technologies of radar signal analysis and processing are investigated, an analysis and processing algorithm of the all-sky meteor radar is realized, data products detected by the all-sky meteor radar are obtained, and establishment of an autonomous all-sky meteor radar analysis and processing system in China is promoted; and according to the method, a meteor radar signal preprocessing algorithm is established, phase correction of echo signals, judgment and screening of under-dense meteor events, precise positioning of meteor wakes and inversion of observation parameters are achieved, and analysis and processing of an all-sky meteor radar are achieved.

The invention provides a multi-phase variable-frequency power source. The multi-phase variable-frequency power source comprises a self-coupling transformer and multiple power module units for realizing a frequency conversion effect, wherein one primary side of the self-coupling transformer is a three-phase winding connected with a power grid, a secondary side of the self-coupling transformer is provided with two three-phase windings, each power module unit comprises three groups of circuits, each group of circuits comprise two three-phase full-wave rectifier circuits which are in anti-parallel, the same-phase ends of outputs of the three groups of circuits are connected with one another, bridge arms of the three-phase full-wave rectifier circuits are controllable power devices, one primary side of the self-coupling transformer is connected with the first group of circuits of the power module units, and the two three-phase windings of the secondary side of the self-coupling transformer are connected with the second groups of circuits and the third group of circuits of the power module units. The multi-phase variable-frequency power source has the advantages that the frequency conversion and inversion are effectively realized, and the bidirectional flow of energy is realized; the variable-frequency power source with different phase numbers is obtained by increasing and decreasing the number of the power module units; a unidirectional silicon controlled rectifier is adopted, so that the circuit topology structure of a full-controlled device is changed, the manufacturing cost is greatly reduced, and the efficiency is improved; and the losses are reduced during frequency conversion due to the adoption of the silicon controlled rectifier, and the multi-phase variable-frequency power source is concise and reasonable in technological structure, low in cost and high in efficiency.

The invention relates to a large-capacity inversion grid-connected device which is characterized by comprising an isolation transformer and power module units, wherein n three-phase windings or 3n single-phase windings are arranged on the secondary side of the transformer. When the 3n single-phase windings are arranged on the secondary side of the transformer, the number of the power module units is n and the power module units are formed by three single-phase controllable full-wave rectification H bridges, or the number of the power module units is 3n and the power module units are formed by one single-phase controllable full-wave rectification H bridge. When the n three-phase windings are arranged on the secondary side of the transformer, the number of the power module units is n and the power module units are formed by a circuit with three-phase output and formed by three controllable full-wave rectification bridge arms. The large-capacity inversion grid-connected device effectively achieves that large-capacity direct current is inverted and then connected into a power grid, achieves inversion and grid-connection of direct current with different capacities by increasing and decreasing the number of the power module units, has the advantages of being compact and reasonable in process structure, low in cost and high in efficiency, meets market requirements and is convenient to popularize and apply.

The invention discloses a soil moisture content detection method based on hyperspectral data. The method is characterized by comprising the following steps: 1) collecting soil samples with different textures and different physicochemical properties in a target area; 2) constructing a soil moisture content-spectral database, and obtaining spectral data of each soil sample under different water content gradients; 3) constructing a water content-spectral reflectance radiation transmission physical model of each soil sample and predicting an optimal waveband; and 4) judging a model to which the spectrum to be measured belongs according to a spectrum angle matching method, obtaining corresponding model parameters, inputting the corresponding optimal waveband reflectivity, and resolving the soilmoisture content. Compared with the prior art, the method has a solid physical foundation, the stability and precision of the model are greatly improved, the universality is high, and the method is particularly suitable for dynamic monitoring and wide application of soil moisture content of different soil types.

The invention belongs to the technical field of infrared spectrum analysis. An infrared spectrum separation algorithm of high-temperature and high-pressure gas spectrum transmittance distribution difference is adopted to extract radiation energy from turbine blades and radiation energy from high-temperature gas in a measurement spectrum in real time, by adopting a high-pressure and high-temperature correction algorithm of a gas transmittance spectrum, the temperature of the turbine blades and the concentration condition of each component of the high-temperature fuel gas are calculated according to the measured values, and real-time high-precision measurement of the temperature of the turbine blades and the concentration of the high-temperature fuel gas is achieved.

The invention relates to a 3D printer that can be shipped automatically. The housing shell is also provided with a sliding assembly and a grabbing mechanism, and a tray is also provided on the base. The sliding assembly includes a first motor, a first screw rod and a The baffle plate, the grabbing mechanism includes a second motor, a circular gear, a drive frame, a rack, a bracket, a cylinder and a grabbing assembly, and the grabbing assembly includes a third motor, a second screw rod, a limiting unit, a fixed rod and a fixed plate , the 3D printer that can be shipped automatically is ingeniously designed and has a high degree of automation. The sliding component is opened to allow the grabbing component to enter the housing shell, and then the pallet and the workpiece on the pallet are forked through the driving component to take out the workpiece. Placed in the predetermined position, it realizes the automation of taking the workpiece after the 3D printer, reduces labor costs, and ensures that the workpiece is not easily damaged. In the working power circuit, the standby current of the integrated circuit is 8mA, which greatly reduces the power of the working power circuit. Consumption, improve its practical value.

The invention provides an aluminum plate impact load positioning analysis method based on acoustic mode superposition. The aluminum plate impact load positioning analysis method comprises the steps of radiation mode analysis of an aluminum plate, establishment of a radiation sound field of the aluminum plate, measurement of local sound field information and inversion of a load impact signal. The radiation modal analysis of the aluminum plate takes a rectangular thin plate as a research object, and the inherent frequency and modal shape function of the aluminum plate can be calculated according to a free vibration differential equation of the thin plate. And according to an acoustic mode superposition method, an external radiation sound field of the aluminum plate can be obtained, and a corresponding relation between the radiation sound field and a load impact signal is established. The microphone array is reasonably arranged on the aluminum plate, so that certain local sound field information can be measured. The inversion of the load impact signal adopts a near-field acoustic holography theory, the information of the whole sound field is inverted from the local sound field information, the position of the load impact is positioned according to the corresponding relation between the radiation sound field and the load impact signal, and the load impact characteristic is inverted.

The embodiment of the invention relates to a method for monitoring hydraulic fracturing cracks based on pressure fluctuation of a closed wellbore. The method comprises the following steps of monitoring the hydraulic fracturing cracks based on the pressure fluctuation of the closed wellbore according to drilling and completion and logging stratum information, acquiring wellbore parameters, geological parameters and fracturing construction and well completion parameters of a fracturing well and a closed well, and establishing a physical model for crack propagation and closed wellbore pressure monitoring; establishing a 'shaft-plane three-dimensional multi-crack' full-coupling fracturing design calculation model; establishing a calculation model for volume and pressure fluctuation of a closedwellbore in the fracturing process; carrying out smoothing processing according to pressure data calculated in step S30, drawing an evolution diagram of pressure and pressure change rate of the closed wellbore and the injection time of the fracturing well, and establishing a typical plate of the pressure and the pressure change rate of the closed wellbore; and according to the forward models in the step S20 and the step S30, adopting an optimization algorithm to establish an inversion model of closed wellbore pressure monitoring data, and acquiring fitting stratum parameters of actual signals.

The invention discloses a concealed internal side-hung upper hinge. The concealed internal side-hung upper hinge comprises a telescopic rod, a turning hinge body and a connecting plate, wherein the telescopic rod is arranged on the top of a suspended sash window; the turning hinge body is arranged on a top corner of an upper window frame; the connecting plate is arranged between the telescopic rod and the turning hinge body; the telescopic rod comprises a bottom guiding plate and a telescopic base arranged on the guiding plate; the connecting plate comprises a first connecting plate body and a second connecting plate body; the turning hinge body comprises a first turning piece, a second turning piece and a third turning piece; the front end of the second connecting plate body is connected with one end of the telescopic base via a pin; the rear end of the second connecting plate body is fixed on the first connecting plate body; the second connecting plate body can rotate along pins arranged at two ends of the second connecting plate body; the second connecting plate body and the first connecting plate body form an 'L'-shaped structure; a second chute is formed in front of the third turning piece; a projected fixing rod is arranged in the second chute; and the first turning piece and the third turning piece respectively rotate along the second chute reversely. The concealed internal side-hung upper hinge is simple in structure, high in sealing performance and flexible and convenient to stretch; a window can be attractive; and a sash and a window frame can be closely adhered or unfolded.