16results about How to "Avoid complex structures" patented technology

The invention discloses a multifunctional indoor storage rack which comprises a base with universal wheels, a vertically telescopic rod, a storage rack main body arranged above the telescopic rod and a dustproof soft cover arranged above the storage rack main body. And a plurality of hanging rods which can slide left and right and are locked through fasteners are arranged on the storage rack main body, so that the hanging or placing distance can be flexibly adjusted according to the width of articles. One end of the dustproof soft cover is wound on the reel in the left frame rod, and the other end of the dustproof soft cover is provided with a magnetic suction rod, can be pulled out and wound on the supporting framework above, and is finally fixed on the right frame rod in a magnetic suction manner, so that a dustproof structure covering the upper part of the storage area is formed. According to the design, dust mainly from the upper portion settles, effective dust prevention is guaranteed, meanwhile, the structure is simplified, and operation is convenient. The device has the advantages of being convenient to move, adjustable in height and width, efficient in dust prevention and the like, reasonable in structure, high in function integration degree, suitable for various indoor storage scenes and high in practicability.

This invention belongs to the field of multi-beam antenna arrays and discloses a filtered multi-beam array and method based on a four-channel filter jumper. By integrating a microstrip-to-substrate integrated waveguide structure, a filter Butler matrix containing a four-channel filter jumper, and an antenna array on a first metal layer, a filtered multi-beam array based on a multi-layer planar structure is constructed. The four-channel filter jumper utilizes multiple resonant cavities and coupling structures, and by precisely controlling the coupling phase between the resonant cavities, a preset phase shift is directly introduced while achieving the filtering response, thus integrating filtering and phase-shifting functions into a single device. This design avoids the complex structure of filter couplers and the additional losses of filter phase shifters in traditional integrated schemes, significantly simplifying the device architecture, reducing transmission loss, improving system integration and beamforming accuracy, and effectively meeting the urgent needs of 5G and future 6G communication systems for high performance, low loss, and high integration.

The application discloses a fiber type horizontal angle indicating device based on a self-collimation principle and a method thereof, and relates to the technical field of horizontal angle indication.The device comprises a light source, a fiber weight module, a light intensity receiving module and a frame.The light source emits a space light which is coupled into the fiber weight module.The fiber weight module converts the direction of the incident light into a vertical downward direction and emits the light to a measured object.The measured object reversely couples the incident light into the fiber weight module.The fiber weight module emits the incident light to the light intensity receiving module.The light intensity receiving module converts the incident light into an electric signal.The frame is used for suspending the fiber weight module.The application is suitable for the installation and debugging process of high-end manufacturing equipment, measuring instruments and scientific test equipment, and provides high-sensitivity horizontal angle indication for the adjustment requirement of the spatial posture of a sensitive element and the high-precision level of the ground.

The application relates to a sealing beam lifting mechanism which comprises a lower transverse beam located on the inner side of a civil air defense door, a vertical beam fixedly connected above the transverse beam and sleeved with a slidable protective sleeve on the outer side, a driving handle composed of an inner handle, an outer handle and a connecting shaft, a connecting rod mechanism containing a main connecting rod structure and a secondary connecting rod structure, and the like, the driving handle is swung to drive the connecting rod mechanism to drive the protective sleeve and the vertical beam to move relative to each other, the transverse beam is lifted, the vertical beam is provided with two sets of connecting rod mechanisms, one set of connecting rod mechanism is arranged on each end of the vertical beam, the lower part of the transverse beam is provided with double-layer stepped installation grooves and sealing rubber strips, and the bottom of the vertical beam is fixed with the transverse beam through a connecting plate provided with height adjusting shims. The application has the technical effects of sealing the space between the civil air defense door and the ground and facilitating installation and maintenance.

The embodiment of the application provides a battery baking device and a baking method thereof, and relates to the technical field of battery manufacturing. The device is used for the coordinated drying of a battery in multiple physical fields. A generator is connected in parallel to an oven, a vacuum pump is connected in series to the oven, a valve assembly is used for switching the working states of the vacuum pump and the generator, and a heating plate is arranged in the oven and is in contact with the battery for heat conduction. The battery baking device and the baking method thereof can efficiently drive the desorption and migration of strongly adsorbed moisture in the battery, and improve the drying depth and time economy of the baking process.

The utility model provides PVC (polyvinyl chloride) material hot-cutting granulation equipment, which belongs to the technical field of PVC granulators and comprises a processing shell, an extrusion plate is slidably connected in the processing shell, and a plurality of extrusion holes are formed in the lower end of the processing shell; the lower pressing rod is fixedly connected to the upper end of the extrusion plate; the lead screw nut is fixedly connected to one end of the lower pressing rod; the lead screw is in threaded connection with the lead screw nut, and the driving gear is fixedly connected to the lower end of the lead screw; the gear ring is rotationally arranged on the lower side of the machining shell, the gear ring is intermittently meshed with the driving gear, rotation of the lead screw is converted into linear motion through the lead screw nut, the pressing rod is driven to push the extrusion plate to press downwards, and the materials are continuously extruded out of the extrusion hole; when the driving gear at the tail end of the lead screw is meshed with the gear ring, the gear ring drives the cutter to rotate at a high speed, the cutting action is completely matched with the extrusion rate, and it is ensured that materials are cut immediately after being extruded and particles are uniform in size.

The utility model relates to the technical field of tea leaf forming processing discloses a tea ball dragon ball secondary pressure setting mechanism, design includes carousel, pressure setting mechanism and guide strip, the carousel evenly has a plurality of pressure setting mechanisms, a plurality of pressure setting mechanisms along the rotation center of carousel evenly annular arrangement, the pressure setting mechanism includes gyro wheel, push -and -pull integrated pole and first hemisphere mould and second hemisphere mould, the first hemisphere mould with carousel between relative fixed, the second hemisphere mould with push -and -pull integrated pole relative fixed, push -and -pull integrated pole far from the one end of carousel rotatoryly be equipped with gyro wheel, when the pressure setting mechanism rotates to guide strip one side, the gyro wheel with guide strip contact. The hemisphere mould of different ball diameter can realize quick matching and replacement according to the connecting sleeve, and the mould is simple and low in cost, the utility model shortens the die changing debugging time from 5 to 8 hours to 5 minutes, and the efficiency is improved by more than 60 times.

The invention discloses a strain slow-release Ge / Si / SiGe heterostructure. The strain slow-release Ge / Si / SiGe heterostructure sequentially comprises a Ge substrate, a Si buffer layer and a SiGe epitaxial layer from bottom to top, the thickness of the Si buffer layer is 5-12 nm; and the thickness of the SiGe epitaxial layer is 180 to 200 nm. The invention also discloses a growth method of the strain slow-release Ge / Si / SiGe heterostructure. The growth method specifically comprises the following steps: carrying out surface treatment and activation on the Ge substrate; epitaxially growing a Si buffer layer on the Ge substrate by adopting LPCVD (Low Pressure Chemical Vapor Deposition); and growing a SiGe epitaxial layer on the Si buffer layer by adopting an LPCVD (Low Pressure Chemical Vapor Deposition) method, and cooling. By constructing the strain slow-release Ge / Si / SiGe heterostructure, effective regulation and control of a Ge / Si interface mismatch strain release path are realized, dislocation is released in the Si buffer layer in a preposed manner and is terminated at the Si / SiGe interface, and thus the defect density in the SiGe epitaxial layer is remarkably reduced.

This application relates to the field of smart bathroom technology, and provides a water pattern switching device, a spray gun, a smart toilet seat, and a smart toilet. The switching valve has a water passage chamber and a movable component movably disposed within the water passage chamber. The switching valve has a first spray hole and a second spray hole. In a first position, the first spray hole faces upward, aligning with the water outlet and communicating with the water passage chamber, while the second spray hole faces downward. The movable component can move under gravity to the connection point between the second spray hole and the water passage chamber, sealing the second spray hole. In a second position, the second spray hole faces upward, aligning with the water outlet and communicating with the water passage chamber, while the first spray hole faces downward. The movable component can move under gravity to the connection point between the first spray hole and the water passage chamber, sealing the first spray hole. Multiple water patterns can be switched using only one water supply pipe combined with the gravity sealing of the movable component, overcoming the structural complexity of traditional solutions that require multiple independent water supply channels corresponding to different spray holes, effectively reducing the structural complexity of the device and the number of accessories.

The invention relates to an optical parameter detection device and method, in particular to an optical system wavefront detection device and method based on phase modulation. In order to solve the problems in the prior art that a multi-frame acquisition strategy adopted by a phase recovery method based on a point spread function is difficult to adapt to a dynamic test scene, a single-frame acquisition strategy is difficult to stably invert wavefront with conjugate symmetry, and iterative inversion operation time is relatively long and may fall into a local optimal solution, the invention provides a phase recovery method based on a point spread function. The invention discloses an optical system wavefront detection device based on phase modulation. The optical system wavefront detection device comprises a module, a first imaging lens, a first plane mirror, a beam splitter, a microscope objective, a second plane mirror, a partition phase plate, a second imaging lens and a photoelectric detector, and asymmetric phase coding is achieved through the partition phase plate. Based on the device, according to the method, the unsupervised deep neural network is combined with the physical driving layer, so that accurate inversion of different optical systems to be detected is realized.

This invention belongs to the field of power electronic converter technology, specifically disclosing a direct optimization model predictive control method and system for an MMC-STATCOM system. The method includes: calculating the differential-mode voltage and common-mode voltage between the upper and lower arms of each phase; injecting third harmonic voltage into the upper and lower arms of each phase to obtain the upper and lower arm voltages of the newly added third voltage component for each phase; based on the obtained upper and lower arm voltages of the newly added third voltage component, determining the number of sub-modules to be engaged in each phase's upper and lower arms using a nearest-level approximation modulation strategy; sorting the sub-modules according to the capacitor voltage of each sub-module in the arm; and determining the engaged sub-modules for each arm according to the current direction. This invention, while maintaining the discrete control structure, achieves direct injection of third harmonic voltage under the MPC framework, exhibiting higher real-time performance and scalability.

A vehicle seat includes a seat cushion including a seat cushion frame as an internal skeleton of the seat cushion, a footrest rotatably provided at a front portion of the seat cushion frame, a lift driving mechanism configured to raise and lower the front portion, and a footrest tilting mechanism configured to rotate the footrest in conjunction with an operation of the lift driving mechanism.

This invention discloses a predictive control method for back-to-back multiport converters based on vector decomposition. First, it obtains the stator current reference on the machine side, the capacitor voltage reference on the grid side, and the battery port power references on both the machine side and the grid side. Then, it equates the back-to-back multiport converter to a back-to-back two-level converter, obtaining simplified basic voltage vectors for machine-side and grid-side control. Next, it establishes predictive models for the machine-side stator current and the grid-side inductor current, and further establishes loss functions for machine-side and grid-side control. By optimizing the loss functions, it obtains the optimal basic voltage vectors and their durations on the machine side and grid side, respectively, and then synthesizes the desired voltage vectors on the machine side and grid side. Finally, it equates the back-to-back multiport converter to four virtual two-level converters associated with the DC port, and decomposes the output voltage vectors of the four virtual two-level converters according to the calculated scaling factor, thus obtaining the switching sequence of the back-to-back multiport converter.

This invention discloses a force adjustment feedback mechanism, a lifting control system, and a control method for a tractor. The force adjustment feedback mechanism includes a bent rod, a return spring, a force adjustment feedback flexible shaft, a bent rod housing, a positioning bolt pin, and a sensor control rod. The bent rod housing is mounted on the rear transmission housing of the tractor, and the bent rod is mounted on the bent rod housing. The sensor control rod is mounted on the bent rod housing via the positioning bolt pin and can rotate around the positioning bolt pin. One end of the sensor control rod is in line contact with the bent rod, and the other end is connected to the force adjustment feedback flexible shaft. In the initial state, the contact foot of the sensor control rod is just in contact with the bent rod. The two ends of the return spring are inserted into the positioning holes of the bent rod housing and the sensor control rod, respectively. This invention replaces the original mechanical linkage of force feedback with a flexible shaft. The deformation of the bent rod caused by the traction force is fed back to the main control valve core of the lifting control valve through the flexible shaft, realizing force adjustment control. The force adjustment feedback mechanism has a simple structure.

The embodiment of the invention provides a switching system and method for multiband OTDR optical path multiplexing, and belongs to the technical field of optical fiber testing and optical communication detection. The system comprises a multi-band transmitting unit which is used for switching among a plurality of working bands and outputting OTDR test pulses of corresponding bands; the optical path multiplexing unit is used for respectively introducing the test pulses of the plurality of working wavebands into a measurement optical path and a reference optical path through a unified optical path; the internal reference optical fiber is used for providing reference echo signals for calibration under a plurality of working wavebands; the multi-band echo receiving unit is used for performing band separation on the echo light from the measuring light path and the reference light path and outputting echo signals of corresponding bands; and the control and calibration unit is used for performing normalization processing on the echo signal of each working wave band based on the calibration result. According to the scheme, the test pulse output consistency and the echo data comparability are kept under the multi-band condition, so that a cross-band unified measurement result capable of being used for conjoint analysis is obtained.

This invention relates to a turbine direct-drive seal test device and method for liquid rocket engines. The turbine direct-drive seal test device for liquid rocket engines includes a housing, a connecting shaft, a radial turbine, an auxiliary impeller, and a test seal. The connecting shaft is coaxially mounted inside the housing, and a sealing ring cover is fixed inside the housing. The sealing ring cover is sleeved on the connecting shaft and rotates and seals with the connecting shaft through the seal. The auxiliary impeller is coaxially fixed on the connecting shaft and arranged adjacent to the sealing ring cover, with a flow clearance reserved between the auxiliary impeller and the sealing ring cover. The stationary ring of the test seal is fixed on the inner wall of the housing, and the dynamic ring of the test seal is fixed on the connecting shaft. The connecting shaft is rotatably connected to the inner wall of the housing through a bearing. Both the bearing and the auxiliary impeller are located in the medium cavity. The housing has a working medium inlet and a working medium outlet. The housing also has a driving medium inlet and a driving medium outlet. One end of the connecting shaft extends into the driving cavity and is coaxially connected to the radial turbine.