13results about How to "Fix instability" patented technology

The invention discloses a method for manufacturing a copper-block-embedded double-sided printed circuit board, which comprises the following steps of: slotting a core board, and controlling the slot precision within + / -50 microns; the core plate is placed on a marble platform, the copper blocks are placed in the groove holes, and it is ensured that the flatness of the copper blocks is within + / -12.7 micrometers; plugging the hole with vacuum resin, and pasting a high-temperature adhesive tape to fix the copper block after plugging the hole; the baking plate is vertically placed or fixed by a special jig; a UC type coating drilling tool is used for drilling, a segmented drilling mode is adopted to cope with hardness differences of different materials, and the service life of a drill bit is dynamically set and strictly controlled according to the diameter of the drilling tool, the thickness of a copper block and a laminated plate structure; hole metallization is carried out, full-board electroplating is carried out, and it is ensured that the hole copper thickness is 25-30 [mu] m; manufacturing an outer-layer circuit by adopting a high-precision pattern transfer process; and carrying out surface treatment, molding and electrical testing. According to the manufacturing method of the copper-block-embedded double-sided printed circuit board, the displacement risk of the copper block in a double-sided board structure is reduced by 15% through the measures of marble platform flatness control, vertical board baking and the like, and the problems of copper block fixing, precise drilling and interface reliability are systematically solved.

A shaft power monitoring system based on wireless power supply and micro-strain measurement comprises a rotor, a stator, a wireless power supply system and a display end, the rotor part collects shafting strain signals through a strain gauge, and after signal conditioning and digital processing are completed through a microcontroller, non-contact transmission of data is achieved through a wireless transmitting module; meanwhile, electric energy required by operation is obtained through a wireless power supply receiving end and a rectifying circuit board; the stator part receives and analyzes data transmitted by the rotor through a wireless receiving module, and signal management and state monitoring are carried out by a microcontroller; meanwhile, a rotating speed measuring module arranged in the stator monitors the rotating speed of the shaft system in real time, and continuous and stable energy support is provided for the rotor through a direct-current power supply and a wireless power supply transmitting end. According to the invention, through combination of a high-precision micro-strain measurement technology, wireless power supply and wireless data transmission, technical difficulties of a traditional shaft power measurement system can be effectively solved.

The utility model relates to environmental air particulate matter sampling device technical field discloses a kind of environmental air particulate matter sampling devices, including controller, the controller bottom is fixedly connected with tripod, the controller top is fixedly connected with lower cone, the lower cone inside is provided with filter membrane, the lower cone upper surface is provided with PM2.5 cutter, the PM2.5 cutter upper surface is provided with PM10 cutter, the PM10 cutter upper surface is provided with top cover, the PM10 cutter side wall is provided with dismounting assembly, the tripod side wall is provided with fixed component;The dismounting assembly includes fixed block, and the fixed block is fixedly connected in the PM2.5 cutter, PM10 cutter, top cover side wall respectively.In the utility model, by the sliding cooperation of fixed block and L-shaped sliding slot, and the engagement and separation of spring one driven clamping block, PM2.5 cutter, PM10 cutter and top cover are realized quick dismounting, and the maintenance efficiency of device is improved by the above structure.

The application relates to the technical field of clothes dryer accessories, in particular to a plastic-sealed integrated motor for a heat pump clothes dryer, which comprises a motor main body, a wire binding protection assembly and a stability protection accessory. The stability protection accessory provides convenience for the installation of the plastic-sealed motor and has corresponding stability, and the instability problem caused by the vibration of the motor during the working process is solved, so that the unstable connection between the tail wire of the motor and the equipment is avoided. The wire binding protection assembly is arranged to limit the tail wire, which further improves the connection stability and avoids the winding problem with other cables or components, meets the actual use requirement, and the wire binding protection assembly can select the first wire binding protection assembly or the second wire binding protection assembly according to the actual requirement, and has high working flexibility.

The application relates to an antibacterial and antifouling reverse osmosis membrane and a preparation method thereof, and comprises the following steps: (1) uniformly dissolving a multiacyl chloride group organic compound in an organic solvent, then adding cyclodextrin, and carrying out ultrasonic treatment to obtain a cyclodextrin-organic acyl chloride inclusion compound solution; dispersing antibacterial nanoparticles in water, then adding an amino silane coupling agent, and stirring and dispersing to obtain a functionalized antibacterial nanoparticle suspension with amino groups on the surface; (2) uniformly coating the cyclodextrin-organic acyl chloride inclusion compound solution to one surface of a prefabricated reverse osmosis membrane, removing the excess solution on the surface after standing, and then coating the functionalized antibacterial nanoparticle suspension with amino groups on the surface on the surface with the cyclodextrin-organic acyl chloride inclusion compound, removing the excess solution on the surface after standing, and carrying out thermal drying to obtain the antibacterial and antifouling reverse osmosis membrane. The reverse osmosis membrane has excellent stability, small membrane sheet water flux attenuation, obviously improved antifouling capacity, and excellent antibacterial capacity.

The utility model discloses a magnetic positioning installation debugging device for electrical engineering, which relates to the technical field of magnetic positioning devices and comprises a debugger, a display screen is mounted on one side surface of the debugger, a control key is arranged on one side of the display screen, a jack is arranged on one side of the top end of the debugger, a connecting block is inserted into the jack, and a transmission line is connected to the top end of the connecting block. One end of the transmission line is fixedly connected with a magnetic positioner; according to the utility model, the clamping block is tightly matched with the mounting seat, so that the mounting seat can be stably fixed on the debugger, the mounting stability of the mounting seat is improved, and the function of preventing the mounting seat from loosening and falling off can be realized; a rectangular through opening formed in the mounting seat is matched with a hanging rope, so that the worker can conveniently hang the hanging rope on the body after penetrating through the rectangular through opening; finally, the problems that an existing device is pulled on a hand through a hanging rope and is prone to falling off due to hand sliding, and the device installation base is not stably fixed are solved, and the safety and stability of device use in the electrical engineering installation and debugging process are improved.

This invention relates to the fields of cosmetics and pharmaceutical chemistry, and discloses a glycyrrhizin salicylate ester and its applications. The structural formula of the glycyrrhizin salicylate ester is shown in Formula I. The glycyrrhizin salicylate ester of this application uses glycyrrhizin and salicylic acid as starting materials, and combines the two active molecules into one through dehydration ester condensation, fundamentally solving the problem of easy oxidation and inactivation of glycyrrhizin, and significantly improving chemical stability. At the same time, this structure cleverly masks the strongly acidic carboxyl group of salicylic acid, resulting in a significant reduction in skin irritation of the final product, making it far milder than physical mixtures, with better tolerance and suitability for a wider range of skin types. The glycyrrhizin salicylate ester of this application combines the excellent whitening and antioxidant effects of glycyrrhizin with the excellent keratin-regulating and anti-inflammatory capabilities of salicylic acid, and has broad application prospects in the preparation of topical products for skin whitening, spot fading, anti-inflammation, anti-acne, and anti-photoaging.

The invention relates to the technical field of satellite navigation and positioning, in particular to a GNSS observation station comprehensive evaluation and optimization method fusing subjective and objective weights, which comprises the following steps: acquiring and preprocessing original observation signals and precision products of a GNSS observation station, and resolving by using a multi-frequency non-combined precision single-point positioning model to obtain observation station quality indexes; carrying out space division and clustering on the geographical coordinates of the observation station by utilizing a K-Means + + algorithm; constructing an analytic hierarchy model and an information entropy model based on the observation station quality indexes, respectively calculating subjective weights and objective weights, and carrying out geometric fusion to obtain comprehensive weights; and grouping according to a clustering result, calculating a close degree coefficient of each observation station by using a TOPSIS model in combination with the comprehensive weight, and outputting an optimal observation station set. According to the invention, by fusing multi-frequency UCPPP quality evaluation, spatial clustering and subjective and objective weight decision models, scientization of observation station quality evaluation and equalization of spatial distribution are realized.

The invention provides a reinforcement learning-based large model intention understanding fine tuning method and device, and relates to the technical field of artificial intelligence, and the method comprises the steps: processing a current input based on a large model, and generating a local sample group containing a plurality of candidate responses; determining a reward value of each candidate response based on the intention matching reward value and the slot position matching reward value of each candidate response; based on the difference between the reward value of each candidate response and the reward mean value, determining the relative advantage value of each candidate response; and updating the parameters of the large model based on the relative advantage value of each candidate response. According to the method and the device provided by the invention, strategy gradient updating is carried out by adopting the relative advantage value, so that the variance of the reward estimation value is effectively reduced, and the instability problem possibly caused by independent establishment of a value network is avoided; and in combination with a refined reward function which is specially designed for the intention understanding task and comprises an importance level and a multi-dimensional matching strategy, the accuracy of executing the intention understanding task by the large model is improved.

The utility model relates to leather production technical field discloses an energy -saving hot -press finishing equipment for leather product, including base, the base top middle fixedly connected with the placing plate, the base front and back both sides are provided with the supporting plate, the supporting plate top middle fixedly connected with the hydraulic cylinder, the hydraulic cylinder bottom is provided with the hot -press plate. In the utility model, through fixed plate, motor, screw rod, movable block, displacement sensor, temperature sensor cooperation realizes the position adjustment according to the size and shape of leather product to ensure that hot -pressing process accurate positioning, and through temperature sensor to the real -time detection of hot -pressing temperature, prevent local overheating or temperature deficiency, through placing plate, pressboard, sliding slot, limit hole, bolt, spring, draw plate cooperation realizes the adjustment sliding plate position to adapt to different size leather, improves equipment versatility, and can firmly fix leather on the placing plate, effectively solves the leather unsteady problem of fixing.

This invention discloses an intelligent control system and method for moisture and temperature during the first humidification stage of leaf re-drying. The system includes: a main PLC, a data acquisition PLC, a server and a client (including a data acquisition unit and a database). The main PLC control module reads real-time process parameters of the first humidification stage and controls the moisture and temperature at the outlet of the first humidification stage based at least on the predicted results. The data acquisition PLC communicates with the main PLC. The data acquisition unit reads historical and real-time process parameters and writes the predicted values ​​of outlet moisture and temperature. The database stores historical and real-time process parameters of the first humidification stage and the predicted values ​​of outlet moisture and temperature. The client reads real-time process parameters and predicts outlet moisture and temperature using a machine learning model. The intelligent control system and method for moisture and temperature during the first humidification stage of leaf re-drying provided by this invention predicts the moisture and temperature of the tobacco leaves at the outlet in real time through a machine learning-trained model, enabling proactive intervention in the amount of steam and water applied to the humidification cylinder.

This utility model discloses an automatic sampling device for belt conveyors, including a concrete foundation installed directly in front of a funnel, and a head roller mounted on a head frame. A rotary gearbox is installed on the front wall of the funnel, and a sampler is installed on the rotary gearbox. The rear of the sampler is connected to a hydraulic cylinder. A receiving hopper is located directly below the sampling spoon of the sampler, and a sample bag is provided at the outlet of the receiving hopper. A rotating receiving device is located on one side of the receiving hopper, and the rotating receiving device is driven to rotate by a receiving stepper motor. This utility model also includes a programmable PLC controller, sensors, and an HMI (human-machine interface), which can control and monitor the operating status of the sampling device in real time, including motor operating parameters, sensor working status, and perform fault alarms and recording. This utility model adopts an automated standard timed sampling method, eliminating the safety hazards of manual sampling, improving the authenticity and stability of sampling, and ensuring safe and convenient operation.

The application relates to the technical field of ultrasonic flaw detection, in particular to an ultrasonic flaw detection method and system based on pulse reflection, which has the technical scheme as follows: S1, collecting real-time vibration information and temperature information of a measured body; S2, constructing a propagation disturbance representation model based on the information in S1; S3, generating a compensation excitation pulse; S4, emitting the compensation excitation pulse; S5, collecting echo signals and obtaining residual signals through matched filtering and cross-correlation processing, and updating phase correction amounts and amplitude coefficients based on the signals and reference echoes to realize closed-loop compensation; the application collects vibration, temperature and geometric data through multiple sensors, constructs a propagation disturbance model and dynamically calculates phase correction amounts and amplitude weighting coefficients, compensates for environmental influences, generates a compensation pulse, emits and processes echo signals using an array transducer, realizes high-precision defect detection, adopts a closed-loop control mechanism, automatically adjusts flaw detection parameters based on residual estimation and feedback, and ensures stability.