9results about How to "Avoid dipping" patented technology

This application provides an adaptive control method and system for a lead-acid battery charge-discharge switching circuit, relating to the field of adaptive control technology. The method determines the pre-trigger time for charge-discharge switching by measuring the duration of the mains input voltage exceeding the limit between adjacent power frequency cycles; determines the amount of stored charge in the bus capacitor before switching; and determines the power step that the discharge branch needs to bear at the moment of switching, further determining the conduction sequence of the power switching devices in the discharge branch, and causing the discharge branch to gradually accept load current according to the conduction sequence. The method controls the release of stored charge from the bus capacitor to the bus side and performs damping compensation for the transient voltage drop on the bus generated during the discharge branch's acceptance of load current, obtaining a damped recovery trajectory for the bus voltage. The bus voltage is then restored to the steady-state voltage level through the damped recovery trajectory, entering steady-state discharge control. This application can achieve dynamic and stable bus control during charge-discharge switching, thereby reducing bus voltage fluctuations at the moment of switching.

This invention discloses a multi-layer composite antibacterial, breathable, and hemostatic skin dressing and its preparation method, belonging to the fields of medical dressing technology and knitting technology. The dressing of this invention has a multi-layer composite structure, formed by combining a tucked-loop perforated weft-knitted fabric and a non-woven fabric. The tucked-loop perforated weft-knitted fabric, through a combination of actions such as 1-3 perforation, needle turning, shaking, and staggered needle positions, forms a regularly distributed pore structure, enabling the dressing to have zero Poisson's ratio performance within the allowable strain range. The tucked-loop perforated weft-knitted fabric is modified with carboxymethylation and grafted with copper ions, while the non-woven fabric is made from hydrophilic yarn modified with carboxymethylation and chitosan quaternary ammonium salt. The multi-layer composite structure forms a gradient pore size, utilizing the Laplace pressure difference to achieve unidirectional active drainage of exudate. The dressing of this invention combines zero Poisson's ratio fit, gradient pore size drainage, dual-layer synergistic antibacterial properties, and rapid gel hemostasis, simultaneously meeting multiple needs of wound care and showing good application prospects.

The application provides a lifting mechanism, which comprises a battery, an electric motor, a hydraulic pump, an oil tank, an oil cylinder, a working device and a proportional valve or an on-off valve. In an energy recovery mode, the hydraulic fluid drives the hydraulic pump to work in a hydraulic motor mode, and then drives the electric motor to work in a generator mode and charges the battery. Before the proportional valve or the on-off valve is switched from the one-way flow position to the two-way flow position, the hydraulic pump is operated to increase the pressure in the hydraulic pipeline between the hydraulic pump and the proportional valve or the on-off valve. By increasing the pressure in the hydraulic pipeline, the low-pressure hydraulic fluid in the pipeline can be prevented from increasing the pressure due to the communication with the high-pressure fluid in the oil cylinder and being compressed in volume at the moment when the proportional valve or the on-off valve is switched from the one-way flow position to the two-way flow position, so that the working device can be prevented from suddenly dropping, and the safety performance and the operation feeling of the lifting mechanism are improved.

The utility model discloses a glass fiber continuous wiredrawing cooling device in the field of glass fiber processing equipment, which comprises a bottom plate, a cooling box and a box body, the cooling box is fixedly connected to the right side of the top of the bottom plate, and the box body is fixedly connected to the upper side of the right side wall of the cooling box. A winding device is fixedly connected to the left side of the top of the bottom plate, a guide table is fixedly connected to the left side of the bottom of an inner cavity of the cooling box, a net plate is fixedly connected between the lower sides of the inner side walls of the cooling box, and a first shell is fixedly connected between the upper side of the right side wall of the inner cavity of the cooling box and the right side of the top of the inner cavity. According to the glass fiber continuous wiredrawing cooling device, cooling water can be recycled conveniently, waste of water resources is reduced, the use efficiency of the wiredrawing cooling device is improved, glass fiber filaments can be air-dried and rolled conveniently, and use is convenient.

This invention relates to the field of hydrogen production via water electrolysis, and particularly to a shutdown pressure stabilization control method, apparatus, electronic device, and storage medium. The method includes: upon receiving a shutdown signal, initializing the operating state of the control valve group; during the pressure relief phase, acquiring measured values ​​of the liquid levels on the hydrogen and oxygen sides, as well as the system pressure; based on the difference in liquid levels on both sides, cyclically adjusting the opening and closing states of the pressure-holding valves on both sides to maintain the difference within a preset range; until the system pressure is lower than the target holding pressure, closing the pressure-holding valves on both sides to enter the pressure-holding phase. This application utilizes the regulating valves and pressure-holding valves on both sides of the hydrogen and oxygen sides as actuators, and uses the measured system pressure and liquid level values ​​as control references to achieve pressure and liquid level stability during shutdown pressure holding. This solves the problem in the prior art where relying solely on the regulating valves on both sides of the hydrogen and oxygen sides is insufficient for pressure regulation, making it difficult to achieve pressure balance and stability during shutdown pressure holding.

The utility model provides a kind of anti-pressure sore bedpan device for ICU patient, including support, the accommodating groove recessed in the support, and be equipped in the accommodating groove two-way drive assembly and cushioning component, the cushioning component includes the support platform connected with the two-way drive assembly, the bedpan placement slot recessed in the support platform, and detachably equipped in the bedpan placement slot bedpan, the bedpan includes rigid body part, and be equipped on the rigid body part elastic part, the bionic curved surface for adhering human body hip is formed on the elastic part.The anti-pressure sore bedpan device for ICU patient in the utility model, the pressure of sacrococcygeal part and ischial tuberosity is dispersed by the elastic part on bedpan, and the unilateral pressure concentration of hip when long-term bedridden patient is in toilet is reduced by two-way drive assembly, to avoid pressure sore.

The application provides a FRP reinforcing device and method for inhibiting brittle failure, relates to the field of beam reinforcing and repairing, and aims at the problem that the FRP plate is easy to peel off from the concrete, leading to reinforcing failure. The buckle is used to apply active pressure to the FRP plate to increase the friction between the FRP plate and the concrete, and improve the utilization rate of the FRP. A release mechanism is installed at the end of the FRP plate. The clamp and the elastic piece of the release mechanism are used to elastically constrain the end of the FRP plate, release the displacement of the end of the FRP plate, slow down the brittle peeling failure of the FRP plate, and effectively improve the ductility of the FRP plate and the concrete beam.

The application discloses a coal mill fuel quantity-based state early warning method and device, equipment and medium, relates to the computer technical field, and includes: if the coal mill meets the normal operation scene, the coal mill load air door opening, the coal mill inlet mixed primary air pressure and the coal mill drive end material level are respectively converted, the coal mill primary air quantity is converted into the initial fuel quantity, and the target fuel quantity is determined in combination with the correction coefficient output by the target model; if the shutdown scene is met, the target fuel quantity is determined based on the first initial value of the attenuation coefficient of the shutdown stage and the shutdown cumulative time; if the start-up scene is met, the target fuel quantity is determined based on the second initial value of the rising coefficient of the start-up stage and the start-up cumulative time; the target deviation of the target fuel quantity and the reference fuel quantity is used to diagnose the state of the coal mill, and the state diagnosis result is used for phase early warning operation. The calculation accuracy of the coal mill fuel quantity is improved, and the abnormal state of the coal mill is early warned.

The utility model provides a thermal management system and a vehicle, and relates to the technical field of vehicle thermal management, and the thermal management system comprises a fuel cell cooling liquid circulation loop and a gas storage cylinder internally provided with a heat exchange device, the fuel cell cooling liquid circulation loop comprises a cooling liquid circulation pipeline, the circulating pump, the fuel cell stack and the radiator are connected through a cooling liquid circulating pipeline, the downstream of the radiator is connected with an inlet of the heat exchange device in the flowing direction of cooling liquid in the fuel cell cooling liquid circulating loop, and the upstream of the radiator is connected with an outlet of the heat exchange device. The thermal management system disclosed by the utility model can be used for cooling gas in the gas storage bottle and accurately controlling the temperature of the gas within a safety threshold range, so that sudden pressure increase of compressed gas caused by temperature rise can be avoided, the risks of structural damage, sealing failure and the like of the gas bottle can be effectively reduced, the operation reliability of the system can be improved, and the service life of the system is prolonged. And the safety performance of the vehicle can be ensured.