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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Форма поиска

Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 33. Отображено 33.
23-06-2023 дата публикации

Method for calculating influence of large phase modifier on DC commutation failure critical voltage

Номер: CN116316579A
Принадлежит:

The invention provides a method for calculating the influence of a large phase modifier on a DC commutation failure critical voltage, and the method comprises the steps: building a DC inverter side commutation voltage calculation model, and obtaining a commutation voltage change rule; establishing the relationship between the commutation current and the commutation voltage, the commutation reactance and the commutation angle; obtaining a relation between a direct current inversion side commutation angle and commutation voltage and commutation current; establishing a calculation model between the alternating current system voltage and the high-voltage direct current transmission commutation angle, and calculating to obtain an alternating current system critical voltage corresponding to the commutation failure of the high-voltage direct current transmission inverter side; and constructing a simulation calculation platform containing the large phase modifier and a detailed direct current model ...

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18-04-2019 дата публикации

SYSTEM AND METHOD FOR FAULT-TOLERANT CONTROL UNDER FIVE-PHASE PERMANENT MAGNET SYNCHRONOUS MOTOR OPEN-CIRCUIT FAULTS

Номер: WO2019071955A1
Принадлежит:

Disclosed in the present invention discloses a system and method for fault-tolerant control under five-phase permanent magnet synchronous motor open-circuit faults. The method comprises: employing a rotation speed controller to obtain a fundamental wave space quadrature-axis current reference value; on the basis of a magneto-motive force invariant principle, performing reconfiguration of phase current after generation of faults, and obtaining a fundamental wave space two-phase static current reference value through the developed Clark conversion; employing the collected phase current and a rotor position angle to calculate a no-voltage voltage vector effect time; employing the two-phase static current reference value and a preset value to establish a value function; and finally, obtaining an optimal voltage vector and an effect time thereof through optimization of the value function, employing duty ratio control to design a duty ratio and convey to duty ratio to an inverter, and outputting ...

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27-06-2023 дата публикации

Grounding protection device, electrical equipment and method for grounding electrical equipment

Номер: CN116345195A
Принадлежит:

The invention discloses a grounding protection device capable of detecting grounding resistance. The grounding protection device comprises a detection device used for monitoring the grounding resistance on line; the protection main grounding body is connected with the detection equipment; and the auxiliary grounding body is electrically connected with the detection equipment. The grounding protection device can be used as a grounding electrode of electrical equipment, can solve the problem of on-line monitoring of temporary grounding resistance of ground engineering electric equipment, and is beneficial to preventing accidents of personal electric shock injuries. The invention further discloses electrical equipment using the grounding protection device as a grounding electrode and a method for grounding the electrical equipment by using the grounding protection device.

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14-07-2023 дата публикации

Reconstituted tobacco wastewater treatment device

Номер: CN116425283A
Принадлежит:

The invention provides a reconstituted tobacco wastewater treatment device which comprises a mixing device which is provided with a water inlet for introducing wastewater to be treated and a water outlet for discharging wastewater treated by a wastewater treatment agent, and the mixing device comprises a first mixing chamber, a first dosing channel, a second mixing chamber and a second dosing channel, the first dosing channel is configured to add a first medicament to the first mixing chamber, and the second dosing channel is configured to add a second medicament to the second mixing chamber; the stirring device comprises a first stirring part arranged in the first mixing chamber and a second stirring part arranged in the second mixing chamber, and the first stirring part is configured to stir fluid in the first mixing chamber at a first stirring speed according to components of the first medicament; the second stirring part is configured to stir the fluid in the second mixing chamber at ...

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11-08-2023 дата публикации

Position sensorless control method of permanent magnet synchronous motor

Номер: CN116582048A
Принадлежит:

The invention discloses a sensorless control method for a permanent magnet synchronous motor, and relates to the field of permanent magnet synchronous motors, the method adopts an I/F curve generator to realize rotating speed open-loop starting control in a low rotating speed scene at the initial starting stage, and can overcome the influence caused by a certain angle error by depending on the power angle self-balancing characteristic; after the rotating speed is gradually increased, smooth transition of values of the q-axis reference current and the reference rotor angle is realized through a variable-weight weighting method, and finally, closed-loop control of the rotating speed is realized by using a sliding mode controller depending on relatively accurate back electromotive force information under the condition of high rotating speed in the later stage of starting. The sliding-mode observer control algorithm can quickly and stably work in a high-speed domain stage; according to the ...

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28-04-2022 дата публикации

MICRO-ROBOT MAGNETIC DRIVE DEVICE BASED ON DUAL CLOSED-LOOP THREE-DIMENSIONAL PATH TRACKING, AND CONTROL METHOD

Номер: WO2022083173A1
Принадлежит:

A micro-robot magnetic drive device based on dual closed-loop three-dimensional path tracking, and a control method. The method comprises: inputting a desired tracking path, and obtaining current pose information of a magnetic micro-robot by means of a camera to calculate a centroid position, an actual axial direction (XB), coordinates of a desired position point (s), on the desired tracking path, closest to the centroid, and a tangential direction (XF) of the point (s); according to the actual axial direction (XB), the tangential direction (XF), and disturbance compensation, calculating a horizontal distance (dz), a vertical distance (dy), a direction angle error (θde), and a pitch angle error (θie) between the two points; and calculating a required rotating magnetic field according to a designed position closed-loop controller, and a current closed-loop magnetic field controller performing, according to the rotating magnetic field and a fed-back coil output current, closed-loop control ...

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14-07-2023 дата публикации

Skin repairing cream for mask face and preparation method thereof

Номер: CN116421497A
Автор: HUANG WENTAO, YANG LU
Принадлежит:

The invention provides a skin repairing cream for mask face and a preparation method thereof. The skin repair cream is prepared from the following raw materials: macromolecular sodium hyaluronate, micromolecular sodium hyaluronate, enzyme-digested oligomeric sodium hyaluronate, a stabilizer, a defoaming agent, an emulsifying agent, a thickening agent and a preservative, the mass ratio of the macromolecular sodium hyaluronate to the micromolecular sodium hyaluronate to the enzyme-digested oligomeric sodium hyaluronate is (7-9): (0.5-1.5): (0.5-1.5). The physicochemical indexes of the prepared skin repairing cream meet the requirements, and the skin repairing cream is non-toxic to cells, free of skin sensitization and stimulation, high in biological safety, capable of well repairing the'mask face 'and high in repairing success rate.

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09-06-2023 дата публикации

Freight unmanned aerial vehicle system capable of automatically loading and unloading

Номер: CN116238698A
Автор: GU CHAO, HUANG WENTAO, ZHAO YI
Принадлежит:

The invention discloses a freight unmanned aerial vehicle system capable of automatically loading and unloading, and relates to the technical field of freight unmanned aerial vehicle systems. Comprising an unmanned aerial vehicle and a lifting platform used in cooperation with the unmanned aerial vehicle, the lifting platform comprises a freight platform body, and lifting bearing mechanisms are installed on the two sides of the freight platform body; the lifting bearing mechanism comprises a lifting guide cylinder, and the lifting guide cylinder is fixed to the side wall of the freight platform body. By arranging the lifting bearing mechanism, when the unmanned aerial vehicle lands, a bucket-shaped guide piece is used for guiding a positioning rod, so that the positioning rod is accurately inserted into a lifting guide cylinder, the unmanned aerial vehicle body stops flying, the positioning rod slides downwards along the lifting guide cylinder based on gravity to be connected with a lifting ...

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07-07-2023 дата публикации

Multi-task scheduling method and system based on genetic algorithm

Номер: CN116401037A
Принадлежит:

The invention discloses a multi-task scheduling method and system based on a genetic algorithm, and belongs to the technical field of electric digital data processing, and the method comprises the steps: obtaining an evaluation function based on task execution time, priority and resource use coherence; obtaining a priority sequence set of multi-task scheduling based on the preposed task constraint and the resource constraint; according to the evaluation function, performing simulation and evaluation on the priority sequence set to obtain fitness; screening the priority sequence set according to the fitness to obtain a parent sequence set; searching the parent sequence set based on a genetic algorithm to obtain a second task sequence set; selecting a second task sequence by maximizing the fitness; and performing task scheduling according to the second task sequence. A plurality of problems such as task execution time, priority and resource use coherence are converted into an evaluation function ...

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12-07-2018 дата публикации

CHARGING AND MUTUAL CHARGING APPARATUS FOR COMBINED INTELLIGENT DEVICES, AND CHARGING METHOD

Номер: WO2018127105A1
Принадлежит:

A charging and mutual charging apparatus for combined intelligent devices, and a charging method, relating to the field of charging of intelligent devices. The charging and mutual charging apparatus for combined intelligent devices comprises a main device and an accessory. The main device comprises a main input circuit, and the main input circuit comprises a first control module (CPU1), a first battery (1), a first battery management module (IC1), a first switch (Q1) and a first charging port (V1). A secondary input circuit comprises a second control module (CPU2), a second battery (2), a second battery management module (IC2), a second switch (Q2) and a second charging port (V2). The first charging port (V1) and the second charging port (V2) both can control the first switch (Q1) and the second switch (Q2) by means of a pin. The first control module (CPU1) is electrically connected to the second control module (CPU2) by means of a control protocol. Mutual charging can be carried out between ...

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28-06-2018 дата публикации

CHARGING CONTROL SYSTEM

Номер: WO2018113531A1
Принадлежит:

A charging control system (30, 31, 32). The charging control system (30, 31, 32) comprises: a master device (10), comprising a first USB interface (100) and a first charging management circuit (102); at least one slave device (20), comprising a second USB interface (200) and a second charging management circuit (201); and a gating control circuit (101), the gating control circuit (101) being provided in the master device (10) or the slave device (20), an input end of the gating control circuit (101) being coupled to the first USB interface (100) and the second USB interface (200), and an output end of the gating control circuit (101) being coupled to the first charging management circuit (102) and the second charging management circuit (201), so as to selectively control USB charging interfaces of each of the first charging management circuit (102) and the second charging management circuit (201). By means of the method, a plurality of charging modes of the master device (10) and the slave ...

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07-04-2023 дата публикации

Recommendation reservation method and device based on artificial intelligence, equipment and storage medium

Номер: CN115936154A
Принадлежит:

The invention belongs to the field of recommendation reservation, and relates to a recommendation reservation method and device based on artificial intelligence, computer equipment and a storage medium, and the method comprises the steps that an APP client obtains ticket buying information of a user; the APP client obtains timely project queuing time and project position information; acquiring the real-time position of the user, calling out the route of the user to the position of the in-line item, and calculating the time of going to the position of the in-line item and the predicted queuing time of the corresponding playing item; according to the route time and the predicted queuing time, judging whether the travel item at the current time point is optimal or not, if the predicted queuing time does not exceed the optimal route time threshold, recommending the user to go for, otherwise, executing the next step; and according to the real-time position of the user, acquiring nearby playing ...

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11-04-2023 дата публикации

Data transmission method and device based on data cache and storage medium

Номер: CN115952105A
Принадлежит:

The invention relates to a data transmission method and device and a storage medium. Wherein the data caching device receives control data sent by the instruction sending end through the first data transmission port, and reads feedback data of the instruction execution end from the second data storage address through the first data transmission port, so that the instruction sending end generates instruction modification data based on the feedback data. Reading the control data from the first data storage address through a second data transmission port, and sending the control data to an instruction execution end, so that the instruction execution end performs instruction execution based on the control data; and feedback data returned by the instruction execution end is received through the second data transmission port. According to the application, the data caching device performs data interaction with the instruction sending end and the instruction execution end through the first data ...

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21-07-2023 дата публикации

Broadband high-linearity driving amplifier with adjustable quiescent current

Номер: CN116470862A
Автор: CHENG ZHIQUN, HUANG WENTAO
Принадлежит:

The invention discloses a quiescent current adjustable broadband high-linearity driving amplifier, which adopts a three-stage cascade amplification structure and is mainly composed of a first-stage amplification circuit, a first inter-stage matching circuit, a second-stage amplification circuit, a second inter-stage matching circuit and a third-stage amplification circuit. According to the self-adaptive bias circuit with the adjustable current, three-stage total quiescent current accurate control of the driving amplifier is realized; secondly, an output matching network of the driving amplifier adopts an equal-Q-value double-LC network to complete broadband impedance matching, and an input matching network adopts a single-LC network to be combined with an RC series feedback circuit to achieve the purpose of broadband input impedance matching.

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27-06-2023 дата публикации

Unmanned aerial vehicle suspension type high branch pruning and collecting device

Номер: CN116326364A
Принадлежит:

An unmanned aerial vehicle suspension type high branch pruning and collecting device comprises a support of a rectangular frame structure, an inhaul cable lifting component used for suspending the support, a supporting plate used for collecting treetops and a gathering component used for gathering and cutting the treetops. The four corners of the support are suspended to the unmanned aerial vehicle base through four strands of retractable ropes by the inhaul cable lifting component, so that the lifting height of the support is adjusted by the inhaul cable lifting component; the gathering component comprises a saw blade, an auxiliary gathering disc and a cutting gathering disc, wherein the auxiliary gathering disc and the cutting gathering disc can be close to or away from each other and are in sliding connection with the support. The saw blade is arranged on the cutting gathering disc and gets close to the auxiliary gathering disc along with the cutting gathering disc to complete cutting ...

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23-06-2023 дата публикации

Power module integrated assembly mechanism and method

Номер: CN116276773A
Принадлежит:

The invention discloses a power module integrated assembly mechanism and method, relates to the field of power module assembly, and solves the problems that in the prior art, when an IPM power module and a radiator are assembled, the process is complex, the efficiency is low, potential quality hazards of products are likely to occur, and the human efficiency is low. The mechanism comprises a base assembly, a printing assembly and an assembly line support, the base assembly is used for installing a radiator to be assembled and a power module to be assembled, the base assembly is slidably installed on the assembly line support, the printing assembly is used for coating the radiator to be assembled with thermal grease, and the printing assembly is rotatably installed on the assembly line support. When the power module integrated assembling mechanism is used for assembling the radiator and the power module, only the printing assembly needs to be turned over, one-time forming of coating of the ...

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18-07-2023 дата публикации

Wedge block automatic pop-up device and hemming device thereof

Номер: CN116441443A
Принадлежит:

The invention discloses a wedge block automatic pop-up device and a hemming device thereof, and belongs to the technical field of automobile manufacturing, the wedge block automatic pop-up device comprises a barrier strip, a wedge block located below the barrier strip and a spring connecting the barrier strip and the wedge block, the large end of the wedge block is connected with an abutting part higher than the wedge-shaped top face of the wedge block, and the small end of the wedge block is located below the barrier strip; one end of the spring abuts against the barrier strip, and the other end of the spring abuts against the abutting part; a pushing structure is arranged on the side, away from the barrier strip, of the abutting part, when the pushing structure pushes the wedge block to go deep into the position below the barrier strip, the barrier strip ascends, and when the pushing structure resets, the wedge block moves away from the barrier strip under the action of the spring, and ...

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11-07-2023 дата публикации

Dynamic reactive power support method for large-capacity direct-current receiving end power grid after flexibility transformation of analysis unit

Номер: CN116418007A
Принадлежит:

The invention provides a dynamic reactive power support method for a high-capacity direct-current receiving-end power grid after analysis of unit flexibility transformation. The method comprises the following steps: establishing a unit mathematical model after unit flexibility transformation; obtaining a unit transient reactive power output expression by using the established unit mathematical model after the unit is flexibly transformed; according to the high-voltage direct-current transmission project, establishing a direct-current commutation failure mathematical relationship; obtaining an alternating current system critical voltage corresponding to the direct current commutation failure by using the established direct current commutation failure mathematical relationship; constructing a dynamic simulation test platform containing unit flexible transformation, and determining the influence of the flexible transformation unit on the high-capacity DC commutation failure by using the obtained ...

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02-06-2023 дата публикации

Intelligent continuous detection system for food packaging

Номер: CN116198812A
Принадлежит:

The invention provides a food packaging intelligent continuous detection system which comprises a rack, a grain guide cross arm is installed on the upper portion of one end of the rack, a temporary storage box is installed on the grain guide cross arm, a food inlet is formed in the upper portion of one end of the temporary storage box, a food guide cylinder is arranged on the lower portion of the other end of the temporary storage box, and a skin separation unit is arranged in the temporary storage box. A baffle unit is mounted at an outlet of the food guide cylinder; a bag supporting plate is installed on the upper portion of the other end of the rack, a bag conveying rail is installed on the rack between the bag supporting plate and the temporary storage box, a bag conveying unit is movably installed on the bag conveying rail, a spacing conveying unit is arranged on the ground below the baffle unit, a detection supporting rod is vertically installed at the bottom of the bag supporting ...

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04-07-2023 дата публикации

Small drill carriage for coal mine

Номер: CN116378566A
Принадлежит:

The small drill carriage for the coal mine comprises a main machine body, a working mechanism, a rotary speed reducing mechanism and a rotary supporting mechanism, and crawler walking devices are fixed to the two sides of the main machine body; a working mechanism is arranged above the main machine body, the main machine body comprises a main machine frame, a rotary speed reducing mechanism is arranged on the main machine frame, the main machine frame is connected with the working mechanism through the rotary speed reducing mechanism, and the two sides of the working mechanism are each provided with a set of rotary supporting mechanism. The working mechanism comprises a sliding frame assembly, a power head, a clamping device, synchronous lifting mechanisms and working mechanism supporting columns, the rear end of the sliding frame assembly is connected with the left synchronous lifting mechanism and the right synchronous lifting mechanism, the two sides of the sliding frame assembly are ...

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08-08-2023 дата публикации

Unmanned aerial vehicle for cable carrying

Номер: CN116552839A
Принадлежит:

The invention discloses an unmanned aerial vehicle for cable carrying, and relates to the technical field of unmanned aerial vehicles. The cable carrying efficiency is improved. Comprising an unmanned aerial vehicle body, a winding part and a cutting part, the cutting part comprises a first vertical plate fixed to the outer wall of the bottom of the unmanned aerial vehicle body, and an adjusting motor is fixed to the outer wall of one side of the first vertical plate; and the shifting plate is fixed at the output end of the adjusting motor through a pin. The two kidney-shaped holes are formed in the shifting plate, so that when the shifting plate rotates, the cutting assembly can move upwards in the vertical direction, the clamping block can drive the cable to rotate from the vertical state to the horizontal state, and therefore after the cutting saw blade stretches into a groove in the clamping block, the cutting saw blade can move upwards in the vertical direction. And a chock plug and ...

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11-07-2023 дата публикации

Flange welding positioning system and method

Номер: CN116408598A
Принадлежит:

The invention discloses a flange welding positioning system and method, the system comprises a beveling machine, the beveling machine comprises a blade mounting seat and a supporting rod, the distance between the blade mounting seat and the supporting rod is adjustable, the blade mounting seat is rotatable, and an internal expansion structure is fixed at the end part of the supporting rod and is used for fixing a pipe; the device further comprises a control module, a magnetic attraction positioning mechanism fixed to the blade mounting base, a flange plate magnetically attracted to the magnetic attraction positioning mechanism and a double-hole positive positioning instrument detachably connected to the flange plate. The double-hole positive positioning instrument comprises a horizontal plate fixed at the top of the flange plate and a tilt angle sensor arranged on the horizontal plate, and the tilt angle sensor is used for measuring the tilt angle of the horizontal plate; the control module ...

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16-05-2023 дата публикации

Efficient data transmission method and system and storage medium

Номер: CN116126768A
Принадлежит:

The invention relates to an efficient data transmission method and system and a storage medium. The method comprises the following steps: receiving data including a clock signal, a chip selection signal and a data sending signal sent by a data sending end through a data receiving end; when the state of the chip selection signal is a data transmission state and the clock signal is a rising edge, receiving data on a data bit in the data sending signal; wherein the received data is the data of the data bits written into the data sending signal by the data sending end when the clock signal is the falling edge. According to the method, the data transmitting end and the data receiving end perform data transmission in a source synchronization mode, so that the stability of data transmission is enhanced, and the efficiency of data transmission is improved.

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13-04-2021 дата публикации

Building steel storage rack

Номер: CN212947760U

The utility model discloses a building steel storage rack which comprises stand columns, transverse rods and longitudinal rods, the stand columns are connected through the longitudinal rods in the horizontal direction, the ends of the longitudinal rods penetrate through the stand columns, locking bolts are arranged on the side faces of the ends of the longitudinal rods, the locking bolts are in threaded connection with the stand columns, and fixing parts are arranged at the positions, close to the two ends, of the transverse rods. Stop dogs are arranged at the positions, located at the two ends of the fixing part, of the transverse rod, fixing grooves are formed in the positions, close to the two ends of the longitudinal rod, of the longitudinal rod, the fixing grooves are matched with the fixing part in shape and size, elastic locks are installed at the two ends, in the direction of the longitudinal rod, of the fixing grooves, and a plurality of containing grooves are evenly distributed ...

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02-06-2023 дата публикации

Security electric box capable of being quickly connected to emergency power supply

Номер: CN116207643A
Принадлежит:

The invention belongs to the technical field of distribution boxes, and particularly relates to a security electric box capable of being quickly connected to an emergency power supply. The top of the bottom stand column is connected with a supporting bottom plate, the top of the electric box body is provided with an air blowing device and a top cover, the interior of the electric box body is divided into a wire inlet chamber, an equipment chamber and a wire outlet chamber by a left partition plate and a right partition plate from left to back, and the side faces, located in the equipment chamber, of the left partition plate and the right partition plate are each provided with a longitudinally-arranged limiting guide plate and a transversely-arranged mounting frame plate. A driving device is arranged on the supporting bottom plate, the driving device is connected with the bottom stand columns, the driving device is used for driving the bottom stand columns to ascend and descend, and a heating ...

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29-08-2023 дата публикации

Facial mask for skin repair after medical art and preparation method of facial mask

Номер: CN116650357A
Автор: YANG LU, HUANG WENTAO
Принадлежит:

The invention provides a skin repair mask used after medical art and a preparation method thereof, the mask comprises essence and mask base cloth, the essence comprises the following components by mass: 40-50 parts of sodium hyaluronate, 30-40 parts of aloe vera gel, 20-30 parts of cholesterol, 20-25 parts of ceramide, 20-25 parts of lecithin, 18-25 parts of betaine, 16-18 parts of oat alkaloid, 10-14 parts of glycerin, 8-12 parts of a mint extract, and 120-160 parts of distilled water; the sodium hyaluronate is prepared from large-molecular-weight sodium hyaluronate, small-molecular-weight sodium hyaluronate and oligomeric sodium hyaluronate. Starting from the composition of skin, various effective components are scientifically and reasonably compounded, so that the composition has excellent biocompatibility, gives full play to the synergistic effect of the effective components, and can resist the damage of external adverse environment, bacteria and sensitization sources, reduce inflammatory ...

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04-04-2023 дата публикации

Automatic coal mine drill carriage capable of efficiently entering and exiting drill rod

Номер: CN115898268A
Принадлежит:

The invention relates to an automatic coal mine drill carriage capable of efficiently entering and exiting drill rods, which comprises a main machine body, a working mechanism, a mechanical arm, a drill rod frame assembly for storing the drill rods, a lower frame assembly, a drill rod push-out mechanism and crawler walking devices, and the crawler walking devices are fixed on two sides of the main machine body, are in contact with the ground and are used for moving the main machine body; the main machine body comprises a mounting plate, a drill rod frame assembly is arranged on the mounting plate, a drill rod push-out mechanism, a rotary supporting assembly and a working mechanism are sequentially arranged on one side of the drill rod frame assembly, the working mechanism is connected with the rotary supporting assembly, and the rotary supporting assembly is connected with a mechanical arm; the drill rod push-out mechanism is connected with the lifting mechanism through a connecting piece ...

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23-06-2023 дата публикации

Oil dam for large-scale oil leakage of airport apron

Номер: CN116289826A
Принадлежит:

The oil blocking dam comprises first oil-proof cloth and a folding supporting frame connected to the inner side of the first oil-proof cloth, and the head end and the tail end of the first oil-proof cloth can be detachably connected through first connecting pieces so that the first oil-proof cloth can form a closed loop; a loose oil absorption cotton layer and an oil absorption sponge layer are sequentially arranged on the inner side of the first oil-proof cloth from bottom to top, a plurality of cotton swabs are embedded in the oil absorption sponge layer, the bottom ends of the cotton swabs are inserted into the loose oil absorption cotton layer, the folding supporting frame comprises a plurality of folding units which are sequentially connected, and each folding unit comprises a first frame body and a second frame body of which the tops are hinged; in every two adjacent folding units, the bottom of the second frame body of one folding unit is hinged to the bottom of the first frame body ...

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21-07-2023 дата публикации

Ripening and packaging integrated device and ripening and packaging method

Номер: CN116461762A
Принадлежит:

The invention provides a ripening acceleration and packaging integrated device and a ripening acceleration and packaging method based on the device, and relates to the field of food preparation equipment, the device comprises a first ripening acceleration device, a first conveying device, a cover buckling device and a second conveying device, the first ripening acceleration device is arranged above the first conveying device, and the second conveying device is arranged above the second conveying device; the cover buckling device is arranged above the second conveying device, the first conveying device is used for driving fruits to move in the first conveying direction, and the second conveying device is used for driving packaging box bodies to move in the second conveying direction. The height of the second conveying device is lower than that of the first conveying device, fruits can fall into a packaging box body of the second conveying device from the first conveying device, the first ...

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23-05-2023 дата публикации

Low-frequency mechanical magnetoelectric antenna based on cantilever beam structure

Номер: CN116154466A
Автор: BAI FEIMING, HUANG WENTAO
Принадлежит:

The invention belongs to the technical field of low-frequency small antennas, and particularly relates to a low-frequency mechanical magnetoelectric antenna based on a cantilever beam structure. According to the invention, the neutral surface of the magnetoelectric cantilever beam is set to be just the interface of the piezoelectric material layer and the magnetostrictive material layer; therefore, the problem that when the layered magnetoelectric composite material is subjected to thickness bending vibration, due to the fact that the position of the neutral surface is improper, the piezoelectric layer is polarized or the polarities are counteracted when the magnetostriction layer is magnetized is effectively solved, unnecessary material expenditure cost is saved, and the inverse magnetoelectric coupling coefficient of the magnetoelectric composite material is further improved. Meanwhile, the working frequency, impedance and quality factor are considered. The device can work at dozens of ...

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08-08-2023 дата публикации

Composite curve grinding device and method for roll grinder

Номер: CN116551482A
Принадлежит:

The invention relates to the technical field of roll grinder grinding, in particular to a roll grinder composite curve grinding device and method.The roll grinder composite curve grinding device comprises a main frame, a roll body is arranged in the main frame, a side frame is arranged at the end, away from the main frame, of the roll body, and a bottom frame is fixedly connected to one side of the surface of the main frame; an output shaft is arranged at the left end of the roller body, a speed reducer and a first motor are sequentially arranged on the outer surface of the output shaft from right to left, and a supporting table is arranged at the bottom end of the first motor. The abutting frame abuts against the surface of the first connecting plate when moving downwards, the grinding wheel body is still in a moving state after the dressing roller abuts against the surface of the grinding wheel body, the grinding wheel body with defects on the surface can be dressed through rolling friction ...

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28-07-2023 дата публикации

High-energy laser/microwave integrated protective radome with narrow-band light absorption function

Номер: CN116505255A
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The invention relates to a high-energy laser/microwave integrated protective antenna housing with a narrow-band light absorption function, which excites surface plasmas by etching different sizes of sub-wavelength (0.01-2 times of wavelength) open pore array structures on a metal film to form a surface plasma enhanced light transmission effect on light with a specific wavelength, and improves the light absorption efficiency of the antenna housing. Meanwhile, movement of an infrared transmission peak of an atmospheric window is regulated and controlled, the effect of filtering electromagnetic waves of different wave bands is achieved, a continuous conductive structure is formed on the metal part, except for the perforated structure, of the metal film, and the electromagnetic waves are shielded; the antenna protective cover further comprises a quartz film which is plated on the surface of one side of the metal film and has the thickness of 0.1-0.6 [mu] m, so that the antenna protective cover ...

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