81results about How to "Guaranteed one-way" patented technology

The invention discloses a photovoltaic grid-connected three-level inverter, and relates to equipment which is used for converting irreversible direct-current power input of a semiconductor device with a control grid into alternating current power output and is used together with a power supply system of a power supply. The inverter consists of a photovoltaic array module, six identical switching tubes, two identical diodes, two groups of identical capacitors, two identical inductors and a power grid. The photovoltaic grid-connected three-level inverter does not generate common mode current, has low differential mode voltage, low current ripple and high efficiency, and overcomes the defect that the three-level inverter needs direct-current input voltage which is about two times that of a full-bridge inverter in the prior art.

The invention relates to a hinge parallel type elliptical vibration cutting flexible device and belongs to the technical fields of ultra-precision cutting and machining of complex optical parts hard to cut. A first piezoelectric stack and a second piezoelectric stack are respectively mounted in a first hole and a second hole of an integrated flexible hinge through pretightening screws. A first displacement measuring retaining plate and a second displacement measuring retaining plate are respectively fixedly connected with two displacement measuring retaining plate mounting holes of the integrated flexible hinge through fastening screws. A first capacitive displacement sensor and a second capacitive displacement sensor are respectively correspondingly mounted on a first displacement sensor clamp seat and a second displacement sensor clamp seat. A diamond cutter is fixedly connected with the groove at the front end of the integrated flexible hinge. The hinge parallel type elliptical vibration cutting flexible device has the advantages that the elliptical orbit of a diamond cutter point in a space can be achieved precisely, parameter adjusting range is large, the flexible device can be mounted on optional machine tools, and certain universality is achieved.

The invention relates to a bi-piezoelectric vertical elliptical vibration cutting device suitable for vertical type excircle machining, and belongs to the technical field of micro-nano and ultra-precision manufacturing and processing of complex optical elements of difficult-to-process materials. A series connection integrated flexible hinge substrate is connected with two piezoelectric stacks respectively; a displacement measurement baffle is installed on the series connection integrated flexible hinge substrate; a capacitive displacement sensor is installed on a displacement sensor holder; the displacement sensor holder is installed on the series connection integrated flexible hinge substrate; and a diamond cutter is installed at the front end of the series connection integrated flexible hinge substrate through tightening screws. The bi-piezoelectric vertical elliptical vibration cutting device has the advantages as follows: the structure is novel; the series connection integrated flexible hinge substrate is formed by one-time processing; the whole structure is simple relatively; the device is easy to manufacture; and errors caused by assembly are reduced to a great extent. The bi-piezoelectric vertical elliptical vibration cutting device is small in size and low in mass and can realize high-frequency elliptical vibration cutting easily.

The invention relates to a precision working stage, and discloses a movement mechanism of a one-dimensional micro-positioning platform. The movement mechanism comprises articulated mechanisms which are distributed in a plane and a piezoelectric actuator which drives the articulated mechanisms. The articulated mechanisms are four double-parallel multi-bar flexible mechanisms which respectively are A, B, C and D, wherein the double-parallel multi-bar flexible mechanism A and the double-parallel multi-bar flexible mechanism B are parallel to each other, vertical hinges at two ends of the double-parallel multi-bar flexible mechanism A and the double-parallel multi-bar flexible mechanism B are connected with the middle sections of the double-parallel multi-bar flexible mechanism C and the double-parallel multi-bar flexible mechanism D; the middle sections of the parallel double-parallel multi-bar flexible mechanism A and the double-parallel multi-bar flexible mechanism B are connected with the piezoelectric actuator; and the tail ends of the double-parallel multi-bar flexible mechanism C and the double-parallel multi-bar flexible mechanism D are fixedly connected with a working table through bolts. The problem of the prior art that translation scope of the whole device is reduced caused by slant of displacement due to out-of-balance of stress of the middle portion of a micro-positioning device is solved, the movement mechanism of the one-dimensional micro-positioning platform has the advantages of being high in sharpness of separation, good in system rigidity, capable of improving movement scope and the like.

The invention provides a secure transmission device. The secure transmission device comprises a transmitting end PC interface protocol conversion unit, a transmitting end control unit, a FIFO unidirectional memorizer, a receiving end control unit and a receiving end PC interface protocol conversion unit, the transmitting end control unit reads data from the transmitting end PC interface protocol conversion unit according to certain time sequence and writes the data into the FIFO unidirectional memorizer, and the receiving end control unit reads the data from the FIFO unidirectional memorizer and transmits the data to the receiving end PC interface protocol conversion unit. The invention further discloses another secure transmission device comprising a transmitting end transmission device and a receiving end transmission device. In the secure transmission device provided by the invention, the FIFO (first in first out) unidirectional memorizer is used, and the unidirectional property of the data transmission is ensured on the aspect of hardware, so that data of an extranet can be transmitted to an intranet, but the data of the intranet cannot be transmitted to the extranet.

The invention relates to a non-resonant three-dimensional elliptical diamond vibration cutting flexible unit and belongs to the technical field of super-precision cutting and machining of complex optical parts of materials difficult to machine. An upper flexible hinge and a lower flexible hinge are fitted in the vertical direction. The upper flexible hinge is connected to a first lower flexible hinge connecting hole and a second lower flexible hinge connecting hole of the lower flexible hinge respectively through a first upper flexible hinge connecting hole and a second upper flexible hinge connecting hole. A first piezoelectric stack and a second piezoelectric stack are mounted on the lower flexible hinge respectively through a first pre-tightening threaded hole and a second pre-tightening threaded hole. A third piezoelectric stack is mounted on the upper flexible hinge in a pre-tightened manner through a third pre-tightening threaded hole. A diamond tool is mounted on the threaded holes of the upper flexible hinge through bolts. The non-resonant three-dimensional elliptical diamond vibration cutting flexible unit has the advantages that elliptical path of a tip of the diamond tool in any spatial plane can be accurately realized, parameter regulation range is wide, and the flexible unit is applicable to any machine tool and has certain universality.

The invention discloses a novel automatic gas regulating mechanism for a constant-temperature fuel gas water heater. The novel automatic gas regulating mechanism comprises a gas distributing rod, a valve body, a valve element and a valve element rotary drive mechanism, wherein the valve body is communicated with a fuel gas channel of the gas distributing rod and equipped with a fuel gas inlet; a valve cavity hole with a cone-shaped hole structure is formed in the valve body; the valve element is a tapered circular table structure corresponding to the valve cavity hole. According to the novel automatic gas regulating mechanism disclosed by the invention, the valve element with the tapered circular table structure is matched with the tapered valve cavity hole, the valve element is pressed by elastic devices such as the spring, the valve element can be tightly fitted with the valve cavity hole, so that the gap between the valve element and the valve cavity hole can be neglected, the sealing performance of the valve body is guaranteed; gap gas leakage in the original design is almost absent, the one-way performance of the valve body is guaranteed very well, and the regulating precision of the valve element is relatively high and reliable.

The invention relates to a parallel-type oval vibration turning device applicable to vertical type excircle machining, belonging to the technical fields of micro-nano and ultraprecise manufacturing and machining on optical elements made of difficult-to-machine materials. Two piezoelectric stacks are connected with a parallel integrated hinge base, two displacement measurement baffles are connected with the parallel integrated hinge base, capacitance displacement sensors are mounted on displacement sensor holders, the displacement sensor holders are mounted on the parallel integrated hinge base through tightening screws, and a diamond cutter is mounted on the front end of the parallel integrated hinge base through tightening screws. The parallel-type oval vibration turning device has the advantages that the structure is novel, the adopted parallel flexible hinge can eliminate the movement generated by driving, and in the spatial structure, the flexible hinges are symmetrically distributed, so that the mutual coupling motion is reduced, the counting process is simple, and accurate control is easily realized.

The invention relates to the medicine field, especially relates to a perfusion device, which can rapidly carry out connection and perfusion when obtaining a supplied liver in an organism (liver) transplant operation, and specifically relates to a supplied-liver quickly-fixed perfusion device for liver transplant. The perfusion device comprises a puncture guiding device and a connecting ring for connecting a perfusion pipe. The puncture guiding device is a puncture steel wire, a contractible and magnetic ring is arranged on the top end of the steel wire, the top end of the connecting ring is in a conical shape, the bottom of the connecting ring is connected to a perfusion pipe, a unidirectional valve is arranged in the bottom of the connecting ring, the top of the connecting ring is made of an iron-containing material, the top of the connecting ring is matched with the contractible ring, and the top of the connecting ring and the contractible ring absorb on each other through magnetic force. The operation of the device is simple, practicable, and pertinent. The device is mainly used to carry out rapid perfusion when obtaining a supplied liver in a liver transplant operation, and is capable of rapidly and effectively performing liver perfusion so as to obtain a high quality liver.

The invention discloses a computer vision based non-contact type data transmission method. The computer vision based non-contact type data transmission method comprises the steps of 1, coding and displaying an image sequence, to be specific, 101, generating a standard checking image sequence, 102, building a standard data image sequence, and 103, displaying the image sequence; and 2, decoding the image sequence, to be specific, 201, obtaining an actual checking image sequence, 202, extracting an actual mark point of the actual checking image sequence and calculating a global transformation homographic matrix, 203, extracting a vertex coordinate of each grid of the actual checking image sequence, 204, resolving each grid affine transformation parameter of the actual checking image sequence and determining binary information carried by each grid of the actual checking image sequence, 205, obtaining an actual data image sequence, and 206, decoding the actual data image sequence. As a camera lens is utilized for acquiring computer image information, single-way transmission of computer intranet and extranet information is realized, and efficient communication of computer information between a secret-relating network and a non-secret-involved network can be solved efficiently.

The invention discloses a multidirectional valve hydrocephalus shunt valve with antibacterial and anticoagulant functions, and preparation and an application method thereof, and belongs to the field of medical equipment. Two ends of a drainage tube are sealed through a silicone hose; a plurality of long seams are axially cut on the side wall at one end of the drainage tube, so as to form a valve type channel; and a hole is punched in the side wall at the other end of the drainage tube, which is served as a channel for allowing intracranial liquid to flow into the hydrocephalus shunt. At least one type of antibacterial drug permeates in the shunt valve body, so as to prevent wound from being infected; and meanwhile, anticoagulant drugs are connected with the surface of the tube wall in a surface grafting manner, so as to prevent blood corpuscle and protein in hydrocephalus from being adhered to the inner tube wall and causing lumen blockage. The shunt valve is used for the drainage of hydrocephalus from brain to other body cavities, the antibacterial and anticoagulant design can effectively prevent infection and vessel clogging in hydrocephalus shunt, the multidirectional valve design at the remote end can prevent liquid from flowing back, and the hydrocephalus shunt valve is multifunctional.

The invention discloses a reaction kettle, device and method for testing the solubility of natural gas under high-temperature and high-pressure conditions. The reaction kettle comprises a kettle body and a heating device, wherein the kettle body is internally divided into a dissolution reaction cavity and a gas pressurization cavity, the gas pressurization cavity is internally divided into a pressurization cavity I and a pressurization cavity II, and a buffer cavity is formed in the pressurization cavity I; a high-pressure sealing piston is arranged in the pressurizing cavity II to divide the pressurizing cavity II into a first pressurizing cavity II and a second pressurizing cavity II; the dissolution reaction cavity is provided with a gas sampling port, a temperature sensor, a pressure sensor and a liquid inlet / outlet; the pressurizing cavity I is provided with an air source inlet, a one-way valve I is arranged in the air source inlet and connected with the buffer cavity, the buffer cavity is connected with the dissolution reaction cavity through an air outlet pipe I, and a one-way valve II is arranged on the air outlet pipe I; and the buffer cavity is connected with a first pressurizing cavity II through a gas outlet pipe II, spacer fluid is arranged in a second pressurizing cavity II, and a pressure-bearing liquid inlet is formed in the second pressurizing cavity II. The device can accurately measure solubility of natural gas under high temperature and high pressure.

The invention provides a device for physical security unidirectional switching control of a keyboard and a mouse. The device comprises a USB interface module connected with the keyboard and the mouse. The USB interface module is connected with a real-time monitoring module, the real-time monitoring module is connected with a unidirectional transmission module, the unidirectional transmission module is connected with a plurality of analog keyboard and mouse modules through a switching control module, each analog keyboard and mouse module is connected with a host, and the real-time monitoring module is connected with the switching control module. Moreover, a warning module is connected with the real-time monitoring module. According to the device according to the scheme, on the conditions of using the same keyboard and mouse, the different hosts and displays are switched to enter different network environments such as an intranet and an extranet, data of the keyboard and the mouse can only be transmitted to the hosts, and data are prevented from being stolen from the keyboard and the mouse.

Disclosed in the invention is a cream bottle comprising a main bottle body and a bottle cover. A rotating bottom cover is arranged at the main bottle body; an annular ratchet wheel arranged at the rotating bottom cover is engaged with a clamping block that is arranged in the main bottle body and is used for limiting the unidirectional rotation of the annular ratchet wheel. The rotating bottom cover is connected with an input terminal of a drive unit; and the drive unit is connected with a lead screw arranged in the main bottle body vertically in a transmission mode. Besides, a locking element for blocking rotation of the lead screw is arranged inside the main bottle body. An upper end of the lead screw is clamped with a piston that can move axially along the main bottle body; and the piston and the inner wall, for placing a content, of the main bottle body are sealed. The lead screw pushes the piston and the annular ratchet wheel and the clamping block are engaged, so that an objective of precise and quantitative extrusion of the content can be achieved; the saved usage of the content is realized; the extrusion process becomes convenient; and thus the usage of the cream bottle becomes convenient and the controllability of the cream bottle is high.

A water mixing type exhaust gas recirculation system comprises a water-gas mixing device, a heat exchanger, a steam conveying pipe and a tail gas divided manifold arranged on an engine tail gas exhaust pipe. The heat exchanger and the tail gas exhaust pipe carry out heat exchanging. The water-gas mixing device is provided with a first water outlet and a tail gas inlet. The heat exchanger is provided with a first water inlet and a first steam outlet. The tail gas divided manifold is connected with the tail gas inlet of the water-gas mixing device. The first water outlet of the water-gas mixing device is connected with the first water inlet of the heat exchanger through a pipeline. The first steam outlet of the heat exchanger is connected with a steam inlet of the steam conveying pipe. A steam outlet of the steam conveying pipe is connected with an engine gas inlet pipe. Part of tail gas is used for simplifying a complex pressurizing structure. Meanwhile, the liquid water cleanliness is not lowered obviously. The high thermal residual value of part of tail gas is fully used, so that steam accords with the conditions of following reactions. The invention further discloses a corresponding engine.

The invention discloses a unidirectional isolation GAP. The unidirectional isolation GAP comprises a first isolation device, a second isolation device, and a data reviewing device. The first isolationdevice is suitable for being communicated with a first network, and is used to receive first data from the first network, and is used for the protocol stripping of the first data; and is used to convert original data into second data; and is suitable for the unidirectional communication with the data reviewing device, and is used to transmit the second data to the data reviewing device unidirectionally; the data reviewing data is suitable for the reviewing of the second data, and when the second data passes the reviewing, the second data can be transmitted to the second isolation device; thesecond isolation device is suitable for the communication with the data reviewing device, and is used to receive the second data from the data reviewing device; and is suitable for restoring the second data into the original data; and is suitable for the unidirectional communication with the second network, and is used for the protocol encapsulation of the original data to acquire the first data again, and then the first data is transmitted to the second network. The invention also discloses a data transmission method.

The invention discloses a gas circuit structure for an anesthesia respirator, comprising a driving gas inlet, a fresh gas inlet, an inhale port, an inhale check valve, an exhale port, an exhale check valve, a tourill and a volume cavity, wherein a flexural gas pipeline is arranged in the volume cavity, the driving gas inlet is connected with one end of the flexural gas pipeline of the volume cavity, the gas outlet end of the exhale check valve is connected with the other end of the flexural gas pipeline of the volume cavity, and the gas inlet end of the exhale check valve is connected with the exhale port; a branch pipeline is arranged in the middle of the flexural gas pipeline of the volume cavity and is connected with the gas inlet end of the tourill, the gas outlet end of the tourill and the fresh gas inlet are connected with the gas inlet end of the inhale check valve, and the gas outlet end of the inhale check valve is connected with the inhale port.

The invention discloses a mouth opening and shaping device for stomatology department examination. The device comprises an arc-shaped supporting plate, occlusion pieces, an adjusting column, a transverse plate and a collecting bag, connecting ropes are arranged on the two sides of the bottom of the arc-shaped supporting plate, the bottoms of the connecting ropes are connected with an arc-shaped cushion plate, the bottom of the arc-shaped cushion and the top of the arc-shaped supporting plate are provided with the arc-shaped occlusion pieces, the adjusting column is arranged on the surface of the top of the arc-shaped cushion, two symmetrically-arranged lighting columns are arranged on the surface of the top of the arc-shaped cushion, the inclined transverse plate is arranged on the front face of the arc-shaped cushion, a conveying pipe is arranged on the surface of the transverse plate, one end of the conveying pipe penetrates through the interior of the arc-shaped cushion, an L-shaped support is arranged at the bottom of the transverse plate, and the collecting bag is arranged at the top of the L-shaped support. According to the device, by arranging the adjusting column, the mouth opening height and opening area can be adjusted when a patient is subjected to mouth examination, and medical staff in the stomatology department can conveniently conduct examination.

The invention discloses a vertical net laying system for honeycomb porous structure cotton. A top inlet of a cotton supply channel is communicated with a filament introduction region, forward and reverse filaments introduced in the filament introduction region are perpendicular to weaving bodies passing through the cotton supply channel, a bottom outlet of the cotton supply channel is communicatedwith the top face of a horizontal conveyor belt under the channel through a cotton discharge channel, left and right reciprocating rollers at the two sides of the cotton supply channel include reciprocating roller bodies and multiple reciprocating needles arranged on the roller bodies, the reciprocating needles can include breathable needles so as to be communicated with roller inner cavities inside the reciprocating roller bodies, and left and right cotton discharging portions on the two sides of the cotton discharge channel are each composed of multiple needle rollers sequentially distributed from top to bottom. Due to the design, the weaving and crossing effect is high, the internal structure of weaving bodies can be changed, the functionality is high, the weaving bodies of the porousstructure are formed, the arranging effect on the interiors and exteriors of the weaving bodies is high, and the structure uniformity and surface flatness of the weaving bodies can be improved.

The invention discloses a light message abstract extraction method based on a new problem and belongs to the technical fields of passwords and computers. The light message abstract extraction method comprises two parts, namely initial value generation and message abstract extraction, wherein by the initial value generation part, a third-party authority mechanism generates a public non-reciprocal element sequence; by the message abstract extraction part, a digital signer and an identity checking party extract an abstract of a message, namely a digital fingerprint; and the length of the message is not more than 4096 bits; and the length of the abstract is not more than 160 bits, and the method is unidirectional, free of weak collision and desired to be free of strong collision. The method has the characteristics of short abstract, high security, high calculation speed, public technology and the like; and the method can be used for digital signing and identity checking as well as electronic finance, electronic commerce and electronic government affairs.

The invention belongs to the technical field of experimental animal breeding devices, particularly relates to a single-cage-position barrier environment breeding cage of an independent air supply system, and aims to solve the problem that the cost and the running cost of a barrier environment and an IVC system are high, and experimenters or laboratories are generally unable to bear the cost. According to the requirements of experimental steps of different experimenters, the experimental animals can leave the barrier environment at any time to carry out related experiments, and once the experimental animals bred in the barrier environment leave the barrier environment, the experimental animals cannot return to the barrier environment, which brings a lot of inconvenience to the experimenters. The single-cage-position barrier environment breeding cage of the independent air supply system comprises a cage body, an air outlet groove, an air supply system control box and a cover plate. The breeding cage solves the breeding problem of SPF experimental animals after leaving a large-barrier environment; meanwhile, cage boxes can be matched for laboratories with insufficient scientific research funds according to the number of the experimental animals, so that the expense is reduced.

The invention provides a drainage device and method for a tunnel and an underground structure. The drainage device comprises an outer sleeve pipe penetrating through a tunnel lining or the undergroundstructure when used, a core pipe and a drainage structure control unit placed in the core pipe, wherein the lower end of the core pipe extends into the upper end of the outer sleeve pipe, and the core pipe is in threaded connection with the outer sleeve pipe. A plurality of second water release holes are formed in the outer wall of the lower portion of the outer sleeve pipe; a bearing part is arranged at the lower end of the core pipe, and a plurality of first water release holes are formed in the outer wall of the lower portion of the core pipe; and the drainage structure control unit comprises a stabilizing block placed in the core pipe and located on the bearing part, a guiding sleeve, a guiding rod, a connecting piece, a sealing piece, a spring, a top cover and one or more transversedrainage pipes, wherein the lower end of the guiding sleeve is fixedly connected with the upper end of the stabilizing block; the lower end of the guiding rod extends into the guiding sleeve, and theguiding rod is in sliding fit with the guiding sleeve; the connecting piece is fixedly connected with the upper end of the guiding rod; the sealing piece is mounted at the upper end of the connectingpiece and is in liquid sealing fit with the inner wall of the core pipe; the spring is mounted on the guiding sleeve in a sleeving mode, and the two ends of the spring are fixedly connected with the stabilizing block and the connecting piece correspondingly; and the upper end of the core pipe is closed by the top cover.

The invention discloses a transparent shearing model box for a vibration table test, which comprises a permeable base and a box body with a layered structure, wherein the box body comprises a plurality of open type shearing rings and at least one reaction frame, the plurality of open type shearing rings and at least one reaction frame are sequentially superposed on the permeable base, the open type shearing ring at the lowest layer is fixedly connected with the permeable base, and when the adjacent open type shearing rings are subjected to shearing force, the adjacent open type shearing ringscan be mutually staggered to form a free field boundary condition of a seismic shearing model test; at the side opening formed by superposing the plurality of open type shearing rings, two sides of the reaction frame are respectively clamped with the above-mentioned open type shearing rings through clamping structures, and the clamping structures are used for limiting the displacement of the above-mentioned open type shearing rings in the direction vertical to the reaction frame while allowing the displacement of the open type shearing rings in the direction parallel to the reaction frame; anda transparent window for detecting the condition of the side surface of the test sample under the action of the alternating shearing force is arranged on the reaction frame. The transparent shearingmodel box for the vibration table test can more accurately observe and judge the condition of the shearing force applied to the sample.

The invention relates to a honeycomb porous structure cotton preparation system, which comprises a laying-stacking part, a combing part and a laying net part, wherein the material outlet of the laying-stacking part is communicated to the material inlet of the laying net part through the combing part, the laying-stacking part is a staggered laying-stacking system, and comprises a laying-stacking unit and a transfer unit, the combing part is a compacting puncture weaving system, and comprises a main conveying device and a finishing device, and the laying net part is a vertical laying net system,and comprises a reciprocating type cotton feeding device, a vertical cotton discharge device and a horizontal conveying belt. According to the present invention, the preparation system can simultaneously achieve the staggered arrangement between nets, between net fibers and between fibers, can achieve rich laying-stacking directions, and can form staggered multi-layer textile bodies with rich internal structures.

The invention discloses a locking device for a servo mechanism, which belongs to the field of electromechanical equipment, effectively reduces the size of the locking device through the integrated arrangement of a driving assembly, a locking assembly and a position sensitive assembly, accurately realizes the application of the locking device in an airborne missile weapon system, and realizes the locking of the servo mechanism through the corresponding matching of all parts. Accurate locking and accurate unlocking of the servo mechanism are effectively achieved. The locking device for the servo mechanism is simple in structure, high in integrity and high in integration degree, accurate locking when the servo mechanism does not work and quick unlocking when the servo mechanism works can be accurately achieved, power consumption of the locking device in the using process is reduced, online detection and output of the state of the locking device are achieved, and the locking device is suitable for popularization and application. The working accuracy of the locking device is fully guaranteed, a guarantee is provided for the working accuracy of the servo mechanism, development of the servo mechanism and related airborne missile weapon systems is promoted, and the locking device has good practical value and popularization value.