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 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 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 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 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 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 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 provides a superhigh-frequency radio frequency identification micro-strip conformal yagi antenna. The superhigh-frequency radio frequency identification micro-strip conformal yagi antenna comprises a dielectric substrate, active oscillators, guiding oscillators, reflection oscillators, a micro-strip line and a feeder line. The active oscillators, the reflection oscillators and the guiding oscillators are etched on the dielectric substrate through the aluminum or copper etching technology or printed on the dielectric substrate through the printing technology. The guiding oscillators are distributed on the front face of the dielectric substrate at equal intervals side by side and in parallel. The reflection oscillators are located on the rear of the active oscillators and the back face of the dielectric substrate. Each active oscillator is composed of two quarter-wave oscillators, and the active oscillators are parallel with the guiding oscillators and the reflection oscillators and located on the front face and the back face of the dielectric substrate. The micro-strip line is perpendicularly connected to the active oscillators and the reflection oscillators and connected to the contact of the feeder line in parallel for short circuit protection, and the feeder line is connected to an antenna interface of a superhigh-frequency radio frequency identification reader-writer.

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 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 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.