43 results about "Transmission system" patented technology

The invention relates to a ground electrode circuit grounding protective system of a high-voltage DC transmission system. The system is provided with two parallel ground electrode circuits respectively connected in series with a high-voltage DC breaker, sets an allowable range of current differences of two ground wires and an allowable range of the subtraction of the line current sum of the two ground wires from the line current difference of the two ground wires and then sequentially executes the following control program: (1), reading currents of the two ground wires; (2), judging and comparing whether an absolute value of the current difference of two ground wires is larger than the allowable range thereof, if the absolute value is not larger than the allowable range, returning to the step (1); if the absolute value is larger than the allowable range, (3) then, judging whether the subtraction of the line current sum of the two ground wires from the line current difference of the two ground wires is smaller than or equal to the allowable range; if the subtraction is smaller than or equal to the allowable range, returning to the step (1); and if the subtraction is not smaller than or equal to the allowable range, enabling the high-voltage DC breaker which is connected in series with the ground wire with larger line current to trip and terminate the program. The system can avoid the imbalance of the ground electrode circuits due to the failures of the ground electrode circuits and protects the caused DC transmission system to be closed down.

A master unit and a remote unit is provided for a multiband transmission system for distributing and combining signals of at least one wireless communication network and at least one digital network. A reference frequency generator is arranged in the master unit, the reference frequency generator being designed to clock a master modem for converting the signals of the at least one digital network. The reference frequency signal emitted by the reference frequency signal is restored via a reference frequency receiver and is used for closing a remote modem that is located there for demodulation.

In order to transmit high-speed digital signals of several tens of GHz through differential lines, a signal transmission system for transmitting digital signals between circuit blocks via signal transmission lines is provided by connecting a ground-referenced differential line to a non-ground-referenced differential line, Each circuit block basically includes a functional circuit, a receiving/transmitting circuit formed separately from the functional circuit, and an impedance-matched transmission line (115) formed between the receiving end and the transmitting end of the receiving/transmitting circuit; reference ground (110) The differential line (105) is drawn from the differential output driver, and a differential signal line is formed symmetrically with respect to the ground (110) in the circuit block. In the signal transmission line (115), there are only differential pair lines that are not referenced to ground (111, 112) extend directly from differential signal lines arranged symmetrically with respect to ground potential.

The invention discloses an infant incubator compatible with magnetic resonance, comprising an incubator cover (1), an incubator stand (2) and a bed, wherein a transmission control system (9) is disposed in the incubator stand (2); cover doors (3) are disposed at the both sides of the incubator cover (1); the bed disposed in the incubator cover (1) is a telescopic bed (4); a heating pad (5) for supporting and assisting the telescopic bed (4) is disposed at the lower end of the telescopic bed (4); a radio-frequency coil is surrounded in the incubator cover (1); and the transmission control system (9) comprises a temperature control system, a humidity control system, an alarm control system and a transmission system. By utilizing the structure, the radio-frequency coil can perform scanning imaging on any part of the body of an infant, and the operation is performed at a constant temperature in the incubator, so that the quality of the scanning imaging can be remarkably improved; and by using a wireless transmission signal, the hidden danger generated by a wired conductive wire is avoided, so that the life safety of the infant in the incubator body is ensured.

The invention relates to a transmission method and a transmission system and a transmission device of a multicast/broadcast business MBMS. A high speed sharing data sending entity is arranged in a wireless accession network side and a high speed sharing data receiving entity is arranged in an equipment side of user. The invention is characterized in that the method comprises: the high speed sharing data sending entity of the wireless accession network sends a MBMS data packet to the equipment side of the user in a high speed downstream grouping accession transmission way; the high speed sharing data receiving entity in the equipment side of the user receives the MBMS data packet. The invention embodiment realizes providing transmission of the MBMS data packet in downstream sharing channel in the high speed downstream grouping accession transmission way via arranging the high speed sharing data sending entity in the wireless accession network side and arranging the high speed sharing data receiving entity in the equipment side of the user, so as to improve transmission speed of the MBMS.

The invention belongs to the field of environment protection machinery and relates to a portable rubbish advertisement cleaning machine for cleaning rubbish advertisement adhering to the plane and a cylindrical face. The portable rubbish advertisement cleaning machine is characterized by mainly comprising a machine body, a power source, a transmission system and a cleaning system. The cleaning system comprises a cleaning mechanism, a water spraying plate included angle control mechanism and a telescopic rod, wherein the cleaning mechanism fixed to water spraying plates and is composed of small water-proof motors and disc brush heads, and the small motors drive the disc brush heads to rotate. The water spraying plate included angle control mechanism is arranged at the front end of the telescopic rod and is formed by connecting a threaded tube and the water spraying plates through a hinge, and the rotating threaded tube can change an included angle between the water spraying plates. The portable rubbish advertisement cleaning machine has the advantages that advertisements adhering to the plane and the cylindrical face can be cleaned, the advertisements of different paper hardnesses can be cleaned by replacing the brush heads, and the cleaning range can be controlled by adjusting the section number of the telescopic rod. The portable rubbish advertisement cleaning machine is simple in structure, low in cost, convenient and practical.

The invention provides a method for extracting a drum load spectrum of a cutting unit of a drum shearer. The method comprises the steps of obtaining a coal rock occurrence condition of a rock sample of a coal rock; testing a stress condition of a single cutting tooth of a drum of the cutting unit of the shearer to obtain a mean load model of the single cutting tooth; randomizing the mean load model of the single cutting tooth to create a cutting load random theoretical model of the single cutting tooth; according to the cutting load random theoretical model of the single cutting tooth, superposing three-way cutting force of the single cutting tooth to obtain a drum load spectrum model of the cutting unit of the drum shearer; and performing transient response analysis on each part of the drum according to the drum load spectrum model of the shearer to obtain a load spectrum of each position of each part of the drum. According to the method, random load models of the single cutting tooth are superposed to obtain random three-way force and three-way moment in the mass center of the drum, so that load input bases can be provided for subsequent calculation, analysis, optimization design and the like of a transmission system of the cutting unit of the shearer.

The invention relates to a transmission system structure of a wind generating set, and in particular to a main bearing assembly of the wind generating set. The main bearing assembly of the wind generating set comprises an outer shaft, an inner shaft, a front bearing and a back bearing; the inner shaft is arranged in the outer shaft, the front bearing is arranged between one end of the outer shaft and one end of the inner shaft, and the back bearing is arranged between the other end of the outer shaft and the other end of the inner shaft; and a first flange is arranged at one end of the inner shaft, a second flange is arranged at the other end of the inner shaft, and a connecting flange is arranged on the wall of the outer shaft. The main bearing assembly has the beneficial effects that the structure is simple, the weight is small, and the cost is low; and the main bearing assembly is wide in application scope, and can be used on the set, in a machine cabin, of a transmission system and can also be used on a direct drive set, between the machine cabin and an impeller, of a power generator.

The invention discloses a horizontal biaxial tension testing machine and a tension testing method thereof. The machine comprises a main body structure (1), the main body structure is a machined large-caliber thick-walled steel tube, the peripheral surface of the main body structure is horizontally uniformly provided with hollow jacks (3), and every hollow jack is fixedly connected with the main body structure through a flange plate (2). Every hollow jack is sequentially connected with a pressure sensor (4), a hexagonal lock cap (5), a pull rod (6) and a combination jig to form a transmission system. The surfaces, connected with the flange plates, of the main body structure are processed planes. The combination jigs are connected to the pull rods and can linearly move with the pull rods. The combination jigs are used to clamp samples. The invention also provides a method for carrying out biaxial tension testing by using the horizontal biaxial tension testing machine. The horizontal biaxial tension testing machine has the advantages of compact structure, simple form, convenience in adjustment, stability in working, achieving of simultaneous and centrically centrosymmetric loading, and various test functions.

The invention provides an uplink system of a subcarrier multiplexing optical network of filter based multicarrier modulation. The system comprises access control modules, filter based multicarrier modulation modules, subcarrier modulation modules, a multiplexing module, a feed line type fiber, a de-multiplexing module, photoelectric detectors, subcarrier demodulation modules and uplink data reception modules that are successively connected. Data generated by the access control modules is modulated in the filter based multicarrier modulation method, modulated user data is modulated to different optical subcarriers and transmitted via RF subcarrier modulation of optical carrier waves, and data from different units is multiplexed to uplink fiber channels. Filter based multicarrier modulation technology is combined with subcarrier multiplexing technology so that frequency spectrum resources of uplinks are utilized in high efficiency, interference among symbols and subcarriers of uplink users can be effectively resisted, and higher transmission speed and frequency spectrum frequency can be supported.

The invention is concerned with a kind of ropeway vehicle and its exported ropeway. The ropeway vehicle relates to carriage and motor walking framework, and the motor walking framework relates to motor and its transmission system. The motor walking framework is on the top of carriage and there is walking wheel on top of carriage, and the walking wheel connects with the motor transmission system on the tightwire of ropeway. The walking control framework to control the walking framework is inside of the carriage. The exported ropeway relates with a group of rack pole having across arm and fixed with tightwire hanging rack. There is tightwire for walking of ropeway vehicle among each tightwire hanging rack. It reduces cost for without drawing station as a independent traffic manner with once investment and running cost, especially for some places to build normal road with difficult and can be arrived with normal vehicles.

The invention provides a video stream transmission system and method. The system comprises a video coding sending end, a switch and a video decoding receiving end; the video coding sending end, the switch and the video decoding receiving end are in communication connection in sequence; the video coding sending end is used for coding the received video stream into a shallow compressed video streamand a deep compressed video stream, and sending the shallow compressed video stream and the deep compressed video stream to the switch; the switch is used for sending the shallow compressed video stream and the deep compressed video stream to a video decoding receiving end; the video decoding receiving end is used for detecting a network environment and receiving a shallow compressed video streamand/or a deep compressed video stream according to the network environment; the received video stream is decoded. In the mode, the video stream transmission system can automatically transform the deepcompressed video stream and the shallow compressed video stream according to the change of the network environment, the stability of video transmission is improved, and the satisfaction degree of users is improved.

The invention relates to a synchronous hydraulic transmission system, which consists of four modules, namely a water supply module, a control valve bank, a synchronous hydraulic cylinder group and a water-compensating exhaust module, wherein the water supply module supplies water to the system through a water pump; the control valve bank is a high-flow three-position four-way valve; the synchronous hydraulic cylinder group is formed by connecting a sucker rod cavity of a large hydraulic cylinder and a rodless cavity of a small hydraulic cylinder in series through an intermediate communicating pipeline; and the intermediate communicating pipeline is connected with a pipeline and the water-compensating exhaust module respectively. Adopting tap water as a hydraulic transmission medium, the synchronous hydraulic transmission system has the advantages of energy conservation, environmental protection and accurate positioning, prevents hydraulic oil from polluting water quality, meets the requirements of special application occasions, and can be applied in engineering environment of subaqueous elevating stages, the start and stop of water conservancy gates, shipping machines, mining machines and the like.

The invention discloses an alarming data acquisition and transmission method, which comprises the following steps: an acquisition thread for acquiring alarming data and a transmission thread for transmitting the alarming data are constructed; the acquisition thread is used for acquiring the alarming data; an alarming data queue for storing the alarming data is built, and the acquisition thread is used for putting the acquired alarming data to the alarming data queue to realize storage of the alarming data; and the transmission thread is used for taking the alarming data out from the alarming data queue and transmitting the alarming data. The invention also discloses an alarming data acquisition and transmission system. Compared with the prior art, the method and the system of the invention improve the alarming data acquisition/transmission stability on the basis of improving the alarming data acquisition and transmission efficiency, and acquisition/transmission thread blocking caused by acquisition/transmission operation timeout can be avoided maximally.

The invention provides a key block dynamic search system and method based on an image recognition technology, and relates to the technical field of geotechnical engineering informatization. The systemcomprises an image acquisition system, a computer operation system, a remote control system and a wireless transmission system. The image acquisition system comprises an image acquisition device, a laser range finder, an auxiliary lighting device and a marker post, wherein the laser range finder is installed on the image acquisition device; And the auxiliary lighting device and the marker post are placed at positions closer to the tunnel face. The computer operating system comprises an image processing module, a block searching module and a key block instability dynamic simulation module, andis used for processing the acquired image and then searching a movable block; The remote control system comprises a data storage module and an abnormal data processing module and is used for storingdata and feeding back information. The wireless transmission system is used for connection between the systems. The device is simple and convenient to use, high in working efficiency and high in practicability.

The invention relates to the technical field of float glass manufacturing equipment, in particular to the technical field of switchable transmission roller tables, and discloses a switching method for a switched float glass transition roller table transmission system. In the method, two kinds of speed measuring devices, a controller and an acoustic-optical alarm device are arranged on a transition roller table; when the roller table normal works, an annealing kiln transmission mechanism provides power for transition rollers, a motor on an annealing kiln actuating mechanism side drives a reducer to drive an orthogonal gearbox to work at an output speed lower than that of an orthogonal gearbox on an annealing kiln transmission mechanism side, only perform follow movement and not to provide power for three transition rollers; and if any position on the annealing kiln transmission mechanism side fails and cannot work, the speed measuring sensors do not send pulse signals to the controllerany more, the controller drives a standby motor to run at a normal speed and drive the three transmission roller to rotate, and the orthogonal gearbox on the annealing kiln transmission mechanism side does not provide power for the three transition rollers.

The invention relates to a rail transit on-board passenger information transmission system based on the WiFi technology. The rail transit on-board passenger information transmission system is used for transmitting on-board passenger information to a mobile client side of each passenger and comprises a master controller and a switch which are arranged in a cab, wherein a WiFi module is arranged in each compartment, and each passenger carries the mobile client side with an application program installed. The master controller transmits the on-board passenger information to a local area network in a train after acquiring the on-board passenger information, the switch receives the on-board passenger information and forwards the on-board passenger information to the WiFi module in each compartment, the WiFi module transmits the on-board passenger information to the corresponding mobile client side, and each mobile client side analyzes and displays the on-board passenger information. By means of the rail transit on-board passenger information transmission system based on the WiFi technology, the on-board passenger information can be transmitted to mobile client sides of passengers in real time so that the passengers can know about running and arrival situations of the current train.

The invention relates to a device and craft for using fluidized bed to burn kerogen. The raw oil and kerogen are transmitted into the boiler combustion device through the transmission system. The device includes fluidized bed boiler, vortex separator, and ash particle combustion system and ash dredge reclaiming device. In the boiler, the hot wind enters with small aperture speed and hot fluidized speed through the directional cap, the wind is divided into the first wind and the secondary wind; the wind quantity can be adjusted, maintains the stability of the bed and homogeneity of temperature, the temperature is maintained between 850deg.C-920deg.C. The smoke is separated through the separator, the raw particle returns into the furnace to be burned, the residue tail gas reclaims heat through several heat exchangers, and the ash dredge in the furnace is discharged out of the dredge colder with high wind quantity and pressure through the electric dust eliminator, which can be used as cement mixing material. The combustion intensity and efficiency are high, the contamination is little.

The invention relates to a transmission shock absorber which comprises an input motor rotor, an input disc and an input flange. The motor rotor is connected with the input disc. The input flange is connected to an input flange cover through a bolt connecting piece and connected with an input gear through a connecting device. A connecting disc in the connecting device is communicated with the inner center of the input flange. The two ends of the connecting disc are in contact with the inner wall of the input gear and the connecting disc is connected and fixed through a bolt penetrating through the inner center of the whole input flange. The input disc and the input flange cover are connected through a damping spring device. An elastic piece is arranged at the step end of the input disc in a sleeved mode and fixed to the input disc through a connecting piece. The elastic end of the elastic piece is pressed on the damping spring device. The transmission shock absorber has the advantages that the input disc and the input flange cover are elastically connected, so that large rotational inertia of the motor rotor is isolated and gear shift impact is reduced; meanwhile, parameters of the shock absorber are dynamically simulated through a transmission system, actually-collected data are substituted to conduct optimal computation, so that the effect is remarkable, noise of a motor and vibration caused by a transmission are reduced, a transmission shell is not damaged, and therefore the gear shifting quality and the automobile driving performance are improved.

A differential mechanism in the vehicle transmission system comprises a planetary assembly, on the casing of which there are several input gears. The invention can reduce not only the size of the input gears, but also the wear of the input gears when transferring the torque of the several power producers.

The invention provides a gas filed well site power supply and data acquisition transmission system including a cabinet which is at least equipped with a hub, a well site RTU, an industrial switch, a video server, a wireless data transmission module, a host computer and a power module, the input end of the hub is connected with a well site instrument, the output end is connected to the well site RTU, the well site RTU and the video server are in communication with the wireless data transmission module via the industrial switch, the wireless data transmission module is connected with the host computer, and the power module supplies power to the equipment in the cabinet. The system arrangement method includes that the well site RTU, a DC voltage transmitter, and the power module are arranged at the upper layer of the cabinet, the industrial switch, the wireless data transmission module, and the video server are arranged at the middle layer, and a surge protector, an air switch, the hub, and a binding post are arranged at the lower layer. The system integrates data acquisition, transmission, control and power supply modules in one, is in modular design, integrally supplies materials, and achieves the gas field well site data acquisition, control, communication and power supply functions.

The invention discloses a drum type no-tillage seeding eccentric wheel dibbling mechanism, and belongs to the agricultural seeding machines. The drum type no-tillage seeding eccentric wheel dibbling mechanism comprises a machine frame, a seed box, a drum, a rapid planting distance changing type seeder, a seed protection plate type blocking opening and a transmission system. A tractor pulls a drum type no-tillage seeding machine to move forwards, land wheels transfer power to a drum transmission shaft through chain transmission, and the drum transmission shaft transfers power to the rapid planting distance changing type seeder through chain transmission. The seeder and the drum are in the eccentric interior tangent position relation. The rotation of the drum depends on ground friction. A duck-billed dibbling machine rolls forwards along with the drum inside the drum. Seeds placed in the seed box are conveyed into the seed box in the rapid planting distance changing type seeder through a seed conveying pipe. The seed protection plate type blocking opening seals a long hole, corresponding to the duck-billed dibbling machine, in the drum, and only five long holes in the lower end are reserved in the open state. When rotating to the specific position, the duck-billed dibbling machine will penetrate through the long hole formed in the drum to pass through straw to enter soil, and the dibbling process is finished.

Disclosed in the invention are an FSK signal producing apparatus, a method and an application. The apparatus includes a first MZ modulator, a second MZ modulator and a combination unit. By inputting a first control voltage to a control electrode of the first MZ modulator, an output end of the first MZ modulator is enabled to output an inverting modulated optical signal. By inputting a second control voltage to a control electrode of the second MZ modulator, an output end of the second MZ modulator is enabled to output a non-inverting modulated optical signal. Combination of the non-inverting modulated optical signal and the inverting modulated optical signal is realized by the combination unit, thus the output of an FSK signal is realized. The apparatus utilizes a small number of optical devices, has a compact structure and greatly simplifies the structure of an FSK modulator. In addition, the FSK signal producing apparatus is directly driven by data signals which do not include sinusoidal signals, which can avoid performance and speed limitations for transmission of the FSK signal caused by the frequency of the sinusoidal signals. The produced FSK signal has a good shape of eye pattern in the high speed optical transmission system, and can realize error-free transmission in theory with a low loss and an excellent performance.

The invention relates to a suspended-type circular stereo parking garage. The suspended-type circular stereo parking garage comprises two annular tracks, transmission systems and a plurality of parking spaces. The two annular tracks are horizontally arranged on the same plane and are spaced at the distance of more than one parking space. Each annular track is internally provided with a plurality of sets of idler wheels, and the multiple parking spaces are hung on the idler wheels through ropes and divided into the upper layer and the lower layer. The transmission systems are arranged on the inner sides of the annular tracks, and the transmission systems drive the idler wheels to move, so that horizontal moving of the parking spaces is achieved. Rope winders are connected to the ropes for hanging the parking spaces. By adjusting the length of the ropes, rising and falling of the parking spaces are achieved, the structure is simple, parking and picking-up are convenient, and the suspended-type circular stereo parking garage is conveniently transformed in an existing parking place.