90results about How to "Reduce control links" patented technology

A semi-automatic grinder-ball grinder system for grinding ore is composed of a vibration feeder, a semi-automatic grinder with variable-speed driver and load monitor, a vibration sieve, a crusher, a sludge pump, cyclone unit with concentration, flow and granularity detections, and a ball grinder with variable-speed driver. Its control method is also disclosed.

The invention discloses a method for constructing an integrated road bed of a track traffic tunnel, which is a supporting frame method for short. Firstly, a finished track panel assembled on a base is hoisted to the constructed tunnel; and the track panel of sleepers with different forms is born through adopting a supporting frame of a lower bearing type track panel; secondly, the track panel in the construction working face is hoisted to the designed elevation; the supporting frame of the track panel is mounted to support the track panel; a transverse supporting lever is utilized to approximately fix the direction of the track panel; and finally, according to fiducial mark, the elevation of track surface, the direction of the track, level and height are adjusted to the designed positions; after the binding and welding of concrete reinforcing bars and the erection of a template of the road bed are sequentially completed, and the integrated road bed is finally subjected to concrete pouring to obtain the integrated road bed; and the steps are sequentially advanced to complete the whole construction. The method reduces control links and material waste, improves construction schedule, ensures construction quality and is mainly used for the structural construction of undergrounds, light rails, tunnels, bridges, large-scale vehicle fields and other integrated road beds.

The invention relates to an aerial three-level electric excitation motor starting control method and an aerial three-level electric excitation motor starting control device. The method comprises the following steps of: determining the controller output voltage vector in the mode of directly controlling the module value of the voltage vector and an included angle between the voltage vector and a main generator rotor, transmitting a switching signal of a three-phase full-bridge inverter in a mode of modulating a support vector machine (SVM) through a space vector, controlling the inverter to drive the main generator, and realizing the starting function of the three-level electric excitation synchronous motor. The aerial three-level electric excitation motor starting control method has the advantages that 1) the control links are fewer, a speed ring PI regulator and a current ring PI regulator are independent, and the parameters are conveniently adjusted; 2) real-time state information of the system is not required, the acquired original information of the main generator can be processed by using a complicated filtering algorithm, the information has certain robustness on transient interference, and the control performance of the system can be effectively improved; and 3) control objectives are fewer, and the comprehensive control error caused by electromagnetic interference of an exciter on the main generator can be effectively reduced.

The invention provides a fingerprint-based speed limiting device of an automatic transmission automobile, and a control method thereof, belonging to the technical field of automobiles. The problem that the highest driving speed is not limited through fingerprint identification corresponding to different identities can be solved by the invention. The device comprises a fingerprint sensor for acquiring biological fingerprints and an EMS (electronic monitoring system), wherein an electronic air throttle and a fingerprint identification controller are respectively connected on the EMS, the fingerprint identification controller is connected with the fingerprint sensor, a host interface is further connected on the fingerprint identification controller, the fingerprint identification controller is used for receiving fingerprint data detected by the fingerprint sensor, performing storage, comparison and deletion on the fingerprint data in a fingerprint database according to input signals of the host interface and outputting a set control speed limiting signal to the EMS, and the EMS is used for controlling the opening degree of the electronic air throttle. The control method comprises the following steps of: A. performing fingerprint identification and registration; B. judging the control conditions for starting speed limitation; and C. judging fingerprint information. The device and the method are based on a fingerprint identification technology and can limit the highest driving speed for different users.

The invention relates to a robot body modularization linkage device for a single-drive multi-legged robot. The device comprises a main frame, double parallelogram linkage mechanisms, hip mechanisms, grippers, a connecting frame, a crank, a power drive rod and a motor; both the parallelogram linkage mechanisms are arranged at both the sides of the main frame; the hip mechanisms are connected with the parallelogram linkage mechanisms by the grippers; double the parallelogram linkage mechanisms are connected by the connecting frame or the crank; the motor is connected with the crank by the power drive rod; and the motor drives the power drive rod to rotate, the power drive rod drives the crank or the connecting frame to rotate, the crank drives both the parallelogram linkage mechanisms to reciprocate and the reciprocating motion of both the parallelogram linkage mechanisms drives each hip mechanism to alternately move back and forth by the grippers. Compared with the prior art, the robot body modularization linkage device for the single-drive multi-legged robot has the advantages of simple structure, optimization for foot end tracks, high motion reliability and stability and the like.

A method for controlling motor set with multiple wind wheel includes collecting information of air-stream, rotary speed, voltage and load on site and transmitting them to remote computer; calculating out wind ward angle and optimum pitch of blade to obtain optimum operation mode by remote computer based on said information; sending parameter of obtained mode to local computer; commanding relevant execution mechanism to regulate pitch angle of blade and windward angle of said motor set by local computer fro making said motor set be on optimum power-generation state. The device for realizing said method is also disclosed.

The invention discloses an MVR (Mechanical Vapor Recompression) multi-level evaporation device which at least adopts two evaporators mutually connected in series and is capable of achieving a quite considerable energy-saving effect by virtue of a multi-level configuration mode. A to-be-treated waste liquid is directly adopted as a cooling medium, a vapor compressor is arranged at a secondary vapor outlet of the final evaporator, the vapor compressor, the final evaporator and the front evaporator are combined into an organic combination body, a secondary vapor pipeline and a secondary vapor compressor are omitted, and the pipeline and structure damping for vapor is greatly reduced, so that the compression efficiency is improved, energy losses are reduced, and the cost and operating cost of the whole device can be greatly lowered.

The invention provides a method for adjusting frequency based on an IEEE1588 (institute of electrical and electronic engineers) protocol and a network device. The method comprises the following steps: after a slave clock device receives messages of the IEEE1588 protocol sent by a master clock device, using first frequency information provided by a clock source module to mark timestamps on the messages of the IEEE15888 protocol; and calculating the frequency difference between the slave clock device and the master clock device in accordance with master clock information carried by the messages of the IEEE15888 protocol and the timestamps, and using the frequency difference to adjust second frequency information provided by the clock source module to be the frequency information which has the same frequency as the master clock device. According to the invention, an open-loop control system and the IEEE1588 protocol are utilized to realize the frequency synchronization, thus reducing the design cost of the system effectively, decreasing the control links and improving the accuracy effectively.

The invention discloses a pillow body lifting sensing device and a lifting sleeping pillow with the same. A pillow body lifting control switch of a pillow body lifting sensing control device comprises a plurality of normally-open type reed pipes connected in parallel, and the reed pipes are longitudinally arranged and transversely fixed to a sensing panel in a single row or two rows. The sensing panel and the reed pipes are arranged to be capable of covering the activity space of the neck of the human body on the pillow in the length and the arranging width, and the adjacent reed pipes are arranged with the distance ensuring that no blind zone exists in a testing range. A pillow head posture signal collecting system comprises a strong magnet and a fixing device for fixing the strong magnet to the neck of the human body. The pillow body lifting sensing device and the lifting sleeping pillow with the same have the advantages that the structure is simple, operation is stable, operation is safe and convenient, the height of a pillow body can be accurately changed in time according to the posture changes of people when people lie on the bed, a certain magnetic therapeutic effect can be achieved on the cervical vertebra, and the blood circulation of the neck can be improved.

The invention discloses an integrated numerical control system and an integrated numerical control machine. The integrated numerical control system comprises a shell which has a shielding effect on an electromagnetic radiation source; a power supply module, a control module, a driver module, a display module and an I/O (input/output) module are arranged in the shell, wherein the power supply module is used for supplying power for the control module and the driver module; the driver module is used for driving at least a motor; and the control module is used for sending control signals to the driver module to control the motors, acquiring the position information of the current motor and the position information of a current work bench by an encoder and a grating scale, receiving or sending control signals by the I/O module and an I/O device, processing data, and sending display information to the display module. The integrated numerical control system provided by the invention has the advantages that time consumption and signal distortion caused by signal transmission are reduced, the environmental interference is reduced, and a part of components in a control link are reduced; meanwhile, the integrated numerical control system is compact in layout, simple in connection, and low in cost.

The invention discloses a short-process integral device and a method for preparing continuous tungsten core SiC fibers by a direct-current heating method, and belongs to the technical field of preparation of SiC fibers. Firstly, a tungsten wire penetrates through an integral reactor specifically designed; and the reactor is mainly divided into three sections: the front end is a tungsten wire cleaning end section; the middle is a SiC deposition section; and the tail end is a coating deposition section. The tungsten wire is heated by a direct-current power supply; the concentration field and temperature field distribution suitable for SiC deposition stable growth can be obtained through adjusting the flow, the flowing speed and the ratio of reaction gas introduced in each section, so that the fine grain structure of the SiC fibers is guaranteed, and the high-performance SiC fibers are prepared. The method has the following advantages: the tungsten wire cleaning, the SiC deposition and the coating preparation are integrated; the space can be largely saved; the process is shortened; the production efficiency is improved; and the cost is reduced.

The invention discloses a transmission and tension control system. The system comprises a speed measuring sensor, a tension sensor and a control device; the speed measuring sensor is arranged betweenan unwinding shaft and a winding shaft and measures the radius of the unwinding shaft; the speed measuring sensor is connected to the control device and transmits data; the tension sensor measures thetension of a film belt, is connected to the control device and transmits the data; and the control device controls the rotating speed of the unwinding shaft and the winding shaft. The system has theadvantages that the equipment control response is high, the sensitivity is high, the rotating speed of the winding shaft and the unwinding shaft can be adjusted in real time, the control link is reduced, the production costcan be lowered on the premise that the equipment function and the product quality are not reduced, and the economic benefits of manufacturers can be improved.

The invention provides a fixing device for an extrusion rod of an extruding machine. The fixing device is characterized in that the extrusion rod is fixedly assembled on an extrusion beam; the fixing device comprises a pressing cover and a locking ring; the pressing cover is directly mounted on the end face of the extrusion beam; the pressing cover is provided with at least two pressing devices; and the pressing devices are used for tightly pressing the extrusion rod on the end face of the extrusion beam through the locking ring. When the extrusion rod is mounted, a gap is reserved between the extrusion rod and the extrusion beam; after the extrusion rod is mounted, the pressing devices inwards press the extrusion rod, so that no movable gap is formed between the extrusion rod and the extrusion beam, and the extrusion rod and the extrusion beam can be accurately positioned; and therefore, the fixing device is stable and reliable.

The present invention discloses an anoxic device for clinical animal experiments and relates to the field of clinical animal experimental equipment. The anoxic device comprises a closed experimental box, an oxygen concentration control system, a gas treatment system and an animal behavior observation and recording device; the oxygen concentration control system comprises a nitrogen gas source andan oxygen gas source, each of the gas sources communicates with the experimental box via pipelines and is provided with a control valve, and the oxygen concentration control system is used for regulating an oxygen concentration in the experimental box; the gas treatment system comprises a gas extracting pump and a treatment tank provided with quicklime, gas extracted by the gas extracting pump from the experimental box enters into the treatment tank to react and returns to the treatment tank, and the gas treatment system is used to control a carbon dioxide concentration, humidity and gas pressure in the experimental box; and the animal behavior observation and recording device comprises a web camera, a cloud server and a remote monitoring device for monitoring and recording animal behaviors in real time. The device realizes automatic control and automatic data collection and recording of the experimental box, is accurate in experimental results, and provides accurate data for clinicalmedical researches.

Disclosed are a blank of an automotive front pillar inner plate part and a machining method. The blank is integrally similar to the appearance of the front pillar inner plate part, the middle of the blank is straight, one end of the blank is wide, the other end of the blank is narrow, two ends of the blank are bent towards the same side, bent positions are in arc transition, the blank comprises two pieces distributed on an online blanking and machining structure unit, and the two pieces of the blank are in central symmetry. The machining method includes the steps: using two stamping dies with cavities in central symmetry for online blanking on an uncoiling blanking line; uncoiling a steel plate coil, and leading the steel plate coil to correspond to one blanking and machining structure unit when conveying the steel plate coil by the length of a blanking unit; and using an online process for blanking once to manufacture the two pieces of the steel plate blank of the front pillar inner plate, wherein the two pieces are arrayed in central symmetry. By the aid of the front pillar inner blank with the structure, material utilization rate can be increased, and cost can be reduced. Besides, the step of single blanking for rectangular blanks in subsequent machining is omitted, manufacturing procedures can be simplified, cost can be saved, control links are decreased, and precision and quality of final parts are improved.

The invention discloses an adsorption type wall climbing firefighting truck for a high building. The adsorption type wall climbing firefighting truck comprises a frame, a middle sucking disc assembly, a front sucking disc assembly, a back sucking disc assembly, a vacuum system and a vehicle-mounted firefighting device, wherein the front sucking disc assembly comprises a pair of front sucking disc devices arranged at one end, in the long edge direction, of the frame; the front sucking disc devices have front telescopic mechanisms which extend and retract in the normal direction of the frame; the back sucking disc assembly comprises a pair of back sucking disc devices arranged at the other end, in the long edge direction, of the frame; the back sucking disc devices have back telescopic mechanisms which extend and retract in the normal direction of the frame; the vacuum system is connected with the middle sucking disc assembly, the front sucking disc assembly and the back sucking disc assembly, and provides negative pressure; and the vehicle-mounted firefighting device is mounted on the frame. According to the adsorption type wall climbing firefighting truck, the obstacle crossing ability is high, and the control is relatively simple.

The invention discloses a rubber compound, a microporous rubber elastic tie plate for tram rails and a production method of the microporous rubber elastic tie plate. The microporous rubber elastic tie plate for the tram rails is prepared from the rubber compound by vulcanizing, wherein the rubber compound is prepared from the following components in parts by weight according to a formula: 100 parts of rubber, 6-10 parts of high-performance fibers, 4-7 parts of an active agent, 75-150 parts of reinforcing filler, 1-3 parts of a surface modifier, 10-35 parts of a plasticizer, 1-2 parts of an anti-aging agent, 1-2 parts of a dispersing agent, 2-10 parts of a foaming agent and 5-20 parts of a vulcanizing auxiliary. Bearing force can be resisted effectively under lower rigidity, the elasticity of the tie plate is enhanced, the production efficiency is high, few control links are needed, and the production cost can be reduced substantially.

The invention discloses an automatic lifting mechanism of a bobbin creel. The automatic lifting mechanism comprises a slewing mechanism and a double acting cylinder, a support is fixed to a textile machine frame, a positioning shaft is arranged at the upper end of the support, a cylinder installation shaft is arranged at the lower end of the support, a slewing seat is hinged to a positioning shaft, the end of a piston rod of the double acting cylinder is hinged to the upper corner of the sector edge of a slewing plate, a base is hinged to a cylinder installation shaft, the end of a piston rod of a lifting cylinder is hinged to the lower corner of the sector edge of the slewing plate, and a cylinder seat of the lifting cylinder is hinged to the cylinder installation shaft. The automatic lifting mechanism is compact in structure and fast in response; the lifting cylinder replaces a complex clutch component, an air supply system is controlled to be turned on and off via electric signals, and the automatic lifting mechanism is convenient and quick to operate and high in automation degree; when the size of yarn reels changes, the bobbin creel lifts, response time of resetting is adjusted by only adjusting air supply pressure, and simplicity and convenience are achieved.

Disclosed is a support movement centring device which is used for automatically keeping supports at the position of a designed center line when hydraulic supports of a coalface move. The support movement centring device comprises a support movement cylinder, sliding blocks, guide rails and centring mechanisms, wherein the guide rails are arranged on top beams, the sliding blocks can slide on the guide rails back and forth, and the sliding blocks are connected together through the centring mechanisms. The support movement centring device is characterized in that not more than one portion of the left side and not more than one portion of the right side of the centring mechanism of each support are in rigid connection with the centring mechanism of the adjacent support, and the rigid connection means that compression connection except gaps does not exist in a projection shadow of each centring mechanism on the horizontal plane; the support movement centring device further comprises a paralleling mechanism which enables the top beams of the supports to be kept parallel, wherein by means of the paralleling mechanism, the centring mechanisms of the supports are transversely arranged on one straight line, the straight line serves as the standard, so that the situation that the top beams are parallel to each other when the top beams are kept perpendicular to or parallel to the standard is ensured. After the structure is adopted, the centring mechanisms can automatically ensure that the distance between the center lines of the supports is equal to the designed support center distance in the process of support movement, the paralleling mechanism can automatically ensure that the direction of the supports is parallel to the advancing direction in the process of support movement, and therefore the support adjustment time can be saved, the yield is increased, and the number of control sections is reduced for automation of the whole coalface.

The invention relates to the technical field of genetic engineering, and discloses a method for constructing a T vector, in order to directionally clone a resistance gene containing a specific restriction endonuclease recognition sequence at both ends between two multiple cloning sites of the starting vector, Screen positive clones with antibiotics corresponding to the above-mentioned resistance genes to obtain T vector precursors; then digest the obtained T vector precursors with the specific restriction endonuclease, recover large fragments, and obtain T vectors; wherein, the specific restriction endonuclease The endonuclease whose recognition sequence is digested can be a restriction endonuclease whose protruding terminal site can be T, and the resistance gene is different from the resistance gene contained in the starting vector. The method for constructing the T vector in the present invention is simple and efficient, and the quality of the T vector is controlled by using the introduced resistance gene fragment during the preparation process. The T vector obtained by this method not only retains the advantages of the starting vector, but also has the characteristics of stable quality, low self-cyclization rate, and high cloning effect.