189results about How to "Realize precise control" patented technology

The invention relates to the technical field of wireless communication networks, in particular to an indoor and outdoor integrated high-precision positioning and navigation system as well as a positioning method thereof. The system comprises a map data construction unit, an indoor ultra-wideband positioning and navigation unit, an outdoor BD/GPS positioning and navigation unit, an indoor and outdoor positioning data fusion unit, a central server unit and a terminal display unit, wherein the indoor ultra-wideband positioning and navigation unit is used for performing indoor space positioning in a ranging mode, the outdoor BD/GPS positioning and navigation unit is used for performing outdoor space positioning through a Beidou satellite navigation/GPS satellite navigation system, the indoor and outdoor positioning data fusion unit is used for judging whether a positioning label is indoor or outdoor and can intelligently switch positioning modes according to the judgment result and fuse indoor and outdoor positioning manners. Problems that positioning and navigation of personnel and objects in a large-range area are difficult to realize, not high in precision and the like at present are solved, and large signal interference and positioning deviation caused by mutual interference among signals can be avoided in the ranging mode.

The invention relates to domain of special purpose vehicle and especially to a separate four-wheel steering device of vehicle and controlling means, which is mainly used in steering system of special purpose vehicle to guarantee steering behavior. The device comprises steering knuckle arm, steering hydraulic cylinder, electro-hydraulic proportional control valves, and accumulator, easing valve, hydraulic pump, clarifier and electronic control system. The invention is characterized in that every wheel is controlled by independent oil-hydraulic cylinder, electronic control system comprises steering emulator, signal processor and measuring apparatus of displacement line and hydraulic pump driven by engine in steering hydraulic system controls hydraulic cylinder of steering system via electro-hydraulic proportional control valves of steering system. Hydraulic cylinder connects with linear movement pickup to feed variable of displacement line of hydraulic cylinder back to CPU. System adopts closed-loop control. Control circuit equips system failure diagnosis element to realize alarm when system steering error occurs and steering mode switching control unit to complete steering mode switching of vehicle.

The invention discloses a directly operated and pilot operated hybrid multi-connection solenoid valve. At least one pilot operated valve is arranged on the valve body; the pilot operated valve is provided with a main valve seat A; the main valve seat A is provided with a valve gate A consisting of a membrane plate A and a membrane A; the upper part of the membrane plate A is provided with a guidehole and the periphery of the membrane plate A is provided with side holes; a conduit A is arranged in a backpressure chamber A of the valve body; a piston A is arranged in the conduit; the lower endof the conduit A is fastened to the periphery of the membrane A; and an electromagnetic coil A is arranged on the periphery of the conduit A. At least one directly operated valve is arranged on the valve body, and is provided with a main valve seat B; the main valve seat B is provided with a valve gate B consisting of a membrane plate B and a membrane B; the membrane B is provided with a special hole; the middle of the membrane plate B is provided with a guide hole; a conduit B is arranged in a backpressure chamber B of the valve body; a piston B is arranged in the conduit; a protrusion structure contacted with the lower end of the conduit B is arranged on the membrane plate B; the valve gate B is positioned on the main valve seat B; and the valve gate B corresponding to the main valve seat B is closed. The directly operated and pilot operated hybrid multi-connection solenoid valve is applied to an electromagnetic water feeding valve of an electric washing machine.

The invention discloses a fully-electric ultra-high speed injection molding PVT (Pressure Volume Temperature) online measurement and control method. By using a melt metered through plasticization in a cylinder as an object, a thermodynamic state (P0, T0, V0) of a highly-compressed melt before injection as a control starting point and the thermodynamic state (P1, T1, V1) of the melt in the cylinder after injection molding as a control ending point, through online detection of a PVT relation characteristic of a polymer in an ultra-high speed injection molding process, by depending on a high-pressure control system and a high-response executing mechanism of a fully-electric ultra-high speed injection molding machine and using the PVT relation characteristic of the ultra-high speed injection molded polymer as the guidance, precision control of ultra-high speed injection molding is realized. The fully-electric ultra-high speed injection molding PVT online measurement and control method has the advantages of high control precision and high cost performance.

The invention relates to a precise thermal control mechanism of a focal plane detector, and the precise thermal control mechanism comprises a vacuum box body, a refrigerating assembly, a cold screen assembly, a heating assembly and a temperature collecting unit, and the precise thermal control mechanism also comprises a heat insulating layer which is arranged at the outer side of the vacuum box body and the outer side of the heating assembly, the refrigerating assembly comprises a refrigerator substrate, at least one detector refrigerator, at least one cold screen refrigerator, a heat tube assembly and a heat radiation plate. Due to the adoption of the precise thermal control mechanism, the technical problems that the quick variation of the temperature under the same working mode is difficult to realize because the temperature control of the traditional photoelectric detector thermal control mechanism mainly depends on the passive heat radiation way can be solved, a way combining the initiative refrigeration and the initiative heating is adopted, by the reasonable design of a thermal control system structure, not only is the quick variation of the temperature of the detector realized to meet the temperature requirement under different working modes, but also the temperature range can be precisely controlled, and the working reliability of the system is high.

The invention relates to a sand supply amount control system for post-mixing type high-pressure jet cleaning, and a method thereof. The system comprises: a jetting device; a supplied sand stirring barrel connected with the pipeline of the jetting device, wherein a slurry containing hard abrasive particles and an aqueous medium is arranged in the supplied sand stirring barrel, and the pipeline of the supplied sand stirring barrel is connected with a standby sand box for supplying the hard abrasive particles to the supplied sand stirring barrel; a control device in communication connection with the standby sand box and a weight measuring device arranged at the bottom of the supplied sand stirring barrel respectively; a granularity screening device, a sand-water separation device, a water filtering device and a supercharging device which are connected with the pipeline of the supplied sand stirring barrel, wherein the supercharging device is connected with the jetting device; and a collecting device arranged at the bottom of the jetting device and connected with the sand-water separation device. In the invention, the accurate establishment of the storage amount of the abrasive particles in the whole system is realized through weighing the weight, so the storage amount of a motor required by the circulation in the whole system is accurately controlled, thereby the control of the jetting stability of the jetting system is finally realized.

The invention provides an intelligent and secure community management and control system based on a cloud platform, and belongs to the field of electronic technology. The problems of single function,low integration level and incapability of completely managing and controlling community security and protection in the prior art are solved. The management and control system comprises an informationsensing platform, a network platform, a data processing platform and a public security application platform, the information sensing platform comprises a video collecting device, an alarm sensor, an AP collecting device and an RFID device; the network platform comprises a video private network, a public security information network, a 3G/ 4G/5G wireless network and the Internet; the data processing platform comprises a video image information data processing module, a public security service information data processing module, an information integrated processing module and a GPS spatial information processing module; and the public security application platform comprises a video investigation application unit, a vehicle application unit, a face application unit, an AP application unit, anRFID application unit, and a data comprehensive analysis application unit. Through multi-functional integration, the management and control system can realize the comprehensive management and controlof the community security and protection management, and has good practicability.

The invention discloses a precision control method and a precision control device for adding micro-liquid. The precision control device comprises an ARM9 processor, a color LCD display touch screen, an Ethernet interface circuit, a high-precision speed regulation circuit, a speed monitoring circuit, a flow detection circuit, a liquid level monitoring circuit, an alarm circuit, an SD card interface circuit, a USB interface circuit, a PWMDAC circuit, an SDRAM memory circuit, a program memory circuit flash, and a motor control interface circuit, wherein the circuits are mutually connected and the precision control for adding the micro-liquid addition is realized by software programming. By using the rate tracking technology to timely change the needed liquid flow, the precision control method and the precision control device for adding the micro-liquid realize the accurate control of micro-liquid addition in the production process, achieve the control precision of 1 percent, and have the functions of local automatic alarm and remote automatic alarm under the abnormal condition. The precision control method and the precision control device have convenient control parameter input, and can be organically integrated with the conventional production equipment to greatly improve the production efficiency and save the production cost.

The invention provides an electrohydraulic control steering system, which comprises a liquid path control device, wherein the liquid path control device comprises a hydraulic pump for providing hydraulic oil; a rear axle steering oil cylinder for controlling the rear wheel of the vehicle to steer and a front axle steering oil cylinder for controlling the front wheel of the vehicle to steer; an electric proportion reversing valve, wherein the electric proportion reversing valve is used for controlling hydraulic oil to flow to the rear axle steering oil cylinder or the front axle steering oil cylinder; a switching valve; and an angle measuring device, wherein the angle measuring device comprises an angle sensor for measuring a steering angle of a wheel and the angle sensor is fixedly connected to a rear axle and/or a front axle of the vehicle. The angle measuring device measures an actual steering angle of the wheel through the angle sensor, and the electric proportional reversing valvecontrols the flow direction of hydraulic oil according to the relationship between the actual steering angle of the wheel and a target steering angle so as to control the movement of the rear axle steering oil cylinder and the front axle steering oil cylinder, thereby the automatic control of wheel steering is realized.

The invention provides a cooking utensil fire power control method and device and a cooking utensil. The cooking utensil fire power control method comprises the steps of determining a current cookingscene, and determining temperature control mode information corresponding to the cooking scene; acquiring the measuring temperature of pots in real time; determining a fire power control signal basedon the measuring temperature and the temperature control mode information; and controlling the fire power of the cooking utensil based on the fire power control signal. According to the cooking utensil fire power control method, a user selects a corresponding cooking scene and utilizes the temperature control mode information corresponding to the cooking scene and acquires the measuring temperature in real time to realize automatic and accurate control of the fire power of the cooking utensil, rather than controlling the fire power by personal experience.

The invention discloses a lithium ion battery pack tab liquid cooling based on liquid cooling. The liquid cooling device comprises a closed liquid cooling pipeline, and heat conductive cooling liquid arranged in the liquid cooling pipeline. The liquid cooling pipeline comprises metal pipelines and insulation pipelines which are arranged alternately. The metal pipelines fit the tab collector sheets of the lithium ion battery pack and are used for conducting the heat of lithium ion battery pack tabs. The insulation pipelines are connected with the metal pipelines. The liquid cooling pipeline also comprises a liquid inlet and a liquid outlet which are closeable and openable and are used for importing and exporting the heat conductive cooling liquid. The heat conductive cooling liquid is insulation liquid with a heat conductive cooling function. According to the device, the tabs at different locations of the lithium ion battery pack are connected through a heat conductive loop, and the heat conductive cooling liquid is injected into the loop. The temperature difference problem of the battery tabs at different locations in the charge/discharge process of the battery pack is solved. The device has good soaking effect, is simple in structure, is easy to disassemble and expand, and is applicable to lithium ion batteries of different combinations.

The invention relates to the structure of a silicon wafer lapping machine or a polishing machine, in particular to the structure of a lower polishing disk of a silicon wafer lapping machine or a polishing machine. The lower polishing disk of a polishing machine comprises a lower disk working disk (7), and is mainly characterized by also comprising a lower disk base disk (9) on the lower part of the lower disk working disk (7), wherein a cooling cavity (3) is formed between the lower disk base disk (9) and the lower disk working disk (7); the lower disk base disk (9) is provided with a water inlet (8) and a water outlet (5); and the water inlet (8) and the water outlet (5) are respectively communicated with the cooling cavity (3). The invention has the advantages that the special structure of a water cooling disk can prevent cooling water taking a shortcut; because cooling water can flow out from the water outlet (5) only after the cooling cavity (3) is filled, a polishing disk can be fully cooled by cooling water; and because heat generated by operating is carried out in time, the polishing disk can be forcibly cooled. Compared with a traditional passive cooling method, the invention is more reliable. The lower polishing disk is combined with a precise temperature measuring system and a cooling water flow regulating system to realize the precise control of polishing temperature.

The invention relates to a cleaning method for a brazing filler metal extruded wire. The cleaning method comprises the following steps of: 1) soaking a coiled extruded wire in an acidic solution in which the mass percent concentration of an acid ranges from 15% to 20% for 15-30 minutes, thus removing scale cinders; 2) performing vibrating flushing for 10-30 seconds to remove residues from the surface of the extruded wire; 3) flushing for 5-10 seconds to further remove residues from the surface of the brazing filler metal; 4) soaking the extruded wire in a passivation solution containing 0.3-0.8% of benzotriazole at 50-70 DEG C for 1-5 seconds. The invention also relates to a cleaning device for implementing the cleaning method. The cleaning device comprises a frame platform, tanks and a conveying device; and the cleaning device is characterized in that the tanks include a deoxidation tank, a vibrating flushing tank, a flushing tank and a passivation tank which are orderly arranged, the tanks are located under the frame platform, the conveying device is mounted on the frame platform, and the conveying device is matched with the tanks.

The invention relates to the technical field of logistics transportation, in particular to a rapid packing machine for fragile products in the logistics transportation process. The rapid packing machine comprises a support and a working table. A storing box is installed at the position, located below the working table, of the inner side of the support. A pressurizing pump is arranged on one side face, close to the storing box, of the inner side of the support. Two sliding grooves are formed in the two side edges of the upper surface of the working table correspondingly. A box sealing mechanismA is installed on one side face of the working table. According to the rapid packing machine, a spraying gun and swelling of foaming agents are utilized for filling gaps between the fragile productsand the box, a pressing plate is utilized for achieving precise control over the foaming agents, the situation that the foaming agents swell and overflow of the box is avoided, meanwhile, the box sealing mechanism and a rotating disc are used in cooperation, adhesive tape is utilized for packaging the surface of the box conveniently, the traditional manner of holding the adhesive tape manually forpackaging is replaced, the package efficiency is high, moreover, time and labor are saved, operation is convenient, the packing quality of the fragile products is improved, and the damage probabilityof the fragile products is reduced.

The invention provides a clean and efficient production line for sauce. The clean and efficient production line is mainly used for solving the technical problems that in the prior art, in a productionworkshop, oil fume pollution is caused, operators are uncontrollable, and the production control automation degree and the intelligentization degree are low. According to the clean and efficient production line, equipment for the stir-frying procedure and the packaging procedure is redesigned and replanned, inner packaging and outer packaging of the packaging procedure can be integrated onto a same set of equipment; and the packaging procedure is completed fully automatically. The equipment on the whole production line is controlled and operated through an industrial personal computer. The industrial personal computer is mounted in a computer room. The operators can stay in the computer room to control and operate the equipment in the production workshop. Uncleanness and insanitation accidents caused by the operators in the production environment are reduced.

The invention discloses a stone coal vanadium ore oxidation grain breaking roasting comprehensive utilization method. The method is carried out according to the following steps (1) a stone coal vanadium ore is crushed and ground to obtain powder ore; (2) the power is delivered to a suspended decarburization roasting furnace for decarburization reaction; (3) a decarburized material is subjected tocyclone separation and then enters a suspended grain breaking roasting furnace to be subjected to a grain breaking oxidation reaction; (4) an oxidized material is discharged after cyclone separation;(5) cooling is conducted to 150-200 DEG C is conducted, acid mixing curing leaching, or directly leaching is conducted; (6) a leached material is filtered to obtain a V2O5 leaching solution; (7) filter residue is mixed with a sodium hydroxide solution for secondary leaching, and filtering is conducted to obtain a secondary filtrate; (8) hydrochloric acid is added into the secondary filtrate to generate white precipitate, and filtering is conducted to obtain third filter residue, and drying is conducted to obtain white carbon black. According to the method, sodium salt adding is not required byroasting, the problems of incomplete vanadium oxidation, low equipment processing amount, high operation cost and the like in a traditional process are solved, the process flow is simple, equipment and system operation are stable, and energy consumption and cost for unit processing amount are low.

The invention discloses a service process management and control system and management and control method based on air freight. The management and control system comprises a task node configuration module, an interface module, a task decomposition module, a task distribution module, a job execution module and a task monitoring and scheduling module. The task node configuration module is used for configuring and storing task nodes; the interface module is used for acquiring flight plan information of a flight system; the task decomposition module automatically decomposes a list task of each service link; the task distribution module distributes a production task to each execution post, and each post operator completes operation execution through the job execution module; the task monitoringand scheduling module monitors the execution process and dynamically organizes and schedules resources according to an execution situation. According to the invention, accurate management and controlof a freight station operation process are realized so that the freight station operation process is flexible and configurable, the operation task is quantifiable, the execution process can be monitored, and the freight station operation efficiency is improved.