30results about How to "Guaranteed control reliability" patented technology

The invention discloses a communication control method and apparatus for an unmanned aerial vehicle. The method comprises the steps of: detecting whether network parameters corresponding to a current network meet preset conditions; when the network parameters meet the preset conditions, generating a network switching request of a communication network; sending the network switching request to a control terminal; and if receiving a switching confirmation instruction returned by the control terminal in a preset time period, according to the switching confirmation instruction, switching the current network into a target network. Namely, when the unmanned aerial vehicle detects that the current network is interfered, the unmanned aerial vehicle generates the communication network switching request and fulfills the communication network switching aim by communication with the control terminal, so that the problem that the unmanned aerial vehicle is out of control due to interference to the communication network can be avoided, thereby improving control stability and safety of the unmanned aerial vehicle.

The invention relates to the household electrical appliance field, and discloses a user client, a household electrical appliance, and a control method thereof. The control method comprises steps that a type of a network used for controlling a device is determined; following items are carried out by aiming at different network types based on corresponding communication protocols: a request of subscribing to the state of the device is transmitted; the state information of the device responding to the subscription request is received; an instruction of controlling the device is transmitted based on the state information. A wide area network or a local area network is used to control the device according to a use condition, and the reliability of the control is guaranteed, and the efficiency of the control is improved.

The invention discloses an intelligent tension stringing monitoring device for an overhead electric transmission line, which comprises a data wireless receiving and processing unit, a pulley wireless angular transducer, a traction measuring device and a tension measuring device. The pulley wireless angular transducer is used for measuring the angle of a conducting wire and a horizontal plane at apulley on a rod tower; the traction measuring device is used for measuring the traction of a tractive rope of the electric transmission line; the tension measuring device is used for measuring the tension of an outlet conducting wire of a tensioning machine; and the pulley wireless angular transducer, the traction measuring device and the tension measuring device are all connected with the data wireless receiving and processing unit wirelessly through a wireless receiving-transmitting device. The data wireless receiving and processing unit can receive the information of the wireless angular transducer, the tension information of the tension measuring device and the traction information of the traction measuring device, and further draws a sag curve of the conducting wire according to the information and the parameters of a know ground and a spanning object, so as to monitor the sags of all shelves or all important shelves in real time.

The invention provides a photoelectric feedback type carpentry milling head device with double swing angles. The photoelectric feedback type carpentry milling head device with the double swing angles comprises a supporting seat, a main shell, an electric spindle connecting plate, an electric spindle, a shaft C driving mechanism, a shaft A driving mechanism and two rotary photoelectric encoders, wherein the supporting seat is provided with the shaft C driving mechanism which comprises a servo motor and a transmission mechanism, and an output shaft of the shaft C driving mechanism is connected with the main shell; the main shell is provided with the shaft A driving mechanism which comprises a servo motor and a transmission mechanism, and an output shaft of the shaft A driving mechanism is connected with the electric spindle through the electric spindle connecting plate; the shaft C and shaft A driving mechanisms are provided with a travel switch respectively, a positioning block is arranged on a limit belt wheel which is connected to the output shafts of the driving mechanisms, and a corresponding limit switch is arranged on the supporting seat or the main shell; and grating discs in the rotary photoelectric encoders are arranged on the output shafts, and a photoelectric detector and a light source are arranged on the supporting seat or the main shell. The photoelectric feedback type carpentry milling head device with the double swing angles can realize polyhedron carving and milling processing during the processing of wood and artificial boards, and is suitable for carpentry high-accuracy and high-speed multi-axle numerically-controlled machine tool.

The invention belongs to the technical field of steel rolling equipment, and discloses an online automatic roller scurrying method of a working roller of a planisher. The online automatic roller scurrying method comprises the following steps of lifting an upper supporting roller to an upper limit position; additionally arranging the upper supporting roller and an upper working roller in a balanced manner; moving the upper working rollers to a lifting position; driving a lower working roller and a lower supporting roller to rotate at a permanent speed; executing the scurrying operation of the upper working roller and the lower working roller; controlling the lower working roller and the lower supporting roller to stop rotating; and moving the upper working roller and the lower working roller to production preparation positions. Through the adoption of the roller scurrying method provided by the invention, the roller scurrying efficiency is improved, and influence on the stability and the accuracy of the planisher is reduced.

The invention relates to an embedded proportional controller, which comprises a housing and a circuit board arranged therein. A circuit structure on the circuit board comprises an embedded microprocessor, a peripheral circuit connected with the embedded microprocessor, and a power supply module which supplies power for the embedded microprocessor and the peripheral circuit, wherein, the embedded microprocessor comprises an A/D converting unit, a memory and PWM output control unit, a digital quantity input and output unit, a logic control unit and an interface control unit, the peripheral circuit comprises an input signal conditioning circuit, a power amplification circuit, a display unit, a feedback indication circuit, an RS232 interface circuit, a keyboard entry circuit and a power supply module. An voltage input terminal and a current input terminal are connected with the A/D converting unit via the input signal conditioning circuit, the power amplification circuit is connected with the PWM output control unit, and the display circuit is connected with the digital quantity input and output unit. The embedded proportional controller is convenient in signal processing and strong in anti-interference capability, and can communicate with an upper computer. By the invention, only software parameters need to be changed corresponding to different proportioning valves, allowing no change to hardware circuit.

The invention discloses an insulated conveying system. The insulated conveying system comprises a conveying component, an upper heating device and a lower heating device, wherein an insulated space is formed between the upper heating device and the lower heating device; and the conveying component penetrates through the insulated space. The insulated conveying system disclosed by the invention has the beneficial effects that by adoption of the technical scheme, active heating is carried out from top to bottom simultaneously, so that materials on the conveying component can be kept at a certain temperature; and due to simultaneous heating from top to bottom, the heating effect is better; and the production quality of products is guaranteed.

The invention discloses a farmland irrigation system, which comprises electromagnetic valves, capillary pipes and main pipeline equipment, wherein the electromagnetic valves are respectively connected with the capillary pipes and the main pipeline, in one piece of farmland, one end opening of each capillary pipe of the four capillary pipes is respectively provided with one electromagnetic valve, one end of the main pipeline is connected with one electromagnetic valve, and the other end of the main pipeline is respectively connected with the electromagnetic valves of the four capillary pipes. The farmland irrigation system has the characteristics that the energy consumption is low, and the control is easy. The farmland irrigation system is suitable for being popularized and applied.

The invention relates to a gear shifting device for multi-speed transmission of electric vehicles. The gear shifting device for a multi-speed transmission for an electric vehicle includes a shifting unit controlling gear shifting by a torque of an actuator, and a parking unit controlling a parking state by the torque of the actuator. In particular, the actuator includes a control motor transmitting a driving torque to a first driven gear and a second driven gear through a drive gear externally gear-meshed with the driven gears, and the shifting unit includes: a shift fork slidably mounted on afork rail and activating the gear shifting; a profile drum connected to the first driven gear externally engaged with the drive gear, and having a profile groove formed along an exterior circumference of the profile drum; and a shift lug integrally formed with the shift fork and coupled with the profile groove.

The invention relates to a bidirectional isolation type energy conversion system. The system comprises a three-phase PWM rectification circuit and a cascaded bidirectional active bridge DC/DC conversion circuit. The bidirectional active bridge DC/DC conversion circuit comprises a high-voltage side H bridge, an HSLP high-frequency transformer circuit and a low-voltage side H bridge. One side of thehigh-voltage side H bridge is connected with the three-phase PWM rectifying circuit, and the other side of the high-voltage side H bridge is connected with the high-voltage side of the HSLP high-frequency transformer circuit; and the low-voltage side of the HSLP high-frequency transformer circuit is connected with the low-voltage side H bridge. The system can achieve AC-DC bidirectional conversion, is simple in design, and achieves the lightweight design of equipment. Meanwhile, the invention further provides a corresponding control method. A SVPWM and PWM hybrid control mode is adopted, a three-phase PWM rectification circuit adopts SVPWM control, and a bidirectional active bridge DC/DC conversion circuit adopts PWM control, so that the control stability of the system is improved, and the control reliability of the system can be kept in a voltage full-range conversion mode in the hybrid control mode.

The invention discloses an intelligent hay mower. The intelligent hay mower comprises a machine shell; the moving assembly is used for driving the intelligent mower to move; the cutting device comprises a cutterhead assembly provided with a cutterhead, a blade assembly movably connected to the cutterhead assembly, a connecting assembly used for connecting the blade assembly and the cutterhead assembly, and a cutting motor used for driving the cutterhead assembly to rotate; the blade assembly comprises a blade provided with a cutting edge part, when the cutting motor does not drive the cutter head to rotate, the blade is in a first state, and when the blade is in the first state, at least part of the projection of the cutting edge part in the horizontal direction is overlapped with the projection of the cutter head in the horizontal direction; the connecting assembly comprises a return part, the return part has an initial state and a deformation state, when the return part is in the deformation state, the return part can generate return force enabling the return part to return to the initial state, one end of the return part is connected with the cutterhead assembly, and the other end of the return part is connected with the blade assembly. The intelligent mower provided by the invention has relatively high safety.

The invention provides an intelligent control method and device for the sensitivity of an automatic ball valve sensing system. The method comprises the steps: obtaining first pipeline distribution diagram information of a first factory; obtaining first ball valve information and second ball valve information according to the first pipeline distribution diagram information; obtaining first fluid information of the first factory; obtaining first physical attribute information of first fluid; obtaining first fluid pressure information, first fluid speed information, second fluid pressure information and second fluid speed information; obtaining a first corrosion degree of a first ball valve; obtaining a first preset corrosion degree; when the first corrosion degree is within a first preset corrosion degree range, obtaining a second corrosion degree of a second ball valve; judging whether the second corrosion degree meets a first preset condition or not; and if not, obtaining first flow adjusting information, and adjusting the first fluid flux of the first ball valve and the second fluid flux of the second ball valve through an intelligent control terminal, so that the technical effect of improving the sensitivity of the ball valve sensing system is achieved.

The invention relates to a water spraying control system of an automobile water spraying windscreen wiper. The water spraying control system comprises a windscreen wiper motor, a washing pump, a first contact, a second contact, a third contact, a vehicle body controller and a relay, wherein an insulating disc is fixed to a motor shaft of the windscreen wiper motor in the circumferential direction, a current-conducting plate is arranged on the insulating disc and is in a circular arc shape concentric with the insulating disc, the central angle of the current-conducting plate is smaller than or equal to 180 degrees, the front end of the conductive plate is in contact with the first contact, the second contact and the third contact, one end of the washing pump is electrically connected with a movable contact of the relay, the other end of the washing pump is electrically connected with a negative electrode of a vehicle body power supply, a first static contact of the relay is connected with a common ground, a second static contact and a power supply end of the relay are electrically connected with a positive electrode of the vehicle body power supply, a signal control end of the relay is electrically connected with a control signal output end of the vehicle body controller, the first contact is electrically connected with a reset signal end of the vehicle body controller, the second contact is electrically connected with a negative electrode of the vehicle body power supply, and the third contact is electrically connected with a control signal input end of the automobile body controller.

The invention provides a hydraulic control system and a road sweeper. The hydraulic control system comprises a first oil cylinder structure and a second oil cylinder structure, wherein the first oil cylinder structure is in driving connection with a sweeping mechanism; the second oil cylinder structure is connected in series with the first oil cylinder structure and is in driving connection with the sweeping mechanism; wherein the sweeping mechanism has a storage position and a working position. When hydraulic oil flows from the first oil cylinder structure to the second oil cylinder structure, the first oil cylinder structure and the second oil cylinder structure drive the sweeping mechanism to be switched from the storage position to the working position; and when hydraulic oil flows from the second oil cylinder structure to the first oil cylinder structure, the first oil cylinder structure and the second oil cylinder structure drive the sweeping mechanism to be switched to the storage position from the working position. The invention solves the problems that in the prior art, the electric control mode of a control system of a road sweeper is complex, the number of electric control elements is large, and consequently the number of places with faults is large.

A brushless direct current motor control method based on RISC-V. An RISC-V core chip is connected to a motor controller of a brushless direct current motor, and the RISC-V core chip is in butt joint with a motor control system corresponding to the motor controller. The RISC-V core chip is used to acquire working data of the brushless direct current motor, and the working data is uploaded to different motor operation function programs; analyzing and processing the working data through a motor operation function program to obtain a corresponding motor working state analysis result; and finally, according to a motor working state analysis result, a corresponding control instruction is sent to the brushless direct current motor, and the working state of the brushless direct current motor is adjusted. According to the control method, the RISC-V core chip is connected into the motor controller of the brushless direct current motor, and the RISC-V core chip can be used for transplanting an operating system, so that different functional programs of the brushless direct current motor can be conveniently operated, and the compatibility of the brushless direct current motor to the different functional programs is improved.