381results about How to "Avoid getting out of control" patented technology

The invention provides an auto-management data link of micro unmanned aerial vehicles, which comprises a physical medium which is 2.4 to 2.483GHz microwaves, a link protocol which is ZigBee protocol is an international standard IEEE802.15.4-based wireless network protocol, and equipment formed by connecting a micro unmanned aerial vehicle model with a wireless module and an antenna, which are fixedly arranged in the unmanned aerial vehicle model, through a serial port RS-232. The wireless module consists of a ZigBee coordinator and a ZigBee router and adopts a half duplex communication mode; a data link network topology is a tree topology; and data link simulation software is the 14.5 edition of OPNET network simulation software. The data link allows the transmission speed of the unmanned aerial vehicles to reach 250kbps; the channel utilization rate can reach 90 percent; the packet transfer delay is 0.4s; and the throughput of the data link is 63kbps.

The invention relates to a device for rapidly collecting and releasing boats, which comprises a collecting and releasing arm structure, an aligning device, a decoupler, a sling and a winch, wherein one end of the collecting and releasing arm structure is connected with a mother ship and the other end of the collecting and releasing arm structure can be extended or retracted in a suspending way to provide a force applying fulcrum for collecting and releasing the boats; the aligning device is connected at the other end of the collecting and releasing arm structure and is used to align with the lifting and the lowering positions of the boats on sea surface; the decoupler is limited on the aligning device and is used to be connected with the boats; one end of the sling penetrates through a pulley fixed on the collecting and releasing arm structure in a winding way, is connected with the decoupler and is used to transmit pulling force to the decoupler; and the winch is connected with the other end of the sling to provide pulling force for collecting and releasing the boats. The device is a collecting and releasing device with complete functions and can be used to stably and rapidly lower down the boats to sea surface from the mother ship under force-seven wind sea conditions or to collect the boats back to the mother ship from sea surface.

The invention discloses a method and a system for monitoring grouting process on site. The method comprises the steps as follows: firstly, a site monitoring center is arranged among a plurality of grouting recorders, a central server is arranged in a digital dam behind, and the three transmit grouting data in a wired or wireless coded way; secondly, a system device is started by codes and a softdog; thirdly, in the measuring, recording and transmitting of the recorders, the monitoring center controls the recorders remotely by a network so as to discover suspicious data, interrupt logging, andrequire to upload data and process on site, and when a value exceeds a set value, an alarm is used for shutting down automatically and recording data, thereby preventing project quantities from beingout of control; fourthly, programs for checking the on-line state of the recorder and the like are arranged in a host machine of the monitoring center, thereby avoiding cheating; fifthly, the monitoring center can fix the position of the recorder, thereby being beneficial to managing equipment on site; and sixthly, after ensuring that the data is reliable, the data can be uploaded on a server to be stored. By the method and the system, the problem of dispersive monitoring due to few supervisors can be solved, and the data safety and project quality are ensured; the 3G (the third generation telecommunication) transportation has a low cost and is reliable; by adopting the wireless network, rewiring is avoided when a construction surface is changed; and a manager can realize the remote control without being on site.

The invention provides a nonwoven fabric ceramic separator, and a preparation method and application thereof. The preparation method specifically comprises the following steps: preparing a nonwoven fabric fiber base membrane through an electrostatic spinning method; and performing atomic layer deposition on the surface through a plasma enhanced atomic layer deposition technology, so that inorganic matters are uniformly coated on the surface of the polymer fiber to form a core-shell structure taking the one-dimensional polymer fiber as the core and the inorganic matters as the shell. The nonwoven fabric ceramic separator is used in a secondary battery. The separator can be further endowed with a thermal shutdown function through a polymer layer compounding method. The nonwoven fabric ceramic separator obtained by the invention has high thermal shrinkage resistance, enhanced mechanical strength, small membrane ceramic layer thickness and favorable uniformity; and an assembled battery has high mass and volume specific energy and high safety. Thus, the separator provided by the invention can be used as a high safety separator material for lithium ion batteries and other secondary batteries.

The invention relates to an underground environment monitoring system and method based on a mooring unmanned aerial vehicle, and belongs to the field of underground environment monitoring. The underground environment monitoring system comprises a hand-held terminal and a PC in wireless connection with a flat intelligent remote controller, the PC and a power converter are connected with a wound rotor through cables, the wound rotor is inside provided with a driving motor and a tension sensor, and the wound rotor is connected with a mooring unmanned aerial vehicle flight monitoring platform through a cable. The underground environment monitoring method comprises starting an automatic pay-off and take-up device; starting an acquisition system of the mooring unmanned aerial vehicle flight monitoring platform; acquiring environmental parameters, image information and motion parameters, and returning the above to a ground monitor station; carrying out data processing and analysis; judging whether the parameters exceed the standard, giving a danger alarm until people evacuate, and making a return flight; and flying to sky over the parking apron and safely landing. According to the invention, the technical problem that a conventional underground environment monitoring system is low in automation degree, hard to repair, low in safety, and poor in system stability, information transmission is limited, and the working time is restricted by electric energy is solved.

The invention describes a methods and a device of software anti-jamming, the establishment of a number of posts is in the process, returning to preserve data before each subroutine is called; upon return, should verify the function word returned, right before the following procedure to continue. And at the entrance of the process signs are set up to judgment on-reset or system reset, which is used to determine the system initialization or resume; For preservation of the system to set the entrance according to recover the data. Monitoring software operation and achieving fault recovery, so as to avoid out of control of the system caused by outside interference, and the system can resume in a short time, continue to run the system state before out of control, system will be restored to running the state before flying procedures.

The invention relates to an audio / video smooth broadcasting method adaptive to the public wireless network. The audio / video smooth broadcasting method includes: setting parameters; forming audio / video transmission streams; abandoning partial information; transmitting the streams through the network; adding partial information; outputting the streams; working out a transmission strategy. The audio / video smooth broadcasting method adjusts the transmission strategy in real time by monitoring the effective bandwidth of the current network timely, and ensures audio / video at the receiving terminal to be broadcasted smoothly. If the encoding rate has been adjusted in the extreme state, namely the lowest encoding rate of an encoder, about one third of the network bandwidth can be saved by abandoning a bidirectional reference frame, and integrity of each audio frame and audio continuity can be ensured. Control on the delay length in the whole transmission process can be ensured by setting delay parameters, and further out of control of audio / video transmission delay caused by network state deterioration can be avoided. Meanwhile, Port Address Translation (PAT) information and PMT information in the audio / video transmission streams at the transmitting terminal are properly abandoned, placeholder data are removed, and the bandwidth is saved.

The invention relates to the technical field of power electronics, in particular to a maximum inductor current sharing control method of a DC / DC converter. The inductor current command signal output by the voltage controller of each module is sent to the analog current sharing bus through the digital-to-analog converter DAC and the maximum arbitration circuit on the control board, so that the maximum value imax of the inductor current command of each module is obtained on the current sharing bus. Then each module resamples the imax signal on the current sharing bus, and processes the sampled signal as the inductor current command signal of the inductor current inner loop of the module. Compared with the current-sharing control loop based on output current, which uses the reference value ofoutput regulated voltage of current-sharing controller to realize output current equalization between modules, the method simplifies the design of the control system, significantly improves the dynamic performance of the current sharing control, ensures the dynamic control performance of the current sharing, and improves the balance of the output current of each module in the dynamic process.

The invention discloses a dual-computer redundancy control system and a redundancy control / fault monitoring method and apparatus thereof. The system comprises a first PLC device, a second PLC device,a first IO module and a second IO module. The first PLC device comprises a first power supply module, a first CPU, a first bus communication module and a first redundant communication module. The second PLC device comprises a second power supply module, a second CPU, a second bus communication module and a second redundant communication module. The first redundant communication module and the second redundant communication module are connected through a cable and used for synchronous communication of user configuration logic operation results. The first bus communication module is connected with the two IO modules and the second bus communication module through a first bus. The second bus communication module is connected with the two IO modules and the first bus communication module through a second bus. Because the PLC devices in a main-standby relation can be mutually replaced in a redundant mode at any time when one PLC device breaks down, the problem that a controlled system is out of control is avoided.

The invention discloses a fire-extinguishing scheduling method and system for fire-fighting robots of an electric tunnel. The scheduling method comprises the following steps: obtaining tunnel ambientcondition data, and adopting a transverse data fitting and longitudinal data fitting method to pre-judge a suspected fire source position and strength according to the tunnel ambient condition data; scheduling a video robot to be close to the suspected fire source position within a safety distance to judge a development stage of a fire behaviour; scheduling the surrounding fire-fighting robots ina unified mode according to the determined development stage of the fire behaviour and strength of the fire behaviour, and scheduling the fire-fighting robots to a fire behaviour site to perform fire-fighting fire-extinguishing treatment; and scheduling the fire-fighting robots which complete spray to withdraw from a fire source site, obtaining fire behaviour continuous monitoring data of the video robot in real time, and performing secondary fire-extinguishing treatment once after-combustion occurs. The fire-extinguishing scheduling method and system can realize automatic fire behaviour monitoring and fire extinguishing, guarantee safe operation of power equipment without staff on duty and human intervention, greatly reduce labor cost, and improve working safety of personnel.

The invention discloses a control method of a remote control system and a primary device. The method comprises the following steps: the primary device of the remote control system receives a first data packet sent by a slave device of the remote control system according to the first data rate, wherein the first data rate is determined through advance connection establishment of the primary device and the slave device; the primary device acquires position information of the slave device from the first data packet, and determines the straight line distance between the primary device and the slave device according to the position information of the slave device and the self position information; the primary device judges whether the straight line distance is within the straight line distance value taking interval corresponding to the preset first data rate; if the primary device judgment result is not, the slave device is notified to be adjusted as the second data rate so as to enable the primary device to communicate with the slave device according to the second data rate, thereby solving the disadvantage that the handling action is large in response delay and can be out of control since the unmanned aerial vehicle wireless remote control communication method adopts the fixed data rate to communicate at present.

The application provides an automatic driving control method, device and equipment, and a storage medium. The method comprises the following steps of acquiring running state information of a target vehicle at a current time, wherein the running state information includes a current first position, a running speed and a running direction of the target vehicle; determining a second position after the target vehicle runs a preset duration based on the first position, the running speed and the running direction, and determining a lane width value at the second position, and a first distance from the second position to the lane centerline; performing a summation process based on the first distance and the lane width value to obtain a distance constraint parameter between the target vehicle and the lane centerline after running the preset duration; and adjusting the parameter of a trajectory tracking function running in the target vehicle based on the distance constraint parameter, so that the target vehicle runs according to the amount of steering wheel control output by the trajectory tracking function, thereby avoiding that the target vehicle is out of control and improving the stability of controlling the target vehicle.

This invention discloses one method to realize communication device single board, which comprises the following steps: after initiating single board and setting it for prepare status and operating board information through main parts; when there is response, the board part reads board information to fulfill bus read or write operations and signal series and conversion and control module interface; according to the coded board information and main parts, aid parts status information and information interacting. The invention also discloses one communication device single board inverse device.

The invention provide a three-limit time-base circuit composed of analogue integrated circuit operational amplifier A (or voltage comparator B), few separate electronic elements by using new principleand ingenious connection mode. The three-limit time-base circuit has top and bottom limit main control functions completely compatible to all functions of classic 555 time-base circuit can be used asultra-top and bottom limit control circuit and astable, monostable and bistable circuit. The invention increases exceed bottom limit protection and control function, when inputted sensing circuit hasfault, fault display and protection control can be executed in time to prevent the main control circuit from being out of control. The invention, used in control circuits for temperature, pressure, water level etc., may improve security, and prevent severe accidents (such as fire hazard). So, the invention has wide use in electronic application field such as household electrical appliances, simple controllers, and high cost performance of products are provided.

The invention relates to a hybrid power composite unmanned helicopter. The hybrid power composite unmanned helicopter comprises a helicopter body and further comprises an undercarriage component fixedat the lower part of the helicopter body, stub wing components symmetrically distributed on the two sides of the helicopter body, a main propeller component at the middle part of the helicopter body,and a tail rotor component at the rear part of the helicopter body, the undercarriage component comprises an undercarriage body and a dismountable ground wheel connected with the lower part of the undercarriage body through a bolt, the stub wing component comprises a stub wing body, a pushing propeller at the middle part of the stub wing body, and a pushing motor distributed in the stub wing body, the main propeller component comprises a main propeller main body rotatably connected with the upper part of the helicopter body, an engine distributed at the front part of the inner part of the helicopter body and an auxiliary generator arranged at the front part of the engine, the tail rotor component comprises a tail rotor main body arranged at the tail end of the helicopter body and a tail rotor motor arranged at the inner part of the tail end of the helicopter body, the invention provides the hybrid power composite unmanned helicopter, and a stub wing can be rapidly dismounted.

The invention discloses a vehicle control method and system, and equipment. The method comprises the following steps that physiological status information of a driver and / or vehicle state informationare / is acquired when an adaptive cruise system is in a turned-on state; the fatigue grade of the driver is determined according to the physiological status information of the driver and / or the vehicle state information; when the fatigue grade reaches a first fatigue grade, the driver is reminded to take over the control of the vehicle; and when the fatigue grade reaches a second fatigue grade, the vehicle is controlled to reduce speed to run along the current running lane until the vehicle speed is zero. According to the vehicle control method, aiming at different fatigue grades, a vehicle control strategy conforming to the actual driving working condition is adopted, so that continuity, comfort and safety in the driving process are guaranteed.

The invention discloses an alternating current permanent magnet synchronous machine control system for an electric vehicle. The system comprises an alternating current permanent magnet synchronous machine, a power convertor, a controller and detectors; the controller is a digital signal processor (DPS); the detectors comprise a position detector and a current detector; the position detector and the current detector input rotor positions / speed signals and current signals, which are detected by the position detector and the current detector respectively, of the alternating current permanent magnet synchronous machine to the DSP; the DSP calculates the given value of the current according to the input rotor positions / the speed signals and compares the given value and the input current detection value to obtain a corresponding control signal, and the alternating current permanent magnet synchronous machine is driven by the power convertor; and the power convertor has a three-phase double-inversion bridge structure consisting of a metal-oxide-semiconductor field effect transistor (MOSFET) inverter and an insulated gate bipolar transistor (IGBT) inverter. The system has the advantages of compact and firm structure, reliable performance, high control efficiency and accuracy and the like and runs stably and a circuit is simple.

The invention discloses a road and bridge safety anti-collision guardrail based on an inertial principle. The road and bridge safety anti-collision guardrail comprises a bottom plate; the top of the bottom plate is provided with sliding grooves and a damping device, the sliding grooves are located on both sides of the damping device, and the tops of the sliding grooves are slidably connected withanti-collision side plates; the two anti-collision side plates are fixedly connected through a fist spring, and a buffering device is arranged in the up-down direction of the damping device and can make the anti-collision side plates to be delayed reset; no less than four connecting rods are movably mounted to the left side and the right side of the damping device correspondingly, and the two connecting rods on the same side are movably connected through a rotating shaft in a cross mode; and first connecting pieces are fixedly mounted at the other ends of the connecting rods correspondingly, and the first connecting pieces are connected with the anti-collision side plates through grooves. The road and bridge safety anti-collision guardrail based on the inertial principle has the characteristics of anti-collision damping, protection of automobiles, the long service life and the like.

The embodiment of the invention provides a virtual object control method and device in a game scene. The method comprises the steps that whether a specific event exits is detected, wherein the specific event comprises an event enabling a touch terminal to interrupt response to a game operation instruction; if the specific event is detected, game parameters for a first virtual object and second virtual objects are acquired; the second virtual objects are virtual objects not configured to execute a virtual action according to the game operation instruction received by the touch terminal in the game scene; according to the game parameters, a target virtual object is determined from the second virtual objects; and the first virtual object is controlled to automatically follow the target virtual object. Through the embodiment, the first virtual object can be controlled to follow the target virtual object of other players, and therefore when a player cannot control the first virtual object,the situation that the first virtual object is out of control still can be avoided.

The invention provides an automatic compensation method for supply air temperature of a variable-air-volume air conditioner. The automatic compensation method comprises the following steps: acquiringthe data of a terminal device by utilizing an air conditioning terminal controller; building am LS-SVR temperature imbalance prediction model, wherein the air conditioning terminal controller adopts cascade PID control; calculating a required air volume value and an air valve opening degree value according to a temperature set value and a measured temperature value; meanwhile, predicting whether aroom temperature is imbalanced according to the air conditioning terminal controller and sending a prediction result to an air conditioning set controller; and automatically setting and adjusting a set temperature of an electric water valve of a coiled tube of an air conditioning set by using the air conditioning unit controller so as to control the opening degree of the electric water valve by using a PID algorithm and compensate the supply air temperature ahead of time. The automatic compensation method provided by the invention has the beneficial effects of predicting the trend of the roomtemperature ahead of time, adjusting the opening degree of the water valve in time by resetting a supply air temperature control valve, preventing possible system shock caused by adjustment after thetemperature is over-adjusted traditionally, realizing control of the supply air temperature as required, realizing rapid temperature control and running comfortably.

The invention discloses a control driving system for a universal rack, which can realize stable and reliable rack rotation control and high control precision. A photoelectric encoder and a potentiometer are arranged on the rack and a motor respectively, two measurement angle values are calibrated through an angle calibration module, and thus, a self-calibration function is realized; in the case of automatic control, when the rack moves near a target angle, different operating frequencies are transmitted to a frequency converter according to the difference between the current angle and the target angle, the relationship between the angle difference and a motion speed can simulate a damped motion curve, the motion speed of the rack just reaches 0 when the rack moves to the target angle, and thus, zero overshoot control is realized, and the rotation precision is high; and through detecting the position of a treatment couch in real time through an automatic anti-collision control unit and an anti-collision and anti-over turning control module, collision between the rack and the treatment couch is automatically prevented.

The invention discloses a method for controlling the torque change rate of a permanent magnet synchronous motor. The method comprises the following steps of a detecting step: detecting the three-phase current and rotary speed of an armature of the motor during operation in real time; a converting step: converting the detected armature three-phase current into a motor alternating-direct axle current based on Clark-Park conversion and calculating a corresponding alternating-direct axle voltage; a torque adjusting step: calculating a modulation factor Mindex based on the alternating-direct current and voltage obtained in the conversion step and adjusting the outputted torques at different torque change rates in a sectional mode according to the range of the modulation factor Mindex value. According to the method and device for controlling the torque change rate of the permanent magnet synchronous motor, a relatively faster torque responding speed is adopted during the control of the maximum torque current ratio, and a relatively smoother torque responding speed is adopted during flux weakening control. The motor is stable in torque outputting, strong in antijamming capacity and fast in accelerated speed and the system is high in brake efficiency. Current impact of the system during high speed can be effectively prevented and the motor in flux weakening control is prevented from being out of control.

The invention provides a door lock rotating device and a washing machine door lock with the same, and belongs to the technical field of washing machine door locks. A door lock rotating matching structure comprises a rotating piece, a rotating piece resetting elastic part, a lock catch, a lock catch resetting elastic part and a locking matching structure; when a door is closed, a door hook is inserted into a lock shell, the rotating piece drives the locking matching structure to rotate, the locking matching structure guides the lock catch to move to a lock catch locking position, and then the rotating piece is locked; and when the door is opened, the door is pushed slightly in the direction of closing the door, the rotating piece continuous driving the locking matching structure to rotate, the locking matching structure guides the lock catch to move to a lock catch resetting position, the rotating piece rotates, and then the door hook is unlocked. The door lock rotating matching structure can be quite conveniently used on the outside of a door panel of a washing machine, a handle for pulling the door is not required, and moreover, the door lock rotating matching structure can also be used on a washing machine with a handle on the outside of a door panel, and is wide in application range and convenient to use.

The invention relates to a dynamic slight press fan-shaped section hydraulic system leakage fault on-line judging and early warning method, which belongs to the technical field of continuous casting equipment maintenance in the metallurgical industry. The method has the technical scheme that (1) a roll gap control system PLCS7-300 sends a 'fan-shaped section hydraulic system locking' order to a remote station PLCS7-300; (2) the pressure value of the fan-shaped section hydraulic system is fed back; (3) the value of a fan-shaped section displacement sensor is fed back; (4) the roll gap control system PLCS7-400 judges the feedback pressure value of the hydraulic system and the value of the fan-shaped section displacement sensor combinedly; and further the results are output to a continuous casting master control system. With the method disclosed by the invention, roll gap control loss caused by the leakage fault of the hydraulic system can be prevented, the actual roll gap is controlledto meet the scope designed by the technology, the contraction taper of the roller gap is ensured to guarantee casting blank quality, an early warning function is played to protect fan-shaped section equipment, key equipment is monitored comprehensively and managed automatically in the whole continuous casting production process, the continuous casting production is stabilized, the technical control level is improved, the product quality is improved, and economic benefits are created.

The invention discloses a polymer composite membrane, a method for preparing the same and a lithium ion battery with the polymer composite membrane. The polymer composite membrane comprises a porous basement membrane and heat-resistant layers. The heat-resistant layers cover at least one side surface of the porous basement membrane and comprise a plurality of heat-resistant sub-layers, the heat-resistant sub-layers are sequentially arranged in a stacked manner, and pore closing temperatures of the various heat-resistant sub-layers are sequentially increased from the inside to the outside; thevarious heat-resistant sub-layers comprise first heat-resistant polymer materials and / or second heat-resistant polymer materials and are independently of fiber network structures; the melting points of the first heat-resistant polymer materials are not lower than 200 DEG C; the melting points of the second heat-resistant polymer materials are not lower than 100 DEG C. The polymer composite membrane, the method and the lithium ion battery have the advantages that the multiple heat-resistant sub-layers with the sequentially increased pore closing temperatures are formed and can be softened in different temperature ranges, accordingly, the polymer composite membrane has dynamic (phased) pore closing behavior to adapt to internal excessive heating of the battery, diaphragm thermal runaway dueto pore breaking phenomena can be effectively prevented, and the battery is safe at the high temperatures.

The invention provides a vinyl acetate storage device, which comprises a vinyl acetate storage tank, a vinyl acetate material feeding valve, a temperature detecting device, a cooler, a water spray device and a standby device, wherein the vinyl acetate material feeding valve and the temperature detecting device are arranged on the vinyl acetate storage tank, and the vinyl acetate storage tank is connected with the standby device via the cooler. When the vinyl acetate storage device is used for storing crude vinyl acetate, reasonable alarming temperature is set and effective control measurements are put forward for the crude vinyl acetate stored in the vinyl acetate storage device during operation and stoppage of the vinyl acetate storage device, so that self-polymerization reaction of the crude vinyl acetate is further prevented from being out of control, and the crude vinyl acetate is guaranteed to be safely stored under the static condition and to be safely operated under the dynamic situation.

The invention discloses an active braking force distribution and control system with a tire pressure monitoring function. The system comprises a tire pressure sensor (100), a wireless receiver (200), an active braking force distribution and control system controller (500) with the tire pressure monitoring function, a braking pressure adjuster (600) and a multichannel braking pressure control module, wherein the tire pressure sensor transmits detected tire pressure to the wireless receiver; the receiver sends a tire pressure signal to the braking force distribution and control system controller; the controller analyzes pressure conditions of tires, processes different situations and controls the braking pressure adjuster through the multichannel braking pressure control module respectively to adjust the braking forces of all wheels to optimal values according to required total braking force distribution, so a vehicle can keep moving forward stably and deaccelerate slowly; meanwhile, the braking force distribution and control system controller communicates with an engine controller (800) to require to reduce an output torque, so the vehicle deaccelerates slowly or stops. The active braking force distribution and control system is applicable to various automobiles.

A lead acid battery for an electric vehicle has to face more use requirements of big capacity, long cycle life, big discharge current, short charging time and the like because the lead acid battery powers the vehicle, particularly a higher requirement on the charging technology. For the conventional three-stage charging technology, on the one hand, if the set breakover voltage from the first stage to the second stage is lower, the battery is insufficiently charged, which causes the quick reduction of the capacity of the battery, and if the set breakover voltage is higher, the loss of electrolyte and heating of the battery are caused due to positive overcharge; on the other hand, because different batteries are different in additive formulas, the ideal breakover voltage and breakover current are different; and the lead acid battery is passively charged by a charger, if the charger and the battery require different rated voltage or anode-cathode directions, the damage of the battery or charger can be caused. Because a charging inference function module lowers the charging potential of the battery by continuously using negative pulse to discharge at the later stage of charging, the polarization potential difference between the charger and the battery is ensured, and the battery can be charged more fully; pole plate active materials of the battery are electrochemically reacted at a low potential, so that the gassing amount generated is greatly reduced; simultaneously, due to enough charging break time, the oxygen separated from the anode is ensured to undergo reaction with hydrogen to obtain water when reaching the cathode, and the enough time for heat dissipation is also ensured; and the service life of the lead acid battery is prolonged.