44results about How to "Safe return" patented technology

The invention discloses an unmanned aircraft electric quantity early warning method and a device; the method comprises the following steps: using a satellite positioner to obtain inward journey drop point information of the unmanned aircraft; obtaining present position information of the unmanned aircraft, and calculating a horizontal distance and a vertical height difference between the present position of the unmanned aircraft and the inward journey drop point; obtaining battery state information of the unmanned aircraft, and calculating a maximum horizontal distance and a maximum climb or descending height of the unmanned aircraft using residual electric quantity at a preset flight speed; determining whether the electric quantity of the unmanned aircraft has reached a lowest critical point of safety inward journey or not according to the horizontal distance and the vertical height difference between the present position of the unmanned aircraft and the inward journey drop point, and the maximum horizontal distance and the maximum climb or descending height of the unmanned aircraft using residual electric quantity at the preset flight speed; if yes, controlling the unmanned aircraft to fly back. The unmanned aircraft electric quantity early warning method and the device can maximize a task flight time while ensuring the safety of the unmanned aircraft, thus maximizing the utilization efficiency of the aircraft.

The present invention provides, in at least one embodiment, a power rack apparatus for lifting dumbbells. The apparatus can have a conventional cage design or a novel cage design with dual pull up bars. The apparatus also has novel dumbbell trays configured to attach to a novel horizontal support. The horizontal support is configured to attach to the cage in a plurality of vertical positions and the horizontal support contains a plurality of slots for horizontal width adjustment of the dumbbell trays. The slots on the horizontal support are configured to receive a plurality of inclined dumbbell trays. The apparatus can be a combo power rack configured to hold barbells and dumbbells or a simplified power rack apparatus configured to just hold dumbbells.

A programming device for making a program for returning a robot to its waiting position when the robot is stopped by an error. A robot control device is connected to the programming device via a network line. When the robot during operation is stopped by the error, information including data of a position where the robot is stopped is transferred to the programming device. The programming device makes the returning program, based on layout data, the received information and data including teaching positions and attribute data of the positions, by which the robot may be returned from the stop position to the waiting position without interfering with peripheral devices. The returning program is executed by using an offline simulation function of the programming device. The program is transferred to the robot control device after it is judged that interference will not occur. The robot may be safely returned to the waiting position by executing the returning program.

An off-road trail recording method and apparatus for use with a navigation system for recording an off-road trail when a vehicle travels in an off-road area to safely return to the original road. The off-road trail recording is achieved without regard to on / off settings of the off-road trail recording function by the user. The navigation system automatically detects that the vehicle has left the road and starts recording the off-road trail in a background mode. When the user turns on the off-road trail recording function later, the navigation system prompts the user to decide whether the off-road trail recorded in the background should be recovered in a normal mode. The navigation system provides various means for recording the off-road trail with reduced resolution when the memory capacity is exhausted or insufficient.

An unmanned aerial vehicle (100) return path planning method and device are disclosed. The return path planning method comprises the steps of obtaining the current position, the target position to bereturned and preset flying limit area information of the unmanned aerial vehicle (100) if the triggering information used for indicating that the unmanned aerial vehicle automatically returns in the flying process of the unmanned aerial vehicle (100) (s101);and planning a return path of the unmanned aerial vehicle (s102) according to the current position, the target position to be returned and preset flying limit area information. The influence of the flying limit area is considered when automatic return path of the unmanned aerial vehicle is planned, so that the unmanned aerial vehicle can besafely returned after the unmanned aerial vehicle is out of control. The unmanned aerial vehicle can be prevented return failure of the unmanned aerial vehicle due to the unmanned aerial vehicle falling into a flying limit area and being clamped at the edge of the flying limit area.

In a voltage booster apparatus, a charge control transistor is turned on to charge a coil output capacitor and a booster output capacitor and then turned off, thereby confirming rise of a coil output voltage and a booster output voltage. A power supply relay is turned on to restore a booster operation thereby to check rise of the booster output voltage. If both of a step-up FET and a step-down FET are not in short-circuit failure, ON state of the power supply relay is fixed thereby to restore a power steering system operation.

The invention discloses a vehicle warning device capable of automatically detecting a highway guardrail position. The vehicle warning device comprises a warning board and a warning board installation base, wherein the warning board installation base is provided with a power supply module, and the vehicle warning device also comprises a distance measurement module capable of measuring a distance from the warning board installation base to the highway guardrail position, and the distance measurement module is electrically connected with the power supply module. The warning board is high in arrangement speed, the intelligence degree is high, the manual intervention is reduced, the moving route is precise, the vehicle warning device can be well adaptive to the unfavorable weather condition and curve road conditions, the windproof performance is good, the warning board is flexible and diversified in transport way and is adaptive to different road conditions and weather situations, the warning board can be rapidly moved to a designated place, the warning board can be automatically restored after rolling over, and the cost is low.

Provided is an emergency load rejection mechanism of a deep-sea manned submersible. The emergency load rejection mechanism of the deep-sea manned submersible comprises a rotary shaft, wherein the rotary shaft penetrates through a pressure-resistant spherical shell cabin, a hand lever is inserted into the upper end of the rotary shaft, the middle of the rotary shaft is installed in a shaft sleeve through a shaft sealing device, the shaft sleeve is arranged under the pressure-resistant spherical shell cabin, a ballast hanging protruding claw wheel is installed at the lower end of the rotary shaft, the ballast hanging protruding claw wheel is inserted into a hole in the top surface of a ballast block, and hanging is achieved; two guiding slide ways are formed in each of the four vertical planes of the ballast block so that the ballast block can be smoothly rejected under the conditions of different inclined postures of the deep-sea manned submersible. According to the emergency load rejection mechanism of the deep-sea manned submersible, an operator directly rotates the T-shaped hand lever to reject the emergency ballast block so that the deep-sea manned submersible can obtain enough buoyancy to upwards float to the water surface in emergency, the problem that when a control system has a failure, a submersible cannot reject ballast block to upwards float is solved, and it is ensured that the manned submersible can return safely.

One aspect of the invention provides a sports equipment collection and return device including: a vacuum tube terminating in an opening; a return adapted and configured to return the sports equipment to a user; and a vacuum source adapted and configured to apply vacuum to the vacuum tube to draw the sports equipment from the inlet to the return.

Biomass (e.g., plant biomass, animal biomass, and municipal waste biomass) is processed to produce useful intermediates and products, such as amino-alpha, omega-dicarboxylic acid and amino-alpha, omega-dicarboxylic acid derivatives. These products include polymers and copolymers of alpha-amino, omega-dicarboxylic acids.

Biomass (e.g., plant biomass, animal biomass, and municipal waste biomass) is processed to produce useful intermediates and products, such as aliphatic hydroxy-carboxylic acid and hydroxyl-carboxylic acid derivatives. These aliphatic hydroxy-carboxylic acids are, in turn, polymerized. The polymerization is carried out using a thin film evaporator or a thin film polymerization / devolatilization device. Conversion of lactic acid to poly lactic acid is an especially useful product to this process.

In a voltage booster apparatus, a charge control transistor is turned on to charge a coil output capacitor and a booster output capacitor and then turned off, thereby confirming rise of a coil output voltage and a booster output voltage. A power supply relay is turned on to restore a booster operation thereby to check rise of the booster output voltage. If both of a step-up FET and a step-down FET are not in short-circuit failure, ON state of the power supply relay is fixed thereby to restore a power steering system operation.

The invention relates to an umbilical cable which adopts a central force bearing layer comprising a steel wire and a nylon rope, wherein an insulated core layer A, an insulated core layer B, an insulated core layer C, an insulated core layer D and a nylon braided sleeving are sequentially wound outside the central force bearing layer, wherein the insulated core layer A, the insulated core layer B, the insulated core layer C and the insulated core layer D have different specifications, numbers and winding directions of leads; the nylon braided sleeving is arranged outside the insulated core layer D; the lead comprises a conductor; an insulating layer is wound outside the conductor; and a shield is woven outside a sintered wire core. The invention overcomes the defects that the functions of the current cables can not meet the space environmental requirements, and the structure and appearance are ugly, big, black, thick and hard; and the umbilical cable is suitable to be used as a cable used in the space environment, especially suitable to be used as a cable for extravehicular activities in the space for astronauts of manned spaceflight engineering.

The embodiment of the invention discloses an unmanned aerial vehicle return method and device, an unmanned aerial vehicle and a storage medium, and the method comprises the steps: calculating the remaining flight time and return time of the unmanned aerial vehicle according to a preset period in a process that the unmanned aerial vehicle operates according to a preset operation path; determining whether the remaining flight time is greater than return time; if yes, obtaining a target return point on the preset operation path, and determining whether to return to the step of calculating the remaining flight time and return time according to the preset period or not according to the current position and the target return point; if not, taking the current position as a target return point, and flying from the target return point to the return destination when flying to the target return point; and if not, determining the current position as a target return point, and flying from the target return point to the return destination. According to the embodiment of the invention, the operation efficiency and the battery energy utilization rate of the unmanned aerial vehicle can be improved, the unmanned aerial vehicle can have enough electric quantity to return, and safe return of the unmanned aerial vehicle is ensured.

The invention discloses a pathfinding network topology structure for emergency communication and a routing method thereof,in order to solve the problem that in the prior art, an emergency communication pathfinding network topology structure is complex. According to the implementation scheme, a pathfinding network is divided into a vehicle-mounted network layer and an individual soldier network layer, one layer is formed by vehicle-mounted nodes with relatively stable structures, the other layer is formed by individual soldier backpack or handheld nodes with dynamically changing structures, andthe individual soldier nodes have a relay routing function. The vehicle-mounted network is used as a target network of the route, and the individual soldier network is used as a source network and arelay network of the route. According to the routing method based on the pathfinding network topological structure, for a two-hop network, transmission time delay caused by different channel conditions of feasible paths and processing time delay caused by processing of data packets by relay nodes are comprehensively considered, and an optimal path is selected to transmit the data packets under thecondition that the energy of individual soldier nodes is limited. The pathfinding network topology structure is simple in structure and small in end-to-end time delay, and can be used for emergency communication of major sudden disasters in cross-border geological complex areas.

The invention discloses a wind driven straight-wing propeller remote control unmanned ship. Two ship demihulls of the unmanned ship are arranged on the lower portions of the two ends of a frame structure in a spaced mode; a rotary main shaft of a lift force type perpendicular shaft wind wheel is vertically arranged at the upper end of the middle portion of a longitudinal girder, multiple lift force type blades are vertically arranged at intervals in the circumferential direction with the rotary main shaft as a center line, the upper end and the lower end of each lift force type blade are connected with the outer end of a connecting board, and the inner ends of the connecting boards are connected with the rotary main shaft; the rotary main shaft penetrates through a wind driven generator and extends downwards to the input end of a gearbox; and the output end of the gearbox is connected with the front end of a transmission shaft, and the rear end of the transmission shaft is connected with the input end of a straight-wing propeller. Wind power is used for directly driving the unmanned ship propeller to rotate to propel the unmanned ship to sail, a storage battery carried along the ship is charged through solar cell panels and the wind driven generator installed on a hull so as to serve as stored energy, and the theoretical infinite endurance of the unmanned ship is achieved.

The invention discloses a safe and precise fire-fighting method based on an intelligent fire-fighting robot. The safe and precise fire-fighting method comprises the step (1) of detecting a fire sourcewith the maximum temperature through a sensor; the step (2) of detecting the temperature around the robot through the sensor at the same time, and controlling the robot to walk to the optimal fire-fighting distance from the fire source based on a set robot safety temperature threshold; the step (3) of measuring the optimal fire-fighting distance between the robot and the fire source through the sensor; the step (4) of calculating the optimal spraying angle and minimum initial velocity of fire extinguishing agents based on the found optimal fire-fighting distance between the robot and the firesource, and implementing fire fighting. The method further comprises the process of monitoring whether the robot should be returned safely or not according to the conditions of power consumption andthe fire extinguishing agents.

The invention relates to a power supply method for a drone with multiple battery packs. The drone includes a drone body, a drone power supply system includes a power module and a mainboard control module for controlling the operation of the power module, and the power module includes a plurality of battery assemblies which are connected in parallel. The method comprises the following steps that S1, the battery assemblies are numbered as the first battery assembly, the second battery assembly, ... and the nth battery assembly separately in a use order; S2, the motherboard control module startsthe first battery assembly according to the numbering sequence; S3, when the electric quantity of the first battery assembly is equal to or less than a critical electric quantity value, the mainboardcontrol module controls the first battery assembly to stop working and simultaneously starts the second battery assembly; S4, when the electric quantity of the second battery assembly is equal to or less than the critical electric quantity value, battery switching is performed according to the method in step S3 until the nth battery assembly is started; S5, when the remaining electric quantity ofthe nth battery assembly is equal to or less than a return electric quantity value, the mainboard control module controls the drone to automatically return.

Biomass (e.g., plant biomass, animal biomass, and municipal waste biomass) is processed to produce useful intermediates and products, such as hydroxy-carboxylic acids and hydroxy-carboxylic acid derivatives. A method includes treating a reduced recalcitrance lignocellulosic or cellulosic material with one or more enzymes and / or organisms (such as lactobacillus, Pediococcus, Rhizopus, Enterococcus) to produce an alpha, beta, gamma and / or delta hydroxycarboxylic acid (such as lactic acid, glycolic acid); and converting the alpha, beta, gamma and / or delta hydroxy-carboxylic acid to the product (such as esters, polymers, and copolymers).

The invention discloses a multipurpose screw and idler wheel coupling drive device, belonging to mechanical drive devices. A conventional coupling drive device has the disadvantages of stress concentration, fatigue fractures, surface abrasion or limited linear displacement distance in the process of converting the rotational movement to linear movement or movement in a big curve. The multipurpose screw and idler wheel coupling drive device comprises a track, a pulley, a screw, a driving device and idler wheels. The pulley slides along the track and is connected with a load to output kinetic energy. The screw is axially positioned on the pulley and can rotate along the axis of the pulley, and the screw extends in the same direction with the track. The driving device is arranged on the pulley to drive the screw to rotate around the axis of the pulley. The idler wheels are lined on the track in the extension direction of the screw and the idler wheel corresponding to the screw is located inside a spiral groove of the screw. The multipurpose screw and idler wheel coupling drive device can change the rotation direction of the screw by converting the coupling of the screw and the idler wheels to linear or approximately linear movement, and in such a way, the motion direction of the pulley can be changed and the transmission efficiency is high. The screw can be coupled with a plurality of idler wheels at the same time, so stress concentration can be avoided and the reliability and the safety are improved.

Biomass (e.g., plant biomass, animal biomass, and municipal waste biomass) is processed to produce useful intermediates and products, such as hydroxy-carboxylic acids and hydroxy-carboxylic acid derivatives.

The invention discloses a mechanical branch clamp which comprises a mobile wheel frame, a lifting base, a telescopic pole, a branch clamp connected to the upper end of the telescopic pole and a power device, wherein the lifting base is fixedly connected to the upper part of the middle of the mobile wheel frame; the telescopic pole is hinged with the upper part of the rear side of the lifting base; a telescopic air cylinder is also hinged with the upper part of the mobile wheel frame; the upper end of the telescopic air cylinder is connected to the side of the telescopic pole and the telescopic air cylinder is used for driving the telescopic pole to rotate; the power device is used for controlling telescoping of the telescopic rod and operation of the telescopic air cylinder. The mechanical branch clamp is simple and flexible in structural design and can be matched with most of high-altitude pruning devices for use; branches are clamped by using the device mechanical branch clamp when needed to be pruned and then the high-altitude pruning devices are operated, and the condition that the sawed branches do not directly fall off freely can be ensured after the branches are sawed off, so that the security is high and the branches can be recovered and safely carried back to the ground.

The invention discloses a wireless charging unmanned aerial vehicle and a charging method. The wireless charging unmanned aerial vehicle comprises an unmanned aerial vehicle framework, a flying part and a charging part, wherein the unmanned aerial vehicle framework comprises a central frame and four machine arms, the four machine arms extend outwards from the central frame and are fixedly connected with the central frame, the flying part comprises screw blades and driving devices, the screw blades are arranged on the four machine arms respectively, the driving devices are connected with the screw blades in a transmission mode respectively, the charging part is fixedly installed in the central frame and comprises an electrical storage device, a wireless charging device and a wireless charging plate, the electrical storage device is fixedly installed at the bottom of the central frame, the wireless charging device is connected with the electrical storage device, the wireless charging plate is arranged at the top of the central frame, a solar panel is arranged on one side of the charging part, and the electrical storage device is electrically connected with the wireless charging device. The flying part drives the wireless charging plate of the charging part to be in butt joint with a receiving unmanned aerial vehicle to achieve air wireless charging, the unmanned aerial vehicle can achieve one-to-many continuous powering for returning on a plurality of unmanned aerial vehicles in the same wireless network area, so that the safe returning capability of the unmanned aerial vehicle is ensured.

A control method of an unmanned aerial vehicle (1a, 1b, 1c) and an unmanned aerial vehicle (1a, 1b, 1c) are provided. The control method includes generating a return command to make the unmanned aerial vehicle (1a, 1b, 1c) to perform a return movement, which includes at least one cruise phase during which flight parameters of the unmanned aerial vehicle (1a, 1b, 1c) are measured, allowing the unmanned aerial vehicle (1a, 1b, 1c) to enter a high wind blockage state when it is determined that the unmanned aerial vehicle (1a, 1b, 1c) is in the high wind blockage state based on the flight parameters; measuring flight parameters in the high wind blockage state; and allowing the unmanned aerial vehicle (1a, 1b, 1c) to enter the cruise phase when it is determined that the unmanned aerial vehicle(1a, 1b, 1c) is out of the high wind blockage state based on the flight parameters.

The invention discloses an intelligent switching system for an operating room and an anesthesia recovery room, and relates to the technical field of medical management. The shift change system comprises a display terminal and a shift change medical equipment terminal, the display terminal comprises a shell, a display screen and an integrated circuit board arranged in the shell. The integrated circuit board comprises a central processing unit, a wireless communication module, an information storage module, a power supply module and a display module connected with the touch display screen; and the display terminal is in wireless communication connection with the shift-change medical equipment terminal, and is used for receiving patient operation basic information and shift-change key attention information sent by the shift-change medical equipment terminal, storing the information in the information storage module and wirelessly transmitting the information to the display module to be displayed through the display screen. According to the invention, the display terminal and the shift-change medical equipment terminal are arranged, so that the patient information can be quickly and accurately uploaded and displayed in real time through the display screen, the medical staff can conveniently master the physical condition of the patient, and the shift-change efficiency and the information transmission accuracy are improved.

The invention provides a water intake system of an unmanned aerial vehicle. The water intake system comprises a winch and a water intake bottle; a wire reel is arranged in the winch; a suspension wireis wound around the wire reel and is led out from beneath a shell; the water intake bottle comprises a bottle cap, a bottle body and a bottle bottom; the suspension wire led out from beneath the shell is connected to the bottle cap; the bottle cap is provided with a plurality of openings; a movable cover is movably hinged to each opening; a circular-truncated-cone-shaped structure is formed at the bottle cap after the movable covers cover and seal the openings; the bottom surface of the bottle bottom is provided with a circular water inlet; a circular baffle is arranged above the water inlet;the radius of the water inlet is smaller than the radius of the circular baffle; and a plurality of limiting assemblies are arranged on the upper surface of the bottom surface of the bottle bottom and define a movable area above the water inlet. According to the water intake system, the bottom surface of the bottle bottom is provided with the circular water inlet, so that sampling is facilitated;and the bottle cap is in a circular truncated cone shape, so that the resistance of the water intake bottle in water can be reduced to a great extent, and the stability of the unmanned aerial vehicleis guaranteed.