220results about How to "Reduce crash" patented technology

The invention discloses a four-rotor aircraft fault-tolerant control method and belongs to the field of aerocraft control. According to the method, first, based on a mathematical model of an aircraft, an attitude model under the condition of system faults of the aircraft is established; then, according to the attitude model, an adaptive law of fault estimation of an aircraft system is brought out, and a transfer function of loss of actuator effectiveness of the aircraft is also established; an adaptive law of fault estimation of loss of actuator effectiveness is put forward based on the loss of actuator effectiveness; and at last, based on the fault estimation of the system and the fault estimation of loss of actuator effectiveness, a fault-tolerant controller of an aircraft attitude system is designed. Thus, fault-tolerant control of four-rotor aircrafts is realized. By means of the method, probability of air crashes of four-rotor aircrafts is remarkably reduced, and flying reliability and safety of aircrafts are improved.

The invention discloses a quick and safe landing device and method for an unmanned aerial vehicle, belonging to the unmanned plane field. The quick and safe landing device for an unmanned aerial vehicle is provided with a trigger device which can trigger the unmanned aerial vehicle to execute the safe and quick landing mode; the unmanned aerial vehicle comprises a memory, a flight control device and a rotor; the memory is used for storing the preset safe and quick landing speed; the flight control device can control landing of the unmanned aerial vehicle according to the preset safe and quick landing speed; the rotor can be used for adjusting the rotation speed under the control of the flight control device; and the flight control device is connected with the memory and the rotor. The quick and safe landing device and method for an unmanned aerial vehicle can realize safe and quick landing of the unmanned aerial vehicle, and not only can reduce the air crash risk caused by too fast landing speed of the unmanned aerial vehicle, but also can prevent accidents caused by waiting for a too long time because of too slow landing speed of the unmanned aerial vehicle and the insufficient electric quantity.

The invention provides an intelligent course control method for an unmanned plane. The method comprises the steps that power-on self-test is conducted on the unmanned plane, the course and the GPS coordinates of a takeoff point in a northeast coordinate system are recorded, and the unmanned plane takes off in a common remote control mode; an initial course locking mode or a return flight point locking mode is selected; if the initial course locking mode is selected, the course of the unmanned plane at the takeoff point is used as the initial course, and intelligent course control is achieved under a rectangular coordinate system with the takeoff point as the original point; if the return flight point locking mode is selected, intelligent course control is achieved under polar coordinates with the takeoff point as the polar point. According to the intelligent course control method for the unmanned plane, crashes of the unmanned plane or contact lost accidents caused by misoperation conducted due to the fact that control staff can not judge the current course when being unskilled in operation or the flight distance is too long can be effectively reduced, operation of the unmanned plane can be greatly simplified, and the flight safety of the unmanned plane is improved.

The invention discloses a method and a system for automatically following a car by means of a mobile terminal. The method for automatically following the car by means of the mobile terminal includes: the mobile terminal is connected with a car control terminal; the mobile terminal opens a high-definition camera to monitor the road; the mobile terminal acquires a current road information, a car information and a current section information; the mobile terminal analyzes the acquired informations; the mobile terminal sends a control command to the car control terminal according to the analysis result or sends out a voice prompt command according to the analysis result. The method and the system for automatically following the car and assisting parking by means of the mobile terminal are capable of automatically following the car and assisting parking.

A gear mechanism having extremely less backlash, capable of suppressing the rattling noise of gears, having a large loading resistance in the thrust direction, and capable of transmitting high torque by using the gears transmitting a force by the meshing of the gears with each other in place of the transmission of the force by friction. The gear mechanism is formed by disposing the plurality of spur gears in the meshed state with each other. The screw-like gears (2) and (4) are disposed on the same axis as the spur gears (1) and (3) in the meshed state with each other. The screw-like gears (2) and (4) adjacent to each other are formed in screw shapes having lead angles extending in the reverse directions to each other and equal in angle to each other. The spur gear (1) and the screw-like gear (2) are rotated integrally with each other to transmit its rotation to the spur gear (3) and the screw-like gear (4) adjacent to each other.

The invention discloses a cutting machine for foamed concrete blocks, which comprises a rectangular frame and a cutting device. Four guide columns are vertically arranged at four corners of the rectangular frame. The cutting machine is characterized in that the cutting device comprises a transverse cutting mechanism and a vertical cutting mechanism. Compared with the prior art, the cutting machine has the advantages that the transverse cutting mechanism and the vertical cutting mechanism are separately arranged, so that cross interference can be well avoided. Further, since the transverse cutting mechanism and the vertical cutting mechanism are both obtained by basically identical structures, the integral structure is relatively simple, implementation is convenient, and implementation cost is low. Transverse cutting and longitudinal cutting are operated separately, a travelling mechanism drives a cutting wire to reciprocate for extruding cutting during reciprocated friction, and accordingly cutting resistance is greatly reduced while energy loss is reduced. More importantly, smoothness in cutting is improved, concrete blank disintegration is avoided, cutting success rate is greatly increased, and product scrappage is decreased.

The invention discloses an intelligent robot fault diagnosis method based on artificial intelligence, a system, an intelligent robot and a mobile terminal. The intelligent robot fault diagnosis comprises steps of capturing the problem state of the intelligent robot when the intelligent robot detects the fault produced by the intelligent robot, generating a problem two dimension code of the network environment problem or the system fault problem and displaying when the problem state is determined to be the network environment problem or the system fault problem so as to enable the mobile terminal to scan the problem two dimension code in order to obtain the corresponding fault information, receiving the user operation aiming for the fault information, generating a diagnosis two dimension code according to the operation, performing scanning and recognition on the diagnosis two dimension code to obtain the diagnosis information corresponding to the diagnosis two dimension code, and regulating the intelligent robot according to the diagnosis information. The intelligent robot fault diagnosis method enables the intelligent robot to be easy to maintain, reduces the paralysis, shut-down and repair rate of the intelligent robot, enables the user to use and maintain the intelligent robot at a pretty low learning cost, and improves the user experience.

Provided is a cable drag chain wherein braking can be applied to frame pivoting, and that furthermore has excellent producibility. The cable drag chain is constructed such that multiple frames (F) are formed coupled to be mutually pivotable, and a long body, such as a cable, is arranged in a guide part enclosed by each frame. The cable drag chain has a construction wherein, between the coupled frames (F1, F2), the pivot angle of the frame (F2) is restricted by contact between a stopper piece 31 (stopper receiver 42) of the one frame (F1) and a stopper receiver (41) (stopper piece 32) of the other frame (F2). The cable drag chain also has a construction wherein elastic projections (51, 52) of the one frame (F2) contact a receiver part (61) of the other frame (F1) when the coupled frames (F) are pivoted, and braking is applied to the relative rotation of the two frames (F1, F2) by the elasticity of the elastic projections (51, 52).

An ink cartridge (500) mounted on a carriage reciprocating together with a coating head and supplying an ink in an atmosphere side storage part (270) and a supply side storage part (290) to the coating head. The atmosphere side storage part (270) and the first and second ink storage parts (292) and (294) are formed of the liquid storage recessed part (122) of a cartridge body (120) opened on one surface side opposed to the coating head in the reciprocating direction and a film (140) sealing the opened face of the liquid storage recessed part (122). Agitating mobile bodies (711) are stored in the atmosphere side storage part (270) and the second ink storage part (294) in a movable state.

A small-sized tugboat belongs to the technical field of tugboats and comprises a tugboat body, a mooring rope, a stern roller, a shark jaw, a large tow, a superstructure, an anchor windlass, anchors, bow propellers, a left propeller, a middle propeller, a right propeller and cushion tires. The tugboat body is formed by welding steel plates, the stern of the tugboat body is provided with the cylindrical stern roller, the superstructure is arranged on the upper surface of the main deck of the tugboat body, the anchor windlass is arranged in front of the superstructure, the anchors are arranged on the anchor windlass in a suspension mode through anchor chains, the large tow is arranged behind the superstructure, the shark jaw is arranged between the large tow and the stern roller, the midpoints of the large tow, the stern roller and the shark jaw form a straight line, the bottom of a bow is provided with the bow propeller, the bottom of the stern is provided with the left propeller, the middle propeller and the right propeller from left to right, and the periphery of the tugboat is provided with the cushion tires. Therefore, the novel small-sized tugboat solves the problems that the transportation costs are over-high, the turning is inconvenient and inflexible, long-term friction between the stern of the tugboat body and a tow line causes potential safety risks to transportation, the tow line is extremely prone to swinging from side to side during a towing process of the tugboat so that the direction of the tugboat is not easy to control and the like in many tugboats.

The utility model discloses a brake control device for elevator, which doesn't produce any action lagging when rescinding the brake, and doesn't need gradually increase the control of the winding current when braking, so the invention can reduce the collision sound of the brake. In the brake control device for elevator, when the brake is rescinded, the winding current is controlled by any one current in stepped currents of one to three steps; when the brake is being applied, the winding current is controlled by the stepped current of one to two steps.

The invention provides an obtaining method of data. The obtaining method of the data comprises that a play order sent by a play client side is obtained by a data obtaining device; the data is downloaded by the data obtaining device according to the play order and a fixed data size is reached; and the data needed by the play client side is sent to the play client side by the data obtaining device according to the play order. According to the obtaining method of the data, the play client side can initiatively obtain the data from the data obtaining device according to requirements of the data client side and the data size downloaded is limited in a certain range so that the problem of stored data redundancy caused by unlimited downloading of the data by the data obtaining device is solved and the phenomena of corruption of the play client side are reduced.

The embodiment of the invention discloses a complex terrain adaptive landing gear of a vertical take-off and landing aircraft and a landing method of the complex terrain adaptive landing gear. The device comprises at least two landing legs, two movable joints, a scanning detector, a terrain recognition camera and load sensors, wherein upper connecting rods in the landing legs are connected with anundercarriage adapter frame through the movable joints, the upper connecting rods are connected with lower connecting rods through the movable joints, buffer mechanisms are installed in the lower connecting rods, foot end devices are installed at the tail ends of the landing legs, and load sensors are located between the lower connecting rods and the foot end devices; the two movable joints are used for controlling the moving postures of the upper connecting rods and the lower connecting rods respectively; the upper end of the load sensor is connected with the buffer mechanism, and the lowerend is connected with the foot end device; the scanning detector and the terrain recognition camera are mounted below the vertical take-off and landing aircraft; and the load sensors are used for measuring the ground load of the landing legs after the landing legs touch the ground, and controlling the posture of the landing legs by feeding back the ground load of the landing legs to a flight control system. The device disclosed by the embodiment of the invention solves the problem that an existing landing gear is generally poor in adaptability in the landing process.

A twin-clutch transmission that can always effectively reduce gear shift shock and a collision sound even under the existence of variation attributed to component tolerance and change over the ages attributed to wear. A twin-clutch transmission calculates a rotational speed difference (|Na−Nb|) between an odd-stage main shaft rotational speed (Na) and an even-stage main shaft rotational speed (Nb) and learns synchronization start gear shift drive displacement (θs) detected by a gear shift drive displacement detecting unit at the timing at which the rotational speed difference (|Na−Nb|) reaches a predetermined synchronization start determination rotational speed difference (Ds) from gear shift start. The twin-clutch transmission controls an actuator on the basis of the learned synchronization start gear shift drive displacement (θs).

The invention relates to a numerical control device capable of reducing noises generated in tool replacement motions and machine tool load generated in tool replacement motions; in a rising stroke of the tool replacing motion, the numerical control device can reduce a mobile speed of a main shaft head after the main shaft head rises in a maximum speed; when a plate cam body abuts against a cam driven piece, the mobile speed is lowered; the numerical control device switches the mobile speed of the main shaft head into the maximum speed; in a decreasing stroke, the numerical control device can reduce the mobile speed of the main shaft head after the main shaft head decreases in the highest speed, so when a tool keeping device is arranged on the main shaft, the mobile speed is lowered; the numerical control device then switch the mobile speed of the main shaft to the maximum speed; therefore, the numerical control device can shorten a tool replacing time, reduces noises generated in tool replacement motions and machine tool load generated in tool replacement motions.

The invention discloses a hoisting and conveying fixture for assembly of a cabinet body of a centrally installed switchgear. The hoisting and conveying fixture comprises an assembly base, wherein a horizontal clamping mechanism and a vertical clamping mechanism are sequentially arranged on the assembly base; the assembly base comprises a bottom plate; supporting plates are sequentially arranged on two ends of the bottom plate; two ends of each supporting plate are provided with first hinge plates; a baffle plate is fixedly arranged on the middle part of each supporting plate; second hinge plates are symmetrically arranged on two sides of each baffle plate; and positioning holes are sequentially formed in two ends of the surface of the bottom plate. According to the hoisting and conveying fixture, through the arrangement of the horizontal clamping mechanism and the vertical clamping mechanism, the centrally installed switchgear is fully clamped from the horizontal direction and the vertical direction; reliability and stability during a clamping process are fully ensured; the centrally installed switchgear can be effectively hoisted and conveyed; the phenomenon of damage due to falling is reduced; the whole construction process is accelerated; and the hoisting and conveying fixture has good market prospect and promotion value.

The invention discloses a BCI-based aircraft control system including an EEG acquisition device, a portable EEG signal processing controller and a four-rotor aircraft. The EEG acquisition device includes an open-source brain wave device and a serial communication module. When a user issues a command, the EEG signal is transmitted to the portable EEG signal processing controller. The portable EEG signal processing controller includes a Linux embedded processor and a wireless communication module, when the Linux embedded processor receives the EEG signal and identifies the corresponding instruction, the instruction is sent to the four-rotor aircraft via the wireless transmission module. The four-rotor aircraft is equipped with a flight controller and attitude sensors, and the flight controller receives the corresponding construction through the wireless port and controls the aircraft to generate the specified action and the corrections is carried out according to the feedback attitude of the attitude sensors. The system is suitable for aerial photography, rescue, entertainment and other application scenes, and is helpful for simplify the flight control of the four-rotor aircraft and reduce the accidental crash.

Embodiments of the invention provide a system running method and an operation system, and relate to the field of software development. The system running method comprises the steps of preventing release of an object through hook operation; judging whether the object can be converted into a zombie object or not according to configuration information; and if yes, converting the object into the zombie object and adding the zombie object to a zombie object pool. According to the technical scheme provided by the method, the stability of systems such as an IOS can be improved.

The invention discloses a fragile transverse plane grinding machine used for a rock test. The fragile transverse plane grinding machine comprises a pedestal, a workbench mechanism, an actuating mechanism and a clamping mechanism, a workbench is connected with the pedestal through an elastic component and is limited to a press height by a stop block, sand paper is arranged on the workbench, the actuating mechanism uses a crank slide block principle to realize linear repetitive motion from motor rotation to a guide rod, the clamping mechanism is connected with the guide rod for clamping a rock sample, the rock sample is driven by the motion mechanism, the bottom performs reciprocating motion on the sand paper, and thereby polishing is realized. The grinding machine realizes the stable contact of the rock sample and the sand paper as well as automatic grinding, requirement of rock mechanics test on the extremely fragile rock sample can be satisfied, rate of section edge damage of the rock sample is reduced, and a traditional form of preparation of the fragile rock by artificial operation can be avoided. The structure is simple, the application of the grinding machine is convenient, and the grinding machine is convenient for popularization to the field of the preparation of the rock sample used for indoor rock mechanics test.

The invention relates to the technical field of automobiles, in particular to an automobile provided with cameras, which consists essentially of an automobile body, a mirror reflector and a rearview mirror group, and is characterized by also comprising a rearview camera, two reflective cameras and an image conversion display unit. The image picking-up mirror surface of the camera takes the shape of a convex lens and comprises a heating and blowing device; the rearview camera is positioned at the top of the automobile, the reflective cameras are positioned at the two sides of the automobile body or the positions on the automobile top close to the two sides of the automobile body; the reflective cameras and the rearview camera can be installed in a same shell; the left, middle and right images of the image conversion display unit are respectively corresponding to the left, middle and right road conditions or automobile conditions. Therefore, the mirror reflector and the rearview mirrors can be omitted. The automobile provided with the cameras has the following advantages: the occupation space of the automobile on the road is reduced, the possibility of the crack-up or the scrapping of the mirror reflector is lowered, the utilization rate of the mirror reflector under severe weather conditions is ensured; and the time for the drivers to observe the two sides is shortened, thus causing the drivers to be more concentrated on driving.

The present invention discloses an unmanned aerial vehicle-based high-speed train overhead line system automatic patrol inspection method. The method of the present invention is characterized in that by using an electromagnetic field sensor installed on an unmanned aerial vehicle to detect the alternating electromagnetic field intensity around an overhead line system, the relative position of the unmanned aerial vehicle and the overhead line system is determined, whether a high-speed train exists nearby is determined, and further, the flight route and the attitude of the unmanned aerial vehicle are adjusted; when the nearby high-speed train is detected, the unmanned aerial vehicle rises and suspends. According to the application, the problem that the conventional technology can not satisfy the high-speed train overhead line system automatic patrol inspection demand is solved, the unmanned aerial vehicle navigates automatically when carrying out the patrol inspection on the overhead line system, the influence of the strong electromagnetic interference and the airflow on the unmanned aerial vehicle are reduced, and the air crash accidents are reduced.

The invention relates to a subway auxiliary collision avoidance system and a subway auxiliary collision avoidance method. The collision avoidance system mainly comprises a signal sending device, a signal receiving device, a vehicle interface module, an auxiliary sensing module, a vehicle-mounted host, a power source box power supply circuit, a driving cab collision avoidance warning terminal and a self-inspection and fault diagnosis module. The collision avoidance method includes synchronously performing signal sending and signal collecting, namely sending and collecting signals through receiving and sending combination; performing signal detection by a signal processing unit in real time for distance measuring; when reaching an alarming distance, performing audio alarming by using a buzzer through a prewarning display terminal. Receiving and sending combination technology refers to that the signal sending device and the signal receiving device share a sensor. Compared with the prior art, the subway auxiliary collision avoidance system and the subway auxiliary collision avoidance method have the advantages that bidirectional distance measuring can be realized, and distance measuring accuracy is high.

The invention discloses an acting force regulating mechanism of a furniture upturning device. The acting force regulating mechanism comprises a fixed element, a connecting arm assembly and a fixed seat, wherein the fixed seat is overturned and opened / closed on the fixed element through the connecting arm assembly; the fixed element is provided with a first spring and second spring; one end of the first spring and one end of the second spring are respectively connected with the fixed element, and the other end of the first spring and the other end of the second spring are respectively connected with the connecting arm assembly; the fixed element is also provided with a regulating assembly for regulating an acting force of the second spring, and the regulating assembly at least comprises a fixed frame, a sliding element, a pushing element and a regulating screw; and a regulating action part of the regulating screw is acted through a tool or manually, the regulating screw is located and rotates relative to the fixed frame, drives the sliding element and the pushing element to displace on the fixed frame and releases or compresses the second spring so as to regulate the acting force of the second spring. The acting force regulating mechanism has the characteristics of simple and reasonable structure, safety and reliability, simplicity in production and realization, high regulation speed, convenience in operation as well as labor saving, smoothness, little collision, low noise and the like during starting / stopping.

The invention discloses a heat treatment process of a carbide alloy for cold heading dies, which comprises the following steps: (1) putting the sintered carbide alloy for cold heading dies into a heating chamber of a double-chamber vacuum furnace, and vacuumizing the heating chamber until the pressure of the heating chamber is (2*10-1)-(4*10-1) Pa; (2) heating the heating chamber in two stages, in the first phase, heating the heating chamber to 900 DEG C at a speed of 5-8 DEG C / min, and then carrying out heat preservation for 30-45 minutes, and in the second stage, heating the heating chamber to 1100-1300 DEG C at a speed of 8-10 DEG C / min. and then carrying out heat preservation 30-40 minutes; (3) filling high-purity nitrogen gas as shielding gas in the furnace, under the condition that the vacuum degree is 0.5-0.8 bar, completely soaking a heated product into a cold-chamber oil-quenching bath for 4-6 minutes, then ascending and separating the obtained product, and cooling the obtained product to below 60 DEG C; and (4) putting the obtained product into a vacuum tempering furnace to carry out tempering treatment for 5-6 hours at a tempering temperature of 450-600 DEG C, carrying out furnace cooling on the obtained product until the obtained product is at room temperature, and taking out the obtained product. According to the invention, the content of a face-centred cubic structure alpha-Co in the alloy is increased, the toughness and the strength are improved, the comprehensive mechanical properties are good, phenomena such as fatigue cracking, breakage and early wear in the process of application are reduced, and the purposes of prolonging the service life, reducing the application cost and increasing the application efficiency are achieved.

The invention discloses a manufacturing method of a hollow ceramic membrane. The hollow ceramic membrane is processed through a hollow ceramic membrane mould. The hollow ceramic membrane is internallyprovided with one or more full-closed hollow holes. The mould comprises an upper shape mould, a lower shape mould and an inner mould core. The manufacturing method specifically comprises the following steps of first-time filling, mold core placing, second-time filling, semi-dry pressing forming, drying, glue discharging and sintering, and a finished hollow ceramic membrane is taken out after natural cooling. Through the manufacturing method, the defects that as for existing hollow ceramic manufacturing, a full-closed hollow ceramic membrane and a small-section hollow ceramic membrane cannot be manufactured, and the adjusting range of the membrane hole diameter is narrow are overcome; and compared with an existing method, the equipment requirement is low, equipment abrasion is little, thetechnique is simple, the efficiency is high, and manufactured hollow ceramic is integrally formed without the bonding step.

A lens barrel includes a plurality of lenses moved between a collapsed state where at least one lens is collapsed and a photographic state where at least one lens is disposed at an object side and all lenses are on a photographic axis, a plurality of lens retaining frames each configured to retain the plurality of lenses, a movable cylinder, a positioning member provided inside the movable cylinder, the retractable lens retaining frame retaining a retractable lens to be positioned to a photographic axis position by allowing the retractable lens retaining frame to abut on the positioning member in the photographic state and to be retracted out of the photographic axis in the collapsed state, a preliminary reception portion provided inside the movable cylinder and located on a path along which the retractable lens retaining frame moves from the collapsed state to the photographic state.

The invention relates to the technical field of agriculture, in particular to an unmanned aerial vehicle pesticide spraying device, and aims to overcome the disadvantages that liquid pesticide in a pesticide kit is not full, and an unmanned aerial vehicle is easy to crash because of inertia dithering, and the disassembling and assembling of the pesticide kit in the unmanned aerial vehicle are complicated. The unmanned aerial vehicle pesticide spraying device comprises an unmanned aerial vehicle body, wherein an accumulator is fixed to the bottom of the unmanned aerial vehicle body through bolts; wiring frames are welded to the periphery of the unmanned aerial vehicle body; and a dual-shaft motor is fixedly mounted at the tail ends of the wiring frames through bolts. According to the unmanned aerial vehicle pesticide spraying device disclosed by the invention, the output end at the bottom of the dual-shaft motor is used as a power source of a peristaltic pump, the liquid pesticide in the pesticide kit is extracted by the peristaltic pump, and the sprinkling effect is realized through a spray nozzle; a buffer spring mounted in each compression fixing frame is used for pushing a corresponding rubber ball at the tail end of a corresponding supporting rod to slide in a corresponding clamping groove formed in the surface of the pesticide kit, so that the functions of buffering and clamping on the medical kit are realized, the situation of crashing caused by inertia dithering of the liquid pesticide in the medical kit is reduced, the disassembling and assembling of the medical kitare very convenient, and the working performance is improved.