70results about How to "Avoid" patented technology

Disclosed is a dynamic obstacle avoidance control method based on a laser radar. The laser radar acquires surrounding environment information of a mobile robot in real time, and the laser radar data records the distance of an obstacle met by the laser radar in each direction within a period of time. An obstacle avoidance controller judges whether the obstacle is in a security area of the robot byusing the data of the laser radar. If the mobile robot detects an obstacle, the direction of the obstacle relative to the mobile robot is calculated first via the laser radar data, and then the obstacle avoidance controller calculates the control output quantity of the mobile robot to control the robot to avoid the obstacle. If the mobile robot does not detect an obstacle, a motion controller is used, so that the robot can arrive at a target point. The mobile robot can quickly detect the direction of the obstacle, and the mobile robot generates a smooth and continuous locus by switching the obstacle avoidance controller and the motion controller and constraining the linear acceleration and angular acceleration of the robot.

An automatic installation method for a Linux operating system is characterized in that a new operating system is created in a first Linux operating system in a memory. The automatic installation method comprises the steps as follows: uncompressing a first start-up file and mapping the file to be a file system in the memory; collecting peripheral information in the first Linux operating system and packing the information into an installation script; receiving installation requirements of the operating system, selecting a second Linux operating system from an installation source and extracting an inner core and a second start-up file from the second Linux operating system; adding the automatic installation script to the second start-up file after uncompressing the second start-up file so as to generate a third start-up file; invoking an inner core executive program of the first Linux operating system and operating a second inner core and the third start-up file; and installing the second Linux operating system in a target hard disk automatically through the automatic installation script of the third start-up file.

The invention provides a deep reinforcement learning reward function optimization method for an unmanned ship path planning. The method comprises the steps of S1, obtaining environmental information;s2, obtaining the distance between the unmanned ship and the obstacle and the distance between the unmanned ship and the target point; s3, giving a corresponding reward value according to the number of times that the ship arrives at the target point; s4, judging whether the ship is in a reward domain or not, and giving a corresponding reward according to a reward domain reward principle; s5, judging whether the unmanned ship collides with the obstacle or not, and giving a corresponding punishment value; s6, judging whether the ship is in the dangerous area or not, giving a corresponding punishment according to a dangerous area punishment principle, and otherwise, giving a reward according to a general situation reward principle. According to the method, the obtained rewards or punishmentsare increased or decreased by adding the reward domain near the target point of ship navigation, adding the danger domain near the obstacle and introducing the counting principle, the convergence speed of the deep reinforcement learning algorithm is increased, and the ship is instructed to avoid the obstacle more quickly to reach the target point.

The invention discloses a chill coating for casting, which is composed of graphite powder, sodium bentonite, iron oxide red, silicon iron powder, colophony and ethyl alcohol. Amorphous graphite powder is combined with flaky-shaped graphite powder in usage. The chill coating for the casting can effectively prevent chill from appearing at chill portions and improve casting quality.

The invention discloses an old-age care intelligent alarm system based on a human body fall detection technology. The system comprises a GPS positioning module, a body motion state data acquisition module, a life sign acquisition module, a central processor, a voice alarm module, a database, a data packing uploading module and a monitoring terminal. According to the invention, real-time acquisition and evaluation of user ECG data and body temperature are realized, then real-time data transmission is realized through a Beidou module, and while the equipment cost is decreased, the monitoring scope is enlarged; and at the same time, through arrangement of the voice alarm module, the phenomenon of whether to off a favor or not is greatly avoided, all the data is traceable, at the same time, through design of a motion state detection module, after it is discovered that a patient falls yet nobody offers help or the patient cannot get up by himself, medical care personnel or family members can be timely dispatched according to positioning information, the system has a multiple call function itself, and the patient can obtain timely help.

The invention relates to an air deflecting structure for cooling air of a vehicle transmission case. The transmission case is provided with a case body, a cover body and a belt speed changing mechanism, wherein a driving disc set and a driven disc set are arranged on the belt speed changing mechanism; a driving belt is arranged between the driving disc set and the driven disc set; a cooling air inlet is formed in the cover body; an air deflecting hood covers the outer side of the cover body and is at least provided with an air deflecting opening; the air deflecting opening penetrates through the air deflecting hood. The air deflecting structure is characterized in that a current guiding element is convexly arranged near to the air deflecting opening, on the inner side of the air deflecting hood; a covering rib is arranged above the air deflecting opening, on the inner side of the air deflecting hood; the current guiding element and the covering rib form an air guiding opening communicated with the air deflecting opening, on the inner side of the air deflecting hood; a drainage rib corresponding to the current guiding opening is arranged on the inner side of the air deflecting hood; a water draining groove is formed in the lower end of the drainage rib, so that the quantity, entering the transmission case, of water can be effectively reduced, and further the belt speed changing mechanism arranged in the transmission case is enabled to normally work, and the use efficiency of the belt speed changing mechanism of the transmission case can be improved.

The invention discloses a precision seeding and compaction compound working machine for rape. The precision seeding and compaction compound working machine comprises a rubber caterpillar chassis, a rotary tillage and soil breaking device, a seed arrangement device and a compaction device. According to the precision seeding and compaction compound working machine, the rotary tillage, the soil breakage, the land wheel driven seed arrangement and the land wheel compaction are integrated; the precision hill seeding plantation can be carried out while the rotary tillage work is carried out; afterward, the compaction is carried out through a land wheel; in comparison with a conventional working machine tool, the plantation uniformity can be improved; one to two rape seeds are planted in each hole; the working efficiency is increased by three times; the land compaction for two times by a tractor is reduced; the hardening degree of soil can be avoided; the working cost is decreased by 50 percent; the yield of a rape crop can be improved; and the land tilling benefit of a peasant is increased.

The invention relates to a papermaking fiber image measuring method. The instrument adopted in the method is a papermaking fiber analyzer consisting of a biological microscope of which the ocular lens is replaced by a digital video, a microcomputer, a display connected with the microcomputer, and a papermaking fiber analyzing program arranged inside the microcomputer. The measurement item comprises image method measurement of length and width of the papermaking fiber, image method measurement of papermaking fiber ratio and measurement of papermaking fiber plant material cell wall and cavity ratio. The invention provides filmmaking technology by a gel process, and a glass slide clamp capable of accommodating large-scale glass slides. The papermaking fiber image measuring method has the advantages of simpleness, practicability and accurate result.

The invention relates to the technical field of dental orthodontics, and specifically discloses an invisible appliance production method. The invisible appliance production method comprises the following steps of: providing a diaphragm for making an invisible appliance; arranging a layer of process film on the outer surface of the diaphragm; placing the diaphragm and one surface opposite to the outer surface provided with the process film on a dental model for film pressing to obtain the invisible appliance to be cut; performing laser cutting on the invisible appliance to be cut along a predetermined cutting path, wherein laser is incident from one side of the process film, the laser cuts through the process film and the diaphragm simultaneously, and the diaphragm and the process film arenot mixed at the cutting path; and removing the process film to obtain the invisible appliance. The invisible appliance production method solves the adverse effect on the quality of the appliance caused by smoke dust generated in the laser cutting process of the existing invisible appliance production.

The invention discloses a method for preparing a flexible Cu-In-Ga-Se (CIGS) thin film solar cell. The method is characterized by comprising the following steps: step 1, preparing a CIGS light absorption layer on a soda glass substrate by adoption of a high-temperature coevaporation process; step 2, pasting a temporary supporting layer; step 3, removing the soda glass substrate; step 4, bonding a flexible substrate; step 5, removing the temporary supporting layer, wherein the step 5 particularly comprises the following steps: firstly, adopting limonene to dissolve paraffin on the surface of the CIGS light absorption layer, removing the temporary supporting substrate and paraffin, cleaning with deionized water and blow-drying with nitrogen; after that, preparing a CdS buffer layer with the deposition thickness of 50-80 nm by adoption of a chemical water bath method; adopting a magnetron sputtering process on the buffer layer to obtain an intrinsic zinc oxide thin film with the deposition thickness of 50 nm and an ITO thin film with the deposition thickness of 300-800 nm, and preparing a 3 [mu]m aluminium electrode on the ITO thin film by adoption of an electron beam evaporation process to finish preparation of a cell device.

The invention relates to a receptacle connector comprising a USB plug with a Micro-USB specification and without increasing insertion length and capable of being connected even with an expanding plugt on a plug terminal. Space that does not interfere with an engagement protrusion of a first plug connector is maintained at the top of the interior of a chassis that attaches the receptacle connector, and so the inner peak surface of a fitting cylinder sandwiched by a pair of engagement receiving sections is formed curving upwards and a second plug connector disposed with the addition of a plurality of third plug terminals above a second plug terminal can be inserted. When the first plug connector is inserted, a first plug terminal contacts a first contact exposed at the bottom surface of a support plate, and when the second plug connector is inserted, the second plug terminal and third plug terminals contact the first contact and a second contact.

The present application discloses a backoff method, apparatus, device, system and storage medium during a transmission process, and relates to the technical field of communication. The method includes: a sending device performs LBT on an unlicensed frequency band; the sending device sends RTS to a receiving device when the LBT succeeds, the RTS including a first backoff period; the sending devicesends C-CTS to the receiving device after receiving CTS sent by the receiving device, the C-CTS including a second backoff period. According to the technical scheme, other devices monitoring the surrounding are periodically backed off according to the first backoff period and the second backoff period, and are required to be backed off according to the first backoff period when the CTS fails to besent, thereby solving the over-protection problem that in the related technology, after the receiving device CTS fails to be sent, other devices around the sending device still perform long-term backoff according to the NAV of the monitored RTS.

The invention discloses a fire door core board, a preparation method and application thereof. The fire door core board comprises a fire door core layer and a glass fireproof coating combined on the surface of the fire door core layer. Specifically, the fire door core layer includes magnesium oxide, magnesium chloride, attapulgite and a composite foaming agent in a mass ratio of (30-45):(15-35):(5-15):(0.1-0.5), and the thickness of the glass fireproof coating is 5-50micrometers. The fire door core board provided by the invention has high bending strength, stable structure and good fireproof performance. The preparation method effectively ensures the performance stability of the fire door core board provided by the invention, and improves the fireproof performance.

The invention discloses a round baler floating type pickup device comprising two front supporting wheel assemblies, a pickup rack, a pair of augers, a quick detaching guiding mechanism, a pickup rolling cylinder, a plurality of protection ring assemblies, a plurality of elastic claw assemblies and a floating grass baffle plate. The floating grass baffle plate is arranged on the back side of the pickup rack and comprises connection plates arranged on two ends and a middle curved transverse plate; the upper part of the curved transverse plate is bend into a hook shape and the lower part is bent to a waterdrop-shaped sealed curved surface with fairing transition; the upper ends of the connection plates are respectively hinged with side plates on two longitudinal ends of the pickup rack; spacing columns are respectively fixed on the side plates of the pickup rack outside two sides of the middles of the connection plates; and the floating grass baffle plate block front-cast grass, so the baffle plate can only work according to rotation of the pickup rolling cylinder, and work efficiency can be improved.

The invention relates to the technical field of electrical equipment, and particularly relates to a dustproof ventilation type power electrical equipment cabinet. The power electrical equipment cabinet comprises a shell, wherein a cavity is formed in the shell, rectangular through grooves are formed in the left side and the right side of the shell, inserting grooves are formed in the rectangular through grooves, the inserting groove is internally provided with a dust screen and a fixing plug, a circular groove is formed in the top of the cavity, and filter screens are arranged at the upper endand the lower end in the circular groove; and a motor and fan blades are arranged between the two filter screens. According to the invention, the dust screens, the filter screens, the motor and the fan blades are arranged, an output shaft of the motor drives the fan blades to rotate, external air passes through the filter screens to filter out dust and is then blown into the cavity by means of rotation of the fan blades, when air pressure in the cavity is too high, air overflows to the outside from the dust screen, it is guaranteed that the air in the cavity flows, and if dust falls on an electric appliance wire in the cavity, the dust can also be blown out of the dust screen by the air blown in by the fan blades, so that air circulation in the cavity is guaranteed, moisture is prevented,and dust falling is avoided.

The invention discloses a cooling and warm blowing integrated bath heater based on air drainage. The bath heater comprises a top plate and a shell cover, an inner cavity of the shell cover is dividedinto a left cavity and a right cavity through an illumination box, an air suction cavity and an air outlet cavity are formed in the left side and the right side of the bottom end of the top plate correspondingly, and a first shutter is arranged at an opening in the bottom end of the air suction cavity; and a second shutter is arranged at an opening in the bottom end of the air outlet cavity, a purifying barrel is embedded in the side wall of the left cavity, the air outlet end of the purifying barrel is connected with the illumination box through a fourth air pipe in a penetrating manner, theair inlet end of the purifying barrel is connected with the air suction cavity through a first air pipe in a penetrating manner, an air suction pump is installed on the first air pipe, and the bottomwall of the right cavity is fixedly connected with an electric heating barrel. By means of the cooling and warm blowing integrated bath heater, the air purification function, the heat dissipation function of an LED lamp and the warm blowing function are communicated and staggered together through the whole device and can operate independently, the number of components of the whole device is greatly reduced, the size and weight of the whole device can be reduced, and ceiling installation of the whole device is facilitated.

The foundation pit support structure comprises two symmetrical supporting columns fixedly connected to the inner wall of the bottom of a foundation pit, support plates are arranged on the inner walls of the sides, away from each other, of the foundation pit, a transverse rod is fixedly connected to the tops of the supporting columns through bolts, and a driving motor is fixedly connected to the top of the transverse rod; a first bevel gear fixedly sleeves the outer wall of the rotating shaft in the transverse rod, an output shaft of the driving motor extends into the transverse rod and is fixedly connected with the top end of the rotating shaft, two first enclosure assemblies used for enclosing a foundation pit are arranged in the transverse rod, a rectangular through hole is formed in the top end of the supporting column, and a circular ring is fixedly embedded in the inner wall of the bottom of the transverse rod; the bottom end of the rotating shaft rotationally penetrates through the circular ring and is fixedly connected with a straight gear, and two second enclosure assemblies used for enclosing the foundation pit are arranged at the bottom of the transverse rod. The problems that in the prior art, an enclosure structure is poor in recoverability, supporting cannot be conducted according to deformation of a foundation pit, and the deformation degree of the foundation pit cannot be monitored in real time are solved.

The invention discloses a milk delivery pipe switching device of a milk foam device. The milk delivery pipe switching device comprises a milk delivery pipe which is composed of a milk feeding sectioncommunicating with a milk storage tank and a milk discharging section communicating with the milk foam device, a switching body is arranged between the milk feeding section and the milk discharging section, and an air pipe is connected to the switching body. When the switching body is under a milk delivery state, the milk feeding section and the milk discharging section communicate with each other. When the switching body is under a milk returning state, the milk feeding section and the air pipe communicate with each other. According to the milk delivery pipe switching device of the milk foamdevice, residual milk in the milk delivery pipe can flow back into the milk storage tank.

The invention relates to a full-automatic oil analysis high-performance liquid separation apparatus. The full-automatic oil analysis high-performance liquid separation apparatus comprises a base, liquid separation bottles, a snap-in apparatus, a liquid outlet pipe and a movable plate, wherein a storage frame and the snap-in apparatus are installed inside the base, the inner sides of the storage frame and the snap-in apparatus are respectively provided with the liquid separation bottle, the top end of a supporting leg is connected with the storage frame, the outer side of the storage frame is provided with a micro vibrator, and the inner side of the storage frame is provided with an inner protection mat; a first liquid inlet pipe is arranged inside a conduit plug in a penetrating manner, asecond liquid inlet pipe is arranged inside the conduit plug adjacent to the first liquid inlet pipe in a penetrating manner, one end of the snap-in apparatus is fixed to on the inner wall of the base, the liquid outlet pipe is arranged on the bottom of the liquid separation bottle, and the outer side of the liquid outlet pipe is provided with an electromagnetic valve; and the movable plate is arranged inside the base. According to the full-automatic oil analysis high-performance liquid separation apparatus, the storage frame on the outer side of the liquid separation bottle is provided with the micro vibrator, and the outer micro vibrator can enable micro bubbles to float upwardly, so that the wall hanging of the bubbles can be avoided, and the separation efficiency can be improved.

The invention provides a vehicle-mounted electronic tag. The vehicle-mounted electronic tag comprises a shell, a circuit board and a charging card, the front end of the shell is concave inwards to form a plug-in aisle, and the charging card is inserted in the plug-in aisle; the circuit board is attached to the shell, and the circuit board is arranged in parallel with the charging card; a process tank is arranged on the shell between the charging card and the circuit board, and the process groove runs through the plug-in aisle; the side wall of the process tank is provided with a stop block, and the stop block is used for preventing the charging card from entering into the process tank; during the cut in of the charging card to the card plug-in aisle, the stop block is abutted against the side surface of the charging card towards the circuit board, so as to prevent the charging card from entering into the process tank, and further, the charging card is prevented from being pushed against the side wall of the process tank, and the card is relatively smooth.

The invention discloses a chiller coating for a casting. The chiller coating is composed of graphite powder, sodium bentonite, ferric oxide powder, ferrosilicon powder, rosin and ethyl alcohol. Amorphous graphite powder and flaky graphite powder are used in combination. According to the chiller coating, white cast of a chiller part can be effectively avoided, and the quality of the casting is improved.

The invention discloses a multifunctional mobile treatment vehicle for digestive endoscopy nursing, which is characterized by comprising a main body structure, a movement limiting structure and an auxiliary side structure, the movement limiting structure is detachably arranged on the main body structure, and the auxiliary side structure is detachably arranged on the main body structure and located above the movement limiting structure. The multifunctional mobile treatment vehicle relates to the technical field of nursing equipment, by bearing the nursing equipment, a patient can be clinically monitored and examined, and oxygen therapy can be conducted on the patient in danger; meanwhile, the multifunctional mobile treatment vehicle can be connected with a bed body to prevent movement by virtue of a movement limiting structure, and the patient is assisted to lie on the side by virtue of a side assisting structure; the multifunctional mobile treatment vehicle is simple in overall structure and low in cost, can be conveniently operated and regulated according to the height of the bed body, can be prevented from being stressed to move, can assist a patient in lying on the side, prevents an internal wound from being in contact with food, can bear various devices, is used for nursing and monitoring the patient, improves the comfort level of the patient, and protects the life of the patient.

The invention provides an elevator door plate, and belongs to the mechanical technical field. The elevator door plate solves the problem that an existing elevator door is short in service life. The elevator door plate comprises a long plate shaped body; one end of the body is equipped with an L-shaped step; a fireproof expanding and sealing strip is arranged in the step; the fireproof expanding and sealing strip is L-shaped and is parallel to the step; the fireproof expanding and sealing strip comprises a connecting part I which is horizontally arranged and a connecting part II which is vertically arranged; protruding buckles are arranged on each of the inner side surface of the connecting part I and the inner side surface of the connecting part II; the buckles are in the shape of long strip, and are arranged in the width direction of the body; blocking slots matched with the buckles are correspondingly formed in two step surfaces of the step; the buckles are embedded into the buckles; the inner side surface of the connecting part I and the inner side surface of the connecting part II tightly abut against the corresponding step surfaces separately; and protruding long-strip shaped sealing parts which are arranged in the width direction of the body is further arranged on the outer side surface of the connecting part I. The elevator door plate has the advantage of being long in service life.

The invention provides a chip design optimization system and method based on a dynamic unbalanced clock. In a designed synthesis stage, a designed time sequence path is analyzed, clock delay of a time sequence unit is analyzed and dynamically adjusted according to a current time sequence result, and a clock delay result is transmitted to subsequent steps of a chip design implementation process, so that an unbalanced clock tree structure is synthesized according to requirements during clock tree synthesis. The delay of the whole leaf node clock network is dynamically adjusted in the synthesis and layout wiring stage in the chip design implementation process, so that the purpose of quickly converging the time sequence is achieved. Due to the fact that the dynamic unbalanced clock network is used, the time sequence path of chip design has more time sequence allowance, a chip implementation tool can better optimize the whole designed time sequence, the path with tense time sequence does not need more complex optimization, and therefore the area of the whole design is reduced, power consumption is reduced, and cost is reduced. The achievable clock speed of the design is improved, and the design performance is improved.

Disclosed is a dynamic obstacle avoidance control method based on a laser radar. The laser radar acquires surrounding environment information of a mobile robot in real time, and the laser radar data records the distance of an obstacle met by the laser radar in each direction within a period of time. An obstacle avoidance controller judges whether the obstacle is in a security area of the robot byusing the data of the laser radar. If the mobile robot detects an obstacle, the direction of the obstacle relative to the mobile robot is calculated first via the laser radar data, and then the obstacle avoidance controller calculates the control output quantity of the mobile robot to control the robot to avoid the obstacle. If the mobile robot does not detect an obstacle, a motion controller is used, so that the robot can arrive at a target point. The mobile robot can quickly detect the direction of the obstacle, and the mobile robot generates a smooth and continuous locus by switching the obstacle avoidance controller and the motion controller and constraining the linear acceleration and angular acceleration of the robot.