1226results about How to "Avoid Leakage" patented technology

The invention discloses a trajectory tracking sliding mode control method for a spraying mobile robot. The method comprises the following steps of: performing mechanism analysis on a mobile robot, and establishing a mobile robot kinematic model with non-integrity constraint; establishing a controlled object mathematical model of each branch controller of a wheeled mobile robot provided with a motor driving shaft disturbance term; identifying a traveling path by utilizing a computer vision system, and determining an expected motion track of each branch driving motor according to the kinematic model deduced in the previous step; detecting the rotating speed of the motor, calculating the actual motion angular velocity and actual motion angular acceleration of left and right driving motors of the mobile robot, and calculating the deviation and deviation derivative between the expected angular velocity and the actual angular velocity of each driving motor; establishing a sliding mode switching function which meets the speed control requirement of the driving motor; determining the sliding mode controller control quantity of the left and right driving motors of the mobile robot on the basis of the sliding mode surface function s; and respectively transmitting the control quantity of the motor of the mobile robot to the left and right driving motors.

The invention provides a grouting device and grouting technique for a tunnel lining vault with a mould. The grouting device comprises a lining concrete pouring template, a grouting pipe, a fixing device, a throttling device, a flow-splitting device, a feeding device and a control device, wherein a mounting hole is formed in the lining concrete pouring template; the grouting pipe penetrates through the mounting hole, and the fixing device is used for fixedly connecting the grouting pipe; one end of the throttling device is communicated with the grouting pipe while the other end is communicated with an output port of the flow-splitting device; the feeding device is communicated with an input port of the flow-splitting device and is used for conveying grouting slurry to the grouting pipe; and the control device is connected with the feeding device and is used for controlling the starting/stopping of the feeding device. According to the invention, the water leakage problem of the secondary lining concrete caused by the waterproof plate being easily broken in the traditional later punching grouting process is solved, and the filled grouting liquid and concrete are formed into a stressed whole body, so that the empty lining and the defect of two-layer skin of the traditional grouting technique are overcome, and the risks in cracking and falling of the lining concrete are reduced.

The invention discloses an electronic cigarette allowing liquid to be injected from the top and a heating assembly to be replaced at the bottom. The electronic cigarette comprises a cigarette holder, a connection assembly, a liquid storage tube and the heating assembly, wherein the cigarette holder, the connection assembly, the liquid storage tube and the heating assembly are sequentially connected from top to bottom. The connection assembly is connected with the cigarette holder and the liquid storage tube, the heating assembly is detachably connected with the lower end of the liquid storage tube, a partition board is disposed in the liquid storage tube and divides an inner cavity of the liquid storage tube into an upper containing cavity and a lower containing cavity, the partition board is provided with a liquid discharge hole, a rotatable atomizing tube is arranged on the upper portion of the partition board, the lower end of the atomizing tube extends to form a block used for plugging the liquid discharge hole in the radial direction, the upper end of the atomizing tube penetrates through the connection assembly and then is inserted into the cigarette holder, an upper end port of the atomizing tube is communicated with the cigarette holder, and a lower end port of the atomizing tube is communicated with a smoke outlet of the heating assembly. According to the electronic cigarette, the electronic cigarette can be filled with the tobacco liquid conveniently and hygienically, heating and atomizing amount of the tobacco liquid can be adjusted through the heating assembly, taste is improved, and the heating assembly can be conveniently replaced according to needs.

The invention relates to a self-illumination display pixel. The self-illumination display pixel comprises a self-illumination circuit; the self-illumination circuit comprises a self-illumination device; the self-illumination display pixel further comprises an optical fingerprint sensing circuit; the optical fingerprint sensing circuit comprises a first TFT device and a photosensitive device; and a channel layer of the first TFT device is just below the photosensitive device. By means of the self-illumination display pixel, a fingerprint sensing function can be realized; and furthermore, the integral structure is optimized.

The invention discloses a method for detecting a database risk, a server and a storage medium. The method comprises the steps of obtaining a target access record of a target user; extracting multipletarget behavior characteristics from the target access record; calculating a target matching degree between each target behavior characteristic and a preset baseline behavior characteristic; determining a target behavior risk level corresponding to the target matching degree through a behavior estimation model, wherein the behavior estimation model is used for reflecting a corresponding relationship between the matching degree and the behavior risk level. Based on the preset baseline behavior characteristic, the method for detecting the database risk can detect external attacks and internal threats, also can detect variable attacks efficiently without updating the database repeatedly and in real time, avoids data leakage caused by risky behavior of internal personnel, can detect threatening access to the database more comprehensively, can protect the database more efficiently, improves the database risk detection efficiency and accuracy and improves the database security.

The invention relates to a massager capable of impacting deep muscular fasciae. The massager comprises a massager body and a massage structure located outside the massager body and is characterized inthat the massager body comprises a shell, a control system, a connecting rod structure and a drive structure are arranged in the shell, the drive structure is connected with the control system and the connecting rod structure, the connecting rod structure is connected with the massage structure and comprises an eccentric drive wheel, a connecting rod and a drive shaft, the connecting rod is a 'Z'-shaped connecting rod with a high end and a low end, the low end of the 'Z'-shaped connecting rod is connected with the drive structure through the eccentric drive wheel, the high end of the 'Z'-shaped connecting rod is connected with the drive shaft, the drive shaft is connected with the massage structure, the drive structure drives the 'Z'-shaped connecting rod to move forwards and backwards ina reciprocating manner through the eccentric drive wheel, and the 'Z'-shaped connecting rod drives the massage structure to move in a reciprocating manner through the drive shaft. The massager is compact in structure, long in service life, low in cost, good in safety performance and the like.

The invention provides an atomizer. An atomizing assembly of the atomizer is arranged in a liquid storage cavity of a liquid storage assembly, the atomizing assembly comprises an atomizing head and a venting assembly, the atomizing head comprises an atomizing head mounting seat arranged at the bottom end, the atomizing head mounting seat is provided with an airflow channel and a liquid inlet channel not communicated with each other, and gas enters the atomizing head from a gap between the mounting seat and a venting pipe and the airflow channel. Therefore, the atomizer is provided with a gas inlet in the upper end of the atomizer, no air inlet is formed in the lower end of the atomizer, inlet air and inlet liquid are separated by the atomizing head mounting seat, so that a condition of liquid leakage is effectively avoided.

The invention belongs to the technical field of computer software and discloses a special operation personnel actual operation examination control method and system. The method comprises the steps ofuploading check data to a server for check in real time; feeding back results in real time, and after the results are fed back completely, carrying out weighting computing to obtain actual operation scores; collecting video data, and analyzing and replaying the video data; synchronizing examination planning data, and uploading examination data in real time; carrying out electronic signing and confirmation on examination results; and storing signing information and examination results to an examination information base. According to the method and the system, working efficiency is improved, specifically, before the system is used, after examinations are finished, examinee videos are edited and processed and then are uploaded, a score of each examinee needs to be manually computed, and timeand labor are wasted, after the method and the system are employed, the scores of the examinees are displayed in real time, the videos are directly uploaded to the server, and taking a class as an example, the time from examination organization to data archiving is averagely reduced by more than 60%.

The invention relates to a novel leaching device and a using method and application thereof. The leaching device comprises a filter with an upward opening and a vacuuming device. The filter comprises a funnel with an upward opening and filter medium, a buoy is optionally arranged, and the vacuuming device comprises a guiding tube, a liquid storing tank and a vacuum system. The leaching device leads solid and liquid to move backwards in a leaching process, solid sediment settles downwards under gravity, the liquid is removed above through pumping, solid matters can be prevented from blocking the filtering medium, accordingly time is saved and filtering efficiency is improved.

The invention discloses a hub reduction gear for engineering machinery. The hub reduction gear comprises a frame, a drive motor, a first-stage planetary mechanism, a second-stage differential mechanism, a third-stage ordinary gear train mechanism, a hub and rims. The first-stage planetary mechanism is positioned on one side, facing to the drive motor, of the third-stage ordinary gear train mechanism. A first-stage gear ring is fixedly connected with a third-stage planetary carrier, two ends of a first-stage planetary carrier are rotationally supported in an inner hole of the third-stage planetary carrier and an inner hole of a front end cover respectively through first bearings, the front end cover is fixed in the third-stage planetary carrier, the second-stage differential mechanism further comprises a second-stage sun gear spindle, one end of the second-stage sun gear spindle is fixedly connected with the first-stage planetary carrier while the other end of the same penetrates an inner hole of a third-stage sun gear to be connected with a second-stage sun gear, a sealing pipe is connectedly mounted on the front end cover and sleeves the periphery of a spline housing, and a sealing ring is arranged between the sealing pipe and a body of the drive motor. The hub reduction gear is compact and reasonable in structure and reliable in sealing.

The invention provides an intelligent video monitoring method, device and system. The method comprises the following steps: collecting video data in real time; identifying the face of a monitored object in video data to discriminate whether a monitored object in the video data is matched with pre-saved face characteristics of the first type of users or not; saving the video data to the local sideand not uploading if matched, otherwise, discriminating whether the monitored object in the video data is matched with pre-saved face characteristics of the second type of user or not; fuzzing the face characteristic region of the monitored object in the video data and uploading the processed video data via network if the monitored object is matched with the pre-saved face characteristics of the second type of users, otherwise transmitting a first warning message to a preset terminal and uploading the video data via the network. According to the intelligent video monitoring method, device andsystem, stage processing of intelligent video monitoring can be realized based on face identification, the privacy of video monitoring can be protected and security of video data is improved.

The invention discloses an improved hydrogen gas production reactor, comprising a reactor body, wherein two symmetrical air outlets are formed in the side wall at the top end of the reactor body, a heating plate is arranged on each of the bottom end and the side wall at the bottom end of the reactor body, a discharge opening is formed in the center of the bottom end of the reactor body, the discharge opening penetrates through the heating plate to be communicated with the inside of the reactor body, four uniformly distributed protruding plates are arranged on the side wall of the reactor bodyin a welding manner, vertically arranged supporting columns are arranged at the bottom ends of the protruding plates in the welding manner, an exhaust fan is fixedly arranged at the top end of one protruding plate by a bolt, the exhaust opening of the exhaust fan extends to the inside of the reactor body, and a second driving motor is fixedly arranged at the top end of the other protruding plate by a bolt. The reactor has the advantages of being simple in structure, reasonable in design, free of leakage of hydrogen gas during adding of a catalyst, and simultaneously is capable of preventing impurities in the hydrogen gas from blocking a pipeline and high in hydrogen gas collecting rate.

The invention provides a heat pump air conditioner and a control method thereof. The heat pump air conditioner comprises a refrigerant circulation loop and an indoor heat exchanger (27); the refrigerant circulation loop consists of a compressor (23), an intermediate condenser (24), an intermediate evaporator (26) and a throttling device (25); the indoor heat exchanger (27) capable of achieving refrigeration or heating in a room can exchange heat with the intermediate evaporator (26) or the intermediate condenser (24) through a water circulation loop in which water flows. The heat pump air conditioner can effectively prevent refrigerant leakage caused by the connection of a refrigerant pipeline into the room and effectively avoid harm caused to people in vehicles or indoors, and the use safety and reliability of the heat pump air conditioner are improved. As the water circulation loop is adopted for heat exchange with air, valve parts, including electromagnetic valves, reversing valvesand the like which are resistant to high pressure, high temperature and corrosion are effectively reduced, the development cost is greatly reduced, the fault probability is effectively decreased, andrunning is safer and more reliable.

The invention relates to a fire extinguishing technology and discloses a fire extinguishing agent filling device. The fire extinguishing agent filling device is characterized by comprising a valve core, a valve body provided with a stepped through hole, a connecting rod provided with a central runner, a connecting cap and a connector, wherein the stepped through holes are respectively formed in the connecting cap and the connector; a small taper which is sealed and matched with a small hole of the stepped hole of the valve body is arranged at the front end of the valve core; a large cylinder body which is in threaded connection with a large hole of the stepped hole of the valve body is arranged at the rear end of the valve core; a longitudinal blind hole is formed in the center of the large cylinder body; a transverse hole communicated with the bottom of the longitudinal blind hole is formed in the connected part of the small taper and the large cylinder body; the connecting rod penetrates through the connecting cap; the valve body is in threaded connection with the large hole of the stepped through hole of the connecting cap; one end of the connecting rod is arranged in the longitudinal blind hole of the large cylinder body; the other end of the connecting rod is in threaded connection with the large hole of the stepped through hole of the connector. According to the fire extinguishing agent filling device disclosed by the invention, a filling system in which the connecting rod is matched with the hole of the valve core is designed, and thus the simplicity and convenience in operation are realized; after filling, a filling valve is separated from a tool for filling a fire extinguishing agent, and thus the condition that the fire extinguishing agent leaks due to mistaken operation of personnel is avoided.

The invention provides an anti-counterfeiting two-dimensional code and a generating, and a generation and detection identification method thereof. The anti-counterfeiting two-dimensional code is a two-dimensional code graph composed of a position detection graph and a coding area, the position detection graph is provided with four positioning marks, and one of the four positioning marks is a mainpositioning mark; coding region being circular, the coding area is located in the center of the whole two-dimensional code graph; wherein the coding region contains binary data information; wherein the binary data information comprises a data code, an error correction code, a mask and a random code; according to the method, through adding the random code information, the mask acts on the data code, the error correction code and the random code at the same time, the same character generates different coding area graphs, leakage of a data storage structure is prevented, meanwhile, in the detection and recognition process of the two-dimensional code, interference of noise, rotation, light reflection and the background can be effectively avoided, and the detection and recognition precision ofthe two-dimensional code is improved.

The invention relates to a fingerprint-identification-based cloud storage method, which comprises the following steps that terminal equipment acquires a fingerprint feature of a user, and transmits the fingerprint feature and a user account to a cloud server for fingerprint identification and logging in the cloud server; the terminal equipment calls a digital certificate to perform signature encryption on a file to be cloud-stored in a storage space, and transmits the file to the cloud server; the cloud server receives the signed file, and classifies and stores the file. According to the technical scheme, the user is identified by virtue of a fingerprint, and the digital certificate is used for the signature encryption of the stored file, so that the safety, the privacy and the reliability of a cloud storage system are comprehensively improved.