861results about How to "Achieve full coverage" patented technology

The invention discloses a vehicle-mounted child leaving reminding device and a vehicle-mounted child leaving detection method. The device comprises a voice sensor, a touch sensor, a main control module, a voice alarm, a communication module and a data storage module, wherein the voice sensor and the touch sensor are connected with the signal input end of the main control module; the voice alarm and the communication module are connected with the signal output end of the main control module; the data storage module is connected with the main control module; after an automobile is power off andan automobile door is closed through detection, the voice sensor and the touch sensor are started and respectively perform detection in voice and touch modes; when at least one detection result indicates that a child is left in the automobile, the automobile sends alarm voice and sends information to a specified mobile phone; and an initial state is returned when the automobile door is opened through detection. By the vehicle-mounted child leaving reminding device and the vehicle-mounted child leaving detection method, people around the automobile and specific related personnel can be effectively reminded when the child is left in the automobile.

The invention relates to an AP (access point) transmitting power optimization method based on energy conservation and interference avoidance in a green WLAN (wireless local area network). The AP transmitting power optimization method is used for solving the problems of energy waste caused by the dense deployment of APs and the superposition of coverage areas, and the influence of common-frequency components on the communication quality in the WLAN. The AP transmitting power optimization method comprises the following steps of: determining the number of the APs required to be used for realizing WLAN full coverage according to the WLAN and the coverage range of a single AP with default transmitting power; clustering the APs with the dense deployment in the WLAN by adopting a fuzzy K-mean clustering method or a neural network method or other methods; selectively closing the majority of APs according to a clustering result, realizing WLAN wireless signal full coverage by the remainder minority of the APs, and forming an AP distribution structure simultaneously, namely, initializing an AP transmitting power optimization algorithm; repeatedly calculating the repeated coverage degree of each AP coverage area, and arraying the coverage areas; and controlling the AP transmitting power to reduce the coverage radius of each AP, so as to realize the purposes of energy conservation and interference avoidance of the APs.

The invention relates to a method for preparing a high-nickel long-cycle single-crystal nickel-cobalt-manganese (NCM) lithium ion battery positive-pole material. The preparation method comprises the following steps: (1) mixing a soluble nickel salt, a cobalt salt, a manganese salt, an alkali metal hydroxide and ammonia water, and enabling the mixture to flow into a reaction kettle for constant-temperature coprecipitation to obtain a high-nickel NCM ternary precursor material; (2) uniformly mixing the high-nickel NCM ternary precursor, lithium hydroxide and an additive A in a wet high-speed mixing mode, carrying out drying, then carrying out primary sintering in an oxygen-enriched atmosphere to obtain a spherical high-nickel NCM ternary positive-pole material; (3) carrying out crushing, smashing and sieving to obtain a high-nickel NCM ternary positive-pole material; and (4) carrying out wet mixing and drying on the high-nickel NCM ternary positive-pole material with a coating agent B, carrying out secondary sintering in an oxygen-enriched atmosphere, and carrying out crushing, smashing and sieving to obtain the high-nickel single-crystal NCM lithium ion battery positive-pole material. The positive-pole material prepared by the method has the advantages of high capacity, good cycle performance, high compaction density and the like.

The embodiment of the disclosure provides a security management system comprising an information processing cloud platform and at least one mobile terminal connected to the information processing cloud platform. The mobile terminal is used for sending scene description parameters to the information processing cloud platform, wherein the scene description parameters include a scene parameter, an equipment security parameter, and a user parameter corresponding to the mobile terminal. The information processing cloud platform is used for receiving the scene description parameters sent by the mobile terminal, determining the scene in which the mobile terminal is located and a corresponding security management process based on the scene parameter, evaluating safety states of equipment and/or the staff in the scene in which the mobile terminal is located according to the equipment security parameter and the scene parameter, determining a correlation degree between a user corresponding to themobile terminal and the scene in which the mobile terminal is located based on the user parameter, classifying the user corresponding to the mobile terminal into a work group of the scene in which the mobile terminal is located when the correlation degree is larger than a preset threshold, and sending the security management process to all mobile terminals of the work group.

The invention provides an autonomous planning method for a nuclear radiation detection path of a mobile robot in an unfamiliar indoor scene, which is applied to the mobile robot. A speedometer, an acceleration sensor, a laser ranging radar, a camera, a radiation detector and a computer are carried on the mobile robot; and the speedometer, the acceleration sensor, the laser ranging radar, the camera and the radiation detector are electrically connected or in communication connection with the computer respectively. The autonomous planning method for the nuclear radiation detection path comprises: S01, obtaining an environmental map; S02, generating a global path planning; and S03, correcting the global path planning through local path planning.

The invention discloses a directional diagram reconfigurable antenna and a phased array thereof, and belongs to the technical field of a microwave antenna. The directional diagram reconfigurable antenna is proposed based on slotted fan-shaped patches; through reconfiguration of a feeding network, radiation directional diagrams of four kinds of modes can be realized, and wave beam scanning on the azimuth plane is realized; by performing reasonable arraying through the directional diagram reconfigurable antenna, one-dimensional and two-dimensional large-angle wave beam scanning of the directional diagram on the pitching plane can be realized. The directional diagram reconfigurable antenna is simple and creative in structure, convenient to array, and can be widely applied to the fields of mobile communication, satellite communication, radar and the like.

The invention discloses a radio frequency power amplifier, comprising a radio frequency amplification path, the radio frequency amplification path includes a multi-stage amplifying circuit, the multi-stage amplifying circuit includes at least one driving stage amplifier and at least one differential output stage amplifier, the output terminal of the driving stage amplifying circuit The differential output stage amplifier is connected through the interstage matching circuit, and the output terminal of the differential output stage amplifier is connected with the output matching circuit; wherein, the interstage matching circuit includes an interstage broadband balun or an interstage broadband balun impedance converter for The conversion of the radio frequency signal from unbalanced to balanced is realized, and the output matching circuit includes an output broadband balun impedance converter, which is used to convert the differential radio frequency signal into a single-ended radio frequency signal, and is coupled with the output gating circuit. The radio frequency power amplifier can realize 2G/3G/4G multi-band coverage with only one radio frequency amplification channel, which simplifies the architecture of the multi-mode multi-frequency radio frequency front-end chip and reduces the cost.

The invention discloses an intelligent disinfection and epidemic prevention robot which comprises a robot body, wherein the robot body comprises a wheel-type moving platform module, a disinfectant storage box module, a disinfection module and a sensing and control system; the wheel type moving platform module is used for position movement; the disinfectant storage box module is used for storing adisinfectant; the disinfection module comprises an ultrasonic wave spraying unit, a sprinkling unit, an air filtering unit and an ultraviolet ray disinfection unit; the ultrasonic wave spraying unit is used for performing dry fog spraying disinfection of the disinfectant; the sprinkling unit is used for performing wet sprinkling disinfection of the disinfectant; the air filtering unit is used forperforming filtration disinfection on environment air; and the ultraviolet ray disinfection unit is used for performing ultraviolet ray disinfection on the environment; and the sensing and control system is used for sensing the environment and sending control instructions. According to the embodiment of the invention, the intelligent disinfection and epidemic prevention robot provides options andcombination of a plurality of disinfection modes by aiming at the characteristics of novel coronaviruses, and can effectively block the spreading of the novel coronaviruses.

The invention discloses an interferometer system based secondary surveillance radar response signal direction-finding method, which relates to the technical field of radio monitoring. The method comprises the following steps that: a 4-array-element direction-finding antenna array with a receiving sidelobe suppression antenna unit receives secondary radar response signals, and four receiving channels respectively carry out digital measuring on frequency, amplitude and phase parameters; then, an operation of controlling the receiving sidelobe suppression of an instantaneous direction-finding range and an operation of exhaustion based long-short baseline resolving phase ambiguity are performed; and finally, the orientation resolving is completed through phase orientation mapping. A secondary radar response signal direction-finding system using the method disclosed by the invention has the advantages of high direction-finding precision, rapid direction-finding speed, large instantaneous direction-finding range, low power consumption, low cost, capability of carrying out passive direction-finding, and the like, and has a good application prospect and economic benefits in promoting the air surveillance range in the field of air management and monitoring.

The invention discloses a method for preparing a nanometer material@metal organic framework material. The method comprises the following steps: subjecting a nanometer material to pre impregnating and depositing on the surface of a metal organic complex, carrying out centrifugal separation so as to obtain a composite material containing the nanometer material, and subjecting the composite material to a reaction in a mixed solvent of an organic solvent or an organic solvent and water so as to obtain the nanometer material@metal organic framework material. Compared with a permeation method, the method provided by the invention can realize complete coating of the nanometer material, and achieves a better packaging effect. Compared to an in-situ growth method, the method can broaden the application scope of metal organic frameworks (MOFs) in the nanometer material@metal organic framework material, and realizes effective coating of carboxylic acid metal organic frameworks (MOFs) on the nanometer material.

The invention provides a weak supervision remote sensing target detection method based on hybrid hole convolution. According to the method, various customized designs such as hybrid hole convolution,attention mechanism and multi-layer pooling are adopted, multi-scale feature extraction and fusion are enhanced, and the robustness of objects of different sizes is improved. Besides, asynchronous iteration alternate training between a strong supervision detector and a weak supervision detector is utilized, training and detection can be carried out only through an image-level real label, and the purpose of cooperatively improving the detection performance is achieved.

The invention discloses a flexible array type eddy current sensor with a circular periodic structure. The flexible array type eddy current sensor comprises four layers of structures, wherein the top layer and the bottom layer are excitation coils, and the two middle layers are detection coil arrays; the excitation coils are periodically circular closed-loop coils formed by routing upper and lower staggered semicircular periodic coils; the detection coil arrays comprise a plurality of detection coils; the detection coils adopt double-layer spiral structures; the upper layer of the detection coils and the lower layer of the detection coils are conducted through penetrating holes; the spiral winding directions of the upper layer of the detection coils and the lower layer of the detection coils are opposite. The flexible array type eddy current sensor with the circular periodic structure has the advantages of simple structure, convenience in manufacturing, high space resolution, full coverage (no scanning dead corner), high output signal, high tiny defect detection capacity, high detection efficiency and the like.

The invention discloses a network detection method, and a network failure detection method and system. The network detection method is suitable to be executed in a network server; and the network server has a communication connection with one or multiple aggregator servers and accesses multiple internet data centers. The network detection method comprises the steps of: acquiring network topological information which contains series numbers and connection relationships of each host, each exchanger and each internet data center; generating a network detection list corresponding to each host according to the network topological information; responding to a list updating request sent by a data probe, sending the network detection list corresponding to the host related to the data probe to thedata probe, so as to indicate the data probe to detect the network state by a presetting first interval and send the detection result to the network server; and receiving detection results reported byeach data probe, forming each detection result into corresponding index data and sending the index data to the corresponding aggregator server.

The invention discloses a nuclear power plant pipeline leakage detection device and method based on distributed optical fiber temperature measurement. The nuclear power plant pipeline leakage detection device comprises a detection sensor unit, a signal receiving and transmitting processing unit and a data analysis and alarm unit. The detection sensor unit comprises an optical fiber and a fastening support, wherein the optical fiber is fixed to the portion above a high-energy pipeline through the fastening support. In the signal receiving and transmitting processing unit, a laser drive device is connected with the optical fiber through a wavelength division demultiplexer, the optical fiber is connected with the input end of a photoelectric detector through the wavelength division demultiplexer, and the output end of the photoelectric detector is connected with the input end of a signal processor. The data analysis and alarm unit comprises a PC terminal and an alarm indicator, wherein the output end of the signal processor is connected with the PC terminal, and the alarm indicator is connected with the PC terminal. The situation of high-energy pipeline system leakage in nuclear islands can be found in time, the leakage positions can be accurately positioned, the implementation foundation is provided for the leak-before-break design of the high-energy pipeline, and the safety of nuclear power plants is improved.

The invention discloses a network fault detection method and system. The method is suitable for being executed in an aggregation server; the aggregation server is in communication connection with oneor more network servers and a database server; the network servers are accessed to multiple Internet data centers; each Internet data center is deployed with multiple switches; multiple hosts are accessed to each switch; and a corresponding data probe is preset in each host and is in communication connection with the network server. The method comprises steps: one or more index data reported by the network server are received, wherein the index data are formed by the network server according to a detection result reported by each data probe; according to the index data in an abnormal state, anetwork connection is detected; and if the detection result indicates the network connection fails, an alarm is given; the index data with normal states are subjected to aggregation calculation to acquire corresponding network quality data; and the network quality data are transmitted to the database server for being stored conveniently.

The invention provides an intelligent tracking cradle head having a radar monitoring function. The intelligent tracking cradle head comprises a cradle head body and a radar monitor, wherein the radar monitor is arranged on the cradle head body; the cradle head body is used for supplying a working power supply to the radar monitor through a power line; and the cradle head body is communicated with the radar monitor through a communication line. A monitoring method is further provided. Compared with the prior art, the intelligent tracking cradle head having the radar monitoring function and the monitoring method have the advantages that I, by using the active monitoring function of the radar monitor, intelligent monitoring and automatic tracking functions of the cradle head can be rapidly realized; II, the radar monitor is carried by using the cradle head, so that all-dimensional coverage of a monitoring region can be realized; III, by using the active monitoring effect of the radar monitor, monitoring dead corners and monitoring dead zones of a visible light camera can be effectively avoided, and meanwhile the application effect of the cradle head under severe weathers or in special environments is ensured; and IV, The intelligent tracking cradle head is wide in application, and can be widely applied to various monitoring fields.

The invention relates to a distributed-cache-based acquisition task scheduling method in a purchase, supply and selling integrated electric energy acquiring and monitoring system. The distributed-cache-based acquisition task scheduling method comprises the following steps of: creating acquisition tasks by a task manager according to a task template, storing the acquisition tasks in a task data area of a distributed cache, distributing tasks by the task manager in a balanced manner according to load situations of all acquisition nodes in a preposed acquisition cluster, enabling the acquisition nodes to get the tasks through a message bus, starting corresponding task executing flows and updating executing states of the tasks back to the distributed cache after completing the execution of the tasks. The distributed-cache-based acquisition task scheduling method disclosed by the invention has the benefits of well solving a task scheduling problem of bulk data, fundamentally solving the bottleneck problems of a great deal of types of data and large data quantity of the purchase, supply and selling integrated electric energy acquiring and monitoring system and realizing high-efficient, balanced and stable scheduling of the acquisition tasks.

The invention discloses a positioning and tracking system of an underground/roadway moving object, comprising underground positioning and tracking systems distributed under a detected mine and ground monitoring systems distributed on the ground; two-way communication is conducted between the underground positioning and tracking system and the ground monitoring system; the underground positioning and tracking system comprises a plurality of wireless radio-frequency labels, a plurality of wireless signal receiving and transmitting devices and a plurality of card readers which are respectively carried by underground workers, are internally stored with the information of the identity and engaged job category information of a cardholder, can read the stored information in the wireless radio-frequency labels within respective signal coverage area in real time, and synchronously upload the read information and the internally-stored information to the card reader of the receiving and transmitting device; and the wireless radio-frequency labels are distributed on a coal mining work surface or a coal mining roadway. The positioning and tracking system has reasonable design, convenient installation and distribution, low cost, complete function and good use effect, and also improves the coverage area correspondingly while saving the cost.

The invention belongs to a preparation method for preparing a polymer skeleton with the surface coated with HKUST-1 through 3D printing, and an application of a polymer skeleton. The preparation method comprises the following steps: printing the polymer skeleton according to a structure specified in a model file by using a 3D printer, and adding the polymer skeleton into an ethanol water solution containing copper salt and trimesic acid; stirring and dripping triethylamine into the ethanol water solution; drying an obtained product at normal temperature or at 50-80 DEG C; soaking the product in methanol, and during the period, replacing the methanol solvent once every 8 hours; drying at the normal temperature or at 50-80 DEG C. According to the preparation method disclosed by the invention, the reaction conditions in the preparation process are moderate, the synthesis is performed at the normal pressure, no pressure equipment is required, the grain size of crystals which form the HKUST-1 is from 20 nanometers to 5 micrometers, the HKUST-1 is uniformly distributed on the surface of a polymer, and the full coverage rate is basically realized. The prepared polymer skeleton with the surface coated with the HKUST-1 has a remarkable dye adsorption effect, and the adsorption efficiency can be over 90%.

The invention discloses an intelligent firefighting rescue command and dispatch system. The intelligent firefighting rescue command and dispatch system comprises a main individual transmitter, a positive pressure air breathing apparatus, an intelligent firefighting bracelet, an audio and video helmet, a Mesh network repeater, an interphone, an emergency command box, a positioning module and a main positioning IPC (Industrial Personal Computer), wherein the main individual transmitter performs information exchange with each of the positive pressure air breathing apparatus, the intelligent firefighting bracelet, the audio and video helmet and the Mesh network repeater through the wireless network, the Bluetooth, signal lines and the Mesh network, so as to monitor the on-site rescue situation in real time; the emergency command box performs information exchange with the 119 command center through 4G; and the positioning module is connected with the main positioning IPC through a wireless serial port to realize the positioning of rescue workers. According to the intelligent firefighting rescue command and dispatch system, the seamless information integration of a plurality of departments is realized through the effective network convergence, and meanwhile the vital signs of rescue workers and the air pressure values in air bottles can be monitored in real time, an early warning is given to the rescue workers, and the expansibility is good due to reserved interfaces.

The invention relates to an unmanned aerial vehicle for traffic guidance and an application of the unmanned aerial vehicle. The unmanned aerial vehicle comprises a vehicle body, and the unmanned aerial vehicle further comprises a main camera group, an LED display screen and a loudspeaker, wherein the main camera group is arranged on the vehicle body and is used for collecting traffic condition data; the LED display screen is arranged in a belly position of the vehicle body, and is used for displaying traffic guidance commands obtained based on the traffic condition data; and the loudspeaker is arranged in the belly position of the vehicle body, and is used for broadcasting the traffic guidance commands obtained based on the traffic condition data. Compared with the prior art, the unmanned aerial vehicle disclosed by the invention has the advantages of being not subject to road conditions, and being flexible, accurate and rapid; the unmanned aerial vehicle can shoot pictures over an accident point, so that a full coverage of law enforcement is achieved, professionals can quickly determine a core accident point, shot pictures and shot videos can be delivered to the professionals at the first time, and in-time handling of traffic accidents can be guaranteed.