31results about How to "Avoid losing contact" patented technology

The invention discloses an AGV device-based logistics multi-task control system in the field of logistics control management. The system comprises a 3DP sand mould printing unit comprising multiple 3DP sand mould printers used for performing 3D printing operation in a sand box, a later processing unit used for performing solidification and sand removal operations on the sand box subjected to the 3D printing operation, full box caching stations used for temporarily storing the sand box subjected to the 3D printing operation, empty box caching stations used for temporarily storing the empty sandbox processed by the later processing unit, and an AGV device used for transferring the sand box among the 3DP sand mould printing unit, the later processing unit, the full box caching stations and the empty box cashing stations. Through safe connection of an AGV and other devices, and information binding and transmission of the sand box and a sand mould, the design and implementation of transfertask scheduling of the single AGV under complex application conditions of multiple devices, multiple tasks, uncertain paths and the like are satisfied; and the control system can be used in loading and transporting of a 3D sand mould printing process.

The invention discloses an automatic parking and vehicle taking method and system based on big data and artificial intelligence, and for automatic parking, the method comprises the steps of obtainingthe public parking position information near a destination and traffic jam condition information in a big data environment; selecting the optimal parking space meeting the user specified condition comprehensively under the big data condition; and after the parking position is determined, using the unmanned driving technology and the automatic parking technology for safely driving the vehicle to the specified parking space and parking the vehicle in the specified parking space. When the vehicle is reserved to be taken, the method includes sending a riding destination position, selecting a feasible driving route with the assistance of big data, and calculating the expected consumed time for the vehicle to automatically drive to the riding place of the user; and planning the automatic drivingdeparture time reasonably to enable the vehicle to arrive at a specified position within preset time or as soon as possible. According to the invention, the navigation unmanned automatic driving technology is used to comprehensively solve the problem that parking spaces in an urban CBD area are difficult to find or are far and expensive; and meanwhile, the convenient functions that the vehicle owner gets off immediately when arriving at the destination, the vehicle waits in advance for the owner to get on immediately when arriving at the destination and the like are achieved.

The invention discloses an assistant positioning system and assistant positioning method of a shared bicycle. The system comprises a server, a handheld operation-maintenance terminal, and a pluralityof equipment terminals; the equipment terminal is installed on the shared bicycle; the terminal equipment comprises a controller, and a GPS module, a mobile communication module, a near field communication module and a beacon module which are connected with the controller; the handheld operation and maintenance terminal comprises the mobile communication module and the near field communication module adapted to the equipment terminal; the equipment terminal and the handheld operation and maintenance terminal perform network connection with the server through the respective mobile communicationmodule. The invention has the advantage that the shared bicycle is positioned through the assistant positioning system, thereby effectively preventing the shared bicycle from losing communication, and providing great convenience for the operation and maintenance of the shared bicycle.

The invention discloses a communication equipment and system and a sleep and wake-up method. The communication equipment comprises a first WiFi module, and a first Bluetooth module which is used for sending a connection maintaining signal to the second Bluetooth module of awakening end communication equipment through a Bluetooth link when the first WiFi module is in a dormant state. The connectionmaintaining signal is used for enabling the first WiFi module to be connected with the second WiFi module of the awakening end communication equipment, and/or the connection maintaining signal is used for receiving the awakening signal through the Bluetooth link, and the awakening signal is used for awakening the first WiFi module in a dormant state. According to the invention, when the communication equipment is in a dormant state, the BT link is adopted to transmit the connection maintaining signal so as to maintain WiFi connection; the awakening signal is transmitted through the Bluetoothlink, and the awakened communication equipment does not need to be awakened regularly, so that the power consumption is saved, and awakening can be realized in time; the BT link is used as a whole toeliminate the power consumption of periodically waking up to send and receive the WiFi frame.

The invention relates to a measurement and control communication management machine for a photovoltaic box transformer substation. The management machine is suitable for intelligent control and communication management of box transformer substations in photovoltaic power stations of non-direct grounding systems or low-resistance grounding systems of 35kV or below. With the measurement and control communication management machine for the photovoltaic box transformer substation adopted, analog quantity acquisition, non-electric quantity protection, remote control and communication functions can be realized at the high and low-voltage side of the box transformer substation. The measurement and control communication management machine integrates the functions of a communication management machine and an optical fiber switch; the measurement and control communication management machine can be connected into equipment such as an inverter, a junction box, an assembly monitor, a video monitoring and a radiation instrument, and therefore, centralized transmission of communication information in the intelligent equipment in the box transformer substation can be realized. The measurement and control communication management machine can be connected into a photovoltaic power plant monitoring system through a self-healing ring fiber, and therefore, remote management and automatic monitoring of a photovoltaic field can be realized, and a fully-intelligent and unattended operation and management mode of the photovoltaic power stations, which requires few workers to guard the photovoltaic power stations, can be satisfied.

The invention discloses a cross-border personnel safety monitoring and position service system based on satellites. The system comprises a core server, a platform end and a mobile end. The input end of the core server is unidirectionally and electrically connected with a Beidou data receiving server and a Beidou director server. The input end of the Beidou director server is unidirectionally and electrically connected with a Beidou center director, and the output end of the core server is unidirectionally and electrically connected with a database service group, a business application server and a server module. The service system provided by the invention can realize multi-mode positioning, and beidou and GPS positioning can be compatible; the service system solves the problems that whenpeople going out overseas are in danger, position information is not easy to find, self-protection cannot be carried out at the first time, and work secret leakage can be caused only by relying on a GPS or other national satellites for positioning at present, and the service system has the advantages of being capable of guaranteeing continuous communication positioning and avoiding overseas work secret leakage and is worthy of popularization.

The invention discloses a method for preparing a graphite-based Si@C negative electrode material by taking micro-silicon powder as a Si source. The method comprises the following steps: pretreating the micro-silicon powder, then carrying out ball-milling mixing and reduction reaction on the micro-silicon powder and magnesium powder, and carrying out acid pickling and centrifugal drying to obtain porous crystal Si particles; and uniformly mixing the prepared porous crystal Si with dopamine in a prepared Tris buffer solution with the pH value of 8.5 to deposit polydopamine on the surfaces of Si particles, and coating the Si to prepare the composite material with the Si-C core-shell structure. The composite material has excellent electrochemical performance, relatively high specific capacity, long cycle life, high capacity retention ratio and stable cycle life; the pore structure of the carbon layer and the Si particles wrapped by the carbon layer also shortens the diffusion distance and time for deintercalation and intercalation of lithium ions; the conductivity of Si is enhanced by the coating carbon layer; and the Si@C core-shell structure also prevents the electrolyte from being in direct contact with Si to form an unstable SEI film.

The invention provides a method and terminal for remote control of an unmanned vehicle; two parallel wireless channels for receiving and sending remote control instructions are monitored, and the frequencies of the two wireless channels are different. According to monitored remote control instructions sent by the two wireless channels, operations corresponding to the remote control instructions are executed; the reliability and stability of a communication link is maximized to guarantee by double-frequency redundant backup communication, signal disconnection and errors caused by interference due to frequency bands are prevented, and the safety and reliability of remote control of the unmanned vehicle can be ensured.

The invention discloses an exploratory well sampling method based on an undisturbed soil exploratory well sampling robot. The method comprises the steps of: 1, determining a position of a soil sample;2, acquiring an exploratory well; 3, lowering the sampling robot; 4, fixing the sampling robot and regulating a height and an orientation of the sampling robot; 5, lowering a sample box; 6, obtainingthe soil sample; 7, setting out the soil sample; 8, transporting the soil sample; and 9, shifting the sampling robot. According to the exploratory well sampling method disclosed by the invention, fixing between the sampling robot and the exploratory well is implemented by utilizing expansion of a supporting airbag; groove carving is carried out by utilizing the robot so as to sample; the soil sample is stably and accurately obtained by adopting a sampling mechanism; disturbance of the soil sample to the sample box in the setting-out process is balanced by utilizing a balancing airbag, so thatundisturbed soil can be taken out in the premise that a worker does not enter the well, thereby ensuring personal safety of the worker; and the exploratory well sampling method is small in volume, light in mass and high in intelligence degree, can be widely used for sampling various types of soil bodies and provides high-quality research samples for scientific research design.

The invention relates to the field of environmental protection equipment and in particular relates to a reaction device for removing ammonia nitrogen in river channel water. The reaction device comprises a floating platform, a propelling assembly, a liquid outlet assembly and a control assembly, wherein the liquid outlet assembly comprises a gas pump, a double-paddle liquid outlet mechanism and aliquid storage tank; the double-paddle liquid outlet mechanism comprises an upper paddle and a lower paddle; a driving motor for driving the upper paddle and the lower paddle to rotate at the same time is arranged at the top of the floating platform; a plurality of liquid outlet holes for discharging liquid are formed in paddle blades of the upper paddle and the lower paddle; the double-paddle liquid outlet mechanism and the liquid storage tank are connected through a hose; a solar cell panel for supplying power is further arranged above the control assembly; the double-paddle liquid outlet mechanism is arranged between the liquid storage tank and the control assembly; the control assembly comprises a controller, a power supply module and a wireless communication module. According to the reaction device for removing the ammonia nitrogen in the river channel water, provided by the invention, manual manner can be replaced to carry out automatic liquid feeding on a river surface; the contact between liquid and river water is more sufficient, the labor cost is extremely reduced and the reaction efficiency is improved.

The invention discloses a method for positioning a robot in a hydraulic pipe culvert, which comprises the following steps of: filling water into the pipe culvert to reduce the interference of a flow field on the robot; the two robots are fixed to the pile numbers a and b correspondingly, and it is guaranteed that the connecting lines of the robots are horizontal through gravity sensors; additionallayers with different densities are wrapped outside the cable, so that the cable is prevented from winding. The horizontal distance between a and b is measured through ultrasonic waves conducted by the pipe culvert; and the first robot is moved to a deeper pile number c, the process is repeated, and the detection work of the whole pipe culvert is completed. According to the method, steering of the detection path can be realized at the inflection point in the pipe culvert, and the distance measurement result of each station is corrected through the position of the internal structure of the pipe culvert. Under the condition that the pipe culvert is closed and robot positioning signals are blocked, local coordinates in the pipe culvert can be established, robot positioning is achieved, the robot is prevented from falling off a steep slope, getting stuck and losing communication, and it is guaranteed that the detection result corresponds to the structure position.