530 results about "Mobile station" patented technology

The invention provides a frequency hopping communication method based on LoRa and a related device, applied to a base station, the method comprises the following steps: configuring to work on m independent channels of a target frequency band, the residence time of each channel being a duration T, m being an integer greater than 1; generating a random frequency hopping sequence according to the pairing code shared with the moving station; hopping to a target channel according to the frequency hopping sequence, and sending a data packet containing a network identifier within the residence time, the network identifier being associated with the pairing code; receiving a frequency matching acknowledgement message fed back by the moving station, wherein the frequency matching acknowledgement message is sent after the moving station monitors the data packet and verifies that the network identifier is matched; in response to the frequency matching confirmation message, issuing a synchronization instruction containing a frequency hopping sequence to the moving station; and performing data frequency hopping transmission with the moving station on m independent channels based on the synchronization instruction. Through dynamic random frequency hopping and time synchronization, efficient and reliable frequency hopping communication between a base station and a moving station is realized.

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Embodiments herein provide higher priority PLMN selection method during disaster situation in a wireless network (1000) by MS (100). In an embodiment, when MS (100) is registered for the disaster roaming service, the method includes selecting a higher priority PLMN in a priority order when the higher priority PLMN is available in the network and other non-forbidden PLMN when the higher priority PLMN is unavailable in the network, and registering the MS to receive the service in the network on one of the selected higher priority PLMN, and the selected other non-forbidden PLMN. In another embodiment, when the MS is not registered for the disaster roaming service, the method includes selecting a higher priority PLMN in a priority order when the higher priority PLMN is available in network, and registering the MS on the selected higher priority PLMN to receive the service in network.

This disclosure relates to wireless communication methods that reduce power usage in a mobile station caused by monitoring Physical Downlink Control Channel (PDCCH). The mobile station can implement a PDCCH monitoring skipping behavior including skipping the monitoring of the PDCCH for a skipping period.

The invention discloses a mining vacuum drainage system, which relates to the technical field of mine drainage and comprises a tail end water collector, a height difference controller, a three-phase generator, a vacuum pipeline, an auxiliary pump station, a slag separator, a pump station system and a control system. It is ensured that the system safely and efficiently operates in roadways, tunneling faces or fully mechanized coal mining faces of coal mines, strip mines or non-coal mines. The system is applied to the tail end drainage requirement of a drainage system, a series of problems caused by decentralized drainage in a coverage area can be solved only through one vacuum drainage system, concentrated drainage of multiple drainage points is achieved, facilities such as a shift transformer, a switch, a cable, an electric pump, an air pump and an air pipe are omitted, and the cost is reduced. Concentrated drainage can be achieved only through the pump station, the vacuum pipeline and the matched water collector, great cost is saved in the aspects of purchase, installation, operation and maintenance, energy consumption, inspection, overhaul, recovery and the like of traditional drainage equipment, and the comprehensive efficiency of an original drainage system is remarkably improved.

The utility model discloses a shoulder type precise positioning fertilization system which comprises a Beidou / GPS receiving base station, a Beidou / GPS receiving mobile station, a quantitative fertilizer applicator, a server and a user side, and the Beidou / GPS receiving base station and the Beidou / GPS receiving mobile station are in mutual wireless communication connection with a Beidou / GPS satellite navigation positioning system. The Beidou / GPS receiving mobile station is installed on the quantitative fertilizer applicator in an electric connection mode, the quantitative fertilizer applicator is in wireless data transmission connection with the server, the server is in wireless data transmission connection with the user side, the quantitative fertilizer applicator is a shoulder type quantitative fertilizer applicator, and a fertilizer application switch, a mobile communication module, a camera, a control module and a power supply are installed on the quantitative fertilizer applicator. The fertilization switch, the mobile communication module and the control module are electrically connected with the power supply, and the Beidou / GPS receiving mobile station is electrically connected with the control module and the power supply. According to the utility model, the problem of large positioning data information error frequently occurring in the use process of the existing fertilizer applicator is solved, and the common phenomena of fertilizer application position information drifting, overlapping and the like are eliminated.

The present invention provides a method for low-complex estimation of Direction of Arrival (DoA) and Time of Arrival (ToA) in multi-antenna-based communication comprising detecting overlapped paths between a Mobile Station (MS) and a Base Station (BS) operating under said multi-antenna-based communication with scatters present therein involving channel paths represented as Channel Impulse Response (CIR) defined with channel signatures including delay and angle steering vectors, decoupling the channel paths in delay and angle-domain and separately estimate the DoA and ToA of each path with a low computational complexity which is based on one-dimensional low-index based rotation methodology and finally pairing the DoA and the ToA.

The invention provides an immersed tube joint sinking butt joint underwater space positioning system and method. The immersed tube joint sinking butt joint underwater space positioning system comprises a clinometer, a mobile station group, a tide gauge, a multi-beam sonar and a monitoring data analysis and display module. The inclinometer obtains bidirectional dip angle monitoring data of the immersed tube joint; the mobile station group obtains coordinate monitoring data of positions where the mobile stations are located respectively; the tide level meter obtains tide level monitoring data in the pipe joint sinking and butt joint period; the multi-beam sonar obtains the terrain data of the underwater foundation trench in the pipe joint sinking and docking area; the monitoring data analysis and display module obtains feature point coordinates, pipe joint postures and early warning index data on a to-be-immersed pipe joint according to the inclinometer monitoring data, the mobile station group monitoring data, the tide level data, the multi-beam underwater topographic data and the immersed pipe joint coordinate data.

The invention provides a troposphere delay correction method and system, electronic equipment and a storage medium, and the method comprises the steps: extracting troposphere delay of a reference station through a non-difference combination observation value method according to the obtained real-time reference station observation data, broadcast ephemeris, ultra-fast orbit and clock correction, carrying out the adjustment of observation values of a plurality of satellites, and carrying out the adjustment of the observation values of a plurality of satellites; the zenith troposphere delay of the base station is obtained; the zenith troposphere level of the base station after normalization processing is interpolated to the position of the moving station through an inverse distance weighted interpolation method, zenith troposphere delay of the moving station is obtained according to a pre-constructed elevation normalization model, and the elevation normalization model is constructed based on ERA5 horizontal atmospheric layer meteorological data. According to the method, the adaptability of the model to complex terrains can be improved, so that the model precision is improved, the precision single-point positioning convergence time of the moving station is effectively shortened, and the precision single-point positioning precision is improved.

The invention discloses a UWB indoor positioning method based on an RTK difference thought, and relates to the technical field of indoor positioning. Comprising a base station, reference stations and a mobile station, and specifically comprises the following steps that 1, UWB signals are sent through the base station, a plurality of reference stations with known accurate coordinates are deployed indoors, the reference stations are UWB anchor points, and the positions of the reference stations are calibrated in advance through laser surveying and mapping; according to the method, the base station with the known accurate position is deployed indoors, the base station is used for calculating the error in the UWB signal propagation process, the error correction information is sent to the mobile station, and the mobile station corrects the distance measurement result of the mobile station according to the correction information, so that the precision and the stability of UWB indoor positioning are improved. The UWB indoor positioning method effectively solves the problem of positioning errors caused by factors such as multipath effect, non-line-of-sight and clock drift in UWB indoor positioning, and is suitable for various indoor scenes such as industrial storage, medical care for the aged and emergency rescue.

The invention discloses a universal mounting platform for multi-size semiconductor chips, and relates to the technical field of semiconductor testing and packaging, the universal mounting platform comprises a base, a chip use platform is fixedly arranged in the base, an adjustable chip positioning mechanism is arranged on the base, a fixing frame is fixedly arranged on the base, and the adjustable chip positioning mechanism is arranged on the fixing frame. A chip collecting structure and a discharging structure are arranged on the fixing frame; the adjustable chip positioning mechanism comprises a first electric sliding rail, the first electric sliding rail is fixedly arranged on the base, a moving table is arranged on the first electric sliding rail in a sliding mode, a machining groove is formed in the base, and adapter plates for different pin chips are arranged on the moving table. According to the invention, clamping of a plurality of chips is realized through the adapter plate, temporary storage and blanking of the plurality of chips are conveniently realized through the collection structure and the blanking structure, and the problems that the shutdown time of equipment is increased and the test efficiency is reduced due to frequent replacement of clamps in the prior art are solved.

The invention relates to the technical field of medical inspection equipment and portable cold chain control, in particular to a foldable temporary inspection reagent refrigeration box temperature control and pipettor waste liquid early warning system. The system is composed of a semiconductor refrigeration and phase change cold storage composite temperature control unit, a reagent position RFID and expiration management module, a temperature, humidity and vibration monitoring module, a waste liquid collection and liquid level and component monitoring unit, an edge control and information interaction terminal, a pipettor interface control module, a folding state detection module and a power supply and battery management module. 2-8 DEG C closed-loop temperature control and timing temperature return are realized; when the event is close to a threshold value, alarming and prohibiting cover opening, and locking suction and discharge; and recording the cold chain and tracing. According to the technical scheme, 2-8 DEG C closed-loop temperature control and timing temperature returning are achieved, automatic temperature control tightening, cover opening forbidding, suction and exhaust locking and chain type tracing are achieved in the abnormal state, and the problems that temperature control beside a mobile station is disjointed with authority, and tracing is insufficient are solved.

The invention relates to a mobile storage and charging all-in-one machine and an application method, the mobile storage and charging all-in-one machine comprises a storage and charging machine and a mobile station, the storage and charging machine is internally provided with an energy storage bin, an AC power distribution bin, a DC power distribution bin and an energy management system, and the energy storage bin is internally provided with a liquid-cooled battery pack; a PCS and an alternating current conversion device are arranged in the alternating current distribution bin, a power conversion unit and a direct current conversion device are arranged in the direct current distribution bin, a charging device is arranged on the outer wall of the direct current distribution bin, and the storage and charging machine is detachably installed on the moving table. The energy management system is in signal connection with the liquid-cooled battery pack, the PCS, the power conversion unit, the direct-current conversion equipment and the mobile station; the charging device outputs direct current outwards or receives an external direct current power supply to charge the liquid-cooled battery pack, and the alternating current conversion device outputs alternating current outwards or receives an external alternating current power supply to charge the liquid-cooled battery pack. The invention aims to provide the mobile storage and charging all-in-one machine which is low in cost, wide in application range, sufficient in electric energy, high in maneuverability, intelligent and capable of being remotely regulated and controlled and the application method.

A method for operating a mobile station (STA) to periodically change its medium access control (MAC) address includes transmitting, from a STA, a first capability indication to an access point (AP) indicating that the STA supports identifiable random MAC (IRM). The STA receives a second capability indication from the AP indicating that the AP supports IRM. A first IRM address (IRMA) is determined and a first association between the STA and the AP is established using the first IRMA. A determination is made whether to change a MAC address of the STA. In response to a determination to change the MAC address of the STA, without disconnecting from the AP, a second IRMA is determined and a second association between the STA and the AP is established using the first IRMA. During the second association, the second IRMA is transmitted from the STA to the AP.

A method includes calculating, by a mobile station, a second coordinate according to a first coordinate and a first observation value of a first base station, and a second observation value published by a second base station; and determining, according to the calculated second coordinate, whether there is a deviation in a third coordinate published by the second base station. When there is a deviation in the third coordinate, calculating location information of the mobile station according to the second coordinate and the observation value of the second base station, wherein the first coordinate and the first observation value are information used for calculating the location information of the mobile station before base station is switched. The first base station publishes the coordinate to the mobile station before base station is switched; and the second base station publishes the coordinate to the mobile station after base station is switched.

The invention belongs to the technical field of radar performance evaluation and calibration, and discloses a low-altitude perception radar evaluation and calibration system and method, and the system comprises an RTK base station, a radar, a processor, a plurality of unmanned aerial vehicles, and RTK mobile stations disposed on the unmanned aerial vehicles. The RTK base station is arranged in an unshielded area within a preset distance with the radar as the center; the unmanned aerial vehicle flies according to a preset flight path; the RTK mobile station is used for collecting truth value data of the corresponding unmanned aerial vehicle and sending the truth value data to the processor; the radar is used for collecting detection data of a detection area and sending the data to the processor. The processor is used for constructing a data set according to each piece of received truth value data and each piece of detection data; calculating performance evaluation parameters of the radar according to the data set; and calculating pitch deviation correction and azimuth deviation correction of the radar based on the performance evaluation parameters and each piece of true value data, and calibrating the radar. The sensing precision of the radar to the unmanned aerial vehicle in the low-altitude range can be improved, and the low-altitude management and control efficiency is improved.

One or more wireless stations operate to configure direct communication with neighboring mobile stations, e.g., direct communication between the wireless stations without utilizing an intermediate access point. A wireless station may enter an unsynchronized discovery mode, transmit, in response to receiving a subscribe message from a neighboring device, a publish message to the neighboring device, perform authentication and trusted device cluster provisioning with the neighboring wireless device, and protect transmissions using the security credentials. In the unsynchronized discovery mode, the wireless device may monitor a discovery channel for subscribe messages, e.g., from neighboring peer devices. Additionally, the trusted device cluster provisioning may provide security credentials to the wireless device. Note that protecting transmissions using the security credentials may include protecting a trusted device cluster identity, transmitted beacons, transmitted management frames, or transmitted action frames using the security credentials acquired via the trusted device cluster provisioning.

The utility model discloses an assembly type building reverse ceiling construction auxiliary device, including mobile station, both sides of the bottom of mobile station all rotatoryly connected with removal wheel, the top fixed connection of mobile station has the limit stop, both sides of the top of limit stop all fixed connection has a set of limit stop slide bar no.

To provide a position estimation apparatus that estimates a position of a mobile station in a hierarchy indoors.SOLUTION: A position estimation apparatus includes a computing section that acquires position information of a plurality of reference stations, each having a radio communication function and respectively installed on a plurality of hierarchies different in a height direction indoors, acquires signal strengths during respective communications between the plurality of reference stations and a mobile station, and estimates a position of the hierarchy of the mobile station indoors on the basis of the signal strengths.SELECTED DRAWING: Figure 1

The invention relates to a method for operating a mobile station in a radio environment comprising a plurality of radio cells of a plurality of mobile communication networks, each of these radio cells being respectively associated with at least one mobile communication network of this plurality of mobile communication networks, wherein this mobile station is connected or registered to a first mobile communication network of this plurality of mobile communication networks and is additionally able to be connected or registered to a second mobile communication network of this plurality of mobile communication networks, wherein, as a result of a main network selection process performed taking into account this radio environment and network selection data stored in a memory module of this mobile station, this mobile station is connected or registered to this first mobile communication network, wherein at least a part of this network selection data relates to or indicates this first mobile communication network, wherein, in order to cause this mobile station to be additionally connected or registered to this second mobile communication network, this method comprises the following steps: - in a first step, this mobile station comprises or receives secondary network selection data which is at least partially related to this first mobile communication network and which indicates at least this second mobile communication network, - in a second step, in addition to being connected or registered to this first mobile communication network, as a result of a secondary network selection process performed taking into account this radio environment and this secondary network selection data, this mobile station is connected or registered to this second mobile communication network.

The utility model discloses an electronic communication cable cutting device which is characterized in that the upper surface of a cutting table is fixedly connected with a fixed rod, the interior of the fixed rod is movably connected with a movable rod, the surface of the upper end of the movable rod is fixedly connected with a movable table, and the upper surface of the movable table is fixedly connected with an electric hydraulic rod; the output end of the electric hydraulic rod penetrates through the fixing table and is fixedly connected with a first shearing blade, a guide plate is arranged on the upper surface of the cutting table, the second shearing blade is embedded in the surface of the guide plate, a fixing block is fixedly connected to the side face of the cutting table, and an electric telescopic rod is fixedly connected to the inner side face of the fixing block. And the output end of the electric telescopic rod is fixedly connected with a clamping plate, a guide wheel is arranged on the surface of the front end of the cutting table, the situation that the cable deviates in the moving process, and consequently notches of the cable are irregular when the cable is cut is avoided, and the practicability and adaptability of the cutting equipment are improved.

The application discloses an indoor TOA positioning method and device based on an adaptive correction factor, and belongs to the technical field of indoor positioning. The method comprises the following steps: determining the distance between a mobile station and multiple base stations based on TOA measurement values, establishing multiple range circles with each base station as the center and the distance as the radius, and determining the minimum range circle; constructing an error correction equation, introducing a correction factor to dynamically correct the TOA measurement values; counting the number of intersection points between any two range circles under different correction factors in the minimum range circle, taking the correction factor value corresponding to the peak value of the number of intersection points as the optimal error correction parameter; correcting the TOA measurement values based on the error correction equation by using the optimal error correction parameter, and calculating the coordinates of the mobile station based on the corrected TOA measurement values to realize indoor positioning. The application realizes simple, non-iterative, high-precision and strong anti-interference indoor positioning, can meet general indoor positioning requirements, and improves the reliability and efficiency of the positioning system.

An RTK-GNSS positioning system includes a base station including a first receiver to receive base station reception information from a satellite, a mobile station including a second receiver to receive mobile station reception information from a satellite, a first calculator configured or programmed to derive RTK correction information based on the base station reception information, a second calculator configured or programmed to derive error estimation information to correct an error of the mobile station reception information based on the RTK correction information and the mobile station reception information, and a storage to store the error estimation information.

This invention relates to the field of hydrogen swapping robot technology and discloses a mobile hydrogen swapping robot for heavy-duty hydrogen fuel cell trucks. The robot includes a mobile truss with mobile platforms fixed at both ends. First moving wheels are installed below the mobile platforms, and a slide rail is provided below the mobile truss. The first moving wheels are located on the slide rail. A U-shaped seat is provided on the mobile truss, and second moving wheels are installed on both sides of the U-shaped seat. Two strip-shaped grooves are formed on the mobile truss, and the second moving wheels are located within these grooves. During the lifting and replacement of the hydrogen tank module, a first blowing nozzle fixed on the mounting plate can blow the rain and snow adhering to the top of the hydrogen tank module to both sides in rainy or snowy weather. This reduces the risk of short circuits and damage caused by rain and snow contacting the internal electronic equipment of the replaced hydrogen tank module during the hydrogen filling process.

The invention provides a high-precision GNSS displacement monitoring and inclination detection device and method, and relates to the technical field of geological disaster monitoring, and the device comprises a base station module, a mobile station module and a data processing center. A GNSS detection module, a first data communication module and a first power supply module are arranged in the base station module; a plurality of groups of mobile station modules are arranged, and each mobile station module comprises an RTK receiver, an IMU module, a master control MCU, a second data communication module and a second power supply module; the RTK receiver and the IMU module are both in communication connection with the main control MCU; the data processing center comprises a GNSS data processing module, a deformation analysis algorithm module and an early warning management module; the mobile station module, the base station module and the data processing center are in communication connection. According to the invention, the precision and reliability are greatly improved, the false alarm rate is greatly reduced, the coverage of the whole disaster chain from slow creep to instantaneous collapse is realized, and the synergistic effect is improved.

The invention discloses crop growth period monitoring equipment based on remote sensing monitoring, and relates to the technical field of crop growth monitoring, the crop growth period monitoring equipment comprises a mobile station and an observation station, the observation station is installed on the front side of the outer wall of the mobile station, a first visual sensor is installed on the lower side of the outer wall of the observation station, and the observation station is provided with an observation opening; a telescopic assembly is installed on the right side of the outer wall of the observation platform, the observation platform is connected with the telescopic assembly through a fixator, a scanner is embedded in the inner wall of the observation opening, a contraction ring is installed on the lower side of the outer wall of the observation platform, and a cutting blade is installed on the side, close to the observation opening, of the contraction ring. By installing the observation platform, the scanner and the telescopic assembly, the position and angle of the observation platform are adjusted through the telescopic assembly, so that the observation platform can perform multi-angle information acquisition on crops, and the situations that crop information acquisition is accurate and manual intervention is not timely due to environment shielding or environment change are avoided; the function of accurately collecting crop information is achieved.

An apparatus and method for dynamically adjusting a table drive in a medical imaging system are described. An example apparatus includes a table, a table motor controller to move the table, and a detection system to detect a wall, accessory or patient parameter. The detection system includes at least one of a QR code reader, an RFID reader, an NFC reader, a LiDAR sensor, or a camera. A processing system calculates a table drive set point based on the detected accessory or patient parameter and adjusts the table drive and height to prevent collisions. The apparatus also includes a user interface configured to receive user input of room dimensions, which are a factor in determining at least one of an initial table drive set point and the new table drive set point, and a display device configured to provide a graphical depiction of a new maximum scannable range.

The application provides a kind of pneumatic brake device and its control method and motion platform.The pneumatic brake device includes: base, being configured to be connectable with mobile station;Resilient member;And pneumatic structure, with floating state and brake state, pneumatic structure includes air cushion, the first surface of air cushion is configured to be able to align fixed station, resilient member is arranged between the second surface of air cushion and base, air cushion is provided with mutually communicating positive pressure interface and positive pressure outlet, and positive pressure outlet is opened inward along the first surface of air cushion, and positive pressure interface is configured to be able to communicate positive pressure gas source;In brake state, positive pressure gas source is closed, and resilient member will the first surface of air cushion be pressed against fixed station under the action of its elastic force.The technical scheme of the application can solve the problem that existing mobile station and fixed station cannot be fixed relatively when precision equipment stops.

The utility model relates to the technical field of medical air-oxygen mixers, in particular to a medical air-oxygen mixer convenient for replacing a mixing tube, which comprises a moving table, a limiting rod, a sliding frame, a fixed rod, an air-oxygen mixer, an air connecting piece and an oxygen connecting piece, two fixed rods are arranged on the sliding frame in a threaded mode, the fixed rods make contact with the limiting rods, an air and oxygen mixer is installed on the sliding frame, an air connecting piece is connected to the air and oxygen mixer, and an oxygen connecting piece is connected to the air and oxygen mixer. The air-oxygen mixing pipe assembly is pinched by hands, then the driving motor is started, an output shaft of the driving motor drives the friction wheel to rotate, the friction wheel makes contact with the sliding ring, the sliding ring rotates to drive the rhombic magnetic cylinder and the nut to rotate and move rightwards, the nut drives the air-oxygen mixing pipe assembly to move rightwards, and therefore the air-oxygen mixing pipe assembly is separated from the air-oxygen mixing connecting piece; therefore, the purpose of conveniently replacing the mixing pipe is achieved.

The utility model relates to an adjustable modularized injection mold inner heating assembly which comprises a bidirectional sliding table, connecting arms are fixedly connected to two moving tables of the bidirectional sliding table, a sliding block is connected to each connecting arm in a sliding mode, a locking screw is connected to each sliding block in a threaded mode, a socket and a side support are arranged on each sliding block, and the side support is connected with the socket. An electric heating assembly is inserted into the socket and comprises a plug, a sliding rod, a heat conduction base and an electric heating block, two guide holes are formed in the plug, chucks are slidably connected to the positions, beside the guide holes, in the plug, a pressing head is arranged between the two chucks, inclined faces are arranged on the chucks, the pressing head is attached to the inclined faces of the two chucks, and a screw is rotationally connected to the pressing head. The electric heating block is electrically connected with the plug, and the plug is electrically connected with the socket. The electric heating device has the beneficial effects that the modularized electric heating assembly with the adjustable position is arranged, so that the electric heating device is suitable for injection molding heating requirements of different positions, is high in adaptability and can be mounted on different molds for use.