39results about How to "Overcome distance" patented technology

The high strength and low density oil well reinforcing cement has cement mortar density of 1.60 g/cu cm, and consists of oil well cement, weight reducing material, cement mortar stabilizer and admixture. It has optimized material composition, high early stage strength, improved rheologic performance and controllable thickening time, and meets the requirement for reinforcing low stratum pressure oil well.

The invention discloses a LoRa-based remote pig house environment multi-parameter measurement and control system and a LoRa-based remote pig house environment multi-parameter measurement and control method thereof. The LoRa-based remote pig house environment multi-parameter measurement and control system comprises a LoRa terminal, an aggregation node and a pig house group master server, wherein the LoRa terminal comprises a data acquisition module, a power supply module, a controller module, an execution device and a camera module; the aggregation node comprises a LoRa module and a GPRS module; the pig house group master server comprises an on-site monitoring computer, a database module and a functional module; the data acquisition module, the power supply module and the execution device are connected with the controller module, the controller module is connected with the LoRa module via a wireless network, and the GPRS module is connected with the remote master server via an Ethernet.The functional module of the system is capable of displaying pig house on-site videos and environmental parameter values of corresponding points, so that a farmer can log into a website to check theon-site condition of a pig house remotely, thereby realizing intelligent farming. The LoRa-based remote pig house environment multi-parameter measurement and control system and the LoRa-based remote pig house environment multi-parameter measurement and control method combined with a LoRa wireless technology can realize the function of acquiring data of a plurality of terminals and simple networking, are suitable for environment monitoring of livestock breeding farms and have the advantages of remote data acquisition and low power consumption.

The invention relates to a jet type glue supply head. The jet type glue supply head comprises a base, a heating block, a first grade displacement and amplification mechanism, a second grade displacement and amplification mechanism, a striker, a striker return spring, a nozzle, a nozzle holder and a piezoelectric ceramic block, wherein the base is provided with a gel channel, the heating block is arranged in the base, the first grade displacement and amplification mechanism is provided with a plane internal diamond frame, a right stretching arm and a left stretching arm, and the right stretching arm and the left stretching arm are symmetrically arranged on the right side and the left side of the plane internal diamond frame; the second grade displacement and amplification mechanism is provided with a plane external diamond frame, the left stretching arm and the right stretching arm are symmetrically and horizontally connected with the left and right sides of the plane external diamond frame, the upper end of the plane external diamond frame is connected with the upper part of the base, the striker is perpendicularly arranged, the upper end of the striker supports the lower end of the plane external diamond frame, and the lower part of the striker is positioned in the base; and the striker return spring is arranged between the lower end of the plane external diamond frame and the wall of the base, and is sheathed on the striker, the nozzle is arranged on the base by the nozzle holder, the nozzle is right positioned under the striker, a nozzle hole is communicated with the gel channel of the base, and the piezoelectric ceramic block is arranged in the plane internal diamond frame.

The invention discloses an electromagnetic compatibility testing load device and a testing system of a new energy automobile electric driving system. The load device comprises a load motor, a load motor controller, a transmission device, a torque rotating speed sensor, a power supply, a first photoelectric signal converter, a second photoelectric signal converter, a monitoring device, a DC high voltage filter and a screening box; the testing system comprises the load device, an electric driving system, a low-voltage artificial network, a high-voltage artificial network, a high-voltage DC source, a DC filter, a testing table and an anechoic chamber. The load device is movable, capable of realizing high-rotating speed large torque and used for performing electromagnetic compatibility testingof the large power motor, thereby preventing an operation of importing the radiation interference from the external and preventing the load device from producing radiation interference on the external testing environment; furthermore, the testing system takes electricity from the AC power grid, and the mechanical energy of the tested motor is converted into the electric energy through the load device, and then is merged into the AC power grid, thereby realizing the cyclic utilization of the energy and reducing the experimental consumption.

The invention discloses a three-dimensional positioning method used in a visible light communication scene based on fingerprint matching. The three-dimensional positioning method comprises steps that 1, transmitting nodes and fingerprint sampling points are arranged in a positioning scene, and an RSS fingerprint database is established; 2, area locking: according to visible light information received by a receiving end, searching in the RSS fingerprint database is carried out to acquire RSS fingerprint data closest to the visible light information received by the receiving end; by taking the RSS fingerprint data as a center, the searching area is locked; 3, iterative search: in the searching area, K-nearest neighbor iterative search is adopted, the nearest sampling points in vector space formed by transmission distances are searched, and a plurality of nearest fingerprint sampling points are acquired by the searching; 4: position estimation: the averaging of the three-dimensional coordinates of all of the acquired nearest fingerprint sampling points is carried out to acquire the estimation value of the three-dimensional coordinate of the actual position of the receiving end. The three-dimensional positioning method has advantages of high positioning precision and small positioning algorithm complexity.

The invention discloses a transmission-type terahertz spectral analysis method independent of reference light, which comprises the following steps of: (1) performing transmission-type spectral measurement on a tested sample to obtain a terahertz time domain wave form of the tested sample; (2) obtaining a phase spectrum of the tested sample in a system effective frequency range according to the measured terahertz time domain wave form; and (3) extracting a characteristic absorption spectrum of the tested sample in a terahertz wave range from the phase spectrum.

The invention relates to a phase difference estimation method of a distributed radar based on orthogonal waveforms, and the phase difference estimation method solves a phase difference estimation problem in a new system radar specific to a distributed full-coherent radar. The phase difference estimation method comprises: step one, using an amendment cost function to design the orthogonal waveforms: firstly, determining the amendment cost function according to targets provided by a search radar and apriori information of a distance difference of two radars, then using a hybrid optimization algorithm of a simulated annealing algorithm and a traditional iterative algorithm to search a phase space to enable the cost function to be minimum, and accordingly obtaining phase matrixes of sub pulses; and step two, sending the orthogonal waveforms and estimating a phase difference: firstly, using the orthogonal waveforms designed in the step one to conduct up-conversion to obtain transmitting signals of the two radars, enabling target echoes received from the two radars to be separated into four channels of echo signals through a matched filter group after the transmitting signals are reflected by a target, then conducting phase extraction on the four channels of echo signals to estimate the phase difference, and finally conducting average weighting on two estimated values to obtain a final phase difference estimated value.

The invention provides a near field communication method and a near field communication device based on multiple protocols. The near field communication method comprises the steps of receiving information by a first node, wherein the first node supports multiple protocols and has a function of mutual switching among the multiple protocols, and the information comes from a second node or a controller and carries the address of a target device of the information; converting the information into one protocol supported by the target device; transmitting the information converted into the protocol to the target device; furthermore, determining the first node according to the neighbor node list of the second node; and transmitting the information to the first node; or receiving the information which is converted into the protocol supported by the second node via the first node. By using the near field communication method and device based on multiple protocols, the problem that an existing multi-protocol gateway and a terminal have a failure in communication or fail to communicate as being beyond communication distance can be overcome, information transmission between the node and the controller thereof is performed through effectively using the node which supports multiple protocols and has a multi-protocol conversion function, and the near field communication efficiency is improved.

The application provides an optimizer which includes a positive branch, a negative branch, a first voltage sensor, a first capacitor, a second voltage sensor, a second capacitor, an optimizer switch,an optimizer controller, and a third current sensor or a first current sensor and a second current sensor. The application further provides a photovoltaic power generation system which includes a photovoltaic string unit, an inverter, a wake-up power supply and a wake-up switch. The photovoltaic string unit includes at least one set of photovoltaic panels and the optimizer. The application furtherprovides a photovoltaic power generation control method. The technical scheme of the application overcomes the shortcomings of the prior art: the transmission distance of weak signal communication isshort; the communication robustness is easily affected by the interference from the power transformation noise in the system and the surrounding environment noise; and the communication cost is high.A special weak signal communication module can be omitted. The communication cost of the distributed photovoltaic power generation system can be significantly reduced.

The invention provides a long-distance large-range optical fiber strain generating device. The device comprises a dual-frequency laser interference length measuring device light source, a detector and a full reflection device, wherein the dual-frequency laser interference length measuring device light source and the detector are fixed to a left clamp carrier platform, the full reflection device is fixed to a right clamp carrier platform, and the dual-frequency laser interference length measuring device light source, the detector and the full reflection device form a distance measuring laser light path which is used for measuring the optical fiber distance and the optical fiber strain value. By means of the scheme, a sliding rail is moved for a long distance so that distance measurement is changed into displacement measurement. The original length and the stretching length of an optical fiber strain generation portion can be precisely measured through the high-precision long-distance dual-frequency laser length measuring device. Strain is generated precisely through an electric control displacement platform. Strain generation precision is improved and the optical fiber length is increased, and the defects that an existing strain generating device is low in precision and short in optical fiber operation distance.

The invention discloses a power transmission line online inspection flight monitoring system comprising an inspection command car and an aircraft; the inspection command car moves along a fixed powertransmission line, and controls the aircraft to move in certain assigned area; a remote transmit-receive device, a command operation system, a wireless data video image acquisition system, a generatorand a computer are arranged in the inspection command car; the remote transmit-receive device controls the aircraft to transmit the data gathered in a preset time period to the wireless data acquisition system; the wireless data acquisition system receives the aircraft data and transmits same to the computer. The system uses a redundancy determination mode to determine a power transmission line fault generation position and an aircraft deviation position, and the determination mode is accurate; the system uses field video taking mode to determine fault positions; the video data can be processed by a digital determination mode, and the determination can be done in a direct image contrast mode; the determination modes are more directly.

The invention relates to a self-help eye dropping device. The self-help eye dropping device comprises a strip-shaped horizontal support plate, wherein a finger coat is fixedly arranged under the frontend of the horizontal support plate and is used for clamping a finger; a vertical connecting part is fixedly arranged above the front section of the horizontal support plate; a hollow hole is formedin the vertical connecting part, and is used for a container nozzle to penetrate through; elastic clamp sheets are arranged above the horizontal support plate, are used for clamping an eye medicine container body, and are matched in a left and right way; the upper end of the vertical connecting part is also connected with a longitudinal connecting part which is in contact with a forehead, and is provided with a Y-shaped clamp arm assembly; the Y-shaped clamp arm assembly comprises a left clamp arm and a right clamp arm, a left clamp block is arranged in the middle part of the left clamp arm, aright clamp block is arranged in the middle part of the right clamp arm, and the left clamp block and the right clamp block are matched in pair to extrude the eye medicine container body. The self-help eye dropping device has the advantages that a patient is assisted to drop the medicines into eyes by self; the fixed-point, fixed-distance and fixed-eye dropping effect is realized; the eye medicine can be accurately dropped to the target position, and the injury to eyes by the container nozzle is avoided.

The invention discloses a spaceborne multi-baseline holographic SAR imaging method, which realizes 360-degree omnibearing imaging based on multiple navigation geosynchronous orbit baselines. The method comprises the following steps: S1, an orbit model for geosynchronous orbit spaceborne holographic SAR imaging is constructed; S2, based on the orbit model and an imaging geometric model of the geosynchronous orbit spaceborne holographic SAR imaging, a geosynchronous orbit spaceborne holographic SAR echo signal model is constructed; S3, two-dimensional holographic imaging is carried out; S4, a three-dimensional imaging sparse basis is constructed through constructing an altitude sparse basis; S5, the altitude of a ground target is reconstructed by using a compressed sensing reconstruction algorithm; and S6, a holographic image is displayed. The problems that the airborne platform has a small detection range, the detection area is limited, and the holographic imaging quality is affected bythe movement of a carrier and the like can be solved.

The invention provides a tumbler mechanism wireless energy transfer coil device and method capable of resisting lateral deviation. When a first magnetic force control module at a transmitting coil receives the magnetic force of a second magnetic force control module at a receiving coil, a tumbler module for fixing the transmitting coil is driven to deflect by taking the gravity center of the tumbler as an axis, so that the transmitting coil generates angular deflection and position movement to achieve the purpose of tracking of the position of the receiving coil. When the receiving coil is misplaced, the tumbler mechanism wireless energy transfer coil device and method provided by the invention can optimize the relative positions of the transmitting coil and the receiving coil during energy transmission to greatly improve the energy transmission efficiency. The tumbler mechanism wireless energy transfer coil device and method partially overcome the defects that the transmission distance is low and the transmission efficiency is low caused by malposition of the coils and improve the lateral deviation resistance of the wireless power transmission system.

The invention discloses an aerostat cable take-up and pay-off experiment system based on Profinet communication. The aerostat cable take-up and pay-off experiment system comprises a load winch used for simulating an aerostat load, a force measuring pulley used for conveniently measuring cable tension, a traction winch used for pulling a cable, a cable arrangement mechanism, a cable storage winch used for storing the cable and a control system. One end of the cable is tied on the load winch, sequentially bypasses the force measuring pulley, the traction winch and the cable arranging mechanism and is tied on the cable storage winch; the control system is connected with the load winch, the traction winch, the cable arrangement mechanism and the cable storage winch and controls the operation states of the load winch, the traction winch, the cable arrangement mechanism and the cable storage winch. The load winch capable of providing load changes is used for overcoming the limitation of a traditional tower suspended weight load experiment, the load winch is used for verifying the cable arrangement speed and operation characteristics under the full-load condition, and aerostat load changes can be simulated.

The invention provides a deflectable cutting device of a coal mining machine and mainly aims at solving the technical problems of low production efficiency and the like. According to the adopted technical scheme, the device is provided with a transitional frame; the tail end of the transitional frame is hinged with a machine body; the side A of the head end of the transitional frame is hinged with a rocker arm assembly, and the side B of the head end of the transitional frame is provided with an oil cylinder assembly; and one end of the oil cylinder assembly is hinged with the transitional frame, and the other end of the oil cylinder assembly is hinged with the rocker arm assembly. The deflectable cutting device is suitable for a high-power coal mining machine for thin and extremely thin coal seams under a complicated geological condition.

The invention discloses a multi-actuator cylinder cooperative control device and control method. By the aid of the method, a plurality of actuator cylinders can be controlled by a flight control unit and a remote control unit or an operating rod to collaboratively make telescopic movement, switching can be conducted conveniently between two control modes, each set of control loop has the two protecting modes of software limiting and hardware limiting, the actuator cylinders can be prevented from stretching beyond a limited movement range, and thus an actuator cannot be clamped; when a normal control mode loses efficacy, the device can be timely switched to be in an emergency control mode, an emergency loop is composed of an independent relay set, and thus normal movement of the actuator can be guaranteed when the normal control mode loses efficacy. By means of the multi-actuator cylinder cooperative control device and control method, the defects that a traditional single-actuator cylinder controller is large in size, manual operating rod signals and remote control unit signals are not compatible, and the control movements of multiple actuator cylinders are not consistent are overcome, the moving speed and the moving range of each actuator cylinder can be controlled through software, and the control precision and the flexibility of the control device are improved.

The invention provides a fake-licensed ship identification method and system, and the method comprises the steps: obtaining a ship automatic identification system (AIS) data sequence belonging to the same ship identification information, arranging the AIS data in the AIS data sequence according to the receiving time, wherein the AIS data comprise dynamic information; based on dynamic information contained in AIS data in the AIS data sequence, determining a plurality of dynamic trajectory branches, and determining the category of each dynamic trajectory branch, wherein the category comprises fake-licensed ship branches; if it is judged that the dynamic trajectory branches include fake-licensed ship branches and the number of the fake-licensed ship branches is larger than 1, determining that the ship identification information is identification information of the fake-licensed ship. According to the fake-licensed ship identification method provided by the invention, external factors such as weather and distance can be overcome, the fake-licensed ship can be effectively identified, a perfect ship number identification monitoring system does not need to be erected, the identification cost of the fake-licensed ship is reduced, and an AIS data sequence is adopted, so that the identification accuracy of the fake-licensed ship is ensured.

The invention relates to the field of liquid detection and particularly discloses a device and method for measuring the liquid level of an optical fiber adjustable in precision on the basis of opticalchaos. The purpose of on-line liquid level measurement with long distance, controllable precise and multiple channels is achieved. The device comprises a chaotic light source module, an optical fiberamplifier, a coupler B, a photoelectric conversion module, a data acquisition card, a computer, a circulator and a sensor network module. A sensing unit is composed of several equal-length optical fiber segments connected in series, Fresnel reflection is introduced, cross-correlation operation is used for detecting Fresnel reflection effects at gaps, and liquid level information of a to-be-measured liquid is obtained according to the changes of correlation operation results, namely correlation peaks; the precision of a sensor is effectively improved by using ultra-wideband characteristics ofa chaotic light source, and meanwhile the sensing precision is controlled by adjusting the intensity of a feedback optical signal in the chaotic light source; on this basis, the device and method alsoachieve long-distance multi-point liquid level measurement and are suitable for occasions in demands of long-distance liquid level measurement.

The invention provides a solar water pumping device which comprises a rack, a power storage and supply assembly, a photovoltaic panel assembly and a flexible shaft pump assembly. The solar water pumping device provided by the invention overcomes the defects of long power grid transmission distance, high investment cost of power supply equipment and the like, and achieves the purposes of taking solar photovoltaic power generation as water pumping energy and pumping water on site. When being used for irrigation, the solar water pumping device has positive significance for reducing the irrigation operation cost and the irrigation equipment engineering investment cost, and has more pertinence and practicability for irrigation of remote fields which are not suitable for large-scale irrigation equipment. The effect of supplying water to farmlands, pasturing fields, forests and grassland, farmhouses and courtyards without power supply of a power grid is achieved.

The invention relates to an ultrasonic chromatography flow field imaging method and device. The method comprises the following steps: S1, obtaining the boundary of a water area to be detected, building a two-dimensional rectangular coordinate system, and dividing the boundary into N scanning points at equal intervals; S2, fixedly arranging a first ultrasonic extension set at one scanning point, and mutually receiving and transmitting ultrasonic signals with the first ultrasonic extension set through a second ultrasonic extension set at other scanning points; S3, fixedly arranging the first ultrasonic extension set at the next scanning point, and transmitting and receiving ultrasonic signals with the first ultrasonic extension set through the second ultrasonic extension set at other scanning points; S4, circulating the step S3 till that the first ultrasonic extension set transmits and receives at all the scanning points; S5, acquiring an acoustic propagation time difference set of acoustic mutual transceiving of each pair of scanning points; S6, acquiring propagation velocity components of a flow field corresponding to an X axis and a Y axis in a flow velocity relation; and S7, reconstructing the spatial distribution of the flow field according to the flow velocity relation.

The invention discloses a Zigbee wireless communication device, which comprises a CC2530 single chip, an antenna, a crystal oscillator with the frequency of 32MHz and a terminal, wherein in the CC2530 single chip, an RFN end and an RFP end are connected with the antenna; a P2.3 end and a P2.4 end are connected with the crystal oscillator with the frequency of 32MHz; and a P0.2 end and a P0.3 end are connected with the terminal. The Zigbee wireless communication device can overcome the defects of short communication distance, low communication speed, low penetrating power and the like in the prior art so as to achieve the advantages of long communication distance, high communication speed and high penetrating power.

The invention discloses a 3-DOF (degree of freedom) mobile loading platform for a vertical optical microscope. An optical source is disposed on a horizontal position adjustment platform. One end of a lifting rod is fixed with the horizontal position adjustment platform, and the other end extends into a bottom seat. A displacement adjustment handle driving the lifting rod to move upward along a vertical direction in the bottom seat is disposed on the bottom seat. The horizontal position adjustment platform comprises two horizontal displacement guide blocks, two horizontal displacement adjustment handles, and a base seat. The two horizontal displacement guide blocks are disposed along the vertical direction on the bottom seat. The sides of the horizontal position adjustment platform are respectively provided with the horizontal displacement adjustment handle driving the horizontal displacement guide block at an upper layer to move along a horizontal direction on the horizontal displacement guide block at a lower layer, and the horizontal displacement adjustment handle driving the horizontal displacement guide block at the lower layer to move along the horizontal direction on the bottom seat. The moving directions of the two horizontal displacement guide blocks are perpendicular to each other. According to the invention, an observed object can be quantitatively moved in the horizontal direction, and the focusing accuracy of a lens barrel can also be improved.

The invention discloses a 5G + CMFT-R time domain electromagnetic field exploration system and method, and is suitable for detection and control of roof water damage in the coal mining process. In view of the characteristics of coal seam roof thickness, complex ground surface and the like in northwest regions of China, aiming at the defects of the existing ground and underground transient electromagnetic detection method, the invention adopts a transmitting coil to surround a coal face to implement primary electromagnetic field transmission, and an underground signal transmission system and aground signal acquisition system are connected to finish the same-frequency synchronization of receiving and transmitting; and a ground receiving coil receives the secondary electromagnetic field point by point according to the measurement network arrangement. And the acquired current and voltage data are converted into apparent resistivity data so as to acquire apparent resistivity images of different layers and carry out anomaly interpretation. The method can give full play to the detection advantages of the transient electromagnetic method in the northwest coal mine area, obtains a higher-precision detection result at a lower cost, can accurately judge the spatial position of the water-rich area of the coal seam roof, and provides reliable technical parameters for safe and efficient production of a coal mine.

The invention discloses a dual-light imaging system image registration method and device, and the method comprises the steps: obtaining an image of a target object through the dual-light imaging system, obtaining a first waveband image and a second waveband image of the target object, and obtaining the distance from the dual-light imaging system to the target object; according to the affine transformation parameters corresponding to the distance, cutting out corresponding image areas from the first waveband image and the second waveband image of the target object; and registering the first wave band image and the second wave band image of the target object according to the edge features contained in the image area cut from the first wave band image of the target object and the image area cut from the second wave band image of the target object. According to the image registration method and device for the dual-light imaging system, the registration precision can be improved, and the defects that in the prior art, the requirement for the stability of an imaging device framework is high, and the registration effect of a close-range target is poor are overcome. The invention further discloses a bifocal imaging system and a computer readable storage medium.

The invention provides a novel underwater unmanned integrated test platform comprehensive control system and control method. The system is characterized in that an onshore comprehensive control display and control console is arranged on a shore base as an upper computer, and output of a remote control instruction of an underwater unmanned integrated test platform and real-time monitoring and display of state information in the test platform are completed; a field control cabinet is arranged in the platform to serve as a lower computer, forwarding of remote control instructions, data processing and state information data acquisition of equipment in the test platform are completed, and difficulty in remote control of the underwater unmanned platform and remote transmission of signals underwater is overcome; the system realizes functions of remotely monitoring and controlling the underwater test platform, and has functions of remotely controlling the start and stop of equipment, collecting a state of the equipment, controlling submergence of the test platform and adjusting the posture.

The invention discloses a multi-unmanned aerial vehicle patrol dispatching method based on an optical fiber disturbance monitoring system. The method comprises the following steps: 1) unmanned aerial vehicles and unmanned aerial vehicle base stations are arranged; 2) when an intrusion behavior occurs in the monitoring area, the optical fiber disturbance monitoring system gives an alarm and uploads the alarm data to an optical fiber unmanned aerial vehicle dispatching system; 3) the optical fiber unmanned aerial vehicle dispatching system arranges the unmanned aerial vehicles to go to the scene for on-duty, tracking and shooting according to the position of the alarm point; 4) the on-duty unmanned aerial vehicle returns data to the optical fiber unmanned aerial vehicle dispatching system; 5) the optical fiber unmanned aerial vehicle dispatching system completes prediction of a future intrusion advancing route and outputs the predicted route to the next level; (6) the optical fiber unmanned aerial vehicle dispatching system dispatches the unmanned aerial vehicles to relay on duty until the on-duty personnel go out of police and the unmanned aerial vehicle dispatching system cancels the alarm; and 7) the homeward flight unmanned aerial vehicles are charged for standby. All-weather on-duty of the unmanned aerial vehicles can be achieved, construction is easy and convenient, and the input cost is low.

The invention belongs to foreign object invasion monitoring subsystems, and relates to a railway disaster-prevention foreign object invasion double-optical-network detection subsystem and detection method. The railway disaster-prevention foreign object invasion double-optical-network detection subsystem comprises an optical signal output module, a monitoring point single-mesh double-optical-network and a four-path light detection module. Whether a railway is safe or not is judged by comparing optical signals sent out by an optical signal output plate with optical signals of the monitoring point single-mesh double-optical-network. A disaster-prevention safety monitoring system based on the railway disaster-prevention foreign object invasion double-optical-network detection subsystem is provided. The detection subsystem and detection method solve the problem that an existing foreign object invasion monitoring subsystem is prone to being influenced by transmission distance, crosstalk, circuit loss, lightning and the like to some extent, and further guarantees operation safety of high-speed railways.