186results about How to "Reduce installation and maintenance costs" patented technology

The invention provides an accurate and rapid road violation and parking full-automatic snapshot system. The system comprises a front-end monitoring point part, a network transmission part and a centermanagement unit. The vehicle detection technologies mainly comprise the vehicle dynamic detection technology and the vehicle tracking technology. A matched vehicle tracking method is estimated by utilizing the motion detection method based on time-based motion historical images and feature-point optical flows. In order to achieve a better motion detection effect, a shadow removing method is usedand a moving vehicle is more accurately detected. The multi-feature point optical flow detection tracking mode is adopted, and the tracking accuracy is obviously improved in combination with a vehicleshielding solution. The system is powerful in function and is sufficient to meet the requirements of various application occasions. By adopting the system, the functions of the remote control on a ball machine at a front end monitoring point, the previewing of the video monitoring, the automatic detection of the illegal parking, the automatic identification of license plate numbers, the association of the high-definition video recording with illegal behavior videos, the storage and the browsing of the vehicle information, the system management, the remote maintenance and the like are realized.

The invention provides an idle parking place appointing system and an appointing method wherein the appointing system comprises a cloud platform, an APP mobile terminal, a sentry box terminal and a gate controller. The APP mobile terminal, the sentry box, and the gate controller are connected to the cloud platform through a network so that they are mutually connected through the cloud platform. The APP mobile terminal, through the cloud platform, controls the gate controller to realize the opening of the gate. The appointing method comprises the following steps: publishing information for let by a property owner; appointing a parking place and paying parking fees by a car owner; through the APP mobile terminal to control the opening of the gate, entering the parking lot by the car owner and timed instantly; successfully finding a parking place by the car owner; through the APP mobile terminal to control the gate controller to open the gate, leaving the parking lot by the car owner with the completion of the parking process; and paying fees by the car owner while the property owner earns from the parking place letting. With limited investment yet good effectiveness, the installation and maintenance costs are low. Further, both the system and the method are easy and high efficient to expand and reproduce.

The invention discloses a wireless indoor positioning method capable of automatically learning the distribution of the signal receiving intensity. The theory adopted by the method is that: a wireless signal propagation model and a parameter are taken as an initial distribution curve of the field intensity; in the operating process of a system, a mobile equipment continuously learns a distribution function of the field intensity by the received signal receiving intensity and an EM (expectation maximum) algorithm, and the exact distribution curve of the field intensity is obtained. After the new distribution curve of the field intensity is obtained, the position of the mobile equipment is estimated through adopting an MMSE (minimum mean square error) statistical estimation algorithm. The provided method is characterized in that: the tedious calibrating process of the wireless positioning system is avoided; when the system is changed, the recalibration can be automatically carried out; and the installation and the maintenance costs of the positioning system are greatly reduced. The positioning method is suitable for various indoor positioning systems using wireless signals, such as a wireless local area network, a wireless sensor network, a Bluetooth or mobile phone network, and the like.

The invention discloses a method for positioning a fault disturbance point in a power grid in the technical field of power system measurement and control. The method comprises the following steps of: preprocessing all PMU (Power Management Unit) devices with GPS (Global Position System) time marks; measuring a maximum value of phase voltage, a minimum value of phase voltage, a maximum value of phase current, a minimum value of phase current and corresponding moments corresponding to the maximum and minimal values of the phase voltage and the phase current in any one phase in each power frequency cycle of each node, and sending the measurement data to a power grid control center; judging if the fault disturbance is caused in the power grid by the power grid control center according to the received measurement data, and calculating active power and reactive power of each node when the fault disturbance is not generated in the power grid; otherwise, extracting a voltage disturbance quantity curve of each node, and judging the type of the fault disturbance, and determining the position of the fault disturbance point according to the type of the fault disturbance. The method solves theproblems on calculation of the active power and the reactive power in the stable running state of the power grid, judgment of the type of the fault disturbance in the power grid and positioning of the fault disturbance in the power grid.

The embodiment of the invention discloses a method and system for acquiring passive optical network (PON) element information. The method comprises the following steps that: OLT (Optical Line Terminal) equipment automatically discovers and acquires unregistered ONU (Optical Network Unit) information of the downlink communication connection of PON ports of the OLT equipment, and records the unregistered ONU information; an unregistered ONU acquisition module acquires information of all the PON ports of the OLT equipment according to the IP (Internet Protocol) address of the OLT equipment, acquires the unregistered ONU information of the downlink connection of all the PON ports of the OLT equipment and the uplink port information of the PON ports from the OLT equipment, and stores the IP address of the OLT equipment, the acquired PON port information, the unregistered ONU information under the PON ports and the corresponding uplink port information of the PON ports in a database; and installation and maintenance personnel inquires the installed ONU information, PON port information and uplink port information from the database through a mobile terminal, and compares the obtained information with information of a construction worksheet to determine whether or not the ONU is installed correctly and whether or not the states of corresponding PON ports and uplink ports are normal. According to the embodiment of the invention, the information inquiry speed and the installation testing speed of each PON network element can be increased.

The invention provides a road safe driving assistance system. The system includes: a vehicle control module which is configured to acquire a slippery index of a current road, the type of the current road section and traffic control conditions; acquiring the current vehicle driving state; based on the slippery index of the current road, the type of the current road section and traffic control conditions and the current vehicle driving state, generating and providing driving suggestions or driving assistance command; and presenting the driving suggestions to a driver, or transmitting the drivingassistance command to an onboard executor for execution.

The invention discloses a passive wireless temperature crack binary sensor array based on a microstrip antenna. The passive wireless temperature crack binary sensor array comprises a signal transceiving patch antenna and a measuring patch antenna array. The measuring patch antenna array comprises a crack monitoring array element and a temperature monitoring array element and is connected with thesignal transceiving patch antenna through delay transmission feeder lines with different lengths; and the signal transceiving patch antenna is in data communication with external equipment. The influence of the environment temperature on the monitoring performance of the crack sensor is eliminated, and the working reliability of the microstrip antenna sensor is greatly improved.

The invention provides a novel safety gear and an elevator falling-preventing device. According to the novel safety gear, upper and lower guide wheels are additionally arranged in an existing safety gear structure, and therefore safety gear misoperation is avoided during normal elevator operation. The elevator falling-preventing device comprises a first flexible component and the novel safety gear which are combined for use or further comprises a guide rail and a second flexible component which are installed in a matched mode. By means of the structure, elevator safety is improved, impact force of the safety gear acting process on a car, the guide rail, a guide rail support and a well enclosure is lowered, the elevator car is directly hung on an upper beam through a flexible force bearing component after being stopped, the hidden danger that the guide rail, the guide rail support and the well enclosure are loosened and disengaged is eliminated, the possibility that elevator passengers are injured is greatly lowered, and the installation and maintenance cost is reduced.

The invention relates to a train positioning device and method. The positioning device comprises a kilometer signboard, a train top camera, a train side face camera and a background server; the kilometer signboard is mounted next to a line track; the train top camera is mounted on the top of a train head of a train, and the train side face camera is mounted on the side face of the train head of the train; and the background server is connected with the train top camera and the train side face camera. Compared with the prior art, based on a convolutional neural network, the train position is determined through image recognition, meanwhile, the train position can be corrected by being matched with an odometer, and the train positioning device is low in mounting and maintenance cost, and hassuperior accuracy and robustness.

The invention provides a method for improving the photovoltaic conversion efficiency of a solar photovoltaic power generation panel, comprising: using an EVA adhesive film to bond a composite metamaterial film to the light-receiving surface of a solar photovoltaic power generation panel; the composite metamaterial film is prepared by the following method : Micron-sized SiO 2 The microspheres are dispersed in the dispersant and ultrasonically oscillated to obtain SiO 2 microsphere dispersion; make SiO 2 The microsphere dispersion is evenly distributed on the polymethylpentene film, so that the SiO 2 The microsphere dispersion is volatilized, and the distribution of SiO 2 Polymethylpentene thin film of microspheres; using rolling machine to distribute SiO 2 The polymethylpentene film of the microspheres was rolled to obtain the composite metamaterial film. The invention utilizes the principle of radiation cooling to significantly reduce the surface temperature of the solar photovoltaic power generation panel, thereby improving the photovoltaic conversion efficiency of the solar photovoltaic power generation panel, and also has the advantages of low energy consumption, high efficiency and simple structure.

The invention aims to provide a traffic control method and device. A wide-area microwave radar is adopted, multi-lane and wide-range traffic information of each phase of intelligent traffic control can be obtained, the method is not affected by environment or weather, large-area laying is not needed, and the installation and maintenance cost is low. The traffic flow of each lane and the traffic flow of each phase can be balanced by using an equisaturation control mechanism, and the phase saturation degree of each phase is controlled to be within an idea range; an adaptive control method can sufficiently coordinate traffic requirements between the phases, the green light duration is fully utilized, and then adaptive control over traffic circulation is achieved.

The invention discloses a tooth row positioning device. The device is characterized by comprising a chain positioning block, an adjusting screw, a chain, a connecting block, a tooth row body, a post-positioning swing rod, and a positioning roller, wherein the connecting block is connected with the chain; the chain positioning block is fixed on a fixing part; the positioning roller is a roller on a chain link of the connecting block; the two ends of the tooth row body are fixedly connected on the connecting block respectively; the post-positioning swinging rod is a symmetric part; and the adjusting screw is arranged on the chain positioning block. A working method comprises the following steps of: positioning the tooth row body at a processing position; rotating the post-positioning swinging rod counterclockwise; lifting the tooth row body and the connecting body; after finishing positioning, starting processing paper; after finishing processing, rotating the post-positioning swing rodclockwise; descending the tooth row body and the connecting block; and after separating completely, positioning the tooth row body to a next position. The device has the following advantages: solution of the problem of chain stretching of equipment after printing, improvement on the precision stability of the equipment after printing, simple structure, reduction of space occupation, reduction of maintenance installation cost and improvement on work efficiency.

The invention discloses a radiation source control method. The method includes the steps of obtaining a detector signal through a radiation beam detector after a radiation source starts to transmit a first radiation beam to scan a detected object, conducting image recognition on the detector signal through an image recognition algorithm so that whether the current scanning position is the boundary position of the detected object or not, and controlling the radiation source to start to transmit a second radiation beam when detecting that the current scanning position is the boundary position of the detected object. The invention further discloses a rapid pass type security check system. By means of the radiation source control method and the rapid pass type security check system, the boundary position of a vehicle cab and a goods area can be accurately and rapidly judged.

The invention discloses an intelligent wellhead sealing device. The device comprises a floating double-sealing device and a set of hydraulic energy storage and reinforcement system capable of compensating pressure; the floating double-sealing device comprises a shell and an annular sealing sleeve; a 360-degree sliding groove is formed in the top end of the shell; an annular sealing sleeve is fixedly installed in an inner cavity of the shell through a first supporting ring and a second supporting ring; the annular sealing sleeve is composed of a straight cylinder connecting sleeve and at leastone annular high-pressure sealing cavity; a floating packing box capable of horizontally floating in a sliding groove in the top end of the shell is installed at the upper end of the straight cylinderconnecting sleeve on the upper portion of the annular sealing sleeve; packing is installed in the floating packing box; an elastic pressing plate and a packing locking cap are installed on the packing; a polished rod of an oil pumping unit is installed in the annular sealing sleeve; the upper end of the polished rod of the oil pumping unit sequentially penetrates through the floating packing box,the packing, the elastic pressing plate and the packing locking cap; and the lower portion of the shell is connected with the hydraulic energy storage reinforcement system communicating with the high-pressure sealing cavity. An eccentric wear problem generated in 90% or more of oil wells is solved, and the service life of the oil pumping unit is prolonged.

The invention, which belongs to the technical field of medical ultrasonic detection and treatment, provides a wearable medical ultrasonic therapeutic apparatus and an acoustic emission array positioning and acoustic beam focusing method. Using the apparatus and method provided by the invention, problems of difficulty existing fixation equipment installation and maintenance and limited focusing region can be solved. The method comprises the following steps: step one, designing a head-mounted device, a limb-mounted device, and a trunk-mounted device, calculating equipment attitude information, and storing the information in a table manner for convenient FPGA invoking; step two, selecting one device, installing the device, and adjusting an attitude device to prevent dead angle generation; step three, operating the device, collecting magnetic positioning device information on an array, calculating a spatial attitude of the array, and carrying out positioning to determine coverage of a therapeutic region by the device; step four, determining a therapeutic focusing center, looking up the table and carrying out calculation, adjusting the attitude position and an ultrasonic array emission time delay, and forming a focusing center; and step five, with a B type ultrasonic detection, feeding back the focusing position information in real time, carrying out closed-loop feedback adjustment, and correcting a focusing position attitude error.

The invention discloses a reverse vehicle tracking system and a parking lot management system and relates to the field of intelligent vehicle tracking. The reverse vehicle tracking system comprises avehicle tracking robot, a background server and a vehicle inquire terminal, wherein the vehicle tracking robot comprises a vehicle component and a control acquisition component, the control acquisition component comprises a control module, an information acquisition module and a locating and obstacle avoidance module, the control module detects position information of the vehicle tracking robot based on the locating and obstacle avoidance module and controls the vehicle component, so as to control the vehicle tracking robot to go on patrol, the information acquisition module acquires vehicle information of a vehicle, sends the vehicle information to the control module when the information acquisition module acquires the vehicle information and sends the vehicle information to the background server to be stored, and the vehicle inquire terminal is used for responding to a user operation and acquiring vehicle locating information corresponding to a target vehicle from the background server. The reverse vehicle tracking system disclosed by the invention has the advantages that mounting and maintenance cost is low, mounting is flexible, functions are diversified, and initiative vehicletracking can be completed.

The invention discloses an adaptive adjusting method and system for a co-driver seat. The adjusting method comprises the steps that after it is judged that someone is at a boss position behind a co-driver, when it is judged that the co-driver does not operate, a co-driver door is closed, no person is in the co-driver position, and the seat position of the co-driver seat is not located at the forward limit position, co-driver position operation is executed, and otherwise, the adaptive adjusting process is quitted; and in the process of executing the co-driver position operation and after execution is completed, whether the co-driver operates or not, whether the co-driver door is opened or not and whether a person is in the co-driver position or not are continuously judged at the same time.The adjusting system comprises a detection module, a controller and an executing mechanism. By detecting the seat state information of the co-driver position and the boss position, the personnel riding information and the co-driver position door state information, the front-back horizontal position adjustment of the co-driver seat and the front-back turnover position of the seat backrest are automatically adjusted, the front-back row riding space is adjusted in an adaptive mode, and the space requirements of front-back row passengers are met to the maximum extent.

The invention relates to a water heater and an electric leakage and dry burning preventing detection method of the water heater. The water heater comprises an inner container, a heating pipe, a pipe joint and a control unit, wherein the heating pipe is installed in the inner container through a heating tube flange, the pipe joint comprises an insulating piece and two metal pieces which are embedded in the insulating piece and are mutually insulated, the metal pieces which are arranged in the pipe joint and connected with the inner container are provided with conductive components, and the conductive components are led out from the insulating piece and are electrically connected with a current or voltage detection circuit in the control unit. Therefore, detection for whether electric leakage of the water heater exists can be achieved by means of the conductive components on the metal pieces contacted with the inner container, an achieving mode is simple, as long as electric leakage exists, timely alarming can be achieved, and safety and reliability are strong. Meanwhile, by means of judging whether the conductive components and conductive components on the heating tube flange are in a conductive state, whether the water heater is in a dry burning state can be judged, electrodes are not needed to be arranged inside the inner container, and structural design is simple, installation and maintenance are convenient, and cost is saved.

The invention discloses a slaughtering device which comprises a base, a driving mechanism and an imprisoning tank. The imprisoning tank comprises a first rotating table, a second rotating table, a first splint, a second splint, a top cover, a bottom plate and a neck pressure plate; the first rotating table is provided with a neck clamping mechanism and a turnover mechanism; the neck clamping mechanism comprises a neck clamping door and a neck clamping cylinder; the upper part of the neck clamping door is provided with a neck placement concave cavity and the neck placement concave cavity is in slide fit with two parallel guide rails arranged on the first rotating table; the turnover mechanism comprises a fixture and a fixture cylinder; the neck pressure plate is positioned above the first rotating table and the length direction of the neck pressure plate is vertical to the moving direction of the neck clamping door; the driving mechanism comprises a transmission shaft; both a first chain and a second chain are in transmission connection with the transmission shaft; and the transmission shaft is also sequentially connected with a speed reducer and a motor. The slaughtering device provided by the invention has a simple structure and high slaughtering efficiency; labor intensity and cost of workers can be reduced; and the slaughtering device has a high safety coefficient and long service life and is also beneficial for showing live killing and ensuring meat quality of beasts.

The invention discloses a clothing production line, belonging to the technical field of clothing machinery. The clothing production line is characterized by comprising a rack, a pair of transmission mechanisms, a pair of lifting mechanism, a support plate and turnover baskets, wherein the rack is divided into an upper layer and a lower layer; the pair of transmission mechanisms is mounted at one end along the length direction of the upper layer of the rack and the other end along the length direction of the lower layer of the rack respectively; the support plate is arranged on the upper and lower layers of the rack and located on the heading direction of a push rod of the pair of transmission mechanisms; multiple turnover baskets are densely arranged on the support plate; the pair of lifting mechanisms is arranged at the two ends along the length direction of the rack respectively and located on the inner side of the pair of transmission mechanisms; the turnover baskets connected with the upper and lower layers of support plates are conveyed through the up-down movement of a lifting platform on the pair of lifting mechanisms; the lifting platform at the lowest position has the same height as the support plate on the lower layer of the rack; and the lifting platform at the highest position has the same height as the support plate on the upper layer of the rack. The clothing production line disclosed by the invention is relatively low in the mounting and maintenance cost, has good transmission effect and strong generality, and is easy to popularize in various clothing enterprises.

The invention discloses a multi-rotor wind power generation system with equal beam length, which comprises a lower pylon 1, a rotary bearing 3, windmills, an upper pylon 2, a rope and / or a rod 8, beams 6 and a tail vane 7, wherein the rotary bearing is arranged between the upper pylon and the lower pylon; two sides of the upper pylon are respectively connected with one ends of the beams; the outer end of the uppermost beam is connected with the top end of the upper pylon through the rope and / or the rod; the outer ends of adjacent beams are connected through the rope and / or the rod; the lengths of the beams at two sides of the upper pylon are equal; the windmills are fixedly connected with the top of the upper pylon or / and the beams; the number of the windmills on the beams at one side is greater than that of the windmills on the beams at the other side; and the tail vane is connected with the upper pylon, the beams or / and an engine room through a pin roll. The multi-rotor wind power generation system has the advantages of long service life of the vane, small occupied area, low cost for installation and maintenance, favorable reliability, wide application range, low bearing stress, automatic wind resistance and yawing and small stress of the beams; and the rotary bearing or a rotary driving device in the engine room is omitted.

The invention provides a storage virtualization system. The storage virtualization system comprises servers, local disks, a Raid card, Raid disk arrays, virtual disks and distributed head cards, wherein the servers are used for providing software operating environments and a virtual machine control platform for a virtual machine and are provided with all-in-one machine managing units; a virtual Raid array is formed by local disks of all the servers through the Raid card by the all-in-one machine managing units; and a Raid disk array is formed by the local disks through an ISCSI (Internet Small Computer System Interface) channel by the Raid card, and a virtual memory is formed by the plurality of virtual Raid arrays through a network. According to the storage virtualization system provided by the invention, the problem of the shared storage in the conventional low-cost desktop virtualization scheme is solved, the high-reliability functions of the virtual HR (Human Resource) are realized, the shared storage is disaffiliated, and the stability and the reliability of a desktop are achieved; and meanwhile, the installation and maintenance cost of the system is lowered as well.

The invention discloses a multi-rotor wind generating system with fixing rods. The multi-rotor wind generating system comprises a lower tower 1, a rotary driving device 3, wind turbines, an upper tower 2, beams 6, a cabin frame 7 and inner fixing rods 8; the rotary driving device is arranged between the upper tower and the lower tower; beams positioned on two sides of the upper tower are fixedly connected to the upper tower through one end of each beam; one end of each inner fixing rod is connected with the middle part of each beam, and the other end of each inner fixing rod is connected with the upper tower; the cabin frame is arranged on the upper tower; the wind turbines are arranged on the top of the upper tower, the beams or / and the cabin frame; each wind turbine comprises a wind wheel 4 and a cabin 5; and 2 to 100 wind turbines are arranged. The multi-rotor wind generating system with the fixing rods have the advantages that: blades have long service life, the occupied area is small, installation and maintenance cost is effectively reduced, the maintenance cost is low, the reliability of the system is high, the application range is wide, a slewing bearing or a rotary driving device in the cabin is eliminated, and the beams bear small force.

The present invention belongs to a control bin for visual inspection, and is used for the graphics acquisition processing and detection of products in a production line. The device comprises an integrated control cabinet, a smart camera stand and a dual camera intelligent camera, wherein the three parts enables integrated moving. The dual camera intelligent camera obtains image information, and transmits the information to the control cabinet through an interface line for image processing and analysis, and the image is finally displayed on the display. The control cabinet comprises a visual controller, a display, and a control cabinet body keyboard device, so as to achieve image processing and displaying functions. The smart camera stand comprises a rack and pinion mechanism, a hinge mechanism and a ball joint structure, to achieve the adjustment of shooting location and direction of the intelligent camera. The device has the characteristics of high reliability, sensitive brake reaction, less number of the reducing mechanisms and less occupied space.

The invention provides a line loss monitoring device which comprises a plurality of collecting terminals and a monitoring terminal, wherein each of the collecting terminals comprises a single chip microcomputer which drives an electric quantity collector through a drive circuit and is connected with a wireless transmitting module and a timer; the monitoring terminal comprises a wireless receiving module and a central processing unit; the collecting terminals and the monitoring terminal are in data communication through a wireless network. The line loss monitoring device provided by the invention not only is relatively low in cost and relatively wide in application range, but also can be used for immediately and accurately acquiring the line loss condition and data in a monitoring field so as to accomplish immediate repair and stop problems or behaviors which affect the line loss in an assistant manner. The line loss monitoring device further can be used for accumulating the line loss data in an actual electric power supply process, thereby providing support for normalizing the line loss numerical value.

The invention provides a capillary network and air conditioner parallel indoor temperature control system and belongs to the field of indoor temperature control. The system is characterized in that the user back-home time and the indoor temperature and humidity information are set through an intelligent terminal and are transmitted to a server; the set information is received by the server, and the information is transmitted to a control unit; after the set information is received by the control unit, the an indoor unit, an outdoor unit and a capillary network circuit are controlled by the control unit for start at the set user back-home time, when the outdoor unit and / or the indoor unit and / or the capillary network circuit are started, a detection unit is controlled for starting detectingthe temperature and humidity information of the indoor air, the detected temperature and humidity information of the indoor air is transmitted to the control unit, the control unit selectively activates the air conditioner to enter a corresponding mode according to difference between the set indoor temperature and humidity information and the detected temperature and humidity information of the indoor air, and the outdoor unit and / or indoor unit and / or the capillary network circuit are controlled for operation.

The invention discloses an inverted hanging type wave energy generation device and an optimal capturing method thereof. Wave energy is captured through a cylinder floater. A rotor of a linear motor isdriven by a crank connecting rod and a change wheel in a speed raising mode so as to generate electricity, and the wave energy capture power is adjusted by means of an uncontrollable rectifier and aBOOST converter. Wave energy capturing is improved by adopting the collaborative optimal capturing method including capturing control stabilization optimization and capturing control disturbance optimization. Wave energy feature extraction is achieved based on omnibearing collection of sixteen buoys internally comprising accelerometers and gyroscopes. Capturing control stabilization optimization is achieved on the basis of collaborative optimization of a cylinder floater dynamic model and effective output power of a linear generator. Capturing control disturbance optimization is achieved by disturbance adjustment of parameters of a controller based on steady-state optimization of the controller in combination with on-line optimization of the output power of the generator. The inverted hanging type installing and optimal capturing method greatly lowers the sealing and corrosion prevention requirements of equipment, and greatly improves wave energy capturing power.

The invention discloses a multi-rotor wind generating system capable of automatically facing wind. The multi-rotor wind generating system comprises a tower, wind turbines, an A slewing bearing 2, a B slewing bearing 3, a framework 4, beams 5 and tail vanes 8; the A slewing bearing is arranged on the top of the tower; the B slewing bearing is arranged in the middle of the tower; inner rings of theA slewing bearing and the B slewing bearing are fixed on the tower; outer rings of the A slewing bearing and the B slewing bearing are connected with the framework; one end of each beam is connected with the framework; the wind turbines are fixedly connected with the beams; each wind turbine comprises a wind wheel 6 and a cabin 7; 2 to 100 wind turbines are arranged; the lengths of the beams on two sides of the framework are different; the longer beams are provided with more wind turbines than the shorter beams; the tail vanes are connected with the framework, the beams or / and cabins through pin rolls. The multi-rotor wind generating system capable of automatically facing wind has the advantages that: blades have long service life, the occupied area is small, installation and maintenance cost is low, the reliability is high, the application range is wide, a slewing bearing or a rotary driving device in the cabin is eliminated, and the automatic wind facing and yawing are realized.

The invention discloses a multi-rotor wind power generation system with a tail vane, which comprises a lower pylon 1, a rotary bearing 3, windmills, an upper pylon 2, beams 6 and the tail vane 7, wherein the rotary bearing is arranged between the upper pylon and the lower pylon; one end of each beam is fixedly connected with the upper pylon; the windmills are fixedly connected with the top of theupper pylon or / and the beams; each windmill comprises a wind wheel 4 and an engine room 5; the number of the windmills is 2 to 100; the lengths of the beams at two sides of the upper pylon are unequal; the number of the windmills on the beams at one side of the upper pylon is 1 to 20 more than that of the windmills on the beams at the other side of the upper pylon; and the tail vane is connected with the upper pylon, the beams or / and the engine room through a pin roll. The multi-rotor wind power generation system has the advantages of long service life of the vane, small occupied area, low cost for installation and maintenance, favorable reliability, wide application range, automatic wind resistance and yawing and safe protection; and the rotary bearing or a rotary driving device in the engine room is omitted.

The invention discloses a strain crack decoupling measurement sensor based on a multi-layer microstrip antenna. The strain crack decoupling measurement sensor combines a multi-layer structure with a microstrip antenna sensor and comprises a multi-layer measurement patch antenna and a signal transceiving patch antenna, wherein the multi-layer measurement patch antenna comprises a crack measurementpatch and a strain measurement patch, and is connected with the signal transceiving patch antenna through feeder line structures with different sizes, and the signal transceiving patch antenna is in data communication with external equipment through a horn antenna, a two-way power divider and a filter. According to the invention, the strain test and the crack test are arranged in the same area, the crack test can be subjected to micro compensation through the strain measurement value, and compared with the mode that in the prior art, strain measurement and crack measurement are arranged in a partitioned mode, and the influence of structural strain on crack measurement is neglected, a more accurate crack monitoring decoupling value can be obtained.