334results about How to "Fix fixity" patented technology

The invention relates to a wireless image transmission communication system for an unmanned aerial vehicle and a wireless image transmission communication method. The wireless image transmission communication system comprises a digital camera, a control module and a power module, and is characterized in that the wireless image transmission communication system further comprises a wireless communication module for real-time data transmission with a ground monitoring center, the wireless communication module comprises a reconfigurable high-speed digital modulation unit and a digital transmission transmitter, the reconfigurable high-speed digital modulation unit is used for selecting a digital modulation mode to digitally modulate serial data stream according to the modulation mode of a remote control command of the ground monitoring center, the digital transmission transmitter is used for transmitting data by the aid of microwaves, and the reconfigurable high-speed digital modulation unit comprises a series-to-parallel portion, a sampling control portion and a carrier wave multiplication portion. By adding the reconfigurable multi-mode modulator, modulation modes can be changed in an online manner according to the quality of a signal channel environment, and high-resolution image data can be transmitted in real time even in a severe transmission environment.

The invention discloses a construction method of a high-tension water-rich extra-large-section weak breccia tunnel. The method includes the steps of exploring distribution of fault weak breccia in front of a tunnel face by an advanced geological forecast method; distributing L-shaped gradient drain holes in two inner sides of the tunnel, providing sector drain holes and grouting holes, and allowing upper grouting and lower drainage; providing a combined cylinder grout-stopping wall, and performing a full-face advanced chemical grouting consolidation; constructing an advanced long tube shed with a circumferential closed advanced tube shed guide wall having a foundation, distributing tapered quincunx examining drain holes to detect grouting effect, and finally excavating the tunnel. Through the use of the techniques such as three-layer stereoscopic grouting and drainage, and cement-water glass and epoxy resin sequential grouting, the problem that a high-tension water-rich surrounding rock area with loose weak breccia has ineffective grouting consolidation and non-obvious water plugging effect is solved.

The invention relates to a damping joint for an external bone fixator and a regulating type bionic external bone fixator. The damping joint for the external bone fixator comprises a damping joint head A, a damping joint head B, a damping joint pin shaft, a gasket groove, a butterfly gasket, a U-shaped fixing clip and a gasket cover, wherein the damping joint head A comprises a spherical damping joint hinge seat and a threaded damping joint connector A arranged on the spherical damping joint hinge seat, the damping joint head B comprises a damping joint hinge plate and a threaded damping joint connector B arranged on the damping joint hinge plate, the damping joint hinge plate is connected with the spherical damping joint hinge seat through the damping joint pin shaft, and the diameter of the damping joint hinge plate is smaller than the diameter of the spherical damping joint hinge seat. The regulating type bionic external bone fixator with the damping joint has the advantages of simple structure, light weight, low cost, regulating capability and flexible operation, and targeted and personalized combination and regulation can be realized.

The invention discloses a recyclable installation device of a microseism sensor and an installation method. The installation device includes a base, installation rods, an injection pipe, a rubber ring and a double sleeve. During installation, the microseism sensor is placed outside an installation hole. The microseism sensor is connected and fixed with the steel base through the installation rods and the double sleeve. The base is coupled with a rock body through cement mortar. Microseism signals are spread to the microseism sensor by the steel base through the installation rods. During recycling, screws on the double sleeve are screwed outside the installation hole so that the microseism sensor is recycled and the installation rods are rotated and pulled out outside the installation hole for recycling. The recyclable installation device of the microseism sensor and the installation method solve a problem that a microseism sensor is difficult to fix, maintain, protect and retract and are capable of receiving and acquiring vibration signals near any position and at the same time, positioning precision of a microseism source is ensured and the cost of microseism monitoring is saved. The recyclable installation device of the microseism sensor and the installation method are widely applicable to microseism monitoring of projects such as underground workshops, tunnels, slopes and roadways and the like.

The invention relates to an interventional measurement node which is used for self-organized network and comprises an application level processing module, a UDP processing module and an IP processing module. The interventional measurement node is a network node which can route and exchange data for other nodes and has measurement capability. The measurement node can process and redirect the data of other nodes, can response to the measurement request initiated by other nodes and can help to collect the constantly changeable routes or other information in network to help people to understand the transient state and the normal state of network topology. When being the intermediate node of the network, the interventional measurement node can adopt three transmission modes for data message according to IP elective contents: direct forwarding, copy forwarding and process forwarding, thus causing the intermediate node to receive the message. The interventional measurement node uses the executive mechanism of the application level processing module to execute measurement tasks and acquire the support of the network/an operating system and collects network performance information of the intermediate node, then the network performance information is added to the message to be transmitted to a destination node, so the interventional measurement of the self-organized network is completed.

The invention belongs to the field of bridge construction, in and particularly relates to a bored pile platform construction method on covering-free steep bare rock in deepwater and rapid stream. A specific scheme of the invention is as follows: the bored pile platform construction method comprises the following steps of: building a frame-type platform at the downstream side of a trestle bridge, wherein the frame-type platform is supported by a plurality of steel pipe piles, and the steel pipe piles are anchored inside the steep bare rock surface by adopting an anchor bolt grouting and rock-socketing technology; setting off a steel casing to the steep bare rock surface in a limiting manner by a guide frame arranged on the frame-type platform, and casting underwater concrete in the steel casing till the underwater concrete is filled in the bottom of the steel casing and the interior of a steel enclosure to form a stable underwater cofferdam; and then, carrying finishing subsequent construction of a bored pile. The bored pile platform construction method disclosed by the invention has the advantages of reducing the deep diving operation load and the construction risk by adopting an underwater exploration technology, enabling the steel pipe piles to be firmly anchored on the steep bare rock surface by adopting the anchor bolt grouting and rock-socketing technology and solving the technical problems of fixing a bottom opening of the steel casing of the bored pile and grout leakage in the boring process due to the adoption of the steel cofferdam at the bottom of the steel casing.

The invention discloses an extraction algorithm of self-adapting intersection regions of strokes of Chinese characters, and belongs to the technical field of mode recognition and information processing. The extraction algorithm mainly comprises the following steps that (1) a skeleton diagram of a Chinese character image is calculated, (2) intersections are calculated, (3) the intersections are merged, (4) PBOD of the intersections is calculated, (5) break points are calculated according to a PBOD histogram, and (6) the break points are connected to obtain the self-adapting intersection regions. The break points corresponding to the intersections are extracted dynamically, the stroke intersection regions suitable for different thicknesses of the strokes and stroke intersection regions in different shapes are obtained, and the problem existing in extraction of intersection regions in fixed size and fixed shape is solved.

The invention provides a reversible multi-station vacuum-suction bench which comprises a bottom plate, a power device, a slicer, a turnplate, vacuum breakers and vacuum suction fixtures. The power device and the slicer are fixed on the bottom plate. The turnplate is disposed on the slicer. One vacuum breaker and one vacuum suction fixture are disposed on each station on the turnplate. The turnplate is provided with at least two stations. The slicer is driven by the power device. The reversible multi-station vacuum-suction bench further comprises a plurality of proximity switches as many as the stations. The reversible multi-station vacuum-suction bench has the advantages that the problem that part of work pieces cannot be positioned and fixed in the mechanical manner is effectively solved, vacuum generator on the vacuum breakers and an air pipe and a lead of a power-off switch pass through the center of the rotary bench, reversible rotation causes no damage, long-term stable operation of the bench can be guaranteed, the control way of reversible rotation of the bench is simple, and vacuum generation control is convenient.

The invention provides a mouse mouth and nose exposed holder for use in a breathing test. The device comprises a holder main body consisting of a mouse heal container and a mouse body container, a pushing board with a fixed bolt for pushing and fixing a mouse body conveniently in a slideway of the holder main body, a support at the bottom of the holder main body for stably holding the holder main body, a shit collecting tank which can be placed between the support and the holder main body conveniently for receiving the shit of the mouse in a test period, and two fixed claws on the outer side of the mouse head container for conveniently fixing the holder on the wall of a breathing test bin. The invention has the advantages that: the holder can fix the body of a mouse-like animal by the pushing board with the fixed bolt conveniently, with the mouth and nose part of the animal exposed for performing the breathing test; and a difficult mouse-like animal fixing problem in the conventional breathing experiment is solved. The support of the holder is used for holding the holder main body stably, so the rolling and inconvenient holding problems of a cylindrical holder main body are solved. The shit collecting tank can be placed in the slideway between the support and the holder main body conveniently for receiving the shit of the mouse in the test period, so the problem of pollution by animal excretion is solved. The special fixing claws of the invention can fix the holder on the wall of the breathing test bin conveniently without any bracket, so the fixing problem of the holder is solved conveniently.

A real-time planning method of a moving coordinate system maneuvering target by a spacecraft comprises the steps of: performing conventional attitude maneuvering planning initialization calculation, and obtaining an initial quaternion and a maneuvering planning parameter of a target moving coordinate system relative to a satellite orbit system; performing real-time planning pre-calculation of theconventional attitude maneuvering planning according to the maneuvering planning parameter information in each control cycle, and obtaining a pre-calculation result; and finally, calculating an attitude quaternion of real-time planning relative to an inertial system and an angular speed of real-time planning relative to the inertial system according to a real-time direction cosine matrix of the target moving coordinate system relative to an orbit system and the angular speed of the target moving coordinate system relative to the inertial system in each control cycle in the maneuvering process,and completing the moving coordinate system maneuvering target real-time planning by the spacecraft.

The invention provides a simulation testing device and method achieving cable fault simulation through a wireless network, and belongs to the field of cable fault testing equipment. The simulation testing device is characterized by comprising a cable fault simulation arrangement cabinet, a cable fault simulation distance measuring instrument, a wireless router and a host, wherein the host is a computer provided with cable fault waveform simulation software, the host, the cable fault simulation arrangement cabinet and the cable fault simulation distance measuring instrument are connected with the wireless router at the same time, and information transmission is achieved through the wireless router. Compared with the prior art, the simulation testing device has the advantages that a great amount of wiring is avoided, faults are simulated through the cable fault simulation arrangement cabinet, a long-distance cable is eliminated, meanwhile a real on-site environment can be simulated, and the fact that training staff are trained to quickly and skillfully grasp the cable fault testing technology is facilitated.

The invention relates to an electromagnetic resonator-based two-dimensional luneberg lens and belongs to the technical field of microwaves. The electromagnetic resonator-based two-dimensional luneberglens comprises n layers of concentric electromagnetic resonator unit modules, wherein each layer of electromagnetic resonator unit module is a circle formed by a plurality of electromagnetic resonator units with the same structure; and each electromagnetic resonator unit comprises a dielectric layer and an etching pattern layer, a metal copper material is adopted by the etching pattern layer andthe etching pattern layer is laminated on the dielectric layer; and the etching pattern layers of the electromagnetic resonator units in different layers of electromagnetic resonator unit modules arethe same in pattern and different in pattern size, and the dielectric layers are identical. The two-dimensional luneberg lens is arranged in a waveguide structure, horizontally polarized electromagnetic waves enter in parallel along one side of the two-dimensional luneberg lens, and an electromagnetic wave convergence effect can be obtained in the 180-degree direction of the incident waves. The electromagnetic resonator-based two-dimensional luneberg lens is achieved through a PCB processing technology, has the characteristics of being easy to process, low in cost and high in repeatability, and can be widely applied to a DOA estimation technology and an antenna beam convergence scene.

The invention discloses a rotary type erosion wearing electrochemical corrosion testing device. The rotary type erosion wearing electrochemical corrosion testing device comprises a water tank, a slurry tank, a test sample, a rotary motor, a work electrode column, an auxiliary electrode, a rubber hose, a three way valve, a beaker, a reference electrode, a cover plate, a rotation shaft, a mixing impeller, a stand pillar, a motor control cabinet, a constant potential current analyzer and a circulating water system. The rotary type erosion wearing electrochemical corrosion testing device solves the problem that electrodes are easy to damage and deform during the erosion wearing process by designing an erosion wearing resistance protection mode for a work electrode, the reference electrode and the auxiliary electrode, performs an electrochemical corrosion test by connecting the three electrodes with the external constant potential current analyzer through guide wires, and draws an electrochemical erosion curve of the test sample during the erosion wearing process through a computer. The rotary type erosion wearing electrochemical corrosion testing device can simulate actual work conditions of erosion wearing, specially can accurately analyze and test a real situation of pure erosion amount during the erosion wearing process and influences of the pure erosion amount on a test sample material erosion wearing rule, and can be used in a site test in a real industrial environment.

The invention belongs to the field of medical materials and particularly relates to a functional wound surface repairing material and a preparation method thereof. The wound surface repairing material is prepared by compounding 7-14 parts of bioactive glass, 0.5-0.7 part of silver nitrate, 0.2-0.6 part of antibiotics, 15-25 parts of degradable polymer and 80-160 parts of deionized water. The functional wound surface repairing material is loaded with silver ions and antibiotics, wherein the silver ions and the antibiotics respectively have bactericidal performance, and the silver ions can enable the antibiotics to more easily enter bacteria to exert synergistic action by increasing the generation of oxygen free radicals and increasing the permeability of bacterial membranes, so that the functional wound surface repairing material has relatively strong antibacterial performance and can solve the problem that bacteria are easy to adhere to the existing wound surface repairing material to cause infection and then the curative effect is not ideal.

The invention relates to a two-dimensional code self-help washing machine, comprising a sealed two-dimensional code control box body and a washing machine body, wherein a reading head in contact with the outside is arranged on the front side of the two-dimensional code box body, and is connected with a circuit board which is fixed on the rear side through an electric wire; a processor is arranged on the circuit board; a clearance for controlling a focus distance is formed between the reading head and the circuit board; the circuit in the two-dimensional code control box body is connected with the circuit in the washing machine body; and the two-dimensional code control box body is fixed on the washing machine body. The two-dimensional code self-help washing machine is convenient to use, the cost is reduced, the washing efficiency is improved, and the like.

The invention relates to a sea fracturing method. The method includes firstly performing fracturing geological design; mounting a fracturing wellhead, and mounting a fracturing wellhead high-pressure pipeline and connecting to a high pressure hose; loading fracturing equipment, suspending the fracturing equipment to a deck and fixing, concentrating the fluid container area, arranging a fluid feeding pump, a sand container, a sand mixing pump pry, a high-pressure injecting pump unit, a high pressure pipeline assembly and the like sequentially behind, preparing water, feeding material and preparing fracturing fluid; after a fracture construction ship arrives at a platform, adopting a tail laying manner, mooring, connecting to the high pressure hose at the gunwale of the platform, starting all high pressure injection pumps, inspecting circularly, and performing the pipeline pressure test; performing fracture construction according to the designed pump injection progress after the pressure test is qualified. The high pressure pipeline assembly is an assembly connected the high pressure injection pumps and high pressure injection pipeline, and the high pressure injection pumps are power equipment injecting fracture fluid into oil pipes through the high pressure pipeline assembly and the high pressure pipeline. The method is applied to oil testing and fracturing construction of sea exploration and development wells.

The invention discloses a cutter device of a decorative plate production line, which comprises a supporting base. A conveying assembly is arranged at the top of the supporting base. A portal frame iswelded to the right side of the top of the supporting base, a laser cutter is fixedly arranged at the top of an inner cavity of the portal frame, electric air cylinders are fixedly connected to the bottoms of the front side and the rear side of the portal frame, and the telescopic ends of the electric air cylinders penetrate through the portal frame and extend into the inner cavity of the portal frame. The conveying assembly is arranged for conveying the plate, the electric air cylinder is arranged to drive the clamping plate to move, the plate is fixed in advance when being broken, a threadedrod is arranged to rotate in the supporting frame, a slider slides in the sliding groove, the distance between the opposite views of the guide wheels is adjusted, meanwhile, the guide effect is achieved, the problems that existing equipment does not have the guide function during plate conveying and cannot be pre-fixed during breaking are solved, therefore, plates are not prone to deviating, andthe breaking accuracy is improved.

The invention relates to an auxiliary device for hip joint replacement operation. The device comprises a bedstead and a bed plate, wherein the middle part of the top end of the bedstead is provided with a buttocks-supporting plate which can move back and forth and lift; the left and right sides of the bedstead are respectively and slidably connected to sliding plates capable of sliding forwards and backwards, the top end of each sliding plate is hinged to a working plate, the bottom of each working plate is provided with leg supporting rods with adjustable height, the inner sides of the working plates are provided with jacking plates capable of moving leftwards and rightwards and inclining forwards and backwards, and the top end of each jacking plate is provided with a push plate and a folding plate which can independently adjust the inclination angle and are hinged to each other; and the left and right sides of the rear end of the bedstead are hinged to telescopic lifting plates, thetop ends of the lifting plates are hinged to bridge plates, the inner ends of the two bridge plates are movably connected and slidably connected to a moving plate, a rotating plate capable of horizontally rotating and moving up and down is arranged on the moving plate, and two leg lifting clamps hinged to each other are arranged at the bottom end of the rotating plate. The device effectively solves the problems that: the body position cannot be changed in the prior hip joint replacement operation, the body position of a patient cannot be firmly fixed in the operation, and the part to be operated cannot be fully exposed.

The invention relates to an equipment inspection method in an area. The method comprises following steps: S1, establishing an inspection virtual map; S2, defining obstacles on the inspection virtual map; S3, presetting inspection paths, and establishing an inspection path through which the inspection equipment can avoid obstacles according to target sites to be inspected; and S4, providing an optimal inspection path among the inspection paths for the inspection equipment by a master control system through calculation by a data analysis processing unit according to gesture information of the inspection equipment at a current inspection target site and coordinate information of a next inspection target site. The method has following beneficial effects that indoor and outdoor conventional item inspection of a power substation is realized, defects of derailing, angle error and fixed routing of rail inspection are overcome thoroughly, dual-differential GPS positioning utilizes an intelligent trailing manner, that is, a base station plus a mobile station, the base station sends a resolved error to the mobile station in an RF manner, the mobile station resolves the GPS position and then the error sent by the base station is subtracted from the GPS position, then the accurate position is obtained, and the error is within 10MM.

The invention discloses computer installation equipment with a multidirectional adjustment function. The computer installation equipment comprises a rectangular frame, a meshing mechanism, a position-limiting mechanism and a clamping mechanism, wherein a bearing plate which is transversely and parallelly placed is arranged on the inner bottom surface of the rectangular frame, the bearing plate isconnected with the rectangular frame through the meshing mechanism, a pair of side plates which are vertically and parallelly placed are arranged on the two sides in the rectangular frame, each side plate is connected with the rectangular frame through the position-limiting mechanism, a rectangular box which is transversely and fixedly connected is arranged at the top in the rectangular frame, andthe clamping mechanism is installed in the rectangular box. The invention further discloses an installation method for the computer installation equipment with the multidirectional adjustment function. According to the computer installation equipment with the multidirectional adjustment function and the installation method for the computer installation equipment, by means of cooperative use of all the mechanisms, the problems that a display screen is not firmly installed and fixed, and small-amplitude steering adjustment cannot be performed are solved, and the overall installation steps are simple, the display screen is fixed from all directions, the stability of installation and fixation of the display screen is improved, and meanwhile, the small-amplitude steering adjustment of the display screen is facilitated.

The invention discloses a fabrication method for a hydrogel/macromolecule polymer film muscular tissue support. The method comprises obtaining a three-dimensional support structure through a layer-upon-layer stacking mode; designing and fabricating a blood vessel network structure mold and a directional flow passage mold according to muscle structural characteristics; fabricating polymer directional film through an electro-spinning technology, fabricating a support single-layer plane structure, stacking other layers of supports on the three-dimensional support structure, and performing covering with the macromolecule polymer film support bonded on the outermost layer to obtain the hydrogel/macromolecule polymer film support. According to the method, the blood vessel network and the directional flow passage are fabricated on hydrogel, directional growth of cells can be achieved through the directional flow passage, nutrition and oxygen supply can be achieved through blood vessel network pipes, the polymer film covered on the periphery has a directional structure, and accordingly, directional growth of peripheral cells can be achieved, stretched film is bound and sewn, and fixation of the support is achieved.

The invention is suitable for the technical field of communication, and provides a method and a communication terminal of playing power-on/off animations. The method comprises steps of presetting categories of power-on and / or power-off played animations and corresponding power-on and / or power-off animations, and playing the corresponding power-on and / or power-off animations according to the categories of the power-on and / or power-off played animations when executing operations of power-on or power-off. Accordingly, the method and communication terminal can play the corresponding power-on or power-off animations according to the different preset categories of the power-on and / or power-off played animations when the operations of power-on or power-off are executed.

The embodiment of the invention discloses an electric quantity control method which is applied to electronic equipment and comprises the following steps: acquiring state information of the electronicequipment; determining the power consumption represented by the state information based on the state information, and determining a low electric quantity threshold corresponding to the power consumption represented by the state information; and detecting the residual electric quantity of the electronic equipment, and outputting an electric quantity prompt message when the residual electric quantity is lower than a low electric quantity threshold value corresponding to the power consumption represented by the state information. The embodiment of the invention further discloses electronic equipment and a computer readable storage medium.

The invention discloses a preparation method of a weak impregnated prepreg of a carbon-containing nanotube. The preparation method comprises the following steps: preparing a carbon-containing nanotuberesin solution; preparing carbon-containing nanotube resin; and overlaying a fiber fabric and a resin film. The method is simple in implementing step and high in operability, and the prepared weak impregnated prepreg of the carbon-containing nanotube exerts advantages of the carbon nanotube in mechanical, electric and thermal properties effectively, so that the shortcoming of the resin in mechanical, electric and thermal properties are supplemented. The prepreg has very high application value in interlaminated toughening and functional modification of a resin-based composite material.

The invention provides an ultrasonic power supply and a control method. The power supply comprises a single-phase fully-controlled rectifying circuit module, a filtering voltage stabilizing circuit module, a power conversion circuit module and a high-frequency transformer which are connected in sequence. The power supply also comprises an inductance adjustable matching circuit module, a voltage control module, and an energy converter, a current sensor, a controller module, a DDS direct numerical frequency synthesizer and a drive circuit module which are connected in sequence; the high-frequency transformer is connected to the energy converter through the inductance adjustable matching circuit module; the drive circuit module is connected to the power conversion circuit module; and the controller module, the voltage control module and the single-phase fully-controlled rectifying circuit module are connected in sequence. Frequency tracking can be realized automatically and quickly, the specific power is constant, and resonance matching can be realized with various energy converters, so that energy is efficiently transmitted to the various energy converters, the energy utilization rate is higher, and the using range is wider.

The invention discloses a realizing method of an adjustable speed timer in the Windows operation system environment. The method comprises that an APIC timer is selected to provide an user state interface; the user state interface is packaged, wherein adjustable-speed function and time correlation function interface are packaged to a dynamic linkbase used for application procedures of the Windows operating system; the application procedures load the dynamic linkbase to realize the call of the user state interface; the user state interface is called, and the adjusted APIC timer is inducted to the inner core; the adjusted APIC timer cycle is assigned to an initial counter register to realize cycle adjustment of the APIC timer cycle. According to the invention, the dynamic adjustment of the timer time interval is completed, time span proportional relations between the timer time interval and a real system are changed, the adjustable function of the timer is realized, the single rate problem of the timer is resolved, and the application requirements of the Windows program in different environments are met.

The invention discloses a conveniently-used numerically-controlled machine tool tooling fixture. Aiming at the problem that an existing numerically-controlled machine tool tooling fixture is difficultto disassemble and install, the following scheme is provided that the conveniently-used numerically-controlled machine tool tooling fixture comprises a second shell, the second shell is internally and fixedly provided with a first shell and a supporting plate, and the supporting plate is located above the first shell, the upper end of the supporting plate is fixedly provided with an air cylinder,the output end of the air cylinder is movably connected with a lifting rod, the upper end of the lifting rod penetrates through the second shell, extends above the second shell and is fixedly connected with a third shell, the left end of the third shell is fixedly provided with a first forward and reverse motor, a power output shaft of the first forward and reverse motor is fixedly connected witha two-way screw rod, the right end of the two-way screw rod penetrates through the third shell and is rotatably connected with the right end of the inner wall of the third shell, and the two-way screw rod is symmetrically provided with two roll ball sliding blocks. The conveniently-used numerically-controlled machine tool tooling fixture is convenient to install and disassemble, capable of adjusting the clamping use height, high in automation degree and suitable for promotion and use.

The invention provides a portable side lifting shifter, overcomes the defects in existing shifting instrument technicality and functionality, and provides a shifter that is powered by manpower or a battery, fitted with a lifting device on a base on one side of the body of a user and connected with a body fixation protective device. The body fixation protective device has three structural modes of a hip suspender, a prostrate support plate and a T-shaped lift carrier, and the body is positioned within a range of the center of gravity of the base to carry out projects such as side lifting, transverse balanced rotation, and shifting in narrow space. The portable side lifting shifter may replace an electric automatic wheelchair and may be driven and controlled by a user himself or herself or controlled by the aid of otherness; to allow for portability, all the main parts of the shifter are made of lightweight metal material, are foldable, retractable and easy to disassemble and assemble, and may be combined into a rectangle for carrying. The shifter also has the advantages of small size with good mobility, good simplicity of control, safety and stability, and reasonable structure with multifunctionality.

The invention discloses a watt hour meter with a fixing function. The watt hour meter with the fixing function comprises a box. The bottom of an inner cavity of the box is fixedly connected with a base. A watt hour meter body is arranged on the upper surface of the base. The bottom of one side face of the inner wall of the box is fixedly connected with a first electric telescopic rod. One end of the first electric telescopic rod is fixedly connected with a sliding rod. The bottom end of the sliding rod is connected to the interior of a first sliding groove formed in the upper surface of the base in a sliding mode. The top of the inner cavity of the box is fixedly connected with a second electric telescopic rod. Through the arrangement of the second electric telescopic rod, a supporting rod, a fixing block, a hinge pin, a first connecting rod, a second connecting rod, a squeezing board and clamping blocks, the effect of clamping and fixing the watt hour meter body in the vertical direction is achieved, so that the watt hour meter body is fixed in all directions, better fixation of the watt hour meter body is achieved, the problem that as a watt hour meter body cannot be fixed, the watt hour meter body tilts or shakes is solved, and the watt hour meter body is prevented from being damaged.

The embodiment of the invention discloses an adaptive imaging positioning navigation system and method for a driverless vehicle. The adaptive imaging positioning navigation system for the driverless vehicle comprises a sending end and a receiving end; the sending end sends original data including positioning navigation information through a visible light signal; and the receiving end is arranged on the driverless vehicle, used to receive the visible light signal and recover the visible light signal to obtain the original data; wherein the sending end comprises a indicator light and a street light, and the receiving end comprises a camera, a motor, a photosensitive sensor and a processor; the receiving end controls the rotation of the camera through the motor, and activates the camera to receive the optical signal and obtain the original data. According to the embodiment of the invention, the street light and the indicator light are used as the signal sources of the positioning navigation, and the variation range of the communication distance is improved by means of an adaptive switching mode, therefore, the problem that the communication mode is fixed and can only be applied to local application fields is solved, and the technical effects that the communication mode can be applied to different communication scenarios and the visible light communication technology is applied tothe field of the positioning navigation are achieved.