387results about How to "Solution range" patented technology

The invention provides a physical education teaching auxiliary system based on a motion identification technology and an implementation method of the physical education teaching auxiliary system. The system is applicable to a personal computer (PC) or an embedded host. The system comprises a movement data collection module, a movement data acquisition module, an identification and training module and a virtual teaching environment module. The device is characterized in that: a micro-inertia measurement unit and an inertia parameter extraction unit are arranged in the movement data collection module; and a movement information resolving unit transmits data which is output by the inertia parameter extraction unit to a multi-sensor data fusion unit for resolving. The movement situation of a target is reflected comprehensively in an inertia tracking mode and an optical tracking mode, so a tracking range is effectively expanded, measurement accuracy is improved, and the problems that the integral information of the target cannot be acquired in the inertia tracking mode, complicated movement identification cannot be performed and sensitivity is poor are solved. A brand new teaching mode is provided for physical education teaching, and a physical education teaching method is digitalized, multi-media and scientifically standardized.

The invention provides a time-resolved single-photon counting two-dimensional imaging system and a time-resolved single-photon counting two-dimensional imaging method and belongs to the technical field of extremely-weak light detection. A trigger 2 is triggered to start sampling, centralized sampling is performed at t time intervals, and measurement and counting are performed if light comes at the intervals, so that time resolving of an extremely-weak light object is realized, and a time sequence image is generated. Imaging is performed on the basis of a compressive sensing (CS) theory, a digital micro-mirror device (DMD5) performs linear random projection on a compressible two-dimensional image, the compressible two-dimensional image is optically modulated and then synchronously detected by using a single-photon counter, and a high-resolution extremely-weak light image can be reconstructed by a small amount of sampling operation. The measurement process is linear and non-adaptive, the reconstruction process is non-linear, and the invention has the advantages of high generality, robustness, expandability, superposition and computation asymmetry, and can be widely applied to the fields of life science, medical imaging, data acquisition, communication, astronomy, military affairs, hyper-spectral imaging and quantum measurement.

The invention relates to a multifunctional model test system for tunnel and underground engineering. The test system comprises a rail, a model box, a servo-controlled test loading device, a rotating seat, rotating shafts and a bracket, wherein the rail is arranged on the upper part of the test system; the model box is arranged on the middle part of the test system and comprises an outer frame, an inner frame and an organic glass plate; the servo-controlled test loading device comprises a horizontal loading jack and a vertical loading jack; the rotating shafts are arranged on the two sides of the middle part of the test system; and the rotating seat is arranged on the back surface of the upper part of the test system and is connected with the bracket through a rotating loading cylinder. The system can perform a model test on a block system, rock tunnel excavation, a tunnel chamber, a tunnel group, a side slope, shield excavation and building traversing, has a facade rotating loading function, effectively solves the technical problem that a strain field is required to have a wide uniformity range and a high uniformity degree in the model test, and can well simulate the stress environment of tunnels existing in a rock-soil body.

The invention provides a polyethylene composition and a preparation method thereof. The polyethylene composition comprises a polyethylene blend, inorganic filler, a coupling agent, a dispersant and fully-vulcanized powder rubber and is used for preparing film materials such as waterproof gas-permeable film. The polyethylene blend comprises three linear low-density polyethylene with different melt indexes so as to ensure the performance of the waterproof gas-permeable film and the nano-scale fully-vulcanized powder rubber can have the effect of promoting the dispersion of the inorganic filler. The waterproof gas-permeable film is prepared from the polyethylene composition by casting and stretching, under the condition that the mechanical strength is ensured to be not reduced, the processing performance of the gas-permeable film can be significantly improved, the adjustable ranges of physical performance and permeability are large and the gas-permeable film has the advantages of wider adaptability, uniform micropores, low cost and high cost-performance ratio.

The invention discloses a video surveillance network quality inspection method and a system and belongs to the technical field of network videos. The method comprises the following steps of monitoring work status of a device in a video surveillance network; monitoring and inspecting video image quality; performing statistics on detection results and alarming information of the video surveillance network device and the video image quality, displaying alarm information to users automatically, and providing service including browse, inquiry and the like. The invention further provides the system applying the method. The system manages and monitors large video networks in a concentrated mode, automatically analyzes and evaluates video quality of a front camera in the video surveillance network and operation status of the network device, timely finds out failure of the camera and the network device, and greatly improves safety and flexibility of the video surveillance network and accuracy and real-time performance of video and network failure detection.

The present invention relates to the technical field of unmanned aerial vehicles, in particular to an unmanned ship hangar system, including unmanned aerial vehicles, unmanned ships and communication systems. The unmanned aerial vehicles are composed of two or more unmanned aerial vehicles. The UAV body and the onboard control system are composed. The unmanned ship is equipped with a shipboard platform, a shipboard control system and a shipboard power system. The UAV group is set on the shipboard platform. The communication system includes shipboard communication equipment and For the airborne communication equipment on the UAV, the shipboard control system and the shipboard communication equipment should be set correspondingly, and the airborne control system should be set correspondingly to the airborne communication equipment. The invention integrates the technical advantages of the existing unmanned ships and UAVs, not only realizes the effective complementation of the functions of the unmanned ships and the UAV group in the water area and the air space, but also makes up for the disadvantages of the vertical operation of the unmanned ships in the water area in the air space, and at the same time solves the problem of unmanned ships. The difficulty of human-machine endurance in waters and large-scale communication has greatly improved the work efficiency and duty performance of drones.

The invention provides a glaze for fast-fired crystal glaze ceramic tile and a preparation method and applications of ceramic tile. The glaze comprises basic crystal glaze and a color developing agent, wherein the basic crystal glaze comprises the following raw materials: zinc oxide, titanium dioxide, quartz, cryolite, zinc phosphate, kaolin, and lead frit. A proper amount of zinc phosphate is introduced into the glaze to avoid the raw material frit treatment, which is carried out to ensure the residual amount of nucleating agent, the requirements on the glaze granularity are reduced, the manufacture technologies of crystal glaze and ceramic tiles are simplified, and the technical difficulties that the crystal glaze sintering technology is complicated, the crystal patterns are difficult to control, and the production cost is high are solved. Moreover, the addition amount of quartz and lead frit is precisely controlled to obtain crystal glaze art ceramic tiles which have the advantages of good crystallization effect, strong three-dimensional effect, and good artistic effect. The provided preparation method has the advantages of simpleness, lower sintering temperature, shorter period, and suitability for massive industrial production.

The invention discloses a tubal curtain advanced support constructing method for a deep mine roadway of a coal mine passing through a fault fracture zone. The method comprises the following steps: A, constructing an initial workshop and a receiving workshop at two ends of the fault fracture zone respectively; B, reinforcing roadways of the initial workshop and the receiving workshop by adopting astepwise combined support scheme; C, reinforcing by adopting advanced grouting according to the lithologic fracture condition of the opening; D, jacking steel tubes to the receiving workshop through the fault fracture zone from the initial workshop sequentially according to round or elliptical fracture surfaces by utilizing a soft rock tube push bench; E, in a process of jacking the steel tube, injecting a drag-reducing and lubricating material through an annular grouting system which is preset in the tube, and injecting plain concrete in the steel tube to form a tubal curtain protector; and F, performing subsequent excavation support on the roadway in the tubal curtain body after the concrete in the tube reaches a designing age. The method is simple, safe and reliable, has remarkable effect for safe excavation on a roadway with fracture densely distributed zone which has high stress, is soft to fracture and developed in fissure water.

The invention belongs to the technical field of the permanent-magnet brushless machine manufacture, particularly to a stator permanent-magnet machine adaptable to the application fields of wide speed regulation and high efficiency, such as the mixing dynamic car and the electric automobiles, composed of a stator, a rotor, an armature winding and an NdFeB permanent magnet, characterized in that, the original NdFeB permanent magnet is saved, an ALNiCo permanent magnet and a magnetizing winding for adjusting the magnetic field strength and the magnetic flux density of the ALNiCo permanent magnet are arranged on the stator. The invention has the advantage that, the ALNiCo permanent magnet and the magnetizing winding are first inducted in the stator permanent-magnet, to cause that the flux memory type stator permanent-magnet machine inherits the advantages of large power intensity and good fault tolerant performance of the stator permanent-magnet machine, meanwhile solves the defect that it is difficult to realize the weak magnetic control, the range of the constant power speed control is small and the operating efficiency of the constant power operation is low.

The invention discloses a photovoltaic tracking optical angle sensor, consisting of a sensor body structure and a sensor post-stage signal processing circuit. The body structure part mainly comprises a sealing transparent glass shade 1, a top surface horizontal baffle 2, a sensor column side 3, photosensor elements 4, a light transmission slit 5, a facade groove 6 and a bottom surface photosensor element. The post-stage signal processing circuit mainly comprises a top surface photosensor element output signal processing circuit and a bottom surface photosensor element output signal processing circuit. The optical angle sensor adopts two working ways of coarse detection and precise detection. The coarse detection is finished by using four photosensor elements on the top surface which are arranged symmetrically and corresponding electric bridge comparison circuits, and the precise detection is finished by using the slit on the top surface, the photosensor element on the bottom surface and corresponding signal processing circuits. The photovoltaic tracking optical angle sensor can not only have higher tracking precision, but also have wider detection angle range, thereby well adapting to environment of wind-sand and having better capacity of resisting rain and snow.

The present invention discloses a lake-reservoir cyanobacteria water bloom recognition method based on remote sensing monitoring and evidence fusion technology improvement, and belongs to the technical field of environmental projects. The method comprises: establishing a remote sensing inversion model, determining cyanobacteria water bloom breaking-out degree recognition indexes, pre-treating monitoring data, assigning belief function values, and recognizing monitoring area cyanobacteria water bloom. According to the present invention, an ensemble learning Bagging algorithm is fused into regression analysis of the remote sensing inversion model (ie., the normalization vegetation index model) to correct parameters of the model to obtain the corrected remote sensing inversion model so as to improve fitting accuracy; the problem of selection of indexes for lake-reservoir cyanobacteria water bloom recognition and value ranges thereof is solved; the problems of selection of the monitoring area and pretreatment of the monitoring data are solved; the problem of assignment of the belief function values is solved; and effective cyanobacterial water bloom recognition is achieved.

The invention discloses a high-dynamic-range image acquisition method of single exposure. The method comprises the following steps of: comparing an ideal average brightness value B0 with an average brightness value of all pixels of a bright image and a dark image acquired through exposing a charge coupled cell within an initial exposure time t0; calculating out a new exposure time tnew through a digital signal processor; exposing the charge coupled cell within the new exposure time tnew to acquire a bright image and a dark image and respectively comparing a threshold value S with brightness values of the first pixel to the Nth pixel of the bright image and the brightness values of the first pixel to the Nth pixel of the dark image; and acquiring the brightness values of the first pixel to the Nth pixel of a high-dynamic-range image through a formula, wherein the image comprising the brightness values of the N pixels is the high-dynamic-range image. By acquiring a high-dynamic-range image through the single exposure of an image sensor, the invention solves the technical problems of small dynamic range, unavailability in a motion scene, and the like of a traditional image acquisition method and has the advantage of low production cost.

The invention discloses a nanometer covering craft of metal surface, which comprises the following steps: (1) cleaning metal surface; (2) covering nanometer powdered material on the surface; (3) selecting laser beam of flare according to covering surface to proceed smelting-covering treatment; carrying on keeping inactive gas simultaneously in the area of laser smelting-covering treatment; (4) cooling metal by radiation. The invention improves the property of key components and parts of mechanical equipment, which restores and re-uses perishable faulty element

The invention discloses a method for implementing a power system stabilizer. The method includes steps of acquiring a rotation speed variable quantity via a blocking filter link according to the rotation speed and active power of a rotor of a power generator, and respectively acquiring low-band differential signals, medium-band differential signals and high-band differential signals via a differential filter; parallelly adding the low-band differential signals, the medium-band differential signals and the high-band differential signals together to acquire rotation speed variation comprehensive signals of the power generator; measuring phase-shift characteristics of the rotation speed variation comprehensive signals and the rotation speed and uncompensated phase-shift characteristics of an excitation control system of the power generator by a forced oscillation process, computing required phase-shift characteristics among the rotation speed variation comprehensive signals and the power system stabilizer, designing multi-order lead-lag link phase-shift parameters which are serially multiplied by one another, performing phase compensation to meet the required phase-shift characteristics; finally outputting signals of the power system stabilizer and superposing the signals of the power system stabilizer on a reference voltage of an excitation regulator of the power generator. The method has the advantage that active power low-frequency oscillation of the synchronous generator can be effectively suppressed.

The invention discloses an SAR (Synthetic Aperture Radar) image change detection method based on an adaptive weight and a high frequency threshold, which mainly solves problems that the detection effect is not ideal in the prior art and that a single-type difference chart is low in detection accuracy. The SAR image change detection method comprises the implementation steps of 1, reading in two SAR image I1, I2 which are acquired from the same area at different moments; 2, respectively calculating a mean ratio difference image Dm and a neighborhood log ratio difference image Dl of corresponding pixels of the image I1 and the image I2; 3, carrying out wavelet fusion on the mean ratio difference images Dm and the neighborhood log ratio difference images Dl to acquire fused difference images Xd; and 4, clustering the fused difference images Xd into two different categories so as to acquire a change detection result. The SAR image change detection method is simple to operate, good in noise resistance and high in detection accuracy, can acquire good effects for different types of SAR images, and can be applied to environment monitoring, marine observation, disaster evaluation, resource exploration, urban planning and geographical mapping.

The invention discloses a positioning device for needle insertion by a surgical robot under a magnetic sensor environment, which pertains to the technical field of accessories for minimally invasive surgery. The positioning device adopts a connecting rod mechanism taking the shape of parallelogram to transmit motion and comprises a short rod and a long rod of an inputting terminal and a short rod of an outputting terminal, wherein, the short rod of the inputting terminal has a disc-shaped structure and is fixedly connected with a harmonic reducer; one end of the long rod is hinged with the short rod of the inputting terminal to transmit the motion to the outputting terminal; the short rod of the outputting terminal is designed to a straight-angle shape and has a long side and a short side, wherein, the end of the long side of the short rod of the outputting terminal is provided with a surgical needle parallel to the long side so that the surgical needle has a maximum positioning scope of +/-90 degrees vertically; the long rod is longer so that the distance between a revolving shaft of the short rod of the inputting terminal and the end of the long side of the short rod of the outputting terminal is more than or equal to 400mm when the long side of the short rod of the outputting terminal is vertical. The positioning device has compact structure, avoids the influence of magnetic interference sources such as a motor and the reducer of the inputting terminal on the normal operation of a magnetic locator, and also solves the problems of single angle and small scale in needle insertion in the traditional surgical operation.

The invention relates to the technical field of unmanned aerial vehicles, in particular to an unmanned aerial vehicle express system. The unmanned aerial vehicle express system comprises an unmanned aerial vehicle and express cabinets distributed on different networks. A battery pack of the unmanned aerial vehicle is horizontally and slidably arranged at the tail of the unmanned aerial vehicle, and a vertical lifting type express box is arranged below the unmanned aerial vehicle. A fixing device for fixing an undercarriage of the unmanned aerial vehicle is arranged at the top of each express cabinet. Limiting devices for fixing an unmanned aerial vehicle body are arranged on the front side and the rear side of each fixing device. A battery replacement device for replacing the battery pack is arranged on the rear side of each fixing device. An opening corresponding to the express box is formed in the position, located in the middle of the corresponding fixing device, of each express cabinet. A sorting device is arranged in each express cabinet. By the adoption of the unmanned aerial vehicle express system, delivery can be conducted quickly and effectively, the problems that the express delivery efficiency is low, and the coverage range is narrow are solved, and accurate delivery is achieved; and batteries of the unmanned aerial vehicle can be replaced automatically, the defects that the voyage is short and the load is low are overcome, meanwhile express receiving and delivery are integrated, and stable delivery of objects is guaranteed.

The invention discloses a system and a method for continuous extrusion production of a fine-grain magnesium alloy strip. The system comprises a decoiling emptying device, an on-line straightening device, an on-line heating device, a continuous extrusion device, a cooling device and a winding displacement collection device. Through control of a temperature of a rod, a good extrusion driving force is produced between the rod and an extrusion wheel groove. Through an expansion mold cavity and a flow-blocking mold, magnesium alloy expansion flowing in a width direction is realized. In order to extrude a plate having larger width, the system adopts a two/three rod feeding-type extrusion mode so that joining and intermetallic welding of multiple rods in a corresponding multi-rod mold cavity are realized. The system and the method have the advantages that a process route is short; production efficiency is high; a grain refinement degree of a product microstructure is high; plate formability is good; and a continuous production line provided by the invention is suitable for industrial application.

The invention discloses an evaluation method for tight oil well reserves, and relates to the technical field of oil and gas exploration and development. The problem that the prediction precision of the tight oil well reserves is low is mainly solved. Geological factors of a tight oil well region and the exploration states of tight oil wells are utilized for grading different tight oil wells to obtain the abundance of each tight oil well in each grade of tight oil wells, through calculating the abundance planar distribution, the economic coefficient of each tight oil well in each grade of tight oil wells is obtained, then through the economic coefficients, all the grades of tight oil wells are divided into different types, and on the basis of the area of each type tight oil well in each grade of tight oil wells and the abundance of each type tight oil well in each grade of tight oil wells, the reserves of all the types of tight oil wells in all the grades of tight oil wells are finally obtained. The evaluation method for the tight oil well reserves effectively improves the prediction precision of the tight oil reserves.

The invention provides a pressure regulating valve, which comprises a valve body, a flow guide sieve sleeve, a double-piston assembly and a regulating mechanism, wherein a circulation part of the flow guide sieve sleeve is provided with a plurality of through holes extending in the axial direction of the flow guide sieve sleeve, the double-piston assembly comprises a pressure regulating piston and a balance piston and can move in the axial direction along the inner wall surface of the flow guide sieve sleeve, a pressure balance cavity is formed between the pressure regulating piston and the balance piston, and the regulating mechanism is used for controlling the flow rate and the pressure of fluid in the pressure balance cavity so that the double-piston assembly realizes the synergistic effect in the axial direction of the valve body for controlling the engaging position of the pressure regulating piston and the inner wall surface of the flow guide sieve sleeve. The pressure regulating valve provided by the invention can realize the self adaption to the pressure regulation of the pressure regulating valve, in addition, the safety is ensured, and meanwhile, the pressure at the outlet side of the pressure regulating valve is reliably stabilized in a proper range.

Disclosed is a management and payment method for non-bank accounts based on bank accounts to solve the current problems of there being many non-bank accounts and inconvenience in use. According to the invention, a multi-account management and payment system is employed which establishes connections with various non-bank accounts and bank accounts and through the multi-account management and payment system, management of all non-bank accounts and orderly payment in a unified manner according to the sequence of set priority levels are achieved through bank accounts. The management and payment method for the non-bank accounts based on the bank accounts has the beneficial effects that employment of bank account transaction approach provides convenience; meanwhile consumable balances in all non-bank accounts can be preferably used; and the problems of restricted usage scenario, range and consuming amount of non-bank accounts are solved. Unified merchant liquidation is much easier for merchants, compared with separate reconciliation and independent liquidation of current multiple systems.

The invention discloses an internet-based joint loan business solving method, and relates to the field of joint loan. The method comprises the steps that 1: the bank customer accesses to the platformsystem to start the joint loan business through the financial private cloud service mode; 2: the cooperative bank accesses to the platform system to complete joint loan approval, loan, capital settlement, loan origination and registering the loan asset debt evidence data through the SAAS mode; and 3: the platform system performs asset and post loan management based on the loan asset debt evidencedata so as to realize implementation management and data butting with the cooperative bank. The problem of low bank service efficiency caused by narrow offline processing coverage and complex processof the present joint loan business can be solved so as to achieve the effect that the bank uses the user identity to perform simple and convenient loan business and the loan service efficiency can beenhanced.

The invention relates to a single-degree-of-freedom joint mechanical driven by two pneumatic artificial muscle assemblies, and belongs to the technical field of bio-robots. The single-degree-of-freedom joint mechanical driven by the two pneumatic artificial muscle assemblies can be used in leg joints of the four-footed bio-robots. The single-degree-of-freedom joint mechanical driven by the two pneumatic artificial muscle assemblies comprises the two pneumatic artificial muscle assemblies, two rotary parts, a thigh framework and a crus framework, wherein the two ends of the two pneumatic artificial muscle assemblies are connected with the rotary parts and pin shafts. The single-degree-of-freedom joint mechanical driven by the two pneumatic artificial muscle assemblies has the bionic advantages of being large in movement range, high in movement speed, good in flexibility and the like.

The invention discloses a resource distribution indicating method and a base station. The resource distribution indicating method comprises the following steps: the base station divides a logical resource unit into M resource distribution units; when M is more than P, the base station divides the M resource distribution units into K groups, wherein P is a bit number occupied by resource indicating information, and K is more than and equal to 1 or less than M; and the base station sends the resource indicating information to a terminal, wherein the resource indicating information indicates the group with the resource distribution units distributed for the terminal by the base station and/or the resource distribution units distributed for the terminal by the base station in the group. The invention has the advantages of lower complexity, easy realization and wider resource indicating range.

The invention discloses a space robot gripper mechanism, namely an end effector of a mechanical arm, which solves the problems of small gripping range, non-unique locking position, high probability of losing a target during griping and the like existing in the conventional gripper mechanism, greatly simplifies the entire mechanism and also improves the manufacturability. In the mechanism, a palm surface 1, an upper bearing seat 3, a lower bearing seat 4 and a box bottom 7 form a basic frame of the entire mechanism; two finger shafts 9 are arranged in bearing holes between the palm surface 1 and the upper bearing seat 3; two fingers 2 and 5 are fixedly connected with the finger shafts 9; the shaft ends of the two finger shafts are provided with gears 19; a motor 11 and a brake shaft 22 are arranged in through holes between the upper bearing seat 3 and the lower bearing seat 4; the shaft ends of the brake shaft 22 and the motor 11 are provided with gears 21; the gripper box bottom 7 is connected with the bearing seats and an external mechanism through flanges; and a box wall 6 is interconnected with the palm surface 1 and the box bottom 7 to package the entire gripper mechanism. The mechanism has the advantages of compact design, small volume, easiness of machining, convenience in assembly and disassembly and the like.

The invention discloses a method for synergetic extraction of coal bed gas in a caving type gob area and a lower coal bed. The method comprises the steps that firstly, a mine is explored, a horizontal well is constructed from the ground to a base plate of the gob area, carbon dioxide is compressed into the well for cleaning, and coal bed gas extraction is carried out; when the extraction amount of coal bed gas in unit time drops to 20%-40% of Qi, running and stopping circulate, the extraction pressure is reduced, and the re-extraction process is carried out again; when the extraction amount drops to be below 20% of Qi, carbon dioxide is injected for replacement, and extraction is carried out again; when the extraction amount drops to be below 20% of Q1 again, the horizontal well and a coal and rock strata of the lower coal bed are subjected to fracture, and coal bed gas discharge and extraction are carried out; when the extraction amount drops to be below 20% of Q2, supercritical carbon dioxide replacement is carried out; and when the extraction amount drops to 10% of Q2 through extraction, extraction is stopped. By means of the method, synergetic extraction of coal bed gas in the carving type gob area and coal bed gas near a low coal seam is achieved, cost is reduced, and the coal bed gas resource is extracted to the greatest extent.

The invention discloses a programmable analog unit for processing a sensor signal, which comprises a first programmable switched capacitor group, a second programmable switched capacitor group, a programmable main fully differential operation amplifier, a first programmable auxiliary fully differential operation amplifier, a second programmable auxiliary fully differential operation amplifier, an output multiway selector and an output control module, wherein the first programmable switched capacitor group is used for receiving an external sensor differential signal; the second programmable switched capacitor group is used for receiving an external sensor differential signal; the programmable main fully differential operation amplifier is used for generating and outputting a main fully differential signal after signal processing; the first programmable auxiliary fully differential operation amplifier is used for generating and outputting an auxiliary fully differential signal; the second programmable auxiliary fully differential operation amplifier is used for generating and outputting an auxiliary fully differential signal; the output multiway selector is used for selecting and outputting one way of differential output signal; and the output control module is used for generating and outputting a positive-negative reverse-phase or modulated differential output signal. The programmable analog unit for processing the sensor signal can read out small capacitance and small voltage sensing signals and process analog signals, is applied to sensor signal detection of physical quantities such as an angular velocity, an accelerated velocity and the like, and is suitable for circuits of an FPAA (field programmable analog array), a FPMA (fixed preassigned multiple access) and a PSOC (programmable system on chip).

The invention relates to a micro displacement measuring system with double laser-source-adjustable Fabry-Perot interferometers, and belongs to the technical field of geometrical product measurement. According to the measuring system, two Fabry-Perot interferometers with wavelength-adjustable lasers as light sources are used for measuring the displacement of a measured target, the two adjustable light sources are used for alternately tracking the frequencies of different resonant modes of Fabry-Perot cavities, and the range of displacement measurement is broadened while it is guaranteed that the Fabry-Perot interferometers have the high measurement resolving ability. The micro displacement measuring system effectively solves the conflict between the improvement of the interferometer measurement resolving ability and the broadening of the measurement range, and can be applied to micro displacement measurement with nanometer-level accuracy.

The invention discloses an all-digitally controlled phase-locked loop with low jitter and a wide capturing frequency range. The phase-locked loop comprises a (timer digital converter) TDC module, a digital filter, a (digitally controlled oscillator) DCO module, a binary frequency divider and a variable-mode frequency divider, wherein the TDC module compares phases of an input reference clock and a feedback clock, and outputs a phase error signal; the digital filter converts the phase error signal into a set of control words, and the DCO module adjusts frequency and phase of an output clock according to the set of control words; the binary frequency divider reduces the frequency of the output clock to a half, and generates the feedback clock to TDC module for comparison after the variable-mode frequency divider implements frequency division according to a preset module value; circulation is implemented hereunder until the frequency of the reference clock is accordant with that of the feedback clock, and when the phase reaches a preset error, the all-digitally controlled phase-locked loop is locked. The TDC module reduced output jitter, the capturing frequency range of the phase-locked loop is broadened by the adjustment of the DCO module, and thus the problem that the existing all-digitally controlled phase-locked loop is relatively high in jitter value and relatively narrow in capturing frequency range is solved.

The invention relates to an electric power overhauling supporting device. The electric power overhauling supporting device comprises a fixed platform. Four parallel supporting chains are symmetrically installed on the upper end surface of the fixed platform. An operating platform is installed at the top ends of the four parallel supporting chains. A rotating shaft is installed in the middle of the lower end surface of the fixed platform through a bearing. A rotating motor is connected to the lower end of the rotating shaft through a coupler and installed on a bottom plate through a motor base. Three fixing shafts are uniformly arranged on the upper end surface of the bottom plate in the axis direction of the fixed platform. Three planetary wheels are installed at the upper ends of the three fixing shafts through bearings correspondingly. The inner sides of the three planetary wheels are all engaged with a sun wheel. The sun wheel is installed on the rotating shaft through a key. The outer sides of the three planetary wheels are all engaged with an inner gear ring. The electric power overhauling supporting device is capable of solving the problems that an existing substation rigid support is poor in dynamic adjustment performance, nonadjustable in height, small in application scope and the like and has the advantages of being good in rigid supporting performance, height adjustment performance and stability performance, wide in application scope, high in working efficiency and the like.