50 results about "Low - observation" patented technology

The invention discloses a multi-spectral and panchromatic image super-resolution fusion method based on compressive sensing, which comprises the following steps: 1, respectively inputting a low-resolution multi-spectral image and a high-resolution panchromatic image; 2, obtaining a high-resolution joint sampling value matrix; 3, obtaining a high-low observation matrix; 4, obtaining a high-high observation matrix; 5, obtaining a high-resolution joint observation matrix; 6, studying a high-resolution over-complete dictionary; 7, obtaining a high-resolution rarefaction coefficient; and 8, reconstructing a high-resolution multi-spectral image. According to the method provided by the invention, the compression sensing technology is introduced into the fusion field of the multi-spectral images, the defects that the color is distorted and the spectrum is contorted in the prior art are solved, and the resolution of the fused multi-spectral image is about one time of that of the high-resolution panchromatic image.

A long baseline satellite formation GNSS relative positioning method based on ambiguity fixing is provided in order to improve the success rate of ambiguity fixing and the accuracy of relative positioning results. According to the technical scheme, the method comprises the following steps: first, collecting and pre-processing input data, and determining the absolute general orbit of a formation satellite; then, eliminating the geometric distance and clock error in differential observation data, estimating a single-difference phase ambiguity float solution and a single-difference ionosphere delay parameter, carrying out double-difference transform to get a double-difference wide-lane ambiguity float solution and a covariance matrix, and fixing the double-difference wide-lane integer ambiguity and the double-difference narrow-lane integer ambiguity; and finally, outputting the relative positioning result of ambiguity fixing. By adopting the method of the invention, the problem that ambiguity fixing strongly depends on a pseudo code with low observation precision due to equally-weighted pseudo code and phase processing in M-W combination in the traditional method is avoided, the success rate of long baseline satellite formation GNSS relative positioning ambiguity fixing and the accuracy of final relative positioning results are improved, calculation is stable, and the reliability of relative positioning results is improved.

The invention discloses a flux linkage error observation-based acquisition method of a full-order flux linkage observer of an asynchronous motor without a speed sensor and belongs to the field of a speed sensorless vector control full-order flux linkage observer. The problem that the existing speed sensorless vector control system causes low observation accuracy of the full-order flux linkage observer due to larger errors of motor parameters when a motor runs at low speed, and finally, the running stability of the system is poor is solved. A full-order flux linkage observer error feedback matrix coefficient is obtained according to the following rules, namely, the pole real part of the observer is smaller than the pole real part of an asynchronous motor, the real parts are both negative numbers, the zero pole real parts of an estimation rotation speed and a transfer function are both negative numbers, the error between an estimation flux linkage and a real flux linkage is utilized, when the motor runs at low speed, the equivalence of the system is a current model, and when the motor runs at high speed, the equivalence of the system is a voltage model. The rotor flux linkage phase position error coefficient ilambda is utilized and the rotor flux linkage amplitude error coefficient k is introduced, so that the estimation rotating speed precision is increased. The flux linkage error observation-based acquisition method of the full-order flux linkage observer of the asynchronous motor without the speed sensor is particularly used in the field of speed sensorless vector control.

The invention provides a surface flow measurement method based on a monostation shipborne high-frequency ground wave radar, belonging to the space-time processing field of shipborne high-frequency ground wave over-the-horizon radar signals and the ocean surface flow remote sensing field. The surface flow measurement method solves the problems of difficult synchronizing detection, small remote sensing field, high measurement cost and low observation efficiency of the traditional shore-based high-frequency ground wave radar which measures the surface flow vector field by using a two-station measurement scheme. A sea area to be measured is divided into a plurality of sector grids, and each grid is a detection unit; the position of actually measured positive / negative first-order Bragg spectral peak on each detection unit is obtained by a time-space joint spectrum estimation method and through spectrum search, and a radial flow velocity on the corresponding detection unit is obtained so that the radial flow field distribution of the measured sea area can be obtained; the optimal surface flow vector field on each unit is obtained by the least square method; the optimal surface flow vector fields which are measured in the same detection unit at a plurality of measurement moments are weighted and averaged so that the surface flow vector field of the measured sea area can be obtained. The surface flow measurement method based on the monostation shipborne high-frequency ground wave radar is specifically used for measuring the ocean surface flow.

The invention relates to a co-aperture emission and correction telescope combining the Rayleigh beacon and the sodium beacon. The telescope is formed by a sodium yellow-light laser, a beacon upstream light beam real-time compensation system and an emission telescope. The sodium yellow-light laser gives out laser of 589 nm so as to form the sodium beacon in a sodium layer in high-altitude excitation atmosphere of about 90 km, and generate the Rayleigh beacon in low altitude lower than 25 km. A low-density deformable reflection mirror and an inclining reflection mirror in the real-time compensation system carry out pre-correction on beacon upstream light beams, thereby achieving optimization of sodium beacon light spot shapes excited in the high-altitude atmosphere. The real-time light beam compensation system is mainly formed by the deformable reflection mirror, the inclining reflection mirror, a light splitting mechanism, a Rayleigh beacon wavefront detector and a wavefront controller. In this way, problems of expansion of sodium beacon shapes and inaccuracy of wavefront detection caused by poor observation address conditions and quite low observation angles of a telescope are solved and the telescope is characterized by compact structure, wide application range and easy achievement.

The invention provides a construction method for pouring tunnel second lining self-compacting concrete. Firstly, pouring is conducted from a waist window on the single side for storage, and then a top pouring mode is switched. The construction method comprises the steps that a ground pump pipe is arranged for storage, specifically, after formwork erection of a trolley is finished, the pump pipe is connected into the trolley, and the pump pipe is guided to an observation window on one side through a hose for storage; concrete at the bottom of formworks is poured, specifically, the concrete poured from the single side for storage flows from one side to the other side till the lower observation window is closed; and pipe switching is conducted, specifically, the hose is moved out from the side pouring window and connected with a corresponding top pouring hole till pouring is finished. By the adoption of the construction method, on one hand, applicability selection of the ground pump power in the pouring process of an all-round-formwork trolley of the self-compacting concrete is achieved; and on the other hand, reinforcing bar reveal and retention of the bottom concrete are effectively avoided, finally the construction quality of concrete structure formation is improved, and the construction efficiency is improved.

A solid insulation full-sealed three-position disconnecting switch solves the problem that due to breakdown or flashover a fake fracture of an existing disconnecting switch, a power cut segment of a major loop is electrified. The solid insulation full-sealed three-position disconnecting switch comprises an insulation arc-isolating cover, an insulation integrated line outgoing bottom plate, an insulation static contact seat and an insulation movable contact seat. The solid insulation full-sealed three-position disconnecting switch is characterized in that an upper sealing gasket and a lower sealing gasket are assembled at the butt joint positions of the insulation arc-isolating cover and the insulation integrated line outgoing bottom plate respectively, and a metal shielding earth plate is installed between the sealing gaskets in butt joint in a clamped mode, so that full sealing is realized; the insulation static contact seat is fixedly installed at the upper end in the insulation arc-isolating cover, and the insulation movable contact seat is fixedly installed on the insulation integrated line outgoing bottom plate provided with a line outgoing cone; the side wall of the insulation arc-isolating cover is provided with an upper observation window and a lower observation window; the line outgoing end of the insulation integrated line outgoing bottom plate is connected with the line outgoing cone through an average-voltage induction shielding ring. The solid insulation full-sealed three-position disconnecting switch is reasonable in structural design and high in insulating strength; an isolating fracture is visible, the disconnecting switch is not provided with a fake fracture in a true sense, and therefore safety and reliability of isolation are remarkably improved.

The present invention puts forward an optimization deployment method for an image sensor network, comprising two basic steps, i.e., establishment of an observation model of an image sensor, and optimization deployment of an image sensor network. In particular, the optimization deployment method comprises: a first step of establishing the observation model of the image sensor based on characteristics of the image sensor observing an object; and a second step of establishing an optimization deployment function of the network by establishing an observation area model, a network coverage model, and an observation model of the network, and obtaining the optimal deployment of the network by optimizing the function. According to the optimization deployment method of the present invention, an observation performance function of the image sensor to the object is established, and the more perfect image sensor observation model is introduced into the optimization deployment of the image sensor network, thereby effectively solving the problems of low deployment and operation flexibility and low observation efficiency in the existing image sensor network.

The present invention discloses a distribution estimation method. The method comprises the steps of: Step 1, when a current object is subjected to imaging each time, extracting prospect information provided by an object discovery satellite by employing an object identification satellite; Step 2, deleting objects with low observation values in the prospect information according to three threshold parameters in object filtering knowledge; Step 3, calling a plurality of heuristic algorithms concentrated by a scheduling algorithm to generate a plurality of local observation schemes, wherein the step can be subjected to parallel calculation, and the local observation schemes are observation schemes generated by the satellite according to object information in a prospect time window in a currentstate; Step 4, performing comprehensive assessment of each local observation scheme according to an assessment parameter combination correlation assessment method in scheme assessment knowledge; andStep 5, selecting a local observation scheme with the highest score and locking a first object in the schemes as the next observation object.

The invention relates to a method for detecting free gases in a stratum. In the method, an exploratory well and a development well are used. The method comprises the following steps of: carrying out well logging in the exploratory well and the development wall to obtain well logging data; then calculating the Lame constant and the shear modulus of an underground rock stratum according to the well logging data; taking the Lame constant, the shear modulus and the density as hydrocarbon detection factors and determining threshold values of the hydrocarbon detection factors; and directly detecting gases, such as free natural gas, carbon dioxide and the like with economic values, in the stratum, by using the hydrocarbon detection factors and the threshold values thereof. The method disclosed by the invention is applied to certain coal bed gas exploration area and used for detecting superficial free natural gas reservoir stratums which interdependent and coexistent with coal bed gas. The method disclosed by the invention is used for detecting superficial free gas reservoirs by using the well logging data observed in the well and has the advantages of low observation environment noise, reliable data and easiness in implementation. When the invention is implemented, field engineering cost is not increased generally; even the field engineering cost needs to the increased, the increased cost is the acquisition cost of transverse wave speed at most. Therefore the invention has the advantages of low cost.

The invention provides an underwater robot. The underwater robot comprises a main body boat body (15) and a floater (5), steering propellers (16) and (25) which are mounted on the two sides of the main body boat body, and a hoisting propeller (18) located under the floater, and is characterized in that a front observation window (1) is arranged at the front end of the main body boat body (15); an upper observation window (3), a lower observation window (19), a left observation window (2) and a right observation window (20) are arranged at the front part of the main body boat body (15); a main propeller (12) is arranged at the tail part of the main body boat body (15); steering propellers (14) and (26) are mounted on the two sides of the main body boat body (15); two vertical holes are formed in the floater (5); two hoisting propellers (4) and (10) are mounted under the floater (5); and screw propellers (21) and (22) of the hoisting propellers (4) and (10) are located in the vertical holes of the floater (5).

The invention discloses a photoelectric observing system for space debris with array structures, belongs to the technical field of astronomical observation, and aims to solve the problem of the low observation efficiency of a photoelectric telescope. The system adopts the structure that a main control subsystem is connected with a servo subsystem, so as to control a frame subsystem; the frame subsystem supports a telescope tube subsystem; the telescope tube subsystem is connected with an image collection subsystem; the image collection subsystem is bilaterally connected with the main control subsystem and an object identification and positioning subsystem; the object identification and positioning subsystem is bilaterally connected with the main control subsystem; the output end of a time subsystem is connected with the main control subsystem and the image collection subsystem; the frame subsystem adopts a simplified horizontal structure and is provided with only one azimuth axis; the observing system rotates around the azimuth axis, and the observing system points to a center azimuth angle with the most space debris forecasted; the telescope tube subsystem comprises N telescope partial systems which are mounted on one frame subsystem and are arranged and combined according to a certain array structure, have the same elevation angles, and are positioned on the same horizontal plane; surveillance spaces are connected with one another.

The invention discloses an acoustic undersea tide gauge. The acoustic undersea tide gauge comprises an acoustic measuring unit (1) composed of a hollow column, a transducer, an emission / receiving module, a controller and a battery, an annular substrate (2), and three holding dogs (3). A transverse inner side of the annular substrate (2) is movably connected to an inner ring (5) by a first shaft (4) and is movably connected to the acoustic measuring unit (1) which is arranged vertically and is provided with the transducer on the top of the acoustic measuring unit (1) by a second shaft (6) in the inner ring (5). In the horizontal direction, the first shaft (4) and the second shaft (6) form an angle of 90 degrees. The annular substrate (2) is connected to a marker buoy (8) by a steel rope (7). The acoustic undersea tide gauge does not need a surveying vessel as an auxiliary tool in the whole measurement process and has the advantages of simple structure, lightness, flexibility, easy operation, low observation cost and high precision.

The invention provides a flat plate cleaning machine. According to the scheme, the flat plate cleaning machine comprises a rack, a machine body, a speed adjusting motor, a conveying frame, an upper observation window assembly, a lower observation window assembly, an upper dust sticking rolling wheel assembly, a dust removing rolling wheel assembly, a lower dust sticking rolling wheel assembly, and a pressure adjusting cylinder. The rack is supported by castors arranged around the lower portion of the rack. The machine body is arranged on the rack and provided with an operation screen for display and operation, an emergency stop button used for cutting off a power source, and an alarming lamp used for giving a flashing light alarm. The speed adjusting motor is arranged in the machine body and connected with a speed reducer assembly and a gear assembly. The conveying frame is provided with a plurality of elastic tension conveying belts and a photoelectric inductor. The upper observation window assembly is located above the conveying frame in the manner that the upper observation window assembly can be opened and closed freely. The lower observation window assembly is located below the conveying frame in the manner that the lower observation window assembly can be opened and closed freely. The upper dust sticking rolling wheel assembly, the dust removing rolling wheel assembly and the lower dust sticking rolling wheel assembly can be freely pulled out or pushed back. The input end of the pressure adjusting cylinder is connected to an upper pressure adjusting valve and a lower pressure adjusting valve and used for adjusting the pressure of the upper dust sticking rolling wheel assembly and the lower dust sticking rolling wheel assembly. The flat plate cleaning machine of the scheme is better in dust sticking effect, safe and reliable.

The invention provides a small mobile eddy correlation turbulence water and heat fluxes observation system and method. The small mobile eddy correlation turbulence water and heat fluxes observation system is carriedabove a fixed-wing drone andcomprises an onboard 5-hole turbulence probing head, a thermocouple probing pin, a quick response hygrometer, a temperature and humidity sensor, a net radiometer, a photosynthetically active radiometer, an infrared thermometer, a laser altimeter, a GPS-assisted inertial navigation system, a wireless communication module, an input device, an analog / digitalsignal converter, and a data acquisition control computer. The small mobile eddy correlation turbulence water and heat fluxes observation system and method have the advantages that the small mobile eddy correlation turbulence water and heat fluxes observation system is carriedonthe fixed-wing drone and used for direct observation of earth surface turbulence water and heat fluxes at a regional scale, and the advantages of having low observation cost and good portability and flexibility are obtained. The range of the earth surface representable by flux calculation result ofeach turbulence fluxobservation windowscancommonly cover several square kilometers, and the research and application of moderate and coarse resolution remote sensing images and land surface process model grid scale can be sufficiently satisfied.

The invention provides a zooming optical tweezers dual-photon microscopic imaging device and a method and belongs to the technical field of optical microscopic imaging and optical manipulation. According to the technical characteristics, the device comprises a dual-photon illumination module, a dual-photon scanning module, a dual-photon detection module, an optical tweezers focusing module and anoptical tweezers axial focusing module. According to the zooming optical tweezers dual-photon microscopic imaging device, an axial focusing device composed of a polarizing spectroscope, a quarter waveplate, a low aperture objective lens, a tube mirror and a plane reflecting mirror is additionally arranged in a conventional optical tweezers microscopic system, and axial movement of an optical tweezers focal plane in a common optical path optical tweezers dual-photon microscope is realized, so that a suspension sample is grasped to realize axial movement and dual-photon three-dimensional tomographic scanning imaging is realized. The zooming optical tweezers dual-photon microscopic imaging device has the advantages of simplicity in installation and adjustment, rapid zooming and axial tomography speed and low observation cost.

The invention relates to the technical field of biological extraction, reaction, chemical engineering and the like, and particularly relates to a material reaction observation device in a mixing reaction tank in a biological extraction process. A first pH value inductor and a second pH value inductor are arranged on the outer side of the mixing reaction tank disclosed by the invention, and an equipment electric control cabinet is arranged between the first pH value inductor and the second pH value inductor; an upper connecting pipe and a lower connecting pipe which are communicated with the mixing reaction tank are arranged on the upper and lower ends of one side, which is opposite to the equipment electric control cabinet, of the mixing reaction tank, the lower end of an observation pipeline is vertically connected with the lower connecting pipe by virtue of a lower observation device threaded connector, and the upper end of the observation pipeline is vertically connected with the upper connecting pipe by virtue of an upper observation device threaded connector; a lifting layered observation device which is in sliding connection with the observation pipeline is arranged on the observation pipeline. The mixing reaction observation device has the advantages of simple structure, and convenience and accuracy in operation, the working efficiency can be improved, and working time and manpower are saved.

The embodiment of the invention provides a vehicle tail smoke detection method and system, and the method comprises the steps: carrying out the gray value subtraction of the corresponding pixel pointsin a current frame image and a background frame image, and obtaining a vehicle moving target image; Wherein the vehicle moving target image comprises a moving target area, and pixel values of pixel points in the moving target area are set pixel values; setting an upper observation strip and a lower observation strip in the vehicle moving target image, conducting connected region marking on pixelpoints with the pixel values being set pixel values in the upper observation strip, and conducting connected region marking on pixel points with the pixel values being set pixel values in the lower observation strip; And according to the communication area in the upper observation strip and the communication area in the lower observation strip, judging whether the vehicle in the moving target areadischarges the tail smoke or not. Compared with a manual observation method adopted in existing counting, the method has the advantages that the manpower input is reduced, the influence of observer experience on the detection result is avoided, and the detection efficiency and the detection accuracy are improved.

The invention belongs to the technical field of high school physics and especially relates to a high school physical experiment demonstration bench convenient to observe. Aiming at the problems that aphysical experiment demonstration bench has lower observation, low adjustability and poor convenience, the following scheme is disclosed. The high school physical experiment demonstration bench comprises a fixed plate, wherein first sliding grooves are formed in outer walls of the two sides of the fixed plate, a first bearing is fixed to an inner wall of one side of each first sliding groove through a bolt, a first driving motor is fixed to an outer wall of one side of the fixed plate through a bolt, and a first transmission rod is welded to one end of an output shaft of the first driving motor. According to the high school physical experiment demonstration bench disclosed by the invention, physical experiment tools can be well stored, experiment instruments are prevented from being lost,the experiment instruments can be collected and stored more conveniently, device convenience is improved, the height and the position of a display screen can be very well adjusted, device adjustability is improved, an angle of the display screen can be rotated, the display screen can face users in the different directions when being used, and high school physical experiment demonstration bench has more convenience.

The invention provides an observation system and an observation method for observing the fraction of photosynthetically active radiation (FPAR) and surface albedo of a vegetation canopy. The observation system is composed of a canopy outer observation node device, a canopy upper observation node device and a canopy lower observation node device, wherein the canopy outer observation node device is mounted on an open space outside a canopy or a bracket on the canopy, the canopy upper observation node device is mounted on a mobile observation platform, and the canopy lower observation node device is mounted on a small bracket near the ground. According to the observation method, a multi-channel radiation measuring device for upward observation is fixed with a bracket, a multi-channel radiation measuring device for downward observation is fixed on the mobile observation platform, and a multi-channel radiation measuring device for upward observation and a multi-channel radiation measuring device for downward observation are fixed with a bracket in positions which are 5-10cm from the ground under the vegetation canopy. Thus, observation of the FPAR and surface albed of vegetations of different spatial resolutions in the same area can be realized to the maximum, and the method makes up for the drawback of the traditional method which cannot realize FPAR and surface albed observation.

The invention provides a power maintenance ladder which can provide more convenient technical support for power maintenance in which multiple persons participate at the same time, and with the power maintenance ladder, the maintenance personnel can be supervised and reexamined in real time. The power maintenance ladder comprises two supporting legs (1) and a plurality of beams (2) and is characterized by further comprising a first observation device (7), a first sleeve (3) and connecting rods (4), the first observation device (7) comprises an upper observation opening (5) and a lower observation opening (8), and the upper observation opening and the lower observation opening are connected through a light pipe; the scene in front of the upper observation opening (5) is reflected to a lower mirror body (10) through an upper mirror body (10); the first observation device (7) is inserted into the first sleeve (3) in a connected mode, and the first sleeve (3) is connected with the supporting legs (1) through the connecting rods (4); the first sleeve (3) keeps the position of the light pipe through elasticity of a rubber liner (302), and the connecting rods (4) are telescopic rods and rotationally connected with the supporting legs (1).

The invention relates to the technical field of FRP boat manufacturing, in particular to an FRP scientific research boat with a cockpit wide in view. The boat is provided with a cockpit wall, a deck and a hull, and the front side wall, the left side wall and the right side wall of the cockpit wall are respectively provided with an observation window. The boat is characterized in that a bottom viewwindow is provided above the observation windows of the front side wall, the left side wall and the right side wall of the cockpit wall, the lower end of the bottom view window is connected with thefront side wall, the left side wall and the right side wall of the cockpit wall, and the upper end of the bottom view window is connected to the upper side wall of the cockpit wall. Side lower observation ports are arranged on the left side wall and the right side wall of the cockpit under the observation windows and provided with protruding sealing side walls. The upper end of each sealing side wall is in sealing connection with the upper end of the corresponding side lower observation port, and the lower end of each sealing side wall is in sealing connection with the lower end of the corresponding side lower observation port through a side lower side window. The boat has the advantages of simple structure, wide view, convenient communication and high safety factor.

The invention discloses a window mirror comprising a left lens, a lower transverse tube, an upper straight tube, an upper lens, an upper transverse tube, an upper observation hole, a right lens, a lower straight tube and a lower observation hole. The window mirror is characterized in that the upper lens is preserved inside the upper transverse tube; the upper straight tube is preserved below the upper transverse tube; the lower transverse tube is preserved below the upper straight tube; the left lens and the right lens are preserved inside the lower transverse tube; the lower straight tube is preserved below the lower transverse tube; the lower observation hole is preserved below the lower straight tube; the window glass is fixed on a window in installation; the lower observation hole faces the ground; an object on the ground is mapped into the left lens and reflected to the right lens, and reflected to the upper lens from the right lens; and the upper lens is observed from the upper observation hole by eyes of people, so as to see the situation on the ground. The window mirror has the beneficial effects of simple design, low cost and high practicability.

The invention provides detection equipment applied to a juicer. The detection equipment comprises a feeding hopper and image collection equipment, wherein the feeding hopper is provided with an upperhopper part, a lower observation part and a first communicating part which communicates with a liquid storage cavity storing fruit and vegetable juice; the observation part is transparent or is provided with a transparent main observation window; the first communicating part is arranged in a lower region of the side wall of the observation part and is opposite or adjacent to the main observation window; and a collection window of the image collection equipment faces the transparent observation part or the main observation window to collect image information in the observation part. Through thetechnical scheme, the fruit and vegetable juice from rotten fruits and vegetables can be discovered in time, and then vending is stopped.

The invention discloses a target advanced predicting and tracing method. A motion state of a target can be predicted in advance under the condition of low observation noise influence. The target advanced predicting and tracing method comprises the steps of firstly building a motion model for a moving target; then carrying out advanced prediction, that is, priori estimation, for the motion state ofthe target in the next moment by adopting a square root volume kalman filter method; building a Markov transition probability model by counting an error sequence between the priori estimation value and an observation value before the current moment; predicting a priori prediction error at the next moment by using the Markov transition probability model and correcting an advanced prediction valueat the next moment by using the error. The advanced predicting and tracing method can predict the motion state of the target in advance and can provide a target state prediction value in advance for atracing control system; and the control system can act in advance based on the advanced prediction value to overcome tracing lag and can keep continuous tracing for the target based on the advanced prediction value when the target is shielded.

The invention discloses an automatic observation room for a deformation measurement robot. The observation room comprises an observation room body. The observation room body is of a two-layer structure composed of an upper layer and a lower layer. A work base station is vertically arranged at the center of the upper layer. The measurement robot is arranged on the work base station. An upper layer wall body in the observation direction of the measurement robot is provided with observation windows which comprises the upper observation window and the lower observation window. Gear type connecting rods are installed at the bottom of a lower window frame, and the upper ends of the connecting rods are arranged in the middle of an upper window frame. Motors are arranged in the middle of the lower window frame and engaged with the connecting rods through gears. The upper window frame at the tops of the connecting rods and the tops of the gears is provided with limiting sheets. According to the automatic observation room for the deformation measurement robot provided by the invention, the observation room can effectively protect a total station to carry out automatic observation and ensures the observation precision of the total station; the observation precision and the working efficiency can be improved, the measurement robot is prevented from being stolen, and the automatic total station is ensured to work normally.

The invention provides a power maintenance ladder which can provide more convenient technical support for power maintenance in which multiple persons participate at the same time, and with the power maintenance ladder, the maintenance personnel can be supervised and reexamined in real time. The power maintenance ladder comprises two supporting legs (1) and a plurality of beams (2) and is characterized by further comprising a first observation device (7), a first sleeve (3) and connecting rods (4), the first observation device (7) comprises an upper observation opening (5) and a lower observation opening (8), and the upper observation opening and the lower observation opening are connected through a light pipe; the scene in front of the upper observation opening (5) is reflected to a lower mirror body (10) through an upper mirror body (10); the first observation device (7) is inserted into the first sleeve (3) in a connected mode, and the first sleeve (3) is connected with the supporting legs (1) through the connecting rods (4); the first sleeve (3) keeps the position of the light pipe through elasticity of a rubber liner (302), and the connecting rods (4) are telescopic rods and rotationally connected with the supporting legs (1).

The invention relates to a co-aperture emission and correction telescope combining the Rayleigh beacon and the sodium beacon. The telescope is formed by a sodium yellow-light laser, a beacon upstream light beam real-time compensation system and an emission telescope. The sodium yellow-light laser gives out laser of 589 nm so as to form the sodium beacon in a sodium layer in high-altitude excitation atmosphere of about 90 km, and generate the Rayleigh beacon in low altitude lower than 25 km. A low-density deformable reflection mirror and an inclining reflection mirror in the real-time compensation system carry out pre-correction on beacon upstream light beams, thereby achieving optimization of sodium beacon light spot shapes excited in the high-altitude atmosphere. The real-time light beam compensation system is mainly formed by the deformable reflection mirror, the inclining reflection mirror, a light splitting mechanism, a Rayleigh beacon wavefront detector and a wavefront controller. In this way, problems of expansion of sodium beacon shapes and inaccuracy of wavefront detection caused by poor observation address conditions and quite low observation angles of a telescope are solved and the telescope is characterized by compact structure, wide application range and easy achievement.

The invention discloses a common-view observer for contrasting the printing quality of cigarette labels. The observer comprises a pixel acquisition system, a prism conduction system, a projection display system and more than two sets of observation systems, wherein the pixel acquisition system is connected with the prism conduction system; standard cigarette label image information and cigarette label image information to be observed are vertically projected on the projection display system below the prism conduction system through the prism conduction system; and the observation systems are distributed above the projection display system in a circumferential array mode. The invention also discloses a realization method of the common-view observer for contrasting the printing quality of the cigarette labels. By the observer and the method, the problems of incapabilities of observing two contrast samples synchronously in real time and observing all contrast samples through multiple persons, low observation efficiency, inconvenience in operation and the like in the prior art are solved. The invention has the characteristics that: the observer has a simple structure, low constructioncost and high observation efficiency and is easy to operate, cigarette label printing quality information can be accurately known, the printing quality of the cigarette labels can be observed by multiple persons simultaneously, and the like.