207 results about "Laser target" patented technology

The invention relates to the technical field of action analysis, in particular to a laser targeting training management system which comprises an immersive training environment module, a biological characteristic analysis module group, an intelligent trajectory management module group, a federal learning center module group, a tactical training management module group and a command and control system module group. Compared with the limitation of lack of battlefield dynamic complexity simulation by adopting a static preset scene in the prior art, the scheme deeply integrates multi-physical field environment control, intelligent target dynamic coordination and a cross-sensory feedback technology to construct an immersive battlefield space with temperature and humidity gradient adjustment, explosion shock wave simulation and geographic space accurate reconstruction linkage; therefore, multi-dimensional collaborative transition from single-dimensional visual simulation to tactile sense / auditory sense / olfactory sense / somatosensory is realized, so that soldiers can obtain subversive environment adaptability and tactical decision-making ability exercises in a comprehensive battlefield pressure environment close to reality.

The invention discloses a construction method and device for controlling the perpendicularity of a high pier, and belongs to the technical field of bridge engineering construction. Determining a plumb aligner control point; mounting a creeping formwork bracket; installing a laser target; correcting and installing an inclination measuring instrument; centering the point position of the laser plumb aligner; measuring a deviation value between the laser beam and the pier body; collecting data of an inclination measuring instrument; and pier body concrete is poured. According to the method, through triple measurement rechecking and chemical deviation calculation, the perpendicularity control precision and efficiency of high pier construction are remarkably improved, and the method is suitable for high pier construction in a complex environment.

The invention relates to a processing technology of an optical module circuit board, which comprises the following steps of: cutting a double-sided copper-clad plate, cutting the plate, and manufacturing an inner-layer circuit to obtain an inner-layer plate; performing hot melting and riveting on the inner-layer plate and then adding layers to obtain a first multi-layer plate; the first multilayer board is subjected to browning copper reduction, laser target burning, plasma degumming, copper deposition and electroplating, vacuum tree plug, high-cutting grinding and circuit manufacturing; performing double-sided layer adding on the treated first multilayer board to obtain a second multilayer board, and performing browning copper reduction, laser target burning, plasma degumming, copper deposition electroplating, vacuum tree plug, high-cutting grinding and circuit manufacturing on the second multilayer board to obtain a semi-finished board; and performing finger gold plating, LPI printing, vacuum etching and the like on the semi-finished board to obtain a finished board. The processing technology can meet the market requirements of 800G optical module products, the high-speed resistance yield is improved, and the mass production capability of the optical module technology is realized.

The invention discloses a deviation rectification control method and system for simulating shield excavation, and relates to the technical field of shield control. The deviation rectification control method and system for simulating shield excavation comprise the steps that S1, shield deviation rectification data are collected in real time, and the shield deviation rectification data are preprocessed; s2, extracting an attitude deviation component, comprehensively evaluating environmental drift and optical distortion influence of attitude deviation, and generating each calibrated attitude angle; s3, all the calibrated attitude angles are read, attitude correction required values in all directions are calculated in combination with the laser target deviation value, the dynamic fluctuation degree of the execution process is quantified, and the target stroke of the deviation correction oil cylinder is obtained; and S4, the target speed is calculated, a deviation rectification control instruction is generated and issued for execution, a deviation rectification execution data set is formed, and a deviation rectification control closed loop is completed. The problems that an existing system lacks an automatic calibration and anomaly recognition mechanism, sensing data distortion still participates in deviation correction control, PLC attitude calculation errors are accumulated, and false deviation correction is generated are solved.

The invention belongs to the field of laser processing and numerical simulation, and particularly relates to a finite element modeling and analysis method for a nanosecond pulse laser target material. The method comprises the following steps: establishing and loading a laser heat source model; establishing a target material finite element model and carrying out grid division; establishing and solving a transient heat conduction equation; carrying out multi-cycle iterative solution and post-processing; and performing model verification and parameter analysis. According to the method, the laser heat source model is established, the adaptive grid encryption strategy for temperature gradient optimization is adopted, and the transient solution algorithm is combined, so that compared with a traditional simplified analysis model or general commercial software simulation, the prediction precision of the target material temperature field spatio-temporal evolution law under the nanosecond pulse laser effect is remarkably improved. The method can accurately predict the temperature distribution and evolution law of the target material under the action of laser, has the advantages of high modeling precision, good calculation efficiency, wide application range and the like, and is suitable for engineering applications such as laser processing and damage evaluation of optical materials and composite materials.

The invention belongs to the technical field of shield tunneling machine construction, and discloses a high-precision and high-real-time measurement method and device for a shield pose, and the method comprises the steps: respectively collecting data of an accelerometer, a gyroscope, an oil cylinder stroke sensor and a laser target, and calculating the pose of a shield tunneling machine through employing the acceleration and angular velocity measured by a speedometer and the gyroscope, according to the method, the propulsion speed of the shield tunneling machine is obtained after data differentiation and lever arm error compensation of an oil cylinder stroke sensor, the position posture of the shield tunneling machine is obtained after time synchronization and delay compensation of laser target measurement data, and the error of an inertial navigation unit is estimated through extended Kalman filtering based on the error state of the inertial navigation unit. And finally obtaining the corrected position and posture of the shield tunneling machine. According to the shield tunneling machine pose measurement method based on multi-sensor fusion, the measurement precision, the measurement frequency and the measurement real-time performance can be remarkably improved. According to the invention, the problems of poor measurement precision, long period and low real-time performance of an existing shield tunneling machine pose measurement mode are solved.

The invention relates to an installation structure and a precision adjustment method of a long-distance laser target tracking and ranging light path, which are used for high-precision adjustment of a laser emission direction of a space target tracking and ranging light path. And the deviation between the emergent direction of the laser reflected by the three reflectors and the swing angle of the rotary table is minimum. The method comprises the following steps: firstly, leading a pitch axis and an azimuth axis to a plane mirror by using an autocollimator; secondly, a second reflecting mirror and a first reflecting mirror are installed and adjusted through the installation mode of a cushion column and a fastening screw, the grinding amount of the cushion column is calculated according to the back image motion track of an autocollimator or the motion track of a laser imaging point in a measurement camera, the cushion column is ground on the basis, and the purpose of high-precision installation and adjustment is achieved; thirdly, through zero calibration of a visible light camera, a measurement camera and a corner reflector, an adjustment system of a third reflector is built, and adjustment of the third reflector is achieved; finally, the cushion columns and the fastening screws are reinforced through epoxy glue, and the mechanical resistance of the light path is guaranteed.

The invention provides a directional ultra-short strong field electromagnetic pulse generation device, a plasma channel is formed through laser targeting gas and ultra-short strong field electromagnetic pulses are generated, the device comprises a high-power laser, a laser focusing module, a gas target module and a vacuum cavity, the high-power laser is used for generating femtosecond laser pulses and emitting the femtosecond laser pulses into the vacuum cavity; the laser focusing module is arranged in the vacuum cavity and is used for focusing femtosecond laser pulses generated by the high-power laser onto the gas target; the gas target module is arranged in the vacuum cavity and used for generating a high-density gas target and spraying the high-density gas target upwards, and a gas spraying opening of a gas target nozzle is located below the laser focus and can be adjusted in an electric control mode. According to the invention, escape electrons with charge quantity larger than that of a solid target and a low-density gas target can be generated, and laser forms arc discharge similar to thunder and lightning cloud in near-critical density plasma to generate EMP, so that electromagnetic radiation which is stronger than that of the solid target and far better than that of a common gas target can be generated.

The invention relates to the technical field of laser simulation shooting training, and particularly discloses a laser simulation shooting training system and method, and the system comprises a laser targeting gun which is used for simulating shooting to emit a laser beam; the shooting data acquisition module is used for acquiring shooting data of a shooter in real time; the laser shooting gun is used for simulating shooting to emit laser beams, the laser receiving target collects the positions, falling on the receiving target, of the laser beams, the data analysis module analyzes the collected data, scores corresponding to various evaluation indexes in the shooting process of the shooter are generated, and the comprehensive score of the shooter is generated. According to the laser simulation training method, the aim of accurately feeding back various evaluation indexes in the laser simulation training process of the shooter can be achieved, the shooter can conveniently and clearly find out the defects of the shooter and carry out targeted training, and the generated comprehensive score is convenient for the shooter to carry out self-evaluation on the shooting ability of the shooter.

A laser target localization method and an implementation apparatus therefor, and a tunnel deformation monitoring method. The laser target localization method comprises: providing in a spaced manner a laser ranging module (31) and a target on an object to be subjected to detection (S1); the laser ranging module (31) projecting an emergent laser onto the target (S2); establishing a sampling point coordinate system by using a projection point of the emergent laser as the coordinate origin (S3); making the projection point of the emergent laser move in a spiral line around the coordinate origin in the sampling point coordinate system, and collecting real-time coordinate values of all sampling points (100) in the sampling point coordinate system, and real-time intensity values of reflected light of the emergent laser at the positions of all the sampling points (100) (S4); and after the spiral-line movement ends, determining the region of the target on the basis of the real-time intensity values of the reflected light at the positions of all the sampling points (100), and on the basis of the coordinate values of all the sampling points (100) in the region of the target, determining the central point of the target (S5).

The utility model belongs to the technical field of travelling crane type suction dredgers, and particularly relates to a sludge suction travelling crane which comprises a settling pond and a moving plate, a plurality of two groups of side plates are fixedly mounted at two ends of the bottom of the moving plate, a rotating shaft is rotatably connected between the two groups of side plates through bearings, and rollers are fixedly mounted on the rotating shaft. A set of side plates are fixedly provided with a servo motor, an output shaft of the servo motor is fixedly connected with a rotating shaft, the two ends of the top of the sedimentation tank are fixedly provided with guide rails, and rolling wheels are located on the guide rails so that the rolling wheels can roll along the guide rails. The running position of the sludge suction crane can be detected in real time, and when the laser range finder is separated from the stainless steel laser target and monitoring data suddenly change in a short time, the crane is triggered to derail and give an alarm, and the crane is forcibly stopped immediately.

The invention discloses a blanket size measuring device, and relates to the technical field of blanket size measurement, the blanket size measuring device comprises a measuring platform and a blanket body arranged on the upper side of the measuring platform, the upper side of the measuring platform is fixedly connected with a fixing plate, and the right side of the fixing plate is fixedly connected with a fixing rod and a laser ranging module. A side block is fixedly connected to the right end of the fixing rod, a measuring unit for measuring the blanket body is arranged on the upper side of the fixing plate, the measuring unit comprises a fixing frame, and the fixing frame is fixedly connected to the upper side of the fixing plate. The blanket size measuring device is provided with a laser ranging module, a lifting plate, a telescopic cylinder, a telescopic plate and a laser target, so that the length of a blanket can be conveniently measured, and through a fixed cylinder, a movable plate, a first inclined plate, a second electric push rod, a vertical plate, a movable rod, a contact plate and a first laser sensor, the length of the blanket can be conveniently measured; the width of the blanket is measured, and the workload of workers is reduced.

The invention discloses a rapid target plate calibration device, and belongs to the technical field of laser boresighting, the device comprises a laser boresighting mirror and a laser resolver, the laser boresighting mirror is used for emitting laser beams, the laser resolver is installed on an aircraft target plate, a laser receiver of the laser resolver is used for splitting light, a vertical camera is installed at the top of the laser resolver, and the vertical camera is connected with a camera. A parallel camera is installed at the rear end of the laser resolving instrument, the laser receiver divides a received laser beam into two light beams perpendicular to each other, and the two light beams are transmitted to the vertical camera and the parallel camera respectively. Compared with the prior art, the device does not need a tedious aircraft leveling process, remarkably reduces the operation complexity, adopts an advanced laser image detection technology and a high-precision sensor, can realize high-precision fixed-axis measurement, adopts a near-infrared band CCD (Charge Coupled Device) industrial camera, is provided with a narrow-band optical filter at the front end, can effectively filter the interference of environmental visible light, and is high in measurement precision. The pose of the target plate is automatically adjusted through automatic calculation of an algorithm, and personal errors are reduced.

The invention discloses an immersed tube butt joint installation method and system based on laser ranging and visual recognition, and belongs to the technical field of ocean engineering. The method comprises the steps that a laser target set is installed on the butt joint end face of an installed pipe joint, and a laser positioning set and a laser projector are installed on the butt joint end face of a to-be-installed pipe joint; after the to-be-installed pipe joint sinks, the laser positioning group is started to measure the distance to the target group in real time, meanwhile, parallel light beams are emitted to the other end face of the to-be-installed pipe joint through the laser projector, and the position of a light spot is collected through visual recognition to obtain posture deviation; the distance and deviation data are fused, the optimal pose of the pipe joint to be installed is calculated through an optimization algorithm, and then the offset of the end face center and the axis deflection angle are obtained; and according to the parameters, a regulation and control instruction is generated, and the ballast water system and the winch system are controlled to adjust the posture of the to-be-installed pipe joint till accurate butt joint is achieved. According to the invention, full-underwater, high-precision and automatic immersed tube butt joint is realized, and the dependence on an overwater measuring tower and a GPS (Global Positioning System) is eliminated.

The invention relates to the technical field of laser measurement and photoelectric detection, and discloses a laser boresight equipment high-precision calibration method and system based on region segmentation mapping, and the method comprises the steps: firstly collecting a standard grid frosted glass target plate image, extracting grid intersection point pixel coordinates through employing an SURF algorithm, and building a data set corresponding to physical coordinates; dividing the field of view into a plurality of sub-regions, and respectively resolving a perspective transformation matrix mapped from a pixel coordinate system to a physical coordinate system; secondly, collecting a light spot image, performing initial positioning by using a Canny operator and a least square method, fitting a sampling sequence through a Sigmoid function, and extracting edge sub-pixel coordinates in combination with a central difference method; and finally, calling a corresponding transformation matrix according to the sub-region where the light spot is located to obtain physical coordinates, and calculating the light spot jerk value, the maximum diameter and the included angle between the optical axis and the mechanical axis. According to the invention, image distortion is compensated through view field partition mapping, and the calibration precision and detection efficiency of the laser boresight equipment are improved in combination with a sub-pixel positioning technology.

The method and device for mapping the local irradiation flux of laser target shooting based on phase plate positioning belong to the field of laser target shooting experiments. The present invention aims to solve the problem that the flux data in the existing optical element damage test analysis only uses the average flux as the result, and cannot achieve the correspondence between the target surface beam flux and the damage point. The present invention includes a calibration step for obtaining an affine transformation matrix and a step for performing a laser target shooting experiment to obtain the local irradiation flux of the target material. A phase plate is inserted between the lens and the target material in the target shooting experiment optical path, an array of damage points is formed on the rear surface of the target material, and an affine transformation matrix is ​​constructed. The phase plate is removed and the laser target shooting experiment is performed using the original experimental optical path; the near-field image of the target shooting laser beam is mapped to the target material damage image according to the affine transformation matrix, and the near-field image of the target shooting laser beam and the target material damage image are superimposed to obtain the position of the phase mark point corresponding to the target material damage point; and then the local irradiation flux of the laser target shooting at the location of each damage point on the target material is obtained.

The invention discloses a shield tunneling machine attitude deviation measurement method based on laser-vision deep learning heterogeneous fusion, and the method comprises the steps: employing double sensors of a laser target and a vision camera, carrying out the deployment of the sensors, and collecting data, which comprises laser data and vision data; preprocessing the data, wherein the preprocessing comprises laser data preprocessing and visual data preprocessing; the laser data preprocessing comprises laser data coordinate conversion, laser target attitude deviation calculation and noise filtering; the visual data preprocessing comprises image preprocessing, mark point detection, camera calibration and world coordinate calculation, and visual measurement attitude deviation calculation; a deep learning heterogeneous fusion model is constructed, the deep learning heterogeneous fusion model comprises a laser absolute feature branch, a visual spatial-temporal feature branch, an attention fusion layer and an output layer, and the model is trained; and inputting the preprocessed real-time data into the trained deep learning heterogeneous fusion model, and carrying out dynamic calibration on an output result.

A firearm accessory device removably attachable to a firearm. The accessary device including a laser targeting finger stop assembly for coupling to a handguard, forestock, barrel or accessory rail of a firearm. The finger stop device may include a light source, such as a laser module, and a power source housed within the device. In embodiments, the device may further include one or more activation devices operably and electrically connected to the illumination device and positioned at one or more access openings forwardly and / or rearwardly oriented in a body portion of the device.

The utility model discloses an anti-seismic whole-process measurement station-changing-free guiding device, which belongs to the technical field of accurate attitude measurement and guiding of tunneling equipment, and comprises a shield tunneling machine, a shield tunneling trolley, a total station, a laser emitting device, a multi-path double-screen laser target and a rearview prism, the shield tunneling trolley is arranged on one side of the shield tunneling machine, and the total station is arranged on the other side of the shield tunneling machine. The laser emitting device is mounted at the bottom of the total station; a relation is established through the total station, the adjustable laser transmitter, the multi-path double-screen laser target and the rearview prism, when the system works, the adjustable laser transmitter keeps a fixed transmitting angle to irradiate the multi-path double-screen laser target, the multi-path double-screen laser target collects a laser azimuth angle at a high frame frequency, and the total station measures the rearview prism in real time in a tracking mode. The method has the advantages that the system has shock resistance, and when the trolley vibrates, the optical path of the adjustable laser transmitter and the total station measure the rear-view orientation relationship synchronously change during vibration, so that the influence of vibration on the measurement result is solved.

The invention provides a method for measuring and compensating drifting and jittering of the position of an X-ray source, and relates to the technical field of X-rays. The method for measuring and compensating the drift and jitter of the X light source position comprises the steps that the original point of the initial position of the X light source driven by a laser plasma accelerator is collected; collecting the real-time jitter offset of the X light source in the application time; counting a real-time jitter offset, and calculating to obtain an average jitter offset within a specified time; the position of the laser target spot is adjusted according to the average jitter offset, so that the offset of the X light source is fed back and pre-compensated; and correcting a corresponding result generated by the X light source through data post-processing. According to the invention, through the synergistic effect of the method for adjusting the position of the laser target spot and the method for post-processing the data, the high-frequency jitter of the average jitter offset and the real-time jitter offset generated in the application process is compensated and corrected, and the precision and accuracy of the obtained result are improved.

The utility model discloses a multi-degree-of-freedom deformation monitoring and maintaining device for a bridge support. The multi-degree-of-freedom deformation monitoring and maintaining device comprises a support displacement sensor, a contact type displacement sensor, a laser sensor and a laser target, the support displacement sensor is vertically arranged on the padstone, and a measuring rod of the support displacement sensor is connected with the main beam; the contact type displacement sensor is horizontally installed on an abutment through a support, and the contact end of the contact type displacement sensor makes contact with the outer side face of a main beam. The laser sensor is arranged on the support. A support displacement sensor and a laser sensor form a support compression deformation measurement system, the overall compression deformation and deflection angle of the support can be accurately represented, and the support void phenomenon can be found in time; and the relative shearing displacement of the main beam and the abutment is detected through the contact type displacement sensors and the laser sensors on the adjacent edges. The device has better anti-interference capability, can provide measurement data with high reliability in real time, and can strictly control the jacking of the bridge when the bridge is replaced.

The utility model discloses a laser axis determination instrument structure, which belongs to the technical field of laser boresighting, is used for receiving laser beams emitted by a laser boresighting mirror, and comprises a laser receiving assembly, a top shooting assembly and a tail shooting assembly, two vertical plates are symmetrically mounted on two sides of the bottom plate, and a spectroscope is fixed in a space formed by the base and the vertical plates; the spectroscope divides a laser beam emitted by the laser borescope into two light beams which are perpendicular to each other, and the two light beams are transmitted to the top shooting assembly and the tail shooting assembly respectively. Compared with the prior art, the device comprises the two groups of shooting assemblies which are perpendicular to each other, and can obtain a light spot image with a clear outline and a proper size by using optical glass and a CCD camera group, so that the deviation distance and the deviation angle can be conveniently calculated in the later period. In addition, the structure adopts a modular and combined design, and the joints are connected by flanges or threads, so that components with different specifications can be flexibly replaced, and later maintenance is also facilitated.

The present invention proposes a device for monitoring the upward and downward movement of a scraper conveyor on a coal mining working face, which mainly includes a push stroke sensor, a first laser rangefinder, a second laser rangefinder, a third laser rangefinder, a laser target receiver, and a data analysis device; the push stroke sensor is used to monitor the push stroke of the end hydraulic support push jack; the first laser rangefinder and the second laser rangefinder are used to measure the distance between the front end and the rear end of the end hydraulic support base and the side wall of the tunnel respectively; the third laser rangefinder is used to monitor the horizontal offset of the push rod; by analyzing the monitoring data of the push stroke sensor, the first laser rangefinder, the second laser rangefinder, and the third laser rangefinder, it can be calculated whether the scraper conveyor has upward and downward movement, and the cause of the upward and downward movement can be analyzed.

The utility model belongs to the technical field of optical imaging equipment, and relates to a portable laser target simulator which comprises an installation shell, a laser target simulator body and a Picatinny guide rail, movable openings are symmetrically formed in the bottom of the installation shell, a rectangular plate is connected between the inner walls of the two sides of the two movable openings in a sliding mode, and the top of the rectangular plate extends into the installation shell. The bottom of the rectangular plate extends to the position below the mounting shell and is fixedly connected with clamping plates, the clamping plates are arranged in an L shape, and the picatinny guide rail is located between the two clamping plates. Through mutual cooperation of the mounting shell, the rectangular plate, the movable opening, the clamping plates, the multi-direction screw and the like, the multi-direction screw can be rotated, so that the two clamping plates clamp an imitation gun, and the imitation gun can be clamped through the picatinny guide rail; the purpose that the mounting shell and the laser target simulator body are mounted on the simulation gun is achieved, the laser target simulator body can be conveniently mounted and dismounted through clamping, and the problem that the laser target simulator and the simulation gun are integrated and inconvenient to carry can be effectively solved.

The invention provides a modal test method and device, a readable storage medium and a modal test component. The modal testing method is applied to a modal testing assembly, the modal testing assembly comprises a laser target and a laser tracking device, the laser target is arranged on a to-be-tested object, the laser tracking device and the laser target are correspondingly arranged, and the modal testing method comprises the steps that under the condition that the to-be-tested object is subjected to impact excitation, a force signal of impact excitation is obtained; performing laser tracking on the laser target through a laser tracking device, and determining a first displacement signal of the laser target; and determining a modal test result of the to-be-tested object according to the force signal and the first displacement signal. According to the embodiment of the invention, the detection efficiency and accuracy of modal testing are improved.

The present invention discloses a tower crane verticality detection method, including the steps of installation, remote control transposition, laser measurement, etc., and also discloses a detection device applied to the above detection method, including an annular laser target placed on the tower crane base and an annular fixture installed on the tower crane, the upper surface of the annular laser target is provided with scale lines, the bottom of the annular fixture is provided with an annular beveled tooth groove, and the annular fixture is provided with an annular sliding cavity. The present invention realizes multi-directional and multi-point detection by adopting annular mobile control detection, improves the measurement accuracy, and can quickly fix the annular fixture by isobaric clamping, so that the annular fixture can rise with the tower crane without additional lifting, and can quickly disassemble and assemble the laser detector for verticality detection through a detachable structure, the operation is simpler, the vertical angle can be quickly obtained by the position of the laser point on the annular laser target, and detection can be performed continuously without correction, which reduces the threshold for use.

The embodiment of the utility model provides a wide-area laser tracking target spot device. The wide-area laser tracking target spot device comprises a mounting seat and a plurality of target spot bases, the target spot base is of a semi-cylindrical structure, and a reflector is arranged on the rectangular plane of the target spot base and used for reflecting detection laser; the semicircular planes of the target spot bases are spliced with each other, and the rectangular planes of the two adjacent target spot bases are staggered with each other, so that the reflectors can reflect the detection laser at multiple angles; and one side of the mounting seat is connected to the semicircular plane of the target spot base at one end, and the other side of the mounting seat is mounted on the flexible measuring bracket so as to fix the mounting seat and the target spot base. According to the design, through a laser scanning principle and target point global tracking, a traditional target point which can only be detected in a single direction is creatively changed into a target point which can be detected in a full circumferential direction. Besides, the target spot can be detected in the whole circumferential direction, and no matter how the scanner moves, enough effective target points always exist in the space, so that loss and layering of measurement data are avoided, and the result precision is ensured.

The invention relates to a positioning device (3) for positioning metal profiles (2) to be attached to a support structure (1) for drywall construction, comprising a base body (4) with an end plate (5) having an end surface (6) designed to establish a magnetic connection to the metal profile (2), wherein a first scale (9, 10, 11 / 11', 12) is arranged on a broad side surface (8) of a broad side plate (7) of the base body (4) arranged perpendicular to the end plate (5). According to the invention, at least one narrow plate (13, 13') is provided, arranged perpendicular to the broad side plate (7) and perpendicular to the end plate (5), each with at least one broad side surface (14) having a second scale (15).

The invention relates to a positioning device (3) for positioning metal profiles (2) to be fastened to a support structure (1) for drywall construction, comprising a main body (4) with an end plate (5), which has an end face (6), which is designed to produce a magnetic connection to the metal profile (2), wherein a first scale (9, 10, 11 / 11', 12) is arranged on a broad-side face (8) of a broad-side plate (7) of the main body (4), which broad-side plate is arranged at a right angle to the end plate (5). According to the invention, at least one narrow plate (13, 13') is provided which is arranged perpendicular to the broad-side plate (7) and perpendicular to the end plate (5) and has a respective at least one broad-side surface (14) having a second scale (15).

The application discloses a kind of laser semi-active seeker testing system and method, system includes: optical platform, laser target simulation unit, seeker fixed seat, three-axis turntable and stepper motor etc.Modular.The laser target simulation unit is used to simulate the real echo signal generated after laser irradiation to target;The seeker fixed seat is installed on three-axis turntable, three-axis turntable is installed on optical platform and is driven by stepper motor.Laser target simulation unit, laser semi-active seeker and stepper motor are respectively connected with host computer communication.The application is applicable to miniature laser semi-active seeker, and can test the working distance, field angle, responsivity and multiple performance parameters of miniature laser semi-active seeker synchronously.