3450 results about "Laser transmitter" patented technology

The invention discloses a pipeline all-position multi-layer multi-channel TIG welding bead morphology measuring device and method, and relates to the technical field of intelligent welding. A molten pool image collecting module is used for collecting morphology information of a molten pool, and the light emitting end of a laser transmitter is used for facing a welding bead; the active and passive vision module is used for collecting an image of light emitted by the laser emitter projected on a weld pool groove and identifying a weld bead corner opening position and a weld bead width, and the active and passive vision module and the weld pool image collecting module are both electrically connected with the control module; the control module can fuse image features collected by the active and passive vision module and the molten pool image collection module, the axes of the molten pool image collection module, the welding module and the active and passive vision module are located in the same plane, and the molten pool image collection module and the active and passive vision module are located on the two sides of the welding module respectively. According to the method, manual participation in the welding process can be reduced, the welding automation degree is improved, and meanwhile, the welding bead morphology measurement accuracy is improved.

The present invention discloses a laser positioning method and a robot based on image information. The execution subject of the laser positioning method is a robot equipped with a structured light module. The structured light module includes a line laser transmitter and a camera without an infrared filter, so that the imaging information of infrared light and the imaging information of visible light are retained in the image captured by the camera. The laser positioning method includes the following steps: the robot controls the camera to capture an image of light reflected back from the surface of an object to be measured by the line laser emitted by the line laser transmitter, and detects the brightness and darkness type of the image captured by the camera. When the robot detects that the current frame image captured by the camera is a bright frame image, the robot searches for the position of the line laser from the current frame image by executing an inter-frame tracking algorithm. When the robot detects that the current frame image captured by the camera is a dark frame image, the robot extracts the position of the line laser from the current frame image by executing a brightness centroid algorithm.

The invention relates to the technical field of pipeline detection, in particular to a fractured pipeline inner wall detection device and method.The fractured pipeline inner wall detection device comprises an upper computer and a crawling robot connected with the upper computer, and the crawling robot comprises a mounting base, a first driving assembly, a second driving assembly, a supporting assembly, a laser receiver, a laser transmitter, an image acquisition module and a control unit. The device is reasonable and compact in structure and convenient to use, the first driving assembly and the supporting assembly can enable the crawling robot to advance or hover in a detected pipeline, the laser transmitter and the laser receiver can measure the thickness of multiple detected points on the inner wall of the detected pipeline, and the detection accuracy is improved. The image acquisition module can shoot image information of the inner wall of the detected pipeline in real time, assists on-site operators in observing the quality of the inner wall of the detected pipeline, obtains a change diagram of abrasion of a rubber layer in the detected pipeline, and can predict the abrasion trend of the rubber layer of the detected pipeline in combination with on-site use construction data of the flexible fracturing pipeline.

The invention discloses a laser vision welding seam tracking method based on deep learning, and relates to the technical field of industrial welding, a structural light is used for calibrating a welding seam between workpieces, and an image sensor is used for analyzing welding seam data and controlling a welding moving path, and the method comprises the following specific steps that 1, the structural light is emitted to a welding plane; the structured light is captured by the image sensor after being reflected; 2, after an image of the image sensor is read by a system, filtering and denoising processing is carried out, and edge lines on the two sides of a welding seam are obtained; structured light is emitted to a welding plane through a laser emitter, coordinate information of the structured light is captured through an image sensor, continuously-collected image information is integrated to measure an edge line of a welding seam, a median curve of the welding seam is obtained through data fitting, and a welding gun moves along the calculated median curve of the welding seam. The precision of the welding gun moving along the welding seam is improved, and the problem of heat damage caused by the fact that the welding gun is too close to the welding face on one side is solved.

According to the metal plate self-adaptive straightening method and technology based on the line laser contourgraph, the laser scanning contourgraph is arranged above a feeding part of a straightening machine, a line laser transmitter and an image sensor are arranged in the laser scanning contourgraph, and the line laser transmitter projects laser lines to a metal plate; the image sensor is used for capturing a plate image with a laser reflection light strip to assist the straightening control system to adjust the pressing roller, straightening of the metal plate can be adjusted in real time, and the straightening precision is improved; image data collected by an image sensor is transmitted to a data processing module, and the data processing module analyzes an image to obtain actual contour data of a plate before straightening; the actual contour data are compared with a preset ideal straightened plate contour model, the deviation value of each point is calculated, and a deviation matrix is generated; the straightening machine control system controls the position conditions of all the pressing rollers independently according to the deviation matrix, the accuracy of plate straightening can be greatly optimized, and continuous adjustment can be achieved.

The invention relates to the technical field of laser processing, in particular to a double-laser processing device. Comprising a first laser transmitter and a second laser transmitter, the laser engraving machine further comprises a laser engraving head, a rear reflector switching mechanism, a middle reflector switching mechanism and a front reflector adjusting mechanism. The front reflector adjusting mechanism comprises a first front reflector, a second front reflector and a front adjusting mechanism; the middle reflector switching mechanism comprises a first middle reflector, a second middle reflector and a middle switching mechanism; the rear reflector switching mechanism comprises a first rear reflector, a second rear reflector and a rear switching mechanism. By arranging the reflector switching mechanism, when different lasers need to be used, the corresponding reflectors are switched, the absorption loss of the lasers can be effectively reduced, and the laser utilization rate is improved.

The invention relates to the technical field of industrial laser precision measurement, in particular to a laser centering device for a coupler and a using method of the laser centering device for the coupler. Light spot displacement signals and environment vibration signals are synchronously collected through a laser transmitter and an optical sensor array, and a frequency domain feature decoupling module is adopted to separate a shafting displacement component and an interference component; the time domain correlation verification module is used for calculating signal time sequence correlation and generating a deviation vector, and finally the adaptive compensation decision module is used for analyzing the deviation vector and outputting an adjustment instruction. According to the invention, effective separation of real misalignment and transient noise in a dynamic environment is realized, the technical problem of measurement misalignment of an existing laser centering device in a complex industrial environment is solved, and the coupling installation precision and the equipment operation stability are improved.

The invention discloses a point light source electron accelerator which comprises a sealing box body, a cathode, a laser emitter, a reflecting cover, a grid plate and a mounting plate, the mounting plate is erected in the sealing box body, a mounting hole is formed in the mounting plate, the cathode is mounted in the mounting hole, and the laser emitter is arranged in the sealing box body. The reflecting cover is arranged at the top of the mounting hole; the reflecting cover is a semi-spherical surface, a laser through hole is formed in the top of the semi-spherical surface, and the laser through hole is coaxial with the cathode; the transmitting end of the laser transmitter is aligned with the cathode; the grid plate is mounted below the mounting plate and is aligned with the mounting holes; and an electron outlet is formed below the grid plate. The invention provides a point light source electron accelerator, and the point light source electron accelerator provides a light and miniaturized electron accelerator design, so that the application field of the accelerator is wider.

A laser leveling assembly includes a level to indicate level along a variety of planes for a worker. A pair of first laser emitters is integrated into opposing ends of the level to emit a focused beam of light outwardly from the level onto a surface. A pair of clamps is provided which each has a first gripping element and a second gripping element. The first gripping element associated with each of the pair of clamps receives the level for attaching the pair of clamps to the level to receive a support object thereby facilitating the level to be affixed to the support object. A pair of second laser emitters is each integrated into a respective one of the pair of clamps to emit a focused beam of light outwardly from the respective clamp onto the surface for assisting the worker with visually identifying a level mark on the surface.

The invention relates to an ultraviolet laser focusing ionization fluid disinfection system and a disinfection machine, and the system comprises a fluid channel which is provided with a fluid inlet, a fluid outlet and a disinfection cavity, the disinfection cavity is internally provided with at least one group of optical fiber arrays, and the light emitting end of each optical fiber array is full of a cross section for fluid circulation; the output end of the ultraviolet laser emitter is connected to the input end of the optical fiber array, a focusing element is arranged at the light emitting end of each optical fiber, and ultraviolet laser is output by the optical fiber array and forms an ionization area in the disinfection cavity after passing through the focusing elements. An ultraviolet laser focusing ionization technology is adopted, an ionization focus with high energy density is formed, the ionization focus not only directly acts on fluid molecules at the focus, but also excites fluid in a peripheral area through the ionization effect, a wide ionization area is formed, harmful substances in the fluid are decomposed into harmless low-molecular compounds, and therefore the fluid concentration is improved. The efficient and thorough disinfection on the fluid is realized.

The cleaning equipment comprises a workbench, a conveying belt device, a height adjusting mechanism, a driving mechanism, a horizontal limiting mechanism and a laser transmitter, the conveying belt device and the height adjusting mechanism are installed on the upper side of the workbench, and the shoe mold products are stored on the upper side of the conveying belt device; the driving mechanism and the horizontal limiting mechanism are connected to one end of the height adjusting mechanism, the laser transmitter is connected to the output end of the driving mechanism and arranged relative to the shoe mold product, and the output end of the horizontal limiting mechanism is arranged relative to the driving mechanism. According to the design, shoe mold products are conveyed through the conveying belt device, meanwhile, the laser transmitter is matched for removing pollutants through laser, the laser transmitter is driven by the driving mechanism to reciprocate, the position of the laser transmitter is further adjusted through the height adjusting mechanism and the horizontal limiting mechanism, and therefore automatic cleaning of the shoe mold products is achieved; and the cleaning efficiency is high.

An optical emission array includes an optical input portion configured to provide a parent laser source for the optical emission array, and an optical output portion including a plurality of child laser emitters. Each child laser emitter of the plurality of child laser emitters is injection-locked to the parent laser source. The optical emission array further includes at least two optical distribution branches (i) disposed between the optical input portion and the optical output portion, and (ii) optically connecting at least two child laser emitters of the plurality of child laser emitters, respectively, to the parent laser source.

The invention discloses a corn planting breeding device which comprises a planting assembly, the planting assembly comprises a groove body, a plurality of drainage holes are formed in the groove body, a plurality of rectangular rods are fixedly connected in the groove body, a plurality of moving blocks are slidably connected to the rectangular rods, a plurality of moving frames are detachably connected to the moving blocks, and a plurality of planting boxes are placed in the moving frames. A plurality of partition plates are arranged in the moving frame, an ejection mechanism is arranged on the groove body, a conveying mechanism and a driving mechanism are arranged in the groove body, the moving frame is detachably connected with the driving mechanism, and the conveying mechanism is used for conveying planting boxes; the detection mechanism comprises a box body, the conveying mechanism penetrates through the box body, a laser transmitter and a laser receiver are arranged in the box body, the conveying mechanism is located between the laser transmitter and the laser receiver, and an air cylinder is arranged on the conveying mechanism. According to the corn breeding device, corn breeding is facilitated, corn seedlings can be screened conveniently after breeding is completed, the workload of manually selecting the corn seedlings is reduced, and breeding work is easier.

The invention relates to the technical field of optical measurement and metering equipment, in particular to an on-line precision calibration method for a laser line module in a high-low temperature environment, which comprises the following steps: acquiring horizontal and vertical offsets of a projection light spot of the laser line module, and collecting the temperature of the position of a laser transmitter; respectively calculating a horizontal offset interference degree and a vertical offset interference degree at each acquisition moment, and further obtaining a horizontal interference ratio and a vertical interference ratio; according to the change trend of the horizontal offset interference degree and the vertical offset interference degree within the preset duration before each acquisition moment, the horizontal and vertical interference variation of each acquisition moment is obtained, and then the compensation regulation factors of the horizontal offset and the vertical offset of each acquisition moment are obtained, and the horizontal offset and the vertical offset are compensated. And compensation correction values of the horizontal offset and the vertical offset are obtained, so that the projection precision of the laser line module is calibrated. According to the invention, the precision of projection calibration of the laser line module can be improved.

The invention discloses a device for detecting the surface flatness of a semiconductor by using laser, and relates to the technical field of semiconductor detection, the device comprises a base, the upper end of the base is fixedly connected with a mounting seat, the upper surface of the base is provided with a through groove, a laser emitter and a fixed seat, the laser emitter is arranged on the mounting seat, and the fixed seat is fixedly connected with the mounting seat. The fixing base is arranged on the upper surface of the base, and a transmission mechanism is arranged in the fixing base. Through the servo motor, the transmission case, the ball screw and the screw nut, the workbench can be driven to move, so that the semiconductor material above moves along the horizontal axis, the position of the laser emitter is driven to be adjusted in cooperation with the contraction of the hydraulic oil cylinder, and finally emitted laser points traverse the surface of the semiconductor. The flatness state of the semiconductor surface is judged according to the position of the laser point received by the target, the influence of machine body vibration on semiconductor flatness detection is avoided, the detection precision is high, and the working efficiency is improved.

The invention relates to the technical field of security and protection monitoring, in particular to a park building visual security and protection monitoring management system which comprises a plurality of monitoring devices and a plurality of display devices, laser emitters with freely adjustable irradiation angles are arranged below the monitoring devices, the park building visual security and protection monitoring management system further comprises a smoke recognition unit, independent analysis is carried out on each monitoring device, and the smoke recognition unit is connected with the monitoring devices. Monitoring images are collected regularly, a plurality of continuously collected images are compared and analyzed, and smoke generation, a smoke area and a smoke diffusion direction are identified; the smoke analysis unit is used for analyzing and calculating a smoke concentration index based on the brightness of the visible light path, analyzing a smoke thickness index based on the space coordinate of each end point of the visible light path, and calculating a smoke diffusion index based on the smoke concentration index and the smoke thickness index; and the area evacuation unit is provided with a plurality of escape channel maps in advance, and the display colors and the color depths of different areas in the escape channel maps are adjusted based on the smoke diffusion indexes.

The invention relates to a coated paper film thickness measuring device, and relates to the technical field of film thickness measurement, the coated paper film thickness measuring device comprises a workbench, two side plates, four mounting seats and two back plates, the two side plates are vertically fixed on the left side and the right side of the upper surface of the workbench, and every two of the four mounting seats form a group; the two groups of mounting seats are respectively fixed with the upper surface of the workbench and the top ends of the two side plates, the two back plates are both located at the rear side of the workbench and are fixed with the ground, and the mounting seats are provided with thickness measuring mechanisms for measuring the thickness of a coated paper film. According to the coated paper film thickness measuring device, the horizontal position of the photoelectric detector can be accurately controlled through the linear module, automatic alignment of the photoelectric detector on the movable plate is achieved through the laser transmitter and the laser receiver, and the moving distance of the movable plate is monitored in real time through the photoelectric displacement sensor; therefore, under the cooperation of the laser transmitter and the laser receiver with the photoelectric displacement sensor, the two photoelectric detectors are always kept in high-precision alignment.

The invention discloses a steel plate contour dimension measurement method based on a surface detection platform, and belongs to the technical field of machine vision detection, and the method comprises the steps: transforming the surface detection platform, installing a laser transmitter between every two adjacent cameras in the same group of cameras in the surface detection platform, a modified surface detection platform is obtained; wherein light spots projected to the measured steel plate by each laser generator can be simultaneously collected by the cameras on the two sides of the laser generator; a preset calibration plate is adopted to calibrate each camera in the modified surface detection platform; acquiring a surface image of the detected steel plate by using the calibrated group of cameras; and calculating the overall dimension of the measured steel plate based on the surface image of the measured steel plate. According to the invention, the overall dimension of the steel plate is measured, the cost can be effectively reduced, and higher measurement precision can be obtained by using the high-resolution image of the surface detection platform.

The invention belongs to the technical field of laser scanning detection, and provides a vertical fixed-point test piece laser scanning detection device and a detection method thereof.The detection device comprises a driving supporting assembly, a laser emitting assembly and a laser receiving assembly, and the driving supporting assembly comprises a base, a lifting platform, a power supply module, a lifting lead screw, a fixed joint, a sliding joint and a driving motor; the first connecting rod of the laser emitting assembly and the third connecting rod of the laser receiving assembly are rotationally connected with the sliding joint. The driving motor drives the lifting lead screw to rotate and drives the sliding joint on the lifting lead screw to vertically move, the multi-connecting-rod mechanism adjusts the angle between the laser transmitter and the laser receiver under the cooperation of the sliding joint and the fixed joint, and the angle can be automatically and accurately determined within a certain space angle. And the fixed angle detection and the parallel angle detection can be quickly switched, so that the detection of the laser single-path transmitting and receiving type fixed-point test piece is realized.

The invention relates to the technical field of data processing, in particular to a method for monitoring the running state of a laser transmitter, and the method comprises the steps: obtaining the multi-dimensional parameters of the laser transmitter, determining the instantaneous abnormal index of the laser transmitter at the current moment according to the variable quantities and change rates of the voltage and current of the laser transmitter at the current moment, and determining the running state of the laser transmitter according to the instantaneous abnormal index. Determining the sum of the relative decrease degree of the electro-optical conversion efficiency of the laser transmitter at the current moment and the relative increase degree of the waste heat as a performance degradation index of the laser transmitter at the current moment; and determining the product of the performance degradation index of the laser transmitter and the instantaneous abnormal index of the laser transmitter at the current moment as a health degree index of the laser transmitter at the current moment, and monitoring the running state of the laser transmitter in real time according to a comparison result of the health degree index and a preset health degree index threshold value. According to the method, the accuracy of monitoring the running state of the laser transmitter is improved.

A measurement system including: a. a sensor system that includes: i. a Light Detection And Ranging (LiDAR) module with a laser emitter configured to generate measurement data representing raw range measurements to measure heights of a crop, and ii. a computing module, including: at least one wireline / wired communications module configured to communicate with the LiDAR module for the computing module to acquire the measurement data from the LiDAR module; and at least one wireless communications module configured for the computing module to communicate using a wireless connection / link with a remote computing system that is configured receive the acquired measurement data and to determine / calculate / estimate phenotypic quantities of the crop based on the measured heights for the purpose of high-throughput plant phenotyping (HTPP); and b. a mobile / vehicle mount configured to hold / support the sensor system above the crop and to direct the laser emitter towards the crop.

The invention relates to a dust-free cutting device for processing metal parts of textile machinery, which comprises a cutting main body mechanism, the cutting main body mechanism comprises a welding base, a protective cover, a cutting arm hinging base, a cutting arm hinging shaft seat, a cutting arm, a tail hinging plate, a stretching air cylinder, a laser transmitter, a main rotating motor base, a main rotating motor, a hollow chuck and a driving belt wheel; the protective cover is fixedly arranged on the welding base, the cutting arm hinge bases are fixedly arranged in the middle of the top face of the welding base, and the number of the cutting arm hinge shaft seats is two. The standards of cutting depth and cutting precision are improved; and the smoke adsorption effect is improved, the smoke absorption rate generated in the cutting process is increased, and therefore harm to workers caused by dust and smoke in equipment when equipment protection is opened for feeding and discharging is effectively relieved.

The invention relates to the technical field of laser machining, in particular to galvanized ventilating duct machining equipment which comprises a machining table, a fixing structure, a marking structure and a transmission structure are installed on the machining table, the fixing structure comprises a rotary ring, two pairs of clamping plates and two sets of driving assemblies, and the rotary ring is rotatably installed on the machining table; the marking structure comprises a lifting frame, a guide rail assembly and a laser transmitter, the lifting frame is slidably mounted on the machining table in the vertical direction, the guide rail assembly and the laser transmitter are mounted at the upper end of the lifting frame, and the transmission structure is used for being in transmission connection with the lifting frame and a driving rod located at the bottom of the rotary ring. The device comprises four sets of guide wheels, a transmission plate and a fixing plate, the two pairs of clamping plates and the rotatable rotary ring can automatically adjust the printing face of the square pipeline, and meanwhile the working height of the laser transmitter in the lifting frame can be correspondingly and automatically matched according to adjustment of the printing face of the square pipeline.

The device comprises a box body and a measuring assembly arranged in the box body, the measuring assembly comprises a laser emitting unit, a lens unit, a focal length adjusting unit and a height adjusting unit, the height adjusting unit is arranged on the upper side in the box body, and the focal length adjusting unit is arranged at the bottom of the height adjusting unit. The laser emitting unit is arranged at the bottom of the focal length adjusting unit, and the lens unit is arranged at the bottom of the focal length adjusting unit and located on one side of the laser emitting unit. Through the collaborative design of the convex lens and the laser emission unit, the optical path reversibility principle of the convex lens is utilized, and dependence on a small-size and low-emission-port-height special-specification laser emitter is not needed. Even if a laser transmitter with a conventional size is adopted, refracted laser can be infinitely close to the ground, and tiny protrusions can be accurately recognized and measured.

The invention belongs to the technical field of sand mill equipment, and provides a sand mill filter screen cleaning system which comprises a sand mill body, a detection module, a cleaning module and a control module. The sand mill body comprises a feeding hole, a discharging pipeline, a stirring main shaft, a sleeve, a rotatable frame and a metal filter cartridge; the detection module comprises an X-ray emitter, an X-ray receiver and an image transmission assembly and is used for performing 360-degree full-coverage scanning detection on the surface of the metal filter cartridge and generating and transmitting a detection image to the control module; the cleaning module comprises a laser transmitter and a sliding groove type moving device. The control module comprises a PLC and a central control processor and is used for receiving the detection image, judging the cleaning requirement, controlling the cleaning module to clean the surface of the metal filter cartridge and starting secondary detection after cleaning is completed. According to the sand mill filter screen cleaning device, automation and intelligence of sand mill filter screen cleaning are achieved.

The utility model discloses a numerical control double-flame continuous casting width-adjusting hot slab cutting machine, which relates to the technical field of slab continuous casting cutting and comprises a pair of slide rails, a heavy cutting table fixedly arranged between the pair of slide rails, a numerical control flame cutting machine slidably arranged on the pair of slide rails, a laser transmitter arranged on one side of each slide rail and a laser receiver arranged on the other side of each slide rail. The laser emitter is started to generate two parallel rays on the plate blank, the two parallel rays can be irradiated on the plate blank through the laser emitter, the cutting position of the numerical control flame cutting machine is adjusted by referring to the laser rays on the plate blank, workers do not need to use a ruler to approach to carry out manual measurement, and the working efficiency is improved. The two cutting guns are controlled by the numerical control flame cutting machine to cut the obliquely-placed plate blank, the inclined plate blank does not need to be straightened, the position marked by the laser rays and the cutting position of the continuous casting cutting machine do not need to be compared in the cutting process, the accuracy of length measuring and sizing can be rechecked, and the cutting precision is guaranteed.

The invention provides an unmanned aerial vehicle laser obstacle clearance system and method for improving laser obstacle clearance efficiency, the obstacle clearance system comprises an unmanned aerial vehicle, an airborne computer carried on the unmanned aerial vehicle, a stability augmentation holder, a holder camera and a laser transmitter, and the unmanned aerial vehicle, the holder camera and the laser transmitter are all fixed on the stability augmentation holder; the pan-tilt camera is used for collecting a trunk swing video stream in real time and transmitting the video stream to the visual module of the airborne computer; the visual module extracts tree trunk skeleton tracking points in the video stream; a control module of the airborne computer generates a holder direction control instruction and a laser trigger signal according to the tracking point coordinate position; the stability augmentation holder carries out real-time attitude adjustment according to the holder direction control instruction; and the laser emitter performs laser cutting on the swing tree trunk after receiving the laser trigger signal. According to the invention, real-time tracking of the target local area of the swing tree trunk is realized by using the unmanned aerial vehicle and the tracking algorithm, and the laser obstacle removing precision and the temperature rising efficiency are improved.

The invention discloses a recycled plastic recycling device, and relates to the technical field of recycled plastic production, the recycled plastic recycling device comprises an equipment box, a plastic bottle guiding and conveying assembly is installed in the side end of the equipment box, and an annular electric control rotating guide rail drives an adjusting swing arm to rotate slowly under the cooperation of a bottle processing assembly; the laser sensor at the bottom end of the adjusting swing arm and the laser emitter work synchronously, emitted laser beams conduct 360-degree laser cutting around the bottle opening, the miniature electromagnetic lifting rod drives the bottle head electric clamping piece to descend, the cut bottle opening is accurately clamped, the situation that the granularity of plastic particles is not uniform due to excessive breaking is avoided, and the service life of the bottle opening is prolonged. And under the cooperation of the vacuum guiding and conveying chamber, the microwave drying chamber and the ultrasonic cleaning chamber, cleaning and drying of the plastic particles are ensured, high-quality raw materials are provided for subsequent granulation, the forming quality of the regenerated plastic particles is improved, the defective rate is reduced, the production efficiency is improved, and the requirement for large-scale industrial production is met.

The invention relates to the technical field of flange planeness measurement, and provides a flange precision detection platform, which comprises a laser transmitter and a laser receiver, and comprises a moving seat, a laser transmitter, a laser receiver, a laser transmitter and a laser receiver, the sliding block is slidably arranged on the movable base and gets close to or away from the axis of the flange after sliding. The rotating frame is rotationally arranged on the sliding block; the clamping seat is arranged on the rotating frame, rotates along with the rotating frame, and sleeves the laser receiver in a clamping manner; the mounting seat is rotationally arranged at the upper end of the laser transmitter; the winder is arranged on the mounting seat, a stay wire is wound on the winder, the end part of the stay wire is connected with the rotating frame, and the winder provides pulling force for the rotating frame through the stay wire, so that the receiving end of the laser receiver is opposite to the laser transmitter. According to the technical scheme, the problem that the detection efficiency is affected due to the fact that the laser receiver and the laser transmitter cannot be automatically opposite in the existing flatness measurement technology is solved.

The invention belongs to the technical field of laser cutting, and particularly discloses a laser pipe cutting machine for pipe fittings for tunnel construction, which comprises a laser cutting head and a laser transmitter positioned at the top of the laser cutting head, the laser transmitter is mounted at the front side part of a frame plate through a lifting device, a bottom plate is arranged at the bottom of the frame plate, and a bottom frame is arranged at the top of the bottom plate. Two parallel rollers are arranged at the top of the underframe, a hose is placed at the tops of the rollers, and the bottom end of the laser cutting head corresponds to the circumferential outer side face of the hose. By pulling the hose to move leftwards, the left side end of the hose is gradually placed on the tops of the rolling wheels of the two cross rods, the upper frame moving downwards extrudes the top of the hose through cooperation of the two limiting sleeves, the bottom frame supports the hose through cooperation of the two rotating rollers, and the upper frame extrudes the left side end of the hose through the rolling wheels on the surfaces of the inserting rods; the two rotating rollers and the two limiting sleeves enable the hose to be in a horizontal state, and the hose is prevented from being in a bent or curled state in the rotating process.