699 results about "Laser sensor" patented technology

The invention relates to a method and device for measuring pitch deviation based on a line laser sensor, and the method comprises the following steps: S1, calibrating the position of the line laser sensor, and obtaining the coordinate value of a coordinate system of the line laser sensor in a measurement coordinate system; s2, installing a tested gear; s3, adjusting the relative position of the line laser sensor and the measured gear; selecting a measured position in the tooth surface area of the gear teeth of the measured gear, adjusting the position of the line laser sensor, and recording the sum of the offset of the adjusted line laser sensor relative to the center of the measured gear along the x axis and the y axis in the effective measurement range of the line laser sensor at the measured position; s4, performing zero returning operation on the angle sensor of the rotating shaft of the tested gear; and S5, controlling the detected gear to rotate along the center line of the detected gear. According to the method and the device, the pitch deviation can be measured in a non-contact mode, excessive calibration and leveling are not needed before detection, and the measurement efficiency and the measurement precision are both improved.

The invention discloses a laser sensor welding seam tracking method, and relates to the technical field of welding seam tracking, and the method comprises the following steps: S1, point position adjustment: enabling the measurement range of a laser ranging module to cover a to-be-measured welding seam area by adjusting the point position of a welding robot; and S2, measuring the Z-direction distance of the welding seam, emitting a laser pulse through a laser ranging module, receiving light reflected from the surface of the welding seam, and calculating the Z-direction distance of the welding seam based on the round-trip time of the laser pulse. A two-dimensional contour image of a welding seam is converted into a three-dimensional welding seam contour model, through an image processing and pattern recognition algorithm, the specific position and shape of the welding seam are extracted to accurately recognize the welding seam, high-precision positioning and dynamic tracking of the welding seam are achieved, it is ensured that a welding seam path is located in an optimal measurement area all the time, and the leakage detection risk is reduced.

The invention relates to the technical field of lithium battery processing, in particular to a semi-solid lithium ion battery core lamination correction device which comprises a rack, a pole piece correction mechanism, a negative pressure adsorption mechanism and a manipulator. During working, the manipulator places a pole piece on the correction platform, and the sensor detects the position deviation of the pole piece; then, a first alignment module and a second alignment module of the pole piece correction mechanism alternately move in the diagonal direction of the correction platform, force is sequentially applied to the two adjacent sides of the pole piece, and the pole piece is gradually corrected to the reference position. After correction, the surface state of the pole piece is detected through a laser sensor or a CCD, and if warping exists, the negative pressure adsorption mechanism applies uniform adsorption force through the negative pressure holes in the correction platform, so that the pole piece is flatly attached to the table top. According to the device, position correction and surface leveling are carried out step by step, action interference is prevented, the control precision and reliability are improved, meanwhile, metal scraps on the surfaces of pole pieces can be removed through negative pressure adsorption, the uniformity of the internal structure of a laminated battery cell is effectively improved, and the performance and the service life of the battery are improved.

The invention relates to the technical field of industrial measurement, and discloses a cylinder inner wall detection method and system based on a standard jig. The method comprises the following steps: acquiring scanning point cloud data of a standard circular tube jig; a radial deviation sequence is calculated based on the known inner diameter, cosine function fitting is carried out, and an eccentric parameter is calculated to carry out XY-axis iterative correction; calculating a laser inclination angle based on the corrected jig point cloud; obtaining the mixed point cloud, and segmenting the mixed point cloud into a jig point cloud set and a workpiece point cloud set based on the radial distance; calculating a mapping coefficient and performing coordinate conversion on the workpiece point cloud; and performing circular ring fitting by using a least square algorithm to output an inner diameter detection result. The problem of an inner wall imaging blind area is solved by obliquely installing the line laser sensor, and relative measurement is achieved through the standard jig to eliminate system errors.

The invention discloses an intelligent illegal behavior identification method and system based on multi-algorithm fusion, and relates to the technical field of image analysis. The method comprises the steps of collecting a region image sequence, identifying real-time personnel density information, adjusting the scale of a laser curtain wall region based on the personnel density information, forming a self-adaptive monitoring boundary, when a laser sensor detects an intrusion event, recording the intrusion moment and intrusion characteristics, calling an intrusion region image set, and obtaining the intrusion region image sequence; and analyzing the intrusion area image set by adopting an ensemble learning-based violation behavior recognition network group to obtain an interactive violation behavior recognition result, fusing the interactive violation behavior recognition result with the intrusion characteristics, introducing personnel density information to carry out environment adaptive compensation calculation, and outputting a final violation behavior recognition result. According to the invention, through fusion of image analysis, laser triggering and environment perception, high-robustness and high-accuracy intelligent identification of illegal behaviors in scenes such as subway security check is realized.

The invention discloses handheld steel fireproof door fireproof performance in-situ nondestructive testing equipment and a use method, and belongs to the technical field of fireproof door fireproof performance determination. In order to solve the problems that an existing method lacks an effective in-situ nondestructive testing means and the actual fire resistance of a fireproof door in use cannot be accurately judged, handheld in-situ nondestructive testing equipment for the fire resistance of the steel fireproof door is designed, during testing, electric suction cups on the two sides of the equipment are adsorbed to the fireproof door, and a laser sensor rapidly measures the thickness of the fireproof door; the ultrasonic eddy-current sensor is used for measuring fireproof door steel plate thickness; the X-ray sensor is used for measuring the compactness of the fireproof door filling material by using the X-ray propagation time; and comparing the measured data with a qualified fireproof door to obtain the fireproof performance of the measured fireproof door. Compared with the original fireproof door sampling detection equipment and method, the equipment and method can realize portable in-situ nondestructive detection, quickly judge the performance of the fireproof door, prevent inferior products from entering the market and protect the property and life safety of people.

The application discloses a robot area traversal method and belongs to the field of intelligent robots. The method first judges whether a feedback signal of a laser sensor is received when the robot receives a start signal for starting traversal, and when the feedback signal of the laser sensor is not received, the robot can rely on sensors such as a photosensitive sensor, a gyroscope and an odometer to perform area traversal in a non-laser navigation mode, so as to clean the bottom area of furniture with a relatively low bottom space, thereby improving the application range of the robot and remarkably improving practicability.

The utility model discloses an on-line thickness measurement identification device for laser welding materials, which relates to the technical field of laser ranging and comprises a conveying line, fixing frames are fixedly mounted on two sides of the conveying line, adjusting columns are symmetrically mounted on the surfaces of the fixing frames, a vertical positioning rod is mounted on the adjusting column on one side, and a vertical lead screw is mounted on the adjusting column on the other side. The periphery of the lead screw is in threaded connection with an adjusting frame, the side, away from the lead screw, of the adjusting frame is slidably connected with the periphery of the positioning rod, and air cylinders are symmetrically installed at the bottom of the adjusting frame and connected with laser sensors. According to the device, the laser sensor is adopted to automatically measure the thickness of the plate, traditional manual measurement is replaced, the measurement precision and the measurement efficiency are effectively improved, the plate is compacted and flattened in cooperation with the pressing wheel, the influence of plate warping on the measurement precision is eliminated, and the measurement precision is improved.

The invention relates to the technical field of tunnel settlement data acquisition and analysis, in particular to a tunnel settlement data acquisition method and system based on laser ranging, and the method comprises the following steps: S1, equipment is a monitoring device comprising a holder and two laser ranging sensors with a fixed included angle, the first sensor horizontally points to the side wall of a tunnel, and the second sensor horizontally points to the side wall of the tunnel; the second sensor points to the tunnel vault at an included angle theta; s2, point distribution and base point selection, wherein monitoring points are distributed in the tunnel according to a preset rule, and a zero reference point is arranged in a stable area of a tunnel portal; in the scheme, through integration of the double laser sensors and automatic holder scanning, high-density and high-precision automatic continuous data acquisition of the tunnel section is realized, and the defects of low efficiency and insufficient coverage of a traditional method are overcome; meanwhile, by means of intelligent coordinate transformation, a deformation calculation model and a multi-stage early warning mechanism, real-time calculation, trend prediction and graded automatic alarm of settlement and convergence parameters are achieved.

The invention is suitable for the field of safety net production, and provides a safety net warp knitting machine which comprises a warp knitting machine body, a body integrated controller, a tension detection unit, a needle bed execution unit, a knit defect monitoring unit and an execution driving unit. The core is that an intelligent tension dynamic adjusting module, a mesh specification parameterization adaptation module and a multi-mode knit defect early warning and self-repairing module are arranged in the controller; according to the invention, the intelligent tension dynamic adjustment module corrects control parameters in real time through a self-adaptive PID algorithm, and tension fluctuation is controlled within + / -0.5 N; the mesh specification parameterization adaptation module and a needle bed are subjected to closed-loop positioning through a pre-stored parameter library, and the specification switching time is smaller than or equal to 5 minutes; according to the multi-mode knit fault early warning and self-repairing module, through image + laser sensor multi-source fusion, the knit fault detection rate reaches 100%, and the slight knit fault self-repairing success rate is larger than or equal to 90%. The three-level module cooperates with hardware, safety net weaving precision, production flexibility and intelligent level are remarkably improved, and the system is suitable for efficient batch production of safety nets of multiple specifications.

The invention relates to the technical field of state monitoring of rail transit equipment, and discloses a rack rail train gear online detection system and method, and the system comprises a laser sensor array module; a visual perception assembly module; a trigger module; and a data processing module. The method comprises the following steps: synchronously acquiring vertical distance data and an image sequence; applying an optical flow algorithm to track an image sequence to calculate a gear rotation angle; installing errors and vehicle vibration are separated through cross-correlation and low-pass filtering, and distance data are corrected; reconstructing the full-circle geometric contour of the gear according to the rotation angle; and finally, geometric deviation and surface damage are judged based on contour and image analysis. According to the invention, through multi-modal data fusion and error decoupling, high-precision automatic on-line detection of the gear of the rack rail railway vehicle under the dynamic passing working condition of the vehicle is realized, and the problems that the traditional off-line dismounting detection efficiency is low and early damage cannot be found in time are solved.

The invention provides a manipulator AWC calibration method and system based on delay compensation, and belongs to the technical field of semiconductor manufacturing equipment automation. The method comprises the steps that when the operation speed of a manipulator is low, the position of a sensor in a robot basic coordinate system is calculated; when the operation speed of the manipulator is full speed, inversely solving the radius of the wafer according to the position of the sensor in the robot basic coordinate system and the position of the manipulator when the sensor is triggered; in the process of inversely solving the radius of the wafer, constructing a delay compensation model; and delay verification is conducted on the constructed delay compensation model, when the verification result is that calibration succeeds, the high-speed control mechanical arm stretches out of the station, and the delay compensation model is adopted for deviation correction. The problem that AWC calibration precision is reduced due to signal transmission delay under the high-speed working condition is solved, and laser sensor base coordinate calibration and wafer circle center positioning errors under high-speed movement are reduced.

The invention relates to the technical field of agricultural machinery, and provides an open field vegetable swing type intelligent inter-plant weeding device and a control method thereof, and the device comprises a plurality of weeding monomers, a sensor mechanism and a control mechanism. The sensor mechanism comprises depth cameras, laser sensors and absolute value encoders, the depth cameras are installed on the front portions of the multiple weeding single bodies, the visual field covers multiple rows of crops, and the laser sensors and the absolute value encoders are arranged on the weeding single bodies; the control mechanism is connected with the depth camera, the laser sensor and the absolute value encoder and used for processing data of the sensor mechanism, calculating the fusion height through a fusion algorithm and controlling and driving the lifting mechanism, the transverse moving mechanism and the weeding knife opening and closing mechanism to act based on the error between the fusion height and the target depth so as to achieve accurate weeding and seedling avoiding. The device can quickly avoid crops while effectively removing weeds between rows and plants, and finally realizes mechanical weed removal of open field vegetable crops which are large in bare soil proportion and easy to generate weeds.

The invention relates to the technical field of semiconductor polishing, in particular to a polishing carrier and a flyer detection method.The polishing carrier comprises a carrier body, the carrier body comprises a first base and a second base which are stacked, and the second base is used for bearing a to-be-polished piece; the detection part is arranged on the second seat and located on the outer side of the range covered by the first seat; the detection assembly comprises a laser sensor, and the detection assembly is arranged on the outer side of the carrier body, located above the detection part and used for monitoring the displacement change of the detection part in the direction perpendicular to the plane where the to-be-polished piece is located. The technical problem that the flyer condition cannot be accurately identified and timely coped in the polishing process is solved, and the technical effect of accurately identifying and timely coping the flyer condition is achieved.

The utility model discloses laser roller cleaning automatic centering equipment and laser roller cleaning equipment, and the laser roller cleaning automatic centering equipment comprises a first middle surface alignment mechanism which is used for carrying out preliminary positioning on the laser cleaning equipment; and the second middle surface alignment mechanism is used for automatically centering the laser cleaning equipment. The center of the device is aligned with the center of the roller through the first centering face and the second centering face, automatic centering is achieved, and it is guaranteed that the distance between the laser cleaning device and the roller face is within a set range. In addition, laser sensors are arranged on the first centering face and the second centering face, and whether equipment clamping is accurate or not is fed back.

The invention belongs to the technical field of automatic dense storage, and particularly relates to a goods allocation positioning method based on multi-sensor fusion, which comprises the following specific steps of: starting an equipment main power supply, and finishing initialized communication by a controller; line laser continuous scanning is carried out on a tray through a laser sensor, complete three-dimensional point cloud data are obtained, all contour features from a standard tray to a special-shaped and customized tray can be covered, the point cloud data are preprocessed, a contour fitting algorithm is called to extract edge features, the actual size of the tray is directly calculated, and the accuracy of the actual size of the tray is improved. Precise identification of trays of multiple sizes is realized, limitation of fixed threshold detection of a photoelectric sensor is broken through, an actually measured size is compared with a preset standard size, and even if the size of the tray exceeds a preset range, an actual contour of the tray can be determined through edge extraction of point cloud data. And misjudgment caused by exceeding the detection range of a single photoelectric sensor is avoided.

The invention relates to the technical field of automatic control, in particular to a vehicle docking and automatic leveling system for a loading site. Comprising a loading platform, a butt joint platform, a linear guide rail, a sliding carrying platform, a servo motor, a platform side two-dimensional linear scanning laser sensor, a four-corner hydraulic cylinder assembly, a cross balance valve assembly, a servo valve, a cylinder pressure sensor, a magnetostrictive displacement sensor and a controller. The linear guide rail is arranged on a top cross beam of the loading platform, the sliding carrying platform is arranged on the linear guide rail and is driven by the servo motor to reciprocate, the platform-side two-dimensional linear scanning laser sensor is fixed on the sliding carrying platform, and a laser emitting plane is perpendicular to the longitudinal axis of the loading platform; the four-corner hydraulic cylinder assembly is arranged at the bottom of the butt-joint platform and supports the butt-joint platform, and the cross balance valve assembly is communicated with rodless cavities of the two opposite-corner hydraulic cylinders. According to the invention, the space pose information of the opening at the rear end of the compartment can be stably obtained under the condition that the vehicle parking attitude has transverse deviation, pitching or transverse rolling.

The utility model discloses a vehicle-mounted contact rail detection device, belongs to the field of rail detection, and aims to reduce labor intensity and improve efficiency. Comprising a rail inspection beam, an acceleration sensor and a pressure sensor. The rail detection beam stretches across the vehicle bottom, and a laser 2D sensor, a camera and a data collector are integrated on the rail detection beam. The acceleration sensor is mounted at the bottom of the collector shoe carbon slide plate; the pressure sensor is installed between the current collector body and the collector shoe carbon slide plate. Detection equipment such as a laser 2D sensor, a camera and a data collector is integrated through the rail detection beam, the complexity of installing the detection equipment under a vehicle is simplified, and the purpose of dynamically detecting the contact rail is achieved. And the pressure sensor, the acceleration sensor and other equipment are mounted on the under-vehicle current collector, so that the detection of the rail detection beam can be corrected, and the detection precision can be improved. Workers do not need to frequently carry out squatting operation, the labor intensity is reduced, the detection efficiency is improved, the geometric state parameter change of the contact rail can be mastered in real time, and the digitization degree is improved.

A miniature air-bearing probe based on a patch motor drive belongs to the fields of high-precision measurement and electromechanical technology. The device comprises two air-bearing short sleeves fixed to a base, with an air-bearing guide rail installed between the base and the air-bearing short sleeves. A patch motor is mounted in the middle of the guide rail, and a pre-tensioned hinge is mounted on the outer side of the patch motor. The pre-tensioned hinge and the drive foot of the patch motor are in an interference fit. The air-bearing sleeves, motor housing, and mounting base are all mounted on the same reference plane of the base. Specifically, the air-bearing guide rail achieves frictionless linear motion in the probe's direction of movement. The patch motor drive enables low-speed, high-precision motion, and the combination of a laser sensor ensures the probe's high accuracy. Therefore, the device of this invention has no Abbe error in principle and has the advantages of low triggering force and high measurement accuracy.

The invention relates to the field of molten aluminum flow control, in particular to a molten aluminum flow control structure and method of a mixing furnace and the mixing furnace. The molten aluminum flow control structure of the mixing furnace comprises a launder, an adjusting mechanism, a control box and a laser sensor, and the laser sensor and the adjusting mechanism are arranged above the launder; the laser sensor is used for obtaining the detected liquid level height of molten aluminum in the launder and sending the detected liquid level height to the control box. The control box controls the adjusting mechanism according to the preset liquid level height and the detected liquid level height so as to adjust the liquid level height of the molten aluminum. The liquid level of the molten aluminum is monitored in real time in combination with the laser sensor, the adjusting mechanism is accurately adjusted to control the flow of the molten aluminum, a closed-loop control system is formed, automatic and accurate adjustment of the flow of the molten aluminum is achieved, and therefore the product quality is remarkably improved, and safety risks caused by manual operation are thoroughly eliminated.

A system and method for contamination measurement. The system includes a laser sensor for sensing contaminant on an object to generate an image, and a sensor interface and image processing module that receives an image of laser light that is sensed on the object. The sensor interface and image processing module processes the image using image characterization and image processing to provide contaminant determination. Contaminant determination may include estimating a degree of change in contaminant level from an initial condition or measuring exact amounts of contaminant collected.

The invention discloses a multi-channel positioning type synchronous and stable feeding device of a high-pressure PE bottle blowing machine. Comprising a feeding frame body, a chain plate conveying belt is arranged in the feeding frame body, a feeding conveying belt is installed at the front end of the chain plate conveying belt, a trapezoidal discharging hopper is installed below the rear end of the chain plate conveying belt, an inclined guide rail is arranged at the lower end of the trapezoidal discharging hopper, and a sorting channel is fixedly connected to the rear end of the inclined guide rail; a lower feeding table is fixedly connected to the lower end of the sorting channel, a sorting frame is fixedly connected to the front end of the top of the sorting channel, a first electric telescopic rod is installed at the front end of the sorting frame, and a U-shaped frame located at the lower end of the trapezoidal discharging hopper and the upper end of the inclined guide rail is installed at the front end of the first electric telescopic rod; and a front laser sensor is mounted at the front end of the inner side of the U-shaped frame. According to the device, the multi-channel flow dividing device is arranged, bottle blanks can be automatically divided and conveyed in different directions, the conveying efficiency is improved, and material blocking is avoided.

The invention relates to the field of state monitoring of wind generating sets, and provides an online fan blade unbalance detection method based on a laser sensing technology. Aiming at the problems that a traditional vibration analysis method is long in signal transmission path, prone to interference and the like, a laser sensor array is vertically arranged on the outer wall of a tower, and non-contact real-time measurement is achieved to solve the problems. The core method is based on relative deformation analysis between the blades, the relative deformation difference of every two blades at the same measuring point in the same measuring period is calculated, the average deformation and the maximum deformation index are constructed, and fault diagnosis is achieved by comparing the average deformation and the maximum deformation index with a preset threshold value. Through numerical calculation of all the sensors, short-term warning is given out if imbalance is judged; and setting a threshold value of n times of abnormity in continuous m rotation periods so as to distinguish the instantaneous interference from the real fault. The method is online, real-time and high in precision, has the advantages of being high in interference resistance, accurate in positioning, low in maintenance cost and the like, and guarantees safe and stable operation of the fan.

In order to solve the problems of the prior art, the truck safety detection system is provided, which comprises a carrier, a second scanning laser sensor, a cargo safety inspection system and a control system. After the target vehicle to be inspected enters the second scanning field of the second scanning laser sensor to form an effective trigger, the control system obtains the distance data of each scanning point of the surface of the target vehicle to be inspected relative to the second scanning laser sensor, connects the distance data to form a vehicle body data model, and analyzes the vehicle cab based on the vehicle body data model. The cargo safety inspection system is controlled to be opened or closed according to the analysis result of the vehicle cab. The application mainly forms a boundary data model of the target vehicle to be inspected based on the data point cloud of the scanning laser sensor to analyze and judge, has the advantages of high precision, high stability, strong anti-interference ability and high adaptability to vehicle types, and has low requirements for the deployment site.

The present application relates to the technical field of dishwashers, and provides a semi-automatic high-efficiency dishwasher. The semi-automatic high-efficiency dishwasher comprises a dishwasher assembly and a feeding / discharging assembly. The dishwasher assembly comprises a dishwasher main body, a first spray arm, a second spray arm, rollers, roll-up curtains, and a driving member. The dishwasher main body, the first spray arm, the second spray arm, the rollers, the roll-up curtains, and the driving member are provided. By means of the first spray arm and the second spray arm, the water spray amount can be increased, increasing the coverage of rinsing and improving the efficiency of rinsing. The roll-up curtains can effectively avoid water splashing. By providing support tables, support frames, a controller, and laser sensors, double-layer dish baskets can be simultaneously and conveniently picked up from and placed into the dishwasher main body; and when it is detected by means of the laser sensors that a basket has been placed, the driving member is controlled to drive the rollers to rotate, so as to roll up the roll-up curtains, and no manual startup control for rolling up the roll-up curtains needs to be performed any more, thereby improving efficiency, lowering cost, and improving safety.

The application discloses a kind of robot friction stir welding force-position hybrid control method, it is related to robot welding control technical field, comprising the following steps: step S10 establishes the hybrid strategy model based on constant displacement control and constant pressure control, the trajectory deviation caused by flexible deformation is compensated by robot dynamic offset function;The constant displacement control monitors welding depth in real time by laser sensor, the laser sensor is installed in 45° oblique direction to the outer wall of motorized spindle, and the collection point is located in the front side of the welding advancing direction, to avoid the interference of flash;The constant pressure control is collected axial upset force by six-dimensional force sensor, and force feedback type impedance control strategy is adopted.The robot friction stir welding force-position hybrid control method compensates the flexible deformation of robot by dynamic offset function, combined with the hybrid strategy of constant displacement and constant pressure control, solves the problem of uneven weld forming under single control mode.

This utility model discloses a nanoimprinting machine, including an imprinting template mounting stage and a substrate mounting base. Multiple sets of suction cups (secondary) for adsorbing and fixing the substrate are mounted on the upper center of the substrate mounting base. The imprinting template mounting stage is positioned above the substrate mounting base. Above the positions where the suction cups (secondary) are positioned to fix the substrate, multiple sets of suction cups (tertiary) for adsorbing and fixing the imprinting template are provided, with the adsorption ends of the suction cups (tertiary) forming the adsorption end face of the imprinting template. Each set of suction cups (tertiary) is connected to a suction cup mounting plate. The suction cup mounting plate is also connected to multiple sets of laser sensors for detecting the tilt of the adsorption end face of the imprinting template relative to the substrate surface. A suction cup fixing component is located at the upper end of the suction cup mounting plate, and multiple voice coil motors are located at the upper end of the suction cup fixing component for adjusting the tilt of the adsorption end face of the imprinting template. This utility model solves the leveling problem during the imprinting process, avoids damage to the template, substrate, and imprinting head, improves the performance of the nanoimprinting machine, and achieves better nanoimprinting results.

The present application relates to the technical field of stacking system, specifically to a multi-variety bending finished product flexible stacking system, comprising: a visual recognition module configured to scan the plate to be stacked by a 3D laser sensor, generate point cloud data and extract the following parameters: the size set of the flat plate, wherein L is the length, W is the width, and H is the thickness; the curvature distribution and the gravity center coordinates of the bending piece; a dynamic stacking type planning module connected to the visual recognition module and configured to: calculate the interlayer offset based on the pyramid stacking constraint, wherein H is the current height, and the safety inclination angle is ≤15°. The plate combination is calculated in real time based on the greedy backtracking algorithm, the space utilization rate is improved to 92% (the traditional system ≤75%), the small plate filling response time is ≤0.5 seconds through the temporary storage area scheduling mechanism, and the gap waste is reduced.

The utility model discloses a glass insulator and a laser sensor, the glass insulator comprises a glass main body and a pre-fixing assembly arranged between the glass main body and a metal base, the pre-fixing assembly comprises a protruding member arranged on the metal base or the glass main body, and a fixing member arranged on the protruding member, and the limiting surface is arranged on the glass main body or the metal base and is matched with the convex piece. The stability between the glass main body and the metal base is improved before sintering, so that the glass main body and the metal base can be kept relatively static in the sintering process, the gap between the glass main body and the metal base after sintering is reduced, the internal sealing performance of the laser sensor is improved, the service life is prolonged, operation is better performed during sintering, and the service life of the laser sensor is prolonged. And the sintered whole appearance is more attractive, the loss during sintering is reduced, and the yield is improved.

The invention relates to the field of road construction detection, and discloses a municipal engineering road base material thickness laser detection device which comprises a shell, a first protection assembly is arranged at the lower end of the interior of the shell, a second protection assembly is arranged on the periphery of the first protection assembly, and the second protection assembly is arranged at the lower end of the interior of the shell. A mounting frame is arranged at the upper end of the interior of the shell, a laser sensor is arranged at the lower end of the mounting frame, a support assembly is arranged at the upper end of the shell, and balancing mechanisms are rotationally arranged at the positions, located at the lower end of the support assembly, of the periphery of the shell. The road base material thickness laser detection device for municipal engineering provided by the invention has the functions of integrated active safety, modular drop resistance, self-cleaning and anti-interference stability, laser is blocked through a gravity sensing deflection physical layer, modular parts absorb energy and can be replaced at low cost during dropping, and pulse blowing and magnetic attraction locking are adopted, so that the detection efficiency is improved. And safety, precision and durability are ensured.