33 results about "Laser displacement meter" patented technology

The invention relates to the technical field of laser displacement meters, discloses a calibration method of a laser displacement meter for a Beidou device based on multi-data coupling, and effectively solves the problems of time delay compensation and data synchronization of cooperative work of multiple devices in a dynamic environment. According to the invention, when a carrier moves at a high speed or environmental parameters suddenly change, submillimeter-level positioning precision can still be maintained, meanwhile, data processing delay is controlled within a millisecond-level range, the reliability of a measurement system under a complex working condition is remarkably improved, and through double marking of a GNSS timestamp and a local clock, the measurement precision is greatly improved. And an accurate time deviation observation value is provided for a subsequent time delay compensation algorithm, so that a time-space unified data basis is established in a data preprocessing stage, and the feasibility of multi-source heterogeneous data fusion is remarkably improved.

The invention relates to a displacement and pneumatic pressure synchronous measurement method and system, an external trigger system triggers a multi-channel dynamic signal data acquisition system and a pressure scanning valve to synchronously start measurement, and the pressure scanning valve and a laser displacement meter can synchronously measure the pressure and displacement of all pressure measurement points; the pressure scanning valve and the single-channel piezoresistive differential pressure sensor can synchronously measure pressure information of a reference pressure measuring point, and the pressure information serves as accurate basic signal reference data. Time difference calculation is carried out on pressure signals of a reference pressure measuring point measured by the single-channel piezoresistive differential pressure transducer and the pressure scanning valve through a cross-correlation method and a manual alignment method, so that time sequence alignment is carried out on a displacement signal measured by the laser displacement meter and a pneumatic pressure signal measured by the pressure scanning valve. The time difference of the measured signals is calculated accurately, the signal time sequence consistency can be remarkably improved, the accuracy of a final result obtained through synchronous measurement is higher, and more reliable data support is provided for subsequent vibration analysis.

The invention provides a weld joint dynamic eddy current detection method and system based on reinforcement learning, the system comprises a sensing layer, a decision layer, an execution layer and an identification layer, the sensing layer is used for collecting detection data of a weld joint surface, and the sensing layer comprises an eddy current sensor, a laser displacement meter and a thermal infrared imager; the decision-making layer is connected with the sensing layer and is used for dynamically adjusting detection parameters based on a reinforcement learning algorithm; the execution layer is connected with the decision layer, is used for executing a detection action according to the adjusted detection parameters, and comprises a four-axis linkage eddy current sensor and a frequency converter; the identification layer is connected with the sensing layer and the decision-making layer, is used for identifying weld defects based on the eddy current signals, and comprises a multi-defect identification model; and the decision layer dynamically adjusts detection parameters of the execution layer through a reinforcement learning algorithm by taking the time-frequency characteristic of the eddy current signal, the lift-off gap and the environment temperature as a state space and taking the frequency adjustment amount and the lift-off gap control instruction as an action space, so that real-time detection of the apparent defects of the welding seam is realized.

A wind power foundation saturation container multi-dimensional loading device comprises a vertical moving part, a plane rotating part, a model box part and a saturation part, the vertical moving part is used for being connected with and driving the plane rotating part to move vertically, the plane rotating part is used for driving a loading tower to move horizontally, an adjustable supporting leg is arranged on the loading tower, and a winch motor is arranged on the adjustable supporting leg and connected with a winch. The model box part comprises a foundation material arranged in a model box body, tracer particles doped in the foundation material, a model structure arranged in the foundation material, an inclinometer and a loading ring arranged on the top surface of the model structure, a cable connected between the loading ring and the hook, a dynamometer arranged on the cable, and a laser displacement meter arranged on the inner wall of the model box body; the saturation part comprises a static sounding support arranged on the inner wall of the model box body, a clamp is arranged on the static sounding support, a liftable static sounding probe rod is arranged in the clamp, a water injection hole and a water drainage hole are formed in the side wall of the model box body, and a camera is erected right in front of the model box body.

The invention is suitable for the technical field of civil engineering, and relates to a displacement monitoring system and a data correction method in a surrounding rock temperature changing process, and the system comprises a fixed disc, a laser displacement meter, a connecting piece, a pedestal, a track, and a driving piece. The rail is connected with the driving piece, the base is installed on the rail, the base is provided with a connecting piece, the connecting piece is connected with the fixed disc, and the fixed disc is provided with a plurality of laser displacement meters used for collecting tunnel data. The tunnel structure deformation monitoring device is simple in structure, convenient to disassemble, flexible in positioning, capable of achieving real-time, long-term, accurate and stable tunnel structure deformation monitoring and high in feasibility, economical efficiency and generalization performance.

A protective device and method for a continuous wind tunnel flutter test model, belonging to the field of wind tunnel testing technology, addresses the problem that traditional physical methods cannot measure the deformation of special structural models during flutter tests. The device includes a reflector and a laser displacement meter matrix, which are respectively positioned opposite each other on the two sidewalls of the wind tunnel test section. One end of the test model is connected to one sidewall, and the free end of the test model extends horizontally towards the other sidewall. The amplitude at a specified position on the test model is calculated using the laser displacement meter matrix, and this is used as the criterion for the activation of the safety protection device. Once the calculated result exceeds the safe range, the safety protection device can be quickly activated to protect the test model and stop the wind tunnel test. This device and method overcome the shortcomings of using other types of sensors for safety threshold judgment in continuous transonic wind tunnel flutter tests, avoiding damage to the wind tunnel and test model during flutter tests.

The invention discloses a harmonic oscillator quality factor and nonuniformity rapid testing device. The harmonic oscillator quality factor and nonuniformity rapid testing device comprises a vacuum system, an excitation system, a harmonic oscillator, a clamping and transposition device, a laser vibration meter and a resolving module. The harmonic oscillator is excited to vibrate in a physical knocking mode; acquiring single-point displacement data of a harmonic oscillator test position by using a laser vibration meter; obtaining the inherent frequency and the frequency difference of the harmonic oscillator by adopting a frequency domain analysis method; after test data are segmented according to time, spectral analysis is carried out, the amplitude spectral density of displacement signals in different time periods is obtained, and the difference of the circumferential quality factor of the harmonic oscillator is obtained by using the amplitude spectral density change of two inherent frequency points; and finally, calculating to obtain two quality factors. According to the method, the purpose of accurately identifying the quality factor and the non-uniformity of the harmonic oscillator through single test is achieved, the method has the advantages of being high in test speed, low in requirement for the number of test devices, high in test precision, good in practicability and the like, and the test efficiency of the quality factor and the non-uniformity of the harmonic oscillator is greatly improved.

The utility model relates to the technical field of pile foundation engineering, and particularly discloses a physical model test device for testing the anti-pulling performance of a non-soil-squeezing precast pile foundation, which comprises a multifunctional cement grouting machine, a slurry storage pool, a vacuum pump, a water storage tank, a vacuum water pumping pipe, a model box bottom plate, a model box side plate and a high-strength toughened glass plate, and the output end of the multifunctional cement grouting machine is communicated with the outer surface of the slurry storage tank. According to the large-diameter non-soil-squeezing uplift pile construction device, an axial load is applied through an axial jack, loads of the upper portion and the lower portion of a model pile are collected through an upper pressure sensor and a lower tension sensor, pile body strain is collected through a pile body strain gauge, and a load displacement curve (Q-S curve) of a static load test of an uplift pile is obtained; the bearing capacity and the side friction resistance of the while-drilling pipe pile are obtained through calculation, the displacement of the uplift pile and the displacement of the soil layer can be obtained through the dial indicator and the laser displacement meter respectively, and therefore the contribution effects of different uplift measures on the uplift force are judged.

This invention provides a laser measurement method that can measure the outer circumference shape of a crankshaft counterweight over a wider area. [Solution] In the laser measurement method for the shape of a crankshaft counterweight, the crankshaft is rotated around the rotation axis O, and the laser beam L of a laser displacement meter is irradiated onto the counterweight 1 to measure the outer circumference shape of the counterweight 1. During this measurement, the laser beam L is irradiated with an offset relative to the rotation axis O so that the direction of irradiation of the laser beam L does not intersect with the rotation axis O.

The invention relates to the technical field of safety monitoring, and particularly discloses a dry coal shed safety monitoring system, which comprises a data acquisition module, a data transmission module, a data processing module, a data storage module, a data processing module, a data processing module and a data processing module, and is characterized in that stress sensors, laser displacement meters, settlement sensors and steel rope meters are arranged at key parts of a dry coal shed; data are transmitted to a master control server with a built-in finite element analysis and data processing module and a model building module through a collector, a finite element model is built according to design parameters, foundation displacement working conditions of + / -5 mm to + / -50 mm are simulated, the mapping relation between an upper structure and foundation displacement is fitted, the data processing module is used for correcting displacement data through the mapping relation, and the displacement data are obtained. And the early warning module is used for setting a multi-parameter threshold value, and triggering initial / middle / advanced early warning according to single abnormality, multi-parameter abnormality and continuous increase of the basic displacement. The system realizes real-time comprehensive monitoring, fills the blank of the prior art, and ensures the safety and stability of the dry coal shed.

The application relates to a slope monitoring and anchor cable support integrated device and a monitoring method of anchor cable support, wherein the slope monitoring and anchor cable support integrated device comprises an anchor cable support assembly, a monitoring assembly, a first sensing module, a second sensing module and a control assembly; the anchor cable support assembly is used for anchoring a slope and providing prestress; the monitoring assembly cooperates with a displacement sensor to monitor and determine whether the rock mass after anchoring changes, whether the applied prestress fails, a vibration sensor monitors the state of a single-point position and determines whether the device is in vibration or displacement, each laser displacement meter determines whether the relative position between adjacent devices has changed, the anchoring hole of the slope, the prestress and the whole slope are monitored, and finally real-time monitoring and data transmission are realized through the control assembly, so that the monitoring is more comprehensive and effective. The application effectively solves the problem that the existing slope support monitoring method monitors the slope as a whole, and the monitoring is not comprehensive.

The application provides a hot-pressing intelligent control regulation method and device based on FPC, and belongs to the technical field of FPC hot-pressing processing. The method synchronously collects the surface image and three-dimensional topographic point cloud data of the FPC substrate through a camera and a laser displacement meter, realizes real-time detection based on conditions, intelligently switches the feature extraction mode according to the interference detection result, adopts an edge detection algorithm when no interference occurs, starts a Bayesian Dropout network to perform multiple random sampling inferences when interference occurs, activates a digital twin to predict deformation characteristics if the coefficient of variation is greater than a preset threshold, calculates the hot-pressing parameter compensation amount according to the deformation characteristics and adds a tolerance weight, and continuously optimizes the control effect through closed-loop feedback. The application effectively solves the image feature extraction distortion problem caused by optical interference, and significantly improves the hot-pressing control precision and product yield.

The invention discloses a multi-barrier sealing performance test method for a high-voltage cable transition joint, and the method comprises the steps: constructing a multi-factor coupling test system, synchronously simulating thermal expansion, mechanical vibration and oil pressure fluctuation, and truly reproducing the complex operation condition of the transition joint. Three-stage test processes of single-factor baseline test, multi-factor coupling acceleration test and final state detection are progressive layer by layer, eight cycle coupling tests are equivalent to one-year working conditions on site, the test time is short, and the cost is relatively low. By means of professional sensors such as a laser displacement meter, an infrared thermal imager, an acoustic emission sensor and a high-precision mass flow meter, accurate parameter measurement is guaranteed, a quantitative scoring model is combined with weight distribution and grading criteria, multi-dimensional data is converted into a visual result, thermal expansion, vibration or oil pressure related sealing weak links can be accurately positioned, and the sealing performance of the system is improved. And an improvement direction or a decision basis can be clearly designed through a grading standard.

The application provides a three-dimensional high-speed vibration target clear image acquisition method, system and medium, the method comprising: collecting vibration target images based on a high-speed camera, preprocessing the vibration target images, and extracting target contours; analyzing target center points based on the target contours, measuring three-dimensional position information of the target center points at different time nodes based on a laser displacement meter; analyzing plane vibration information and depth vibration information of the target based on the three-dimensional position information of the target center points at different time nodes; fusing and processing the plane vibration information and the depth vibration information to generate three-dimensional vibration state information of the target; adjusting the viewing angle and focal length of the high-speed camera based on the three-dimensional vibration state information of the target to obtain a clear image of the target; and dynamically zooming and adjusting the angle of the high-speed camera to track high-speed vibration of a complex shape target at a high magnification and acquire a clear image.

The invention provides a three-dimensional surface roughness evaluation method, which comprises the following steps of: detecting displacement according to a certain interval in the X-axis direction by using a two-dimensional laser displacement meter to obtain displacement data, averaging the displacement data in the Y-axis direction in a measurement range to generate datum plane data of each coordinate; the surface roughness parameter is detected by subtracting the reference surface data from the displacement data of each X-Y plane coordinate, and the laser width of the reference distance of the two-dimensional laser displacement meter is set as 100% as the surface roughness parameter related to the roughness height. A range in which the surface roughness parameter converges to approximately 100% by changing the measurement width in the Y-axis direction is determined as an effective measurement width range, and displacement data is acquired by detecting displacement at a fixed interval in the X-axis direction with the measurement width in the Y-axis direction. The X-Y plane coordinate displacement data is averaged in the Y-axis direction in the measurement width within the effective measurement width range to generate reference plane data of each coordinate, and the reference plane data is subtracted from each X-Y plane coordinate displacement data to generate three-dimensional surface roughness data.

The application discloses a kind of reinforced embankment reinforcement material deformation characteristics supergravity test method based on PIV technology, the test device of this method includes: with observation window's supergravity model box, industrial camera and image processing system;Reinforced embankment model is set in supergravity model box, supergravity model box and industrial camera are placed in supergravity geotechnical centrifuge, the lens of industrial camera is aimed at reinforced embankment model through the observation window on supergravity model box, and the side of the observation window of reinforced embankment model is provided with mark point.Under the supergravity field provided by centrifuge, industrial camera carries out photographing to the deformation process of reinforced embankment model, and the displacement of mark point in image is analyzed through image processing system, i.e.the deformation of reinforced material can be obtained, and compared with the measurement parameters of laser displacement gauge above reinforced embankment model and the scale ruler pasted around observation window, and then the deformation characteristics of reinforced material and the overall deformation field of reinforced embankment model are obtained.

The invention relates to the technical field of hydraulic engineering, and particularly discloses a reservoir dam foundation rock mass in-situ shear and crack three-dimensional dynamic monitoring device which comprises a normal shear composite loading system, a three-dimensional laminated acoustic emission acquisition system, a multi-directional displacement synchronous monitoring system and an analysis terminal, specifically, the normal shear composite loading system comprises a supporting base, a first hydraulic cylinder, a second hydraulic cylinder and a wedge-shaped force transmission module; the three-dimensional laminated acoustic emission acquisition system comprises a sensor array, a signal transmission module and a data processing unit; the multidirectional displacement synchronous monitoring system comprises a laser displacement meter and a dial indicator. The invention further discloses a reservoir dam foundation rock mass in-situ shear and crack three-dimensional dynamic monitoring method. According to the reservoir dam foundation rock mass in-situ shearing and crack three-dimensional dynamic monitoring device and method, the problems that a loading system is insufficient in dynamic coupling, the three-dimensional crack signal capturing capacity is limited, and the positioning precision is low can be solved.

The invention belongs to the technical field of 3D printing, and particularly relates to a high-precision large-breadth stereo projection 3D printing system and a printing method thereof. The system comprises a DLP light machine with a light source, a projection lens and a resin tank. A light path projected by a DLP light machine in the system is reflected by a film spectroscope, enters a projection lens and is projected to an interface of a film and resin in a resin tank, a laser displacement meter is arranged on one side of the projection lens, an image controller is arranged on one side of the film spectroscope, a monitoring light path of the image controller coincides with a projection light path, and a sample table is located in the resin tank provided with the film. And the movement control system controls the movement of related parts. The printing method comprises the following steps: establishing a three-dimensional geometric model on a computer, cutting the three-dimensional geometric model into two-dimensional pictures, sequentially projecting the two-dimensional pictures to a thin film and resin interface for exposure and curing, descending a sample table layer by layer to complete model copying, and adopting a splicing printing mode when the size is out of range. According to the invention, high-precision and large-breadth machining capability is provided, and an advanced and accurate cutting-in means is provided for the field of micromachining.

The utility model relates to the technical field of excitation measurement, in particular to a micro displacement simulation measurement device, which comprises a first base, a vibrating plate, a target pasting plate, a vibration exciter, a second base, a support rod and a displacement acquisition mechanism, the vibration plate is arranged on the first base, the target pasting plate is arranged on the vibration plate, and the vibration exciter is adjustably arranged in the height direction of the vibration plate; the supporting rod is arranged on the second base; the displacement acquisition mechanism comprises a laser displacement meter, a measurement target and an installation fixing block; the laser displacement meter is arranged on the supporting rod through the installation fixing block, the measuring target is arranged on the target pasting plate, and the laser displacement meter is used for being matched with the measuring target to detect the tiny displacement of the vibration plate. According to the utility model, through cooperation of the vibration plate and the vibration exciter, infinitesimal displacement motion smaller than 0.5 mm and reciprocating motion frequency of 5-100 Hz can be provided, and the laser displacement meter in the embodiment can accurately measure the vibration plate.

A system and method for measuring a resistance (R)-magnetic field (H) curve of a magnetoresistive random-access memory (MRAM) device is described. The system includes a calibration fixture adapted to provide initial measured magnetic field data for setting a measured distance and a coil current of a coil of an electromagnet for a plurality of magnetic field strengths at a plurality of predetermined distances from an end surface of the electromagnet; a power supply adapted to provide a coil current to the electromagnet; and a laser displacement meter adapted to measure a distance from the end surface of the electromagnet to a device under test (DUT). The electromagnet is adapted to generate magnetic fields at a predetermined magnetic field sweep interval within a magnetic field sweep range from a value of a first magnetic field strength to a value of a second magnetic field strength.

The utility model discloses a super-gravity test device for the deformation characteristic of a reinforcement material of a reinforced embankment. The super-gravity test device comprises a super-gravity model box, a reinforced embankment model and an industrial camera, the reinforced embankment model is arranged in the supergravity model box, the supergravity model box and the industrial camera are arranged in the supergravity geotechnical centrifuge, a lens of the industrial camera is aligned to the reinforced embankment model through an observation window on the supergravity model box, and an identification point is arranged on one side of the observation window of the reinforced embankment model. Under the high gravity field provided by the centrifugal machine, the industrial camera photographs the deformation process of the reinforced embankment model, and the displacement amount of the identification point in the image is analyzed through the image processing system, so that the deformation amount of the reinforced material can be obtained. And the parameters are compared with measurement parameters of a laser displacement meter above the reinforced embankment model and graduated scales pasted on the periphery of an observation window, so that the deformation characteristics of the reinforced material and the overall deformation field of the reinforced embankment model are obtained.

This invention discloses a binocular vision-based 3D reconstruction method based on temporal consistency constraints, belonging to the interdisciplinary fields of computer vision and precision measurement. The method acquires intrinsic and extrinsic parameters through binocular camera arrangement and Zhang's calibration method to eliminate lens distortion; it simultaneously acquires dynamic video and performs grayscale normalization and background suppression. Sub-pixel-level depth recovery employs a gradient difference cost function, initial phase difference estimation, and parabolic fitting to improve pixel accuracy; it improves semi-global matching by fusing grayscale and gradient differences, combining 8-direction cost aggregation and multi-scale guided filtering to enhance accuracy in weakly textured regions. Temporal consistency constraints suppress jumps through disparity difference detection, Kalman filtering, and median filtering to ensure the continuity of the 3D trajectory. Finally, a dynamic point cloud is generated, which, verified by a laser displacement meter, shows reduced displacement and dominant frequency errors, making it suitable for vibration structure health monitoring and dynamic deformation analysis.

The invention discloses a binocular vision three-dimensional reconstruction method based on time sequence consistency constraint, and relates to the technical field of crossing of computer vision and precision measurement. According to the method, internal and external parameters are obtained through binocular camera arrangement and a Zhang's calibration method, and lens distortion is eliminated; and synchronously acquiring a dynamic video and executing gray normalization and background suppression. The sub-pixel-level depth recovery adopts a gradient difference cost function, phase difference initial estimation and parabola fitting, so that the pixel precision is improved; semi-global matching is improved, gray difference and gradient difference are fused, 8-direction cost aggregation and multi-scale guide filtering are combined, and the precision of a weak texture area is improved. The time sequence consistency constraint suppresses jump through parallax difference detection, Kalman filtering and median filtering, and guarantees the continuity of a three-dimensional trajectory. Through verification of the laser displacement meter, displacement errors and dominant frequency errors are reduced, and the method is suitable for vibration structure health monitoring and dynamic deformation analysis.

The present application relates to reinforced concrete pipeline testing technical field, especially in kind, a kind of testing system and testing method suitable for reinforced concrete pipeline, comprising: pedestal, for carrying reinforced concrete pipeline;Loading device, for the reinforced concrete pipeline is applied load;And, in the inner cavity of the reinforced concrete pipeline, two groups of laser displacement meters are arranged in parallel, for detecting the vertical direction displacement of the reinforced concrete pipeline when load is applied;And, at the end of the reinforced concrete pipeline, two pull rope type displacement meters are symmetrically arranged, for detecting the horizontal direction displacement of the reinforced concrete pipeline when load is applied.The present application can effectively eliminate the influence of the deformation of displacement meter support, so that the deformation of reinforced concrete pipeline is more real, the reinforced concrete pipeline test is more accurate, the scientificity of reinforced concrete pipeline mechanical loading test can be improved, the test result is enriched, and the measurement method is standardized.

The invention provides a hot-pressing intelligent control regulation and control method and device based on an FPC, and belongs to the technical field of FPC hot-pressing processing. According to the method, a camera and a laser displacement meter are used for synchronously acquiring surface images and three-dimensional morphology point cloud data of an FPC substrate, and real-time detection of optical interference is realized based on conditions; a feature extraction mode is intelligently switched according to an interference detection result, an edge detection algorithm is adopted when interference does not occur, a Bayesian Dropout network is started to perform multiple random sampling reasoning when interference occurs, and if a variation coefficient is greater than a preset threshold value, digital twin prediction deformation features are activated; and according to the deformation characteristics, the hot-pressing parameter compensation amount is calculated, the tolerance weight is added, and the control effect is continuously optimized through closed-loop feedback. According to the method, the problem of image feature extraction distortion caused by optical interference is effectively solved, and the hot pressing control precision and the product yield are remarkably improved.

Disclosed are a substrate including a metal clad laminate including a metal foil and a cured product of a prepreg, and an insulating layer laminated on at least one surface of the metal clad laminate, in which the metal clad laminate has 400 μm or more of an average thickness T1 measured by a predetermined method using a laser displacement gauge, and 10 μm or less of an absolute value D1 of a difference between a maximum value and a minimum value of a thickness, and a printed wiring board and a semiconductor package using the substrate.

This invention discloses a slope model moisture migration testing device under freeze-thaw cycles, comprising: a model box containing a soil-rock slope model, with the bottom of the model connected to an automatic water replenishment device. The automatic water replenishment device includes a sample water replenishment tank, a pressure balance pipe, and a Mariotte bottle. A fluorescent tracer is added to the sample water replenishment tank to allow for direct observation of the moisture migration process within the slope. The freeze-thaw cycle system of this device includes an upper cold bath plate, a cold bath device, a lower ambient temperature plate, an ambient temperature water pump, and connecting pipelines to simulate the freeze-thaw cycle of a slope caused by actual atmospheric environmental changes. The device includes a laser displacement meter, a temperature sensor, a data acquisition instrument, a computer, an ultraviolet lamp, and a digital camera to collect data on physical quantities such as displacement and temperature during the deformation process of the slope model, providing a quantitative analysis basis for the required research. By simulating the temperature rise and fall effects of the atmospheric environment on the slope model through the freeze-thaw cycle system, the deformation and internal moisture migration process of the slope model under freeze-thaw cycles are observed. This provides a basis for the mechanism research and prediction and early warning of geological disasters on slopes in cold regions.

The application discloses a kind of soil centrifuge simulation marine environment pile multi-direction loading test device and method thereof, belong to civil centrifuge test technical field, the device includes: model box, square frame, sliding mechanism, at least one aluminum pipe mounting section, rotary transmission mechanism, backing plate, thrust loading mechanism, load sensor, linear variable differential transformer, multiple miniature pore pressure sensor, at least one multi-position laser displacement meter;The method is applied to the above-mentioned one kind of soil centrifuge simulation marine environment pile multi-direction loading test device;Not only can the displacement accumulation of fan foundation in the whole life cycle under the action of multi-direction, cyclic loading under multi-direction loading, stiffness variation law, but also can study the evolution law of different seabed soil settlement, consolidation and other physical and mechanical properties, and is evaluated and analyzed through multi-angle.

The utility model relates to a steel structure bending test, in particular to a steel structure beam bending detection system, which comprises a bottom plate, a vertical plate vertically connected to one side of the top surface of the bottom plate, a transverse sliding rail transversely and fixedly connected to the bottom plate, a transverse sliding block in sliding fit with the transverse sliding rail, and a moving plate vertically connected to the transverse sliding block upwards and parallel to the vertical plate. Supporting plates which are parallel to the bottom plate and support the cross beam are arranged on the opposite faces of the moving plate and the vertical plate, a sliding way is transversely and fixedly arranged above the bottom plate, a moving block is in sliding fit with the sliding way, the moving block is driven by driving equipment to transversely move, and a laser displacement meter is fixedly arranged on the moving block. The axis of the cross beam is located over the movement track line where the laser displacement meter is located. By using the device, the bending degree of the cross beam can be measured by using a laser displacement meter, and meanwhile, the device can adapt to cross beams with different widths and different lengths during measurement, so that the application range of the device can be expanded.

The utility model relates to a net rack shed structure deformation monitoring system, and the system comprises a plurality of laser displacement modules which are respectively arranged on structure nodes in a net rack shed structure and are used for collecting the displacement data of the net rack shed structure, and each laser displacement module comprises a laser displacement meter and a laser reflection plate which is used in cooperation with the laser displacement meter, a laser emission group is arranged in the laser displacement meter and is used for emitting laser beams with different wavelengths and powers; and the data processing terminal is in communication connection with the laser displacement module and is used for receiving the displacement data acquired by the laser displacement module so as to carry out deformation monitoring according to the displacement data. According to the invention, the problem of low accuracy of the network frame shed structure deformation detection method is solved, the plurality of laser displacement modules are arranged to measure the deformation conditions of different positions of the network frame shed structure so as to improve the monitoring accuracy, and in addition, the laser beams with different wavelengths and powers are emitted through the laser emission group so as to improve the monitoring accuracy. Therefore, high-precision displacement measurement can be realized in a high-dust and high-coal-pile blocking environment.