1206 results about "Strain gauge" patented technology

The invention discloses a face gear planetary transmission system dynamic uniform load test platform and test method, and belongs to the field of gear transmission, and the test platform comprises a rack, a drive motor, a step-up gear box, a face gear planetary transmission system, a magnetic powder brake, a torque sensor, a slip ring, a stress strain test system and the like. The face gear planetary transmission system comprises an input face gear, a planet wheel, a planet carrier, a fixed face gear and the like. According to the dynamic uniform load test, stress values at the tooth root of the face gear and the tooth root of the planetary gear are measured mainly through strain gauges, and the corresponding relation between the tooth root stress and the meshing force at the gear meshing point is obtained through finite element simulation. And calculating the dynamic uniform load coefficient according to the dynamic meshing force root-mean-square values and the average values obtained at the tooth roots of the face gear and the planetary gear. By testing and analyzing the dynamic uniform load coefficient, the load distribution characteristic of the face gear planetary transmission system can be accurately revealed, a scientific basis is provided for structural parameter optimization, meshing performance improvement and reliability design of the face gear planetary transmission system, and then accurate and high-performance design of the transmission system is achieved.

The invention relates to the technical field of coal mine safety monitoring, and discloses a coal mine tunnel laser radar three-dimensional dynamic monitoring method. Aiming at the problems that in the prior art, data of a laser radar is easy to interrupt or unreliable under a severe working condition, and monitoring continuity is poor due to insufficient multi-source data fusion, the method is characterized in that laser radar surface data and optical strain gauge point data are synchronously acquired; constructing a roadway digital twinborn model; carrying out fusion and assimilation on the multi-source data by utilizing a Transform mechanism to obtain initial roadway deformation data; judging the credibility of the laser radar data based on Bayesian estimation; when the data are missing or uncredible, deducing full-field deformation by utilizing a gating mechanism in combination with optical strain gauge point data and a digital twin model; and finally, generating and outputting a three-dimensional dynamic deformation field. The system is mainly used for real-time, continuous and high-reliability deformation monitoring and safety early warning of the coal mine tunnel.

The utility model provides a double-rigid-gear harmonic speed reducer with a torque sensing function, which relates to the technical field of speed reducers and comprises a wave generator, a flexible bearing, a flexible gear, an output end rigid gear, a crossed roller bearing and a fixed end rigid gear. The crossed roller is arranged between the bearing outer ring and the output end rigid wheel, the output end rigid wheel serves as an inner ring of the crossed roller bearing, and the fixed end rigid wheel is detachably and fixedly connected with the bearing outer ring; the two end faces of the fixed end rigid wheel are each provided with a receding groove coaxial with the fixed end rigid wheel, a connecting wall is formed between the bottoms of the two receding grooves, and a plurality of strain gauges arranged in a circumferential array mode are installed at the position, close to one side of the output end rigid wheel, of the bottom of the receding groove. The elastic strain gauge is embedded in the rigid fixed end rigid wheel, so that the fixed end rigid wheel has a torque sensing function, the axial thickness of the harmonic speed reducer is not increased, and the use requirements of more occasions are met.

The invention relates to the field of tension and pressure sensors, in particular to a tension and pressure sensor with a compensation function, which comprises an elastic body, a strain gauge, a compensation gauge and a wiring terminal, the strain gauge and the compensation gauge are respectively arranged on the surface of the elastic body, the strain gauge, the compensation gauge and the wiring terminal are electrically connected through a plurality of high-temperature-resistant cables to form a bridge circuit, at least the strain gauge and the compensation gauge are respectively limited in the first heat insulation layer and the protection layer, and the first heat insulation layer is located between the elastic body and the protection layer. At least a first heat insulation layer used for protection, heat insulation, pressure resistance and sealing is used for wrapping a strain gauge and a compensating gauge which are packaged by a polyimide film and can resist the high temperature of 260 DEG C, so that the actual temperature of the strain gauge and the compensating gauge has a remarkable temperature difference with the current environment temperature; the actual temperature of the strain gauge and the compensating gauge is obviously lower than the environment temperature, so that the strain gauge and the compensating gauge are respectively in an ideal temperature range, and the force measurement precision of the pull pressure sensor is ensured.

The invention provides a scroll compressor cross ring dynamic strain wireless measuring device, which relates to the technical field of compressor state monitoring and comprises a high-temperature-resistant strain gauge, a wire fixing system and a wireless sensor. Wherein the high-temperature-resistant strain gauges are respectively attached to stress sensitive areas of a static key, a ring beam and a movable key of the cross ring every time; the wire fixing system comprises a three-stage fixing structure formed by an adhesive, an internal wire, an external wire and an internal binding post; the three stages of fixing structures are a strain gauge end fixing structure, a lead transition section fixing structure and a binding post end fixing structure in sequence; the high-temperature-resistant strain gauge is connected with the wireless sensor through an internal wire, a binding post and an external wire, and continuous signal collection is achieved. By implementing operation according to the technical route, the impact load borne by the cross ring at the moment of starting and stopping of the compressor can be collected in a high-quality mode, data collection in a closed cavity is achieved, and an experimental basis is provided for subsequent strength design of the cross ring.

A surrounding rock deformation and failure test system with a rotatable stress main shaft in a three-dimensional crustal stress field is characterized in that a press machine upper pressure head and a press machine base are oppositely distributed up and down, and a loading hydraulic cylinder is connected with the press machine upper pressure head; the surrounding rock sample is vertically arranged in the axial loading space, and a simulation roadway is formed in the axis part of the surrounding rock sample; annular upper and lower end plates are fixedly connected in the upper and lower ends of the confining pressure cylinder respectively; the confining pressure cylinder sleeves the outer side of the axial loading space; a plurality of groups of mounting holes are uniformly formed in the circumferential directions of the annular upper and lower end plates; the radial pressurizing assembly comprises a supporting steel pipe and an elastic capsule. The main supporting section is sleeved with the elastic capsule, and a plurality of through holes are formed in the main supporting section. A plurality of strain bricks are pre-buried in the surrounding rock sample; the track is fixedly mounted in the simulated roadway; the micro camera is assembled on the track through the electric control trolley; and the strain gauge II and the acoustic emission probe are arranged in the simulated roadway. According to the system, the working condition that the direction of a stress field changes can be simulated in a three-dimensional true triaxial stress environment.

The invention relates to the technical field of sensors, and provides a six-dimensional force and torque force sensor and a preparation method thereof.The six-dimensional force sensor is of a disc-shaped structure and comprises an outer supporting ring, an inner mass block and eight elastic beams connected between the outer supporting ring and the inner mass block; wherein the eight elastic beams comprise a first elastic beam and a second elastic beam which are alternately arranged around the inner mass block, the first elastic beam is a straight beam, the second elastic beam is a special-shaped beam, and a strain gauge preset on the main surface of each elastic beam responds to the strain of the elastic beam to generate a measurement signal; and the force and / or the torque applied to the inner mass block or the outer support ring can be determined according to the measurement signal. Due to the fact that the different elastic beams are different in shape and structure, the strain gauges are preset on the elastic beams of different types and positions, and the bridging mode is set, the output of each Wheatstone bridge is only sensitive to the force or the moment of force in the changed direction and is not sensitive to the force or the moment of force applied in other directions, and the decoupling capacity of the sensor structure is improved to the maximum degree.

The invention discloses a twelve-beam six-dimensional force sensor, and relates to the technical field of force sensing. The sensor effectively solves the problem of coupling interference in six-dimensional force measurement by optimizing the structural design of the elastic body, innovating the bridging mode of the strain gauges and accurately positioning the patches, and improves the measurement precision and stability. The sensor is of a twelve-beam elastomer structure, stress distribution under different loads is analyzed through COMSOL finite element simulation software, and the position of a strain sensitive area is determined; a group bridge circuit is designed through tension and compression strain characteristics of the symmetrical strain beams, and decoupling is achieved from the hardware level; mEMS silicon strain gauges are selected and accurately assembled, so that the measurement error is further reduced. Experimental data show that the crosstalk rate of the sensor under loads of all dimensions is as low as 2%, net output signals are stable, and the sensor can be widely applied to the fields of robots, precision manufacturing, aerospace and the like with high requirements on force measurement precision.

Systems, devices, and methods are provided for pulsed strain gauge topologies. A weight sensor assembly may comprise one or more load cells for receiving excitation pulses during a first state period of a duty cycle, sample and hold (S / H) circuitry connected to the one or more load cells that holds analog measurement signals from the one or more load cells, first filtering circuitry connected to the S / H circuitry for processing the analog measurement signals and producing a DC level signal, an amplification system connected to the filtering circuitry, for amplifying the DC level signal, second filtering circuitry connected to the amplification system for filtering power line noise, and analog-to-digital (ADC) circuitry connected to the second filtering circuitry. Examples of load cells described herein include full-bride load cells (FBLCs) and half-bridge load cells (HBLCs).

The invention provides an underwater vehicle measuring point layout optimization method and system, and belongs to the technical field of experimental measuring point layout optimization. Comprising the following steps: obtaining simulation data of an underwater vehicle structure through finite element simulation, and extracting strain data of a unit capable of arranging a strain gauge area according to actual engineering constraints; centroid coordinates of the units, sensitivity values of strain response values relative to working conditions and strain gradients are calculated by taking centroids of the units in the areas where the strain gauges can be arranged as nodes; mapping the strain response values of all the nodes to a unified interval to obtain a normalized strain response value; obtaining sensitivity coverage and strain gradient coverage, and calculating space coverage of all nodes; integrating the normalized strain response value, sensitivity coverage, strain gradient coverage and space coverage as optimization indexes, and performing optimization by adopting an improved discrete artificial bee colony algorithm; and a final layout scheme is decided by outputting the relationship between the number of the measuring points and the information amount.

The invention discloses a micropositioner hysteresis compensation driving control system and method based on strain gauges, and relates to the technical field of micro positioning control. The system comprises a micropositioner mechanical module, a displacement detection feedback module, a control module and a power amplifier module. In the mechanical module, a piezoelectric ceramic stack drives a moving table, and a first flexible hinge group and a second flexible hinge group are respectively used for guiding and transmitting driving force and are symmetrically arranged; the displacement detection feedback module outputs a voltage signal through a strain gauge adhered to the first flexible hinge and a Wheatstone bridge; the control module reversely deduces actual displacement according to a voltage signal and a strain-displacement linear relation, and a control signal is generated by comparing an instruction; and the power amplifier module converts the signal into a driving voltage to adjust the piezoelectric ceramic stack, so that closed-loop control is realized to suppress a hysteresis error. According to the invention, system integration is realized, cost and operation difficulty are reduced, and positioning precision and reliability are improved.

The utility model provides a harmonic wave speed reduction transmission device carrying a strain gauge, which comprises a motor, a harmonic wave speed reducer and a rigid gear which are arranged in a device shell, the motor drives the harmonic wave speed reducer to output speed reduction rotation kinetic energy, and the rigid gear is used for guiding and holding the harmonic wave speed reducer. The rigid gear is provided with at least one truss which can generate deformation of bending moment and is used for fixing the rigid gear in the shell, and the strain gauge is attached to the truss and is used for sensing the torsion of the speed reduction rotation kinetic energy output by the harmonic reducer, so that the structural configuration is refined.

The invention discloses a true triaxial hydraulic fracturing multi-scale monitoring system fusing acoustic emission, ultrasonic wave and strain linkage, and relates to the technical field of true triaxial hydraulic fracturing, which comprises a device main body, a horizontal stress loading system, a hydraulic servo pump pressure module, an acoustic emission monitoring system, a crack strain monitoring system and an ultrasonic monitoring system, according to the true triaxial hydrofracture multi-scale monitoring system integrating acoustic emission, ultrasonic wave and strain linkage, the hydrofracture process is comprehensively monitored through the acoustic emission monitoring module, the ultrasonic wave monitoring module and the strain gauge array monitoring module in an experiment, and the three monitoring means are matched with one another; and a data support with high temporal-spatial resolution is provided for the whole crack evolution process.

A pressure sensor and a pressure interface are disclosed. The pressure sensor comprises: a pressure interface, wherein the pressure interface comprises a cylindrical ceramic base and a ceramic diaphragm arranged at one end part of the ceramic base; the ceramic diaphragm is connected with the ceramic base, the strain gauge is connected with the ceramic diaphragm, and the ceramic base and the ceramic diaphragm are integrally manufactured. As the pressure sensor adopts the ceramic base and the ceramic diaphragm which are integrated, additional assembly and sealing are not needed, the risk of leakage is avoided, and the cost is low at the same time. Moreover, the pressure sensor is made of a ceramic material which is in contact with the pressure medium, so that the pressure sensor can be applied to corrosive pressure media and the like.

A strain gauge includes a flexible substrate, a resistor, and electrodes. Each electrode includes first patterns juxtaposed at predetermined intervals and electrically connected to each other. Second patterns of which longitudinal directions are toward a same direction as a longitudinal direction of each of the first patterns are disposed between opposing electrodes. The second patterns are electrically floating dummy patterns. The second patterns of which the longitudinal directions are toward a same direction as the longitudinal direction of each first pattern are disposed, the second patterns being interposed between first patterns opposite each other that are among given first patterns that constitute one of the electrodes and given first patterns that constitute another electrode. The plurality of second patterns are interposed between first patterns opposite each other that are among given first patterns that constitute one of the electrodes and given first patterns that constitute another electrode.

The invention belongs to the technical field of bridge engineering, and particularly relates to an analysis method for intelligently sensing a hanging basket of a corrugated steel web box girder bridge, a terminal and a storage medium, and the method comprises the steps: obtaining deformation data of a plurality of measurement points installed on the hanging basket of the corrugated steel web box girder bridge in an actual asynchronous method construction process; establishing an initial finite element model based on the geometric information of the hanging basket structure, and setting an elastic constraint condition at each support position of the initial finite element model; according to the invention, the static level gauge, the inclinometer and the strain gauge are arranged at the key positions of the hanging basket to construct a multi-source sensing monitoring network, so that the cooperative sensing of the vertical displacement, the inclination attitude and the structural strain is realized, and the comprehensiveness and accuracy of the state sensing in the construction process are effectively improved. Secondly, a vertical spring unit is introduced into the finite element model to serve as elastic constraint, the vertical compression deformation behavior of the corrugated steel web under the load effect is truly simulated, and the physical authenticity of boundary conditions is remarkably improved.

The utility model discloses a flush valve which comprises a valve body and a pressure sensing assembly, a pressure sensing channel is arranged on one side of the valve body, the pressure sensing assembly comprises a piston rod and a force sensing assembly, the force sensing assembly comprises a force sensing element, the force sensing element is a strain gauge or a flexible pressure film, and the piston rod is arranged in the pressure sensing channel. Water pressure in the pressure sensing channel can push the piston rod to act on the force sensing assembly so as to trigger the force sensing element. Water enters the pressure sensing channel and pushes the piston rod, and the piston rod acts on the force sensing component, so that the force sensing component is strained to cause corresponding electric signal change, and the current water pressure is reflected. The measuring precision of the force-sensitive element is extremely high, and the fine change of the water pressure in the pipeline can be accurately controlled by measuring the water pressure change through the force-sensitive element, so that more accurate regulation and control are realized.

The invention discloses a full-plane six-dimensional force sensor based on a thin film sputtering technology. The full-plane six-dimensional force sensor is used for synchronously measuring three-dimensional orthogonal force and torque. The sensor comprises a force transmission table, an elastic body, a base, a strain gauge and the like, wherein the elastic body adopts a composite structure of an inner-layer cross beam and an outer-layer honeycomb-like parallel beam. The innovation lies in that all strain sensitive areas of the elastomer are flat planes with upper and lower surfaces to form a full-plane design, so that the requirement of a thin film sputtering process on the flatness of a substrate is met. 24 strain gauges are sputtered on an upper plane and a lower plane to form 6 groups of Wheatstone bridges, so that six-dimensional force signal detection is realized. According to the full-plane structure, the problem that a strain gauge in a traditional sensor needs to be pasted on a narrow side face or edge is avoided, full-automatic surface mounting can be achieved, the long-term stability, temperature adaptability and measurement consistency of the sensor are remarkably improved, and the sensor is suitable for high-precision force measurement in the fields of industrial robots, aerospace and the like.

The invention relates to the technical field of electric connector weak light assembly vibration compensation alignment methods, particularly discloses an electric connector weak light assembly vibration compensation alignment method, and aims to solve the problems of low electric connector assembly positioning precision and high pseudo soldering rate caused by vibration in a weak light environment. The method comprises the following steps: monitoring the thermal radiation change of a vibration source in real time through an infrared thermal imaging sensor, and pre-judging a vibration acceleration vector in combination with a lightweight long-short-term memory neural network; synchronously triggering dual polarization angle imaging to respectively capture a housing reference mark and an enhanced terminal metal feature; the vibration data and the polarization image flow are fused in the field programmable gate array, a self-adaptive optical flow algorithm is adopted to resolve the displacement compensation amount, and a piezoelectric ceramic actuator is driven to carry out submicron order reverse displacement compensation; when the compensation amount exceeds a threshold value, a low-delay correction instruction is sent to the robot through an Ethernet control automation technology bus, and the steady-state error is ensured to be smaller than 0.3 micrometer by combining a strain gauge fine tuning feedback loop. According to the technical scheme, the assembling precision, efficiency and production line adaptability are remarkably improved.

The invention relates to the field of semiconductor packaging stress testing, and discloses a mounting method for a micro-size packaging type strain gauge, which comprises the following steps of: placing a sample to be tested in a bearing clamp, fixing the sample to be tested, then loading the sample to be tested into a bearing base of high-precision inverted mounting equipment, fixing the bearing clamp, and starting vacuum adsorption; putting a strain gauge adhesive into an adhesive dipping disc and scraping the adhesive; the customized suction head sucks the strain gauges and moves the strain gauges to the position above the glue dipping disc to be dipped in the bonding glue; the strain gauge pattern coincides with the to-be-pasted position of the product, and the customized suction head pastes the strain gauge to the to-be-detected position of the product; the customized suction head exerts pressure downwards as a whole, and the strain gauge is further flattened in a hot pressing mode; and putting the processed sample to be detected together with the strain gauge into an air pressure drying oven for pressurizing and curing. According to the invention, the flatness of the micro-sized packaged strain gauge after surface mounting and curing is greatly improved, and the precision and stability of subsequent stress testing are further improved.

The present invention relates to the technical field of optical fiber sensing. Disclosed are a multi-core grating sensor and a manufacturing method therefor, and a permafrost monitoring method. The multi-core grating sensor comprises a multi-core optical fiber grating, a strain gauge structure, and a demodulator, and the multi-core optical fiber grating comprises four uniformly and symmetrically distributed single-mode optical fibers, a cladding layer wrapping the four single-mode optical fibers, and a coating layer located between the single-mode optical fibers and the cladding layer; the strain gauge structure is attached to the outside of the multi-core optical fiber grating by means of glue bonding; and the demodulator is used for monitoring the dynamic change of the wavelength of the multi-core optical fiber grating, the demodulator comprises a broadband light source and a spectrum analyzer, an incident end of the multi-core optical fiber grating is connected to the broadband light source by means of the single-mode optical fibers, and an exit end thereof is connected to the spectrum analyzer by means of the single-mode optical fibers. Also disclosed in the present invention is a permafrost monitoring method. By means of comprehensive analysis and demodulation of fiber core wavelength variation amounts of a plurality of single-mode optical fibers on a single multi-core optical fiber grating, simultaneous measurement of multiple parameters is achieved, and the permafrost monitoring accuracy is improved.

A strain gauge includes a flexible substrate, at least one resistor formed on or above the substrate, and a pair of electrodes formed on or above the substrate, electrodes being electrically coupled to the resistor via lines, respectively. Each of the lines electrically connects an end of the resistor and a given electrode, the end being situated in a width direction of a grid. Each of the lines includes a first metallic layer and a second metallic layer that is formed of a material having a lower resistance than a material of the first metallic layer, the second metallic layer being situated on the first metallic layer.

The invention discloses an FPC film strain gauge and a manufacturing method thereof. The strain gauge comprises a flexible insulating substrate, a specific-component copper-nickel alloy layer (with 55% of Cu and 45% of Ni and the thickness of 1-5m) sputtered on the flexible insulating substrate, a plurality of independent sensitive grids etched on the alloy layer and arranged along different directions, and a signal lead on the other surface of the substrate, wherein the flexible insulating substrate is connected with the specific-component copper-nickel alloy layer through a via hole with a metalized hole wall. The manufacturing method comprises the steps of drilling, three-step plasma treatment, magnetron sputtering of alloy, electroplating of copper to reinforce the hole wall, double-sided photoetching and etching and the like. Through glue-free sputtering combination and a specific alloy formula, the problems of glue layer aging and temperature drift of a traditional strain gauge are solved, and the product has the advantages of being ultrathin, flexible, high in stability, high in precision and suitable for batch production.

The invention discloses a reduced scale model pile body test structure which comprises a test box, a model pile and a laser scanner, a test soil body is laid in the test box, the model pile is vertically inserted into the test soil body, a reaction wall is installed on one side of the test box, a jack is installed on the reaction wall, and a thrust plate is installed at the front end of the jack; a target is installed on the model pile, and the laser scanner is located above one side of the target. According to the hollow nylon pipe model pile, it is guaranteed that lateral mechanical behaviors are similar, and the material cost and the machining difficulty are greatly reduced; the nylon pipe can also be used as an inclinometer pipe, so that the sensor is convenient to arrange; meanwhile, a grooving pipe inertia moment correction formula is introduced to accurately calculate the actual inertia moment of the grooved pipe, and similar errors are reduced; meanwhile, a strain gauge and a target are matched to comprehensively monitor the model pile from internal deformation, surface strain to top displacement; the surface of the model pile is roughened, so that the surface roughness of the model pile is equivalent to that of a concrete pile, slurry is injected into a pile-soil gap, and the simulation authenticity of the interface friction characteristic is improved.

The invention provides a bolt pre-tightening force monitoring system and method based on multi-strain force acquisition, and the system comprises a plurality of foil strain gauges which are uniformly arranged at the end part of a bolt; the temperature compensation strain gauge is arranged at the center of the end part of the bolt; the signal processing part is in signal connection with the foil type strain gauges and the temperature compensation strain gauge; and the transmission part is electrically connected with the signal processing part. The pre-tightening force of the bolt can be monitored in real time, measurement errors are avoided, so that multi-dimensional strain information of the bolt can be obtained, the multi-dimensional strain information is processed through the signal processing component, more accurate strain information can be obtained, and the accuracy of the bolt is improved. The pre-tightening force dynamic change, caused by load change, vibration relaxation and the like, of the bolt is accurately captured, and the pre-tightening force change can be transmitted through the transmission component, so that a worker can monitor and know the bolt strain condition in real time.

The invention relates to the technical field of flange connectors, in particular to a quick-plug type flange connector for a high-frequency sealing environment. The external connecting mechanism comprises a plurality of flange terminals; the signal transmission mechanism comprises a plurality of female pins and an inner conductor which is in plug-in connection with the female pins; the signal acquisition module comprises a micro strain gauge array and a plurality of micro eddy current sensors; the insertion force monitoring module is used for judging whether the reed of the female pin has stress relaxation or not based on the fluctuation characteristic parameters; the trajectory tracking module is used for determining local relaxation or overall relaxation of the reed based on the trajectory fitting index; the torque adjusting module is used for determining the increment torque of the split spring based on the radial offset of the reed and optimizing the increment torque; and the loss monitoring module is used for determining whether the contact state of the female pin and the inner conductor is qualified or not based on the signal transmission loss so as to optimize the preset characteristic parameters. The signal transmission stability of the flange connector is improved.

The invention relates to a pneumatic membrane structure fluid-structure interaction multi-physics field synchronous test method, which relates to the technical field of vibration measurement, and comprises the following steps: conformally embedding a flexible capacitive sensor array in the surface of a pneumatic membrane structure, detecting mechanical vibration, ultrasonic wave, sound wave or infrasonic wave displacement through capacitance value change (electrical characteristics), and measuring the displacement of the flexible capacitive sensor array; and the capacitance value change rate delta C / C and the displacement delta x are in a linear proportional relationship. According to the pneumatic membrane structure fluid-solid coupling multi-physics field synchronous test method, a flexible capacitive sensor array is conformally embedded in the surface of a pneumatic membrane structure, and mechanical vibration, ultrasonic wave, sound wave or infrasonic wave displacement is directly detected by using capacitance value changes; wherein the linear proportional relation between the capacitance value change rate delta C / C and the displacement delta x is directly determined by the electrode distance and the dielectric constant of the capacitive sensor, so that the physical directness of vibration wave measurement is realized, the error caused by indirect calculation depending on a traditional strain gauge or an optical method is avoided, and the vibration wave displacement measurement precision is remarkably improved to + / -0.5% full scale.

The invention discloses a robot positioning path dynamic planning method adaptive to non-uniformly distributed strain gauges, and belongs to the technical field of robot path planning, and the method comprises the steps: carrying out the double-layer clustering of the non-uniformly distributed strain gauges in a to-be-measured environment based on the positions and surface normal vectors of the strain gauges, and adding a virtual strain gauge in each inner-layer cluster; taking the virtual strain gauge as a positioning target, and generating an initial planning path for positioning the virtual strain gauge based on the GTSP; according to the initial planning path, virtual strain gauge images are sequentially collected through a strain gauge robot, and part of strain gauges in the virtual strain gauge images are positioned; and generating a planned path of the strain gauge robot based on the positioning results of part of the strain gauges, and dynamically adjusting the planned path until all the strain gauges are positioned. According to the method, the positioning effect of the non-uniform strain gauges is remarkably improved, the robustness is high, the automation degree is high, and the method can be adapted to positioning of various strain gauge distribution scenes.

The utility model provides a pre-stressed anchor cable axial force loss and anchoring force deterioration test device under dry-wet cycle, which comprises a test water tank for accommodating a standard rock mass test block; the water injection and drainage device is arranged on the test water tank and used for controlling water level change in the water tank; the anchoring structure is composed of an anchor cable implanted into a preset hole channel of the rock mass test block and a grouting body poured between the preset hole channel and the anchor cable; the strain gauges are arranged at intervals in the axial direction of the anchoring section of the anchor cable; the pressure gauge is sleeved on the anchor cable; the plurality of hygrometers are buried in the grouting body; the strain gauges, the hygrometer and the pressure meter are connected with the data acquisition instrument through cables; and the heating assembly is arranged in the rock mass test block and the test water tank and is used for simulating a temperature change environment. According to the invention, the simulation of the dry-wet cycle working environment of the rock mass test block is realized, the drying process of the rock mass test block is accelerated through the heating assembly, the test time consumption is shortened, meanwhile, the hygrometer is matched to accurately control the dry-wet index of the test sample, and the accurate and controllable test variable is realized.

This invention belongs to the field of ship shafting condition monitoring and fault diagnosis technology, specifically relating to a bearing load measurement device and its data acquisition and transmission method. This invention effectively suppresses temperature drift, mechanical vibration, and electromagnetic interference by rationally arranging strain gauges, employing high-precision synchronous sampling, and combined denoising processing, thereby improving the accuracy of signal acquisition. Embedding moment balance and beam strain consistency equations into the machine learning model significantly improves the accuracy of load prediction. High-speed multi-channel synchronous sampling technology ensures data time alignment, and a multi-algorithm denoising scheme combining wavelet thresholding and bandpass filtering effectively filters out mechanical vibration and electromagnetic interference. A multi-mode communication module enables separate channel transmission of real-time load data and raw strain data, balancing the low-latency requirements of online monitoring with the large-scale data archiving requirements of offline analysis. The introduction of edge computing significantly reduces cloud transmission pressure and improves the real-time performance of load measurement.