27 results about "Structural temperature" patented technology

This invention relates to the field of bridge engineering technology, specifically to a method and system for calculating temperature fatigue damage. The method includes the following steps: establishing daily temperature curves for the top and bottom slabs based on measured temperatures over a set time period; obtaining the absolute value of the overall temperature difference, the maximum positive vertical temperature difference between the top and bottom slabs, and the absolute value of the maximum negative vertical temperature difference between the top and bottom slabs based on the daily temperature curves; determining the daily equivalent temperature stress amplitude based on the daily absolute values ​​of the overall temperature difference, the maximum positive vertical temperature difference between the top and bottom slabs, and the maximum negative vertical temperature difference between the top and bottom slabs; and calculating the temperature fatigue damage of the bridge structure based on the S-N curve and the daily equivalent temperature stress amplitude. This invention provides a method and system for calculating temperature fatigue damage, which can solve the problem of the need for highly computational equipment and the difficulty in calculating temperature fatigue in existing technologies.

A temperature monitoring unit may be removably installed inside an aircraft wing structure for monitoring temperature conditions along the span of the wing. The wing structure has a temperature-sensitive device (162) for monitoring a temperature con- dition, which is attached to a support frame (173). The support frame and attached temperature-sensitive device may be installed as a unit within the wing structure. The support frame may be configured for sliding engagement inside the wing structure, for example, with a set of tracks.

The utility model relates to the technical field of regulator, concretely relates to a regulator with temperature protection function, regulator body, back cover, integrated circuit and temperature sensor, the recess is arranged to the lower surface of regulator body, the back cover can be connected in the recess along the mouth and is formed with the cavity structure with the recess cooperation, the integrated circuit is arranged in the cavity structure, the boss is arranged on the back cover, the boss is hollow structure, the temperature sensor is arranged in the lower end in this boss, the temperature sensor is connected on the integrated circuit through the wire, among them, the regulator with temperature protection function is installed on the generator back cover, the boss lower end can contact the copper line on the stator assembly of generator. The boss contacts on the copper line on the stator assembly, the heat that the copper line of stator assembly sends out can be passed through the boss and is delivered to the temperature sensor in the working process of generator, the temperature sensor is connected with the integrated circuit, and the integrated circuit adjusts the duty cycle of generator through the temperature value of measurement.

The invention relates to a fluid-solid-heat coupling calculation method and device based on wall surface temperature heat flow correction, and relates to the technical field of fluid-solid coupling calculation. The method comprises the steps of calculating initial wall surface heat flow and initial surface pressure; performing structure transient heat conduction calculation in the initial time interval by taking the initial wall surface heat flow as a heat boundary condition to obtain first structure temperature distribution; calculating structural deformation to obtain a first wall surface heat flow and a first surface pressure; repeating the steps to obtain second structure temperature distribution; in the first time interval, calculating a corrected heat flow through a heat flow interpolation model; judging whether the corrected heat flow exceeds a precision threshold value or not; if not, skipping structural deformation and fluid domain calculation at a second moment, and entering a second coupling step; if yes, calculating structural deformation and a fluid domain at a second moment, and entering a second coupling step; and the preset total simulation time is reached. According to the method, the simulation calculation efficiency can be improved while the calculation precision is ensured.

The invention provides a measuring device and method for measuring the liquid level height of liquid in a low-temperature container, and relates to the field of measuring the liquid level height of the liquid in the low-temperature container, the measuring device comprises a liquid frame structure, a temperature sensor, a signal acquisition structure and a data processing structure, the liquid frame structure comprises an outer frame structure and an inner frame structure, the outer frame structure and the inner frame structure are each of a cuboid structure. A plurality of temperature sensors are arranged, the plurality of temperature sensors are arranged on the side wall of the inner frame structure, the plurality of temperature sensors are distributed in the direction perpendicular to the ground, and the temperature sensors are attached to the outer side wall of the inner frame structure; the signal acquisition structure is electrically connected with the temperature sensor, and the signal acquisition unit is arranged on the outer frame structure; and the data processing structure is electrically connected with the signal acquisition structure. According to the invention, the problems of intrusive damage to the heat insulation layer, weak anti-interference capability and limited application scene are solved.

The invention relates to the technical field of positive displacement pumps, and discloses a pump and a mechanical seal wear-resisting structure.The pump comprises a base, a motor fixedly arranged on the base, a rotating shaft fixedly arranged at the output end of the motor and a pump body fixedly arranged on the base and further comprises a connecting support, and a fixing block is fixedly installed in the connecting support; a wear-resistant structure is movably mounted in the fixed block; through the wear-resistant structure, the first-stage pushing structure is triggered when the temperature rises for the first time, the second-stage pushing structure is triggered to automatically enhance the lubricating effect when the temperature rises continuously and abnormally, and intelligent lubrication supplied according to needs is achieved by means of thermophysical characteristics and magnetic coupling of materials; the risk that the mechanical seal is damaged in a dry grinding state is greatly reduced, the service life of the pump is prolonged, lubricating oil is distributed according to needs, and waste is avoided.

The utility model relates to the technical field of sensor mounting equipment, in particular to a mounting structure, a temperature sensor and a reaction kettle, the mounting structure comprises a flange, a base plate and a lining plate, the base plate is positioned on one side of the flange, a first mounting hole is formed in the center of the base plate, and the lining plate is positioned on the other side of the flange. By additionally arranging the base plate, the direct acting force of negative pressure in the reaction kettle on the joint of the temperature measuring rod can be dispersed, the overall structural strength of the mounting structure is enhanced, the risk of tearing the lining is reduced, the service life of the temperature sensor is prolonged, the maintenance cost of equipment is reduced, and the service life of the temperature sensor is prolonged by enhancing the stability of the mounting structure. According to the utility model, the temperature measurement accuracy of the temperature sensor is ensured, production safety accidents and environmental protection risks caused by inaccurate temperature measurement are avoided, and the production safety and stability are improved.

The application discloses a kind of for space electron beam welding test device, comprising: equipment controller, inside the box is placed, with moving mechanism, infrared thermal imaging detector and electron beam gun connection;Mobile control instruction is sent to moving mechanism, and the detection of structural temperature field distribution performance;Electron beam gun, the electron beam generated, for the welding, cutting or additive forming on test workpiece after heating and melting of metal wire;Excess protection device is placed below electron beam gun, to prevent metal droplet on test workpiece from flying out.Infrared thermal imaging detector, the cutting, welding and additive process of electron beam gun are photographed;Temperature is measured;Moving mechanism moves according to mobile control instruction;Radiation plate radiates heat generated to the outside of box;Test workpiece is placed on the upper surface of excess protection device, excess protection device is connected with moving mechanism, moves with moving mechanism, drives test workpiece to move, realizes the processing of test workpiece.

The application provides a kind of upper bearing type steel pipe arch installation monitoring positioning method, belongs to steel pipe arch installation monitoring positioning technical field, the method comprises the following steps: step 1: the overall temperature data of arch rib linear is monitored all-weather continuously by mathematical statistics and comparative analysis method;Step 2: the accuracy of primary control network is analyzed, and the accuracy meets the installation requirements;Step 3: the encryption control network is established, and the accuracy of encryption control network is optimized;Step 4: the automatic collection of arch rib linear three-dimensional coordinates is realized through encryption control network;Step 5: the collected data is transmitted, stored and displayed on cloud platform.The application realizes the automatic monitoring method of arch rib installation linear by laying encryption and accuracy analysis of arch bridge construction control network, and realizes the automatic monitoring of arch rib installation linear by taking high-precision independent control network as the benchmark and matching cloud platform, analyzes the influence of structural temperature change on arch rib three-dimensional linear by automatically collecting, storing and displaying monitoring data, realizes the automatic monitoring of arch bridge main arch linear, realizes high-precision detection, avoids deviation, and provides high-precision data support for steel pipe arch installation.

A structural temperature self-monitoring system based on a chiral structured shape memory polymer microporous plate, comprising a fixing apparatus, a chiral structured microporous plate, and a triboelectric nanogenerators set. Each chiral element of microporous plate is provided with a hexagonal cell and six chiral legs, and the microporous plate may occur specific deformation under certain conditions. The microporous plate is fixed on the fixed apparatus, and the triboelectric nanogenerators set comprises two lateral sliding mode triboelectric nanogenerators that are symmetrically distributed; the data of deformation of chiral structured microporous plate in converse directions is collected; and a voltage is emerged for measurement. The system can monitor the temperature of any portion of structure without an external power supply, and obtain the temperature data possessing both timeliness and accuracy under the condition of ensuring the integrity and representativeness of temperature data.

The application discloses a kind of ceramic radome transient thermal stress fast calculation method along flight trajectory, comprising: determining calculation input, including the aerodynamic thermal environment of ceramic radome and the structure scheme to be evaluated;Set the circumferential discrete strategy of ceramic radome, to determine the multiple meridional plane of ceramic radome;Interpolation model is constructed to aerodynamic thermal environment, determines the most severe meridional plane of ceramic radome aerodynamic heating in flight;Build the two-dimensional feature structure model of ceramic radome transient heat transfer and thermal stress analysis, and determine the external contour line of two-dimensional feature structure model;The axial thermal response calculation interval of ceramic radome is constructed and interpolation calculation is carried out, and the aerodynamic thermal environment parameter of each flight time of external contour line is obtained;The heat transfer calculation grid division is carried out to two-dimensional feature structure model, and the structure transient temperature distribution of two-dimensional feature structure model is calculated;Based on the structure transient temperature distribution, calculate structure temperature gradient;Utilize structure temperature gradient to calculate the transient thermal stress distribution of ceramic radome.

The application relates to the field of structural engineering and artificial intelligence, and particularly relates to a long-span space steel structure temperature field prediction method based on a space-time graph neural network, which comprises the following steps: establishing a three-dimensional geometric model of a steel structure to be measured, performing transient thermal analysis on each node in the steel structure to be measured by using a finite element method; converting the three-dimensional geometric model into a graph model; constructing a temperature field prediction model according to the graph model; configuring the temperature field prediction model to take a node feature matrix and an edge feature matrix as input, extracting spatial dependence features of each node by using a graph neural network; extracting time sequence features representing temperature changes of the nodes in the spatial dependence features by using a recurrent neural network; determining periodic trend features of the time sequence features by using an attention mechanism, and mapping the fused features into node temperature prediction values; inputting limited monitoring point data on the steel structure to be measured into the trained temperature field prediction model, and determining a temperature field distribution of the steel structure to be measured.

The invention provides a method for analyzing thermal stress of a thin-wall reinforced cylindrical structure under a temperature spectrum, and belongs to the technical field of structural thermal stress analys.The method comprises the steps that thermal stress distribution of the thin-wall reinforced cylindrical structure under any temperature load working condition is obtained, recording the inner wall loading temperature, the temperature of the key part and the thermal stress of the key part of the thin-wall reinforced cylindrical structure under the temperature load working condition; a thermal stress expression is constructed according to the linear relation between the thermal stress and the difference between the inner wall loading temperature and the temperature of the key part, and correlation coefficients are obtained through calculation of the thermal stress expression; and obtaining any temperature load spectrum, and estimating the thermal stress of the corresponding key part under any temperature load based on the temperature load spectrum, the thermal stress expression and the correlation coefficient, thereby obtaining the thermal stress spectrum of the key part of the thin-wall reinforced cylindrical structure.

This invention relates to the field of switchgear monitoring technology and discloses an online monitoring system for the mechanical characteristics of switchgear, comprising: data acquisition; calculation of the energy storage input integral; extraction of the electromagnetic release time; calculation of the structural transmission delay; calculation of the baseline delay; calculation of the health benchmark of the structural temperature sensitivity coefficient; and output of monitoring results. This invention separates the additional mechanical delay caused by temperature variations in the upper and lower contact boxes of the switchgear from the overall action delay, distinguishing the effects of temperature coupling and conventional factors such as uniform temperature energy storage input on mechanical action. The monitoring process relies on electrical and temperature signals, eliminating the need for additional mechanical displacement sensors. It is adaptable to the internal space and insulation constraints of switchgear and can be used for monitoring new equipment commissioning and intelligent upgrading of in-operation equipment. It can provide corresponding reference information for switchgear condition assessment and operation and maintenance decisions, meeting the operation and management needs of the entire life cycle of switchgear.

The utility model discloses a kind of mould structures of uniform heat transfer, including lower mould and the upper mould of lower mould top, the lower mould includes bottom plate, the bottom plate center position is equipped with several first through holes, the bottom plate bottom end is provided with several spiral grooves, the upper mould includes top plate, the top plate center position is equipped with several second through holes, the bottom plate and top plate are commonly provided with two liquid guide mechanisms, the bottom plate bottom end one side is equipped with two through holes, which communicate with the one end of two liquid guide mechanisms, the bottom plate inside is equipped with the first horizontal hole, which communicates with the other end of two liquid guide mechanisms, the first through hole and second through hole are provided with four, the utility model has the advantage of uniform heat transfer, solve the problem of current mould structure temperature uneven.

The invention relates to a temperature-curvature model inverse finite element deformation reconstruction method of a large plate under a thermal load. The method comprises the following steps: S1, obtaining a temperature field and a displacement field of a structure at M moments in the whole heating process; s2, acquiring a curvature field of the structure at M moments; s3, obtaining a temperature-curvature power function fitting coefficient of each position, and obtaining a structure temperature-curvature model; s4, fitting to obtain a temperature field and a single-sided strain field of the structure, taking the temperature field obtained by fitting as the input of the temperature curvature-model in the S3, and further obtaining a curvature field of the structure at the moment; s5, obtaining double-sided strain of the structure; and S6, obtaining a unit reconstruction equation set of each unit under the reverse finite element algorithm, assembling to obtain an overall reconstruction equation set, substituting the boundary conditions, and solving to realize the reconstruction of the global displacement field of the structure. The method solves the problem that the inverse finite element method is difficult to realize deformation reconstruction of the large plate structure under the thermal load during single-sided strain measurement.

This invention relates to a fluid-structure interaction (FSI) calculation method and apparatus based on wall temperature heat flux correction, belonging to the field of FSI calculation technology. The method includes: calculating initial wall heat flux and initial surface pressure; using the initial wall heat flux as the thermal boundary condition, performing transient heat conduction calculations on the structure within an initial time interval to obtain a first structural temperature distribution; calculating structural deformation to obtain the first wall heat flux and the first surface pressure; repeating the steps to obtain a second structural temperature distribution; calculating the corrected heat flux using a heat flux interpolation model within the first time interval; and determining whether the corrected heat flux exceeds an accuracy threshold; if not, skipping the structural deformation and fluid domain calculations at the second time step and proceeding to the second coupling step; if so, calculating the structural deformation and fluid domain at the second time step and proceeding to the second coupling step; until the preset total simulation time is reached. This method can ensure calculation accuracy while improving simulation efficiency.

The utility model relates to the technical field of wind power generation, and provides a dual-mode stator contactor and copper bar temperature measurement and cooling monitoring device which comprises a structure to be subjected to temperature measurement, a temperature detection assembly, a heat dissipation device and a control assembly. The temperature detection assembly is in contact with the to-be-measured structure and is used for detecting the real-time temperature of the to-be-measured structure. The heat dissipation device is used for dissipating heat of the to-be-measured structure. The heat dissipation device and the temperature detection assembly are both electrically connected with the control assembly, and the control assembly is used for obtaining the real-time temperature and sending a working instruction to the heat dissipation device. Therefore, the real-time temperature of the structure to be subjected to temperature measurement can be detected more accurately, the temperature of the structure to be subjected to temperature measurement can be controlled conveniently, and normal operation of the device is facilitated. And when the temperature of the structure to be subjected to temperature measurement is relatively high, the heat dissipation structure can dissipate heat of the structure to be subjected to temperature measurement, so that the temperature of the structure to be subjected to temperature measurement can be prevented from being too high. In addition, the function of automatically dissipating heat of the structure to be subjected to temperature measurement is achieved, and the purposes of energy conservation and environmental protection are achieved.

The application discloses a temperature detection structure, a temperature protection method and device and a motor controller. The temperature detection structure comprises a cooling channel. A plurality of power modules are arranged on a cooling path of the cooling channel. Cooling liquid can be introduced into the cooling channel to dissipate heat of the plurality of power modules. A first temperature detection unit is arranged at a liquid outlet of the cooling channel. A second temperature detection unit is arranged between two adjacent power modules on the cooling path. The technical scheme of the application is beneficial to monitoring the temperature inside the motor controller in time, protecting the motor controller and reducing production cost.

The invention discloses a forming process optimization method and system for a nanometer reinforced hose, and relates to the technical field related to hose forming optimization, and the method comprises the steps that the temperature of a multi-layer tubular structure is detected in real time; based on the multi-layer temperature distribution information, cooling rate relation matching of the multi-layer structure is carried out; cooling control parameter selection of an inner wall core rod cooling system and an outer wall cooling system is executed; cooling transfer analysis is executed based on the outer layer-inner layer collaborative cooling parameter space, verification of an inner layer, an outer layer and a middle layer is executed according to a transfer result, and M groups of collaborative parameters conforming to constraints are determined; cooling deviation optimal screening is carried out, and cooling forming optimization is carried out according to a screening result. The technical problems that in the prior art, due to the fact that the cooling rate of the multi-layer structure is difficult to accurately match, collaborative cooling of the nano-reinforced hose multi-layer structure is not accurate enough, the product quality is not stable, and the rejection rate is high are solved, and the technical effects that accurate collaborative cooling of the nano-reinforced hose multi-layer structure is achieved, and the product defect rate is reduced are achieved.

The utility model relates to a kind of ring structure temperature compensation contact, it includes the insertion hole extending along the axial direction, the insertion hole front end is used to the contact hole side of the insertion needle of suitable end insertion and is equipped with split groove, the split groove extends along the axial direction of insertion hole and is connected with the inside and outside of contact hole, the outer periphery of the contact hole front end is equipped with ring groove, the ring piece of positioning assembly in the ring groove can provide the contact hole with the elastic force of its clamping suitable insertion needle.The insertion hole of the ring structure temperature compensation contact of the utility model is set with split groove on one side, so that it has radial deformation ability, it can be opened when suitable insertion needle is inserted, and the ring piece is provided outside the insertion hole, the radial holding force is provided for the insertion hole by the ring piece, so as to ensure the reliable contact of insertion needle and insertion hole.

The invention relates to an efficient additive manufacturing thermal coupling topological optimization method considering suspension constraints. The method comprises the following steps: firstly, constructing a thermal-mechanical coupling topological optimization model considering the suspension constraint based on a suspension angle projection function; secondly, a multi-grid preprocessing conjugate gradient method is introduced to efficiently solve a structure heat conduction and thermal coupling balance equation, and structure temperature field and displacement field information is obtained; and finally, based on an adjoint variable method, deriving the sensitivity of a target function about topological design variables, and updating the topological configuration of the thermal coupling structure by adopting a gradient-based moving asymptote optimization algorithm. According to the method, the topological optimization model considering the suspension constraint is constructed for the topological optimization problem of the thermal coupling structure for additive manufacturing, the efficiency of structural thermal coupling performance analysis is greatly improved through the multi-grid preprocessing strategy, and efficient structural thermal coupling topological optimization design meeting the additive manufacturing requirement is achieved.

The application discloses a kind of based on active temperature control horizontal machining center structure thermal error suppression method, comprising the following steps: based on Green function method establishes machine tool structure equivalent body steady-state temperature field analytical model, obtains the overall temperature field distribution of machine tool structure under the action of multiple heat sources by the superposition of the temperature field change of structure caused by single heat source, based on finite element method calculation structure thermal deformation, realize the quick solution and prediction of thermal deformation law of key path to arbitrary position heat source;Calculate the thermal power-thermal deformation mapping coefficient TPDMC of key path under the action of multiple heat sources, analyze the influence law of heat source layout position and its thermal power change on the thermal characteristics of machine tool structure, realize the layout design of active temperature control source under specific endogenous heat source layout;Active temperature control is realized based on multi-loop differentiated active temperature control system;In the case of no temperature control, the thermal-induced perpendicularity of machine tool is measured by ball bar, and the experiment is repeated after applying active temperature control, so as to verify the inhibition effect of the proposed method on thermal error.The thermal error suppression method proposed by the application can significantly improve the overall structure thermal deformation of machine tool, and effectively improve the precision stability of machine tool.

The invention discloses a temperature compensation method for data automatic alignment granularity, which comprises the following steps of: performing data acquisition on bridge monitoring equipment which is installed and has a stable data change rule, acquiring structure temperature data and monitoring item data required to be subjected to temperature compensation to obtain acquired data, and aligning the data granularity before temperature compensation, according to the method, the data are ensured to be located on the same timestamp, calculation can be rapidly carried out through an automatic temperature compensation algorithm after the equipment data are collected, an accurate fitting equation is obtained, the process not only avoids manual temperature compensation operation when the equipment leaves a factory in the earlier stage, but also reduces the possibility of manual temperature compensation errors, and in the project analysis process, the calculation efficiency is greatly improved. The monitoring system can draw a time history curve graph and display characteristic values in time according to data uploaded by equipment, a clear analysis direction is provided for data analysts, the data analysis efficiency is greatly improved, and the data analysts can quickly find out data abnormity reasons and diagnose the real change condition of a bridge structure.

The utility model relates to the technical field of heating handles, in particular to an intelligent heating handle. Comprising a handle body structure, an independent heating wire unit and a patch temperature sensor. The independent heating wire units are embedded in the surface of the handle main body structure in a sunken mode in the length direction of the handle main body structure, and heating of the independent heating wire units is controlled through a controller; the patch temperature sensors are provided with a plurality of groups of structures which are respectively embedded in different positions on the surface of the handle main body structure in a sunken manner and are used for monitoring the temperature of the handle main body structure, so that the service life of the handle is prolonged, and the temperature of the handle can be monitored and adjusted in real time through accurate temperature control; the temperature is kept within a comfortable range all the time, the user experience is improved, meanwhile, potential safety hazards caused by too high temperature are avoided, and the safety effect of the handle in the using process is guaranteed.