1099results about "Torque measurement" patented technology

The invention relates to the technical field of motor detection, and discloses a motor instantaneous torque measurement method and system based on a high-bandwidth sensor, and the method comprises the steps: synchronously collecting a torque signal and a multi-source interference variable through the high-bandwidth sensor, and forming an original torque sequence after time synchronization superposition; extracting disturbance frequency characteristics through multi-scale wavelet transform and spectral analysis; a pre-trained adaptive filter model is utilized to generate a filter coefficient matched with the working condition, and primary filtering is completed; residual fluctuation is suppressed in combination with Kalman state estimation, and an optimized torque estimation value is obtained; parameter self-adaptive compensation is realized through online calibration weight updating, and a stable torque measurement sequence is output; load abrupt change pre-judgment and threshold value dynamic updating are achieved based on time-frequency correlation analysis, and finally rapid measurement convergence after working condition abrupt change is ensured through a closed-loop reset mechanism. According to the method, the problem of low instantaneous torque measurement precision in the prior art can be solved.

The invention discloses an automatic torsion testing machine. The automatic torsion testing machine comprises a first table support, a second table support, a third table support, a fourth table support and stand bars, wherein the framework of the whole torsion testing machine is formed by the first table support, the second table support, the third table support and the fourth table support, the stand bars are installed on the bottom corners of the framework, a working table is arranged above the third table support and the fourth table support, a second part detecting sensor is installed above the third table support and on the working table, and a first part detecting sensor is installed above the fourth table support and on the working table. The automatic torsion testing machine has the advantages that working efficiency is improved, labor intensity of workers is relieved, and the integral advanced level of an enterprise can be improved.

A strain wave gearing (1) is configured to have a unitized structure having a main bearing (5) that supports an internally toothed gear (2) and an externally toothed gear (3) in a manner that allows relative rotation, and an output flange (6) that is linked to the externally toothed gear (3). The externally toothed gear (3) is formed in the shape of a wine glass and ensures a large hollow diameter, which is required in cases where the externally toothed gear (3) is incorporated into a robot joint part or the like. A strain gauge (101) of a torque sensor (100) is attached to an outward-facing end surface portion of the output flange (6) linked to the externally toothed gear (3). The torque sensor (100) is capable of precisely detecting rotational torque without being affected by flexing of the externally toothed gear (3), and elements such as the strain gauge (101) are not exposed to oil, grease, or the like.

The invention discloses a robot joint transparency testing method and device, and belongs to the technical field of robot joint testing. According to the method, the transmission transparency is evaluated by testing three indexes including the ratio of joint reverse drive torque to the maximum output torque, the torque control bandwidth and the correlation between motor current and output torque; the device comprises a driving mechanism, a loading mechanism and a test platform with a sliding assembly, the driving mechanism is connected with a joint input end through a coupling, and the loading mechanism is connected with an output end. According to the invention, a quantitative evaluation system of transmission transparency is established, a modular device capable of separably testing joint motor reverse drive torque (distinguishing charged / uncharged states) and speed reducer forward / reverse drive efficiency is designed, and accurate data support is provided for joint performance optimization.

The invention provides a gearbox variable working condition mechanical loss torque efficiency correction test method based on a neural network. The method comprises the following steps: S1, determining a to-be-tested gearbox and basic parameters; s2, building a gearbox variable working condition test system; s3, acquiring basic operation data of the gearbox; s4, calculating theoretical mechanical loss torque and efficiency of the gear box; s5, the actually-measured mechanical loss torque and efficiency of the gearbox are collected, and an error data set is generated; s6, constructing and training an error correction model fusing the back propagation neural network and support vector regression; s7, performing mechanical loss torque and efficiency correction based on the fusion model; and S8, verification and feedback optimization of a correction result. According to the method, on the basis of all-working-condition data, the defect of a single model is overcome through double-algorithm fusion, precise correction of the mechanical loss torque and efficiency of the gearbox under the variable working conditions is achieved, and reliable data support is provided for gearbox design optimization, working condition matching and energy efficiency evaluation.

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.

A magnetostrictive torque sensor for measuring torque that is applied to a rotating shaft having magnetostrictive characteristics, includes a flexible substrate having a plate-shaped base material made of a flexible dielectric material and a plurality of detection coils formed by conductor patterns on front and back sides of the base material, and a measurement unit that measures the torque by the change in inductance of the plurality of detection coils due to the change in magnetic permeability of the rotating shaft, wherein the plurality of detection coils includes a first detection coil comprising a first coil winding including a first inclined portion inclined to one side with respect to an axial direction of the rotating shaft, and a second detection coil comprising a second coil winding including a second inclined portion inclined to the other side with respect to the axial direction of the rotating shaft, wherein the flexible substrate includes parallel extending portions where the first coil winding and the second coil winding extend parallel to sandwich the substrate, and wherein a centerline of the first coil winding and a centerline of the second coil winding are misaligned in a direction perpendicular to their respective centerlines in the parallel extending portions.

A power control actuator of the present disclosure includes: an output-side bearing provided on a side on which a torque is to be outputted; a speed reducer including an output shaft; and a torque sensor that detects a torque associated with rotation of the output shaft, in which an outer peripheral surface of the torque sensor and an inner peripheral surface of the output-side bearing constitute a spigot joint structure, an inner peripheral surface of the torque sensor and an outer peripheral surface of the output shaft of the speed reducer constitute a spigot joint structure, and the output-side bearing, the output shaft of the speed reducer, and the torque sensor have a coaxial structure.

The invention discloses a silo structure slip form construction digital monitoring system, which comprises a monitoring module used for acquiring elevation and torsion data of a slip form platform and inclination angle data of a silo wall in real time, and a data acquisition and forwarding module used for acquiring and forwarding monitoring data of the monitoring module, the data analysis processing module is used for receiving monitoring data, and the user side module is used for receiving difference adjustment information output by the data analysis processing module, generating a monitoring curve and a report form according to the difference adjustment information and visualizing the monitoring curve and the report form. The monitoring module comprises a slip form platform elevation monitoring assembly, a slip form platform torsion monitoring assembly and a silo wall inclination angle monitoring assembly. The detection system can automatically monitor the elevation of the slip form platform, the inclination angle of the silo wall and the torsion of the slip form platform in real time in the construction process of the silo structure at the same time, report and curve visualization is carried out on detection results, the construction process of the slip form is guided, the construction efficiency of the slip form is improved, and safety accidents can be avoided.

The invention discloses a cutter wear monitoring method based on a physical guidance dynamic gating chart convolution framework, and the method comprises the steps: 1, collecting a cutting force signal, a bending moment signal and a vibration signal of a cutter and a workpiece in the operation process of the cutter; 2, performing data preprocessing on the acquired multi-source sensor signal sequence; 3, calculating a Pearson correlation coefficient between each feature in the original feature set and the tool wear; 4, screening the first Top-k features to construct a sensitive feature set integrating force, vibration and bending moment; 5, extracting cutter wear information in the sensitive feature set by adopting a dynamic gated graph convolutional network, and establishing long-term dependency between features; and 6, performing output decoding on the features after the long-term dependency is established, establishing a mapping relation between the tool wear value and the input features, and outputting a tool wear monitoring value. According to the method, deep fusion of the graph structure and the time sequence features is realized, and the accuracy and stability of tool wear prediction are effectively enhanced.

The invention relates to the technical field of film strain, in particular to a preparation and installation method of a film strain sensor and a harmonic reducer. The preparation and installation method comprises the steps that the surface of a workpiece to be installed is coated with a polyamide acid solution, then heating is conducted, and polyamide acid is subjected to dehydration cyclization to form a polyimide film attached to the surface of the workpiece to be installed; and then, forming a laser-induced graphene electrode pattern on the polyimide film. The harmonic reducer comprises a wave generator, a rigid gear, a flexible gear and a thin film strain sensor, the flexible gear is connected into the rigid gear in a toothed mode, and the wave generator is arranged in the flexible gear; the film strain sensor comprises a strain film and a graphene electrode, the graphene electrode is formed on the strain film, and the strain film is in direct contact connection with the surface of the flexible gear. Through the film strain sensor adhered to the surface of the workpiece to be installed, in-situ torque detection can be achieved, measurement errors, hysteresis, instability and the like caused by a glue joint layer are avoided, and measurement is more accurate.

A portable on-vehicle dynamometer comprises a containment chassis (2), a drum (3) rotatably housed in said containment chassis (2) to rotate around a load shaft (4), mechanical transmission means (5) adapted to connect said load shaft (4) to the hub of a wheel of the vehicle being measured to transfer the motion of the vehicle engine to said drum (3), wherein said mechanical transmission means (5) comprise a connection flange (6) provided with a central axis of rotation and suitable to be fixed stably but removably to the hub of the vehicle wheel, wherein said mechanical transmission means (5) further comprise a CV joint (7) adapted to connect said flange (6) with one end of said load shaft (4) and designed to allow mutual angular regulation between said load shaft (4) and the central rotation axis of said flange (6) with respect to at least one inclination plane.

The invention discloses a method and a system for acquiring the output power of a turbine, relates to the technical field of turbine monitoring, and provides a five-stage closed loop aiming at a ship high-temperature wet vibration environment, and millisecond-stage alignment torque, rotating speed, fuel oil, exhaust and vibration signals are synchronously acquired in a multi-source manner; secondly, a credibility matrix is constructed through null drift detection, wavelet denoising and consistency verification, and initial power is obtained through Kalman fusion; performing real-time comparison by using a digital twinborn model, and adaptively adjusting the weight of the sensor to output a correction power curve; then decomposing the virtual-real residual into slow drift, transient and harmonic factors, and dynamically modifying the sensitivity and the sampling rate to realize source end self-compensation; and finally, performing windowed compression, partitioning and salting hash on the correction curve, quickly confirming the right of the three-node lightweight block chain, and writing the fingerprint back to a twin model to realize minute-level tamper-proof traceability. The method has the advantages of high-resolution measurement, rapid deviation correction and real-time credible evidence storage.

Disclosed is a strain-generating structure and a force sensor. The strain-generating structure comprises at least one strain body configured to generate strain under an external force. A surface of the at least one strain body is provided with at least one concave-convex structure. The at least one concave-convex structure is provided with a concave portion and a convex portion adjacent to the concave portion. The convex portion of the at least one concave-convex structure is provided with at least one strain gauge. The at least one strain gauge is configured to sense the strain. The strain-generating structure has a datum plane perpendicular to an axis of the strain-generating structure. Each of the at least one strain gauge is disposed parallel to the datum plane. The strain-generating structure attaches the strain gauges to a plane that facilitates operation of the machine and considers the detection performance of a six-axis force / torque sensor.

The invention discloses a cam indicator and a detection method. The cam indicator comprises a tensioning seat mechanism, a lifting mechanism and a cam mechanism which are arranged on a rack from top to bottom. The tensioning seat mechanism comprises a tensioning seat and a positioning head, wherein the tensioning seat is arranged at the upper end of the rack in a vertically movable mode, the positioning head is arranged on the tensioning seat, and a pressure sensor is arranged at the position, close to the positioning head, in the tensioning seat. The lifting mechanism comprises a lifting seat which is arranged on the rack in a manner of moving up and down, and a displacement sensor is arranged in the rack close to the lifting seat; the cam mechanism can drive the lifting seat to move back and forth in the vertical direction; the provided cam indicator can effectively simulate the real working condition of the shock absorber, can effectively collect displacement and pressure data, can effectively adjust simulation according to the sizes of shock absorbers of different models, and can adjust the displacement distance according to detection requirements.

The invention provides a testing device for an underground sealing element. The testing device comprises a detection part and an input part, a sealing cavity used for simulating the underground environment is formed in the detection part, and an assembling cavity used for assembling a sealing piece and a detection cavity used for detecting leakage are further formed in the detection part. Before the sealing element is assembled, the sealing cavity is communicated with the detection cavity through the assembling cavity. After the sealing element is assembled, the sealing cavity and the detection cavity are separated by the sealing element. The detection part can drive the sealing element to rotate so as to measure the torque of the sealing element. The output end of the input part communicates with the sealing cavity, and slurry under the preset pressure and the preset temperature can be conveyed into the sealing cavity through the input part so as to control the pressure and the temperature of the sealing cavity. And the detection part can also detect the existence condition of slurry in the detection cavity so as to measure the failure leakage condition of the sealing element. The underground environment and the working state of the sealing element can be simulated, so that a large amount of experimental data can be obtained, and the usable time of the sealing element can be accurately mastered in advance.

The invention discloses a harmonic reducer integration-based strain torque sensor, and relates to the technical field of sensors, the harmonic reducer integration-based strain torque sensor comprises an annular strain gauge and a signal acquisition module, and the annular strain gauge is electrically connected with the signal acquisition module; the annular strain gauge is mounted on the bottom surface of the flexible gear and is concentric with the flexible gear; the signal acquisition module is mounted outside the hollow inner shaft of the flexible gear; during working, when output power of the flexible gear is subjected to resistance, the bottom surface of the flexible gear generates strain, the annular strain gauge converts a strain signal into an analog voltage signal through a Wheatstone bridge formed by a resistance wire grid, the analog voltage signal is output to the signal acquisition module, and a force value signal is obtained after digital-to-analog conversion; by arranging the annular strain gauge on the bottom surface of the flexible gear, real-time detection of output torque is realized, extra flexible introduction of deformation of the peripheral surface of the flexible gear is avoided, structural deformation is reduced, interference of rotation of a wave generator on signals is effectively suppressed through a Wheatstone bridge design, and measurement precision and stability are ensured.

A method is provided for determining a torque value of a torque applied by an electronic torque wrench that includes a handle, a square drive and a strain gauge. The method includes measuring an angular velocity and a normal acceleration of the handle as the handle is rotated relative to the square drive, and finding a length of a moment arm from the square drive to the handle based on the angular velocity and the normal acceleration. The method includes measuring a bending moment of a rotational force at the strain gauge that is located at a known distance from the handle, the bending moment measured as the rotational force is applied at the handle that produces the torque at the square drive. And the torque value is determined based on the bending moment, the length of the moment arm and the known distance.

This sensor device comprises a sensor body (13 to 16, 21, 22), a sensor housing (30), a connector housing (50), and a flange 51. The sensor body (13 to 16, 21, 22) captures changes in a physical quantity, and the sensor housing (30) accommodates at least a portion of the sensor body. The connector housing (50) is provided with a detecting element (40) that outputs a signal corresponding to a change in the physical quantity, and the part in which the detecting element (40) is provided is inserted inside the sensor housing (30). The flange (51) extends outward from the connector housing (50), and a joining surface (53) facing the sensor housing (30) side is joined to the sensor housing (30). The joint surface (53) of the flange (51) is inclined with respect to a virtual plane (VS) that is perpendicular to a direction (ID) in which the part of the connector housing (50) in which the detecting element (40) is provided is inserted into the sensor housing (30).

The invention discloses a quantitative test method and system for a peak locked-rotor torque of a robot joint module, and relates to the technical field of robot joint performance evaluation, and the method comprises the steps: extracting a torque time-calendar curve of the joint module, defining the peak locked-rotor torque as a controlled low-frequency fatigue loading process, and building a mapping model of a torque amplitude and a failure cycle index; constructing a test system, and performing torque-current static calibration; embedding a specific excitation function in a current loop of the servo driver; the bus voltage and rotating speed change rate is monitored in real time, and the voltage and current impact at the unloading moment is inhibited by adopting a back electromotive force compensation algorithm and combining an energy consumption discharge loop; and repeatedly loading until the structure is damaged, recording the number of cycles, and drawing a peak torque-life curve as a basis for predicting the life of the whole machine. According to the method, quantitative association of the peak locked-rotor torque and the fatigue life is realized, quantitative evaluation from a static index to a dynamic life is realized, a basis is provided for life prediction of the whole robot, and the test precision is improved.

A torque sensor 10 comprises: a stub shaft 86; a first pinion gear 91 through which torque is transmitted to and from the stub shaft 86 via a torsion bar 95; a sensor body 58 fixed to the first pinion gear 91 or the stub shaft 86; a sensor housing 21 that houses the stub shaft 86 and the sensor body 58; and a bearing 70 that rotatably supports the stub shaft 86 with respect to the sensor housing 21. The stub shaft 86 has a guide part 87 having a diameter that is slightly smaller than the diameter of a portion of the stub shaft 86 where the bearing 70 is disposed. The length L1 in the axial direction from a guide end 87a to an end section 58a of the sensor body 58 on a side where the guide part 87 is located is longer than the length L2 in the axial direction from the bearing 70 to an end section 23 of the sensor housing 21.

The application discloses a kind of single blade cutter automatic detection system of shield machine, belong to shield machine cutter technical field.A kind of single blade cutter automatic detection system of shield machine, including rack, the rack is sequentially provided with air-tightness detection module, solid and liquid lubricant adding module, cutter running module, torque detection module, laser welding module, laser coding module and slide table assembly, the cutter body is fixed on the slide table assembly, and slide table assembly controls cutter body moving position.A kind of single blade cutter automatic detection system of shield machine of the application, from air-tightness test to laser coding whole process does not need manual intervention, detection efficiency is improved, slide table assembly is accurately positioned, five big module sequential operation, single piece detection time is shortened, air-tightness detection is with the double-end dynamic sealing of lower end sealing cavity and upper end sealing cavity, sealing is good, detection precision is high;Particularly set conical clamping block, insert bar and clearance hole staggered engagement, adaptive cutter ring diameter.

The invention relates to the technical field of data acquisition, in particular to a road resistance time sequence data analysis method for an intelligent networked automobile test bed. The method comprises the following steps: acquiring an oscillation stationary characteristic value and a response decay time characteristic value of road resistance data; marking a response attenuation time characteristic value of the road resistance data according to a road resistance data difference and an oscillation stationary characteristic value between different road resistance data sequences, and obtaining a target measurement distance between the station test road resistance data in the station test road resistance data sequence and the road test road resistance data in the road test road resistance data sequence; and obtaining a difference evaluation result between the bench test road resistance data sequence and the road test road resistance data sequence according to the target measurement distance. And the accuracy and the credibility of difference or similarity evaluation between the bench test road resistance data and the real road test road resistance data can be improved.

The present invention relates to a drive unit of an electric bicycle, comprising a bearing receptacle which is designed to hold a bearing, wherein the bearing receptacle is designed to be attached directly to a frame interface of the electric bicycle by means of at least one fixing element.

The utility model discloses a coupling centering device, which relates to the technical field of coupling centering equipment and comprises a movable side support, tested equipment, a base, a unilateral clamping bearing box, a connecting coupling flange, a diaphragm coupling and an accompanying test dynamometer. The shaft end of the tested equipment is fixedly provided with a tested coupling flange, and the single-side clamping bearing box is fixedly installed at the upper end of the base. By the adoption of the structure, compared with other alignment modes, by means of the technical scheme, the precision degree of alignment and the operation simplicity of passive alignment clamping and alignment can be better guaranteed by means of the clearance tightness and tolerance stability of the bearing, and the design scheme of the single-side clamping bearing box can be adjusted according to different types of bearings. The coupling structure is also flexibly designed according to different mechanical structure requirements, corresponding effects can be achieved, the coupling structure is disassembled or reassembled for many times, and the position of the bearing at the fixed end has a very effective calibration effect.

This application discloses a torque detection device, comprising: a strain gauge for deforming under torque; a first strain gauge fixed on the strain gauge, the permeability of which varies with the strain applied to it; a circuit board having at least one first planar coil and the same number of second planar coils as the first planar coil; a second strain gauge disposed on the side of the circuit board away from the first strain gauge, and having the same structure and material as the first strain gauge; and a dielectric layer disposed between the circuit board and the second strain gauge; wherein the first planar coil is disposed opposite to the first strain gauge; the second planar coil is disposed opposite to the second strain gauge; and the thickness and dielectric constant of the dielectric layer are set such that the inductance parameter of the second planar coil responds to temperature changes in a manner that matches the inductance parameter of the first planar coil responds to temperature changes.

A weight and torque sensor for an earth-boring drill bit may include a ring structure having a front face, a rear face, an inside surface, and an outside surface. A major axis of the sensor may be parallel to a longitudinal axis of the drill bit when the weight and torque sensor is mounted to the earth-boring drill bit. The sensor may include a weight strain gauge disposed on the inside surface of the ring structure. The weight strain gauge may be at a position on the inside surface of the ring structure that is aligned with, or perpendicular to, the major axis. The sensor may further include a torque strain gauge disposed on the inside surface of the ring structure. The torque strain gauge may be at a position on the inside surface of the ring structure that is offset but not perpendicular to the major axis.

A torque determination system for a driveline of a work vehicle includes a driveline component having a housing, intermeshing torque transmitting components within the housing, and a shaft supporting the transmitting components for rotation about an axis of the shaft. A shaft connected to the housing for relative rotation is configured to transfer an axial thrust load from the transmission component to the housing along an axis of the shaft. The system includes a strain sensor mounted on the housing to sense local strain caused by the axial thrust load and output a corresponding strain value. A control unit equipped with a processing and memory architecture executes logic to receive the strain value, derive a torque value associated with the transmission component based on the strain value, and output the derived torque value for use on the work vehicle.

The utility model discloses a bow wire torque angle measuring device for measuring the size of the torque angle of the bending on the bow wire. The device comprises: an angle measuring scale, a clamp seat and a connecting base; the surface of the clamp seat is provided with a bow wire accommodating groove, one end of the bow wire accommodating groove abuts on the origin of the angle measuring scale, the extension direction of the bow wire accommodating groove is directly opposite to the origin of the angle measuring scale, and the reading is along the direction directly opposite to the angle measuring scale, so that the size of the torque angle on the bow wire can be accurately read. After the corresponding torque is bent, the doctor places the bow wire on the device to read the torque angle, and judges whether the torque of the bow wire is within the preset range through the reading. Therefore, after using the device, the accurate torque angle can be bent on the bow wire, the influence of the error of manual bending on the force expression effect of the bow wire is avoided, the force of the bow wire is more accurate, the correction effect is more delicate, and the treatment period is shortened.