465results about "Force sensors" patented technology

The invention discloses a high-temperature torque testing system based on adaptive PID control, and relates to the field of rotary valve pulser torque testing, the system comprises a loading mechanism, a heating mechanism, an electro-hydraulic servo valve, a torque sensor signal converter, an incremental rotary encoder, an adaptive PID controller and a pulse signal acquisition analyzer; the loading mechanism is used for applying torque to the rotary valve pulser according to a preset reference loading waveform under the condition that the rotary valve pulser is detected to reach the calibration test temperature; the self-adaptive PID controller is used for dynamically adjusting PID parameters according to the monitoring data by adopting a self-adaptive PID algorithm and calculating corresponding driving correction information; the electro-hydraulic servo valve is used for updating the applied torque of the rotary valve pulser according to the driving correction information; and the pulse signal acquisition analyzer is used for testing whether the rotary valve pulser has an electrical fault or not according to the acquired electrical pulse signal. Therefore, the high-temperature working condition can be accurately simulated, and accurate torque test and electrical signal analysis can be carried out.

The invention relates to a calibration method of a vehicle transmission assembly, in particular to a transmission shaft calibration rack and a transmission shaft torque test method in the whole vehicle operation process, and aims to solve the problem that an existing transmission calibration method cannot meet the torque test requirements of a whole vehicle under various complex operation conditions. The output torque strength of the transmission shaft cannot be accurately obtained, and the problems of whole vehicle NVH and strength are difficult to solve. The method comprises the following steps: 1) installing a transmission shaft to be calibrated; (2) torque is loaded to the driving motor and the load motor; 3) calibrating to obtain ri and ui; 4) obtaining a single calibration process ri-alpha i-Si corresponding relation; 5) obtaining a three-dimensional calibration data set; 6) obtaining a plurality of three-dimensional calibration data sets, and sorting to obtain a four-dimensional calibration data set; (7) the calibrated transmission shaft is assembled to the vehicle; and 8) calculating the output torque Tx of the transmission shaft at any moment. According to the method, forward and reverse torque loading is performed by using the driving motor and the load motor, and the calibration precision is high.

The invention discloses a torsion test method based on a Kalman filtering algorithm, and relates to the technical field of torsion test.According to the torsion test method, a dynamic noise model and a material feature library are combined to enable a filter to automatically adapt to acoustic characteristics of different substrates, and the problem of misjudgment caused by fluctuation of material parameters in a traditional method is solved; secondly, a sub-band processing mechanism can restrain high-frequency noise and meanwhile completely reserve transient characteristics before the material is broken, and effective signal loss is avoided; the transfer learning model eliminates batch differences through adversarial training, and the generalization ability of dynamic threshold judgment is ensured; the real-time compensation strategy generates a refastening scheme considering both mechanical safety and assembly precision in emergency.

The invention discloses an instantaneous torque measuring system and method based on the front end of an engine, and relates to the technical field of engine testing and signal processing, and the system comprises a signal acquisition module, a noise analysis module, a signal processing module and a signal processing module, the noise frequency distribution and noise amplitude range extraction module is used for extracting noise frequency distribution and a noise amplitude range from the smoothed torque data and determining filtered torque data containing low-frequency drift noise and periodic interference signals, and the parameter extraction module is used for analyzing the noise frequency distribution and the periodic interference signals by adopting fast Fourier transform according to the filtered torque data so as to obtain the low-frequency drift noise and the periodic interference signals. Acquiring noise duration time and a noise source identifier, and determining an amplitude compensation coefficient and a frequency suppression parameter; according to the instantaneous torque measuring system and method based on the engine front end, accurate acquisition and noise suppression of engine torque signals are achieved, the accuracy and reliability of torque data are improved, and effective support is provided for engine performance monitoring and fault diagnosis.

The invention discloses a gap-controllable retainer and a frictional resistance measuring method thereof, belongs to the technical field of mechanical equipment manufacturing, and solves the problem that an existing device can only test a retainer with a fixed gap and cannot simulate the influence of dynamic gap change on bearing performance. The retainer capable of controlling the gap comprises a retainer body capable of adjusting the gap between the retainer body and a rolling body, a retainer moving assembly and a gap adjusting part. The gap adjusting part comprises an adjusting motor, an eccentric wheel and a motor fixing frame. According to the retainer capable of controlling the gap, the gap between the retainer and a rolling body can be dynamically adjusted, the retainer can be matched with different types of ball-disc testing machines (rotary type and linear contact type) for friction resistance measurement, the gap between the rolling body and a pocket of the retainer can be flexibly adjusted by adjusting the motor and the eccentric wheel, and the friction resistance of the rolling body is measured. And therefore, the retainer main body can meet the retaining and limiting requirements of different working conditions and different types of bearings, and the performance, the service life and the reliability of the bearings are remarkably improved.

The invention provides an adjustable automobile air conditioner knob detection mechanism, and the mechanism comprises a mounting plate frame, a torsion sensor is fixedly connected with the upper surface of a clamping drive assembly, the clamping drive assembly is connected with a clamping jaw assembly, and the clamping jaw assembly is connected with a clamping jaw. The clamping jaw assembly is used for clamping the automobile air conditioner knob, and the torsion sensor is used for detecting torsion during rotation; the clamping jaw assembly is provided with a deformable contact part, and the contact part is used for automatically deforming when making contact with the outer wall of the knob. Through the arrangement of the concentricity self-checking assembly, the concentricity can be detected while the torsion is detected, so that the problem that the detection error is too large due to poor concentricity can be effectively avoided, and through the arrangement of the clamping jaw assembly, the concentricity can be detected at the same time. Adjustment can be carried out so as to compensate deformation protrusions or recesses on the arc-shaped outer wall of the rotary knob when clamping is carried out.

The invention discloses a downhole casing pipe external windowing experiment device and method, and belongs to the technical field of downhole casing pipe windowing, the downhole casing pipe external windowing experiment device comprises an experiment bench, an angle control mechanism, a drilling mechanism and a drill column mechanism, the angle control mechanism is arranged on the experiment bench and used for adjusting the position of a casing pipe, and the drilling mechanism is arranged on the experiment bench and used for controlling the drilling mechanism; a first driving assembly of the drilling mechanism is used for driving a working plate to move in the direction close to the outer wall of the casing pipe, and a first pressure sensor is used for detecting thrust of the first driving assembly. A first servo motor of the drill string mechanism can drive a drill rod to drive a milling shoe to rotate so as to open a window from the outer wall of the casing pipe, a torque sensor is arranged between an output shaft of the first servo motor and the drill rod and used for detecting the cutting torque of the milling shoe, and a second pressure sensor is arranged on a working plate and used for detecting the cutting pressure of the milling shoe on the casing pipe. The underground casing pipe external windowing experiment method adopts the underground casing pipe external windowing experiment device. According to the method, data support is provided for an actual casing pipe external windowing process, and the windowing quality is improved.

The invention relates to the technical field of dynamic balance testing, and discloses a steering drive axle torque detection testing device which comprises a base, a first motor is fixedly connected to the outer wall of the base, a supporting table is fixedly connected to the surface of the base, a hydraulic cylinder is fixedly connected to the top of the supporting table, and a second motor is fixedly connected to the inner wall of the supporting table. The output end of the second motor is fixedly connected with a detection block, a limiting mechanism is arranged in the supporting table, a positioning groove is formed in the inner wall of the supporting table, a bridge body is placed in the positioning groove, and the detection block is connected with the detection end of the bridge body in a sleeved mode. The drive axle is limited through the anti-deviation mechanism, the drive axle is prevented from deviating due to vibration in the dynamic torque test process, the torque test result is prevented from being affected, the stability of measured data in the torque test process is improved, and the test data can more accurately reflect the real torque performance condition of the drive axle.

The invention provides a joint torque sensor and a robot. The joint torque sensor comprises at least two strain beams and a strain gauge, wherein each strain beam comprises a first mounting surface and a second mounting surface which are oppositely arranged; strain gauges are mounted on each first mounting surface and each second mounting surface; the plane where each first installation face and each second installation face are located intersects with the direction of torque. Wherein the strain gauge comprises at least one strain gauge, the joint torque sensor further comprises a bridge formed by connecting the strain gauges, and a bridge arm of the bridge at least comprises the strain gauges which are correspondingly arranged on a first mounting surface and a second mounting surface on the same strain beam and are arranged in series. The joint torque sensor provided by the invention can improve the detection precision.

One embodiment described herein is a mast torque sensor system for a rotorcraft that includes a rotor shaft bearing strain sensor. In some embodiments, a mast torque sensor system is configured to calculate a rotor mast torque using rotor shaft bearing strain information. In one embodiment herein, the rotor shaft bearing strain sensor includes a fiber optic strain sensor.

The present invention relates to a thrust and torque measuring device for a model test of a ship. The purpose of the present invention is to provide a self-propelled dynamometer in the prior art in which a thrush and a torque generated on a single rotating shaft connected to a propeller are measured at the same time, resulting in an interference effect occurring between the thrush and the torque, and to provide a self-propelled dynamometer in which the thrush and the torque are measured at the same time, and to provide a self-propelled dynamometer in which the thrush and the torque are measured at the same time, and to provide a self-propelled dynamometer in which the thrush and the torque are measured at the same time. A thrust bearing for rotating while transmitting thrust applied to a shaft to a force cell and a coupling for determining whether or not the alignment state between shafts is abnormal are disposed between the force cell for thrust measurement and the force cell for torque measurement. The interference amount between thrust and torque data is corrected through a data processing board, and whether the shaft alignment state is abnormal or not is judged, so that the interference amount generated when thrust and torque are measured is corrected in a data post-processing mode, and the influence caused by the interference effect is reduced to the maximum extent. Therefore, the thrust and torque measuring device for ship model testing using data post-processing can improve the accuracy and precision of simultaneous measurement of thrust and torque.

The invention discloses an automatic measuring device and measuring method for dynamic and static friction torques of medium and large-sized bearings, and belongs to the technical field of bearing detection.The device comprises a bearing assembly, a moving plate is arranged on the bearing assembly, a rotating motor is connected to the bottom of the bearing assembly, and a driving shaft system is arranged on an output shaft of the rotating motor; the top end of the driving shaft system is provided with an inner ring fixing mandrel, the upper surface of the moving plate is connected with a torque sensor through an upper fixing frame, the bottom end of the torque sensor is provided with a measuring shaft system, the bottom end of the measuring shaft system is sleeved with a center adjusting assembly through two guide columns, the bottom of the center adjusting assembly is provided with an outer ring loading tool, and the outer ring loading tool is provided with an inner ring. Under the cooperation of the structure, not only can the dynamic friction torque be measured, but also the multi-point static friction torque can be automatically measured, more comprehensive bearing friction characteristic data are provided, and optimization of bearing design and model selection is facilitated.

The invention discloses a torque sensor and an implementation method thereof, the torque sensor comprises a composite elastomer and a sensing strain gauge, the composite elastomer comprises an outer fixing ring, an inner fixing ring, a spoke strain beam and a Y-shaped strain beam, the outer fixing ring and the inner fixing ring are of a concentric ring structure, the spoke strain beam is radially connected with the outer fixing ring and the inner fixing ring, and the Y-shaped strain beam is connected with the outer fixing ring and the inner fixing ring. The Y-shaped strain beams are arranged between the adjacent spoke strain beams, and the sensing strain gauges are printed on the Y-shaped strain beams and are connected to form a Wheatstone bridge. The anti-interference capability of the torque sensor can be improved, and the torque sensor can be widely applied to the technical field of sensors.

The invention discloses a multi-machine-head optical lens pressing ring locking device and a using method, the locking device comprises a power output part and a plurality of jig rotating platforms matched with the driving end of the power output part, and the rotating end of each jig rotating platform is fixedly provided with a pressing ring jig used for clamping a pressing ring to lock the optical lens pressing ring. The rotating end of the jig rotating platform is driven to rotate through the power output part, the pressing ring jig and the clamped pressing ring are driven to rotate synchronously, and the pressing ring is locked; each jig rotating platform is connected with the driving end of the power output part through a rotating shaft assembly, the rotating shaft assembly has the freedom degree of stretching and retracting in the axial direction, in the pressing ring locking process, the locking device does not need to be overall lifted, operation loads are reduced, and therefore the operation difficulty is reduced, and the working efficiency is improved. And the accurate control on the axial movement stroke of the lock attachment is ensured.

The invention discloses a motor testing device and a calibration method, a testing method and equipment thereof, and relates to the technical field of motor performance tests.A control assembly of the motor testing device is in communication connection with a torsion calibration device under the conditions that the motor testing device is in communication connection with the torsion calibration device, and a test calibration end is in transmission connection with the torsion calibration device; controlling the torque calibration device to output torque to the test calibration end, acquiring a torque value detected by the torque detection piece when the output torque of the torque calibration device reaches target calibration torque, and calibrating the torque detection piece according to a difference value between the detected torque value and the target calibration torque; under the condition that the motor testing device is electrically connected with the to-be-tested motor and the testing calibration end is in transmission connection with the to-be-tested motor, the controllable load part is controlled to output preset load torque to the torsion shaft and output preset electrical parameters to the to-be-tested motor, and torques detected by the torque detection part under different preset electrical parameters are obtained; according to the invention, the precision of motor small torque testing can be improved.

The invention relates to the technical field of vehicle-mounted screens, in particular to a screen rotating shaft torque anomaly detection method, device and equipment and a storage medium. Stress data of rotating shafts on the two sides of a vehicle-mounted screen and phase data of a driving motor are obtained, the torque deviation on the two sides and the change trend of the torque deviation are determined, and the torque anomaly is detected according to the change trend and the accumulated deviation total amount. And determining a grading result of the torque deviation of the two sides of the rotating shaft, and activating emergency retracement control when the stress overload risk is triggered. And calculating a motor phase compensation amount based on a deviation grading result and calibrating a motor phase to realize rotating shaft torque balance adjustment. According to the scheme, the torque deviation and the change trend are accurately quantified through stress distribution data and multi-dimensional analysis, deviation grading is achieved, the phase of the motor is dynamically adjusted according to the grading result, mechanical aging and load change in long-term use are adapted through historical compensation records and amplitude limiting intervals, the limitation of a traditional method is effectively solved, and the reliability of the motor is improved. The service life of the rotating shaft is prolonged and the use experience of the vehicle-mounted screen is optimized.

The invention relates to the technical field of vibration monitoring, in particular to a rotating machine vibration protection method and system based on particle swarm optimization, and the method comprises the steps: obtaining a corrected load torque based on a polynomial fitting temperature compensation algorithm in combination with a real-time environment temperature and a sensor output voltage, and synchronously calculating an actually measured vibration amplitude; configuring the number of variational mode decomposition layers according to the real-time rotating speed of the rotor to obtain a preprocessed vibration signal, adjusting the number of independent component analysis iterations according to the load torque, separating the preprocessed vibration signal to obtain independent vibration components, and generating a feature vector; calibrating adaptive resonance theory network parameters based on a particle swarm optimization algorithm, obtaining a normalized feature vector, calculating the similarity with a fault feature template, outputting a diagnosis result, calculating the deviation between an actually measured vibration amplitude and a normal vibration threshold, and performing compensation according to the diagnosis result and the deviation. According to the scheme, the fault diagnosis accuracy of the rotary mechanical vibration protection system is effectively improved through multi-working-condition self-adaptive diagnosis.

The invention discloses a permanent magnet brake torque load curve detection platform, and relates to the technical field of permanent magnet brake torque detection. The detection platform comprises a bottom plate, two sets of supports are sequentially arranged on the bottom plate, a transmission shaft is rotationally installed on the two sets of supports through bearings, one end of the transmission shaft is connected with a servo motor, a brake is installed at the other end of the transmission shaft, a cam is arranged on the transmission shaft, and a reciprocating plate is installed on the outer side of the cam. A heating cover is installed on the outer side of the reciprocating plate, a clamp is installed on one side of the brake, and an air blowing cover is installed on the outer side of the brake. The cam, the reciprocating plate and the heating cover are matched to convey high-temperature or low-temperature air into the air blowing cover, the clamp positions the brake, and the air blowing cover sprays the low-temperature air or the high-temperature air onto the brake, so that the temperature of the brake is rapidly increased or decreased, different detection environments are simulated, and the detection precision is improved.

The invention relates to a watertight differential tension and pressure sensor of a composite structure and a working method thereof, and belongs to the field of sensors, the watertight differential tension and pressure sensor comprises a force sensor on the outer side, a pressure sensor on the inner side and a watertight cable, the pressure sensor on the inner side is used for measuring water pressure, oil pressure and air pressure, and the force sensor on the outer side is used for measuring tension and pressure; the pressure sensor is embedded in the force sensor, and the contact part is sealed by welding; the pressure sensor and the force sensor are both connected with a positive wire and a negative wire, and the four wires lead out signals through a watertight cable. A brand-new core structure is adopted, the sealing performance is good, the pressure sensor and force sensor structures are arranged at the same time, the device can adapt to multiple scenes, a differential structure is adopted, and interference of the external environment is reduced.

The present invention provides a contactless torque sensor, comprising a swept-frequency laser light source, an optical fiber coupler, a first signal detection arm, a second signal detection arm, a first channel reference arm, a second channel reference arm, a first signal reference mirror, a second signal reference mirror and a signal acquisition system; the first signal reference mirror is connected to the first channel reference arm, and the second signal reference mirror is connected to the second channel reference arm; the optical path difference of light at two positions on the measured object is obtained by the first signal detection arm and the second signal detection arm, which is obtained by the signal acquisition system after coupling by the optical fiber coupler, converted into radial displacement of two positions of the shaft end face, and then converted into corresponding torque angle change after being processed by a signal processing algorithm, so as to measure the change of torque; the technical solution avoids the disadvantage of response lag brought by resistance strain type and other physical principles, effectively reduces the creep, advance and return difference, zero drift and hysteresis of the sensor, and has the characteristics of fast response.

The invention provides a torque measuring device adopting a plurality of force sensors with different ranges for in-situ measurement. The torque measuring device comprises a lever supporting seat, a lever, a balance driving mechanism and a lever force applying mechanism. A lever force applying mechanism at the end part of the lever adopts a plurality of force sensors with different measuring ranges and an elastic device which are sequentially connected in series, when the force sensor with a smaller force value reaches the upper limit of the measuring range, an upper beam of a first pull frame is in contact with a corresponding limiting stop block, and then the force value applied is measured through the force sensor with a larger force value at the next stage; the torque measuring range of the torque measuring device is expanded, the measured values of different measuring range sections are measured through the high-precision force sensors of the corresponding measuring range sections, and the measuring precision is ensured. The force sensor module is arranged above the cutter bearing module in an overhead mode, it is ensured that the linear contact position of lever end stress application is kept constant, the stability of a lever force arm value is ensured, and the accuracy of a torque standard value is improved.

Examples include a functionalized compressible nonwoven material (CNM) cushion with a three-dimensional (3D) pressure-varying electrical conductance (PVEC) region. Integrated with the PVEC surface area is a conductive ink printed on thermoplastic film (CPT) single-sided conductance measurement coupling. The CPT single-sided conductance measurement coupling includes, on the thermoplastic film, N pairs of contact pads and N pairs of pad connection traces. The N pairs of contact pads are maintained, by thermoplastic adhesion, in direct electrical contact with the PVEC surface areas. The N pairs of connection traces extend from the N pairs of contact pads to trace terminals. A conductance measuring circuit selectively applies, via the N pairs of connection traces, voltage and a path to ground to the pairs of contact pads, and measures the resulting current.

A bearing includes a first ring and a second ring capable of rotating concentrically relative to one another and a system for determining wear of the bearing in a machine. The system for determining wear includes identifying means for identifying a set of parameters of the machine acting on the load applied on the bearing, measuring means, conditioning means, determining means, first determining means, second determining means, and third determining means for determining the state of wear of the bearing according to the value of the representative parameter.

The invention relates to the technical field of bearing detection equipment, in particular to a multi-field coupling loading under-ring lubrication bearing friction torque measurement test bench and a detection method, the test bench comprises a mounting base, a support unit, a transmission unit, a loading unit and a detection unit, the support unit, the transmission unit and the detection unit are all connected with the mounting base, and the loading unit is connected with the loading unit. The loading unit is connected with the detection unit, a main shaft of the supporting unit is divided into a detection section, a supporting section and a driving section, the detection section is connected with a detection bearing seat and a to-be-detected bearing set on the detection unit, the top of the detection bearing seat is connected with the sensor assembly, and a conductive mounting hole and a resistance wire mounting hole are formed in the detection bearing seat. By the adoption of the structure, the friction torque of the to-be-detected bearing pack can be measured under force-electricity-heat multi-field coupling loading, meanwhile, under-ring lubrication is carried out on the to-be-detected bearing pack, and high-precision measurement of the bearing friction torque integrating multiple factors is achieved.

The invention relates to the related technical field of bolt detection, in particular to an intelligent detection method and system for residual torque of a bolt, and the method comprises the steps: positioning the head of the bolt, introducing model information to make a map, dividing detection partitions, determining a detection sequence according to a request, associating a wrench driving head, inserting a switching node, and carrying out segmented synchronous detection. The technical problems that the importance degree difference of bolts at different positions in equipment operation is difficult to distinguish, the looseness of the bolts at key positions cannot be detected in time, the switching of driving heads is frequent, and the detection efficiency of the residual torque of the bolts is low are solved, and the detection efficiency of the residual torque of the bolts is low through bolt distribution map partitioning, detection priority evaluation and driving head switching path optimization. The bolt distribution map is associated and matched with the wrench driving head, the driving head switching node is inserted into the detection sequence, the detection segments are divided according to the type of the driving head, the invalid switching of the driving head is reduced, the automatic planning of the detection sequence is realized, the detection coverage rate of the bolt at the core part is ensured, and the detection efficiency of the residual torque of the bolt is improved.

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.

The invention discloses a wear detection method and system for a drill bit based on stone drilling, and relates to the technical field of wear detection methods, a torque curve graph of the drill bit is determined based on the rotation torque of the drill bit, and a corresponding wear image is marked in a torque node in the torque curve graph; multiple curve graphs of the drill bit are determined according to the drilling curve graphs and the corresponding wear images, a drilling data set of the drill bit is determined according to recognition of the multiple curve graphs, the sub-wear condition of the drill bit is determined, and the sub-wear condition of the drill bit is further accurately controlled. The form of each functional part is determined based on the form of the drill bit, the wear form graph of the drill bit is determined according to the form of each functional part and each sub-wear condition, and the wear grade of each functional part is determined according to recognition of the wear form graph, so that the accuracy of the wear form graph of the drill bit is improved, and the wear detection accuracy of the drill bit is improved.

The invention provides an abnormal vibration detection method and device, electronic equipment and a storage medium. The method comprises the following steps: extracting a high-frequency vibration signal from a motor torque signal; detecting the number of sampling points and a peak-to-peak value of the high-frequency vibration signal in a vibration period as a target number of sampling points and a target peak-to-peak value; when the number of the target sampling points meets a first preset condition or the target peak-to-peak value meets a second preset condition, automatically adding an alarm count value; and outputting an abnormal vibration result in response to the condition that the alarm count value is greater than a preset alarm threshold value. Therefore, by analyzing the waveform frequency and the peak value of the motor torque signal in real time, anomaly detection is carried out, and an abnormal vibration result can be rapidly output. According to the method, windowing calculation is not needed, and the method has high real-time performance and low calculation amount.

The present invention relates to a harmonic reducer having a load measuring unit, comprising: a wave generator having a cam plate portion having a wave surface; a flex bearing into which the cam plate portion of the wave generator is fitted and coupled; a flex spline provided outside the flex bearing and having an annular boss portion; a circular spline provided outside the flex spline and having an internal gear meshing with an external gear of the flex spline; a first body coupled to the circular spline; and a second body rotatably provided on the first body by means of a support bearing, wherein the boss portion is coupled to the second body by a plurality of second coupling bolts, and the harmonic reducer further comprises a load measuring unit coupled together by fastening of the second coupling bolts, and the load measuring unit includes a ring-shaped load sensing sensor, and the second coupling bolts are fastened by passing through the load sensing sensor.