370results about "Machine gearing/transmission testing" patented technology

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

The invention relates to the field of mechanical engineering, discloses a speed reducer multi-field loss balancing method and system based on working condition self-adaptive feedback, and aims to solve the problems of local loss concentration, intensified temperature rise and low energy efficiency caused by neglect of a multi-physical field coupling relation in the prior art. The method comprises the following steps: acquiring mechanical, thermal, fluid and electromagnetic parameters in operation of the speed reducer through a distributed sensor, and generating a standardized working condition state vector; and inputting into a mechanical-thermal-fluid-electromagnetic four-field coupling model, and solving the space-time loss distribution of the key component by combining with a data driving correction term. According to the scheme, refined prediction and closed-loop regulation and control of multi-field loss distribution are achieved, the local temperature difference and energy consumption concentration are remarkably reduced, the energy efficiency of the whole machine is improved by 8%-15%, the service cycle is prolonged, and the method is suitable for a high-end equipment transmission system under the high-dynamic heavy-load working condition.

The invention discloses a detection method of a vehicle transmission system, electronic equipment and a storage medium. The method comprises the steps that in response to a detection instruction for a vehicle transmission system, torques in different directions are applied to a motor in the vehicle transmission system on the basis of preset torque parameters, resolver signal values of the motor in different directions are obtained, and the resolver signal values are used for representing electric signal values output by a rotation position sensor of the motor; the rotation position sensor is used for monitoring position information of a rotor of the motor relative to a stator. Determining a transmission system gap of the motor based on the rotary transformer signal values in different directions; and detecting the vehicle transmission system based on the transmission system clearance to obtain a detection result. The technical problem of low detection accuracy of the vehicle transmission system in the prior art is solved.

The invention discloses an anti-label noise urban rail train gearbox incremental fault diagnosis method, which comprises the following steps of: segmenting and standardizing collected gearbox fault data of an urban rail train bogie according to a preset length to obtain a fault sample; based on the fault sample, constructing a data set which can be used for class incremental learning; constructing a fault diagnosis model, and performing initial training on the fault diagnosis model by using the data set to obtain a fault diagnosis model after initial training; performing incremental training on the fault diagnosis model after the initial training to obtain a trained fault diagnosis model; and performing fault identification on a to-be-detected vibration signal by using the trained fault diagnosis model to obtain a diagnosis result of the gearbox. According to the method, disastrous forgetting and noise interference can be effectively handled, and the accuracy of fault diagnosis of the gearbox of the urban rail train is improved.

The invention provides a return difference measuring method and device of a gear transmission mechanism in a motor driving system. According to the return difference measurement method, the return difference measurement value is indirectly determined by identifying the critical point that the gear transmission mechanism starts to respond to the driving signal, the critical point marks that the gear transmission mechanism completes the change from the idle stroke state to the effective transmission state, and the return difference measurement value is calculated based on the position data before the critical point. The return difference measurement value is a comprehensive index which contains the comprehensive influence of the gear backlash, the elastic deformation of the transmission shaft and the static friction force and reflects the overall transmission performance of the system, so that the return difference measurement value which reflects the overall transmission performance of the system and is real and comprehensive is obtained through measurement according to the technical scheme of the invention. According to the method, the transmission lag characteristic of the system under the actual working condition can be represented more accurately, and a more reliable data basis is provided for subsequent high-precision motion control.

This invention discloses a detection device and method for oil passage blockage in automotive engine transmission covers. A clamping assembly presses the transmission cover firmly against a support platform, connecting the upper port of a first detection channel to the first opening of the oil passage in the transmission cover to be tested, and the upper port of a second detection channel to the second opening of the oil passage in the transmission cover to be tested. A detection bead is placed in either the first or second detection channel. Driven by a flipping platform, the placement of the detection bead is determined by the position of a first and second detector to assess whether the bead can pass through the oil passage, thus determining whether the oil passage is blocked. Compared to the traditional method where inspectors manually insert an endoscope into the oil passage to directly observe its internal condition, this detection device only needs to rely on the results of the first and second detectors to make a judgment, making it more automated and effectively avoiding missed or incorrect detections.

A method for monitoring at least one machine including causing at least a first sensor to acquire at least a first non-stationary signal from at least one machine operating in a non-stationary manner during at least one operational time frame, the at least first sensor providing at least a first non-stationary output, causing at least a second sensor to acquire at least a second non-stationary signal from the at least one machine during the operational time frame, the at least second sensor providing at least a second non-stationary output, fusing the at least first non-stationary output with the at least second non-stationary output to produce a fused output, extracting at least one feature of at least one of the first and second non-stationary signals based on the fused output, analyzing the at least one feature to ascertain a state of health of the at least one machine and performing at least one of a repair operation, maintenance operation and modification of operating parameters of the at least one machine based on the state of health as found by the analyzing.

The utility model provides a test bed for brake torque detection and material running-in, which relates to the technical field of brake detection and brake material test, and comprises a brake system, a detection system and a control system, the brake system comprises a brake wheel, two ends of the brake wheel are rotatably connected with a support shaft, and the brake wheel is rotatably connected with a bracket through two ends of the support shaft; a base is fixed to the bottom of the support, a driving hydraulic cylinder is fixed to the upper end of the base, a force sensor is fixed to the upper end of the driving hydraulic cylinder, a lever is rotationally connected to the upper end of the force sensor, an angle sensor is fixed to the surface of the lever, and the side end of the lever is rotationally connected with the upper end of the support. In combination with an existing advanced data processing algorithm, high-precision detection of the braking torque of the large belt brake can be realized, and the detection precision technology is improved.

The invention provides an aero-engine turbine interstage casing thermal-mechanical coupling loading test device, which comprises a mechanical loading test tool clamp, a temperature field control system and a test assembly, and is characterized in that the test assembly is used for simulating a turbine interstage casing assembly and is installed on the mechanical loading test tool clamp; the mechanical loading test tool clamp is used for composite loading of radial force and axial force of the test assembly. The temperature field control system comprises a cooling system and a heating system, and the cooling system and the heating system enable the test assembly to reach an expected target temperature field by controlling the temperature to adjust the current of the heater and the flow of cold air. The device has the advantages of being simple in structure, flexible to install, high in control precision, easy to operate and the like, and can be used for controlling the deformation discordance of the turbine interstage casing supporting plate and applying the mechanical load of the casing, so that an interstage casing outer ring stress-strain assessment point reaches the working state of an engine, and the working efficiency of the engine is improved. And checking whether the strength design of the inter-stage casing meets the expectation or not.

The utility model discloses a clutch detection tool comprising an installation clamp used for fixing a clutch to be detected, an overturning mechanism which is connected with the installation clamp and can drive the installation clamp to rotate, a driving mechanism, and a limiting mechanism which ensures that the center position of the clutch to be detected does not deviate after overturning. In a standby state, the mounting clamp is kept horizontal; the positioning mechanism is selected according to the model of the clutch to be tested, the clutch is fixed on the mounting fixture and vertically inserted into the mounting fixture, the clamping cylinder performs automatic clamping, quick positioning is facilitated, and the mounting fixture and the turnover mechanism are integrated together, so that the mounting time is shortened; the first limiting block in the limiting part can prevent the overturning mechanism from overturning excessively, and when the overturning mechanism collides with the first limiting block, the first buffer can reduce impact force and cooperate with the concentric bearing on the support, so that the clutch to be detected is prevented from deviating to the maximum extent, follow-up butt joint with the load shaft is ensured, the adjustment time is shortened, and the detection precision is ensured.

The application provides a helicopter transmission test bench safety early warning method, including the following steps: compiling a user customized formula table, the user customized formula table including fault detection conditions, physical channel values and logical channel values; obtaining the customized formula corresponding to the fault detection conditions, physical channel values and logical channel values in the user customized formula table; obtaining the channel address of the customized formula. The application proposes a helicopter transmission test bench alarm method based on multiple detection conditions, wherein the fault detection conditions include conditions such as the rotation speed reaching the lower limit value, the rotor loading device being effective, the tail rotor loading device being effective, the accessory loading device being effective and the like. The alarm method can effectively monitor and alarm the transmission system test piece parameters under the limited conditions, so that the fault positioning is more effective and accurate, and some unnecessary alarm information can be prevented from occurring, so as to avoid unnecessary interference to the test operators.

This invention relates to the field of fault diagnosis of mechanical equipment components, and discloses a method, system, medium, and device for fault diagnosis of wet friction components based on MLLM-PINN. The method includes: acquiring three types of basic data (temperature, vibration, and text) of the wet friction component, preprocessing them, and inputting them into an MLLM multimodal feature fusion model to form a high-dimensional fusion feature containing visual, dynamic, and semantic information; constructing a PINN physical constraint model consisting of five fully connected hidden layers using PINN, inputting the high-dimensional fusion feature into the model to output fault category, physical parameter deviation, and damage degree; using a hybrid loss function to perform cross-model collaborative optimization of the MLLM multimodal feature fusion model and the PINN physical constraint model, and optimizing the model parameters to obtain the trained and optimized MLLM multimodal feature fusion model and PINN physical constraint model; and generating a structured diagnostic report for the wet friction component based on the physical prediction results of PINN and the semantic reasoning capability of a large language model.

The invention discloses a fault diagnosis model modeling method and device, equipment and a storage medium, and the method comprises the steps: determining an interval frequency pair according to the value of signal data in a reference operation detection signal and an interval range, and determining a position set according to the interval range corresponding to the interval frequency pair and the signal data; determining a reference signal subset corresponding to the reference operation detection signal in the interval frequency pair according to the position interval range, and determining a non-reference signal subset corresponding to the non-reference operation detection signal according to data time corresponding to signal data in the reference signal subset; taking the reference signal subset and all the non-reference signal subsets as sub-models corresponding to sample input interval frequency pairs to obtain a model diagnosis result; and determining a model comprehensive diagnosis result according to all the model diagnosis results, determining a single accurate coefficient according to the model diagnosis result output by each sub-model, and adjusting a weight coefficient of the sub-model according to the model comprehensive diagnosis result and the single accurate coefficient of each sub-model to obtain a fault diagnosis model.

The application relates to a fan maintenance technical field, in particular to a fan transmission system fault feature extraction equipment, which comprises a machine body, a winding mechanism is arranged outside the socket, a feature extraction mechanism is arranged inside the winding mechanism, a position adjusting mechanism is arranged at the bottom of the machine body, the position adjusting mechanism comprises a mounting plate, two hand pump type suction cups are mounted on the mounting plate, an adjusting piece is arranged at the top of the mounting plate, and a limiting piece is arranged on one side of the adjusting piece. Through the cooperation of the mounting plate, the hand pump type suction cup, the rotating disc and the first rotating shaft, when the equipment is placed, the hand pump type suction cup is adsorbed on the plane position, the machine body is supported, the machine body is rotated, the rotating disc is driven to rotate, the operating panel of the machine body is aligned with the position of the eyes of the worker, the first rotating shaft and the fixing block are rotated, the machine body is driven to rotate, the position of the operating panel of the machine body is further adjusted, the machine body is flexibly placed, and the worker can conveniently observe the data displayed on the operating panel of the machine body.

This invention discloses a precision testing device for planetary roller screw pairs, including a testing platform with symmetrically mounted fixed plates on its top. A servo motor is fixedly mounted on one side of one of the fixed plates. The device also includes two sets of support rods symmetrically mounted below the two fixed plates, and a positioning assembly positioned between the two fixed plates. The positioning assembly includes two movable frames and limiting components symmetrically positioned on both sides of the two movable frames. This allows for easy switching between different sized positioning plates when dealing with different types of planetary roller screw pairs, facilitating reliable positioning of the nut or screw according to the type of planetary roller screw pair. Furthermore, after switching, when positioning a reverse planetary roller screw pair, multi-point positioning of the screw in the pair can be quickly achieved, facilitating the movement of the screw in the reverse planetary roller screw pair while preventing rotation during screw movement, thus improving testing accuracy.

The invention belongs to the technical field of fault diagnosis, and particularly relates to a gearbox fault twinborn diagnosis method based on a virtual-real coding mapping optimization model, and the method comprises the steps: obtaining envelope spectrums of actual measurement and simulation signals of a gearbox under two different working conditions, and constructing a source domain actual measurement and virtual sample set and a target domain test and virtual sample set; building a virtual-real coding mapping network, and obtaining a virtual-real coding mapping optimization model by adopting a Bayesian optimization algorithm; training the optimization model by utilizing the source domain actual measurement and the virtual sample set until convergence; inputting target domain virtual and actual measurement samples into the trained optimization model, extracting corresponding coding features of the target domain virtual and actual measurement samples, training a k-nearest neighbor (KNN) classifier by adopting the coding features of the target domain virtual samples, inputting test sample features into the trained KNN, and outputting a diagnosis result; according to the method, high accuracy can be achieved in small-sample cross-working-condition gearbox fault diagnosis, and the method has good application prospects in the field of twin data driven gearbox fault diagnosis.

The invention relates to the technical field of transmission gear shifting testing, and discloses a transmission static gear selecting and shifting performance testing device and a testing method thereof.The transmission static gear selecting and shifting performance testing device comprises a gear selecting assembly, a gear shifting assembly, a detecting assembly and an adjusting assembly.The gear selecting assembly comprises a gear selecting mechanical arm and a first motor, and the gear selecting mechanical arm is fixedly connected with a rotating shaft of the first motor in a sleeving mode; the gear shifting assembly comprises a gear shifting mechanical arm and a second motor, the gear shifting mechanical arm comprises two connecting ends, one end of the gear shifting mechanical arm is fixedly connected with a rotating shaft of the second motor in a sleeved mode, and the other end of the gear shifting mechanical arm is fixedly connected with a gear shifting shaft in the transmission in a sleeved mode. The detection assembly comprises a first encoder, a second encoder, a first force sensor and a second force sensor, the first force sensor and the second force sensor are connected with the gear selecting mechanical arm and the gear shifting mechanical arm respectively, and the adjusting assembly comprises two adjusting seats which are connected with the gear selecting mechanical arm and the gear shifting mechanical arm respectively. The static gear selecting and shifting performance testing device is simple in structure, high in adaptability and low in cost, and comprehensive and objective static gear selecting and shifting performance results of the transmission can be obtained.

A transmission characteristic parameter identification method for a ball screw feeding system comprises the following steps: in the normal operation process of the ball screw feeding system, acquiring voltage, current, rotating speed and other signals through a servo motor and a driving system thereof, and realizing online identification of key electromagnetic parameters and mechanical parameters in stages; under the static working condition of the motor, controlled voltage excitation is applied, stator current is measured, and identification of stator winding resistance and stator inductance is completed; under the steady-state operation condition, the flux linkage amplitude of the permanent magnet is calculated based on a q-axis voltage equation; under a dynamic operation condition, a friction torque model is established through segmented constant-speed operation, a rotor motion equation is combined, a recursive least square algorithm with a forgetting factor is introduced, and online identification of the equivalent rotational inertia of the system is realized; according to the method, complete and accurate transmission characteristic parameters can be obtained in the ball screw feeding system, the identification process is stable, the calculation complexity is low, and the method is suitable for being embedded into a servo control system.

The invention discloses a crane operation stability analysis and transmission part fault diagnosis integrated device, relates to a crane detection technology, and can ensure safe and reliable operation of a crane. The invention discloses a crane operation stability analysis and transmission part fault diagnosis integrated device. A big and small vehicle bearing fault diagnosis and operation stability analysis unit is used for extracting fault vibration characteristics; the large and small vehicle track crack defect analysis unit is used for analyzing the vibration mode of the track when the wheel passes through the track to obtain the defect of the wheel track; the hoisting mechanism guide wheel defect and steel wire rope broken wire and loose strand analysis unit is used for collecting and analyzing defect characteristic signals generated when a steel wire rope passes through a guide wheel; and the hoisting machinery transmission key component fault diagnosis and analysis unit is used for realizing extraction and identification of brake fault vibration signal features, extraction and identification of gear box early fault vibration features, fault detection of crane driving motor vibration signal spectrum analysis, and identification of crane key component fault hidden dangers.

The invention relates to the technical field of intelligent diagnosis of mechanical system faults, and particularly discloses a planetary gearbox fault intelligent diagnosis method, which comprises the following steps: S1, collecting a public data set of a planetary gearbox, and dividing the public data set into a training data set and a test data set; s2, industrial white noise filtering processing is carried out on each data set; s3, respectively carrying out normalized dimension removal and decentration processing on each data set; s4, performing kernel principal analysis processing on the data to obtain main features of the fault information; s5, clustering based on a decision tree is established, information of the same fault category is classified into one category according to the Euclidean distance, and a center distance is selected; the center distances of different types of fault information are classified again, and different types of fault information with similar Euclidean distances are clustered into pseudo classes; and S6, repeating the steps S2 to S5 on unknown fault information, and performing KNN classification on the unknown fault information and the pseudo class to realize fault information discrimination of the pseudo class. According to the method, the number of traversal steps can be reduced to the maximum extent, and planetary gearbox fault diagnosis can be rapidly and effectively achieved.

The application discloses a kind of gas turbine fault diagnosis system and control method based on multiple sensors, specifically relates to gas turbine fault diagnosis field, including data acquisition module, data analysis module, data comprehensive evaluation module and real-time feedback module;Data analysis module: including mechanical operating condition data analysis unit and thermodynamic state data analysis unit, for the data collected are analyzed, and the analysis result is transmitted to data comprehensive evaluation module;Data comprehensive evaluation module: including gas turbine fault diagnosis data analysis unit, for the analysis result transmitted by data analysis module is comprehensively evaluated, and the evaluation result is transmitted to real-time feedback module;The application is reduced by multidimensional data acquisition, the bottleneck of traditional fault diagnosis dependence single monitoring index, and data foundation is built for accurate fault location and analysis.

The invention relates to the field of agricultural machinery, and discloses a soil environment improving device for tobacco planting, the device comprises a rotary cultivator and an advancing speed self-adaptive regulation and control system, the system obtains a rotary blade shaft torque, an engine load rate and a slip rate in real time to calculate a load coefficient; acquiring the ground gradient, the soil moisture content and the ground surface flatness to calculate an environment coefficient; calculating a collaboration coefficient according to the actual tilling depth and the soil crushing rate under the current load coefficient and the environment coefficient; acquiring rack vibration acceleration, gear box oil temperature and power output shaft rotating speed fluctuation to calculate a health coefficient; and finally, calculating a target traveling speed based on the reference speed, the collaboration coefficient, the health coefficient and the fuel consumption per unit area, and performing real-time adjustment. Through multi-source information fusion and self-adaptive speed regulation, complex field working conditions can be dynamically matched, the operation quality is improved, the machine tool health is guaranteed, the energy consumption is reduced, and the agricultural requirement of tobacco precision planting for soil environment improvement is met.

The invention discloses a speed reducer production test test method and system, and relates to the field of speed reducer performance test. The method is applied to a speed reducer testing system, and comprises the following steps: obtaining a to-be-tested parameter type and a customized working condition of a to-be-tested speed reducer; performing parameter error traceability analysis on the to-be-tested parameter type to obtain various error sources of the to-be-tested parameter type; performing error testing on the to-be-tested speed reducer under a preset orthogonal working condition to obtain an error contribution degree sequence of the to-be-tested speed reducer; testing the to-be-tested parameter type of the to-be-tested speed reducer under the customized working condition to obtain test data of the to-be-tested speed reducer; based on the error contribution degree sequence of the to-be-tested speed reducer, correcting the test data of the to-be-tested speed reducer to obtain corrected test data of the to-be-tested speed reducer; and judging and outputting a test result of the to-be-tested parameter type based on the corrected test data of the to-be-tested speed reducer. Therefore, the qualification test reliability of the miniature speed reducer at present is improved.

A receiving system (9) for a device for receiving a unit is shown and described, wherein the unit is rotatably mounted about an axis of rotation (5) on a frame (7) of the device in a received state, wherein a second connecting section (23) of a second receiving unit (13) has a contact surface (43) that is at least partially circumferential and radially outwardly extending, which is designed such that, in a connected state, it forms an interference fit with a contact surface (45) of a second connecting section (17) of a first receiving unit (11) that is at least partially circumferential and radially inwardly extending, such that at least a section of the second connecting section (17) of the first receiving unit (11) is deformed radially outwardly,that a contact surface (33) of the second connecting section (17) of the first receiving unit (11), which is at least partially circumferential and radially outwardly directed, and a contact surface of a section of the device, which is at least partially circumferential and radially inwardly directed, are force-fit together. Furthermore, a first receiving unit (11), a second receiving unit (13), and a device are shown and described.

The application relates to a planetary roller screw pair wear state evaluation method, device, equipment and medium. The method comprises the following steps: collecting a vibration signal in a high-speed running process of a planetary roller screw, performing frequency domain conversion processing on the vibration signal, extracting a frequency spectrum characteristic parameter, and determining frequency spectrum characteristic data; judging the frequency spectrum characteristic data based on a preset threshold value, determining that the vibration is abnormal if the threshold value is exceeded, extracting an abnormal frequency band parameter, and generating a vibration abnormality characteristic vector; inputting the characteristic vector into a trained convolutional neural network, combining a U-Net network segmentation technology, determining a damage position of a thread engagement area, calculating a pixel density difference of a damage area, and obtaining a quantitative value of a wear degree; based on the quantitative value, combining a standard three-dimensional model, accurately evaluating a wear state, and generating a state data set containing wear information. The method can realize accurate evaluation of the wear state of the planetary roller screw, and adapt to the actual needs of high-end equipment for transmission component state monitoring.

This invention discloses a six-degree-of-freedom motion error measurement system and method for a rotating axis. The system includes a rotating axis and angular position error measurement components and tilt motion and radial runout error measurement components respectively connected to the rotating axis. The tilt motion and radial runout error measurement components include a first laser optical path and also include an axial runout error measurement component, which is integrated into the first laser optical path. The six-degree-of-freedom motion error measurement system of this invention has a simple structure, occupies little space, and is easy to operate. It can accurately measure two tilt motion errors, two radial runout errors, angular positioning errors, and axial runout errors.

The invention relates to the technical field of strip mill fault detection, in particular to a strip mill transmission shaft fault early warning method and system based on digital twinning. The method comprises the following steps: deploying multiple types of sensors at key parts of a transmission shaft of a strip mill, collecting real-time operation data, and performing time domain and frequency domain extraction on the operation data to obtain effective fault features; establishing a multi-dimensional evaluation index system, and dynamically adjusting fault priorities according to effective fault features; a grading standard is formulated according to the severity of the fault, an early warning threshold value of each grade is set, and fault early warning is carried out according to the corresponding grade; the system comprises a current data acquisition and feature extraction module, a fault condition priority dynamic adjustment module and a fault grading early warning module. By means of the mode, the fault priority is dynamically adjusted, operation and maintenance resource waste and production risk out-of-control are avoided, the accuracy and timeliness of transmission shaft fault early warning are improved, and the continuity and stability of strip steel production are guaranteed.

The application discloses an independent loading detection device of centrifuge differential mechanism, which comprises a base, a driven motor, a rotating motor, test differential mechanisms, a rotating shaft, a loading shaft, a loading motor and a supporting bearing, the driven motor, the rotating motor and the loading motor are installed on the base, the driven motor drives the test differential mechanism at the near end, the rotating motor also drives the test differential mechanism at the near end through a belt transmission, the output end of the test differential mechanism is the loading shaft, the other end of the loading shaft is connected with the test differential mechanism at the far end, the test differential mechanism at the far end is loaded by the loading motor, the rotating shaft is connected between the two test differential mechanisms, the rotating shaft is installed on the supporting bearing at both ends, and the supporting bearing is installed on the base. The two differential mechanisms of the same type are used as the load of each other, compared with the traditional open test, the installed power of the main motor is greatly reduced, the energy is recycled internally, and energy saving and high efficiency are achieved.

This invention relates to the field of crankshaft inspection technology, and more particularly to an inspection device and method for high-precision crankshafts. The inspection device includes: a mounting mechanism, a drive mechanism, and at least two inspection mechanisms. The mounting mechanism is installed at the center of the spindle end face of a grinding machine headstock. The drive mechanism is installed on the grinding machine headstock. The high-precision crankshaft to be inspected is located within the drive mechanism and abuts against the inspection mechanisms. The drive mechanism drives the inspection mechanisms to move along the Y-axis direction for the inspection of the high-precision crankshaft. This invention simplifies the inspection steps of high-precision crankshafts through online inspection, thereby improving the inspection efficiency. Furthermore, online inspection eliminates the need to disassemble the high-precision crankshaft, further improving inspection efficiency. Simultaneously, the use of two or more inspection mechanisms allows for the simultaneous inspection of the outer diameter and eccentricity of the high-precision crankshaft, further enhancing the inspection efficiency.

The measurement and evaluation of backlash caused by wear and tear are performed during the operation of the equipment to improve the equipment's operating rate. [Solution] The present invention comprises an electric motor 22 that drives a small gear 24, an operation control device 21 that controls the electric motor 22, and a backlash measuring device 43 that measures the backlash that occurs between a large gear 25 and a small gear 24. The backlash measuring device 43 consists of an angle torque measuring unit 13 that measures the rotation angle and torque of the electric motor 22 based on data obtained from an input shaft angle sensor 12 that acquires data on the rotation angle of the electric motor 22 and data obtained from the operation control device 21, a data selection unit 14 that selects data on the rotation angle and torque of the electric motor 22 during operation from the angle torque measuring unit 13, and a backlash evaluation unit 15 that calculates a measured value of the backlash that occurs between the large gear 25 and the small gear 24 based on the data selected by the data selection unit 14.