249 results about "Body vibration" patented technology

The invention relates to an intelligent monitoring alarm method and system for a motor controller, and the method comprises the steps: obtaining an internal circuit signal and a body vibration signal of the motor controller, carrying out the combined noise analysis, and generating a dynamic noise baseline; performing component fault identification based on the dynamic noise baseline and the internal circuit signal to obtain a fault precursor current feature; performing component impact response separation based on the dynamic noise baseline and the body vibration signal to obtain hidden fault vibration characteristics; performing component association mapping on the fault precursor current feature and the hidden fault vibration feature to obtain an internal fault component identifier; and performing alarm analysis based on the fault component identifier, the fault precursor current feature and the hidden fault vibration feature to obtain a graded alarm decision. According to the invention, early fault features can be captured more sensitively, and false alarms and missing alarms are reduced.

The invention discloses a loss tuning method of a power transformer, which is applied to a transformer body sleeved with a winding and comprises the following steps: applying scanning current excitation containing fundamental waves and harmonic waves to the winding, synchronously acquiring a body vibration signal and converting the body vibration signal into a frequency spectrum; extracting a formant from the frequency spectrum, matching the formant with a theoretical electromagnetic force wave and a structure inherent frequency library, and identifying a coupling formant to be optimized; aiming at each formant, installing a vibration exciter in a corresponding area, sending out an anti-phase periodic pulse force, and dynamically and finely adjusting a pulse force parameter by monitoring a vibration response in real time and taking equivalent mechanical impedance minimization as a target; when the optimal damping state is achieved, the vibration exciter output rod is locked, and static pre-tightening force is formed; and after all formants are adjusted and optimized in sequence and the prestress is locked, final pressing and fixing of the transformer body are completed in the state that the pretightening force is kept. According to the invention, the dynamic loss source of the individual transformer can be actively inhibited and cured before assembly and curing, the operation loss and noise are effectively reduced, and the structural stability is improved.

A concrete mortar mixing and stirring system belongs to the technical field of concrete production equipment. Aiming at the problems that an existing stirring system is difficult to accurately judge the mixing uniformity of concrete mortar and the quality is easily influenced due to excessive stirring or insufficient stirring, the system comprises a stirring tank, a vibration signal acquisition unit, a torque monitoring unit and a control unit, stirring blades in a stirring tank are driven by a motor, a vibration signal acquisition unit captures a tank body vibration signal, a torque monitoring unit detects the torque change of the motor, and a control unit decomposes the tank body vibration signal into a frequency domain signal and extracts a preset aggregate collision vibration frequency band energy value to generate a vibration energy sequence; and analyzing the torque change fluctuation intensity to generate a torque variation coefficient sequence, calculating a correlation coefficient sequence of the two, generating an adaptive shutdown threshold by a sliding time window, and cutting off a motor power supply when the correlation coefficient sequence is continuously lower than the threshold for a preset number of times. The device is mainly used for automatic stirring control of concrete mortar, and precise starting and stopping of the stirring process are achieved.

The invention discloses an intelligent helmet control system based on an IMU (Inertial Measurement Unit), particularly relates to the field of riding monitoring, and is used for solving the technical problems that an existing intelligent helmet is high in collision misjudgment rate under strong road surface vibration and complex riding actions and is difficult to stably trigger a reliable rescue process. A helmet inertial measurement unit and a reference inertial measurement unit are respectively arranged on a helmet and a vehicle structural member, coordinate calibration and time synchronization are carried out, and a road vibration compensation model is constructed by using a frequency domain analysis result of the reference inertial measurement unit in a sliding time window. Road vibration and vehicle body vibration are separated from signals of the helmet inertial measurement unit, residual acceleration and angular velocity characteristics representing relative movement of the head are obtained, an accident confirmation signal is generated based on multi-threshold joint judgment, and a communication unit and a vehicle control interface are linked for execution.

The invention discloses a digital audio processing system based on a DSP, and relates to the field of digital audio processing, and the system comprises an acquisition module which is used for capturing vehicle body vibration sound waves, environment incoming noise and in-cabin original audio signals, and generating a multi-dimensional acoustic data stream through voiceprint feature extraction so as to output an original sound signal matrix; the analysis module is used for mapping the original sound signal matrix to a phase space, extracting singular attractor features of noise evolution through a chaos theory, and generating a noise dynamic model; according to the method, various sound waves can be accurately captured and converted into multi-dimensional data, deep analysis and targeted counteracting of noise are achieved on the basis, meanwhile, an acoustic adjustment scheme matched with the environment in the cabin can be generated, the acoustic environment can be dynamically optimized in combination with the physiological state of passengers, and potential noise is pre-judged in advance for suppression.

The utility model provides an automobile chassis with an anti-collision buffer structure, which relates to the technical field of automobile chassis, and comprises a chassis body, one side of the chassis body is fixedly connected with a front connecting piece, and the other side of the chassis body is fixedly connected with a rear connecting piece. The bottom of the chassis body is provided with an auxiliary buffering device for protecting and buffering the bottom of the chassis, the auxiliary buffering device comprises an air bag and a protection plate, the air bag is expanded when the air bag is inflated, and the protection plate moves downwards under the action of expansion of the air bag, so that the bottom of the chassis is protected and buffered. The protection plate can shield the bottom of the chassis, collision between the riding chassis and the ground during driving of an automobile is prevented, damage to the chassis body is reduced, most automobile body vibration caused by collision can be counteracted through the expanded air bag, the riding comfort is improved, and the maintenance cost is reduced.

The invention relates to the field of pump room intelligent control, and particularly discloses a pump room control method and system. The method comprises the steps that pump body vibration signals and current signals are collected, and input characteristic data of a unified structure are constructed; inputting the feature data into the fusion depth diagnosis model, extracting multi-dimensional features, completing association modeling, and generating a risk assessment information structure; generating an alarm mark and an isolation demand according to the risk information, and executing a fault pump isolation operation; a standby pump scheduling sequence is generated according to the isolation result, and a switching instruction is sent out; and combining system feedback information to optimize a diagnosis model and a scheduling strategy. According to the invention, the fault identification precision, the isolation control efficiency and the intelligent level of standby pump dispatching of the pump room under complex working conditions are obviously improved.

The invention belongs to the technical field of machine room inspection, and particularly discloses a communication machine room inspection device and method based on computer vision, and the device comprises an inspection vehicle, a buffer seat, a loading seat, a camera, an execution mechanism and an image processing system, the buffering seat is provided with mechanical anti-shake structures such as a sliding groove, a sliding block, a movable frame and a spring damper, and the influence of vehicle body vibration on image acquisition stability can be effectively reduced. The device further comprises functional components such as a laser distance sensor and a mechanical arm. The method comprises the steps of image acquisition, image comparison, abnormity identification, operation execution, pressure feedback control and the like, and can realize automatic abnormity identification, target positioning, intervention execution and alarm and report generation. The intelligent, automatic and anti-interference capabilities of communication machine room inspection are improved, and the system is suitable for high-frequency, large-scale and multi-type equipment inspection scenes.

The invention discloses an underground breathing flow monitoring method and system based on adaptive filtering, and the method comprises the steps: collecting an airflow signal at the mouth and nose of a miner in real time through an MEMS hot film sensor, and synchronously collecting a body vibration signal through an acceleration sensor, and obtaining original breathing data containing dynamic interference and corresponding vibration data; the method comprises the following steps: preprocessing original breathing data containing dynamic interference and corresponding vibration data to obtain a digital breathing flow signal and a standardized reference vibration signal; jointly inputting the digital respiratory flow signal and the standardized reference vibration signal into a filtering processing model based on an LMS adaptive algorithm to obtain a target respiratory flow signal; performing data analysis on the target respiratory flow signal, and calculating to obtain a real-time respiratory flow value, respiratory frequency and tidal volume parameters of the monitored object; the real-time breathing flow value, the breathing frequency and the tidal volume parameters obtained through calculation are locally displayed in real time, and monitoring of breathing flow data during underground operation is achieved.

The invention belongs to the technical field of equipment state monitoring, and discloses a relay state monitoring and diagnosis method and system. Vibration time domain signals of all monitoring points in the working process of a relay are collected, a time delay characteristic matrix is constructed through segmented cross-correlation operation, and a near-field sound source candidate area is analyzed and recognized in combination with the spatial divergence of a time delay gradient vector field. A sound-vibration coupling propagation model is introduced, near-field sound source excitation and structure conduction vibration components are distinguished, multi-component signal decoupling is realized through spatial constraint and frequency domain sparsity constraint, and a relay body vibration signal is effectively separated. The method comprises the following steps: performing time-frequency decomposition on a body vibration signal, extracting a transient impact feature of a contact action and a steady-state vibration feature of coil excitation, constructing a multi-dimensional state feature vector, and realizing state diagnosis through similarity matching with a preset feature library. According to the invention, the early fault detection sensitivity and diagnosis accuracy of the relay are improved, and a reliable basis is provided for preventive maintenance.

The invention relates to a sensor implanting device and a sensor implanting system. The sensor implanting device comprises an upper cover, a needle assisting device module, an emitter module and a bottom cover, the needle assisting device module is integrated in the upper cover and comprises a movable triggering support, a fixing frame, a needle locking assembly and an elastic element, the movable triggering support is pressed and driven by the upper cover to release a guide needle, and the guide needle is stably withdrawn by means of the elastic element. According to the device, through an integrated structure and a cooperative transmission design, the implantation operation process is remarkably simplified, the number of parts and the manufacturing cost are reduced, and meanwhile, needle body vibration in the traditional needle withdrawing process is effectively inhibited, so that wound injury is reduced, the pain of a patient is relieved, and the safety and comfort in the implantation process are improved.

The invention relates to the technical field of inner frame assembly, and discloses a British inner frame assembly machine, which comprises a machine table, a machine frame, a control panel and a control panel, the vibration disc feeding system comprises a universal head body vibration disc, a first elastic piece clockwise vibration disc, a first elastic piece anticlockwise vibration disc, a second elastic piece clockwise vibration disc, a second elastic piece anticlockwise vibration disc, an upper cover vibration disc and a vibration disc feeding channel connected with all the vibration discs. The rotating disc mechanism is installed on the machine table and comprises a rotating disc and a plurality of workpiece bases distributed on the rotating disc in the circumferential direction. And the arranged vibration disc feeding system can automatically and orderly convey all parts to the rotary disc mechanism, so that the steps of manual operation are greatly reduced, and the assembly efficiency is improved. And a plurality of workpiece seats are designed on the turntable mechanism, so that a plurality of plug inner frames can be assembled at the same time, and the production efficiency is further improved. The vibration disc material taking mechanism can accurately take out parts from a vibration disc and place the parts on a workpiece seat through accurate cooperation of a transverse moving air cylinder, a lifting air cylinder and a clamp air cylinder, and the assembling precision and stability are guaranteed.

The utility model belongs to the technical field of automobile shock absorption, and discloses an automobile shock absorption simulation device which comprises a shock absorption supporting plate, a main body shock simulation assembly, a block shock simulation assembly and a bumping and climbing simulation assembly. The partitioning vibration simulation assembly is detachably arranged at the top of the damping supporting plate, the jolting and climbing simulation assemblies are oppositely arranged on the two sides of the damping supporting plate, and the jolting and climbing simulation assemblies on the two sides are rotationally connected with the damping supporting plate. Through the main body vibration simulation assembly with the overall vibration effect, the damping effect of an automobile in a vibration road section during use can be effectively detected, through arrangement of a plurality of auxiliary vibration grooves, auxiliary vibration supporting columns and auxiliary vibration springs, the vibration simulation effect is improved, and the damping effect of the automobile is more truly detected; and the influence on the outside during vibration simulation is reduced through the vibration supporting base made of the foam aluminum alloy material.

The invention discloses a dynamic balance adjusting device and method for a magnetic suspension fan rotor, and relates to the technical field of self-adaptive adjustment. The method comprises the steps of collecting a suspension bearing displacement signal, a magnetic suspension coil current signal, a machine body vibration acceleration signal, a motor end electromagnetic response signal and a rotor angular displacement parameter, and constructing a rotor operation signal set; performing preprocessing and feature extraction on each signal to obtain four types of feature data; inputting the comprehensive characteristic data into a rotor balance diagnosis model to identify the unbalance state of the rotor; based on an amplitude phase inversion algorithm, solving a virtual counterweight amplitude and a phase adjustment amount, and injecting into a suspension coil to execute adjustment; judging whether dynamic correction is needed or not according to the real-time comprehensive characteristic data, and if yes, generating a dynamic gain coefficient to correct the adjustment parameters and then injecting the adjustment parameters into the suspension coil again; according to the invention, real-time identification and self-adaptive adjustment are carried out on the mass unbalance vibration of the magnetic suspension fan rotor, the operation vibration of the rotor is effectively inhibited, and the balance stability and reliability of the system are improved.

The invention discloses a human body protection active suspension system control method, device and equipment and a storage medium, and the method comprises the steps: collecting vibration acceleration data of a vehicle body and an unsprung in real time after a human body protection function of a current vehicle is activated; converting the vibration acceleration into a vertical vibration frequency, and judging whether the vertical vibration frequency exceeds a preset vertical threshold value or not; when the vertical vibration frequency exceeds a preset vertical threshold value, the current of the active actuator is adjusted; the vehicle body vibration frequency can be effectively prevented from falling below the safety limit value, health risks caused by continuous exposure of pregnant women and other special groups to high-frequency vibration are avoided, it is ensured that the vibration environment in the driving process meets the human body tolerance standard, transmission of road surface vibration excitation is reduced through a calibration algorithm, the vehicle body vibration frequency is improved, and the driving safety is improved. The protection on the human body is enhanced, the human body is prevented from being exposed in a high-frequency vibration environment for a long time, and the control speed and efficiency of the active suspension system are improved.

The invention provides a passenger car body fatigue life prediction and early warning method fusing visual and frequency domain data. The method comprises the following steps: synchronously acquiring a car body vibration time domain signal and a road surface image; converting the time domain signal into a power spectral density curve, extracting frequency domain features, and combining image visual features to jointly identify the grade of the road surface; constructing and dynamically calibrating a digital twin simulation model based on the curve; fusing physical, frequency domain, virtual, visual and knowledge data, and predicting the residual fatigue life through a neural network; on the basis of the power spectral density curve, calculating equivalent fatigue stress through a Miller criterion to carry out fatigue evaluation, and calculating maximum quasi-static stress according to a criterion 3 to carry out static strength evaluation; and dynamically triggering and managing monitoring, early warning and emergency three-level closed-loop early warning according to the road grade, the fatigue damage value and the stress intensity ratio. Accurate sensing of working conditions, fatigue-strength collaborative evaluation and multi-stage dynamic early warning are realized, and the accuracy and practicability of passenger car body safety monitoring are improved.

The invention relates to the technical field of automation equipment, in particular to a lithium battery sealing body vibration feeding device and a method thereof.The lithium battery sealing body vibration feeding device comprises a machine body, a feeding unit, a feeding unit and a discharging track, the feeding unit comprises a vibration disc arranged on the machine body, and battery covers are distributed in the vibration disc; the feeding unit comprises a feeding rail which is connected to one side of a discharging port of the vibration disc and used for conveying the battery covers, the discharging rail is used for conveying trays used for containing the battery covers, and a material moving suction cup used for transferring the battery covers is arranged between the feeding rail and the discharging rail. The feeding unit and the feeding unit are arranged to achieve circulating conveying of the battery covers, the transfer track is further arranged between the feeding track and the discharging track, and when the battery covers are transferred, the poses of the multiple battery covers are adjusted through the two push pieces on the transfer track, so that the battery covers can be conveniently and rapidly transferred. And rapid transition is achieved through a material moving suction cup, and the machining efficiency is effectively improved.

The invention provides a profiling hob mower, an active and passive vibration reduction method and a hob design method.Three hob mowing tools are arranged at the rear end of the mower in a staggered mode, hobs are controlled by an electric push rod and an electric push rod sliding block mechanism to achieve ground profiling, and magneto-rheological dampers are arranged on the electric push rod and the electric push rod sliding block mechanism to achieve active vibration reduction control; spraying rod postures are collected by tilt angle sensors arranged on the hobs, three ultrasonic ranging modules at the front end conduct distance measurement on the ground, signals are sent to a control unit, the control unit accurately controls the postures of the hobs, and rubber damping gaskets are arranged at the connecting positions of the left and right hobs and an electric push rod sliding block mechanism and the connecting positions of the hobs and electric push rods to achieve passive damping. The problems that the cutting height is uneven and the machine body vibrates too much under the complex terrain are solved through the profiling adjustment and multi-mode vibration reduction technology, passive vibration reduction is strengthened through an active vibration reduction mode, the stability of the hob is improved, energy is saved, and the multi-mode vibration reduction hob is suitable for efficient operation of hilly orchards and ridges.

The invention relates to the technical field of flow signal processing and leakage early warning, in particular to an oil engine intelligent monitoring system and method based on multi-source data analysis. A data acquisition unit acquires an oil return pipe flow pulse signal, an engine body vibration signal and an oil pump load rate parameter in real time; the vibration direction analysis unit distinguishes vertical and horizontal vibration dominant modes according to the load rate and outputs directional data and compensation and early warning signals, and the eddy current pseudo peak value detection unit is matched with a pulse template by means of wavelet decomposition, identifies the amplitude, frequency and dislocation characteristics of a pseudo peak value at a pipe diameter sudden change position, and outputs the directional data and the compensation and early warning signals. The dynamic baseline correction unit constructs a vibration and eddy current coupling factor model, compensates a pseudo peak lifting effect at a low load and corrects time sequence offset at a high load, the leakage judgment unit calculates corrected flow deviation degree and weighted residual energy distribution characteristics, leakage alarm is triggered when an alarm threshold value is exceeded, misjudgment caused by interference is eliminated, and the oil engine leakage monitoring accuracy is improved.

The invention discloses a vehicle control method and device, and the method comprises the steps that a vehicle control device can adjust a vehicle to a target mode, and the anti-carsickness function of the vehicle in the target mode is in an enabled state; the anti-carsickness function presets a human body whole body vibration measurement evaluation index in a corresponding preset range, and the human body whole body vibration measurement evaluation index is associated with at least one of the following items: a frequency weighted acceleration value, a frequency weighted acceleration root-mean-square value, a maximum transient vibration value MTVV, a motion sickness dose value MSDV or a vibration dose value VDV; and adjusting the torque of the vehicle to enable the whole body vibration measurement evaluation index to be within a corresponding preset range. Therefore, on the premise of responding to the real driving intention of the driver, the output torque is adjusted to relieve the carsickness feeling of passengers, and the purpose of considering the real driving intention of the driver and the dynamic property of the vehicle is achieved.

The invention discloses a whole body vibration rehabilitation device for preventing and treating sarcopenia. The whole body vibration rehabilitation device comprises a bearing bottom plate and a body vibration platform fixedly installed in the middle of the top face of the bearing bottom plate. The top surface of the body vibration platform is fixedly connected to the bottom end of the sitting stool body; the left side and the right side of the front end of the body vibration platform are rotationally connected to the rear ends of the transmission rotating shafts through bearings; wherein a foot stepping platform is fixedly arranged at the center position of the top surface of the lower limb vibration platform; a driving motor is fixedly arranged on the right side of the rear portion of the body vibration platform. According to the whole-body vibration rehabilitation device for preventing and treating sarcopenia, the body vibration platform installed below the sitting stool body drives the lower limb vibration platform to conduct vibration massage on the body of a patient, and meanwhile, leg massage contacts which rotate and heat are matched with foot electrotherapy contacts to stimulate muscles of the patient; the muscle is assisted to achieve the effects of promoting blood circulation and removing heat.

The application relates to a ship body vibration suppression parameter determination method and device, computer equipment, a computer readable storage medium and a computer program product. The method comprises the following steps: acquiring a coupling finite element model of an equipment, a base and a ship body structure; performing power flow analysis on the coupling finite element model to obtain a power flow analysis result; identifying a key transmission path based on the power flow analysis result; and determining path stiffness matching parameters of path blocking and integrated frequency parameters of the equipment, the base and the ship body based on the key transmission path. The method can improve the vibration suppression effect and facilitate modification of the parameters in the later stage.

The present application relates to the technical field of transformer fault diagnosis, and in particular to a transformer body vibration signal analysis and fault diagnosis method, device and medium. The present application combines the kurtosis characteristics of the vibration signal, adopts a semi-soft threshold function wavelet denoising method based on the threshold selection method of the 3sigm rule, and achieves better denoising effect. Through the fault diagnosis model of the organic fusion of the two improved HHT transforms-mobilenetV2 model, combined with different feature extraction methods, it is more conducive to retaining the effective features of the vibration signal; the improved mobilenetV2 model designs a multi-scale deep convolution model, introduces a channel attention mechanism before the channel-by-channel convolution, and after multi-scale deep convolution feature extraction, a multi-source data attention mechanism is introduced; without affecting the safe and reliable operation of the transformer, the intelligent diagnosis of the vibration state fault of the transformer is realized.

The invention relates to the technical field of engineering surveying, in particular to a three-dimensional laser engineering surveying scanner based on unmanned aerial vehicle remote sensing image sensing access and a use method thereof, the scanner comprises an unmanned aerial vehicle body and a bearing plate arranged on the unmanned aerial vehicle body, and the bearing plate is provided with symmetrically arranged fixing plates; the supporting assembly is arranged on the fixing plate, and a scanner body is connected to the supporting assembly; the vibration suppression mechanism is arranged on the bearing plate and connected with the supporting assembly, and the bearing plate is further provided with a bidirectional damping mechanism connected with the supporting assembly. When the scanner body generates low-frequency large-amplitude vibration or high-frequency small-amplitude vibration due to wind power or machine body vibration, suppression or rigid supporting actions can be performed on different vibrations, so that the measurement accuracy of the scanner body is ensured.

The present application relates to the field of medical informatics, and provides a tooth abnormal vibration signal detection system, comprising: an arc-shaped base body; a plurality of arc-shaped base body vibration sensors embedded in the arc-shaped base body, each arc-shaped base body vibration sensor corresponding to one of two sides of a predetermined implant implantation position of a user and being adjacent to a tooth, for real-time sensing of an external mechanical vibration signal acting on the arc-shaped base body and the two sides of the tooth; a bone conduction vibration sensor for sensing a bone conduction vibration signal conducted to the predetermined implant screw base through the jaw bone of the user; and a signal processing module for receiving the external mechanical vibration signal and the bone conduction vibration signal respectively, performing frequency domain conversion, calculating the similarity of first and second frequency spectrum characteristics, and outputting a same frequency judgment result. The present application improves the real-time detection accuracy of implant nail and tooth root collision, and improves the implant success rate and safety.

The embodiment of the invention discloses a vehicle seat adjusting method and device, equipment and a medium. The method comprises the steps of determining target relative data, and when the target relative data is smaller than or equal to a preset relative threshold value, obtaining target operation data and target object weight of a target vehicle; based on the target vehicle model, according to the target operation data and a preset model algorithm, determining a target vehicle body vibration frequency, and according to the target vehicle body vibration frequency and a preset damping configuration table, determining initial damping data; determining target damping compensation data according to the weight of the target object and a preset damping compensation table, and determining target damping data according to the initial damping data and the target damping compensation data; and the target valve opening degree is determined according to the target damping data and a preset valve opening degree table, the pre-adjusted target electromagnetic valve is adjusted again according to the target valve opening degree, and an adjusted target seat is obtained. And the accuracy and the timeliness of adjusting the vehicle seat are improved.

Provided is an electric suspension device that provides a comfortable ride with a sense of unity between the driver and the vehicle, even during braking in sporty driving situations. The electric suspension device includes: an electromagnetic actuator, disposed between the vehicle body and wheels, that generates a load to attenuate vehicle body vibrations; an information acquisition unit that acquires information about the vehicle's sprung load state and the road surface conditions; a target load calculation unit that calculates a first target load for skyhook control based on the sprung load state and a second target load for predictive control based on the road surface conditions; and a load control unit that performs load control on the electromagnetic actuator. The target load calculation unit further calculates a third target load for pitch generation control based on a target pitch angle and calculates a combined target load by combining the first and second target loads with the third target load. The load control unit uses the combined target load to control the load of the electromagnetic actuator.

The invention discloses an image translation-based inclined view angle rotator vibration displacement measurement method. The method comprises the following steps of: performing cutting operation on an acquired rotator vibration image under a standard view angle and an acquired rotator vibration image under L random view angles; randomly extracting a preset number of random view angle cutting images and standard view angle cutting images of matched frames from the L random view angles, and taking the standard view angle cutting images as labels of the random view angle cutting images to construct a data set; training and verifying the image translation model through the training set and the verification set to obtain a trained image translation model; selecting one of the obtained rotating body vibration images of the preset time length under the L random view angles, inputting the selected rotating body vibration images into a trained image translation model, and obtaining a standard view angle image of a frame number corresponding to the preset time length; carrying out image splicing operation according to the standard view angle images with the frame number corresponding to the preset duration to obtain a spliced image; and performing edge detection on the spliced image, extracting an edge contour of the rotating body, obtaining sub-pixel-level displacement data, and converting the sub-pixel-level displacement data into a displacement value under a world coordinate system. According to the invention, the vibration displacement of the rotor can be effectively and accurately extracted from a plurality of shooting angles, and a more reliable and accurate scheme is provided for the measurement of the vibration displacement of the rotating body.

The utility model discloses a kind of EGR valve fixed support that can prevent vibration, it is related to EGR valve technical field, including mounting plate, EGR valve body, further include: adjusting assembly, set in the mounting plate, for adjusting the length of fixed support;Locking assembly, set in the mounting plate, for locking adjusting assembly;Mounting assembly, set in the adjusting assembly, for installing EGR valve body;Fixed component, set in the mounting assembly, for fixed mounting assembly;Damping component, set in the mounting assembly, for preventing EGR valve body vibration, by the cooperation of adjusting assembly, utilize the knob of rotation to drive screw rod rotation, so that screw rod drives adjusting plate movement, to make the sliding plate fixedly connected with adjusting plate slide along support shell, to reach the length of fixed support can be adjusted, so that fixed support can be installed on different vehicle models, expand the application range of fixed support.

The present invention belongs to the technical field of motor assembly, and particularly relates to a method for improving the assembly quality of high-power density motors, comprising the following steps: (1) Monitoring the perpendicularity of the bearing positioning step with a gauge block; (2) Hand-held positioning method for hot sleeving the bearing; (3) Axial hammering method for the bearing; (4) Installation and alignment method for the outer ring of the cylindrical bearing; (5) Tightening the bearing housing symmetrically and checking the bearing installation quality by the disk rotation method; (6) Monitoring the clearance between the inner and outer covers and the shaft with a feeler gauge; (7) Four-point symmetric knocking method for the end cover; (8) Disk turning auscultation method. By analyzing the influencing factors of phenomena such as internal rubbing sound of the motor, rubbing of the inner and outer covers against the shaft, shaft movement, large bearing vibration, large body vibration, abnormal bearing sound, and high bearing temperature, the above assembly method is designed, which can achieve the effects of improving the motor assembly quality and extending the service life of the motor.