176 results about "Bending vibration" patented technology

The invention discloses a stator blade shape-following frequency modulation design method based on a bending vibration mode and application, belongs to the field of vibration design of stator blades of aero-engines and gas turbines, and is suitable for vibration frequency modulation design of non-cantilever type stator structure blades (such as fans and gas compressor stators) with inner rings and outer rings in the aero-engines or the gas turbines. According to the method, firstly, static frequency and dynamic frequency modal analysis is carried out through finite element modeling, and dangerous resonance points and corresponding vibration modes in a working rotating speed range are recognized by combining a Campbell diagram; based on a vibration mode amplitude normalization result, setting a vibration degree parameter and a scale factor, selecting a high response node and carrying out directed disturbance, and updating a structure model to improve a target vibration mode frequency; and through frequency amplification verification and iterative optimization, geometric reconstruction and frequency modulation confirmation are finally completed in combination with aerodynamic performance and processing requirements. The method can realize rapid and accurate frequency modulation of a specific bending vibration mode, avoids introduction of new resonance, and has the advantages of high efficiency, strong adaptability and the like.

The present invention discloses a method and device for simultaneously measuring the bending vibration and torsional vibration of a rotating machinery shaft. The gear disk is installed on the shaft to be measured, and the gear disk is driven to rotate by the shaft to be measured. An alternating voltage signal is output by the eddy current sensor and converted into a digital signal by the software part, so as to obtain the original vibration signal. The maximum value finding method is used twice to extract the bending vibration and torsional vibration of the shaft. Through the above method, the simultaneous measurement of the torsional vibration and bending vibration of the shaft can be realized. The same set of sensors and instruments are used for the two types of vibration measurements, and the cost is relatively low.

A vibronic mass flow sensor (100) comprises: a pipe inlet section (18); a vibratory S-shaped measuring pipe (10) for guiding the medium, with twofold rotational symmetry about an axis perpendicular to a measuring pipe plane; a pipe outlet section (19); at least one vibration exciter (53) for exciting bending vibrations of the measuring pipe (10) in a bending vibration mode; at least two vibration sensors for detecting vibrations of the measuring pipe; a support body (30); an inlet-side bearing body (21) and an outlet-side bearing body (22); wherein the measuring pipe (10) is rigidly connected to the support body (30) by means of the bearing bodies and is bounded by the bearing bodies; wherein the measuring pipe (10) connects to the pipe inlet and outlet sections;wherein the measuring tube (10) has two vibration nodes in an F3 bending vibration mode, which are spaced apart from the bearing bodies; wherein two damping mass bodies (56, 58) are attached to the measuring tube (10), each having a center of gravity that is no more than half the outer diameter of the measuring tube (10) from a position where, when the measuring tube is filled with water, the nearest vibration node is located.

A piezoelectric device includes a piezoresonator body and a set of electrodes disposed on the piezoresonator body. The piezoresonator body includes a bulk region and a contact element integral with and protruding from the bulk region, and further includes opposing first and second surfaces. A pair of excitation electrodes are disposed on the first surface. A common electrode is disposed on the second surface. The piezoresonator body is characterized by a longitudinal axis and a transverse axis, and further characterized by a natural resonant frequency (v1) of first-order longitudinal standing vibrations along the transverse axis and a natural resonant frequency (v2) of second-order bending standing vibrations along the longitudinal axis, with v1 < v2 ≤ 1.1v1.

The invention provides a double-constraint radial transduction ultrasonic motor, which comprises an annular rotor and a plurality of stators distributed in the annular rotor in an annular array, and is characterized in that each stator comprises a metal elastomer, a left fixing hole, a right fixing hole, a left piezoelectric ceramic, a right piezoelectric ceramic and an elastic blade group for forming pre-pressure on the annular rotor, the working vibration mode of the stator is first-order standing wave type bending vibration, the left fixing hole and the right fixing hole are formed in the metal elastic body and are formed in the two wave node positions of the first-order standing wave type bending vibration respectively, namely, the amplitude is zero during vibration, and the elastic blade set comprises a left-end elastic blade, a middle elastic blade and a right-end elastic blade. The vibration asymmetry of the metal elastomer can be effectively improved, the structural rigidity of the motor can be improved, the output torque of the motor can be improved, the energy transmission efficiency and the driving capacity can be improved, and the overall performance of the motor can be remarkably improved.

A method for determining variables influencing a total zero point error of a Coriolis mass flow meter comprises: exciting a vibration of a bending vibration mode; measuring a first total zero point error T at a flow of zero; ascertaining a first damping value D of the vibration of the bending vibration mode; measuring an exciter-independent zero point error I during a decaying vibration of the bending vibration mode at a flow of zero; ascertaining a first exciter-dependent contribution E to the first total zero point error T based on the first total zero point error T and based on the exciter-independent zero point error I; and ascertaining a sensitivity factor S for the bending vibration mode based on the first exciter-dependent contribution E to the total zero point error T and based on the first damping value D.

The invention discloses a bridge nonlinear flutter modal characteristic analysis method, device and equipment and a medium, and relates to the technical field of numerical simulation, fluid mechanics software is utilized, and a Navier-Stokes equation is subjected to transient solution based on a grid file and a development program to obtain lift force, torque and resistance of a current time step length; judging whether the current time step length is smaller than a preset time step length threshold value or not, and if not, judging whether all working conditions corresponding to different parameters in the development program are completely calculated or not; if all the calculation is completed, obtaining all lift forces, torques and resistances; carrying out amplitude change flutter derivative identification and calculation on all lift forces, torques and resistances to obtain amplitude change flutter derivatives related to vertical bending vibration, torsional vibration and lateral bending vibration, and carrying out bridge nonlinear flutter modal feature analysis on a bridge section by utilizing the amplitude change flutter derivatives to obtain a nonlinear flutter modal feature analysis result; the amplitude change flutter derivative related to lateral vibration can be recognized, and the accuracy and universality of amplitude change flutter derivative recognition are improved.

Disclosed is a multi-modal and multi-degree-of-freedom piezoelectric active vibration isolation platform and a working method therefor. The piezoelectric active vibration isolation platform includes an upper platform, a lower platform, a control module, and four vibration isolation modules, where the vibration isolation module includes a passive vibration isolation unit and an active vibration isolation unit; the passive vibration isolation unit includes an upper connector, a lower connector, a cross Hooke hinge, and a first acceleration sensor; the active vibration isolation unit includes a fixed beam, a pre-tightening bolt, a second acceleration sensor, and a driving component; the platform can provide active vibration isolation for the longitudinal (axial) vibration and the bending vibration in any radial direction of a vibration isolation object, and has the advantages of fast response, resistance to electromagnetic interference, and light weight.

The invention provides a novel double-bend ultrasonic cutting device, the cutting device is provided with a body and two coil racks, the body is provided with two excitation areas, namely an excitation area I and an excitation area II, coils are wound on the coil racks, the coils provide excitation magnetic fields for the excitation area I and the excitation area II, and the coil racks are wound on the coil racks. The two coil racks wound with coils are arranged on the peripheries of the first excitation area and the second excitation area in a sleeving mode respectively, a blade is arranged at the head of the body through a tool bolt, and the first excitation area provides bending vibration parallel to the surface of the blade under the action of an excitation magnetic field. The second excitation area provides bending vibration perpendicular to the surface of the blade under the action of the excitation magnetic field, and therefore a space oval track is coupled at the position of a tool nose of the blade. Composite bending vibration in two directions is realized by changing the direction of a bias magnetic field, so that the elliptical track of a tool nose is coupled, the cutting force is reduced, the surface quality of a workpiece is improved, and blade abrasion is reduced.

The invention discloses a longitudinal bending composite type six-degree-of-freedom piezoelectric active vibration isolation platform and a working method thereof. The vibration isolation platform adopts a modular structural design, a vibration isolation connecting platform and a base platform are sequentially arranged from top to bottom and are connected through four uniformly distributed vibration isolation modules, and each vibration isolation module forms a multi-stage vibration transmission structure through a fixed base, a transducer base, a piezoelectric transducer, an amplitude-change pole, a pre-tightening bolt and a small flexible hinge. The control module collects feedback signals of a first acceleration sensor arranged on the vibration isolation connecting platform and feedforward signals of a second acceleration sensor arranged on the base platform, and outputs 12-channel control signals to the piezoelectric transducers of the vibration isolation modules after signal processing. The piezoelectric transducer is driven to generate a composite motion mode of longitudinal vibration and multidirectional bending vibration, and active suppression of longitudinal vibration and radial bending vibration in any direction of a vibration isolation object is achieved. The device has the advantages of multi-degree-of-freedom vibration isolation, compact structure, lightweight design, independent control, high stability and the like, and has important application value in the fields of space reflecting mirrors, micro-nano manufacturing equipment vibration control and multi-degree-of-freedom vibration isolation systems.

The utility model provides a small medical ultrasonic amplitude transformer. The small medical ultrasonic amplitude transformer comprises a base cylinder, a nose cylinder and a cutter bar cylinder. The base cylinder is provided with an internal thread and is used for being detachably connected with a transducer or other external components. The nose portion cylinder axially extends from the front end of the base portion cylinder, two symmetrical and parallel flat portions are arranged on the circumferential face of the nose portion cylinder, and the flat portions are used for being matched with the whole transducer to be installed, so that accurate positioning of the direction of the tool bit is guaranteed, and pre-tightening and fixing during assembly are facilitated. The cutter bar cylinder extends from the front end of the nose cylinder, the front portion of the cutter bar cylinder is of an arc-shaped structure, the vibration mode of the cutter head can be adjusted, bending vibration is overlaid on the basis of longitudinal vibration, and a longer effective cutting line is formed. The cutting edge limited by the multiple cutting faces is arranged on the arc-shaped front portion of the cylindrical cutter bar, the edge width and the cutting area of the cutting edge are larger, and better blood coagulation and sealing effects can be achieved. The cutting face where the cutting edge is located is perpendicular to the extending plane of the flat part so that the vibration direction of the arc-shaped front part can be accurately controlled.

A rail vehicle has improved rigidity against vertical bending vibration while avoiding an increase in mass of the rail vehicle and interference with infrastructure equipment. The rail vehicle includes a roof body constituting an upper surface; a side body constituting a side surface; an end body constituting an end surface in a longitudinal direction of the side body; an underframe constituting a lower surface; and a bogie supporting the underframe, in which the side body includes a plurality of openings and a pier between the openings, and a reinforcing body is arranged on a vehicle interior surface of the pier between one opening situated above the bogie and an other opening adjacent to the one opening and situated near a center in a longitudinal direction of the rail vehicle so as to extend from an upper corner of the one opening toward a lower corner of the other opening.

The invention discloses a blade vibration fatigue strength and three-dimensional fatigue crack propagation prediction method which comprises the following steps: carrying out uniaxial tensile test and fracture toughness measurement on a blade test piece material to obtain material mechanical parameters of the blade test piece material; performing a bending vibration fatigue test on the blade test piece to obtain the fatigue strength of the blade test piece; a three-dimensional fatigue fracture phase field model is constructed, and phase field simulation parameters are obtained through finite element calculation; based on material mechanical parameters and phase field simulation parameters, a blade three-dimensional simulation model is established by simulating a blade sample in a bending vibration fatigue test, a periodic pressure load is applied to a blade basin of the blade to simulate an aerodynamic load in the service process of the blade, the three-dimensional fatigue crack propagation behavior of the blade is calculated, and the vibration fatigue strength of the blade is predicted. According to the method, a three-dimensional fatigue fracture phase field model is established, numerical solution is performed by using a finite element method, the three-dimensional fatigue crack propagation behavior of the blade under the periodic vibration load can be effectively predicted, and the blade fatigue prediction accuracy is improved.

A cell detachment apparatus that detaches cells placed on a culture surface of a culture container for cells by applying vibration to the cells includes a vibrator and a vibrating plate, wherein the vibrator, the vibrating plate, an acoustic transmission medium, and the culture container are stacked in this order, wherein a bending vibration is excited on the culture container when a vibration of the vibrating plate is transmitted to the culture container via the acoustic transmission medium, and wherein the acoustic transmission medium and the culture container come into contact with each other at a region including an antinode of the bending vibration and do not come into contact at a node of the bending vibration.

Coriolis mass flowmeter and / or density meter (100) comprising: at least two measuring tubes (110) which are bent in the rest position, wherein the measuring tubes (110) have measuring tube center lines which run in pairs mirror-symmetrically to a first mirror plane (Syz) which extends between the measuring tubes (110), wherein the measuring tube center lines each run mirror-symmetrically to a second mirror plane (Sxy) which extends perpendicular to the first mirror plane (Syz); at least one excitation arrangement (140) and at least one sensor arrangement (142); a collector (120) on the inlet side and an outlet side, wherein the measuring tubes (110) are fluidically combined with one of the collectors (120) on the inlet side and the outlet side; a support body (124) which rigidly connects the inlet-side collector (120) and the outlet-side collector (120); and at least one plate-shaped coupler (132, 134) on the inlet side and the outlet side, wherein the measuring tubes (110) are connected to one another in pairs by means of the couplers (132, 134) in order to form an oscillator, wherein the couplers (132, 134) are arranged symmetrically to the first mirror plane (Syz) and in pairs symmetrically to the second mirror plane (Sxy), wherein the excitation arrangement (140) is designed to excite a bending vibration mode between the two measuring tubes (110) of the respective oscillator, wherein the sensor arrangement (142) is adapted to detect oscillations of the respective oscillator, wherein the measuring tube center lines of the measuring tubes (110) of at least one oscillator between the second mirror plane (Sxy) and the collectors (120) each have a first bent section (114), a second bent section (118) and a straight section (116) arranged between the bent sections (114, 118), to which the two bent sections (114, 118) adjoin, wherein the first bent section (114) and the second bent section (118) are bent in opposite directions, wherein the second bent section (118) is arranged on the side of the straight section (116) facing away from the second mirror plane (Sxy), wherein the projection of the measuring tube center line between the intersection point with the second mirror plane (Sxy) and the transition between the straight section (116) and the second bent section (118) onto the second mirror plane (Sxy) Arch height (h) defined,wherein twice the distance between the second mirror plane (Sxy) and the measuring tube center line at the transition between the straight section (116) and the second curved section (118) defines an arc width (w), wherein the quotient of the arc height (h) divided by the arc width (w) defines a relative arc height (h, r ) which is not less than 0.65, where the relative arch height (h r ) is not more than 1.0, wherein the first curved sections (114) between the second mirror plane (Sxy) and the straight section (116) each have a plurality of stiffening bodies (151, 152, 153, 154) which surround the respective measuring tube (110) in a ring shape, wherein at least one of the couplers (132, 134) on the inlet side and the outlet side has a tuning opening surrounded by a closed edge between the measuring tubes (110) connected by the coupler (132, 134) for influencing the oscillation properties of the respective oscillator, wherein the tuning opening in the first mirror plane (Syz) has an extension of at least 70% of the diameter of the measuring tubes (110).

The invention discloses a sandwich type piezoelectric driving double-shaft output mobile robot and a working method thereof.The sandwich type piezoelectric driving double-shaft output mobile robot comprises a sandwich type piezoelectric transducer, a pre-pressure applying mechanism, a driving wheel unit, a first output shaft, a second output shaft, a base body frame and a connecting plate, and a clamping mechanism is not arranged on a stator base body of the sandwich type piezoelectric transducer; a single pin of the pre-pressure applying mechanism and a through hole in the middle of a stator node beam are used for restraining, automatic rolling transmission of contact force is achieved under the condition of matching of the pin hole, and pre-pressure transmitted by the pre-pressure applying mechanism achieves force balance under the counter-acting force generated when a first driving foot and a second driving foot of the sandwich type piezoelectric transducer make contact with the curved surface of an output shaft. The elliptical motion trail direction of the stator driving foot can be controlled by controlling the electric signal phase difference of the longitudinal vibration piezoelectric ceramic set and the bending vibration piezoelectric ceramic set, forward and reverse motion of the first output shaft and the second output shaft is achieved through friction contact, and the mobile robot achieves forward, backward and rapid locking motion.

The present invention discloses a bending vibration type inertial ultrasonic motor and its control method, which relates to the technical field of ultrasonic motors. The bending vibration type inertial ultrasonic motor includes: a stator, a piezoelectric ceramic, a carbon fiber tube, a rod, a slider and a housing. The stator is a circular ring metal sheet, and there are uniformly distributed fixing structures along the outer edge of the circular ring, which are connected to the housing; the piezoelectric ceramic is a flat circular ring sheet, and one sheet is respectively attached to the upper and lower surfaces of the stator; the carbon fiber tube and the rod form a pair of friction pairs, converting the bending vibration of the stator into the up and down movement of the rod; the rod is fixedly connected to the slider and can drive the slider to move. The present invention can provide sufficient rotational speed output and torque output while ensuring the small size of the motor and meeting the structural requirements of the micro zoom system.

The invention provides a resonance type compliant cavity composite structure pressure-resistant bending disc transducer which comprises a simply-supported ring, composite pressure-resistant assemblies are symmetrically arranged on the simply-supported ring up and down, the composite pressure-resistant assemblies and the simply-supported ring form an air cavity, and each composite pressure-resistant assembly comprises a watertight layer, a piezoelectric ceramic piece, a metal bending disc and a resonance type compliant pressure-resistant shell. The shell is arranged in the simply-supported ring, the metal bent disc is arranged above the shell, a medium cavity is formed between the shell and the metal bent disc, water permeable holes are formed in the side wall of the medium cavity, and the exterior of the transducer is communicated with the medium cavity. And a watertight layer covers the outer side. According to the composite shell structure, a pressure bearing structure and a driving structure are designed separately, pressure balance between driving force and a driving element is achieved through a coupling medium, and the anti-pressure capacity is improved; the shell is a bending vibration shell with the working frequency consistent with that of the transducer, the driving impedance is low, and the static pressure resistance is high.

The invention provides an ultrasonic transducer and ultrasonic cleaning equipment, the ultrasonic transducer comprises a piezoelectric exciter and a vibration radiant panel, the vibration radiant panel is fixed on the piezoelectric exciter, a power supply is electrically connected with the piezoelectric exciter, so that the piezoelectric exciter can generate longitudinal vibration, and the longitudinal vibration of the piezoelectric exciter can excite bending vibration of the vibration radiant panel. The longitudinal vibration sandwich type piezoelectric ultrasonic transducer solves the defects that an existing longitudinal vibration sandwich type piezoelectric ultrasonic transducer is small in radiation area, weak in longitudinal displacement amplitude, long in longitudinal size and the like to a great extent, and has the advantages of being small in space needed by operation, large in sound radiation area and sound radiation power, small in size and the like. The ultrasonic transducer can be widely applied to the application requirements of miniaturization and thinning of the installation space of the ultrasonic transducer. Meanwhile, the longitudinal bending displacement amplitude conversion ratio of the ultrasonic transducer can be influenced by the length, and / or the width and / or the thickness of the vibration radiant panel, so that the longitudinal bending displacement amplitude conversion ratio of the ultrasonic transducer is further improved through the size of the vibration radiant panel.

The invention belongs to the technical field of ultrasonic drivers, and provides a multi-mode composite multi-degree-of-freedom ultrasonic driver, a control method and a robot. The multi-mode composite multi-degree-of-freedom ultrasonic driver comprises a vibrating body and an electric ceramic piece arranged in the middle of the vibrating body; the vibrating body comprises a square groove formed in the middle and spiral grooves formed in the two ends respectively. The electric ceramic piece comprises a longitudinal bending piezoelectric ceramic piece, a stretching piezoelectric ceramic piece and a transverse bending piezoelectric ceramic piece which are arranged on the square groove; driving feet are arranged at the two ends of the vibrating body respectively, and the spiral grooves are located between the driving feet and the electric ceramic pieces. Tensile vibration provided by the tensile piezoelectric ceramic piece can be converted into tensile-torsional composite vibration through the spiral groove structure, and the tensile vibration and the torsional vibration are combined and overlapped with longitudinal bending vibration and transverse bending vibration respectively, so that the driver moves in the longitudinal and transverse orthogonal directions; on the basis that the size design difficulty is not increased, the multi-degree-of-freedom movement requirement is met.

A vibration motor (101) includes: a vibration element (102); comprises: an elastic element (106) having a planar or rod-like shape and an X-direction being a longitudinal direction; a piezoelectric element (108) disposed on a first surface (112) of the elastic element (106), the first surface (112) having a normal in a Z direction perpendicular to the X direction; and at least two frictional contact elements (110) protruding from a second surface (112) of the resilient element (106), the second surface (112) being opposite the first surface (110); and a movable element (104) pressed against the frictional contact element (110), in which the vibration element (102) is configured to cause the frictional contact element (110) to generate an elliptical vibration on a ZX plane by applying an alternating voltage signal having a predetermined frequency to the piezoelectric element (108), the friction contact element (110) is arranged in such a way that a tensile vibration that stretches and contracts in the X-direction and a bending vibration that deforms in the Z-direction are caused, and the movable element (104) is designed to be moved in the X-direction and in the-X-direction relative to the friction contact element (110) by the elliptical vibration of the friction contact element (110).

The invention provides a multi-dimensional vibration platform with oppositely-arranged double-sandwich piezoelectric actuators and an excitation method of the multi-dimensional vibration platform, and belongs to the technical field of high-frequency vibration engineering and micro-nano machining.The vibration platform comprises a center platform, the two oppositely-arranged piezoelectric actuators, two end covers and two bolts, wherein the center platform is integrated with the tail end platform, the two flexible hinges and the two amplitude-change poles, and the center platform is slender and is in mirror symmetry about the longitudinal symmetry plane of the tail end platform. The piezoelectric actuator comprises a longitudinal vibration ceramic group, a bending vibration ceramic group around the Y axis and a bending vibration ceramic group around the Z axis, translation along the X / Y / Z axis and rotation around the Y / Z axis can be realized through in-phase or anti-phase excitation different combinations under the condition of not increasing extra driving channels, and five-degree-of-freedom high-frequency micro-vibration output can be achieved at most. The structure has high symmetry, low parasitic vibration, compact size and high integration, and is suitable for precise engineering scenes such as micro-nano processing, laser-assisted manufacturing, cell manipulation and active vibration suppression.

The present invention relates to the technical field of inertial sensors, and particularly relates to a MEMS inertial vibration system with a self-measuring function of motion posture and a preparation method, including: an inertial vibration platform that moves with multi-directional degrees of freedom, and the direction conforms to the cooperative bending vibration generated by the inertial vibration platform under a voltage excitation signal; a PMUT array that is arrayed at a preset interval on the bottom surface of the inertial vibration platform and is bonded to the bottom surface of the inertial vibration platform. The PMUT array includes a plurality of transmitting sub-arrays and a plurality of receiving sub-arrays, and the transmitting sub-arrays and the receiving sub-arrays correspond one by one. Each of the transmitting sub-arrays and the receiving sub-arrays includes a plurality of PMUT single tubes, and the plurality of PMUT single tubes are connected to each other to form a transmitting sub-array or a receiving sub-array. The beneficial technical effects of the present invention include: being able to perform self-monitoring of the motion state of the MEMS inertial vibration platform, providing a reference for the self-calibration of the MEMS inertial sensor, and simplifying the implementation method of self-calibration.

The invention discloses a magnetostrictive ultrasonic longitudinal-bending dual-mode cutting device and an operation method, the longitudinal-bending dual-mode cutting device is provided with a longitudinal-bending dual-mode main body, the front end of the longitudinal-bending dual-mode main body is provided with a stepped-shaft-shaped tool apron, chamfers or fillets are arranged between steps, the front end of the stepped-shaft-shaped tool apron is provided with a tool mounting part, and the front end of the stepped-shaft-shaped tool apron is provided with a tool holder; a threaded connection hole is formed in the cutter mounting head part, and the cutter is matched with the threaded connection hole and is fixed on the cutter mounting head part through a cutter fixing bolt. Free switching between the longitudinal vibration mode and the bending vibration mode of the machining device can be achieved by adjusting the direct current of the bias coil at the bias coil rack according to the working condition and the machining requirement of a workpiece, and the precision of the machined surface and the flexibility of a machining tool are improved.

The present invention discloses a low-frequency, multi-directional, broadband vibration absorber for pipelines, comprising a frame, an elastic element, a base mass, an additional mass, and a mounting fixture. The frame is in the shape of a ring, and a plurality of layers of periodically arranged circular holes are provided on the surface, and the diameters of the circular holes in each layer are different. The elastic element is composed of an inner ring, an outer ring, and a connecting beam. A connecting beam is provided between the inner ring and the outer ring. The outer ring is embedded in the circular hole of the frame and its size corresponds one-to-one to the circular hole on the frame. The base mass is detachably installed in the inner ring. The additional mass is attached to the base mass. By selectively installing the base mass and the additional mass, the resonant frequency of the vibration absorber can be adjusted to achieve regulation of the vibration absorption frequency band; by rotating the elastic element as a whole in the circular hole of the frame to change the bending vibration direction of the connecting beam, the vibration reduction direction of the vibration absorber and the coordinated control of multi-directional vibration can be achieved. The present invention has a compact structure, occupies a small space, is simple to process, has a low manufacturing cost, and has good low-frequency, multi-directional, broadband vibration reduction capabilities.

To provide an ultrasonic irradiator that expands and uniforms a micro bubble generation range, and reduces invasion of an ultrasonic wave to a living body.SOLUTION: A piezoelectric device 1 is driven by AC voltage of a predetermined frequency, and is largely telescopically vibrated to a radial direction as shown by an arrow H. To a lower surface of the piezoelectric device 1, an acoustic vibrator 2 is adhered. The acoustic vibrator 2 includes: an upper circular flat surface 2a that is opposite to the piezoelectric device 1; and a lower concave semispherical surface 2b that is opposite to the upper circular flat surface 2a. At a center of the upper circular flat surface 2a, an upper concaved-like surface 2a-1 for a cymbal structure is formed. At a center of the acoustic vibrator 2, a thin cymbal structure S is formed. Both of lower edge portions 2c and 2d of the lower concave-like semispherical surface 2b are bending-vibrated as shown by an arrow C in accordance with an extension vibration H of a radial direction of the piezoelectric device 1. Bend-vibration C are enhanced by a vertical vibration V of the cymbal structure S.SELECTED DRAWING: Figure 1

The application discloses a patch type ultrasonic motor vibrator, a method and an ultrasonic motor of composite vibration, which comprises a vibrating body and a PZT plate group; the PZT plate group comprises a torsional PZT plate and a bending PZT plate; the top of the vibrating body is provided with a driving leg; the top surface and the bottom surface of the vibrating body are provided with the torsional PZT plates, the torsional PZT plates are polarized along the thickness direction of the vibrating body, and the polarization directions of two adjacent torsional PZT plates are opposite; the bending PZT plates are arranged at the nodes corresponding to the bending vibration on the two sides of the vibrating body, and the polarization directions of the bending PZT plates are the same. The four-foot vibrating body of the torsional / bending composite vibration type is designed, and the torsional excitation mode of the'reverse polarization and synchronous excitation' is designed, so that the electromechanical coupling degree of the linear ultrasonic motor is improved, and the problems of small driving force and low mechanical output caused by the vibration mode of the traditional vibrator are solved.

The application provides a tension-compression-bending vibration fatigue and force-position characteristic integrated testing device and system of a micro elastic element, and belongs to the technical field of micro elastic element testing. The device and system solve the problems of single function of the existing elastic element testing equipment, dependence of vibration fatigue testing and force-position characteristic testing on independent professional systems, and difficulty in adapting to millimeter-level micro elastic elements and difficulty in realizing multi-dimensional deformation loading. The device and system comprise a Y-direction displacement platform fixed on a base, an X-direction displacement platform provided with an adapter platform between the Y-direction displacement platform, a force sensor provided on the base along an axis parallel to the Y-direction displacement platform and connected with a displacement amplification mechanism, and a vibration exciter fixed on the base and connected with the displacement amplification mechanism. One end of a test spring is connected to the X-direction displacement platform, and the other end of the test spring is provided with two stations. A first station is connected with the force sensor, a second station is connected with the displacement amplification mechanism, and a laser displacement sensor detects the displacement of the displacement amplification mechanism.

The utility model relates to carbon tape processing technical field, and disclose a kind of carbon tape base ink dip-dyeing device, including dip-dyeing box, the left and right ends of dip-dyeing box are respectively provided with input and output for carbon tape base to pass in, and the inner bottom side of dip-dyeing box is provided with abutting roller, and the upper portion of dip-dyeing box is provided with bending vibration subassembly corresponding abutting roller;The bending vibration subassembly includes the cross frame being arranged on the top of dip-dyeing box.This carbon tape base ink dip-dyeing device, carbon tape base enters dip-dyeing box inside under the conveying effect of external conveying mechanism, when carbon tape passes through dip-dyeing box, utilize hydraulic rod elongation to drive link plate and press frame to move down, and carbon tape base is abutted and bent between abutting roller and press roller, utilize bending effect to extend dip-dyeing path and time, and utilize exciter to drive press frame and press roller vibration, vibration rolling is carried out to carbon tape base, to further shake out the fine bubble adhered to the surface of carbon tape base, improve the contact effect of ink and carbon tape base, to further improve dip-dyeing quality.

The invention relates to the technical field of material mechanical parameter testing, and discloses a Young modulus calculation method of a square section rod, which comprises the following steps: acquiring section side length, length and mass information of a sample by using a high-precision measuring tool; acquiring time domain sound pressure signals under two supporting states by using a professional microphone; converting a time domain sound pressure signal into a frequency domain signal, and respectively identifying a second-order damping bending vibration frequency and a third-order damping bending vibration frequency on a spectrogram; the damping influence is ignored; calculating h / l to obtain a corresponding coefficient; substituting all parameters into a formula to obtain a Young modulus value; and calculating the average Young modulus. According to the method, the universality of the calculation method for the square section rod in different practical application scenes is enhanced, and the Young modulus can be accurately calculated as long as corresponding parameters are obtained and substituted no matter how the size of the sample changes.